diff options
Diffstat (limited to 'drivers/chibios/ws2812_spi.c')
| -rw-r--r-- | drivers/chibios/ws2812_spi.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/drivers/chibios/ws2812_spi.c b/drivers/chibios/ws2812_spi.c deleted file mode 100644 index 377a929b94..0000000000 --- a/drivers/chibios/ws2812_spi.c +++ /dev/null @@ -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 -} |