加接收(msh报错)
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@ -403,6 +403,9 @@ void cdc_entry(void *parameter)
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rt_thread_mdelay(500);
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}
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}
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/* 用于接收消息的信号量 */
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static struct rt_semaphore rx_sem;
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/* 接收数据回调函数 */
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static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
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{
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@ -414,19 +417,19 @@ static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
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static void serial_thread_entry(void *parameter)
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{
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char ch;
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char ch[105];
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while (1)
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{
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/* 从串口读取一个字节的数据,没有读取到则等待接收信号量 */
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while (rt_device_read(serial, -1, &ch, 1) != 1)
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int Size;
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while ((Size=rt_device_read(serial, -1, &ch, 104) )!= 1)
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{
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/* 阻塞等待接收信号量,等到信号量后再次读取数据 */
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rt_sem_take(&rx_sem, RT_WAITING_FOREVER);
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}
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/* 读取到的数据通过串口错位输出 */
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ch = ch + 1;
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rt_device_write(serial, 0, &ch, 1);
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rt_kprintf("%s",ch);
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}
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}
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@ -464,9 +467,22 @@ void serial_init(void)
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/* 以 DMA 接收及轮询发送方式打开串口设备 */
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rt_device_open(serial, RT_DEVICE_FLAG_INT_RX);
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/* 设置接收回调函数 */
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rt_device_set_rx_indicate(serial, uart_input);
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char str[] = "hello RTT\r\n";
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/* 发送字符串 */
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rt_device_write(serial, 0, str, (sizeof(str) - 1));
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/* 创建 serial 线程 */
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rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10);
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/* 创建成功则启动线程 */
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if (thread != RT_NULL)
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{
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rt_thread_startup(thread);
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}
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else
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{
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rt_kprintf("serial Thread Create Failed!\n");
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}
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}
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void mqt_init(void)
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{
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