RT-Thread studio i2c 驱动TCA62724（RGBLED驱动）芯片问题记录

RT-Thread studio i2c 驱动TCA62724（RGBLED驱动）芯片问题记录

配置完i2c后根据芯片手册可成功亮灯，但是每次的写入读出时间要很长（3-5s），后来发现是i2c的延时问题，官方给定的是1us的延时，这里需要根据自己的芯片改动

stm32f427vi delay_us =100,亲测可用
这款芯片网上资料较少，根据手册可以写，下面是驱动代码

struct rt_i2c_msg msg;
rt_uint8_t readbuf[2];
rt_uint8_t yellow_buff[5] = {TCA62724_PWM0_AUTOINC_ON_ADDR,0x0F,0x0F,0x0F,0x03};
rt_uint8_t red_buff[5] = {TCA62724_PWM0_AUTOINC_ON_ADDR,0x00,0x00,0x0F,0x03};
rt_uint8_t green_buff[5] = {TCA62724_PWM0_AUTOINC_ON_ADDR,0x00,0x0F,0x00,0x03};
rt_uint8_t blue_buff[5] = {TCA62724_PWM0_AUTOINC_ON_ADDR,0x0F,0x00,0x00,0x03};
rt_uint8_t shutdown_buff[5] = {TCA62724_PWM0_AUTOINC_ON_ADDR,0x00,0x00,0x00,0x03};
void rgb_send(struct rt_i2c_bus_device *dev,rt_uint8_t *sendbuff,rt_uint16_t len)
{
    msg.addr = TCA62724_SLAVE_WRITE_ADDR>>1;
    msg.flags = RT_I2C_WR;
    msg.buf = sendbuff;
    msg.len=len;
    rt_i2c_transfer(dev, &msg, len);
    rt_thread_mdelay(10);
}
void LED_RGB()
{
    i2c_bus = (struct rt_i2c_bus_device *)rt_device_find(TCA62724_I2C_BUS_NAME);
    if(i2c_bus==RT_NULL)
    {
        rt_kprintf("open i2c device failed! please check it out !\r\n");
    }else {
        rt_kprintf("i2c success!!\r\n");
    }


    while(1)
    {
        rgb_send(i2c_bus,blue_buff,5);
        rt_thread_mdelay(300);

        rgb_send(i2c_bus,shutdown_buff,5);
        rt_thread_mdelay(300);

    }

}