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Relocate platform specific drivers (#13894)

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* Relocate platform specific drivers

* Move stm eeprom

* Tidy up slightly
This commit is contained in:
Joel Challis 2021-08-17 23:43:09 +01:00 • committed by GitHub
parent 483691dd73
commit 1bb7af4d44
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GPG key ID: 4AEE18F83AFDEB23
41 changed files with 5 additions and 5 deletions
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138
drivers/avr/analog.c
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@ -1,138 +0,0 @@
/* Copyright 2015 Jack Humbert
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <stdint.h>
#include "analog.h"
static uint8_t aref = ADC_REF_POWER;
void analogReference(uint8_t mode) { aref = mode & (_BV(REFS1) | _BV(REFS0)); }
// Arduino compatible pin input
int16_t analogRead(uint8_t pin) {
#if defined(__AVR_ATmega32U4__)
// clang-format off
static const uint8_t PROGMEM pin_to_mux[] = {
//A0 A1 A2 A3 A4 A5
//F7 F6 F5 F4 F1 F0
0x07, 0x06, 0x05, 0x04, 0x01, 0x00,
//A6 A7 A8 A9 A10 A11
//D4 D7 B4 B5 B6 D6
0x20, 0x22, 0x23, 0x24, 0x25, 0x21
};
// clang-format on
if (pin >= 12) return 0;
return adc_read(pgm_read_byte(pin_to_mux + pin));
#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
if (pin >= 8) return 0;
return adc_read(pin);
#else
return 0;
#endif
}
int16_t analogReadPin(pin_t pin) { return adc_read(pinToMux(pin)); }
uint8_t pinToMux(pin_t pin) {
switch (pin) {
// clang-format off
#if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
case F0: return 0; // ADC0
case F1: return _BV(MUX0); // ADC1
case F2: return _BV(MUX1); // ADC2
case F3: return _BV(MUX1) | _BV(MUX0); // ADC3
case F4: return _BV(MUX2); // ADC4
case F5: return _BV(MUX2) | _BV(MUX0); // ADC5
case F6: return _BV(MUX2) | _BV(MUX1); // ADC6
case F7: return _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // ADC7
default: return _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#elif defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
case F0: return 0; // ADC0
case F1: return _BV(MUX0); // ADC1
case F4: return _BV(MUX2); // ADC4
case F5: return _BV(MUX2) | _BV(MUX0); // ADC5
case F6: return _BV(MUX2) | _BV(MUX1); // ADC6
case F7: return _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // ADC7
case D4: return _BV(MUX5); // ADC8
case D6: return _BV(MUX5) | _BV(MUX0); // ADC9
case D7: return _BV(MUX5) | _BV(MUX1); // ADC10
case B4: return _BV(MUX5) | _BV(MUX1) | _BV(MUX0); // ADC11
case B5: return _BV(MUX5) | _BV(MUX2); // ADC12
case B6: return _BV(MUX5) | _BV(MUX2) | _BV(MUX0); // ADC13
default: return _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#elif defined(__AVR_ATmega32A__)
case A0: return 0; // ADC0
case A1: return _BV(MUX0); // ADC1
case A2: return _BV(MUX1); // ADC2
case A3: return _BV(MUX1) | _BV(MUX0); // ADC3
case A4: return _BV(MUX2); // ADC4
case A5: return _BV(MUX2) | _BV(MUX0); // ADC5
case A6: return _BV(MUX2) | _BV(MUX1); // ADC6
case A7: return _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // ADC7
default: return _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#elif defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
case C0: return 0; // ADC0
case C1: return _BV(MUX0); // ADC1
case C2: return _BV(MUX1); // ADC2
case C3: return _BV(MUX1) | _BV(MUX0); // ADC3
case C4: return _BV(MUX2); // ADC4
case C5: return _BV(MUX2) | _BV(MUX0); // ADC5
// ADC7:6 not present in DIP package and not shared by GPIO pins
default: return _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0); // 0V
#endif
// clang-format on
}
return 0;
}
int16_t adc_read(uint8_t mux) {
uint16_t low;
// Enable ADC and configure prescaler
ADCSRA = _BV(ADEN) | ADC_PRESCALER;
#if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
// High speed mode and ADC8-13
ADCSRB = _BV(ADHSM) | (mux & _BV(MUX5));
#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
// High speed mode only
ADCSRB = _BV(ADHSM);
#endif
// Configure mux input
#if defined(MUX4)
ADMUX = aref | (mux & (_BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0)));
#else
ADMUX = aref | (mux & (_BV(MUX3) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0)));
#endif
// Start the conversion
ADCSRA |= _BV(ADSC);
// Wait for result
while (ADCSRA & _BV(ADSC))
;
// Must read LSB first
low = ADCL;
// Must read MSB only once!
low |= (ADCH << 8);
// turn off the ADC
ADCSRA &= ~(1 << ADEN);
return low;
}

53
drivers/avr/analog.h
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@ -1,53 +0,0 @@
/* Copyright 2015 Jack Humbert
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include "quantum.h"
#ifdef __cplusplus
extern "C" {
#endif
void analogReference(uint8_t mode);
int16_t analogRead(uint8_t pin);
int16_t analogReadPin(pin_t pin);
uint8_t pinToMux(pin_t pin);
int16_t adc_read(uint8_t mux);
#ifdef __cplusplus
}
#endif
#define ADC_REF_EXTERNAL 0 // AREF, Internal Vref turned off
#define ADC_REF_POWER _BV(REFS0) // AVCC with external capacitor on AREF pin
#define ADC_REF_INTERNAL (_BV(REFS1) | _BV(REFS0)) // Internal 2.56V Voltage Reference with external capacitor on AREF pin (1.1V for 328P)
// These prescaler values are for high speed mode, ADHSM = 1
#if F_CPU == 16000000L || F_CPU == 12000000L
# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS1)) // /64
#elif F_CPU == 8000000L
# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS0)) // /32
#elif F_CPU == 4000000L
# define ADC_PRESCALER (_BV(ADPS2)) // /16
#elif F_CPU == 2000000L
# define ADC_PRESCALER (_BV(ADPS1) | _BV(ADPS0)) // /8
#elif F_CPU == 1000000L
# define ADC_PRESCALER _BV(ADPS1) // /4
#else
# define ADC_PRESCALER _BV(ADPS0) // /2
#endif

23
drivers/avr/glcdfont.c
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@ -1,23 +0,0 @@
// This is the 'classic' fixed-space bitmap font for Adafruit_GFX since 1.0.
// See gfxfont.h for newer custom bitmap font info.
#include "progmem.h"
// Standard ASCII 5x7 font
static const unsigned char font[] PROGMEM = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x5B, 0x4F, 0x5B, 0x3E, 0x3E, 0x6B, 0x4F, 0x6B, 0x3E, 0x1C, 0x3E, 0x7C, 0x3E, 0x1C, 0x18, 0x3C, 0x7E, 0x3C, 0x18, 0x1C, 0x57, 0x7D, 0x57, 0x1C, 0x1C, 0x5E, 0x7F, 0x5E, 0x1C, 0x00, 0x18, 0x3C, 0x18, 0x00, 0xFF, 0xE7, 0xC3, 0xE7, 0xFF, 0x00, 0x18, 0x24, 0x18, 0x00, 0xFF, 0xE7, 0xDB, 0xE7, 0xFF, 0x30, 0x48, 0x3A, 0x06, 0x0E, 0x26, 0x29, 0x79, 0x29, 0x26, 0x40, 0x7F, 0x05, 0x05, 0x07, 0x40, 0x7F, 0x05, 0x25, 0x3F, 0x5A, 0x3C, 0xE7, 0x3C, 0x5A, 0x7F, 0x3E, 0x1C, 0x1C, 0x08, 0x08, 0x1C, 0x1C, 0x3E, 0x7F, 0x14, 0x22, 0x7F, 0x22, 0x14, 0x5F, 0x5F, 0x00, 0x5F, 0x5F, 0x06, 0x09, 0x7F, 0x01, 0x7F, 0x00, 0x66, 0x89, 0x95, 0x6A, 0x60, 0x60, 0x60, 0x60, 0x60, 0x94, 0xA2, 0xFF, 0xA2, 0x94, 0x08, 0x04, 0x7E, 0x04, 0x08, 0x10, 0x20, 0x7E, 0x20, 0x10, 0x08, 0x08, 0x2A, 0x1C, 0x08, 0x08, 0x1C, 0x2A, 0x08, 0x08, 0x1E, 0x10, 0x10, 0x10, 0x10, 0x0C, 0x1E, 0x0C, 0x1E, 0x0C,
0x30, 0x38, 0x3E, 0x38, 0x30, 0x06, 0x0E, 0x3E, 0x0E, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5F, 0x00, 0x00, 0x00, 0x07, 0x00, 0x07, 0x00, 0x14, 0x7F, 0x14, 0x7F, 0x14, 0x24, 0x2A, 0x7F, 0x2A, 0x12, 0x23, 0x13, 0x08, 0x64, 0x62, 0x36, 0x49, 0x56, 0x20, 0x50, 0x00, 0x08, 0x07, 0x03, 0x00, 0x00, 0x1C, 0x22, 0x41, 0x00, 0x00, 0x41, 0x22, 0x1C, 0x00, 0x2A, 0x1C, 0x7F, 0x1C, 0x2A, 0x08, 0x08, 0x3E, 0x08, 0x08, 0x00, 0x80, 0x70, 0x30, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x60, 0x60, 0x00, 0x20, 0x10, 0x08, 0x04, 0x02, 0x3E, 0x51, 0x49, 0x45, 0x3E, 0x00, 0x42, 0x7F, 0x40, 0x00, 0x72, 0x49, 0x49, 0x49, 0x46, 0x21, 0x41, 0x49, 0x4D, 0x33, 0x18, 0x14, 0x12, 0x7F, 0x10, 0x27, 0x45, 0x45, 0x45, 0x39, 0x3C, 0x4A, 0x49, 0x49, 0x31, 0x41, 0x21, 0x11, 0x09, 0x07, 0x36, 0x49, 0x49, 0x49, 0x36, 0x46, 0x49, 0x49, 0x29, 0x1E, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x40, 0x34, 0x00, 0x00,
0x00, 0x08, 0x14, 0x22, 0x41, 0x14, 0x14, 0x14, 0x14, 0x14, 0x00, 0x41, 0x22, 0x14, 0x08, 0x02, 0x01, 0x59, 0x09, 0x06, 0x3E, 0x41, 0x5D, 0x59, 0x4E, 0x7C, 0x12, 0x11, 0x12, 0x7C, 0x7F, 0x49, 0x49, 0x49, 0x36, 0x3E, 0x41, 0x41, 0x41, 0x22, 0x7F, 0x41, 0x41, 0x41, 0x3E, 0x7F, 0x49, 0x49, 0x49, 0x41, 0x7F, 0x09, 0x09, 0x09, 0x01, 0x3E, 0x41, 0x41, 0x51, 0x73, 0x7F, 0x08, 0x08, 0x08, 0x7F, 0x00, 0x41, 0x7F, 0x41, 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01, 0x7F, 0x08, 0x14, 0x22, 0x41, 0x7F, 0x40, 0x40, 0x40, 0x40, 0x7F, 0x02, 0x1C, 0x02, 0x7F, 0x7F, 0x04, 0x08, 0x10, 0x7F, 0x3E, 0x41, 0x41, 0x41, 0x3E, 0x7F, 0x09, 0x09, 0x09, 0x06, 0x3E, 0x41, 0x51, 0x21, 0x5E, 0x7F, 0x09, 0x19, 0x29, 0x46, 0x26, 0x49, 0x49, 0x49, 0x32, 0x03, 0x01, 0x7F, 0x01, 0x03, 0x3F, 0x40, 0x40, 0x40, 0x3F, 0x1F, 0x20, 0x40, 0x20, 0x1F, 0x3F, 0x40, 0x38, 0x40, 0x3F, 0x63, 0x14, 0x08, 0x14, 0x63, 0x03, 0x04, 0x78, 0x04, 0x03,
0x61, 0x59, 0x49, 0x4D, 0x43, 0x00, 0x7F, 0x41, 0x41, 0x41, 0x02, 0x04, 0x08, 0x10, 0x20, 0x00, 0x41, 0x41, 0x41, 0x7F, 0x04, 0x02, 0x01, 0x02, 0x04, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00, 0x03, 0x07, 0x08, 0x00, 0x20, 0x54, 0x54, 0x78, 0x40, 0x7F, 0x28, 0x44, 0x44, 0x38, 0x38, 0x44, 0x44, 0x44, 0x28, 0x38, 0x44, 0x44, 0x28, 0x7F, 0x38, 0x54, 0x54, 0x54, 0x18, 0x00, 0x08, 0x7E, 0x09, 0x02, 0x18, 0xA4, 0xA4, 0x9C, 0x78, 0x7F, 0x08, 0x04, 0x04, 0x78, 0x00, 0x44, 0x7D, 0x40, 0x00, 0x20, 0x40, 0x40, 0x3D, 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00, 0x7C, 0x04, 0x78, 0x04, 0x78, 0x7C, 0x08, 0x04, 0x04, 0x78, 0x38, 0x44, 0x44, 0x44, 0x38, 0xFC, 0x18, 0x24, 0x24, 0x18, 0x18, 0x24, 0x24, 0x18, 0xFC, 0x7C, 0x08, 0x04, 0x04, 0x08, 0x48, 0x54, 0x54, 0x54, 0x24, 0x04, 0x04, 0x3F, 0x44, 0x24, 0x3C, 0x40, 0x40, 0x20, 0x7C, 0x1C, 0x20, 0x40, 0x20, 0x1C, 0x3C, 0x40, 0x30, 0x40, 0x3C,
0x44, 0x28, 0x10, 0x28, 0x44, 0x4C, 0x90, 0x90, 0x90, 0x7C, 0x44, 0x64, 0x54, 0x4C, 0x44, 0x00, 0x08, 0x36, 0x41, 0x00, 0x00, 0x00, 0x77, 0x00, 0x00, 0x00, 0x41, 0x36, 0x08, 0x00, 0x02, 0x01, 0x02, 0x04, 0x02, 0x3C, 0x26, 0x23, 0x26, 0x3C, 0x1E, 0xA1, 0xA1, 0x61, 0x12, 0x3A, 0x40, 0x40, 0x20, 0x7A, 0x38, 0x54, 0x54, 0x55, 0x59, 0x21, 0x55, 0x55, 0x79, 0x41, 0x22, 0x54, 0x54, 0x78, 0x42, // a-umlaut
0x21, 0x55, 0x54, 0x78, 0x40, 0x20, 0x54, 0x55, 0x79, 0x40, 0x0C, 0x1E, 0x52, 0x72, 0x12, 0x39, 0x55, 0x55, 0x55, 0x59, 0x39, 0x54, 0x54, 0x54, 0x59, 0x39, 0x55, 0x54, 0x54, 0x58, 0x00, 0x00, 0x45, 0x7C, 0x41, 0x00, 0x02, 0x45, 0x7D, 0x42, 0x00, 0x01, 0x45, 0x7C, 0x40, 0x7D, 0x12, 0x11, 0x12, 0x7D, // A-umlaut
0xF0, 0x28, 0x25, 0x28, 0xF0, 0x7C, 0x54, 0x55, 0x45, 0x00, 0x20, 0x54, 0x54, 0x7C, 0x54, 0x7C, 0x0A, 0x09, 0x7F, 0x49, 0x32, 0x49, 0x49, 0x49, 0x32, 0x3A, 0x44, 0x44, 0x44, 0x3A, // o-umlaut
0x32, 0x4A, 0x48, 0x48, 0x30, 0x3A, 0x41, 0x41, 0x21, 0x7A, 0x3A, 0x42, 0x40, 0x20, 0x78, 0x00, 0x9D, 0xA0, 0xA0, 0x7D, 0x3D, 0x42, 0x42, 0x42, 0x3D, // O-umlaut
0x3D, 0x40, 0x40, 0x40, 0x3D, 0x3C, 0x24, 0xFF, 0x24, 0x24, 0x48, 0x7E, 0x49, 0x43, 0x66, 0x2B, 0x2F, 0xFC, 0x2F, 0x2B, 0xFF, 0x09, 0x29, 0xF6, 0x20, 0xC0, 0x88, 0x7E, 0x09, 0x03, 0x20, 0x54, 0x54, 0x79, 0x41, 0x00, 0x00, 0x44, 0x7D, 0x41, 0x30, 0x48, 0x48, 0x4A, 0x32, 0x38, 0x40, 0x40, 0x22, 0x7A, 0x00, 0x7A, 0x0A, 0x0A, 0x72, 0x7D, 0x0D, 0x19, 0x31, 0x7D, 0x26, 0x29, 0x29, 0x2F, 0x28, 0x26, 0x29, 0x29, 0x29, 0x26, 0x30, 0x48, 0x4D, 0x40, 0x20, 0x38, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x38, 0x2F, 0x10, 0xC8, 0xAC, 0xBA, 0x2F, 0x10, 0x28, 0x34, 0xFA, 0x00, 0x00, 0x7B, 0x00, 0x00, 0x08, 0x14, 0x2A, 0x14, 0x22, 0x22, 0x14, 0x2A, 0x14, 0x08, 0x55, 0x00, 0x55, 0x00, 0x55, // #176 (25% block) missing in old code
0xAA, 0x55, 0xAA, 0x55, 0xAA, // 50% block
0xFF, 0x55, 0xFF, 0x55, 0xFF, // 75% block
0x00, 0x00, 0x00, 0xFF, 0x00, 0x10, 0x10, 0x10, 0xFF, 0x00, 0x14, 0x14, 0x14, 0xFF, 0x00, 0x10, 0x10, 0xFF, 0x00, 0xFF, 0x10, 0x10, 0xF0, 0x10, 0xF0, 0x14, 0x14, 0x14, 0xFC, 0x00, 0x14, 0x14, 0xF7, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x14, 0x14, 0xF4, 0x04, 0xFC, 0x14, 0x14, 0x17, 0x10, 0x1F, 0x10, 0x10, 0x1F, 0x10, 0x1F, 0x14, 0x14, 0x14, 0x1F, 0x00, 0x10, 0x10, 0x10, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x1F, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x10, 0x10, 0x10, 0x10, 0xF0, 0x10, 0x00, 0x00, 0x00, 0xFF, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0xFF, 0x10, 0x00, 0x00, 0x00, 0xFF, 0x14, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0x1F, 0x10, 0x17, 0x00, 0x00, 0xFC, 0x04, 0xF4, 0x14, 0x14, 0x17, 0x10, 0x17, 0x14, 0x14, 0xF4, 0x04, 0xF4, 0x00, 0x00, 0xFF, 0x00, 0xF7, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0xF7, 0x00, 0xF7, 0x14, 0x14, 0x14, 0x17, 0x14, 0x10, 0x10, 0x1F, 0x10, 0x1F,
0x14, 0x14, 0x14, 0xF4, 0x14, 0x10, 0x10, 0xF0, 0x10, 0xF0, 0x00, 0x00, 0x1F, 0x10, 0x1F, 0x00, 0x00, 0x00, 0x1F, 0x14, 0x00, 0x00, 0x00, 0xFC, 0x14, 0x00, 0x00, 0xF0, 0x10, 0xF0, 0x10, 0x10, 0xFF, 0x10, 0xFF, 0x14, 0x14, 0x14, 0xFF, 0x14, 0x10, 0x10, 0x10, 0x1F, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x38, 0x44, 0x44, 0x38, 0x44, 0xFC, 0x4A, 0x4A, 0x4A, 0x34, // sharp-s or beta
0x7E, 0x02, 0x02, 0x06, 0x06, 0x02, 0x7E, 0x02, 0x7E, 0x02, 0x63, 0x55, 0x49, 0x41, 0x63, 0x38, 0x44, 0x44, 0x3C, 0x04, 0x40, 0x7E, 0x20, 0x1E, 0x20, 0x06, 0x02, 0x7E, 0x02, 0x02, 0x99, 0xA5, 0xE7, 0xA5, 0x99, 0x1C, 0x2A, 0x49, 0x2A, 0x1C, 0x4C, 0x72, 0x01, 0x72, 0x4C, 0x30, 0x4A, 0x4D, 0x4D, 0x30, 0x30, 0x48, 0x78, 0x48, 0x30, 0xBC, 0x62, 0x5A, 0x46, 0x3D, 0x3E, 0x49, 0x49, 0x49, 0x00, 0x7E, 0x01, 0x01, 0x01, 0x7E, 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x44, 0x44, 0x5F, 0x44, 0x44, 0x40, 0x51, 0x4A, 0x44, 0x40, 0x40, 0x44, 0x4A, 0x51, 0x40, 0x00, 0x00, 0xFF, 0x01, 0x03, 0xE0, 0x80, 0xFF, 0x00, 0x00, 0x08, 0x08, 0x6B, 0x6B, 0x08, 0x36, 0x12, 0x36, 0x24, 0x36, 0x06, 0x0F, 0x09, 0x0F, 0x06, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00, 0x30, 0x40, 0xFF, 0x01, 0x01, 0x00, 0x1F, 0x01, 0x01, 0x1E, 0x00, 0x19, 0x1D, 0x17, 0x12, 0x00, 0x3C, 0x3C, 0x3C, 0x3C, 0x00, 0x00, 0x00, 0x00, 0x00 // #255 NBSP
};

