217 lines
7 KiB
C
217 lines
7 KiB
C
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <avr/io.h>
|
|
#include <avr/eeprom.h>
|
|
#include <avr/interrupt.h>
|
|
#include <avr/wdt.h>
|
|
#include <util/delay.h>
|
|
#include "bootloader.h"
|
|
|
|
#ifdef PROTOCOL_LUFA
|
|
#include <LUFA/Drivers/USB/USB.h>
|
|
#endif
|
|
|
|
|
|
/* Bootloader Size in *bytes*
|
|
*
|
|
* AVR Boot section size are defined by setting BOOTSZ fuse in fact. Consult with your MCU datasheet.
|
|
* Note that 'Word'(2 bytes) size and address are used in datasheet while TMK uses 'Byte'.
|
|
*
|
|
*
|
|
* Size of Bootloaders in bytes:
|
|
* Atmel DFU loader(ATmega32U4) 4096
|
|
* Atmel DFU loader(AT90USB128) 8192
|
|
* LUFA bootloader(ATmega32U4) 4096
|
|
* Arduino Caterina(ATmega32U4) 4096
|
|
* USBaspLoader(ATmega***) 2048
|
|
* Teensy halfKay(ATmega32U4) 512
|
|
* Teensy++ halfKay(AT90USB128) 1024
|
|
*
|
|
*
|
|
* AVR Boot section is located at the end of Flash memory like the followings.
|
|
*
|
|
*
|
|
* byte Atmel/LUFA(ATMega32u4) byte Atmel(AT90SUB128)
|
|
* 0x0000 +---------------+ 0x00000 +---------------+
|
|
* | | | |
|
|
* | | | |
|
|
* | Application | | Application |
|
|
* | | | |
|
|
* = = = =
|
|
* | | 32KB-4KB | | 128KB-8KB
|
|
* 0x7000 +---------------+ 0x1E000 +---------------+
|
|
* | Bootloader | 4KB | Bootloader | 8KB
|
|
* 0x7FFF +---------------+ 0x1FFFF +---------------+
|
|
*
|
|
*
|
|
* byte Teensy(ATMega32u4) byte Teensy++(AT90SUB128)
|
|
* 0x0000 +---------------+ 0x00000 +---------------+
|
|
* | | | |
|
|
* | | | |
|
|
* | Application | | Application |
|
|
* | | | |
|
|
* = = = =
|
|
* | | 32KB-512B | | 128KB-1KB
|
|
* 0x7E00 +---------------+ 0x1FC00 +---------------+
|
|
* | Bootloader | 512B | Bootloader | 1KB
|
|
* 0x7FFF +---------------+ 0x1FFFF +---------------+
|
|
*/
|
|
#ifndef BOOTLOADER_SIZE
|
|
#warning To use bootloader_jump() you need to define BOOTLOADER_SIZE in config.h.
|
|
#define BOOTLOADER_SIZE 4096
|
|
#endif
|
|
|
|
#define FLASH_SIZE (FLASHEND + 1L)
|
|
#define BOOTLOADER_START (FLASH_SIZE - BOOTLOADER_SIZE)
|
|
|
|
|
|
/*
|
|
* Entering the Bootloader via Software
|
|
* http://www.fourwalledcubicle.com/files/LUFA/Doc/120730/html/_page__software_bootloader_start.html
|
|
*/
|
|
#define BOOTLOADER_RESET_KEY 0xB007B007
|
|
uint32_t reset_key __attribute__ ((section (".noinit")));
|
|
|
|
/* initialize MCU status by watchdog reset */
|
|
void bootloader_jump(void) {
|
|
#ifndef CATERINA_BOOTLOADER
|
|
|
|
#ifdef PROTOCOL_LUFA
|
|
USB_Disable();
|
|
cli();
|
|
_delay_ms(2000);
|
|
#endif
|
|
|
|
#ifdef PROTOCOL_PJRC
|
|
cli();
|
|
UDCON = 1;
|
|
USBCON = (1<<FRZCLK);
|
|
UCSR1B = 0;
|
|
_delay_ms(5);
|
|
#endif
|
|
|
|
#ifdef BOOTLOADHID_BOOTLOADER
|
|
// force bootloadHID to stay in bootloader mode, so that it waits
|
|
// for a new firmware to be flashed
|
|
eeprom_write_byte((uint8_t *)1, 0x00);
|
|
#endif
|
|
|
|
// watchdog reset
|
|
reset_key = BOOTLOADER_RESET_KEY;
|
|
wdt_enable(WDTO_250MS);
|
|
for (;;);
|
|
|
|
#else
|
|
// this block may be optional
|
|
// TODO: figure it out
|
|
|
|
uint16_t *const bootKeyPtr = (uint16_t *)0x0800;
|
|
|
|
// Value used by Caterina bootloader use to determine whether to run the
|
|
// sketch or the bootloader programmer.
