中断串口

为什么开启串口时使用RT_DEVICE_FLAG_INT_RX，串口只能触发一次中断？

发布于 2023-04-06 16:06:20 浏览：829 订阅该版

3 个回答

伊森亨特 2023-04-06

这家伙很懒，什么也没写！

张世争 2023-04-06

学以致用

伊森亨特 2023-04-06

这家伙很懒，什么也没写！

伊森亨特 2023-04-06

这家伙很懒，什么也没写！

伊森亨特 2023-04-07

这家伙很懒，什么也没写！

伊森亨特 2023-04-07

这家伙很懒，什么也没写！

中断回调函数

```c
static rt_err_t Screen_rx_ind(rt_device_t dev, rt_size_t size)
{
    /* release semaphore to let finsh thread rx data */
	rt_kprintf("XXXXXXXX %d %02x\n",size, ScreenDev.r_tx.value);
    rt_sem_release(&ScreenDev.r_tx);
	rt_kprintf("XXXXXXXX %d %02x\n",size, ScreenDev.r_tx.value);
    return RT_EOK;
}
```

初始化函数

```c
if(RT_EOK ==rt_device_open(ScreenDev.dev, RT_DEVICE_FLAG_INT_RX))
        {
            rt_kprintf("Screen serial open success.\r\n");
            //return RT_EOK;
        }
        else
        {
            rt_kprintf("Screen serial open failure.\r\n");
            return RT_ERROR;
        }
        pconfig.baud_rate = BAUD_RATE_115200;
        pconfig.data_bits = DATA_BITS_8;
        pconfig.stop_bits = STOP_BITS_1;
        pconfig.parity    = PARITY_NONE;
        pconfig.bit_order = BIT_ORDER_LSB;
        pconfig.invert    = NRZ_NORMAL;
        pconfig.bufsz     = 256;
        pconfig.reserved  = 0;
        /* 设置串口参数 */
        rt_device_control(ScreenDev.dev, RT_DEVICE_CTRL_CONFIG, &pconfig);
        /*设置串口的回调函数 */
        rt_device_set_rx_indicate(ScreenDev.dev, Screen_rx_ind);
```