Function serial_thread_entry_dma

bsp/hc32/tests/test_uart_v2.c:134–168

}

static void serial_thread_entry_dma(void *parameter)
{
    struct rx_msg msg;
    rt_err_t result;
    rt_uint32_t rx_length;
    static char rx_buffer[256];
    static rt_uint32_t buf_size = sizeof(rx_buffer);
    static rt_uint32_t put_index = 0;

    while (1)
    {
        rt_memset(&msg, 0, sizeof(msg));
        /* 从消息队列中读取消息 */
        result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
        if (result > 0UL)
        {
            while (msg.size)
            {
                if (msg.size > (buf_size - put_index))
                {
                    rx_length = rt_device_read(msg.dev, 0, rx_buffer + put_index, buf_size - put_index);
                    msg.size -= rx_length;
                }
                else
                {
                    rx_length = rt_device_read(msg.dev, 0, rx_buffer + put_index, msg.size);
                    msg.size = 0UL;
                }
                rt_device_write(serial, 0, rx_buffer + put_index, rx_length);
                put_index += rx_length;
                put_index %= sizeof(rx_buffer);
            }
        }
    }
}

static void serial_thread_entry_int(void *parameter)
{