/*
 * ws2812b.h
 *
 *  Created on: Jan 6, 2023
 *      Author: weihh
 */

#ifndef INC_WS2812B_H_
#define INC_WS2812B_H_

#include "stm32l4xx_hal.h"

#define WS2812_NUM	3

#define PIXEL_OFF     0          /* off   */
#define PIXEL_B       (0xFF<<0)  /* blue  */
#define PIXEL_R       (0xFF<<8)  /* red   */
#define PIXEL_G       (0xFF<<16) /* green */
#define PIXEL_W       (0xFFFFFF) /* white */

/* Composition of 24 bits data: GRB888
 * +----+----+----+----+----+----+----+----+----+
 * | G7 | ...| G0 | R7 | ...| R0 | B7 | ...| B0 |
 * +----+----+----+----+----+----+----+----+----+
 */
typedef struct pixel_s
{
	uint32_t    blue:8;
	uint32_t    red:8;
	uint32_t    green:8;
} pixel_t;

typedef union color_u
{
	pixel_t    pixel;
	uint32_t   data;
} color_t;


extern void ws2812b_init(void);

extern void ws2812b_reset(void);

extern int ws2812b_turn(int which, color_t color);

extern void ws2812b_blink(void);

#endif /* INC_WS2812B_H_ */