|
|
uint16_t bootKey = 0x7777;
|
|
|
|
*bootKeyPtr = bootKey;
|
|
|
|
// setup watchdog timeout
|
|
wdt_enable(WDTO_60MS);
|
|
|
|
while(1) {} // wait for watchdog timer to trigger
|
|
|
|
#endif
|
|
}
|
|
|
|
#ifdef __AVR_ATmega32A__
|
|
// MCUSR is actually called MCUCSR in ATmega32A
|
|
#define MCUSR MCUCSR
|
|
#endif
|
|
|
|
/* this runs before main() */
|
|
void bootloader_jump_after_watchdog_reset(void) __attribute__ ((used, naked, section (".init3")));
|
|
void bootloader_jump_after_watchdog_reset(void)
|
|
{
|
|
if ((MCUSR & (1<<WDRF)) && reset_key == BOOTLOADER_RESET_KEY) {
|
|
reset_key = 0;
|
|
|
|
// My custom USBasploader requires this to come up.
|
|
MCUSR = 0;
|
|
|
|
// Seems like Teensy halfkay loader requires clearing WDRF and disabling watchdog.
|
|
MCUSR &= ~(1<<WDRF);
|
|
wdt_disable();
|
|
|
|
// This is compled into 'icall', address should be in word unit, not byte.
|
|
((void (*)(void))(BOOTLOADER_START/2))();
|
|
}
|
|
}
|
|
|
|
|
|
#if 0
|
|
/* Jumping To The Bootloader
|
|
* http://www.pjrc.com/teensy/jump_to_bootloader.html
|
|
*
|
|
* This method doen't work when using LUFA. idk why.
|
|
* - needs to initialize more regisers or interrupt setting?
|
|
*/
|
|
void bootloader_jump(void) {
|
|
#ifdef PROTOCOL_LUFA
|
|
USB_Disable();
|
|
cli();
|
|
_delay_ms(2000);
|
|
#endif
|
|
|
|
#ifdef PROTOCOL_PJRC
|
|
cli();
|
|
UDCON = 1;
|
|
USBCON = (1<<FRZCLK);
|
|
UCSR1B = 0;
|
|
_delay_ms(5);
|
|
#endif
|
|
|
|
/*
|
|
* Initialize
|
|
*/
|
|
#if defined(__AVR_AT90USB162__)
|
|
EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
|
|
DDRB = 0; DDRC = 0; DDRD = 0;
|
|
PORTB = 0; PORTC = 0; PORTD = 0;
|
|
#elif defined(__AVR_ATmega32U4__)
|
|
EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
|
|
DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
|
|
PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
|
|
#elif defined(__AVR_AT90USB646__)
|
|
EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
|
|
DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
|
|
PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
|
|
#elif defined(__AVR_AT90USB1286__)
|
|
EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
|
|
DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
|
|
PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
|
|
#endif
|
|
|
|
/*
|
|
* USBaspLoader
|
|
*/
|
|
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__)
|
|
// This makes custom USBasploader come up.
|
|
MCUSR = 0;
|
|
|
|
// initialize ports
|
|
PORTB = 0; PORTC= 0; PORTD = 0;
|
|
DDRB = 0; DDRC= 0; DDRD = 0;
|
|
|
|
// disable interrupts
|
|
EIMSK = 0; EECR = 0; SPCR = 0;
|
|
ACSR = 0; SPMCSR = 0; WDTCSR = 0; PCICR = 0;
|
|
TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0;
|
|
ADCSRA = 0; TWCR = 0; UCSR0B = 0;
|
|
#endif
|
|
|
|
// This is compled into 'icall', address should be in word unit, not byte.
|
|
((void (*)(void))(BOOTLOADER_START/2))();
|
|
}
|
|
#endif
|