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272 lines
6.8 KiB
272 lines
6.8 KiB
/* |
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* ws2812b.c |
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* |
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* The MIT License. |
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* Created on: 14.07.2017 |
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* Author: Mateusz Salamon |
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* www.msalamon.pl |
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* mateusz@msalamon.pl |
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*/ |
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#include "stm32f1xx_hal.h" |
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#include "spi.h" |
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#include "dma.h" |
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#include "gpio.h" |
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#include "math.h" |
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#include "ws2812b.h" |
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#define zero 0b00000011 |
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#define one 0b00011111 |
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SPI_HandleTypeDef *hspi_ws2812b; |
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ws2812b_color ws2812b_array[WS2812B_LEDS]; |
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static uint8_t buffer[48]; |
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static uint16_t CurrentLed; |
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static uint8_t ResetSignal; |
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void WS2812B_Init(SPI_HandleTypeDef * spi_handler) |
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{ |
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hspi_ws2812b = spi_handler; |
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} |
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void WS2812B_SetDiodeColor(int16_t diode_id, ws2812b_color color) |
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{ |
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if(diode_id >= WS2812B_LEDS || diode_id < 0) return; |
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ws2812b_array[diode_id] = color; |
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} |
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void WS2812B_SetDiodeRGB(int16_t diode_id, uint8_t R, uint8_t G, uint8_t B) |
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{ |
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if(diode_id >= WS2812B_LEDS || diode_id < 0) return; |
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ws2812b_array[diode_id].red = R; |
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ws2812b_array[diode_id].green = G; |
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ws2812b_array[diode_id].blue = B; |
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} |
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// |
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// Set diode with HSV model |
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// |
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// Hue 0-359 |
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// Saturation 0-255 |
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// Birghtness(Value) 0-255 |
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// |
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void WS2812B_SetDiodeHSV(int16_t diode_id, uint16_t Hue, uint8_t Saturation, uint8_t Brightness) |
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{ |
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if(diode_id >= WS2812B_LEDS || diode_id < 0) return; |
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uint16_t Sector, Fracts, p, q, t; |
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if(Saturation == 0) |
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{ |
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ws2812b_array[diode_id].red = Brightness; |
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ws2812b_array[diode_id].green = Brightness; |
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ws2812b_array[diode_id]. blue = Brightness; |
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} |
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else |
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{ |
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if(Hue >= 360) Hue = 359; |
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Sector = Hue / 60; // Sector 0 to 5 |
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Fracts = Hue % 60; |
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p = (Brightness * (255 - Saturation)) / 256; |
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q = (Brightness * (255 - (Saturation * Fracts)/360)) / 256; |
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t = (Brightness * (255 - (Saturation * (360 - Fracts))/360)) / 256; |
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switch(Sector) |
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{ |
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case 0: |
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ws2812b_array[diode_id].red = Brightness; |
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ws2812b_array[diode_id].green = (uint8_t)t; |
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ws2812b_array[diode_id]. blue = (uint8_t)p; |
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break; |
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case 1: |
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ws2812b_array[diode_id].red = (uint8_t)q; |
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ws2812b_array[diode_id].green = Brightness; |
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ws2812b_array[diode_id]. blue = (uint8_t)p; |
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break; |
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case 2: |
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ws2812b_array[diode_id].red = (uint8_t)p; |
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ws2812b_array[diode_id].green = Brightness; |
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ws2812b_array[diode_id]. blue = (uint8_t)t; |
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break; |
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case 3: |
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ws2812b_array[diode_id].red = (uint8_t)p; |
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ws2812b_array[diode_id].green = (uint8_t)q; |
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ws2812b_array[diode_id]. blue = Brightness; |
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break; |
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case 4: |
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ws2812b_array[diode_id].red = (uint8_t)t; |
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ws2812b_array[diode_id].green = (uint8_t)p; |
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ws2812b_array[diode_id]. blue = Brightness; |
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break; |
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default: // case 5: |
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ws2812b_array[diode_id].red = Brightness; |
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ws2812b_array[diode_id].green = (uint8_t)p; |
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ws2812b_array[diode_id]. blue = (uint8_t)q; |
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break; |
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} |
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} |
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} |
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void WS2812B_Refresh() |
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{ |
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CurrentLed = 0; |
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ResetSignal = 0; |
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for(uint8_t i = 0; i < 48; i++) |
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buffer[i] = 0x00; |
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HAL_SPI_Transmit_DMA(hspi_ws2812b, buffer, 48); // Additional 3 for reset signal |
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while(HAL_DMA_STATE_READY != HAL_DMA_GetState(hspi_ws2812b->hdmatx)); |
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} |
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void HAL_SPI_TxHalfCpltCallback(SPI_HandleTypeDef *hspi) |
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{ |
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if(hspi == hspi_ws2812b) |
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{ |
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if(!ResetSignal) |
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{ |
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for(uint8_t k = 0; k < 24; k++) // To 72 impulses of reset |
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{ |
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buffer[k] = 0x00; |
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} |
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ResetSignal = 1; // End reset signal |
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} |
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else // LEDs Odd 1,3,5,7... |
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{ |
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if(CurrentLed > WS2812B_LEDS) |
