diff options
| -rw-r--r-- | platforms/chibios/drivers/ws2812_pwm.c | 38 | ||||
| -rw-r--r-- | platforms/chibios/drivers/ws2812_spi.c | 15 |
2 files changed, 44 insertions, 9 deletions
diff --git a/platforms/chibios/drivers/ws2812_pwm.c b/platforms/chibios/drivers/ws2812_pwm.c index 48d81cc876..c17b9cd4e5 100644 --- a/platforms/chibios/drivers/ws2812_pwm.c +++ b/platforms/chibios/drivers/ws2812_pwm.c @@ -5,7 +5,9 @@ /* Adapted from https://github.com/joewa/WS2812-LED-Driver_ChibiOS/ */ #ifdef RGBW -# error "RGBW not supported" +# define WS2812_CHANNELS 4 +#else +# define WS2812_CHANNELS 3 #endif #ifndef WS2812_PWM_DRIVER @@ -68,8 +70,9 @@ * 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_COLOR_BITS (WS2812_CHANNELS * 8) #define WS2812_RESET_BIT_N (1000 * WS2812_TRST_US / 1250) -#define WS2812_COLOR_BIT_N (RGBLED_NUM * 24) /**< Number of data bits */ +#define WS2812_COLOR_BIT_N (RGBLED_NUM * WS2812_COLOR_BITS) /**< Number of data bits */ #define WS2812_BIT_N (WS2812_COLOR_BIT_N + WS2812_RESET_BIT_N) /**< Total number of bits in a frame */ /** @@ -114,7 +117,7 @@ * * @return The bit index */ -#define WS2812_BIT(led, byte, bit) (24 * (led) + 8 * (byte) + (7 - (bit))) +#define WS2812_BIT(led, byte, bit) (WS2812_COLOR_BITS * (led) + 8 * (byte) + (7 - (bit))) #if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB) /** @@ -228,6 +231,20 @@ # define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 0, (bit)) #endif +#ifdef RGBW +/** + * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given white bit + * + * @note The white byte is the last byte in the color packet + * + * @param[in] led: The led index [0, @ref WS2812_LED_N) + * @param[in] bit: The bit index [0, 7] + * + * @return The bit index + */ +# define WS2812_WHITE_BIT(led, bit) WS2812_BIT((led), 3, (bit)) +#endif + /* --- PRIVATE VARIABLES ---------------------------------------------------- */ static uint32_t ws2812_frame_buffer[WS2812_BIT_N + 1]; /**< Buffer for a frame */ @@ -296,6 +313,17 @@ void ws2812_write_led(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b) { ws2812_frame_buffer[WS2812_BLUE_BIT(led_number, bit)] = ((b >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0; } } +void ws2812_write_led_rgbw(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b, uint8_t w) { + // 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; +#ifdef RGBW + ws2812_frame_buffer[WS2812_WHITE_BIT(led_number, bit)] = ((w >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0; +#endif + } +} // Setleds for standard RGB void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) { @@ -306,6 +334,10 @@ void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) { } for (uint16_t i = 0; i < leds; i++) { +#ifdef RGBW + ws2812_write_led_rgbw(i, ledarray[i].r, ledarray[i].g, ledarray[i].b, ledarray[i].w); +#else ws2812_write_led(i, ledarray[i].r, ledarray[i].g, ledarray[i].b); +#endif } } diff --git a/platforms/chibios/drivers/ws2812_spi.c b/platforms/chibios/drivers/ws2812_spi.c index 589bf85c35..62722f466e 100644 --- a/platforms/chibios/drivers/ws2812_spi.c +++ b/platforms/chibios/drivers/ws2812_spi.c @@ -3,10 +3,6 @@ /* 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 @@ -74,8 +70,12 @@ #endif #define BYTES_FOR_LED_BYTE 4 -#define NB_COLORS 3 -#define BYTES_FOR_LED (BYTES_FOR_LED_BYTE * NB_COLORS) +#ifdef RGBW +# define WS2812_CHANNELS 4 +#else +# define WS2812_CHANNELS 3 +#endif +#define BYTES_FOR_LED (BYTES_FOR_LED_BYTE * WS2812_CHANNELS) #define DATA_SIZE (BYTES_FOR_LED * RGBLED_NUM) #define RESET_SIZE (1000 * WS2812_TRST_US / (2 * 1250)) #define PREAMBLE_SIZE 4 @@ -116,6 +116,9 @@ static void set_led_color_rgb(LED_TYPE color, int pos) { 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 +#ifdef RGBW + for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 4 + j] = get_protocol_eq(color.w, j); +#endif } void ws2812_init(void) { |