536
drivers/avr/hd44780.c
View file

@ -1,536 +0,0 @@
/****************************************************************************
Title: HD44780U LCD library
Author: Peter Fleury <pfleury@gmx.ch> http://tinyurl.com/peterfleury
License: GNU General Public License Version 3
File: $Id: lcd.c,v 1.15.2.2 2015/01/17 12:16:05 peter Exp $
Software: AVR-GCC 3.3
Target: any AVR device, memory mapped mode only for AT90S4414/8515/Mega
DESCRIPTION
Basic routines for interfacing a HD44780U-based text lcd display
Originally based on Volker Oth's lcd library,
changed lcd_init(), added additional constants for lcd_command(),
added 4-bit I/O mode, improved and optimized code.
Library can be operated in memory mapped mode (LCD_IO_MODE=0) or in
4-bit IO port mode (LCD_IO_MODE=1). 8-bit IO port mode not supported.
Memory mapped mode compatible with Kanda STK200, but supports also
generation of R/W signal through A8 address line.
USAGE
See the C include lcd.h file for a description of each function
*****************************************************************************/
#include <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include "hd44780.h"
/*
** constants/macros
*/
#define DDR(x) (*(&x - 1)) /* address of data direction register of port x */
#if defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__)
/* on ATmega64/128 PINF is on port 0x00 and not 0x60 */
# define PIN(x) (&PORTF == &(x) ? _SFR_IO8(0x00) : (*(&x - 2)))
#else
# define PIN(x) (*(&x - 2)) /* address of input register of port x */
#endif
#if LCD_IO_MODE
# define lcd_e_delay() _delay_us(LCD_DELAY_ENABLE_PULSE)
# define lcd_e_high() LCD_E_PORT |= _BV(LCD_E_PIN);
# define lcd_e_low() LCD_E_PORT &= ~_BV(LCD_E_PIN);
# define lcd_e_toggle() toggle_e()
# define lcd_rw_high() LCD_RW_PORT |= _BV(LCD_RW_PIN)
# define lcd_rw_low() LCD_RW_PORT &= ~_BV(LCD_RW_PIN)
# define lcd_rs_high() LCD_RS_PORT |= _BV(LCD_RS_PIN)
# define lcd_rs_low() LCD_RS_PORT &= ~_BV(LCD_RS_PIN)
#endif
#if LCD_IO_MODE
# if LCD_LINES == 1
# define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_1LINE
# else
# define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_2LINES
# endif
#else
# if LCD_LINES == 1
# define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_1LINE
# else
# define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_2LINES
# endif
#endif
#if LCD_CONTROLLER_KS0073
# if LCD_LINES == 4
# define KS0073_EXTENDED_FUNCTION_REGISTER_ON 0x2C /* |0|010|1100 4-bit mode, extension-bit RE = 1 */
# define KS0073_EXTENDED_FUNCTION_REGISTER_OFF 0x28 /* |0|010|1000 4-bit mode, extension-bit RE = 0 */
# define KS0073_4LINES_MODE 0x09 /* |0|000|1001 4 lines mode */
# endif
#endif
/*
** function prototypes
*/
#if LCD_IO_MODE
static void toggle_e(void);
#endif
/*
** local functions
*/
/*************************************************************************
delay for a minimum of <us> microseconds
the number of loops is calculated at compile-time from MCU clock frequency
*************************************************************************/
#define delay(us) _delay_us(us)
#if LCD_IO_MODE
/* toggle Enable Pin to initiate write */
static void toggle_e(void) {
lcd_e_high();
lcd_e_delay();
lcd_e_low();
}
#endif
/*************************************************************************
Low-level function to write byte to LCD controller
Input: data byte to write to LCD
rs 1: write data
0: write instruction
Returns: none
*************************************************************************/
#if LCD_IO_MODE
static void lcd_write(uint8_t data, uint8_t rs) {
unsigned char dataBits;
if (rs) { /* write data (RS=1, RW=0) */
lcd_rs_high();
} else { /* write instruction (RS=0, RW=0) */
lcd_rs_low();
}
lcd_rw_low(); /* RW=0 write mode */
if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)) {
/* configure data pins as output */
DDR(LCD_DATA0_PORT) |= 0x0F;
/* output high nibble first */
dataBits = LCD_DATA0_PORT & 0xF0;
LCD_DATA0_PORT = dataBits | ((data >> 4) & 0x0F);
lcd_e_toggle();
/* output low nibble */
LCD_DATA0_PORT = dataBits | (data & 0x0F);
lcd_e_toggle();
/* all data pins high (inactive) */
LCD_DATA0_PORT = dataBits | 0x0F;
} else {
/* configure data pins as output */
DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN);
DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN);
DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN);
DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN);
/* output high nibble first */
LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN);
LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN);
LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN);
LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN);
if (data & 0x80) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN);
if (data & 0x40) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN);
if (data & 0x20) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);
if (data & 0x10) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);
lcd_e_toggle();
/* output low nibble */
LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN);
LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN);
LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN);
LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN);
if (data & 0x08) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN);
if (data & 0x04) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN);
if (data & 0x02) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);
if (data & 0x01) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);
lcd_e_toggle();
/* all data pins high (inactive) */
LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);
LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);
LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN);
LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN);
}
}
#else
# define lcd_write(d, rs) \
if (rs) \
*(volatile uint8_t *)(LCD_IO_DATA) = d; \
else \
*(volatile uint8_t *)(LCD_IO_FUNCTION) = d;
/* rs==0 -> write instruction to LCD_IO_FUNCTION */
/* rs==1 -> write data to LCD_IO_DATA */
#endif
/*************************************************************************
Low-level function to read byte from LCD controller
Input: rs 1: read data
0: read busy flag / address counter
Returns: byte read from LCD controller
*************************************************************************/
#if LCD_IO_MODE
static uint8_t lcd_read(uint8_t rs) {
uint8_t data;
if (rs)
lcd_rs_high(); /* RS=1: read data */
else
lcd_rs_low(); /* RS=0: read busy flag */
lcd_rw_high(); /* RW=1 read mode */
if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)) {
DDR(LCD_DATA0_PORT) &= 0xF0; /* configure data pins as input */
lcd_e_high();
lcd_e_delay();
data = PIN(LCD_DATA0_PORT) << 4; /* read high nibble first */
lcd_e_low();
lcd_e_delay(); /* Enable 500ns low */
lcd_e_high();
lcd_e_delay();
data |= PIN(LCD_DATA0_PORT) & 0x0F; /* read low nibble */
lcd_e_low();
} else {
/* configure data pins as input */
DDR(LCD_DATA0_PORT) &= ~_BV(LCD_DATA0_PIN);
DDR(LCD_DATA1_PORT) &= ~_BV(LCD_DATA1_PIN);
DDR(LCD_DATA2_PORT) &= ~_BV(LCD_DATA2_PIN);
DDR(LCD_DATA3_PORT) &= ~_BV(LCD_DATA3_PIN);
/* read high nibble first */
lcd_e_high();
lcd_e_delay();
data = 0;
if (PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN)) data |= 0x10;
if (PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN)) data |= 0x20;
if (PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN)) data |= 0x40;
if (PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN)) data |= 0x80;
lcd_e_low();
lcd_e_delay(); /* Enable 500ns low */
/* read low nibble */
lcd_e_high();
lcd_e_delay();
if (PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN)) data |= 0x01;
if (PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN)) data |= 0x02;
if (PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN)) data |= 0x04;
if (PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN)) data |= 0x08;
lcd_e_low();
}
return data;
}
#else
# define lcd_read(rs) (rs) ? *(volatile uint8_t *)(LCD_IO_DATA + LCD_IO_READ) : *(volatile uint8_t *)(LCD_IO_FUNCTION + LCD_IO_READ)
/* rs==0 -> read instruction from LCD_IO_FUNCTION */
/* rs==1 -> read data from LCD_IO_DATA */
#endif
/*************************************************************************
loops while lcd is busy, returns address counter
*************************************************************************/
static uint8_t lcd_waitbusy(void)
{
register uint8_t c;
/* wait until busy flag is cleared */
while ((c = lcd_read(0)) & (1 << LCD_BUSY)) {
}
/* the address counter is updated 4us after the busy flag is cleared */
delay(LCD_DELAY_BUSY_FLAG);
/* now read the address counter */
return (lcd_read(0)); // return address counter
} /* lcd_waitbusy */
/*************************************************************************
Move cursor to the start of next line or to the first line if the cursor
is already on the last line.
*************************************************************************/
static inline void lcd_newline(uint8_t pos) {
register uint8_t addressCounter;
#if LCD_LINES == 1
addressCounter = 0;
#endif
#if LCD_LINES == 2
if (pos < (LCD_START_LINE2))
addressCounter = LCD_START_LINE2;
else
addressCounter = LCD_START_LINE1;
#endif
#if LCD_LINES == 4
# if KS0073_4LINES_MODE
if (pos < LCD_START_LINE2)
addressCounter = LCD_START_LINE2;
else if ((pos >= LCD_START_LINE2) && (pos < LCD_START_LINE3))
addressCounter = LCD_START_LINE3;
else if ((pos >= LCD_START_LINE3) && (pos < LCD_START_LINE4))
addressCounter = LCD_START_LINE4;
else
addressCounter = LCD_START_LINE1;
# else
if (pos < LCD_START_LINE3)
addressCounter = LCD_START_LINE2;
else if ((pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4))
addressCounter = LCD_START_LINE3;
else if ((pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2))
addressCounter = LCD_START_LINE4;
else
addressCounter = LCD_START_LINE1;
# endif
#endif
lcd_command((1 << LCD_DDRAM) + addressCounter);
} /* lcd_newline */
/*
** PUBLIC FUNCTIONS
*/
/*************************************************************************
Send LCD controller instruction command
Input: instruction to send to LCD controller, see HD44780 data sheet
Returns: none
*************************************************************************/
void lcd_command(uint8_t cmd) {
lcd_waitbusy();
lcd_write(cmd, 0);
}
/*************************************************************************
Send data byte to LCD controller
Input: data to send to LCD controller, see HD44780 data sheet
Returns: none
*************************************************************************/
void lcd_data(uint8_t data) {
lcd_waitbusy();
lcd_write(data, 1);
}
/*************************************************************************
Set cursor to specified position
Input: x horizontal position (0: left most position)
y vertical position (0: first line)
Returns: none
*************************************************************************/
void lcd_gotoxy(uint8_t x, uint8_t y) {
#if LCD_LINES == 1
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE1 + x);
#endif
#if LCD_LINES == 2
if (y == 0)
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE1 + x);
else
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE2 + x);
#endif
#if LCD_LINES == 4
if (y == 0)
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE1 + x);
else if (y == 1)
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE2 + x);
else if (y == 2)
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE3 + x);
else /* y==3 */
lcd_command((1 << LCD_DDRAM) + LCD_START_LINE4 + x);
#endif
} /* lcd_gotoxy */
/*************************************************************************
*************************************************************************/
int lcd_getxy(void) { return lcd_waitbusy(); }
/*************************************************************************
Clear display and set cursor to home position
*************************************************************************/
void lcd_clrscr(void) { lcd_command(1 << LCD_CLR); }
/*************************************************************************
Set cursor to home position
*************************************************************************/
void lcd_home(void) { lcd_command(1 << LCD_HOME); }
/*************************************************************************
Display character at current cursor position
Input: character to be displayed
Returns: none
*************************************************************************/
void lcd_putc(char c) {
uint8_t pos;
pos = lcd_waitbusy(); // read busy-flag and address counter
if (c == '\n') {
lcd_newline(pos);
} else {
#if LCD_WRAP_LINES == 1
# if LCD_LINES == 1
if (pos == LCD_START_LINE1 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE1, 0);
}
# elif LCD_LINES == 2
if (pos == LCD_START_LINE1 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE2, 0);
} else if (pos == LCD_START_LINE2 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE1, 0);
}
# elif LCD_LINES == 4
if (pos == LCD_START_LINE1 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE2, 0);
} else if (pos == LCD_START_LINE2 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE3, 0);
} else if (pos == LCD_START_LINE3 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE4, 0);
} else if (pos == LCD_START_LINE4 + LCD_DISP_LENGTH) {
lcd_write((1 << LCD_DDRAM) + LCD_START_LINE1, 0);
}
# endif
lcd_waitbusy();
#endif
lcd_write(c, 1);
}
} /* lcd_putc */
/*************************************************************************
Display string without auto linefeed
Input: string to be displayed
Returns: none
*************************************************************************/
void lcd_puts(const char *s)
/* print string on lcd (no auto linefeed) */
{
register char c;
while ((c = *s++)) {
lcd_putc(c);
}
} /* lcd_puts */
/*************************************************************************
Display string from program memory without auto linefeed
Input: string from program memory be be displayed
Returns: none
*************************************************************************/
void lcd_puts_p(const char *progmem_s)
/* print string from program memory on lcd (no auto linefeed) */
{
register char c;
while ((c = pgm_read_byte(progmem_s++))) {
lcd_putc(c);
}
} /* lcd_puts_p */
/*************************************************************************
Initialize display and select type of cursor
Input: dispAttr LCD_DISP_OFF display off
LCD_DISP_ON display on, cursor off
LCD_DISP_ON_CURSOR display on, cursor on
LCD_DISP_CURSOR_BLINK display on, cursor on flashing
Returns: none
*************************************************************************/
void lcd_init(uint8_t dispAttr) {
#if LCD_IO_MODE
/*
* Initialize LCD to 4 bit I/O mode
*/
if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (&LCD_RS_PORT == &LCD_DATA0_PORT) && (&LCD_RW_PORT == &LCD_DATA0_PORT) && (&LCD_E_PORT == &LCD_DATA0_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) && (LCD_RS_PIN == 4) && (LCD_RW_PIN == 5) && (LCD_E_PIN == 6)) {
/* configure all port bits as output (all LCD lines on same port) */
DDR(LCD_DATA0_PORT) |= 0x7F;
} else if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)) {
/* configure all port bits as output (all LCD data lines on same port, but control lines on different ports) */
DDR(LCD_DATA0_PORT) |= 0x0F;
DDR(LCD_RS_PORT) |= _BV(LCD_RS_PIN);
DDR(LCD_RW_PORT) |= _BV(LCD_RW_PIN);
DDR(LCD_E_PORT) |= _BV(LCD_E_PIN);
} else {
/* configure all port bits as output (LCD data and control lines on different ports */
DDR(LCD_RS_PORT) |= _BV(LCD_RS_PIN);
DDR(LCD_RW_PORT) |= _BV(LCD_RW_PIN);
DDR(LCD_E_PORT) |= _BV(LCD_E_PIN);
DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN);
DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN);
DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN);
DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN);
}
delay(LCD_DELAY_BOOTUP); /* wait 16ms or more after power-on */
/* initial write to lcd is 8bit */
LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); // LCD_FUNCTION>>4;
LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); // LCD_FUNCTION_8BIT>>4;
lcd_e_toggle();
delay(LCD_DELAY_INIT); /* delay, busy flag can't be checked here */
/* repeat last command */
lcd_e_toggle();
delay(LCD_DELAY_INIT_REP); /* delay, busy flag can't be checked here */
/* repeat last command a third time */
lcd_e_toggle();
delay(LCD_DELAY_INIT_REP); /* delay, busy flag can't be checked here */
/* now configure for 4bit mode */
LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN); // LCD_FUNCTION_4BIT_1LINE>>4
lcd_e_toggle();
delay(LCD_DELAY_INIT_4BIT); /* some displays need this additional delay */
/* from now the LCD only accepts 4 bit I/O, we can use lcd_command() */
#else
/*
* Initialize LCD to 8 bit memory mapped mode
*/
/* enable external SRAM (memory mapped lcd) and one wait state */
MCUCR = _BV(SRE) | _BV(SRW);
/* reset LCD */
delay(LCD_DELAY_BOOTUP); /* wait 16ms after power-on */
lcd_write(LCD_FUNCTION_8BIT_1LINE, 0); /* function set: 8bit interface */
delay(LCD_DELAY_INIT); /* wait 5ms */
lcd_write(LCD_FUNCTION_8BIT_1LINE, 0); /* function set: 8bit interface */
delay(LCD_DELAY_INIT_REP); /* wait 64us */
lcd_write(LCD_FUNCTION_8BIT_1LINE, 0); /* function set: 8bit interface */
delay(LCD_DELAY_INIT_REP); /* wait 64us */
#endif
#if KS0073_4LINES_MODE
/* Display with KS0073 controller requires special commands for enabling 4 line mode */
lcd_command(KS0073_EXTENDED_FUNCTION_REGISTER_ON);
lcd_command(KS0073_4LINES_MODE);
lcd_command(KS0073_EXTENDED_FUNCTION_REGISTER_OFF);
#else
lcd_command(LCD_FUNCTION_DEFAULT); /* function set: display lines */
#endif
lcd_command(LCD_DISP_OFF); /* display off */
lcd_clrscr(); /* display clear */
lcd_command(LCD_MODE_DEFAULT); /* set entry mode */
lcd_command(dispAttr); /* display/cursor control */
} /* lcd_init */

348
drivers/avr/hd44780.h
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@ -1,348 +0,0 @@
/*************************************************************************
Title : C include file for the HD44780U LCD library (lcd.c)
Author: Peter Fleury <pfleury@gmx.ch> http://tinyurl.com/peterfleury
License: GNU General Public License Version 3
File: $Id: lcd.h,v 1.14.2.4 2015/01/20 17:16:07 peter Exp $
Software: AVR-GCC 4.x
Hardware: any AVR device, memory mapped mode only for AVR with
memory mapped interface (AT90S8515/ATmega8515/ATmega128)
***************************************************************************/
/**
@mainpage
Collection of libraries for AVR-GCC
@author Peter Fleury pfleury@gmx.ch http://tinyurl.com/peterfleury
@copyright (C) 2015 Peter Fleury, GNU General Public License Version 3
@file
@defgroup pfleury_lcd LCD library <lcd.h>
@code #include <lcd.h> @endcode
@brief Basic routines for interfacing a HD44780U-based character LCD display
LCD character displays can be found in many devices, like espresso machines, laser printers.
The Hitachi HD44780 controller and its compatible controllers like Samsung KS0066U have become an industry standard for these types of displays.
This library allows easy interfacing with a HD44780 compatible display and can be
operated in memory mapped mode (LCD_IO_MODE defined as 0 in the include file lcd.h.) or in
4-bit IO port mode (LCD_IO_MODE defined as 1). 8-bit IO port mode is not supported.
Memory mapped mode is compatible with old Kanda STK200 starter kit, but also supports
generation of R/W signal through A8 address line.
@see The chapter <a href=" http://homepage.hispeed.ch/peterfleury/avr-lcd44780.html" target="_blank">Interfacing a HD44780 Based LCD to an AVR</a>
on my home page, which shows example circuits how to connect an LCD to an AVR controller.
@author Peter Fleury pfleury@gmx.ch http://tinyurl.com/peterfleury
@version 2.0
@copyright (C) 2015 Peter Fleury, GNU General Public License Version 3
*/
#pragma once
#include <inttypes.h>
#include <avr/pgmspace.h>
#if (__GNUC__ * 100 + __GNUC_MINOR__) < 405
# error "This library requires AVR-GCC 4.5 or later, update to newer AVR-GCC compiler !"
#endif
/**@{*/
/*
* LCD and target specific definitions below can be defined in a separate include file with name lcd_definitions.h instead modifying this file
* by adding -D_LCD_DEFINITIONS_FILE to the CDEFS section in the Makefile
* All definitions added to the file lcd_definitions.h will override the default definitions from lcd.h
*/
#ifdef _LCD_DEFINITIONS_FILE
# include "lcd_definitions.h"
#endif
/**
* @name Definition for LCD controller type
* Use 0 for HD44780 controller, change to 1 for displays with KS0073 controller.
*/
#ifndef LCD_CONTROLLER_KS0073
# define LCD_CONTROLLER_KS0073 0 /**< Use 0 for HD44780 controller, 1 for KS0073 controller */
#endif
/**
* @name Definitions for Display Size
* Change these definitions to adapt setting to your display
*
* These definitions can be defined in a separate include file \b lcd_definitions.h instead modifying this file by
* adding -D_LCD_DEFINITIONS_FILE to the CDEFS section in the Makefile.
* All definitions added to the file lcd_definitions.h will override the default definitions from lcd.h
*
*/
#ifndef LCD_LINES
# define LCD_LINES 2 /**< number of visible lines of the display */
#endif
#ifndef LCD_DISP_LENGTH
# define LCD_DISP_LENGTH 16 /**< visibles characters per line of the display */
#endif
#ifndef LCD_LINE_LENGTH
# define LCD_LINE_LENGTH 0x40 /**< internal line length of the display */
#endif
#ifndef LCD_START_LINE1
# define LCD_START_LINE1 0x00 /**< DDRAM address of first char of line 1 */
#endif
#ifndef LCD_START_LINE2
# define LCD_START_LINE2 0x40 /**< DDRAM address of first char of line 2 */
#endif
#ifndef LCD_START_LINE3
# define LCD_START_LINE3 0x14 /**< DDRAM address of first char of line 3 */
#endif
#ifndef LCD_START_LINE4
# define LCD_START_LINE4 0x54 /**< DDRAM address of first char of line 4 */
#endif
#ifndef LCD_WRAP_LINES
# define LCD_WRAP_LINES 0 /**< 0: no wrap, 1: wrap at end of visibile line */
#endif
/**
* @name Definitions for 4-bit IO mode
*
* The four LCD data lines and the three control lines RS, RW, E can be on the
* same port or on different ports.
* Change LCD_RS_PORT, LCD_RW_PORT, LCD_E_PORT if you want the control lines on
* different ports.
*
* Normally the four data lines should be mapped to bit 0..3 on one port, but it
* is possible to connect these data lines in different order or even on different
* ports by adapting the LCD_DATAx_PORT and LCD_DATAx_PIN definitions.
*
* Adjust these definitions to your target.\n
* These definitions can be defined in a separate include file \b lcd_definitions.h instead modifying this file by
* adding \b -D_LCD_DEFINITIONS_FILE to the \b CDEFS section in the Makefile.
* All definitions added to the file lcd_definitions.h will override the default definitions from lcd.h
*
*/
#define LCD_IO_MODE 1 /**< 0: memory mapped mode, 1: IO port mode */
#if LCD_IO_MODE
# ifndef LCD_PORT
# define LCD_PORT PORTA /**< port for the LCD lines */
# endif
# ifndef LCD_DATA0_PORT
# define LCD_DATA0_PORT LCD_PORT /**< port for 4bit data bit 0 */
# endif
# ifndef LCD_DATA1_PORT
# define LCD_DATA1_PORT LCD_PORT /**< port for 4bit data bit 1 */
# endif
# ifndef LCD_DATA2_PORT
# define LCD_DATA2_PORT LCD_PORT /**< port for 4bit data bit 2 */
# endif
# ifndef LCD_DATA3_PORT
# define LCD_DATA3_PORT LCD_PORT /**< port for 4bit data bit 3 */
# endif
# ifndef LCD_DATA0_PIN
# define LCD_DATA0_PIN 4 /**< pin for 4bit data bit 0 */
# endif
# ifndef LCD_DATA1_PIN
# define LCD_DATA1_PIN 5 /**< pin for 4bit data bit 1 */
# endif
# ifndef LCD_DATA2_PIN
# define LCD_DATA2_PIN 6 /**< pin for 4bit data bit 2 */
# endif
# ifndef LCD_DATA3_PIN
# define LCD_DATA3_PIN 7 /**< pin for 4bit data bit 3 */
# endif
# ifndef LCD_RS_PORT
# define LCD_RS_PORT LCD_PORT /**< port for RS line */
# endif
# ifndef LCD_RS_PIN
# define LCD_RS_PIN 3 /**< pin for RS line */
# endif
# ifndef LCD_RW_PORT
# define LCD_RW_PORT LCD_PORT /**< port for RW line */
# endif
# ifndef LCD_RW_PIN
# define LCD_RW_PIN 2 /**< pin for RW line */
# endif
# ifndef LCD_E_PORT
# define LCD_E_PORT LCD_PORT /**< port for Enable line */
# endif
# ifndef LCD_E_PIN
# define LCD_E_PIN 1 /**< pin for Enable line */
# endif
#elif defined(__AVR_AT90S4414__) || defined(__AVR_AT90S8515__) || defined(__AVR_ATmega64__) || defined(__AVR_ATmega8515__) || defined(__AVR_ATmega103__) || defined(__AVR_ATmega128__) || defined(__AVR_ATmega161__) || defined(__AVR_ATmega162__)
/*
* memory mapped mode is only supported when the device has an external data memory interface
*/
# define LCD_IO_DATA 0xC000 /* A15=E=1, A14=RS=1 */
# define LCD_IO_FUNCTION 0x8000 /* A15=E=1, A14=RS=0 */
# define LCD_IO_READ 0x0100 /* A8 =R/W=1 (R/W: 1=Read, 0=Write */
#else
# error "external data memory interface not available for this device, use 4-bit IO port mode"
#endif
/**
* @name Definitions of delays
* Used to calculate delay timers.
* Adapt the F_CPU define in the Makefile to the clock frequency in Hz of your target
*
* These delay times can be adjusted, if some displays require different delays.\n
* These definitions can be defined in a separate include file \b lcd_definitions.h instead modifying this file by
* adding \b -D_LCD_DEFINITIONS_FILE to the \b CDEFS section in the Makefile.
* All definitions added to the file lcd_definitions.h will override the default definitions from lcd.h
*/
#ifndef LCD_DELAY_BOOTUP
# define LCD_DELAY_BOOTUP 16000 /**< delay in micro seconds after power-on */
#endif
#ifndef LCD_DELAY_INIT
# define LCD_DELAY_INIT 5000 /**< delay in micro seconds after initialization command sent */
#endif
#ifndef LCD_DELAY_INIT_REP
# define LCD_DELAY_INIT_REP 64 /**< delay in micro seconds after initialization command repeated */
#endif
#ifndef LCD_DELAY_INIT_4BIT
# define LCD_DELAY_INIT_4BIT 64 /**< delay in micro seconds after setting 4-bit mode */
#endif
#ifndef LCD_DELAY_BUSY_FLAG
# define LCD_DELAY_BUSY_FLAG 4 /**< time in micro seconds the address counter is updated after busy flag is cleared */
#endif
#ifndef LCD_DELAY_ENABLE_PULSE
# define LCD_DELAY_ENABLE_PULSE 1 /**< enable signal pulse width in micro seconds */
#endif
/**
* @name Definitions for LCD command instructions
* The constants define the various LCD controller instructions which can be passed to the
* function lcd_command(), see HD44780 data sheet for a complete description.
*/
/* instruction register bit positions, see HD44780U data sheet */
#define LCD_CLR 0 /* DB0: clear display */
#define LCD_HOME 1 /* DB1: return to home position */
#define LCD_ENTRY_MODE 2 /* DB2: set entry mode */
#define LCD_ENTRY_INC 1 /* DB1: 1=increment, 0=decrement */
#define LCD_ENTRY_SHIFT 0 /* DB2: 1=display shift on */
#define LCD_ON 3 /* DB3: turn lcd/cursor on */
#define LCD_ON_DISPLAY 2 /* DB2: turn display on */
#define LCD_ON_CURSOR 1 /* DB1: turn cursor on */
#define LCD_ON_BLINK 0 /* DB0: blinking cursor ? */
#define LCD_MOVE 4 /* DB4: move cursor/display */
#define LCD_MOVE_DISP 3 /* DB3: move display (0-> cursor) ? */
#define LCD_MOVE_RIGHT 2 /* DB2: move right (0-> left) ? */
#define LCD_FUNCTION 5 /* DB5: function set */
#define LCD_FUNCTION_8BIT 4 /* DB4: set 8BIT mode (0->4BIT mode) */
#define LCD_FUNCTION_2LINES 3 /* DB3: two lines (0->one line) */
#define LCD_FUNCTION_10DOTS 2 /* DB2: 5x10 font (0->5x7 font) */
#define LCD_CGRAM 6 /* DB6: set CG RAM address */
#define LCD_DDRAM 7 /* DB7: set DD RAM address */
#define LCD_BUSY 7 /* DB7: LCD is busy */
/* set entry mode: display shift on/off, dec/inc cursor move direction */
#define LCD_ENTRY_DEC 0x04 /* display shift off, dec cursor move dir */
#define LCD_ENTRY_DEC_SHIFT 0x05 /* display shift on, dec cursor move dir */
#define LCD_ENTRY_INC_ 0x06 /* display shift off, inc cursor move dir */
#define LCD_ENTRY_INC_SHIFT 0x07 /* display shift on, inc cursor move dir */
/* display on/off, cursor on/off, blinking char at cursor position */
#define LCD_DISP_OFF 0x08 /* display off */
#define LCD_DISP_ON 0x0C /* display on, cursor off */
#define LCD_DISP_ON_BLINK 0x0D /* display on, cursor off, blink char */
#define LCD_DISP_ON_CURSOR 0x0E /* display on, cursor on */
#define LCD_DISP_ON_CURSOR_BLINK 0x0F /* display on, cursor on, blink char */
/* move cursor/shift display */
#define LCD_MOVE_CURSOR_LEFT 0x10 /* move cursor left (decrement) */
#define LCD_MOVE_CURSOR_RIGHT 0x14 /* move cursor right (increment) */
#define LCD_MOVE_DISP_LEFT 0x18 /* shift display left */
#define LCD_MOVE_DISP_RIGHT 0x1C /* shift display right */
/* function set: set interface data length and number of display lines */
#define LCD_FUNCTION_4BIT_1LINE 0x20 /* 4-bit interface, single line, 5x7 dots */
#define LCD_FUNCTION_4BIT_2LINES 0x28 /* 4-bit interface, dual line, 5x7 dots */
#define LCD_FUNCTION_8BIT_1LINE 0x30 /* 8-bit interface, single line, 5x7 dots */
#define LCD_FUNCTION_8BIT_2LINES 0x38 /* 8-bit interface, dual line, 5x7 dots */
#define LCD_MODE_DEFAULT ((1 << LCD_ENTRY_MODE) | (1 << LCD_ENTRY_INC))
/**
* @name Functions
*/
/**
@brief Initialize display and select type of cursor
@param dispAttr \b LCD_DISP_OFF display off\n
\b LCD_DISP_ON display on, cursor off\n
\b LCD_DISP_ON_CURSOR display on, cursor on\n
\b LCD_DISP_ON_CURSOR_BLINK display on, cursor on flashing
@return none
*/
extern void lcd_init(uint8_t dispAttr);
/**
@brief Clear display and set cursor to home position
@return none
*/
extern void lcd_clrscr(void);
/**
@brief Set cursor to home position
@return none
*/
extern void lcd_home(void);
/**
@brief Set cursor to specified position
@param x horizontal position\n (0: left most position)
@param y vertical position\n (0: first line)
@return none
*/
extern void lcd_gotoxy(uint8_t x, uint8_t y);
/**
@brief Display character at current cursor position
@param c character to be displayed
@return none
*/
extern void lcd_putc(char c);
/**
@brief Display string without auto linefeed
@param s string to be displayed
@return none
*/
extern void lcd_puts(const char *s);
/**
@brief Display string from program memory without auto linefeed
@param progmem_s string from program memory be be displayed
@return none
@see lcd_puts_P
*/
extern void lcd_puts_p(const char *progmem_s);
/**
@brief Send LCD controller instruction command
@param cmd instruction to send to LCD controller, see HD44780 data sheet
@return none
*/
extern void lcd_command(uint8_t cmd);
/**
@brief Send data byte to LCD controller
Similar to lcd_putc(), but without interpreting LF
@param data byte to send to LCD controller, see HD44780 data sheet
@return none
*/
extern void lcd_data(uint8_t data);
/**
@brief macros for automatically storing string constant in program memory
*/
#define lcd_puts_P(__s) lcd_puts_p(PSTR(__s))
/**@}*/

