1st

Firmware/RTLGDB/Project/WS2812/ledeffectsserver.c

@@ -0,0 +1,134 @@
+#include "ledeffectsserver.h"
+#include "ws2812.h"
+#include <flash_api.h>
+
+volatile uint32_t cfg_updated = 0;
+ws2812_t *ws2812_cfg = NULL;
+strip_handler_t strip; 
+SemaphoreHandle_t cfg_sema = NULL;
+
+ctx_rainbow_t filt_rainbow;
+ctx_fade_t filt_fade;
+
+
+
+void ledEffectsServer_Init()
+{
+	cfg_sema = xSemaphoreCreateMutex();
+
+	ws2812_cfg = ws2812_Init(WS2812_LEDS_MAX);
+	if (ws2812_cfg == NULL)
+	{
+		printf("[%s] ws2812_Init() failed\n", __func__);
+		goto error;
+	}
+
+	ledFilter_Init(&strip, ws2812_cfg);
+
+	ledFilter_InitRainbow(&filt_rainbow);
+	ledFilter_InitFade(&filt_fade);
+
+	ledFilter_SetDefualtValue(&strip, MAX_STRIP_BRIGHT);
+	filt_fade.enabled = 1;
+
+	while (1)
+	{
+		if(xSemaphoreTake(cfg_sema, 5 * configTICK_RATE_HZ))
+		{
+			ledFilter_Rainbow(&filt_rainbow, &strip);
+			ledFilter_Fade(&filt_fade, &strip);
+
+			ws2812_Update(ws2812_cfg, strip.hsv_vals, strip.strip_len, strip.delay);
+
+			xSemaphoreGive(cfg_sema);
+		}
+		WDGRefresh();
+	}
+
+error:
+	while (1)
+	{
+		vTaskDelay(1000);
+	}
+}
+
+
+/*
+
+void ledEffectsServer_LoadConfigFromFlash()
+{
+	flash_t flash;
+
+	printf("[%s] reading config from flash\n", __func__);
+	device_mutex_lock(RT_DEV_LOCK_FLASH);
+	flash_stream_read(&flash, LED_SETTINGS_SECTOR, sizeof(strip_cfg), (uint8_t *)&strip_cfg);
+	device_mutex_unlock(RT_DEV_LOCK_FLASH);
+}
+
+void ledEffectsServer_SaveConfigToFlash()
+{
+	flash_t flash;
+
+	printf("[%s] saving config to flash\n", __func__);
+
+	cfg_updated = 0;
+
+	device_mutex_lock(RT_DEV_LOCK_FLASH);
+	flash_erase_sector(&flash, LED_SETTINGS_SECTOR);
+	flash_stream_write(&flash, LED_SETTINGS_SECTOR, sizeof(strip_cfg), (uint8_t *)&strip_cfg);
+	device_mutex_unlock(RT_DEV_LOCK_FLASH);
+}
+*/
+/*
+struct blinken_cfg *blinken_get_config(void)
+{
+blinken_cfg_t *cfg = NULL;
+
+if(strip_cfg.magic == BLINKEN_CFG_MAGIC)
+{
+cfg = malloc(sizeof(*cfg));
+if(cfg != NULL)
+{
+memmove(cfg, &strip_cfg, sizeof(*cfg));
+}
+}
+
+return cfg;
+}
+
+
+int blinken_set_config(blinken_cfg_t *cfg)
+{
+int result;
+BaseType_t status;
+
+result = 0;
+if(cfg == NULL || cfg->magic != BLINKEN_CFG_MAGIC)
+{
+result = -1;
+goto error;
+}
+
+status = xSemaphoreTake(cfg_sema, 15 * configTICK_RATE_HZ);
+if(status != pdTRUE)
+{
+printf("[%s] Timeout waiting for config sema.\n", __func__);
+result = -1;
+goto error;
+}
+
+result = init_handler(&handler, cfg, ws2812_cfg, true);
+if(result == 0)
+{
+memmove(&strip_cfg, cfg, sizeof(strip_cfg));
