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https://github.com/ADElectronics/RTL00_WEB_VS.git
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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
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#ifndef _WS2812_H_
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#define _WS2812_H_
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#include "FreeRTOS.h"
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#include "task.h"
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#include "event_groups.h"
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#include <spi_api.h>
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#include <spi_ex_api.h>
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#include <autoconf.h>
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#include <platform_stdlib.h>
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#include "semphr.h"
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#include "event_groups.h"
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#define WS2812_LEDS_MAX 500
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#define WS2812_RESET_LEN (50 / 2)
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#define WS2812_DMABUF_LEN(x) ((x) * 3 * 4 + WS2812_RESET_LEN)
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#define WS2812_SPI_FREQ 3200000 // и делённое на 4 (4 бита SPI за 1 бит WS8212) = в итоге 800кГц
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#define WS2812_SPI_MOSI PC_2 // SPI0
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#define WS2812_SPI_MISO NC//PC_3
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#define WS2812_SPI_SCLK NC//PC_1
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#define WS2812_SPI_CS NC//PC_0
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// Events to signal completion of DMA transfer
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#define BIT_START (1 << 0)
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#define BIT_DONE (1 << 1)
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// посылается 2 бита протокола WS2812 за один байт SPI, один бит WS2812 за 4 бита SPI.
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#define WS2812_BITS_00 0x88
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#define WS2812_BITS_01 0x8e
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#define WS2812_BITS_10 0xe8
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#define WS2812_BITS_11 0xee
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typedef struct
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{
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uint8_t R;
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uint8_t G;
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uint8_t B;
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} WS2812_RGB_t;
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typedef struct
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{
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uint8_t HUE;
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uint8_t Sat;
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uint8_t Value;
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} WS2812_HSV_t;
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typedef struct
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{
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spi_t spi_master;
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EventGroupHandle_t *events;
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SemaphoreHandle_t *mutex;
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uint8_t *dma_buff;
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size_t buff_len;
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uint16_t strip_len;
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} WS2812_t;
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WS2812_t *WS2812_Init(uint16_t len);
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int32_t WS2812_SetLen(WS2812_t *cfg, uint16_t len);
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int32_t WS2812_DeInit(WS2812_t *cfg);
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int32_t WS2812_Update(WS2812_t *cfg, WS2812_HSV_t hsv[], uint32_t len, uint16_t delay);
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#define max(a,b) ((a) > (b) ? (a) : (b))
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#define scale_up(x) ((x) << 8)
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#define scale_down(x) ((x) >> 8)
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#endif // _WS2812_H_
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