241
drivers/avr/i2c_master.c
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@ -1,241 +0,0 @@
/* Copyright (C) 2019 Elia Ritterbusch
+
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* Library made by: g4lvanix
* GitHub repository: https://github.com/g4lvanix/I2C-master-lib
*/
#include <avr/io.h>
#include <util/twi.h>
#include "i2c_master.h"
#include "timer.h"
#include "wait.h"
#ifndef F_SCL
# define F_SCL 400000UL // SCL frequency
#endif
#ifndef I2C_START_RETRY_COUNT
# define I2C_START_RETRY_COUNT 20
#endif // I2C_START_RETRY_COUNT
#define TWBR_val (((F_CPU / F_SCL) - 16) / 2)
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
void i2c_init(void) {
TWSR = 0; /* no prescaler */
TWBR = (uint8_t)TWBR_val;
#ifdef __AVR_ATmega32A__
// set pull-up resistors on I2C bus pins
PORTC |= 0b11;
// enable TWI (two-wire interface)
TWCR |= (1 << TWEN);
// enable TWI interrupt and slave address ACK
TWCR |= (1 << TWIE);
TWCR |= (1 << TWEA);
#endif
}
static i2c_status_t i2c_start_impl(uint8_t address, uint16_t timeout) {
// reset TWI control register
TWCR = 0;
// transmit START condition
TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
uint16_t timeout_timer = timer_read();
while (!(TWCR & (1 << TWINT))) {
if ((timeout != I2C_TIMEOUT_INFINITE) && ((timer_read() - timeout_timer) >= timeout)) {
return I2C_STATUS_TIMEOUT;
}
}
// check if the start condition was successfully transmitted
if (((TW_STATUS & 0xF8) != TW_START) && ((TW_STATUS & 0xF8) != TW_REP_START)) {
return I2C_STATUS_ERROR;
}
// load slave address into data register
TWDR = address;
// start transmission of address
TWCR = (1 << TWINT) | (1 << TWEN);
timeout_timer = timer_read();
while (!(TWCR & (1 << TWINT))) {
if ((timeout != I2C_TIMEOUT_INFINITE) && ((timer_read() - timeout_timer) >= timeout)) {
return I2C_STATUS_TIMEOUT;
}
}
// check if the device has acknowledged the READ / WRITE mode
uint8_t twst = TW_STATUS & 0xF8;
if ((twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK)) {
return I2C_STATUS_ERROR;
}
return I2C_STATUS_SUCCESS;
}
i2c_status_t i2c_start(uint8_t address, uint16_t timeout) {
// Retry i2c_start_impl a bunch times in case the remote side has interrupts disabled.
uint16_t timeout_timer = timer_read();
uint16_t time_slice = MAX(1, (timeout == (I2C_TIMEOUT_INFINITE)) ? 5 : (timeout / (I2C_START_RETRY_COUNT))); // if it's infinite, wait 1ms between attempts, otherwise split up the entire timeout into the number of retries
i2c_status_t status;
do {
status = i2c_start_impl(address, time_slice);
} while ((status < 0) && ((timeout == I2C_TIMEOUT_INFINITE) || (timer_elapsed(timeout_timer) < timeout)));
return status;
}
i2c_status_t i2c_write(uint8_t data, uint16_t timeout) {
// load data into data register
TWDR = data;
// start transmission of data
TWCR = (1 << TWINT) | (1 << TWEN);
uint16_t timeout_timer = timer_read();
while (!(TWCR & (1 << TWINT))) {
if ((timeout != I2C_TIMEOUT_INFINITE) && ((timer_read() - timeout_timer) >= timeout)) {
return I2C_STATUS_TIMEOUT;
}
}
if ((TW_STATUS & 0xF8) != TW_MT_DATA_ACK) {
return I2C_STATUS_ERROR;
}
return I2C_STATUS_SUCCESS;
}
int16_t i2c_read_ack(uint16_t timeout) {
// start TWI module and acknowledge data after reception
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWEA);
uint16_t timeout_timer = timer_read();
while (!(TWCR & (1 << TWINT))) {
if ((timeout != I2C_TIMEOUT_INFINITE) && ((timer_read() - timeout_timer) >= timeout)) {
return I2C_STATUS_TIMEOUT;
}
}
// return received data from TWDR
return TWDR;
}
int16_t i2c_read_nack(uint16_t timeout) {
// start receiving without acknowledging reception
TWCR = (1 << TWINT) | (1 << TWEN);
uint16_t timeout_timer = timer_read();
while (!(TWCR & (1 << TWINT))) {
if ((timeout != I2C_TIMEOUT_INFINITE) && ((timer_read() - timeout_timer) >= timeout)) {
return I2C_STATUS_TIMEOUT;
}
}
// return received data from TWDR
return TWDR;
}
i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_status_t status = i2c_start(address | I2C_WRITE, timeout);
for (uint16_t i = 0; i < length && status >= 0; i++) {
status = i2c_write(data[i], timeout);
}
i2c_stop();
return status;
}
i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_status_t status = i2c_start(address | I2C_READ, timeout);
for (uint16_t i = 0; i < (length - 1) && status >= 0; i++) {
status = i2c_read_ack(timeout);
if (status >= 0) {
data[i] = status;
}
}
if (status >= 0) {
status = i2c_read_nack(timeout);
if (status >= 0) {
data[(length - 1)] = status;
}
}
i2c_stop();
return (status < 0) ? status : I2C_STATUS_SUCCESS;
}
i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_status_t status = i2c_start(devaddr | 0x00, timeout);
if (status >= 0) {
status = i2c_write(regaddr, timeout);
for (uint16_t i = 0; i < length && status >= 0; i++) {
status = i2c_write(data[i], timeout);
}
}
i2c_stop();
return status;
}
i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_status_t status = i2c_start(devaddr, timeout);
if (status < 0) {
goto error;
}
status = i2c_write(regaddr, timeout);
if (status < 0) {
goto error;
}
status = i2c_start(devaddr | 0x01, timeout);
for (uint16_t i = 0; i < (length - 1) && status >= 0; i++) {
status = i2c_read_ack(timeout);
if (status >= 0) {
data[i] = status;
}
}
if (status >= 0) {
status = i2c_read_nack(timeout);
if (status >= 0) {
data[(length - 1)] = status;
}
}
error:
i2c_stop();
return (status < 0) ? status : I2C_STATUS_SUCCESS;
}
void i2c_stop(void) {
// transmit STOP condition
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
}

43
drivers/avr/i2c_master.h
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@ -1,43 +0,0 @@
/* Copyright (C) 2019 Elia Ritterbusch
+
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* Library made by: g4lvanix
* GitHub repository: https://github.com/g4lvanix/I2C-master-lib
*/
#pragma once
#define I2C_READ 0x01
#define I2C_WRITE 0x00
typedef int16_t i2c_status_t;
#define I2C_STATUS_SUCCESS (0)
#define I2C_STATUS_ERROR (-1)
#define I2C_STATUS_TIMEOUT (-2)
#define I2C_TIMEOUT_IMMEDIATE (0)
#define I2C_TIMEOUT_INFINITE (0xFFFF)
void i2c_init(void);
i2c_status_t i2c_start(uint8_t address, uint16_t timeout);
i2c_status_t i2c_write(uint8_t data, uint16_t timeout);
int16_t i2c_read_ack(uint16_t timeout);
int16_t i2c_read_nack(uint16_t timeout);
i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
void i2c_stop(void);

111
drivers/avr/i2c_slave.c
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@ -1,111 +0,0 @@
/* Copyright (C) 2019 Elia Ritterbusch
+
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* Library made by: g4lvanix
* GitHub repository: https://github.com/g4lvanix/I2C-slave-lib
*/
#include <stddef.h>
#include <avr/io.h>
#include <util/twi.h>
#include <avr/interrupt.h>
#include <stdbool.h>
#include "i2c_slave.h"
#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
# include "transactions.h"
static volatile bool is_callback_executor = false;
#endif // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
volatile uint8_t i2c_slave_reg[I2C_SLAVE_REG_COUNT];
static volatile uint8_t buffer_address;
static volatile bool slave_has_register_set = false;
void i2c_slave_init(uint8_t address) {
// load address into TWI address register
TWAR = address;
// set the TWCR to enable address matching and enable TWI, clear TWINT, enable TWI interrupt
TWCR = (1 << TWIE) | (1 << TWEA) | (1 << TWINT) | (1 << TWEN);
}
void i2c_slave_stop(void) {
// clear acknowledge and enable bits
TWCR &= ~((1 << TWEA) | (1 << TWEN));
}
ISR(TWI_vect) {
uint8_t ack = 1;
switch (TW_STATUS) {
case TW_SR_SLA_ACK:
// The device is now a slave receiver
slave_has_register_set = false;
#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
is_callback_executor = false;
#endif // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
break;
case TW_SR_DATA_ACK:
// This device is a slave receiver and has received data
// First byte is the location then the bytes will be writen in buffer with auto-increment
if (!slave_has_register_set) {
buffer_address = TWDR;
if (buffer_address >= I2C_SLAVE_REG_COUNT) { // address out of bounds dont ack
ack = 0;
buffer_address = 0;
}
slave_has_register_set = true; // address has been received now fill in buffer
#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
// Work out if we're attempting to execute a callback
is_callback_executor = buffer_address == split_transaction_table[I2C_EXECUTE_CALLBACK].initiator2target_offset;
#endif // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
} else {
i2c_slave_reg[buffer_address] = TWDR;
buffer_address++;
#if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
// If we're intending to execute a transaction callback, do so, as we've just received the transaction ID
if (is_callback_executor) {
split_transaction_desc_t *trans = &split_transaction_table[split_shmem->transaction_id];
if (trans->slave_callback) {
trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
}
}
#endif // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
}
break;
case TW_ST_SLA_ACK:
case TW_ST_DATA_ACK:
// This device is a slave transmitter and master has requested data
TWDR = i2c_slave_reg[buffer_address];
buffer_address++;
break;
case TW_BUS_ERROR:
// We got an error, reset i2c
TWCR = 0;
default:
break;
}
// Reset i2c state machine to be ready for next interrupt
TWCR |= (1 << TWIE) | (1 << TWINT) | (ack << TWEA) | (1 << TWEN);
}

41
drivers/avr/i2c_slave.h
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@ -1,41 +0,0 @@
/* Copyright (C) 2019 Elia Ritterbusch
+
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* Library made by: g4lvanix
* GitHub repository: https://github.com/g4lvanix/I2C-slave-lib
Info: Inititate the library by giving the required address.
Read or write to the necessary buffer according to the opperation.
*/
#pragma once
#ifndef I2C_SLAVE_REG_COUNT
# if defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
# include "transport.h"
# define I2C_SLAVE_REG_COUNT sizeof(split_shared_memory_t)
# else // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
# define I2C_SLAVE_REG_COUNT 30
# endif // defined(USE_I2C) && defined(SPLIT_COMMON_TRANSACTIONS)
#endif // I2C_SLAVE_REG_COUNT
_Static_assert(I2C_SLAVE_REG_COUNT < 256, "I2C target registers must be single byte");
extern volatile uint8_t i2c_slave_reg[I2C_SLAVE_REG_COUNT];
void i2c_slave_init(uint8_t address);
void i2c_slave_stop(void);

