pwm ws driver (not working)
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Jack Humbert
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11 changed files with 352 additions and 631 deletions
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/*
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/**
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* @file ws2812.h
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* @author Austin Glaser <austin.glaser@gmail.com>
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* @brief Interface to WS2812 LED driver
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*
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* Copyright (C) 2016 Austin Glaser
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*
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* This software may be modified and distributed under the terms
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* of the MIT license. See the LICENSE file for details.
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*
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* @todo Put in names and descriptions of variables which need to be defined to use this file
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*/
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WS2812B CPU and memory efficient library
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#ifndef WS2812_H_
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#define WS2812_H_
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Date: 28.9.2016
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/**
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* @defgroup WS2812 WS2812 Driver
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* @{
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*
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* @brief DMA-based WS2812 LED driver
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*
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* A driver for WS2812 LEDs
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*/
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Author: Martin Hubacek
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http://www.martinhubacek.cz
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@hubmartin
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/* --- PUBLIC DEPENDENCIES -------------------------------------------------- */
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Licence: MIT License
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// Standard
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#include <stdint.h>
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#include "rgblight_types.h"
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*/
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/* --- PUBLIC CONSTANTS ----------------------------------------------------- */
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#ifndef WS2812B_H_
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#define WS2812B_H_
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#include "ws2812.h"
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/**
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* @brief Return codes from ws2812 interface functions
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*/
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typedef enum {
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WS2812_SUCCESS = 0x00, /**< Operation completeed successfully */
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WS2812_LED_INVALID, /**< Attempted to index an invalid LED (@ref WS2812_N_LEDS) */
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MAX_WS2812_ERR, /**< Total number of possible error codes */
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WS2812_ERR_INVALID /**< Invalid error value */
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} ws2812_err_t;
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// GPIO enable command
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#define WS2812B_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
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// LED output port
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#define WS2812B_PORT GPIOC
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// LED output pins
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#define WS2812B_PINS (GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3)
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// How many LEDs are in the series
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#define WS2812B_NUMBER_OF_LEDS 60
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/* --- PUBLIC FUNCTIONS ----------------------------------------------------- */
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// Number of output LED strips. Each has its own buffer.
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#define WS2812_BUFFER_COUNT 2
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/**
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* @brief Initialize the driver
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*
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* After this function is called, all necessary background tasks will be started.
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* The frame is initially dark.
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*/
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void ws2812_init(void);
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// Choose one of the bit-juggling setpixel implementation
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// *******************************************************
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//#define SETPIX_1 // For loop, works everywhere, slow
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//#define SETPIX_2 // Bit band in a loop
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//#define SETPIX_3 // Like SETPIX_1 but with unrolled loop
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#define SETPIX_4 // Fastest copying using bit-banding
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/**
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* @brief Write the value of a single LED in the chain
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*
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* The color value is written to a frame buffer, and will not
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* be updated until the next frame is written. Frames are written
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* at the maximum possible speed -- the longest latency between a
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* call to this function and the value being displayed is
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* 1.25uS*(24*@ref WS2812_LED_N + 50)
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*
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* @param[in] led_number: The index of the LED to be written. Must be strictly less than
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* @ref WS2812_N_LEDS
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* @param[in] r: The red level of the LED
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* @param[in] g: The green level of the LED
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* @param[in] b: The blue level of the LED
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*
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* @retval WS2812_SUCCESS: The write was successful
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* @retval WS2812_LED_INVALID: The write was to an invalid LED index
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*/
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ws2812_err_t ws2812_write_led(uint32_t led_number, uint8_t r, uint8_t g, uint8_t b);
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/** @} defgroup WS2812 */
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// DEBUG OUTPUT
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// ********************
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#define LED4_PORT GPIOC
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#define LED4_PIN GPIO_PIN_10
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void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds);
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void ws2812_setleds_rgbw(LED_TYPE *ledarray, uint16_t number_of_leds);
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#define LED5_PORT GPIOC
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#define LED5_PIN GPIO_PIN_10
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/**
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* @brief Concatenates two symbols s1 and s2 exactly, without expanding either
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*
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* @param[in] s1: The first symbol to concatenate
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* @param[in] s2: The second symbol to concatenate
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*
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* @return A single symbol containing s1 and s2 concatenated without expansion
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*/
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#define CONCAT_SYMBOLS(s1, s2) s1##s2
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/**
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* @brief Concatenate the symbols s1 and s2, expanding both of them
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*
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* This is important because simply applying s1##s2 doesn't expand them if they're
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* preprocessor tokens themselves
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*
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* @param[in] s1: The first symbol to concatenate
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* @param[in] s2: The second symbol to concatenate
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*
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* @return A single symbol containing s1 expanded followed by s2 expanded
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*/
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#define CONCAT_EXPANDED_SYMBOLS(s1, s2) CONCAT_SYMBOLS(s1, s2)
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// Public functions
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// ****************
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void ws2812b_init();
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void ws2812b_handle();
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// Library structures
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// ******************
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// This value sets number of periods to generate 50uS Treset signal
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#define WS2812_RESET_PERIOD 12
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typedef struct WS2812_BufferItem {
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uint8_t* frameBufferPointer;
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uint32_t frameBufferSize;
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uint32_t frameBufferCounter;
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uint8_t channel; // digital output pin/channel
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} WS2812_BufferItem;
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typedef struct WS2812_Struct
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{
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WS2812_BufferItem item[WS2812_BUFFER_COUNT];
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uint8_t transferComplete;
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uint8_t startTransfer;
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uint32_t timerPeriodCounter;
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uint32_t repeatCounter;
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} WS2812_Struct;
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WS2812_Struct ws2812b;
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// Bit band stuff
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#define RAM_BASE 0x20000000
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#define RAM_BB_BASE 0x22000000
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#define Var_ResetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 0)
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#define Var_SetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 1)
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#define Var_GetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)))
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#define BITBAND_SRAM(address, bit) ( (__IO uint32_t *) (RAM_BB_BASE + (((uint32_t)address) - RAM_BASE) * 32 + (bit) * 4))
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#define varSetBit(var,bit) (Var_SetBit_BB((uint32_t)&var,bit))
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#define varResetBit(var,bit) (Var_ResetBit_BB((uint32_t)&var,bit))
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#define varGetBit(var,bit) (Var_GetBit_BB((uint32_t)&var,bit))
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static void ws2812b_set_pixel(uint8_t row, uint16_t column, uint8_t red, uint8_t green, uint8_t blue);
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void DMA_TransferCompleteHandler(DMA_HandleTypeDef *DmaHandle);
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void DMA_TransferHalfHandler(DMA_HandleTypeDef *DmaHandle);
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#endif /* WS2812B_H_ */
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#endif /* WS2812_H_ */
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