超时判断的代码
```c
//超时时间
	dtu_timeout_s.usec = 200000;
	dtu_timeout_s.sec = 0;
if (DTU_flag == 1)
		{
			//关闭平时通信时的定时器
			rt_device_control(hw_dev, HWTIMER_CTRL_STOP, RT_NULL);
			rt_event_send(&feed_dog_event, EVENT_FLAG3);

if (dtu_timeout == 1 && old_dtu_recv_cnt != 0 && cnt2 == 0)
			{
				//透传时，关闭dtu使用的定时器
				rt_device_control(hw_dtu_timer, HWTIMER_CTRL_STOP, RT_NULL);
				dtu_timeout = 0;
				rt_uint16_t len = (rt_uint16_t)rt_strlen(dtu_buf);
				// LOG_I("total bytes1 %d\n  bytes2 %d",len,dtu_recv_cnt);
				//串口6用作控制台的话，就不向外输出了
	#ifndef  UART6_IS_FINSH
				rt_device_write(dtu_dev, 0, dtu_buf, len);
				rt_thread_mdelay(20);
				// LOG_I("\n");
				// for(rt_uint16_t i = 0; i < len; i++)
				// {
				// 	LOG_I("%2x", dtu_buf[i]);
				// }
				// LOG_I("\n");
				// ulog_hex("dtu data", 16, dtu_buf, len);
				// LOG_HEX("dtu data", 16, dtu_buf, len);
	#endif
				dtu_tmp_ptr = dtu_buf;
				rt_memset(dtu_buf, 0, sizeof(dtu_buf));
				dtu_recv_cnt = 0;
				old_dtu_recv_cnt = 0;
			}
			else
			{
				// rt_device_control(hw_dev, HWTIMER_CTRL_STOP, RT_NULL);
				while( cnt2 = rt_device_read(env_dev, -1, dtu_tmp_ptr, 4096) )
				{
					// rt_base_t level;
					//  level = rt_hw_interrupt_disable();
					//重新开启定时器
					rt_device_write(hw_dtu_timer, 0, &dtu_timeout_s, sizeof(dtu_timeout_s)) ;
					
					dtu_recv_cnt += cnt2;
					dtu_tmp_ptr += cnt2;
					old_dtu_recv_cnt = cnt2;
					// LOG_I("recv %d bytes, total %d\n", cnt2,dtu_recv_cnt);
	// #ifndef  UART6_IS_FINSH
	// 				rt_device_write(dtu_dev, 0, dtu_buf, cnt2);
	// #endif			
					// rt_hw_interrupt_enable(level);
				}
			}
			
		}
```

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出出啊 2022-12-06

恃人不如自恃，人之为己者不如己之自为也

伊森亨特 2022-12-06

这家伙很懒，什么也没写！

伊森亨特 2022-12-06

这家伙很懒，什么也没写！

超时判断的方法
```c

dtu_timeout_s.usec = 200000;
	dtu_timeout_s.sec = 0;
if (DTU_flag == 1)
		{
			//关闭平时通信时的定时器
			rt_device_control(hw_dev, HWTIMER_CTRL_STOP, RT_NULL);
			rt_event_send(&feed_dog_event, EVENT_FLAG3);

if (dtu_timeout == 1 && old_dtu_recv_cnt != 0 && cnt2 == 0)
			{
				//透传时，关闭dtu使用的定时器
				rt_device_control(hw_dtu_timer, HWTIMER_CTRL_STOP, RT_NULL);
				dtu_timeout = 0;
				rt_uint16_t len = (rt_uint16_t)rt_strlen(dtu_buf);
				// LOG_I("total bytes1 %d\n  bytes2 %d",len,dtu_recv_cnt);
				//串口6用作控制台的话，就不向外输出了
	#ifndef  UART6_IS_FINSH
				rt_device_write(dtu_dev, 0, dtu_buf, len);
				rt_thread_mdelay(20);
				// LOG_I("\n");
				// for(rt_uint16_t i = 0; i < len; i++)
				// {
				// 	LOG_I("%2x", dtu_buf[i]);
				// }
				// LOG_I("\n");
				// ulog_hex("dtu data", 16, dtu_buf, len);
				// LOG_HEX("dtu data", 16, dtu_buf, len);
	#endif
				dtu_tmp_ptr = dtu_buf;
				rt_memset(dtu_buf, 0, sizeof(dtu_buf));
				dtu_recv_cnt = 0;
				old_dtu_recv_cnt = 0;
			}
			else
			{
				// rt_device_control(hw_dev, HWTIMER_CTRL_STOP, RT_NULL);
				while( cnt2 = rt_device_read(env_dev, -1, dtu_tmp_ptr, 4096) )
				{
					// rt_base_t level;
					//  level = rt_hw_interrupt_disable();
					
					rt_device_write(hw_dtu_timer, 0, &dtu_timeout_s, sizeof(dtu_timeout_s)) ;
					
					dtu_recv_cnt += cnt2;
					dtu_tmp_ptr += cnt2;
					old_dtu_recv_cnt = cnt2;
					// LOG_I("recv %d bytes, total %d\n", cnt2,dtu_recv_cnt);
	// #ifndef  UART6_IS_FINSH
	// 				rt_device_write(dtu_dev, 0, dtu_buf, cnt2);
	// #endif			
					// rt_hw_interrupt_enable(level);
				}
			}
			
		}
		else
		{
			rt_event_send(&feed_dog_event, EVENT_FLAG3);
			while (recv_cnt = rt_device_read(env_dev, -1, tmp_ptr, 4096)  )
			{
				// LOG_I("recv_cnt = %d", recv_cnt);
				
				rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) ;
				cnt += recv_cnt;
				tmp_ptr += recv_cnt;
				old_recv_cnt = recv_cnt;
			}
			
		}
```