529
drivers/avr/serial.c
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@ -1,529 +0,0 @@
/*
* WARNING: be careful changing this code, it is very timing dependent
*
* 2018-10-28 checked
* avr-gcc 4.9.2
* avr-gcc 5.4.0
* avr-gcc 7.3.0
*/
#ifndef F_CPU
# define F_CPU 16000000
#endif
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stddef.h>
#include <stdbool.h>
#include "serial.h"
#ifdef SOFT_SERIAL_PIN
# if !(defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
# error serial.c is not supported for the currently selected MCU
# endif
// if using ATmega32U4/2, AT90USBxxx I2C, can not use PD0 and PD1 in soft serial.
# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
# if defined(USE_AVR_I2C) && (SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1)
# error Using I2C, so can not use PD0, PD1
# endif
# endif
// PD0..PD3, common config
# if SOFT_SERIAL_PIN == D0
# define EIMSK_BIT _BV(INT0)
# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
# define SERIAL_PIN_INTERRUPT INT0_vect
# define EICRx EICRA
# elif SOFT_SERIAL_PIN == D1
# define EIMSK_BIT _BV(INT1)
# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
# define SERIAL_PIN_INTERRUPT INT1_vect
# define EICRx EICRA
# elif SOFT_SERIAL_PIN == D2
# define EIMSK_BIT _BV(INT2)
# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
# define SERIAL_PIN_INTERRUPT INT2_vect
# define EICRx EICRA
# elif SOFT_SERIAL_PIN == D3
# define EIMSK_BIT _BV(INT3)
# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
# define SERIAL_PIN_INTERRUPT INT3_vect
# define EICRx EICRA
# endif
// ATmegaxxU2/AT90USB162 specific config
# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_AT90USB162__)
// PD4(INT5), PD6(INT6), PD7(INT7), PC7(INT4)
# if SOFT_SERIAL_PIN == D4
# define EIMSK_BIT _BV(INT5)
# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51)))
# define SERIAL_PIN_INTERRUPT INT5_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == D6
# define EIMSK_BIT _BV(INT6)
# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
# define SERIAL_PIN_INTERRUPT INT6_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == D7
# define EIMSK_BIT _BV(INT7)
# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71)))
# define SERIAL_PIN_INTERRUPT INT7_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == C7
# define EIMSK_BIT _BV(INT4)
# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41)))
# define SERIAL_PIN_INTERRUPT INT4_vect
# define EICRx EICRB
# endif
# endif
// ATmegaxxU4 specific config
# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
// PE6(INT6)
# if SOFT_SERIAL_PIN == E6
# define EIMSK_BIT _BV(INT6)
# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
# define SERIAL_PIN_INTERRUPT INT6_vect
# define EICRx EICRB
# endif
# endif
// AT90USBxxx specific config
# if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
// PE4..PE7(INT4..INT7)
# if SOFT_SERIAL_PIN == E4
# define EIMSK_BIT _BV(INT4)
# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41)))
# define SERIAL_PIN_INTERRUPT INT4_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == E5
# define EIMSK_BIT _BV(INT5)
# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51)))
# define SERIAL_PIN_INTERRUPT INT5_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == E6
# define EIMSK_BIT _BV(INT6)
# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
# define SERIAL_PIN_INTERRUPT INT6_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == E7
# define EIMSK_BIT _BV(INT7)
# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71)))
# define SERIAL_PIN_INTERRUPT INT7_vect
# define EICRx EICRB
# endif
# endif
# ifndef SERIAL_PIN_INTERRUPT
# error invalid SOFT_SERIAL_PIN value
# endif
# define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
# define setPinOutput(pin) (DDRx_ADDRESS(pin) |= _BV((pin)&0xF))
# define writePinHigh(pin) (PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
# define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
# define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))
# define ALWAYS_INLINE __attribute__((always_inline))
# define NO_INLINE __attribute__((noinline))
# define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
// parity check
# define ODD_PARITY 1
# define EVEN_PARITY 0
# define PARITY EVEN_PARITY
# ifdef SERIAL_DELAY
// custom setup in config.h
// #define TID_SEND_ADJUST 2
// #define SERIAL_DELAY 6 // micro sec
// #define READ_WRITE_START_ADJUST 30 // cycles
// #define READ_WRITE_WIDTH_ADJUST 8 // cycles
# else
// ============ Standard setups ============
# ifndef SELECT_SOFT_SERIAL_SPEED
# define SELECT_SOFT_SERIAL_SPEED 1
// 0: about 189kbps (Experimental only)
// 1: about 137kbps (default)
// 2: about 75kbps
// 3: about 39kbps
// 4: about 26kbps
// 5: about 20kbps
# endif
# if __GNUC__ < 6
# define TID_SEND_ADJUST 14
# else
# define TID_SEND_ADJUST 2
# endif
# if SELECT_SOFT_SERIAL_SPEED == 0
// Very High speed
# define SERIAL_DELAY 4 // micro sec
# if __GNUC__ < 6
# define READ_WRITE_START_ADJUST 33 // cycles
# define READ_WRITE_WIDTH_ADJUST 3 // cycles
# else
# define READ_WRITE_START_ADJUST 34 // cycles
# define READ_WRITE_WIDTH_ADJUST 7 // cycles
# endif
# elif SELECT_SOFT_SERIAL_SPEED == 1
// High speed
# define SERIAL_DELAY 6 // micro sec
# if __GNUC__ < 6
# define READ_WRITE_START_ADJUST 30 // cycles
# define READ_WRITE_WIDTH_ADJUST 3 // cycles
# else
# define READ_WRITE_START_ADJUST 33 // cycles
# define READ_WRITE_WIDTH_ADJUST 7 // cycles
# endif
# elif SELECT_SOFT_SERIAL_SPEED == 2
// Middle speed
# define SERIAL_DELAY 12 // micro sec
# define READ_WRITE_START_ADJUST 30 // cycles
# if __GNUC__ < 6
# define READ_WRITE_WIDTH_ADJUST 3 // cycles
# else
# define READ_WRITE_WIDTH_ADJUST 7 // cycles
# endif
# elif SELECT_SOFT_SERIAL_SPEED == 3
// Low speed
# define SERIAL_DELAY 24 // micro sec
# define READ_WRITE_START_ADJUST 30 // cycles
# if __GNUC__ < 6
# define READ_WRITE_WIDTH_ADJUST 3 // cycles
# else
# define READ_WRITE_WIDTH_ADJUST 7 // cycles
# endif
# elif SELECT_SOFT_SERIAL_SPEED == 4
// Very Low speed
# define SERIAL_DELAY 36 // micro sec
# define READ_WRITE_START_ADJUST 30 // cycles
# if __GNUC__ < 6
# define READ_WRITE_WIDTH_ADJUST 3 // cycles
# else
# define READ_WRITE_WIDTH_ADJUST 7 // cycles
# endif
# elif SELECT_SOFT_SERIAL_SPEED == 5
// Ultra Low speed
# define SERIAL_DELAY 48 // micro sec
# define READ_WRITE_START_ADJUST 30 // cycles
# if __GNUC__ < 6
# define READ_WRITE_WIDTH_ADJUST 3 // cycles
# else
# define READ_WRITE_WIDTH_ADJUST 7 // cycles
# endif
# else
# error invalid SELECT_SOFT_SERIAL_SPEED value
# endif /* SELECT_SOFT_SERIAL_SPEED */
# endif /* SERIAL_DELAY */
# define SERIAL_DELAY_HALF1 (SERIAL_DELAY / 2)
# define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY / 2)
# define SLAVE_INT_WIDTH_US 1
# define SLAVE_INT_ACK_WIDTH_UNIT 2
# define SLAVE_INT_ACK_WIDTH 4
inline static void serial_delay(void) ALWAYS_INLINE;
inline static void serial_delay(void) { _delay_us(SERIAL_DELAY); }
inline static void serial_delay_half1(void) ALWAYS_INLINE;
inline static void serial_delay_half1(void) { _delay_us(SERIAL_DELAY_HALF1); }
inline static void serial_delay_half2(void) ALWAYS_INLINE;
inline static void serial_delay_half2(void) { _delay_us(SERIAL_DELAY_HALF2); }
inline static void serial_output(void) ALWAYS_INLINE;
inline static void serial_output(void) { setPinOutput(SOFT_SERIAL_PIN); }
// make the serial pin an input with pull-up resistor
inline static void serial_input_with_pullup(void) ALWAYS_INLINE;
inline static void serial_input_with_pullup(void) { setPinInputHigh(SOFT_SERIAL_PIN); }
inline static uint8_t serial_read_pin(void) ALWAYS_INLINE;
inline static uint8_t serial_read_pin(void) { return !!readPin(SOFT_SERIAL_PIN); }
inline static void serial_low(void) ALWAYS_INLINE;
inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
inline static void serial_high(void) ALWAYS_INLINE;
inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
void soft_serial_initiator_init(void) {
serial_output();
serial_high();
}
void soft_serial_target_init(void) {
serial_input_with_pullup();
// Enable INT0-INT7
EIMSK |= EIMSK_BIT;
EICRx &= EICRx_BIT;
}
// Used by the sender to synchronize timing with the reciver.
static void sync_recv(void) NO_INLINE;
static void sync_recv(void) {
for (uint8_t i = 0; i < SERIAL_DELAY * 5 && serial_read_pin(); i++) {
}
// This shouldn't hang if the target disconnects because the
// serial line will float to high if the target does disconnect.
while (!serial_read_pin())
;
}
// Used by the reciver to send a synchronization signal to the sender.
static void sync_send(void) NO_INLINE;
static void sync_send(void) {
serial_low();
serial_delay();
serial_high();
}
// Reads a byte from the serial line
static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) NO_INLINE;
static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
uint8_t byte, i, p, pb;
_delay_sub_us(READ_WRITE_START_ADJUST);
for (i = 0, byte = 0, p = PARITY; i < bit; i++) {
serial_delay_half1(); // read the middle of pulses
if (serial_read_pin()) {
byte = (byte << 1) | 1;
p ^= 1;
} else {
byte = (byte << 1) | 0;
p ^= 0;
}
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
serial_delay_half2();
}
/* recive parity bit */
serial_delay_half1(); // read the middle of pulses
pb = serial_read_pin();
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
serial_delay_half2();
*pterrcount += (p != pb) ? 1 : 0;
return byte;
}
// Sends a byte with MSB ordering
void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
void serial_write_chunk(uint8_t data, uint8_t bit) {
uint8_t b, p;
for (p = PARITY, b = 1 << (bit - 1); b; b >>= 1) {
if (data & b) {
serial_high();
p ^= 1;
} else {
serial_low();
p ^= 0;
}
serial_delay();
}
/* send parity bit */
if (p & 1) {
serial_high();
} else {
serial_low();
}
serial_delay();
serial_low(); // sync_send() / senc_recv() need raise edge
}
static void serial_send_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
static void serial_send_packet(uint8_t *buffer, uint8_t size) {
for (uint8_t i = 0; i < size; ++i) {
uint8_t data;
data = buffer[i];
sync_send();
serial_write_chunk(data, 8);
}
}
static uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
static uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) {
uint8_t pecount = 0;
for (uint8_t i = 0; i < size; ++i) {
uint8_t data;
sync_recv();
data = serial_read_chunk(&pecount, 8);
buffer[i] = data;
}
return pecount == 0;
}
inline static void change_sender2reciver(void) {
sync_send(); // 0
serial_delay_half1(); // 1
serial_low(); // 2
serial_input_with_pullup(); // 2
serial_delay_half1(); // 3
}
inline static void change_reciver2sender(void) {
sync_recv(); // 0
serial_delay(); // 1
serial_low(); // 3
serial_output(); // 3
serial_delay_half1(); // 4
}
static inline uint8_t nibble_bits_count(uint8_t bits) {
bits = (bits & 0x5) + (bits >> 1 & 0x5);
bits = (bits & 0x3) + (bits >> 2 & 0x3);
return bits;
}
// interrupt handle to be used by the target device
ISR(SERIAL_PIN_INTERRUPT) {
// recive transaction table index
uint8_t tid, bits;
uint8_t pecount = 0;
sync_recv();
bits = serial_read_chunk(&pecount, 8);
tid = bits >> 3;
bits = (bits & 7) != (nibble_bits_count(tid) & 7);
if (bits || pecount > 0 || tid > NUM_TOTAL_TRANSACTIONS) {
return;
}
serial_delay_half1();
serial_high(); // response step1 low->high
serial_output();
_delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT * SLAVE_INT_ACK_WIDTH);
split_transaction_desc_t *trans = &split_transaction_table[tid];
serial_low(); // response step2 ack high->low
// If the transaction has a callback, we can execute it now
if (trans->slave_callback) {
trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
}
// target send phase
if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size);
// target switch to input
change_sender2reciver();
// target recive phase
if (trans->initiator2target_buffer_size > 0) {
if (serial_recive_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
*trans->status = TRANSACTION_ACCEPTED;
} else {
*trans->status = TRANSACTION_DATA_ERROR;
}
} else {
*trans->status = TRANSACTION_ACCEPTED;
}
sync_recv(); // weit initiator output to high
}
/////////
// start transaction by initiator
//
// int soft_serial_transaction(int sstd_index)
//
// Returns:
// TRANSACTION_END
// TRANSACTION_NO_RESPONSE
// TRANSACTION_DATA_ERROR
// this code is very time dependent, so we need to disable interrupts
int soft_serial_transaction(int sstd_index) {
if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
if (!trans->status) return TRANSACTION_TYPE_ERROR; // not registered
cli();
// signal to the target that we want to start a transaction
serial_output();
serial_low();
_delay_us(SLAVE_INT_WIDTH_US);
// send transaction table index
int tid = (sstd_index << 3) | (7 & nibble_bits_count(sstd_index));
sync_send();
_delay_sub_us(TID_SEND_ADJUST);
serial_write_chunk(tid, 8);
serial_delay_half1();
// wait for the target response (step1 low->high)
serial_input_with_pullup();
while (!serial_read_pin()) {
_delay_sub_us(2);
}
// check if the target is present (step2 high->low)
for (int i = 0; serial_read_pin(); i++) {
if (i > SLAVE_INT_ACK_WIDTH + 1) {
// slave failed to pull the line low, assume not present
serial_output();
serial_high();
*trans->status = TRANSACTION_NO_RESPONSE;
sei();
return TRANSACTION_NO_RESPONSE;
}
_delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
}
// initiator recive phase
// if the target is present syncronize with it
if (trans->target2initiator_buffer_size > 0) {
if (!serial_recive_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
serial_output();
serial_high();
*trans->status = TRANSACTION_DATA_ERROR;
sei();
return TRANSACTION_DATA_ERROR;
}
}
// initiator switch to output
change_reciver2sender();
// initiator send phase
if (trans->initiator2target_buffer_size > 0) {
serial_send_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size);
}
// always, release the line when not in use
sync_send();
*trans->status = TRANSACTION_END;
sei();
return TRANSACTION_END;
}
int soft_serial_get_and_clean_status(int sstd_index) {
split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
cli();
int retval = *trans->status;
*trans->status = 0;
;
sei();
return retval;
}
#endif
// Helix serial.c history
// 2018-1-29 fork from let's split and add PD2, modify sync_recv() (#2308, bceffdefc)
// 2018-6-28 bug fix master to slave comm and speed up (#3255, 1038bbef4)
// (adjusted with avr-gcc 4.9.2)
// 2018-7-13 remove USE_SERIAL_PD2 macro (#3374, f30d6dd78)
// (adjusted with avr-gcc 4.9.2)
// 2018-8-11 add support multi-type transaction (#3608, feb5e4aae)
// (adjusted with avr-gcc 4.9.2)
// 2018-10-21 fix serial and RGB animation conflict (#4191, 4665e4fff)
// (adjusted with avr-gcc 7.3.0)
// 2018-10-28 re-adjust compiler depend value of delay (#4269, 8517f8a66)
// (adjusted with avr-gcc 5.4.0, 7.3.0)
// 2018-12-17 copy to TOP/quantum/split_common/ and remove backward compatibility code (#4669)

180
drivers/avr/spi_master.c
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@ -1,180 +0,0 @@
/* Copyright 2020
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "spi_master.h"
#include "timer.h"
#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
# define SPI_SCK_PIN B1
# define SPI_MOSI_PIN B2
# define SPI_MISO_PIN B3
#elif defined(__AVR_ATmega32A__)
# define SPI_SCK_PIN B7
# define SPI_MOSI_PIN B5
# define SPI_MISO_PIN B6
#elif defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
# define SPI_SCK_PIN B5
# define SPI_MOSI_PIN B3
# define SPI_MISO_PIN B4
#endif
#ifndef SPI_TIMEOUT
# define SPI_TIMEOUT 100
#endif
static pin_t currentSlavePin = NO_PIN;
static uint8_t currentSlaveConfig = 0;
static bool currentSlave2X = false;
void spi_init(void) {
writePinHigh(SPI_SS_PIN);
setPinOutput(SPI_SCK_PIN);
setPinOutput(SPI_MOSI_PIN);
setPinInput(SPI_MISO_PIN);
SPCR = (_BV(SPE) | _BV(MSTR));
}
bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
if (currentSlavePin != NO_PIN || slavePin == NO_PIN) {
return false;
}
currentSlaveConfig = 0;
if (lsbFirst) {
currentSlaveConfig |= _BV(DORD);
}
switch (mode) {
case 1:
currentSlaveConfig |= _BV(CPHA);
break;
case 2:
currentSlaveConfig |= _BV(CPOL);
break;
case 3:
currentSlaveConfig |= (_BV(CPOL) | _BV(CPHA));
break;
}
uint16_t roundedDivisor = 1;
while (roundedDivisor < divisor) {
roundedDivisor <<= 1;
}
switch (roundedDivisor) {
case 16:
currentSlaveConfig |= _BV(SPR0);
break;
case 64:
currentSlaveConfig |= _BV(SPR1);
break;
case 128:
currentSlaveConfig |= (_BV(SPR1) | _BV(SPR0));
break;
case 2:
currentSlave2X = true;
break;
case 8:
currentSlave2X = true;
currentSlaveConfig |= _BV(SPR0);
break;
case 32:
currentSlave2X = true;
currentSlaveConfig |= _BV(SPR1);
break;
}
SPCR |= currentSlaveConfig;
if (currentSlave2X) {
SPSR |= _BV(SPI2X);
}
currentSlavePin = slavePin;
setPinOutput(currentSlavePin);
writePinLow(currentSlavePin);
return true;
}
spi_status_t spi_write(uint8_t data) {
SPDR = data;
uint16_t timeout_timer = timer_read();
while (!(SPSR & _BV(SPIF))) {
if ((timer_read() - timeout_timer) >= SPI_TIMEOUT) {
return SPI_STATUS_TIMEOUT;
}
}
return SPDR;
}
spi_status_t spi_read() {
SPDR = 0x00; // Dummy
uint16_t timeout_timer = timer_read();
while (!(SPSR & _BV(SPIF))) {
if ((timer_read() - timeout_timer) >= SPI_TIMEOUT) {
return SPI_STATUS_TIMEOUT;
}
}
return SPDR;
}
spi_status_t spi_transmit(const uint8_t *data, uint16_t length) {
spi_status_t status;
for (uint16_t i = 0; i < length; i++) {
status = spi_write(data[i]);
if (status < 0) {
return status;
}
}
return SPI_STATUS_SUCCESS;
}
spi_status_t spi_receive(uint8_t *data, uint16_t length) {
spi_status_t status;
for (uint16_t i = 0; i < length; i++) {
status = spi_read();
if (status >= 0) {
data[i] = status;
} else {
return status;
}
}
return SPI_STATUS_SUCCESS;
}
void spi_stop(void) {
if (currentSlavePin != NO_PIN) {
setPinOutput(currentSlavePin);
writePinHigh(currentSlavePin);
currentSlavePin = NO_PIN;
SPSR &= ~(_BV(SPI2X));
SPCR &= ~(currentSlaveConfig);
currentSlaveConfig = 0;
currentSlave2X = false;
}
}

59
drivers/avr/spi_master.h
View file

@ -1,59 +0,0 @@
/* Copyright 2020
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdbool.h>
#include "gpio.h"
typedef int16_t spi_status_t;
// Hardware SS pin is defined in the header so that user code can refer to it
#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
# define SPI_SS_PIN B0
#elif defined(__AVR_ATmega32A__)
# define SPI_SS_PIN B4
#elif defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
# define SPI_SS_PIN B2
#endif
#define SPI_STATUS_SUCCESS (0)
#define SPI_STATUS_ERROR (-1)
#define SPI_STATUS_TIMEOUT (-2)
#define SPI_TIMEOUT_IMMEDIATE (0)
#define SPI_TIMEOUT_INFINITE (0xFFFF)
#ifdef __cplusplus
extern "C" {
#endif
void spi_init(void);
bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor);
spi_status_t spi_write(uint8_t data);
spi_status_t spi_read(void);
spi_status_t spi_transmit(const uint8_t *data, uint16_t length);
spi_status_t spi_receive(uint8_t *data, uint16_t length);
void spi_stop(void);
#ifdef __cplusplus
}
#endif

319
drivers/avr/ssd1306.c
View file

@ -1,319 +0,0 @@
#ifdef SSD1306OLED
# include "ssd1306.h"
# include "i2c.h"
# include <string.h>
# include "print.h"
# include "glcdfont.c"
# ifdef PROTOCOL_LUFA
# include "lufa.h"
# endif
# include "sendchar.h"
# include "timer.h"
struct CharacterMatrix display;
// Set this to 1 to help diagnose early startup problems
// when testing power-on with ble. Turn it off otherwise,
// as the latency of printing most of the debug info messes
// with the matrix scan, causing keys to drop.
# define DEBUG_TO_SCREEN 0
// static uint16_t last_battery_update;
// static uint32_t vbat;
//#define BatteryUpdateInterval 10000 /* milliseconds */
# define ScreenOffInterval 300000 /* milliseconds */
# if DEBUG_TO_SCREEN
static uint8_t displaying;
# endif
static uint16_t last_flush;
// Write command sequence.
// Returns true on success.
static inline bool _send_cmd1(uint8_t cmd) {
bool res = false;
if (i2c_start_write(SSD1306_ADDRESS)) {
xprintf("failed to start write to %d\n", SSD1306_ADDRESS);
goto done;
}
if (i2c_master_write(0x0 /* command byte follows */)) {
print("failed to write control byte\n");
goto done;
}
if (i2c_master_write(cmd)) {
xprintf("failed to write command %d\n", cmd);
goto done;
}
res = true;
done:
i2c_master_stop();
return res;
}
// Write 2-byte command sequence.
// Returns true on success
static inline bool _send_cmd2(uint8_t cmd, uint8_t opr) {
if (!_send_cmd1(cmd)) {
return false;
}
return _send_cmd1(opr);
}
// Write 3-byte command sequence.
// Returns true on success
static inline bool _send_cmd3(uint8_t cmd, uint8_t opr1, uint8_t opr2) {
if (!_send_cmd1(cmd)) {
return false;
}
if (!_send_cmd1(opr1)) {
return false;
}
return _send_cmd1(opr2);
}
# define send_cmd1(c) \
if (!_send_cmd1(c)) { \
goto done; \
}
# define send_cmd2(c, o) \
if (!_send_cmd2(c, o)) { \
goto done; \
}
# define send_cmd3(c, o1, o2) \
if (!_send_cmd3(c, o1, o2)) { \
goto done; \
}
static void clear_display(void) {
matrix_clear(&display);
// Clear all of the display bits (there can be random noise
// in the RAM on startup)
send_cmd3(PageAddr, 0, (DisplayHeight / 8) - 1);
send_cmd3(ColumnAddr, 0, DisplayWidth - 1);
if (i2c_start_write(SSD1306_ADDRESS)) {
goto done;
}
if (i2c_master_write(0x40)) {
// Data mode
goto done;
}
for (uint8_t row = 0; row < MatrixRows; ++row) {
for (uint8_t col = 0; col < DisplayWidth; ++col) {
i2c_master_write(0);
}
}
display.dirty = false;
done:
i2c_master_stop();
}
# if DEBUG_TO_SCREEN
# undef sendchar
static int8_t capture_sendchar(uint8_t c) {
sendchar(c);
iota_gfx_write_char(c);
if (!displaying) {
iota_gfx_flush();
}
return 0;
}
# endif
bool iota_gfx_init(void) {
bool success = false;
send_cmd1(DisplayOff);
send_cmd2(SetDisplayClockDiv, 0x80);
send_cmd2(SetMultiPlex, DisplayHeight - 1);
send_cmd2(SetDisplayOffset, 0);
send_cmd1(SetStartLine | 0x0);
send_cmd2(SetChargePump, 0x14 /* Enable */);
send_cmd2(SetMemoryMode, 0 /* horizontal addressing */);
# ifdef OLED_ROTATE180
// the following Flip the display orientation 180 degrees
send_cmd1(SegRemap);
send_cmd1(ComScanInc);
# endif
# ifndef OLED_ROTATE180
// Flips the display orientation 0 degrees
send_cmd1(SegRemap | 0x1);
send_cmd1(ComScanDec);
# endif
send_cmd2(SetComPins, 0x2);
send_cmd2(SetContrast, 0x8f);
send_cmd2(SetPreCharge, 0xf1);
send_cmd2(SetVComDetect, 0x40);
send_cmd1(DisplayAllOnResume);
send_cmd1(NormalDisplay);
send_cmd1(DeActivateScroll);
send_cmd1(DisplayOn);
send_cmd2(SetContrast, 0); // Dim
clear_display();
success = true;
iota_gfx_flush();
# if DEBUG_TO_SCREEN
print_set_sendchar(capture_sendchar);
# endif
done:
return success;
}
bool iota_gfx_off(void) {
bool success = false;
send_cmd1(DisplayOff);
success = true;
done:
return success;
}
bool iota_gfx_on(void) {
bool success = false;
send_cmd1(DisplayOn);
success = true;
done:
return success;
}
void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c) {
*matrix->cursor = c;
++matrix->cursor;
if (matrix->cursor - &matrix->display[0][0] == sizeof(matrix->display)) {
// We went off the end; scroll the display upwards by one line
memmove(&matrix->display[0], &matrix->display[1], MatrixCols * (MatrixRows - 1));
matrix->cursor = &matrix->display[MatrixRows - 1][0];
memset(matrix->cursor, ' ', MatrixCols);
}
}
void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c) {
matrix->dirty = true;
if (c == '\n') {
// Clear to end of line from the cursor and then move to the
// start of the next line
uint8_t cursor_col = (matrix->cursor - &matrix->display[0][0]) % MatrixCols;
while (cursor_col++ < MatrixCols) {
matrix_write_char_inner(matrix, ' ');
}
return;
}
matrix_write_char_inner(matrix, c);
}
void iota_gfx_write_char(uint8_t c) { matrix_write_char(&display, c); }
void matrix_write(struct CharacterMatrix *matrix, const char *data) {
const char *end = data + strlen(data);
while (data < end) {
matrix_write_char(matrix, *data);
++data;
}
}
void iota_gfx_write(const char *data) { matrix_write(&display, data); }
void matrix_write_P(struct CharacterMatrix *matrix, const char *data) {
while (true) {
uint8_t c = pgm_read_byte(data);
if (c == 0) {
return;
}
matrix_write_char(matrix, c);
++data;
}
}
void iota_gfx_write_P(const char *data) { matrix_write_P(&display, data); }
void matrix_clear(struct CharacterMatrix *matrix) {
memset(matrix->display, ' ', sizeof(matrix->display));
matrix->cursor = &matrix->display[0][0];
matrix->dirty = true;
}
void iota_gfx_clear_screen(void) { matrix_clear(&display); }
void matrix_render(struct CharacterMatrix *matrix) {
last_flush = timer_read();
iota_gfx_on();
# if DEBUG_TO_SCREEN
++displaying;
# endif
// Move to the home position
send_cmd3(PageAddr, 0, MatrixRows - 1);
send_cmd3(ColumnAddr, 0, (MatrixCols * FontWidth) - 1);
if (i2c_start_write(SSD1306_ADDRESS)) {
goto done;
}
if (i2c_master_write(0x40)) {
// Data mode
goto done;
}
for (uint8_t row = 0; row < MatrixRows; ++row) {
for (uint8_t col = 0; col < MatrixCols; ++col) {
const uint8_t *glyph = font + (matrix->display[row][col] * (FontWidth - 1));
for (uint8_t glyphCol = 0; glyphCol < FontWidth - 1; ++glyphCol) {
uint8_t colBits = pgm_read_byte(glyph + glyphCol);
i2c_master_write(colBits);
}
// 1 column of space between chars (it's not included in the glyph)
i2c_master_write(0);
}
}
matrix->dirty = false;
done:
i2c_master_stop();
# if DEBUG_TO_SCREEN
--displaying;
# endif
}
void iota_gfx_flush(void) { matrix_render(&display); }
__attribute__((weak)) void iota_gfx_task_user(void) {}
void iota_gfx_task(void) {
iota_gfx_task_user();
if (display.dirty) {
iota_gfx_flush();
}
if (timer_elapsed(last_flush) > ScreenOffInterval) {
iota_gfx_off();
}
}
#endif