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{ |
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HAL_SPI_DMAStop(hspi_ws2812b); |
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} |
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else |
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{ |
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uint8_t j = 0; |
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//GREEN |
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for(int8_t k=7; k>=0; k--) |
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{ |
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if((ws2812b_array[CurrentLed].green & (1<<k)) == 0) |
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buffer[j] = zero; |
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else |
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buffer[j] = one; |
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j++; |
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} |
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//RED |
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for(int8_t k=7; k>=0; k--) |
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{ |
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if((ws2812b_array[CurrentLed].red & (1<<k)) == 0) |
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buffer[j] = zero; |
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else |
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buffer[j] = one; |
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j++; |
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} |
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//BLUE |
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for(int8_t k=7; k>=0; k--) |
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{ |
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if((ws2812b_array[CurrentLed].blue & (1<<k)) == 0) |
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buffer[j] = zero; |
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else |
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buffer[j] = one; |
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j++; |
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} |
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CurrentLed++; |
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} |
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} |
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} |
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} |
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void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi) |
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{ |
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if(hspi == hspi_ws2812b) |
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{ |
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if(CurrentLed > WS2812B_LEDS) |
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{ |
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HAL_SPI_DMAStop(hspi_ws2812b); |
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} |
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else |
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{ |
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// Even LEDs 0,2,0 |
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uint8_t j = 24; |
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//GREEN |
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for(int8_t k=7; k>=0; k--) |
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{ |
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if((ws2812b_array[CurrentLed].green & (1<<k)) == 0) |
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buffer[j] = zero; |
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else |
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buffer[j] = one; |
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j++; |
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} |
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//RED |
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for(int8_t k=7; k>=0; k--) |
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{ |
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if((ws2812b_array[CurrentLed].red & (1<<k)) == 0) |
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buffer[j] = zero; |
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else |
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buffer[j] = one; |
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j++; |
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} |
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//BLUE |
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for(int8_t k=7; k>=0; k--) |
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{ |
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if((ws2812b_array[CurrentLed].blue & (1<<k)) == 0) |
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buffer[j] = zero; |
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else |
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buffer[j] = one; |
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j++; |
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} |
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CurrentLed++; |
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} |
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} |
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} |
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static const uint8_t _sineTable[256] = { |
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128,131,134,137,140,143,146,149,152,155,158,162,165,167,170,173, |
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176,179,182,185,188,190,193,196,198,201,203,206,208,211,213,215, |
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218,220,222,224,226,228,230,232,234,235,237,238,240,241,243,244, |
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245,246,248,249,250,250,251,252,253,253,254,254,254,255,255,255, |
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255,255,255,255,254,254,254,253,253,252,251,250,250,249,248,246, |
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245,244,243,241,240,238,237,235,234,232,230,228,226,224,222,220, |
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218,215,213,211,208,206,203,201,198,196,193,190,188,185,182,179, |
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176,173,170,167,165,162,158,155,152,149,146,143,140,137,134,131, |
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128,124,121,118,115,112,109,106,103,100, 97, 93, 90, 88, 85, 82, |
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79, 76, 73, 70, 67, 65, 62, 59, 57, 54, 52, 49, 47, 44, 42, 40, |
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37, 35, 33, 31, 29, 27, 25, 23, 21, 20, 18, 17, 15, 14, 12, 11, |
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10, 9, 7, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, |
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0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 9, |
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10, 11, 12, 14, 15, 17, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35, |
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37, 40, 42, 44, 47, 49, 52, 54, 57, 59, 62, 65, 67, 70, 73, 76, |
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79, 82, 85, 88, 90, 93, 97,100,103,106,109,112,115,118,121,124}; |
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static const uint8_t _gammaTable[256] = { |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, |
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3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 7, |
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7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, |
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13, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, |
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20, 21, 21, 22, 22, 23, 24, 24, 25, 25, 26, 27, 27, 28, 29, 29, |
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30, 31, 31, 32, 33, 34, 34, 35, 36, 37, 38, 38, 39, 40, 41, 42, |
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42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, |
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58, 59, 60, 61, 62, 63, 64, 65, 66, 68, 69, 70, 71, 72, 73, 75, |
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76, 77, 78, 80, 81, 82, 84, 85, 86, 88, 89, 90, 92, 93, 94, 96, |
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97, 99,100,102,103,105,106,108,109,111,112,114,115,117,119,120, |
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122,124,125,127,129,130,132,134,136,137,139,141,143,145,146,148, |
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150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180, |
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182,184,186,188,191,193,195,197,199,202,204,206,209,211,213,215, |
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218,220,223,225,227,230,232,235,237,240,242,245,247,250,252,255}; |
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uint8_t sine8(uint8_t x) |
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{ |
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return _sineTable[x]; |
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} |
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uint8_t gamma8(uint8_t x) |
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{ |
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return _gammaTable[x]; |
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}
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