+save_config();
+}
+
+xSemaphoreGive(cfg_sema);
+
+error:
+return result;
+}
+*/
+
+

Firmware/RTLGDB/Project/WS2812/ledeffectsserver.h

@@ -0,0 +1,18 @@
+#ifndef _LEDEFFECTSSERVER_H_
+#define _LEDEFFECTSSERVER_H_
+
+#include "ledfilters.h"
+
+
+// Ïóáëè÷íûå êîíôèíãè ôèëüòðîâ
+
+
+extern ctx_rainbow_t filt_rainbow;
+extern ctx_fade_t filt_fade;
+
+
+void ledEffectsServer_Init();
+
+
+#endif // _LEDEFFECTSSERVER_H_
+

Firmware/RTLGDB/Project/WS2812/ledfilters.c

@@ -0,0 +1,209 @@
+#include "ledfilters.h"
+
+extern uint32_t cfg_updated;
+
+#pragma region Áàçîâûå ôóíêöèè ïî ðàáîòå ñ ôèëüòðàìè
+int32_t ledFilter_Init(strip_handler_t *strip, ws2812_t *ws2812)
+{
+    if(strip->check != LEDFILTERS_CFG_CHECKWORD)
+	{
+        memset(strip, 0xff, sizeof(strip_handler_t));
+        strip->check = LEDFILTERS_CFG_CHECKWORD;
+        strip->strip_len = DEF_STRIP_LEN;
+        strip->delay = 10;
+        strip->brightness = MAX_STRIP_BRIGHT;
+
+        cfg_updated = 1;
+    }
+
+    if(strip->strip_len > MAX_STRIP_LEN)
+	{
+        strip->strip_len = MAX_STRIP_LEN;
+        cfg_updated = 1;
+    }
+
+    if(strip->delay > MAX_STRIP_DELAY)
+	{
+        strip->delay = MAX_STRIP_DELAY;
+        cfg_updated = 1;
+    }
+
+    if(strip->brightness > MAX_STRIP_BRIGHT)
+	{
+        strip->brightness = MAX_STRIP_BRIGHT;
+        cfg_updated = 1;
+    }
+
+    strip->hsv_vals = malloc(sizeof(ws2812_hsv_t) * strip->strip_len);
+	if (strip->hsv_vals == NULL)
+	{
+		printf("[%s] malloc() failed\n", __func__);
+		return -1;
+	}
+
+	memset(strip->hsv_vals, 0x0, sizeof(ws2812_hsv_t) * strip->strip_len);
+
+	ws2812_SetLen(ws2812, strip->strip_len);
+	
+	return 1;
+}
+
+void ledFilter_SetDefualtValue(strip_handler_t *strip, uint8_t val)
+{
+	uint32_t i;
+	for (i = 0; i < strip->strip_len; i++)
+	{
+		strip->hsv_vals[i].value = val;
+	}
+}
+#pragma endregion
+
+#pragma region Rainbow
+void ledFilter_InitRainbow(ctx_rainbow_t *ctx)
+{
+	if (ctx->valid != LEDFILTERS_CFG_CHECKWORD)
+	{
+		ctx->valid = LEDFILTERS_CFG_CHECKWORD;
+		ctx->hue_steps = WS2812_LEDS_MAX / 2; // Âî ñêîëüêî ñâåòîäèîäîâ âìåñòèòü âñþ ðàäóãó
+		ctx->cycle_steps = 1;
+		ctx->enabled = 1;
+		cfg_updated = 1;
+	}
+
+	ctx->curr_hue = 0;
+}
+
+void ledFilter_Rainbow(ctx_rainbow_t *ctx, strip_handler_t *strip)
+{
+	uint32_t i, j;
+	ws2812_hsv_t tmp_hsv;
+	uint8_t tmp_hue;
+
+	if (ctx->enabled == 0) return;
+
+	tmp_hue = ctx->curr_hue;
+	tmp_hsv.sat = 255;
+
+	for (i = 0, j = ctx->hue_steps; i < strip->strip_len; i++)
+	{
+		if (i == j)
+		{
+			j += ctx->hue_steps;
