UART

请教一个问题，关于finish shell中用的串口中断疑惑

发布于 2018-12-03 21:17:23 浏览：1970 订阅该版

liuduanfei 2018-12-05

这家伙很懒，什么也没写！

2 个回答

liuduanfei 2018-12-03

这家伙很懒，什么也没写！

if (serial->serial_rx == RT_NULL)
    {
        if (oflag & RT_DEVICE_FLAG_INT_RX)
        {
            struct rt_serial_rx_fifo* rx_fifo;

rx_fifo = (struct rt_serial_rx_fifo*) rt_malloc (sizeof(struct rt_serial_rx_fifo) +
                serial->config.bufsz);
            RT_ASSERT(rx_fifo != RT_NULL);
            rx_fifo->buffer = (rt_uint8_t*) (rx_fifo + 1);
            rt_memset(rx_fifo->buffer, 0, serial->config.bufsz);
            rx_fifo->put_index = 0;
            rx_fifo->get_index = 0;
            rx_fifo->is_full = RT_FALSE;

serial->serial_rx = rx_fifo;
            dev->open_flag |= RT_DEVICE_FLAG_INT_RX;
            /* configure low level device */
            serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX);
        }
        else
        {
            serial->serial_rx = RT_NULL;
        }

在调用串口打开函数的时候 直接跳到else这部分了 好像没有执行serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX);

这句不就是配置接收非空中断使能吗？