关于节点问题：当颜色值（大于0的值）小于10时，第一个节点的颜色会出现异常，其后的其它节点颜色正常修改ws2812_write_buff()实现

//  写颜色节点颜色到缓冲区  //  2byte == 1bit
void ws2812_write_buff(uint8_t *buff, uint8_t r, uint8_t g, uint8_t b)
{
    uint32_t c = (uint32_t)((uint32_t)(g << 16) | (uint32_t)(r << 8) | b) ;
    const uint16_t one_code = 0xFFF8U;
    const uint16_t zero_code = 0xE000U;
    uint32_t point;
    uint8_t i, j;
    memset(buff, 0, sizeof(uint8_t) * 30);
    point = 0;
    for (i = 0; i < 24; i++)                                         /* set 24 bit */
    {
        if (((c >> (23 - i)) & 0x01) != 0)                           /* if bit 1 */
        {
            for (j = 0; j < 16; j ++)                                /* 16 bit */
            {
                if (((one_code >> (15 - j)) & 0x01) != 0)            /* if one code */
                {
                    buff[point / 8] |= 1 << (7 - (point % 8));       /* set bit 1 */
                }
                else
                {
                    buff[point / 8] |= 0 << (7 - (point % 8));       /* set bit 0 */
                }
                point = point + 1;                                   /* point++ */
            }
        }
        else                                                         /* if bit 0 */
        {
            for (j = 0; j < 16; j ++)                                /* 16 bit */
            {
                if (((zero_code >> (15 - j)) & 0x01) != 0)           /* if zero code */
                {
                    buff[point / 8] |= 1 << (7 - (point % 8));       /* set bit 1 */
                }
                else
                {
                    buff[point / 8] |= 0 << (7 - (point % 8));       /* set bit 0 */
                }
                point = point + 1;                                   /* point++ */
            }
        }
    }
}

RT-Thread-Mirror/rt_ws2812b

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