+			tmp_hue = ctx->curr_hue;
+		}
+
+		tmp_hsv.hue = tmp_hue;
+		tmp_hsv.value = strip->hsv_vals[i].value;
+		strip->hsv_vals[i] = tmp_hsv;
+		tmp_hue += 255/ ctx->hue_steps;
+		tmp_hue %= 256;
+	}
+
+	ctx->curr_hue += ctx->cycle_steps;
+	ctx->curr_hue %= 256;
+}
+#pragma endregion
+
+#pragma region Fade
+void ledFilter_InitFade(ctx_fade_t *ctx)
+{
+	if (ctx->valid != LEDFILTERS_CFG_CHECKWORD)
+	{
+		ctx->valid = 1;
+		ctx->min = 0;
+		ctx->max = 255;
+		ctx->steps = LEDFILTERS_MAX_STEPS;
+		ctx->enabled = 1;
+		cfg_updated = 1;
+	}
+
+	if (ctx->steps == 0)
+	{
+		ctx->enabled = 0;
+	}
+
+	ctx->curr_val = 0;
+	ctx->curr_step = 0;
+}
+
+void ledFilter_Fade(ctx_fade_t *ctx, strip_handler_t *strip)
+{
+	uint32_t i;
+
+	if (ctx->enabled == 0) return;
+
+	if (ctx->curr_val == 0)
+	{
+		for (i = 0; i < strip->strip_len; i++)
+		{
+			if (strip->hsv_vals[i].value > ctx->min)
+			{
+				if (strip->hsv_vals[i].value > (255 / ctx->steps))
+					strip->hsv_vals[i].value -= (255 / ctx->steps);
+				else
+				{
+					strip->hsv_vals[i].value = 0;
+					ctx->curr_step = ctx->steps;
+				}
+			}
+			else
+			{
+				ctx->curr_step = ctx->steps;
+			}			
+		}
+	}
+	else
+	{
+		for (i = 0; i < strip->strip_len; i++)
+		{
+			if (strip->hsv_vals[i].value <= ctx->max)
+			{
+				if (strip->hsv_vals[i].value + (255 / ctx->steps) > ctx->max)
+				{
+					strip->hsv_vals[i].value = ctx->max;
+					ctx->curr_step = ctx->steps;
+				}					
+				else
+					strip->hsv_vals[i].value += (255 / ctx->steps);
+			}
+			else
+			{
+				ctx->curr_step = ctx->steps;
+			}
+		}
+	}
+	ctx->curr_step++;
+
+	if (ctx->curr_step >= ctx->steps)
+	{
+		if (ctx->curr_val) ctx->curr_val = 0;
+		else ctx->curr_val = 1;
+		ctx->curr_step = 0;
+	}
+}
+#pragma endregion
+
+#pragma region Wave
+void ledFilter_InitWave(ctx_wave_t *ctx)
+{
+
+}
+
+void ledFilter_Wave(ctx_wave_t *ctx, strip_handler_t *strip)
+{
+
+}
+#pragma endregion
+
+#pragma region Constant
+void ledFilter_InitConstant(ctx_const_t *ctx)
+{
+
+}
+
+void ledFilter_Constant(ctx_const_t *ctx, strip_handler_t *strip)
+{
+
+}
+#pragma endregion
+

Firmware/RTLGDB/Project/WS2812/ledfilters.h

@@ -0,0 +1,82 @@
+#ifndef _LEDFILTERS_H_
+#define _LEDFILTERS_H_
+
+#include <math.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "macro_common.h"
+#include <autoconf.h>
+#include <platform_opts.h>
+#include <platform_stdlib.h>
+#include "device_lock.h"
+#include "ws2812.h"
+
+#define LEDFILTERS_CFG_CHECKWORD	0x4C414D50 // "LAMP"
+#define LEDFILTERS_MAX_STEPS		250 // 255 MAX !