87
drivers/avr/ssd1306.h
View file

@ -1,87 +0,0 @@
#pragma once
#include <stdbool.h>
#include <stdio.h>
#include "config.h"
enum ssd1306_cmds {
DisplayOff = 0xAE,
DisplayOn = 0xAF,
SetContrast = 0x81,
DisplayAllOnResume = 0xA4,
DisplayAllOn = 0xA5,
NormalDisplay = 0xA6,
InvertDisplay = 0xA7,
SetDisplayOffset = 0xD3,
SetComPins = 0xda,
SetVComDetect = 0xdb,
SetDisplayClockDiv = 0xD5,
SetPreCharge = 0xd9,
SetMultiPlex = 0xa8,
SetLowColumn = 0x00,
SetHighColumn = 0x10,
SetStartLine = 0x40,
SetMemoryMode = 0x20,
ColumnAddr = 0x21,
PageAddr = 0x22,
ComScanInc = 0xc0,
ComScanDec = 0xc8,
SegRemap = 0xa0,
SetChargePump = 0x8d,
ExternalVcc = 0x01,
SwitchCapVcc = 0x02,
ActivateScroll = 0x2f,
DeActivateScroll = 0x2e,
SetVerticalScrollArea = 0xa3,
RightHorizontalScroll = 0x26,
LeftHorizontalScroll = 0x27,
VerticalAndRightHorizontalScroll = 0x29,
VerticalAndLeftHorizontalScroll = 0x2a,
};
// Controls the SSD1306 128x32 OLED display via i2c
#ifndef SSD1306_ADDRESS
# define SSD1306_ADDRESS 0x3C
#endif
#define DisplayHeight 32
#define DisplayWidth 128
#define FontHeight 8
#define FontWidth 6
#define MatrixRows (DisplayHeight / FontHeight)
#define MatrixCols (DisplayWidth / FontWidth)
struct CharacterMatrix {
uint8_t display[MatrixRows][MatrixCols];
uint8_t *cursor;
bool dirty;
};
extern struct CharacterMatrix display;
bool iota_gfx_init(void);
void iota_gfx_task(void);
bool iota_gfx_off(void);
bool iota_gfx_on(void);
void iota_gfx_flush(void);
void iota_gfx_write_char(uint8_t c);
void iota_gfx_write(const char *data);
void iota_gfx_write_P(const char *data);
void iota_gfx_clear_screen(void);
void iota_gfx_task_user(void);
void matrix_clear(struct CharacterMatrix *matrix);
void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c);
void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c);
void matrix_write(struct CharacterMatrix *matrix, const char *data);
void matrix_write_P(struct CharacterMatrix *matrix, const char *data);
void matrix_render(struct CharacterMatrix *matrix);

170
drivers/avr/uart.c
View file

@ -1,170 +0,0 @@
/* UART Example for Teensy USB Development Board
* http://www.pjrc.com/teensy/
* Copyright (c) 2009 PJRC.COM, LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Version 1.0: Initial Release
// Version 1.1: Add support for Teensy 2.0, minor optimizations
#include <avr/io.h>
#include <avr/interrupt.h>
#include "uart.h"
#if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
# define UDRn UDR1
# define UBRRnL UBRR1L
# define UCSRnA UCSR1A
# define UCSRnB UCSR1B
# define UCSRnC UCSR1C
# define U2Xn U2X1
# define RXENn RXEN1
# define TXENn TXEN1
# define RXCIEn RXCIE1
# define UCSZn1 UCSZ11
# define UCSZn0 UCSZ10
# define UDRIEn UDRIE1
# define USARTn_UDRE_vect USART1_UDRE_vect
# define USARTn_RX_vect USART1_RX_vect
#elif defined(__AVR_ATmega32A__)
# define UDRn UDR
# define UBRRnL UBRRL
# define UCSRnA UCSRA
# define UCSRnB UCSRB
# define UCSRnC UCSRC
# define U2Xn U2X
# define RXENn RXEN
# define TXENn TXEN
# define RXCIEn RXCIE
# define UCSZn1 UCSZ1
# define UCSZn0 UCSZ0
# define UDRIEn UDRIE
# define USARTn_UDRE_vect USART_UDRE_vect
# define USARTn_RX_vect USART_RX_vect
#elif defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__)
# define UDRn UDR0
# define UBRRnL UBRR0L
# define UCSRnA UCSR0A
# define UCSRnB UCSR0B
# define UCSRnC UCSR0C
# define U2Xn U2X0
# define RXENn RXEN0
# define TXENn TXEN0
# define RXCIEn RXCIE0
# define UCSZn1 UCSZ01
# define UCSZn0 UCSZ00
# define UDRIEn UDRIE0
# define USARTn_UDRE_vect USART_UDRE_vect
# define USARTn_RX_vect USART_RX_vect
#endif
// These buffers may be any size from 2 to 256 bytes.
#define RX_BUFFER_SIZE 64
#define TX_BUFFER_SIZE 256
static volatile uint8_t tx_buffer[TX_BUFFER_SIZE];
static volatile uint8_t tx_buffer_head;
static volatile uint8_t tx_buffer_tail;
static volatile uint8_t rx_buffer[RX_BUFFER_SIZE];
static volatile uint8_t rx_buffer_head;
static volatile uint8_t rx_buffer_tail;
// Initialize the UART
void uart_init(uint32_t baud) {
cli();
UBRRnL = (F_CPU / 4 / baud - 1) / 2;
UCSRnA = (1 << U2Xn);
UCSRnB = (1 << RXENn) | (1 << TXENn) | (1 << RXCIEn);
UCSRnC = (1 << UCSZn1) | (1 << UCSZn0);
tx_buffer_head = tx_buffer_tail = 0;
rx_buffer_head = rx_buffer_tail = 0;
sei();
}
// Transmit a byte
void uart_putchar(uint8_t c) {
uint8_t i;
i = tx_buffer_head + 1;
if (i >= TX_BUFFER_SIZE) i = 0;
// return immediately to avoid deadlock when interrupt is disabled(called from ISR)
if (tx_buffer_tail == i && (SREG & (1 << SREG_I)) == 0) return;
while (tx_buffer_tail == i)
; // wait until space in buffer
// cli();
tx_buffer[i] = c;
tx_buffer_head = i;
UCSRnB = (1 << RXENn) | (1 << TXENn) | (1 << RXCIEn) | (1 << UDRIEn);
// sei();
}
// Receive a byte
uint8_t uart_getchar(void) {
uint8_t c, i;
while (rx_buffer_head == rx_buffer_tail)
; // wait for character
i = rx_buffer_tail + 1;
if (i >= RX_BUFFER_SIZE) i = 0;
c = rx_buffer[i];
rx_buffer_tail = i;
return c;
}
// Return whether the number of bytes waiting in the receive buffer is nonzero.
// Call this before uart_getchar() to check if it will need
// to wait for a byte to arrive.
bool uart_available(void) {
uint8_t head, tail;
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return (head - tail) > 0;
return (RX_BUFFER_SIZE + head - tail) > 0;
}
// Transmit Interrupt
ISR(USARTn_UDRE_vect) {
uint8_t i;
if (tx_buffer_head == tx_buffer_tail) {
// buffer is empty, disable transmit interrupt
UCSRnB = (1 << RXENn) | (1 << TXENn) | (1 << RXCIEn);
} else {
i = tx_buffer_tail + 1;
if (i >= TX_BUFFER_SIZE) i = 0;
UDRn = tx_buffer[i];
tx_buffer_tail = i;
}
}
// Receive Interrupt
ISR(USARTn_RX_vect) {
uint8_t c, i;
c = UDRn;
i = rx_buffer_head + 1;
if (i >= RX_BUFFER_SIZE) i = 0;
if (i != rx_buffer_tail) {
rx_buffer[i] = c;
rx_buffer_head = i;
}
}

35
drivers/avr/uart.h
View file

@ -1,35 +0,0 @@
/* UART Example for Teensy USB Development Board
* http://www.pjrc.com/teensy/
* Copyright (c) 2009 PJRC.COM, LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
void uart_init(uint32_t baud);
void uart_putchar(uint8_t c);
uint8_t uart_getchar(void);
bool uart_available(void);

176
drivers/avr/ws2812.c
View file

@ -1,176 +0,0 @@
/*
* light weight WS2812 lib V2.0b
*
* Controls WS2811/WS2812/WS2812B RGB-LEDs
* Author: Tim (cpldcpu@gmail.com)
*
* Jan 18th, 2014 v2.0b Initial Version
* Nov 29th, 2015 v2.3 Added SK6812RGBW support
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ws2812.h"
#include <avr/interrupt.h>
#include <avr/io.h>
#include <util/delay.h>
#define pinmask(pin) (_BV((pin)&0xF))
/*
* Forward declare internal functions
*
* The functions take a byte-array and send to the data output as WS2812 bitstream.
* The length is the number of bytes to send - three per LED.
*/
static inline void ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t masklo, uint8_t maskhi);
void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds) {
DDRx_ADDRESS(RGB_DI_PIN) |= pinmask(RGB_DI_PIN);
uint8_t masklo = ~(pinmask(RGB_DI_PIN)) & PORTx_ADDRESS(RGB_DI_PIN);
uint8_t maskhi = pinmask(RGB_DI_PIN) | PORTx_ADDRESS(RGB_DI_PIN);
ws2812_sendarray_mask((uint8_t *)ledarray, number_of_leds * sizeof(LED_TYPE), masklo, maskhi);
_delay_us(WS2812_TRST_US);
}
/*
This routine writes an array of bytes with RGB values to the Dataout pin
using the fast 800kHz clockless WS2811/2812 protocol.
*/
// Timing in ns
#define w_zeropulse 350
#define w_onepulse 900
#define w_totalperiod 1250
// Fixed cycles used by the inner loop
#define w_fixedlow 2
#define w_fixedhigh 4
#define w_fixedtotal 8
// Insert NOPs to match the timing, if possible
#define w_zerocycles (((F_CPU / 1000) * w_zeropulse) / 1000000)
#define w_onecycles (((F_CPU / 1000) * w_onepulse + 500000) / 1000000)
#define w_totalcycles (((F_CPU / 1000) * w_totalperiod + 500000) / 1000000)
// w1_nops - nops between rising edge and falling edge - low
#if w_zerocycles >= w_fixedlow
# define w1_nops (w_zerocycles - w_fixedlow)
#else
# define w1_nops 0
#endif
// w2_nops - nops between fe low and fe high
#if w_onecycles >= (w_fixedhigh + w1_nops)
# define w2_nops (w_onecycles - w_fixedhigh - w1_nops)
#else
# define w2_nops 0
#endif
// w3_nops - nops to complete loop
#if w_totalcycles >= (w_fixedtotal + w1_nops + w2_nops)
# define w3_nops (w_totalcycles - w_fixedtotal - w1_nops - w2_nops)
#else
# define w3_nops 0
#endif
// The only critical timing parameter is the minimum pulse length of the "0"
// Warn or throw error if this timing can not be met with current F_CPU settings.
#define w_lowtime ((w1_nops + w_fixedlow) * 1000000) / (F_CPU / 1000)
#if w_lowtime > 550
# error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?"
#elif w_lowtime > 450
# warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)."
# warning "Please consider a higher clockspeed, if possible"
#endif
#define w_nop1 "nop \n\t"
#define w_nop2 "rjmp .+0 \n\t"
#define w_nop4 w_nop2 w_nop2
#define w_nop8 w_nop4 w_nop4
#define w_nop16 w_nop8 w_nop8
static inline void ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t masklo, uint8_t maskhi) {
uint8_t curbyte, ctr, sreg_prev;
sreg_prev = SREG;
cli();
while (datlen--) {
curbyte = (*data++);
asm volatile(" ldi %0,8 \n\t"
"loop%=: \n\t"
" out %2,%3 \n\t" // '1' [01] '0' [01] - re
#if (w1_nops & 1)
w_nop1
#endif
#if (w1_nops & 2)
w_nop2
#endif
#if (w1_nops & 4)
w_nop4
#endif
#if (w1_nops & 8)
w_nop8
#endif
#if (w1_nops & 16)
w_nop16
#endif
" sbrs %1,7 \n\t" // '1' [03] '0' [02]
" out %2,%4 \n\t" // '1' [--] '0' [03] - fe-low
" lsl %1 \n\t" // '1' [04] '0' [04]
#if (w2_nops & 1)
w_nop1
#endif
#if (w2_nops & 2)
w_nop2
#endif
#if (w2_nops & 4)
w_nop4
#endif
#if (w2_nops & 8)
w_nop8
#endif
#if (w2_nops & 16)
w_nop16
#endif
" out %2,%4 \n\t" // '1' [+1] '0' [+1] - fe-high
#if (w3_nops & 1)
w_nop1
#endif
#if (w3_nops & 2)
w_nop2
#endif
#if (w3_nops & 4)
w_nop4
#endif
#if (w3_nops & 8)
w_nop8
#endif
#if (w3_nops & 16)
w_nop16
#endif
" dec %0 \n\t" // '1' [+2] '0' [+2]
" brne loop%=\n\t" // '1' [+3] '0' [+4]
: "=&d"(ctr)
: "r"(curbyte), "I"(_SFR_IO_ADDR(PORTx_ADDRESS(RGB_DI_PIN))), "r"(maskhi), "r"(masklo));
}
SREG = sreg_prev;
}

27
drivers/avr/ws2812_i2c.c
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#include "ws2812.h"
#include "i2c_master.h"
#ifdef RGBW
# error "RGBW not supported"
#endif
#ifndef WS2812_ADDRESS
# define WS2812_ADDRESS 0xb0
#endif
#ifndef WS2812_TIMEOUT
# define WS2812_TIMEOUT 100
#endif
void ws2812_init(void) { i2c_init(); }
// Setleds for standard RGB
void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
static bool s_init = false;
if (!s_init) {
ws2812_init();
s_init = true;
}
i2c_transmit(WS2812_ADDRESS, (uint8_t *)ledarray, sizeof(LED_TYPE) * leds, WS2812_TIMEOUT);
}

321
drivers/chibios/analog.c
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@ -1,321 +0,0 @@
/* Copyright 2019 Drew Mills
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "quantum.h"
#include "analog.h"
#include <ch.h>
#include <hal.h>
#if !HAL_USE_ADC
# error "You need to set HAL_USE_ADC to TRUE in your halconf.h to use the ADC."
#endif
#if !STM32_ADC_USE_ADC1 && !STM32_ADC_USE_ADC2 && !STM32_ADC_USE_ADC3 && !STM32_ADC_USE_ADC4
# error "You need to set one of the 'STM32_ADC_USE_ADCx' settings to TRUE in your mcuconf.h to use the ADC."
#endif
#if STM32_ADC_DUAL_MODE
# error "STM32 ADC Dual Mode is not supported at this time."
#endif
#if STM32_ADCV3_OVERSAMPLING
# error "STM32 ADCV3 Oversampling is not supported at this time."
#endif
// Otherwise assume V3
#if defined(STM32F0XX) || defined(STM32L0XX)
# define USE_ADCV1
#elif defined(STM32F1XX) || defined(STM32F2XX) || defined(STM32F4XX)
# define USE_ADCV2
#endif
// BODGE to make v2 look like v1,3 and 4
#ifdef USE_ADCV2
# if !defined(ADC_SMPR_SMP_1P5) && defined(ADC_SAMPLE_3)
# define ADC_SMPR_SMP_1P5 ADC_SAMPLE_3
# define ADC_SMPR_SMP_7P5 ADC_SAMPLE_15
# define ADC_SMPR_SMP_13P5 ADC_SAMPLE_28
# define ADC_SMPR_SMP_28P5 ADC_SAMPLE_56
# define ADC_SMPR_SMP_41P5 ADC_SAMPLE_84
# define ADC_SMPR_SMP_55P5 ADC_SAMPLE_112
# define ADC_SMPR_SMP_71P5 ADC_SAMPLE_144
# define ADC_SMPR_SMP_239P5 ADC_SAMPLE_480
# endif
# if !defined(ADC_SMPR_SMP_1P5) && defined(ADC_SAMPLE_1P5)
# define ADC_SMPR_SMP_1P5 ADC_SAMPLE_1P5
# define ADC_SMPR_SMP_7P5 ADC_SAMPLE_7P5
# define ADC_SMPR_SMP_13P5 ADC_SAMPLE_13P5
# define ADC_SMPR_SMP_28P5 ADC_SAMPLE_28P5
# define ADC_SMPR_SMP_41P5 ADC_SAMPLE_41P5
# define ADC_SMPR_SMP_55P5 ADC_SAMPLE_55P5
# define ADC_SMPR_SMP_71P5 ADC_SAMPLE_71P5
# define ADC_SMPR_SMP_239P5 ADC_SAMPLE_239P5
# endif
// we still sample at 12bit, but scale down to the requested bit range
# define ADC_CFGR1_RES_12BIT 12
# define ADC_CFGR1_RES_10BIT 10
# define ADC_CFGR1_RES_8BIT 8
# define ADC_CFGR1_RES_6BIT 6
#endif
/* User configurable ADC options */
#ifndef ADC_COUNT
# if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F4XX)
# define ADC_COUNT 1
# elif defined(STM32F3XX)
# define ADC_COUNT 4
# else
# error "ADC_COUNT has not been set for this ARM microcontroller."
# endif
#endif
#ifndef ADC_NUM_CHANNELS
# define ADC_NUM_CHANNELS 1
#elif ADC_NUM_CHANNELS != 1
# error "The ARM ADC implementation currently only supports reading one channel at a time."
#endif
#ifndef ADC_BUFFER_DEPTH
# define ADC_BUFFER_DEPTH 1
#endif
// For more sampling rate options, look at hal_adc_lld.h in ChibiOS
#ifndef ADC_SAMPLING_RATE
# define ADC_SAMPLING_RATE ADC_SMPR_SMP_1P5
#endif
// Options are 12, 10, 8, and 6 bit.
#ifndef ADC_RESOLUTION
# ifdef ADC_CFGR_RES_10BITS // ADCv3, ADCv4
# define ADC_RESOLUTION ADC_CFGR_RES_10BITS
# else // ADCv1, ADCv5, or the bodge for ADCv2 above
# define ADC_RESOLUTION ADC_CFGR1_RES_10BIT
# endif
#endif
static ADCConfig adcCfg = {};
static adcsample_t sampleBuffer[ADC_NUM_CHANNELS * ADC_BUFFER_DEPTH];
// Initialize to max number of ADCs, set to empty object to initialize all to false.
static bool adcInitialized[ADC_COUNT] = {};
// TODO: add back TR handling???
static ADCConversionGroup adcConversionGroup = {
.circular = FALSE,
.num_channels = (uint16_t)(ADC_NUM_CHANNELS),
#if defined(USE_ADCV1)
.cfgr1 = ADC_CFGR1_CONT | ADC_RESOLUTION,
.smpr = ADC_SAMPLING_RATE,
#elif defined(USE_ADCV2)
# if !defined(STM32F1XX)
.cr2 = ADC_CR2_SWSTART, // F103 seem very unhappy with, F401 seems very unhappy without...
# endif
.smpr2 = ADC_SMPR2_SMP_AN0(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN1(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN2(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN3(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN4(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN5(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN6(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN7(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN8(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN9(ADC_SAMPLING_RATE),
.smpr1 = ADC_SMPR1_SMP_AN10(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN11(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN12(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN13(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN14(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN15(ADC_SAMPLING_RATE),
#else
.cfgr = ADC_CFGR_CONT | ADC_RESOLUTION,
.smpr = {ADC_SMPR1_SMP_AN0(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN1(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN2(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN3(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN4(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN5(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN6(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN7(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN8(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN9(ADC_SAMPLING_RATE), ADC_SMPR2_SMP_AN10(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN11(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN12(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN13(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN14(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN15(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN16(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN17(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN18(ADC_SAMPLING_RATE)},
#endif
};
// clang-format off
__attribute__((weak)) adc_mux pinToMux(pin_t pin) {
switch (pin) {
#if defined(STM32F0XX)
case A0: return TO_MUX( ADC_CHSELR_CHSEL0, 0 );
case A1: return TO_MUX( ADC_CHSELR_CHSEL1, 0 );
case A2: return TO_MUX( ADC_CHSELR_CHSEL2, 0 );
case A3: return TO_MUX( ADC_CHSELR_CHSEL3, 0 );
case A4: return TO_MUX( ADC_CHSELR_CHSEL4, 0 );
case A5: return TO_MUX( ADC_CHSELR_CHSEL5, 0 );
case A6: return TO_MUX( ADC_CHSELR_CHSEL6, 0 );
case A7: return TO_MUX( ADC_CHSELR_CHSEL7, 0 );
case B0: return TO_MUX( ADC_CHSELR_CHSEL8, 0 );
case B1: return TO_MUX( ADC_CHSELR_CHSEL9, 0 );
case C0: return TO_MUX( ADC_CHSELR_CHSEL10, 0 );
case C1: return TO_MUX( ADC_CHSELR_CHSEL11, 0 );
case C2: return TO_MUX( ADC_CHSELR_CHSEL12, 0 );
case C3: return TO_MUX( ADC_CHSELR_CHSEL13, 0 );
case C4: return TO_MUX( ADC_CHSELR_CHSEL14, 0 );
case C5: return TO_MUX( ADC_CHSELR_CHSEL15, 0 );
#elif defined(STM32F3XX)
case A0: return TO_MUX( ADC_CHANNEL_IN1, 0 );
case A1: return TO_MUX( ADC_CHANNEL_IN2, 0 );
case A2: return TO_MUX( ADC_CHANNEL_IN3, 0 );
case A3: return TO_MUX( ADC_CHANNEL_IN4, 0 );
case A4: return TO_MUX( ADC_CHANNEL_IN1, 1 );
case A5: return TO_MUX( ADC_CHANNEL_IN2, 1 );
case A6: return TO_MUX( ADC_CHANNEL_IN3, 1 );
case A7: return TO_MUX( ADC_CHANNEL_IN4, 1 );
case B0: return TO_MUX( ADC_CHANNEL_IN12, 2 );
case B1: return TO_MUX( ADC_CHANNEL_IN1, 2 );
case B2: return TO_MUX( ADC_CHANNEL_IN12, 1 );
case B12: return TO_MUX( ADC_CHANNEL_IN3, 3 );
case B13: return TO_MUX( ADC_CHANNEL_IN5, 2 );
case B14: return TO_MUX( ADC_CHANNEL_IN4, 3 );
case B15: return TO_MUX( ADC_CHANNEL_IN5, 3 );
case C0: return TO_MUX( ADC_CHANNEL_IN6, 0 ); // Can also be ADC2
case C1: return TO_MUX( ADC_CHANNEL_IN7, 0 ); // Can also be ADC2
case C2: return TO_MUX( ADC_CHANNEL_IN8, 0 ); // Can also be ADC2
case C3: return TO_MUX( ADC_CHANNEL_IN9, 0 ); // Can also be ADC2
case C4: return TO_MUX( ADC_CHANNEL_IN5, 1 );
case C5: return TO_MUX( ADC_CHANNEL_IN11, 1 );
case D8: return TO_MUX( ADC_CHANNEL_IN12, 3 );
case D9: return TO_MUX( ADC_CHANNEL_IN13, 3 );
case D10: return TO_MUX( ADC_CHANNEL_IN7, 2 ); // Can also be ADC4
case D11: return TO_MUX( ADC_CHANNEL_IN8, 2 ); // Can also be ADC4
case D12: return TO_MUX( ADC_CHANNEL_IN9, 2 ); // Can also be ADC4
case D13: return TO_MUX( ADC_CHANNEL_IN10, 2 ); // Can also be ADC4
case D14: return TO_MUX( ADC_CHANNEL_IN11, 2 ); // Can also be ADC4
case E7: return TO_MUX( ADC_CHANNEL_IN13, 2 );
case E8: return TO_MUX( ADC_CHANNEL_IN6, 2 ); // Can also be ADC4
case E9: return TO_MUX( ADC_CHANNEL_IN2, 2 );
case E10: return TO_MUX( ADC_CHANNEL_IN14, 2 );
case E11: return TO_MUX( ADC_CHANNEL_IN15, 2 );
case E12: return TO_MUX( ADC_CHANNEL_IN16, 2 );
case E13: return TO_MUX( ADC_CHANNEL_IN3, 2 );
case E14: return TO_MUX( ADC_CHANNEL_IN1, 3 );
case E15: return TO_MUX( ADC_CHANNEL_IN2, 3 );
case F2: return TO_MUX( ADC_CHANNEL_IN10, 0 ); // Can also be ADC2
case F4: return TO_MUX( ADC_CHANNEL_IN5, 0 );
#elif defined(STM32F4XX)
case A0: return TO_MUX( ADC_CHANNEL_IN0, 0 );
case A1: return TO_MUX( ADC_CHANNEL_IN1, 0 );
case A2: return TO_MUX( ADC_CHANNEL_IN2, 0 );
case A3: return TO_MUX( ADC_CHANNEL_IN3, 0 );
case A4: return TO_MUX( ADC_CHANNEL_IN4, 0 );
case A5: return TO_MUX( ADC_CHANNEL_IN5, 0 );
case A6: return TO_MUX( ADC_CHANNEL_IN6, 0 );
case A7: return TO_MUX( ADC_CHANNEL_IN7, 0 );
case B0: return TO_MUX( ADC_CHANNEL_IN8, 0 );
case B1: return TO_MUX( ADC_CHANNEL_IN9, 0 );
case C0: return TO_MUX( ADC_CHANNEL_IN10, 0 );
case C1: return TO_MUX( ADC_CHANNEL_IN11, 0 );
case C2: return TO_MUX( ADC_CHANNEL_IN12, 0 );
case C3: return TO_MUX( ADC_CHANNEL_IN13, 0 );
case C4: return TO_MUX( ADC_CHANNEL_IN14, 0 );
case C5: return TO_MUX( ADC_CHANNEL_IN15, 0 );
# if STM32_ADC_USE_ADC3
case F3: return TO_MUX( ADC_CHANNEL_IN9, 2 );
case F4: return TO_MUX( ADC_CHANNEL_IN14, 2 );
case F5: return TO_MUX( ADC_CHANNEL_IN15, 2 );
case F6: return TO_MUX( ADC_CHANNEL_IN4, 2 );
case F7: return TO_MUX( ADC_CHANNEL_IN5, 2 );
case F8: return TO_MUX( ADC_CHANNEL_IN6, 2 );
case F9: return TO_MUX( ADC_CHANNEL_IN7, 2 );
case F10: return TO_MUX( ADC_CHANNEL_IN8, 2 );
# endif
#elif defined(STM32F1XX)
case A0: return TO_MUX( ADC_CHANNEL_IN0, 0 );
case A1: return TO_MUX( ADC_CHANNEL_IN1, 0 );
case A2: return TO_MUX( ADC_CHANNEL_IN2, 0 );
case A3: return TO_MUX( ADC_CHANNEL_IN3, 0 );
case A4: return TO_MUX( ADC_CHANNEL_IN4, 0 );
case A5: return TO_MUX( ADC_CHANNEL_IN5, 0 );
case A6: return TO_MUX( ADC_CHANNEL_IN6, 0 );
case A7: return TO_MUX( ADC_CHANNEL_IN7, 0 );
case B0: return TO_MUX( ADC_CHANNEL_IN8, 0 );
case B1: return TO_MUX( ADC_CHANNEL_IN9, 0 );
case C0: return TO_MUX( ADC_CHANNEL_IN10, 0 );
case C1: return TO_MUX( ADC_CHANNEL_IN11, 0 );
case C2: return TO_MUX( ADC_CHANNEL_IN12, 0 );
case C3: return TO_MUX( ADC_CHANNEL_IN13, 0 );
case C4: return TO_MUX( ADC_CHANNEL_IN14, 0 );
case C5: return TO_MUX( ADC_CHANNEL_IN15, 0 );
// STM32F103x[C-G] in 144-pin packages also have analog inputs on F6...F10, but they are on ADC3, and the
// ChibiOS ADC driver for STM32F1xx currently supports only ADC1, therefore these pins are not usable.
#endif
}
// return an adc that would never be used so intToADCDriver will bail out
return TO_MUX(0, 0xFF);
}
// clang-format on
static inline ADCDriver* intToADCDriver(uint8_t adcInt) {
switch (adcInt) {
#if STM32_ADC_USE_ADC1
case 0:
return &ADCD1;
#endif
#if STM32_ADC_USE_ADC2
case 1:
return &ADCD2;
#endif
#if STM32_ADC_USE_ADC3
case 2:
return &ADCD3;
#endif
#if STM32_ADC_USE_ADC4
case 3:
return &ADCD4;
#endif
}
return NULL;
}
static inline void manageAdcInitializationDriver(uint8_t adc, ADCDriver* adcDriver) {
if (!adcInitialized[adc]) {
adcStart(adcDriver, &adcCfg);
adcInitialized[adc] = true;
}
}
int16_t analogReadPin(pin_t pin) {
palSetLineMode(pin, PAL_MODE_INPUT_ANALOG);
return adc_read(pinToMux(pin));
}
int16_t analogReadPinAdc(pin_t pin, uint8_t adc) {
palSetLineMode(pin, PAL_MODE_INPUT_ANALOG);
adc_mux target = pinToMux(pin);
target.adc = adc;
return adc_read(target);
}
int16_t adc_read(adc_mux mux) {
#if defined(USE_ADCV1)
// TODO: fix previous assumption of only 1 input...
adcConversionGroup.chselr = 1 << mux.input; /*no macro to convert N to ADC_CHSELR_CHSEL1*/
#elif defined(USE_ADCV2)
adcConversionGroup.sqr3 = ADC_SQR3_SQ1_N(mux.input);
#else
adcConversionGroup.sqr[0] = ADC_SQR1_SQ1_N(mux.input);
#endif
ADCDriver* targetDriver = intToADCDriver(mux.adc);
if (!targetDriver) {
return 0;
}
manageAdcInitializationDriver(mux.adc, targetDriver);
if (adcConvert(targetDriver, &adcConversionGroup, &sampleBuffer[0], ADC_BUFFER_DEPTH) != MSG_OK) {
return 0;
}
#ifdef USE_ADCV2
// fake 12-bit -> N-bit scale
return (*sampleBuffer) >> (12 - ADC_RESOLUTION);
#else
// already handled as part of adcConvert
return *sampleBuffer;
#endif
}

