Function rt_led_set_state

components/drivers/led/led.c:221–270

}

rt_err_t rt_led_set_state(struct rt_led_device *led, enum rt_led_state state)
{
    rt_err_t err;
    struct blink_timer *btimer;

    if (!led)
    {
        return -RT_EINVAL;
    }

    if (!led->ops->set_state)
    {
        return -RT_ENOSYS;
    }

    rt_spin_lock(&led->spinlock);

    btimer = led->sysdata;

    if (btimer && btimer->enabled)
    {
        rt_timer_stop(&btimer->timer);
    }

    err = led->ops->set_state(led, state);

    if (state == RT_LED_S_BLINK)
    {
        if (err == -RT_ENOSYS && btimer && !btimer->enabled)
        {
            btimer->enabled = RT_TRUE;
            rt_timer_start(&btimer->timer);
        }
    }
    else if (btimer && btimer->enabled)
    {
        if (err)
        {
            rt_timer_start(&btimer->timer);
        }
        else
        {
            btimer->enabled = RT_FALSE;
        }
    }

    rt_spin_unlock(&led->spinlock);

    return err;
}

rt_err_t rt_led_get_state(struct rt_led_device *led, enum rt_led_state *out_state)
{