+
+#define DEF_STRIP_LEN				WS2812_LEDS_MAX
+#define MAX_STRIP_LEN				WS2812_LEDS_MAX
+#define MAX_STRIP_BRIGHT			255
+#define MAX_STRIP_DELAY				500
+
+#pragma region Rainbow
+typedef struct
+{
+	uint8_t enabled;
+	uint32_t valid;
+	uint32_t hue_steps; // кол.во светодиодов, в которое вместить радугу
+	uint8_t cycle_steps; // типа скорости
+	uint8_t curr_hue;
+} ctx_rainbow_t;
+#pragma endregion
+
+#pragma region Fade
+typedef struct
+{
+	uint8_t enabled;
+	uint32_t valid;
+	uint32_t steps;
+	uint32_t min;
+	uint32_t max;
+	uint32_t curr_val;
+	int32_t curr_step;
+} ctx_fade_t;
+#pragma endregion
+
+#pragma region Wave
+typedef struct
+{
+	uint8_t enabled;
+	uint32_t valid;
+} ctx_wave_t;
+#pragma endregion
+
+#pragma region Constant
+typedef struct
+{
+	uint8_t enabled;
+	uint32_t valid;
+} ctx_const_t;
+#pragma endregion
+
+typedef struct
+{
+	uint32_t check;
+	ws2812_hsv_t *hsv_vals;
+	uint32_t strip_len;
+	uint32_t brightness;
+	uint32_t delay;
+} strip_handler_t;
+
+int32_t ledFilter_Init(strip_handler_t *strip, ws2812_t *ws2812);
+
+void ledFilter_InitRainbow(ctx_rainbow_t *ctx);
+void ledFilter_Rainbow(ctx_rainbow_t *ctx, strip_handler_t *strip);
+void ledFilter_InitFade(ctx_fade_t *ctx);
+void ledFilter_Fade(ctx_fade_t *ctx, strip_handler_t *strip);
+void ledFilter_InitWave(ctx_wave_t *ctx);
+void ledFilter_Wave(ctx_wave_t *ctx, strip_handler_t *strip);
+
+void ledFilter_SetDefualtValue(strip_handler_t *strip, uint8_t val);
+
+#endif // _LEDFILTERS_H_

Firmware/RTLGDB/Project/WS2812/ws2812.c

@@ -0,0 +1,329 @@
+#include "ws2812.h"
+
+/* Quick and dirty, we use one big DMA buffer for the whole strip length.
+ * TODO: use smaller DMA buffer and fill in bit patterns on the fly */
+uint8_t dma_buffer[WS2812_DMABUF_LEN(WS2812_LEDS_MAX)];
+
+/* scale uint8 value from range 2-255 to range 0-scale */
+static inline uint8_t WS2812_Scale(uint8_t value, uint8_t scale)
+{
+	uint32_t tmp;
+
+	tmp = value * scale;
+	tmp /= 256;
+
+	return (uint8_t)tmp;
+}
+
+// wake up waiting tasks when DMA transfer is complete 
+static void master_tr_done_callback(void *pdata, SpiIrq event)
+{
+	BaseType_t task_woken, result;
+	ws2812_t *cfg;
+
+	task_woken = pdFALSE;
+	cfg = (ws2812_t *) pdata;
+
+	switch (event) 
+	{
+		case SpiRxIrq:
+			break;
+			
+		case SpiTxIrq:
+			result = xEventGroupSetBitsFromISR(cfg->events, BIT_DONE, &task_woken);
+			if(result == pdPASS)
+			{
+				portYIELD_FROM_ISR(task_woken);
+			}
+			break;
+			
+		default:
+			DBG_8195A("WS2812: Unknown SPI irq event!\n");
+	}
+}
+
+static void WS2812_HSV2RGB(ws2812_hsv_t *hsv, ws2812_rgb_t *rgb)
+{
+	//uint8_t r, g, b;
+	uint8_t hue, sat, val;
+	uint8_t base, sector, offset;
+	uint8_t rise, fall;
+
+	// scale hue to range 0- 3*64. Makes subsequent calculations easier