41
drivers/chibios/analog.h
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/* Copyright 2019 Drew Mills
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include "quantum.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
uint16_t input;
uint8_t adc;
} adc_mux;
#define TO_MUX(i, a) \
(adc_mux) { i, a }
int16_t analogReadPin(pin_t pin);
int16_t analogReadPinAdc(pin_t pin, uint8_t adc);
adc_mux pinToMux(pin_t pin);
int16_t adc_read(adc_mux mux);
#ifdef __cplusplus
}
#endif

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drivers/chibios/i2c_master.c
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@ -1,121 +0,0 @@
/* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This library is only valid for STM32 processors.
* This library follows the convention of the AVR i2c_master library.
* As a result addresses are expected to be already shifted (addr << 1).
* I2CD1 is the default driver which corresponds to pins B6 and B7. This
* can be changed.
* Please ensure that HAL_USE_I2C is TRUE in the halconf.h file and that
* STM32_I2C_USE_I2C1 is TRUE in the mcuconf.h file. Pins B6 and B7 are used
* but using any other I2C pins should be trivial.
*/
#include "quantum.h"
#include "i2c_master.h"
#include <string.h>
#include <hal.h>
static uint8_t i2c_address;
static const I2CConfig i2cconfig = {
#if defined(USE_I2CV1_CONTRIB)
I2C1_CLOCK_SPEED,
#elif defined(USE_I2CV1)
I2C1_OPMODE,
I2C1_CLOCK_SPEED,
I2C1_DUTY_CYCLE,
#else
// This configures the I2C clock to 400khz assuming a 72Mhz clock
// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
STM32_TIMINGR_PRESC(I2C1_TIMINGR_PRESC) | STM32_TIMINGR_SCLDEL(I2C1_TIMINGR_SCLDEL) | STM32_TIMINGR_SDADEL(I2C1_TIMINGR_SDADEL) | STM32_TIMINGR_SCLH(I2C1_TIMINGR_SCLH) | STM32_TIMINGR_SCLL(I2C1_TIMINGR_SCLL), 0, 0
#endif
};
static i2c_status_t chibios_to_qmk(const msg_t* status) {
switch (*status) {
case I2C_NO_ERROR:
return I2C_STATUS_SUCCESS;
case I2C_TIMEOUT:
return I2C_STATUS_TIMEOUT;
// I2C_BUS_ERROR, I2C_ARBITRATION_LOST, I2C_ACK_FAILURE, I2C_OVERRUN, I2C_PEC_ERROR, I2C_SMB_ALERT
default:
return I2C_STATUS_ERROR;
}
}
__attribute__((weak)) void i2c_init(void) {
static bool is_initialised = false;
if (!is_initialised) {
is_initialised = true;
// Try releasing special pins for a short time
palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_INPUT);
palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_INPUT);
chThdSleepMilliseconds(10);
#if defined(USE_GPIOV1)
palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, I2C1_SCL_PAL_MODE);
palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, I2C1_SDA_PAL_MODE);
#else
palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_ALTERNATE(I2C1_SCL_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_ALTERNATE(I2C1_SDA_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
#endif
}
}
i2c_status_t i2c_start(uint8_t address) {
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
return I2C_STATUS_SUCCESS;
}
i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, 0, 0, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_address = address;
i2cStart(&I2C_DRIVER, &i2cconfig);
msg_t status = i2cMasterReceiveTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_address = devaddr;
i2cStart(&I2C_DRIVER, &i2cconfig);
uint8_t complete_packet[length + 1];
for (uint8_t i = 0; i < length; i++) {
complete_packet[i + 1] = data[i];
}
complete_packet[0] = regaddr;
msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), complete_packet, length + 1, 0, 0, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
i2c_address = devaddr;
i2cStart(&I2C_DRIVER, &i2cconfig);
msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), &regaddr, 1, data, length, TIME_MS2I(timeout));
return chibios_to_qmk(&status);
}
void i2c_stop(void) { i2cStop(&I2C_DRIVER); }

113
drivers/chibios/i2c_master.h
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@ -1,113 +0,0 @@
/* Copyright 2018 Jack Humbert
* Copyright 2018 Yiancar
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This library follows the convention of the AVR i2c_master library.
* As a result addresses are expected to be already shifted (addr << 1).
* I2CD1 is the default driver which corresponds to pins B6 and B7. This
* can be changed.
* Please ensure that HAL_USE_I2C is TRUE in the halconf.h file and that
* STM32_I2C_USE_I2C1 is TRUE in the mcuconf.h file.
*/
#pragma once
#include <ch.h>
#include <hal.h>
#ifdef I2C1_BANK
# define I2C1_SCL_BANK I2C1_BANK
# define I2C1_SDA_BANK I2C1_BANK
#endif
#ifndef I2C1_SCL_BANK
# define I2C1_SCL_BANK GPIOB
#endif
#ifndef I2C1_SDA_BANK
# define I2C1_SDA_BANK GPIOB
#endif
#ifndef I2C1_SCL
# define I2C1_SCL 6
#endif
#ifndef I2C1_SDA
# define I2C1_SDA 7
#endif
#ifdef USE_I2CV1
# ifndef I2C1_OPMODE
# define I2C1_OPMODE OPMODE_I2C
# endif
# ifndef I2C1_CLOCK_SPEED
# define I2C1_CLOCK_SPEED 100000 /* 400000 */
# endif
# ifndef I2C1_DUTY_CYCLE
# define I2C1_DUTY_CYCLE STD_DUTY_CYCLE /* FAST_DUTY_CYCLE_2 */
# endif
#else
// The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
# ifndef I2C1_TIMINGR_PRESC
# define I2C1_TIMINGR_PRESC 0U
# endif
# ifndef I2C1_TIMINGR_SCLDEL
# define I2C1_TIMINGR_SCLDEL 7U
# endif
# ifndef I2C1_TIMINGR_SDADEL
# define I2C1_TIMINGR_SDADEL 0U
# endif
# ifndef I2C1_TIMINGR_SCLH
# define I2C1_TIMINGR_SCLH 38U
# endif
# ifndef I2C1_TIMINGR_SCLL
# define I2C1_TIMINGR_SCLL 129U
# endif
#endif
#ifndef I2C_DRIVER
# define I2C_DRIVER I2CD1
#endif
#ifdef USE_GPIOV1
# ifndef I2C1_SCL_PAL_MODE
# define I2C1_SCL_PAL_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
# endif
# ifndef I2C1_SDA_PAL_MODE
# define I2C1_SDA_PAL_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
# endif
#else
// The default PAL alternate modes are used to signal that the pins are used for I2C
# ifndef I2C1_SCL_PAL_MODE
# define I2C1_SCL_PAL_MODE 4
# endif
# ifndef I2C1_SDA_PAL_MODE
# define I2C1_SDA_PAL_MODE 4
# endif
#endif
typedef int16_t i2c_status_t;
#define I2C_STATUS_SUCCESS (0)
#define I2C_STATUS_ERROR (-1)
#define I2C_STATUS_TIMEOUT (-2)
void i2c_init(void);
i2c_status_t i2c_start(uint8_t address);
i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
void i2c_stop(void);

278
drivers/chibios/serial.c
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@ -1,278 +0,0 @@
/*
* WARNING: be careful changing this code, it is very timing dependent
*/
#include "quantum.h"
#include "serial.h"
#include "wait.h"
#include <hal.h>
// TODO: resolve/remove build warnings
#if defined(RGBLIGHT_ENABLE) && defined(RGBLED_SPLIT) && defined(PROTOCOL_CHIBIOS) && defined(WS2812_DRIVER_BITBANG)
# warning "RGBLED_SPLIT not supported with bitbang WS2812 driver"
#endif
// default wait implementation cannot be called within interrupt
// this method seems to be more accurate than GPT timers
#if PORT_SUPPORTS_RT == FALSE
# error "chSysPolledDelayX method not supported on this platform"
#else
# undef wait_us
# define wait_us(x) chSysPolledDelayX(US2RTC(STM32_SYSCLK, x))
#endif
#ifndef SELECT_SOFT_SERIAL_SPEED
# define SELECT_SOFT_SERIAL_SPEED 1
// TODO: correct speeds...
// 0: about 189kbps (Experimental only)
// 1: about 137kbps (default)
// 2: about 75kbps
// 3: about 39kbps
// 4: about 26kbps
// 5: about 20kbps
#endif
// Serial pulse period in microseconds. At the moment, going lower than 12 causes communication failure
#if SELECT_SOFT_SERIAL_SPEED == 0
# define SERIAL_DELAY 12
#elif SELECT_SOFT_SERIAL_SPEED == 1
# define SERIAL_DELAY 16
#elif SELECT_SOFT_SERIAL_SPEED == 2
# define SERIAL_DELAY 24
#elif SELECT_SOFT_SERIAL_SPEED == 3
# define SERIAL_DELAY 32
#elif SELECT_SOFT_SERIAL_SPEED == 4
# define SERIAL_DELAY 48
#elif SELECT_SOFT_SERIAL_SPEED == 5
# define SERIAL_DELAY 64
#else
# error invalid SELECT_SOFT_SERIAL_SPEED value
#endif
inline static void serial_delay(void) { wait_us(SERIAL_DELAY); }
inline static void serial_delay_half(void) { wait_us(SERIAL_DELAY / 2); }
inline static void serial_delay_blip(void) { wait_us(1); }
inline static void serial_output(void) { setPinOutput(SOFT_SERIAL_PIN); }
inline static void serial_input(void) { setPinInputHigh(SOFT_SERIAL_PIN); }
inline static bool serial_read_pin(void) { return !!readPin(SOFT_SERIAL_PIN); }
inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
void interrupt_handler(void *arg);
// Use thread + palWaitLineTimeout instead of palSetLineCallback
// - Methods like setPinOutput and palEnableLineEvent/palDisableLineEvent
// cause the interrupt to lock up, which would limit to only receiving data...
static THD_WORKING_AREA(waThread1, 128);
static THD_FUNCTION(Thread1, arg) {
(void)arg;
chRegSetThreadName("blinker");
while (true) {
palWaitLineTimeout(SOFT_SERIAL_PIN, TIME_INFINITE);
interrupt_handler(NULL);
}
}
void soft_serial_initiator_init(void) {
serial_output();
serial_high();
}
void soft_serial_target_init(void) {
serial_input();
palEnablePadEvent(PAL_PORT(SOFT_SERIAL_PIN), PAL_PAD(SOFT_SERIAL_PIN), PAL_EVENT_MODE_FALLING_EDGE);
chThdCreateStatic(waThread1, sizeof(waThread1), HIGHPRIO, Thread1, NULL);
}
// Used by the master to synchronize timing with the slave.
static void __attribute__((noinline)) sync_recv(void) {
serial_input();
// This shouldn't hang if the slave disconnects because the
// serial line will float to high if the slave does disconnect.
while (!serial_read_pin()) {
}
serial_delay();
}
// Used by the slave to send a synchronization signal to the master.
static void __attribute__((noinline)) sync_send(void) {
serial_output();
serial_low();
serial_delay();
serial_high();
}
// Reads a byte from the serial line
static uint8_t __attribute__((noinline)) serial_read_byte(void) {
uint8_t byte = 0;
serial_input();
for (uint8_t i = 0; i < 8; ++i) {
byte = (byte << 1) | serial_read_pin();
serial_delay();
}
return byte;
}
// Sends a byte with MSB ordering
static void __attribute__((noinline)) serial_write_byte(uint8_t data) {
uint8_t b = 8;
serial_output();
while (b--) {
if (data & (1 << b)) {
serial_high();
} else {
serial_low();
}
serial_delay();
}
}
// interrupt handle to be used by the slave device
void interrupt_handler(void *arg) {
chSysLockFromISR();
sync_send();
// read mid pulses
serial_delay_blip();
uint8_t checksum_computed = 0;
int sstd_index = 0;
sstd_index = serial_read_byte();
sync_send();
split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
for (int i = 0; i < trans->initiator2target_buffer_size; ++i) {
split_trans_initiator2target_buffer(trans)[i] = serial_read_byte();
sync_send();
checksum_computed += split_trans_initiator2target_buffer(trans)[i];
}
checksum_computed ^= 7;
uint8_t checksum_received = serial_read_byte();
sync_send();
// wait for the sync to finish sending
serial_delay();
// Allow any slave processing to occur
if (trans->slave_callback) {
trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
}
uint8_t checksum = 0;
for (int i = 0; i < trans->target2initiator_buffer_size; ++i) {
serial_write_byte(split_trans_target2initiator_buffer(trans)[i]);
sync_send();
serial_delay_half();
checksum += split_trans_target2initiator_buffer(trans)[i];
}
serial_write_byte(checksum ^ 7);
sync_send();
// wait for the sync to finish sending
serial_delay();
*trans->status = (checksum_computed == checksum_received) ? TRANSACTION_ACCEPTED : TRANSACTION_DATA_ERROR;
// end transaction
serial_input();
// TODO: remove extra delay between transactions
serial_delay();
chSysUnlockFromISR();
}
/////////
// start transaction by initiator
//
// int soft_serial_transaction(int sstd_index)
//
// Returns:
// TRANSACTION_END
// TRANSACTION_NO_RESPONSE
// TRANSACTION_DATA_ERROR
// this code is very time dependent, so we need to disable interrupts
int soft_serial_transaction(int sstd_index) {
if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
if (!trans->status) return TRANSACTION_TYPE_ERROR; // not registered
// TODO: remove extra delay between transactions
serial_delay();
// this code is very time dependent, so we need to disable interrupts
chSysLock();
// signal to the slave that we want to start a transaction
serial_output();
serial_low();
serial_delay_blip();
// wait for the slaves response
serial_input();
serial_high();
serial_delay();
// check if the slave is present
if (serial_read_pin()) {
// slave failed to pull the line low, assume not present
dprintf("serial::NO_RESPONSE\n");
chSysUnlock();
return TRANSACTION_NO_RESPONSE;
}
// if the slave is present syncronize with it
uint8_t checksum = 0;
// send data to the slave
serial_write_byte(sstd_index); // first chunk is transaction id
sync_recv();
for (int i = 0; i < trans->initiator2target_buffer_size; ++i) {
serial_write_byte(split_trans_initiator2target_buffer(trans)[i]);
sync_recv();
checksum += split_trans_initiator2target_buffer(trans)[i];
}
serial_write_byte(checksum ^ 7);
sync_recv();
serial_delay();
serial_delay(); // read mid pulses
// receive data from the slave
uint8_t checksum_computed = 0;
for (int i = 0; i < trans->target2initiator_buffer_size; ++i) {
split_trans_target2initiator_buffer(trans)[i] = serial_read_byte();
sync_recv();
checksum_computed += split_trans_target2initiator_buffer(trans)[i];
}
checksum_computed ^= 7;
uint8_t checksum_received = serial_read_byte();
sync_recv();
serial_delay();
if ((checksum_computed) != (checksum_received)) {
dprintf("serial::FAIL[%u,%u,%u]\n", checksum_computed, checksum_received, sstd_index);
serial_output();
serial_high();
chSysUnlock();
return TRANSACTION_DATA_ERROR;
}
// always, release the line when not in use
serial_high();
serial_output();
chSysUnlock();
return TRANSACTION_END;
}