+	hue = WS2812_Scale(hsv->hue, 192);
+	sat = hsv->sat;
+	val = hsv->value;
+
+	sector = hue / 64;
+	offset = hue % 64;
+
+	// get common white base level and remaining colour amplitude
+	base = 255 - sat;
+
+	rise = (offset * sat * 4) / 256;
+	fall = 255 - base - rise;
+
+	rise = (rise * val) / 256;
+	fall = (fall * val) / 256;
+	base = (base * val) / 256;
+
+	rgb->r = base;
+	rgb->g = base;
+	rgb->b = base;
+
+	switch (sector)
+	{
+	case 0:
+		rgb->r += fall;
+		rgb->g += rise;
+		break;
+	case 1:
+		rgb->g += fall;
+		rgb->b += rise;
+		break;
+	case 2:
+		rgb->r += rise;
+		rgb->b += fall;
+		break;
+	}
+}
+
+// convert a RGB byte into SPI data stream with 2 bits per byte
+static uint8_t *WS2812_RGB2PWM(uint8_t *dst, const uint8_t colour)
+{
+	uint8_t cnt, data = colour;
+
+	for (cnt = 0; cnt < 4; cnt++)
+	{
+		switch (data & 0xC0)
+		{
+		case 0x00:
+			*dst = WS2812_BITS_00;
+			break;
+		case 0x40:
+			*dst = WS2812_BITS_01;
+			break;
+		case 0x80:
+			*dst = WS2812_BITS_10;
+			break;
+		case 0xC0:
+			*dst = WS2812_BITS_11;
+			break;
+		}
+		dst++;
+		data <<= 2;
+	}
+	return dst;
+}
+
+int32_t WS2812_Tx(ws2812_t *cfg, uint16_t delay)
+{
+    EventBits_t rcvd_events;
+    TickType_t timeout;
+    BaseType_t status;
+
+    // wait for any SPI transfer to finish
+    while(cfg->spi_master.state & SPI_STATE_TX_BUSY)
+	{
+        vTaskDelay(0);
+    }
+
+    // obey requested delay
+    if(delay > 0)
+	{
+        vTaskDelay(delay);
+    }
+
+    // lock the DMA buffer mutex while it is transferred
+    status = xSemaphoreTake(cfg->mutex, configTICK_RATE_HZ);
+    if(status != pdTRUE)
+	{
+        printf("WS2812: [%s] Timeout waiting for config mutex.\n", __func__);
+		xSemaphoreGive(cfg->mutex);
+		return -1;
+    }
+    
+    if(cfg->dma_buff == NULL || cfg->buff_len == 0)
+	{
+        printf("WS2812: [%s] DMA buffer invalid\n", __func__);
+		xSemaphoreGive(cfg->mutex);
+		return -1;
+    }
+
+    xEventGroupClearBits(cfg->events, BIT_DONE);
+    spi_master_write_stream_dma(&cfg->spi_master, (char *)(cfg->dma_buff), cfg->buff_len);
+
+    timeout = 1000 / portTICK_PERIOD_MS;
+    rcvd_events = xEventGroupWaitBits(
+                        cfg->events, 
+                        BIT_DONE,        // wait for DMA TX done
+                        pdTRUE,          // clear event bit
+                        pdFALSE,         // do not wait for all bits to be set
+                        timeout );
+
+    if(!(rcvd_events & BIT_DONE))
+	{
+        printf("WS2812: [%s] DMA timeout\n", __func__);
+		xSemaphoreGive(cfg->mutex);
+		return -1;
+    }
+
+    xSemaphoreGive(cfg->mutex);
+    return 1;
+}
+
+int32_t ws2812_Update(ws2812_t *cfg, ws2812_hsv_t hsv_values[], uint32_t strip_len, uint16_t delay)