318
drivers/chibios/serial_usart.c
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@ -1,318 +0,0 @@
/* Copyright 2021 QMK
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "serial_usart.h"
#if defined(SERIAL_USART_CONFIG)
static SerialConfig serial_config = SERIAL_USART_CONFIG;
#else
static SerialConfig serial_config = {
.speed = (SERIAL_USART_SPEED), /* speed - mandatory */
.cr1 = (SERIAL_USART_CR1),
.cr2 = (SERIAL_USART_CR2),
# if !defined(SERIAL_USART_FULL_DUPLEX)
.cr3 = ((SERIAL_USART_CR3) | USART_CR3_HDSEL) /* activate half-duplex mode */
# else
.cr3 = (SERIAL_USART_CR3)
# endif
};
#endif
static SerialDriver* serial_driver = &SERIAL_USART_DRIVER;
static inline bool react_to_transactions(void);
static inline bool __attribute__((nonnull)) receive(uint8_t* destination, const size_t size);
static inline bool __attribute__((nonnull)) send(const uint8_t* source, const size_t size);
static inline int initiate_transaction(uint8_t sstd_index);
static inline void usart_clear(void);
/**
* @brief Clear the receive input queue.
*/
static inline void usart_clear(void) {
osalSysLock();
bool volatile queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
osalSysUnlock();
while (queue_not_empty) {
osalSysLock();
/* Hard reset the input queue. */
iqResetI(&serial_driver->iqueue);
osalSysUnlock();
/* Allow pending interrupts to preempt.
* Do not merge the lock/unlock blocks into one
* or the code will not work properly.
* The empty read adds a tiny amount of delay. */
(void)queue_not_empty;
osalSysLock();
queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
osalSysUnlock();
}
}
/**
* @brief Blocking send of buffer with timeout.
*
* @return true Send success.
* @return false Send failed.
*/
static inline bool send(const uint8_t* source, const size_t size) {
bool success = (size_t)sdWriteTimeout(serial_driver, source, size, TIME_MS2I(SERIAL_USART_TIMEOUT)) == size;
#if !defined(SERIAL_USART_FULL_DUPLEX)
if (success) {
/* Half duplex fills the input queue with the data we wrote - just throw it away.
Under the right circumstances (e.g. bad cables paired with high baud rates)
less bytes can be present in the input queue, therefore a timeout is needed. */
uint8_t dump[size];
return receive(dump, size);
}
#endif
return success;
}
/**
* @brief Blocking receive of size * bytes with timeout.
*
* @return true Receive success.
* @return false Receive failed.
*/
static inline bool receive(uint8_t* destination, const size_t size) {
bool success = (size_t)sdReadTimeout(serial_driver, destination, size, TIME_MS2I(SERIAL_USART_TIMEOUT)) == size;
return success;
}
#if !defined(SERIAL_USART_FULL_DUPLEX)
/**
* @brief Initiate pins for USART peripheral. Half-duplex configuration.
*/
__attribute__((weak)) void usart_init(void) {
# if defined(MCU_STM32)
# if defined(USE_GPIOV1)
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
# else
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
# endif
# if defined(USART_REMAP)
USART_REMAP;
# endif
# else
# pragma message "usart_init: MCU Familiy not supported by default, please supply your own init code by implementing usart_init() in your keyboard files."
# endif
}
#else
/**
* @brief Initiate pins for USART peripheral. Full-duplex configuration.
*/
__attribute__((weak)) void usart_init(void) {
# if defined(MCU_STM32)
# if defined(USE_GPIOV1)
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_INPUT);
# else
palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_RX_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
# endif
# if defined(USART_REMAP)
USART_REMAP;
# endif
# else
# pragma message "usart_init: MCU Familiy not supported by default, please supply your own init code by implementing usart_init() in your keyboard files."
# endif
}
#endif
/**
* @brief Overridable master specific initializations.
*/
__attribute__((weak, nonnull)) void usart_master_init(SerialDriver** driver) {
(void)driver;
usart_init();
}
/**
* @brief Overridable slave specific initializations.
*/
__attribute__((weak, nonnull)) void usart_slave_init(SerialDriver** driver) {
(void)driver;
usart_init();
}
/**
* @brief This thread runs on the slave and responds to transactions initiated
* by the master.
*/
static THD_WORKING_AREA(waSlaveThread, 1024);
static THD_FUNCTION(SlaveThread, arg) {
(void)arg;
chRegSetThreadName("usart_tx_rx");
while (true) {
if (!react_to_transactions()) {
/* Clear the receive queue, to start with a clean slate.
* Parts of failed transactions or spurious bytes could still be in it. */
usart_clear();
}
}
}
/**
* @brief Slave specific initializations.
*/
void soft_serial_target_init(void) {
usart_slave_init(&serial_driver);
sdStart(serial_driver, &serial_config);
/* Start transport thread. */
chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL);
}
/**
* @brief React to transactions started by the master.
*/
static inline bool react_to_transactions(void) {
/* Wait until there is a transaction for us. */
uint8_t sstd_index = (uint8_t)sdGet(serial_driver);
/* Sanity check that we are actually responding to a valid transaction. */
if (sstd_index >= NUM_TOTAL_TRANSACTIONS) {
return false;
}
split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
/* Send back the handshake which is XORed as a simple checksum,
to signal that the slave is ready to receive possible transaction buffers */
sstd_index ^= HANDSHAKE_MAGIC;
if (!send(&sstd_index, sizeof(sstd_index))) {
*trans->status = TRANSACTION_DATA_ERROR;
return false;
}
/* Receive transaction buffer from the master. If this transaction requires it.*/
if (trans->initiator2target_buffer_size) {
if (!receive(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
*trans->status = TRANSACTION_DATA_ERROR;
return false;
}
}
/* Allow any slave processing to occur. */
if (trans->slave_callback) {
trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, split_trans_target2initiator_buffer(trans));
}
/* Send transaction buffer to the master. If this transaction requires it. */
if (trans->target2initiator_buffer_size) {
if (!send(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
*trans->status = TRANSACTION_DATA_ERROR;
return false;
}
}
*trans->status = TRANSACTION_ACCEPTED;
return true;
}
/**
* @brief Master specific initializations.
*/
void soft_serial_initiator_init(void) {
usart_master_init(&serial_driver);
#if defined(MCU_STM32) && defined(SERIAL_USART_PIN_SWAP)
serial_config.cr2 |= USART_CR2_SWAP; // master has swapped TX/RX pins
#endif
sdStart(serial_driver, &serial_config);
}
/**
* @brief Start transaction from the master half to the slave half.
*
* @param index Transaction Table index of the transaction to start.
* @return int TRANSACTION_NO_RESPONSE in case of Timeout.
* TRANSACTION_TYPE_ERROR in case of invalid transaction index.
* TRANSACTION_END in case of success.
*/
int soft_serial_transaction(int index) {
/* Clear the receive queue, to start with a clean slate.
* Parts of failed transactions or spurious bytes could still be in it. */
usart_clear();
return initiate_transaction((uint8_t)index);
}
/**
* @brief Initiate transaction to slave half.
*/
static inline int initiate_transaction(uint8_t sstd_index) {
/* Sanity check that we are actually starting a valid transaction. */
if (sstd_index >= NUM_TOTAL_TRANSACTIONS) {
dprintln("USART: Illegal transaction Id.");
return TRANSACTION_TYPE_ERROR;
}
split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
/* Transaction is not registered. Abort. */
if (!trans->status) {
dprintln("USART: Transaction not registered.");
return TRANSACTION_TYPE_ERROR;
}
/* Send transaction table index to the slave, which doubles as basic handshake token. */
if (!send(&sstd_index, sizeof(sstd_index))) {
dprintln("USART: Send Handshake failed.");
return TRANSACTION_TYPE_ERROR;
}
uint8_t sstd_index_shake = 0xFF;
/* Which we always read back first so that we can error out correctly.
* - due to the half duplex limitations on return codes, we always have to read *something*.
* - without the read, write only transactions *always* succeed, even during the boot process where the slave is not ready.
*/
if (!receive(&sstd_index_shake, sizeof(sstd_index_shake)) || (sstd_index_shake != (sstd_index ^ HANDSHAKE_MAGIC))) {
dprintln("USART: Handshake failed.");
return TRANSACTION_NO_RESPONSE;
}
/* Send transaction buffer to the slave. If this transaction requires it. */
if (trans->initiator2target_buffer_size) {
if (!send(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
dprintln("USART: Send failed.");
return TRANSACTION_NO_RESPONSE;
}
}
/* Receive transaction buffer from the slave. If this transaction requires it. */
if (trans->target2initiator_buffer_size) {
if (!receive(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
dprintln("USART: Receive failed.");
return TRANSACTION_NO_RESPONSE;
}
}
return TRANSACTION_END;
}

116
drivers/chibios/serial_usart.h
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@ -1,116 +0,0 @@
/* Copyright 2021 QMK
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "quantum.h"
#include "serial.h"
#include "printf.h"
#include <ch.h>
#include <hal.h>
#if !defined(SERIAL_USART_DRIVER)
# define SERIAL_USART_DRIVER SD1
#endif
#if !defined(USE_GPIOV1)
/* The default PAL alternate modes are used to signal that the pins are used for USART. */
# if !defined(SERIAL_USART_TX_PAL_MODE)
# define SERIAL_USART_TX_PAL_MODE 7
# endif
# if !defined(SERIAL_USART_RX_PAL_MODE)
# define SERIAL_USART_RX_PAL_MODE 7
# endif
#endif
#if defined(SOFT_SERIAL_PIN)
# define SERIAL_USART_TX_PIN SOFT_SERIAL_PIN
#endif
#if !defined(SERIAL_USART_TX_PIN)
# define SERIAL_USART_TX_PIN A9
#endif
#if !defined(SERIAL_USART_RX_PIN)
# define SERIAL_USART_RX_PIN A10
#endif
#if !defined(USART_CR1_M0)
# define USART_CR1_M0 USART_CR1_M // some platforms (f1xx) dont have this so
#endif
#if !defined(SERIAL_USART_CR1)
# define SERIAL_USART_CR1 (USART_CR1_PCE | USART_CR1_PS | USART_CR1_M0) // parity enable, odd parity, 9 bit length
#endif
#if !defined(SERIAL_USART_CR2)
# define SERIAL_USART_CR2 (USART_CR2_STOP_1) // 2 stop bits
#endif
#if !defined(SERIAL_USART_CR3)
# define SERIAL_USART_CR3 0
#endif
#if defined(USART1_REMAP)
# define USART_REMAP \
do { \
(AFIO->MAPR |= AFIO_MAPR_USART1_REMAP); \
} while (0)
#elif defined(USART2_REMAP)
# define USART_REMAP \
do { \
(AFIO->MAPR |= AFIO_MAPR_USART2_REMAP); \
} while (0)
#elif defined(USART3_PARTIALREMAP)
# define USART_REMAP \
do { \
(AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_PARTIALREMAP); \
} while (0)
#elif defined(USART3_FULLREMAP)
# define USART_REMAP \
do { \
(AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_FULLREMAP); \
} while (0)
#endif
#if !defined(SELECT_SOFT_SERIAL_SPEED)
# define SELECT_SOFT_SERIAL_SPEED 1
#endif
#if defined(SERIAL_USART_SPEED)
// Allow advanced users to directly set SERIAL_USART_SPEED
#elif SELECT_SOFT_SERIAL_SPEED == 0
# define SERIAL_USART_SPEED 460800
#elif SELECT_SOFT_SERIAL_SPEED == 1
# define SERIAL_USART_SPEED 230400
#elif SELECT_SOFT_SERIAL_SPEED == 2
# define SERIAL_USART_SPEED 115200
#elif SELECT_SOFT_SERIAL_SPEED == 3
# define SERIAL_USART_SPEED 57600
#elif SELECT_SOFT_SERIAL_SPEED == 4
# define SERIAL_USART_SPEED 38400
#elif SELECT_SOFT_SERIAL_SPEED == 5
# define SERIAL_USART_SPEED 19200
#else
# error invalid SELECT_SOFT_SERIAL_SPEED value
#endif
#if !defined(SERIAL_USART_TIMEOUT)
# define SERIAL_USART_TIMEOUT 100
#endif
#define HANDSHAKE_MAGIC 7

202
drivers/chibios/spi_master.c
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@ -1,202 +0,0 @@
/* Copyright 2020 Nick Brassel (tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "spi_master.h"
#include "timer.h"
static pin_t currentSlavePin = NO_PIN;
#if defined(K20x) || defined(KL2x)
static SPIConfig spiConfig = {NULL, 0, 0, 0};
#else
static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0};
#endif
__attribute__((weak)) void spi_init(void) {
static bool is_initialised = false;
if (!is_initialised) {
is_initialised = true;
// Try releasing special pins for a short time
setPinInput(SPI_SCK_PIN);
setPinInput(SPI_MOSI_PIN);
setPinInput(SPI_MISO_PIN);
chThdSleepMilliseconds(10);
#if defined(USE_GPIOV1)
palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), SPI_SCK_PAL_MODE);
palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), SPI_MOSI_PAL_MODE);
palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), SPI_MISO_PAL_MODE);
#else
palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_ALTERNATE(SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_ALTERNATE(SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_ALTERNATE(SPI_MISO_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
#endif
}
}
bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
if (currentSlavePin != NO_PIN || slavePin == NO_PIN) {
return false;
}
uint16_t roundedDivisor = 2;
while (roundedDivisor < divisor) {
roundedDivisor <<= 1;
}
if (roundedDivisor < 2 || roundedDivisor > 256) {
return false;
}
#if defined(K20x) || defined(KL2x)
spiConfig.tar0 = SPIx_CTARn_FMSZ(7) | SPIx_CTARn_ASC(1);
if (lsbFirst) {
spiConfig.tar0 |= SPIx_CTARn_LSBFE;
}
switch (mode) {
case 0:
break;
case 1:
spiConfig.tar0 |= SPIx_CTARn_CPHA;
break;
case 2:
spiConfig.tar0 |= SPIx_CTARn_CPOL;
break;
case 3:
spiConfig.tar0 |= SPIx_CTARn_CPHA | SPIx_CTARn_CPOL;
break;
}
switch (roundedDivisor) {
case 2:
spiConfig.tar0 |= SPIx_CTARn_BR(0);
break;
case 4:
spiConfig.tar0 |= SPIx_CTARn_BR(1);
break;
case 8:
spiConfig.tar0 |= SPIx_CTARn_BR(3);
break;
case 16:
spiConfig.tar0 |= SPIx_CTARn_BR(4);
break;
case 32:
spiConfig.tar0 |= SPIx_CTARn_BR(5);
break;
case 64:
spiConfig.tar0 |= SPIx_CTARn_BR(6);
break;
case 128:
spiConfig.tar0 |= SPIx_CTARn_BR(7);
break;
case 256:
spiConfig.tar0 |= SPIx_CTARn_BR(8);
break;
}
#else
spiConfig.cr1 = 0;
if (lsbFirst) {
spiConfig.cr1 |= SPI_CR1_LSBFIRST;
}
switch (mode) {
case 0:
break;
case 1:
spiConfig.cr1 |= SPI_CR1_CPHA;
break;
case 2:
spiConfig.cr1 |= SPI_CR1_CPOL;
break;
case 3:
spiConfig.cr1 |= SPI_CR1_CPHA | SPI_CR1_CPOL;
break;
}
switch (roundedDivisor) {
case 2:
break;
case 4:
spiConfig.cr1 |= SPI_CR1_BR_0;
break;
case 8:
spiConfig.cr1 |= SPI_CR1_BR_1;
break;
case 16:
spiConfig.cr1 |= SPI_CR1_BR_1 | SPI_CR1_BR_0;
break;
case 32:
spiConfig.cr1 |= SPI_CR1_BR_2;
break;
case 64:
spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_0;
break;
case 128:
spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1;
break;
case 256:
spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0;
break;
}
#endif
currentSlavePin = slavePin;
spiConfig.ssport = PAL_PORT(slavePin);
spiConfig.sspad = PAL_PAD(slavePin);
setPinOutput(slavePin);
spiStart(&SPI_DRIVER, &spiConfig);
spiSelect(&SPI_DRIVER);
return true;
}
spi_status_t spi_write(uint8_t data) {
uint8_t rxData;
spiExchange(&SPI_DRIVER, 1, &data, &rxData);
return rxData;
}
spi_status_t spi_read(void) {
uint8_t data = 0;
spiReceive(&SPI_DRIVER, 1, &data);
return data;
}
spi_status_t spi_transmit(const uint8_t *data, uint16_t length) {
spiSend(&SPI_DRIVER, length, data);
return SPI_STATUS_SUCCESS;
}
spi_status_t spi_receive(uint8_t *data, uint16_t length) {
spiReceive(&SPI_DRIVER, length, data);
return SPI_STATUS_SUCCESS;
}
void spi_stop(void) {
if (currentSlavePin != NO_PIN) {
spiUnselect(&SPI_DRIVER);
spiStop(&SPI_DRIVER);
currentSlavePin = NO_PIN;
}
}

93
drivers/chibios/spi_master.h
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@ -1,93 +0,0 @@
/* Copyright 2020 Nick Brassel (tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <ch.h>
#include <hal.h>
#include <stdbool.h>
#include "gpio.h"
#include "chibios_config.h"
#ifndef SPI_DRIVER
# define SPI_DRIVER SPID2
#endif
#ifndef SPI_SCK_PIN
# define SPI_SCK_PIN B13
#endif
#ifndef SPI_SCK_PAL_MODE
# if defined(USE_GPIOV1)
# define SPI_SCK_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
# else
# define SPI_SCK_PAL_MODE 5
# endif
#endif
#ifndef SPI_MOSI_PIN
# define SPI_MOSI_PIN B15
#endif
#ifndef SPI_MOSI_PAL_MODE
# if defined(USE_GPIOV1)
# define SPI_MOSI_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
# else
# define SPI_MOSI_PAL_MODE 5
# endif
#endif
#ifndef SPI_MISO_PIN
# define SPI_MISO_PIN B14
#endif
#ifndef SPI_MISO_PAL_MODE
# if defined(USE_GPIOV1)
# define SPI_MISO_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
# else
# define SPI_MISO_PAL_MODE 5
# endif
#endif
typedef int16_t spi_status_t;
#define SPI_STATUS_SUCCESS (0)
#define SPI_STATUS_ERROR (-1)
#define SPI_STATUS_TIMEOUT (-2)
#define SPI_TIMEOUT_IMMEDIATE (0)
#define SPI_TIMEOUT_INFINITE (0xFFFF)
#ifdef __cplusplus
extern "C" {
#endif
void spi_init(void);
bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor);
spi_status_t spi_write(uint8_t data);
spi_status_t spi_read(void);
spi_status_t spi_transmit(const uint8_t *data, uint16_t length);
spi_status_t spi_receive(uint8_t *data, uint16_t length);
void spi_stop(void);
#ifdef __cplusplus
}
#endif

50
drivers/chibios/uart.c
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@ -1,50 +0,0 @@
/* Copyright 2021
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "uart.h"
#include "quantum.h"
static SerialConfig serialConfig = {SERIAL_DEFAULT_BITRATE, SD1_CR1, SD1_CR2, SD1_CR3};
void uart_init(uint32_t baud) {
static bool is_initialised = false;
if (!is_initialised) {
is_initialised = true;
serialConfig.speed = baud;
#if defined(USE_GPIOV1)
palSetLineMode(SD1_TX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
palSetLineMode(SD1_RX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
#else
palSetLineMode(SD1_TX_PIN, PAL_MODE_ALTERNATE(SD1_TX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
palSetLineMode(SD1_RX_PIN, PAL_MODE_ALTERNATE(SD1_RX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
#endif
sdStart(&SERIAL_DRIVER, &serialConfig);
}
}
void uart_putchar(uint8_t c) { sdPut(&SERIAL_DRIVER, c); }
uint8_t uart_getchar(void) {
msg_t res = sdGet(&SERIAL_DRIVER);
return (uint8_t)res;
}
bool uart_available(void) { return !sdGetWouldBlock(&SERIAL_DRIVER); }

77
drivers/chibios/uart.h
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@ -1,77 +0,0 @@
/* Copyright 2021
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include <hal.h>
#ifndef SERIAL_DRIVER
# define SERIAL_DRIVER SD1
#endif
#ifndef SD1_TX_PIN
# define SD1_TX_PIN A9
#endif
#ifndef SD1_TX_PAL_MODE
# define SD1_TX_PAL_MODE 7
#endif
#ifndef SD1_RX_PIN
# define SD1_RX_PIN A10
#endif
#ifndef SD1_RX_PAL_MODE
# define SD1_RX_PAL_MODE 7
#endif
#ifndef SD1_CTS_PIN
# define SD1_CTS_PIN A11
#endif
#ifndef SD1_CTS_PAL_MODE
# define SD1_CTS_PAL_MODE 7
#endif
#ifndef SD1_RTS_PIN
# define SD1_RTS_PIN A12
#endif
#ifndef SD1_RTS_PAL_MODE
# define SD1_RTS_PAL_MODE 7
#endif
#ifndef SD1_CR1
# define SD1_CR1 0
#endif
#ifndef SD1_CR2
# define SD1_CR2 0
#endif
#ifndef SD1_CR3
# define SD1_CR3 0
#endif
void uart_init(uint32_t baud);
void uart_putchar(uint8_t c);
uint8_t uart_getchar(void);
bool uart_available(void);

76
drivers/chibios/usbpd_stm32g4.c
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@ -1,76 +0,0 @@
/* Copyright 2021 Nick Brassel (@tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <quantum.h>
#ifndef USBPD_UCPD1_CFG1
# define USBPD_UCPD1_CFG1 (UCPD_CFG1_PSC_UCPDCLK_0 | UCPD_CFG1_TRANSWIN_3 | UCPD_CFG1_IFRGAP_4 | UCPD_CFG1_HBITCLKDIV_4)
#endif // USBPD_UCPD1_CFG1
// Initialises the USBPD subsystem
__attribute__((weak)) void usbpd_init(void) {
// Disable dead-battery signals
PWR->CR3 |= PWR_CR3_UCPD_DBDIS;
// Enable the clock for the UCPD1 peripheral
RCC->APB1ENR2 |= RCC_APB1ENR2_UCPD1EN;
// Copy the existing value
uint32_t CFG1 = UCPD1->CFG1;
// Force-disable UCPD1 before configuring
CFG1 &= ~UCPD_CFG1_UCPDEN;
// Configure UCPD1
CFG1 = USBPD_UCPD1_CFG1;
// Apply the changes
UCPD1->CFG1 = CFG1;
// Enable UCPD1
UCPD1->CFG1 |= UCPD_CFG1_UCPDEN;
// Copy the existing value
uint32_t CR = UCPD1->CR;
// Clear out ANASUBMODE (irrelevant as a sink device)
CR &= ~UCPD_CR_ANASUBMODE_Msk;
// Advertise our capabilities as a sink, with both CC lines enabled
CR |= UCPD_CR_ANAMODE | UCPD_CR_CCENABLE_Msk;
// Apply the changes
UCPD1->CR = CR;
}
// Gets the current state of the USBPD allowance
__attribute__((weak)) usbpd_allowance_t usbpd_get_allowance(void) {
uint32_t CR = UCPD1->CR;
int ucpd_enabled = (UCPD1->CFG1 & UCPD_CFG1_UCPDEN_Msk) >> UCPD_CFG1_UCPDEN_Pos;
int anamode = (CR & UCPD_CR_ANAMODE_Msk) >> UCPD_CR_ANAMODE_Pos;
int cc_enabled = (CR & UCPD_CR_CCENABLE_Msk) >> UCPD_CR_CCENABLE_Pos;
if (ucpd_enabled && anamode && cc_enabled) {
uint32_t SR = UCPD1->SR;
int vstate_cc1 = (SR & UCPD_SR_TYPEC_VSTATE_CC1_Msk) >> UCPD_SR_TYPEC_VSTATE_CC1_Pos;
int vstate_cc2 = (SR & UCPD_SR_TYPEC_VSTATE_CC2_Msk) >> UCPD_SR_TYPEC_VSTATE_CC2_Pos;
int vstate_max = vstate_cc1 > vstate_cc2 ? vstate_cc1 : vstate_cc2;
switch (vstate_max) {
case 0:
case 1:
return USBPD_500MA; // Note that this is 500mA (i.e. max USB 2.0), not 900mA, as we're not using USB 3.1 as a sink device.
case 2:
return USBPD_1500MA;
case 3:
return USBPD_3000MA;
}
}
return USBPD_500MA;
}

114
drivers/chibios/ws2812.c
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@ -1,114 +0,0 @@
#include "quantum.h"
#include "ws2812.h"
#include <ch.h>
#include <hal.h>
/* Adapted from https://github.com/bigjosh/SimpleNeoPixelDemo/ */
#ifndef NOP_FUDGE
# if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
# define NOP_FUDGE 0.4
# else
# error("NOP_FUDGE configuration required")
# define NOP_FUDGE 1 // this just pleases the compile so the above error is easier to spot
# endif
#endif
// Push Pull or Open Drain Configuration
// Default Push Pull
#ifndef WS2812_EXTERNAL_PULLUP
# define WS2812_OUTPUT_MODE PAL_MODE_OUTPUT_PUSHPULL
#else
# define WS2812_OUTPUT_MODE PAL_MODE_OUTPUT_OPENDRAIN
#endif
#define NUMBER_NOPS 6
#define CYCLES_PER_SEC (STM32_SYSCLK / NUMBER_NOPS * NOP_FUDGE)
#define NS_PER_SEC (1000000000L) // Note that this has to be SIGNED since we want to be able to check for negative values of derivatives
#define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
#define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)
#define wait_ns(x) \
do { \
for (int i = 0; i < NS_TO_CYCLES(x); i++) { \
__asm__ volatile("nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop\n\t"); \
} \
} while (0)
// These are the timing constraints taken mostly from the WS2812 datasheets
// These are chosen to be conservative and avoid problems rather than for maximum throughput
#define T1H 900 // Width of a 1 bit in ns
#define T1L (1250 - T1H) // Width of a 1 bit in ns
#define T0H 350 // Width of a 0 bit in ns
#define T0L (1250 - T0H) // Width of a 0 bit in ns
// The reset gap can be 6000 ns, but depending on the LED strip it may have to be increased
// to values like 600000 ns. If it is too small, the pixels will show nothing most of the time.
#define RES (1000 * WS2812_TRST_US) // Width of the low gap between bits to cause a frame to latch
void sendByte(uint8_t byte) {
// WS2812 protocol wants most significant bits first
for (unsigned char bit = 0; bit < 8; bit++) {
bool is_one = byte & (1 << (7 - bit));
// using something like wait_ns(is_one ? T1L : T0L) here throws off timings
if (is_one) {
// 1
writePinHigh(RGB_DI_PIN);
wait_ns(T1H);
writePinLow(RGB_DI_PIN);
wait_ns(T1L);
} else {
// 0
writePinHigh(RGB_DI_PIN);
wait_ns(T0H);
writePinLow(RGB_DI_PIN);
wait_ns(T0L);
}
}
}
void ws2812_init(void) { palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE); }
// Setleds for standard RGB
void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
static bool s_init = false;
if (!s_init) {
ws2812_init();
s_init = true;
}
// this code is very time dependent, so we need to disable interrupts
chSysLock();
for (uint8_t i = 0; i < leds; i++) {
// WS2812 protocol dictates grb order
#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
sendByte(ledarray[i].g);
sendByte(ledarray[i].r);
sendByte(ledarray[i].b);
#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
sendByte(ledarray[i].r);
sendByte(ledarray[i].g);
sendByte(ledarray[i].b);
#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
sendByte(ledarray[i].b);
sendByte(ledarray[i].g);
sendByte(ledarray[i].r);
#endif
#ifdef RGBW
sendByte(ledarray[i].w);
#endif
}
wait_ns(RES);
chSysUnlock();
}

311
drivers/chibios/ws2812_pwm.c
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#include "ws2812.h"
#include "quantum.h"
#include <hal.h>
/* Adapted from https://github.com/joewa/WS2812-LED-Driver_ChibiOS/ */
#ifdef RGBW
# error "RGBW not supported"
#endif
#ifndef WS2812_PWM_DRIVER
# define WS2812_PWM_DRIVER PWMD2 // TIMx
#endif
#ifndef WS2812_PWM_CHANNEL
# define WS2812_PWM_CHANNEL 2 // Channel
#endif
#ifndef WS2812_PWM_PAL_MODE
# define WS2812_PWM_PAL_MODE 2 // DI Pin's alternate function value
#endif
#ifndef WS2812_DMA_STREAM
# define WS2812_DMA_STREAM STM32_DMA1_STREAM2 // DMA Stream for TIMx_UP
#endif
#ifndef WS2812_DMA_CHANNEL
# define WS2812_DMA_CHANNEL 2 // DMA Channel for TIMx_UP
#endif
#if (STM32_DMA_SUPPORTS_DMAMUX == TRUE) && !defined(WS2812_DMAMUX_ID)
# error "please consult your MCU's datasheet and specify in your config.h: #define WS2812_DMAMUX_ID STM32_DMAMUX1_TIM?_UP"
#endif
#ifndef WS2812_PWM_COMPLEMENTARY_OUTPUT
# define WS2812_PWM_OUTPUT_MODE PWM_OUTPUT_ACTIVE_HIGH
#else
# if !STM32_PWM_USE_ADVANCED
# error "WS2812_PWM_COMPLEMENTARY_OUTPUT requires STM32_PWM_USE_ADVANCED == TRUE"
# endif
# define WS2812_PWM_OUTPUT_MODE PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH
#endif
// Push Pull or Open Drain Configuration
// Default Push Pull
#ifndef WS2812_EXTERNAL_PULLUP
# if defined(USE_GPIOV1)
# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
# else
# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING
# endif
#else
# if defined(USE_GPIOV1)
# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
# else
# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING
# endif
#endif
#ifndef WS2812_PWM_TARGET_PERIOD
//# define WS2812_PWM_TARGET_PERIOD 800000 // Original code is 800k...?
# define WS2812_PWM_TARGET_PERIOD 80000 // TODO: work out why 10x less on f303/f4x1
#endif
/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
#define WS2812_PWM_FREQUENCY (STM32_SYSCLK / 2) /**< Clock frequency of PWM, must be valid with respect to system clock! */
#define WS2812_PWM_PERIOD (WS2812_PWM_FREQUENCY / WS2812_PWM_TARGET_PERIOD) /**< Clock period in ticks. 1 / 800kHz = 1.25 uS (as per datasheet) */
/**
* @brief Number of bit-periods to hold the data line low at the end of a frame
*
* The reset period for each frame is defined in WS2812_TRST_US.
* Calculate the number of zeroes to add at the end assuming 1.25 uS/bit:
*/
#define WS2812_RESET_BIT_N (1000 * WS2812_TRST_US / 1250)
#define WS2812_COLOR_BIT_N (RGBLED_NUM * 24) /**< Number of data bits */
#define WS2812_BIT_N (WS2812_COLOR_BIT_N + WS2812_RESET_BIT_N) /**< Total number of bits in a frame */
/**
* @brief High period for a zero, in ticks
*
* Per the datasheet:
* WS2812:
* - T0H: 200 nS to 500 nS, inclusive
* - T0L: 650 nS to 950 nS, inclusive
* WS2812B:
* - T0H: 200 nS to 500 nS, inclusive
* - T0L: 750 nS to 1050 nS, inclusive
*
* The duty cycle is calculated for a high period of 350 nS.
*/
#define WS2812_DUTYCYCLE_0 (WS2812_PWM_FREQUENCY / (1000000000 / 350))
/**
* @brief High period for a one, in ticks
*
* Per the datasheet:
* WS2812:
* - T1H: 550 nS to 850 nS, inclusive
* - T1L: 450 nS to 750 nS, inclusive
* WS2812B:
* - T1H: 750 nS to 1050 nS, inclusive
* - T1L: 200 nS to 500 nS, inclusive
*
* The duty cycle is calculated for a high period of 800 nS.
* This is in the middle of the specifications of the WS2812 and WS2812B.
*/
#define WS2812_DUTYCYCLE_1 (WS2812_PWM_FREQUENCY / (1000000000 / 800))
/* --- PRIVATE MACROS ------------------------------------------------------- */
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given bit
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] byte: The byte number [0, 2]
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
#define WS2812_BIT(led, byte, bit) (24 * (led) + 8 * (byte) + (7 - (bit)))
#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
*
* @note The red byte is the middle byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 1, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
*
* @note The red byte is the first byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 0, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
*
* @note The red byte is the last byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit index [0, 7]
*
* @return The bit index
*/
# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
*
* @note The red byte is the middle byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 0, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
*
* @note The red byte is the first byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
*
* @note The red byte is the last byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit index [0, 7]
*
* @return The bit index
*/
# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
*
* @note The red byte is the middle byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 2, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
*
* @note The red byte is the first byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit number [0, 7]
*
* @return The bit index
*/
# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
*
* @note The red byte is the last byte in the color packet
*
* @param[in] led: The led index [0, @ref RGBLED_NUM)
* @param[in] bit: The bit index [0, 7]
*
* @return The bit index
*/
# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 0, (bit))
#endif
/* --- PRIVATE VARIABLES ---------------------------------------------------- */
static uint32_t ws2812_frame_buffer[WS2812_BIT_N + 1]; /**< Buffer for a frame */
/* --- PUBLIC FUNCTIONS ----------------------------------------------------- */
/*
* Gedanke: Double-buffer type transactions: double buffer transfers using two memory pointers for
the memory (while the DMA is reading/writing from/to a buffer, the application can
write/read to/from the other buffer).
*/
void ws2812_init(void) {
// Initialize led frame buffer
uint32_t i;
for (i = 0; i < WS2812_COLOR_BIT_N; i++) ws2812_frame_buffer[i] = WS2812_DUTYCYCLE_0; // All color bits are zero duty cycle
for (i = 0; i < WS2812_RESET_BIT_N; i++) ws2812_frame_buffer[i + WS2812_COLOR_BIT_N] = 0; // All reset bits are zero
palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE);
// PWM Configuration
//#pragma GCC diagnostic ignored "-Woverride-init" // Turn off override-init warning for this struct. We use the overriding ability to set a "default" channel config
static const PWMConfig ws2812_pwm_config = {
.frequency = WS2812_PWM_FREQUENCY,
.period = WS2812_PWM_PERIOD, // Mit dieser Periode wird UDE-Event erzeugt und ein neuer Wert (Länge WS2812_BIT_N) vom DMA ins CCR geschrieben
.callback = NULL,
.channels =
{
[0 ... 3] = {.mode = PWM_OUTPUT_DISABLED, .callback = NULL}, // Channels default to disabled
[WS2812_PWM_CHANNEL - 1] = {.mode = WS2812_PWM_OUTPUT_MODE, .callback = NULL}, // Turn on the channel we care about
},
.cr2 = 0,
.dier = TIM_DIER_UDE, // DMA on update event for next period
};
//#pragma GCC diagnostic pop // Restore command-line warning options
// Configure DMA
// dmaInit(); // Joe added this
dmaStreamAlloc(WS2812_DMA_STREAM - STM32_DMA_STREAM(0), 10, NULL, NULL);
dmaStreamSetPeripheral(WS2812_DMA_STREAM, &(WS2812_PWM_DRIVER.tim->CCR[WS2812_PWM_CHANNEL - 1])); // Ziel ist der An-Zeit im Cap-Comp-Register
dmaStreamSetMemory0(WS2812_DMA_STREAM, ws2812_frame_buffer);
dmaStreamSetTransactionSize(WS2812_DMA_STREAM, WS2812_BIT_N);
dmaStreamSetMode(WS2812_DMA_STREAM, STM32_DMA_CR_CHSEL(WS2812_DMA_CHANNEL) | STM32_DMA_CR_DIR_M2P | STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_WORD | STM32_DMA_CR_MINC | STM32_DMA_CR_CIRC | STM32_DMA_CR_PL(3));
// M2P: Memory 2 Periph; PL: Priority Level
#if (STM32_DMA_SUPPORTS_DMAMUX == TRUE)
// If the MCU has a DMAMUX we need to assign the correct resource
dmaSetRequestSource(WS2812_DMA_STREAM, WS2812_DMAMUX_ID);
#endif
// Start DMA
dmaStreamEnable(WS2812_DMA_STREAM);
// Configure PWM
// NOTE: It's required that preload be enabled on the timer channel CCR register. This is currently enabled in the
// ChibiOS driver code, so we don't have to do anything special to the timer. If we did, we'd have to start the timer,
// disable counting, enable the channel, and then make whatever configuration changes we need.
pwmStart(&WS2812_PWM_DRIVER, &ws2812_pwm_config);
pwmEnableChannel(&WS2812_PWM_DRIVER, WS2812_PWM_CHANNEL - 1, 0); // Initial period is 0; output will be low until first duty cycle is DMA'd in
}
void ws2812_write_led(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b) {
// Write color to frame buffer
for (uint8_t bit = 0; bit < 8; bit++) {
ws2812_frame_buffer[WS2812_RED_BIT(led_number, bit)] = ((r >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
ws2812_frame_buffer[WS2812_GREEN_BIT(led_number, bit)] = ((g >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
ws2812_frame_buffer[WS2812_BLUE_BIT(led_number, bit)] = ((b >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
}
}
// Setleds for standard RGB
void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) {
static bool s_init = false;
if (!s_init) {
ws2812_init();
s_init = true;
}
for (uint16_t i = 0; i < leds; i++) {
ws2812_write_led(i, ledarray[i].r, ledarray[i].g, ledarray[i].b);
}
}

159
drivers/chibios/ws2812_spi.c
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@ -1,159 +0,0 @@
#include "quantum.h"
#include "ws2812.h"
/* Adapted from https://github.com/gamazeps/ws2812b-chibios-SPIDMA/ */
#ifdef RGBW
# error "RGBW not supported"
#endif
// Define the spi your LEDs are plugged to here
#ifndef WS2812_SPI
# define WS2812_SPI SPID1
#endif
#ifndef WS2812_SPI_MOSI_PAL_MODE
# define WS2812_SPI_MOSI_PAL_MODE 5
#endif
#ifndef WS2812_SPI_SCK_PAL_MODE
# define WS2812_SPI_SCK_PAL_MODE 5
#endif
// Push Pull or Open Drain Configuration
// Default Push Pull
#ifndef WS2812_EXTERNAL_PULLUP
# if defined(USE_GPIOV1)
# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
# else
# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL
# endif
#else
# if defined(USE_GPIOV1)
# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
# else
# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN
# endif
#endif
// Define SPI config speed
// baudrate should target 3.2MHz
// F072 fpclk = 48MHz
// 48/16 = 3Mhz
#if WS2812_SPI_DIVISOR == 2
# define WS2812_SPI_DIVISOR (0)
#elif WS2812_SPI_DIVISOR == 4
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_0)
#elif WS2812_SPI_DIVISOR == 8
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_1)
#elif WS2812_SPI_DIVISOR == 16 // same as default
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_1 | SPI_CR1_BR_0)
#elif WS2812_SPI_DIVISOR == 32
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2)
#elif WS2812_SPI_DIVISOR == 64
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2 | SPI_CR1_BR_0)
#elif WS2812_SPI_DIVISOR == 128
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2 | SPI_CR1_BR_1)
#elif WS2812_SPI_DIVISOR == 256
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0)
#else
# define WS2812_SPI_DIVISOR (SPI_CR1_BR_1 | SPI_CR1_BR_0) // default
#endif
// Use SPI circular buffer
#ifdef WS2812_SPI_USE_CIRCULAR_BUFFER
# define WS2812_SPI_BUFFER_MODE 1 // circular buffer
#else
# define WS2812_SPI_BUFFER_MODE 0 // normal buffer
#endif
#if defined(USE_GPIOV1)
# define WS2812_SCK_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
#else
# define WS2812_SCK_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL
#endif
#define BYTES_FOR_LED_BYTE 4
#define NB_COLORS 3
#define BYTES_FOR_LED (BYTES_FOR_LED_BYTE * NB_COLORS)
#define DATA_SIZE (BYTES_FOR_LED * RGBLED_NUM)
#define RESET_SIZE (1000 * WS2812_TRST_US / (2 * 1250))
#define PREAMBLE_SIZE 4
static uint8_t txbuf[PREAMBLE_SIZE + DATA_SIZE + RESET_SIZE] = {0};
/*
* As the trick here is to use the SPI to send a huge pattern of 0 and 1 to
* the ws2812b protocol, we use this helper function to translate bytes into
* 0s and 1s for the LED (with the appropriate timing).
*/
static uint8_t get_protocol_eq(uint8_t data, int pos) {
uint8_t eq = 0;
if (data & (1 << (2 * (3 - pos))))
eq = 0b1110;
else
eq = 0b1000;
if (data & (2 << (2 * (3 - pos))))
eq += 0b11100000;
else
eq += 0b10000000;
return eq;
}
static void set_led_color_rgb(LED_TYPE color, int pos) {
uint8_t* tx_start = &txbuf[PREAMBLE_SIZE];
#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.g, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.r, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.b, j);
#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.r, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.g, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.b, j);
#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.b, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.g, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.r, j);
#endif
}
void ws2812_init(void) {
palSetLineMode(RGB_DI_PIN, WS2812_MOSI_OUTPUT_MODE);
#ifdef WS2812_SPI_SCK_PIN
palSetLineMode(WS2812_SPI_SCK_PIN, WS2812_SCK_OUTPUT_MODE);
#endif // WS2812_SPI_SCK_PIN
// TODO: more dynamic baudrate
static const SPIConfig spicfg = {WS2812_SPI_BUFFER_MODE, NULL, PAL_PORT(RGB_DI_PIN), PAL_PAD(RGB_DI_PIN), WS2812_SPI_DIVISOR};
spiAcquireBus(&WS2812_SPI); /* Acquire ownership of the bus. */
spiStart(&WS2812_SPI, &spicfg); /* Setup transfer parameters. */
spiSelect(&WS2812_SPI); /* Slave Select assertion. */
#ifdef WS2812_SPI_USE_CIRCULAR_BUFFER
spiStartSend(&WS2812_SPI, sizeof(txbuf) / sizeof(txbuf[0]), txbuf);
#endif
}
void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) {
static bool s_init = false;
if (!s_init) {
ws2812_init();
s_init = true;
}
for (uint8_t i = 0; i < leds; i++) {
set_led_color_rgb(ledarray[i], i);
}
// Send async - each led takes ~0.03ms, 50 leds ~1.5ms, animations flushing faster than send will cause issues.
// Instead spiSend can be used to send synchronously (or the thread logic can be added back).
#ifndef WS2812_SPI_USE_CIRCULAR_BUFFER
# ifdef WS2812_SPI_SYNC
spiSend(&WS2812_SPI, sizeof(txbuf) / sizeof(txbuf[0]), txbuf);
# else
spiStartSend(&WS2812_SPI, sizeof(txbuf) / sizeof(txbuf[0]), txbuf);
# endif
#endif
}

96
drivers/eeprom/eeprom_stm32_L0_L1.c
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@ -1,96 +0,0 @@
/* Copyright 2020 Nick Brassel (tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <string.h>
#include <hal.h>
#include "eeprom_driver.h"
#include "eeprom_stm32_L0_L1.h"
#define EEPROM_BASE_ADDR 0x08080000
#define EEPROM_ADDR(offset) (EEPROM_BASE_ADDR + (offset))
#define EEPROM_PTR(offset) ((__IO uint8_t *)EEPROM_ADDR(offset))
#define EEPROM_BYTE(location, offset) (*(EEPROM_PTR(((uint32_t)location) + ((uint32_t)offset))))
#define BUFFER_BYTE(buffer, offset) (*(((uint8_t *)buffer) + offset))
#define FLASH_PEKEY1 0x89ABCDEF
#define FLASH_PEKEY2 0x02030405
static inline void STM32_L0_L1_EEPROM_WaitNotBusy(void) {
while (FLASH->SR & FLASH_SR_BSY) {
__WFI();
}
}
static inline void STM32_L0_L1_EEPROM_Unlock(void) {
STM32_L0_L1_EEPROM_WaitNotBusy();
if (FLASH->PECR & FLASH_PECR_PELOCK) {
FLASH->PEKEYR = FLASH_PEKEY1;
FLASH->PEKEYR = FLASH_PEKEY2;
}
}
static inline void STM32_L0_L1_EEPROM_Lock(void) {
STM32_L0_L1_EEPROM_WaitNotBusy();
FLASH->PECR |= FLASH_PECR_PELOCK;
}
void eeprom_driver_init(void) {}
void eeprom_driver_erase(void) {
STM32_L0_L1_EEPROM_Unlock();
for (size_t offset = 0; offset < STM32_ONBOARD_EEPROM_SIZE; offset += sizeof(uint32_t)) {
FLASH->PECR |= FLASH_PECR_ERASE | FLASH_PECR_DATA;
*(__IO uint32_t *)EEPROM_ADDR(offset) = (uint32_t)0;
STM32_L0_L1_EEPROM_WaitNotBusy();
FLASH->PECR &= ~(FLASH_PECR_ERASE | FLASH_PECR_DATA);
}
STM32_L0_L1_EEPROM_Lock();
}
void eeprom_read_block(void *buf, const void *addr, size_t len) {
for (size_t offset = 0; offset < len; ++offset) {
// Drop out if we've hit the limit of the EEPROM
if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) {
break;
}
STM32_L0_L1_EEPROM_WaitNotBusy();
BUFFER_BYTE(buf, offset) = EEPROM_BYTE(addr, offset);
}
}
void eeprom_write_block(const void *buf, void *addr, size_t len) {
STM32_L0_L1_EEPROM_Unlock();
for (size_t offset = 0; offset < len; ++offset) {
// Drop out if we've hit the limit of the EEPROM
if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) {
break;
}
STM32_L0_L1_EEPROM_WaitNotBusy();
EEPROM_BYTE(addr, offset) = BUFFER_BYTE(buf, offset);
}
STM32_L0_L1_EEPROM_Lock();
}

33
drivers/eeprom/eeprom_stm32_L0_L1.h
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@ -1,33 +0,0 @@
/* Copyright 2020 Nick Brassel (tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
/*
The size used by the STM32 L0/L1 EEPROM driver.
*/
#ifndef STM32_ONBOARD_EEPROM_SIZE
# ifdef VIA_ENABLE
# define STM32_ONBOARD_EEPROM_SIZE 1024
# else
# include "eeconfig.h"
# define STM32_ONBOARD_EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO and EEPROM page sizing
# endif
#endif
#if STM32_ONBOARD_EEPROM_SIZE > 128
# pragma message("Please note: resetting EEPROM using an STM32L0/L1 device takes up to 1 second for every 1kB of internal EEPROM used.")
#endif