+{
+    uint32_t i;
+    uint8_t *bufp;
+    uint16_t len;
+    BaseType_t status;
+	ws2812_rgb_t rgb;
+
+    // Æäåì, ïîêà îñâîáîäèòñÿ áóôôåð DMA
+    while(cfg->spi_master.state & SPI_STATE_TX_BUSY)
+	{
+        vTaskDelay(0);
+    }
+
+    status = xSemaphoreTake(cfg->mutex, configTICK_RATE_HZ);
+    if(status != pdTRUE)
+	{
+        printf("WS2812: [%s] Timeout waiting for config mutex.\n", __func__);
+		return -1;
+    }
+    bufp = &(cfg->dma_buff[0]);
+    
+    // Ïðîâåðêà íà âìåùàåìîñòü è êîïèðîâàíèå
+    len = min(strip_len, cfg->strip_len);
+    for(i = 0; i < len; i++)
+	{
+        WS2812_HSV2RGB(&hsv_values[i], &rgb);
+        bufp = WS2812_RGB2PWM(bufp, rgb.g);
+        bufp = WS2812_RGB2PWM(bufp, rgb.r);
+        bufp = WS2812_RGB2PWM(bufp, rgb.b);
+    }
+    
+    // Âñå íå èñïîëüçóåìûå ïèêñåëè - âûêëþ÷àåì
+    if(cfg->strip_len > len)
+	{
+        memset(bufp, WS2812_BITS_00, cfg->strip_len - len);
+        bufp += cfg->strip_len - len;
+    }
+
+    memset(bufp, 0x0, WS2812_RESET_LEN); 
+    xSemaphoreGive(cfg->mutex);
+
+	return WS2812_Tx(cfg, delay);
+}
+
+ws2812_t *ws2812_Init(uint16_t strip_len)
+{
+    int32_t result;
+    ws2812_t *cfg;
+
+    result = 0;
+
+    cfg = malloc(sizeof(ws2812_t));
+    if(cfg == NULL)
+	{
+        printf("WS2812: [%s] malloc for cfg failed\n", __func__);
+        result = -1;
+        goto err_out;
+    }
+
+    memset(cfg, 0x0, sizeof(ws2812_t));
+
+    cfg->mutex = xSemaphoreCreateMutex();
+    if(cfg->mutex == NULL)
+	{
+        printf("WS2812: [%s] Mutex creation failed\n", __func__);
+        result = -1;
+        goto err_out;
+    }
+    
+    cfg->events = xEventGroupCreate();
+    if(cfg->events == NULL)
+	{
+        printf("WS2812: [%s] Creating event group failed\n", __func__);
+        result = -1;
+        goto err_out;
+    }
+
+    spi_init(&(cfg->spi_master), WS2812_SPI_MOSI, WS2812_SPI_MISO, WS2812_SPI_SCLK, WS2812_SPI_CS);
+    spi_format(&(cfg->spi_master), 8, 3, 0);
+    spi_frequency(&(cfg->spi_master), WS2812_SPI_FREQ);
+    spi_irq_hook(&(cfg->spi_master), (spi_irq_handler)master_tr_done_callback, (uint32_t)cfg);
+
+    result = ws2812_SetLen(cfg, strip_len);
+    if(!result)
+	{
+        printf("WS2812: [%s] ws2812_set_len() failed\n", __func__);
+    }
+
+err_out:
+    if(!result && cfg != NULL)
+	{
+        if(cfg->mutex != NULL)
+		{
+            vQueueDelete(cfg->mutex);
+        }
+
+        if(cfg->events != NULL)
+		{
+            vEventGroupDelete(cfg->events);
+        }
+
+        if(cfg->dma_buff != NULL)
+		{
+            free(cfg->dma_buff);
+        }
+
+        free(cfg);
+        cfg = NULL;
+    }
+    
+    return cfg;
+}
+
+int32_t ws2812_SetLen(ws2812_t *cfg, uint16_t strip_len)
+{
+    BaseType_t status;
+    uint32_t reset_off;
+
+    if(cfg == NULL)
+	{
+        printf("WS2812: [%s] no config given\n", __func__);
+		return -1;
+    }
+
+    // lock the config mutex
+    status = xSemaphoreTake(cfg->mutex, configTICK_RATE_HZ);
+    if(status != pdTRUE)
+	{
+        printf("WS2812: [%s] Timeout waiting for config mutex.\n", __func__);
+		return -1;
+    }
+
+    if(strip_len <= WS2812_LEDS_MAX)
+	{
+        /* TODO: use dynamically allocated buffer */
+        cfg->dma_buff = dma_buffer;
+
+        /* initialise LEDs to off and add reset pulse at end of strip */
+        reset_off = WS2812_DMABUF_LEN(strip_len) - WS2812_RESET_LEN;
+        memset(&(cfg->dma_buff[0]), WS2812_BITS_00, reset_off);
+        memset(&(cfg->dma_buff[reset_off]), 0x0, WS2812_RESET_LEN);
+        cfg->strip_len = strip_len;
+        cfg->buff_len = WS2812_DMABUF_LEN(strip_len);
+    } 
+	else 
+	{
+        printf("WS2812: [%s] Strip too long for DMA buffer\n", __func__);
+		return -1;
+    }
+
+    xSemaphoreGive(cfg->mutex);
+    return 1;
+}
+

Firmware/RTLGDB/Project/WS2812/ws2812.h

@@ -0,0 +1,64 @@
+#ifndef _WS2812_H_
+#define _WS2812_H_
+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "event_groups.h"
+#include <spi_api.h>
+#include <spi_ex_api.h>
+#include <autoconf.h>
+#include <platform_stdlib.h>
+#include "semphr.h"
+#include "event_groups.h"
+#include "macro_common.h"
+
+#define WS2812_LEDS_MAX         228
+#define WS2812_RESET_LEN        (50 / 2)
+#define WS2812_DMABUF_LEN(x)    ((x) * 3 * 4 + WS2812_RESET_LEN)
+
+#define WS2812_SPI_FREQ			3400000 // и делённое на 4 (4 бита SPI за 1 бит WS8212) ~~ в итоге 800кГц
+#define WS2812_SPI_MOSI			PC_2 // SPI0
+#define WS2812_SPI_MISO			PC_3
+#define WS2812_SPI_SCLK			PC_1
+#define WS2812_SPI_CS			PC_0
+
+// Events to signal completion of DMA transfer
+#define BIT_START				(1 << 0)
+#define BIT_DONE				(1 << 1)
+
+// посылается 2 бита протокола WS2812 за один байт SPI, один бит WS2812 за 4 бита SPI.
+#define WS2812_BITS_00			0x88
+#define WS2812_BITS_01          0x8e
+#define WS2812_BITS_10          0xe8
+#define WS2812_BITS_11          0xee
+
+typedef struct 
+{
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} ws2812_rgb_t;
+
+typedef struct 
+{
+    uint8_t hue;
+    uint8_t sat;
+    uint8_t value;
+} ws2812_hsv_t;
+
+typedef struct 
+{
+	spi_t spi_master;
+	EventGroupHandle_t *events;
+	SemaphoreHandle_t *mutex;
+	uint8_t *dma_buff;
+	size_t buff_len;
+	uint16_t strip_len;
+} ws2812_t;
+
+ws2812_t *ws2812_Init(uint16_t len);
+int32_t ws2812_SetLen(ws2812_t *cfg, uint16_t len);
+//int32_t WS2812_DeInit(WS2812_t *cfg);
+int32_t ws2812_Update(ws2812_t *cfg, ws2812_hsv_t hsv[], uint32_t len, uint16_t delay);
+
+#endif // _WS2812_H_