finish中执行list_timer以后timer一直刷屏，求解？

发布于 2013-12-30 01:45:55 浏览：3153 订阅该版

该gprs_timer 是一个定时两秒定时器。按照编程指南进行操作的
以下贴出代码以及截图：中文乱码 请见谅
![power_on.jpg](/uploads/6216_d9c2f14be9a6fea51f4d364700c6d58d.jpg)
```
rt_err_t gprs_send_cmd(const char *_cmd, const char *_ack, rt_uint16_t _wait_time)
{
	struct rx_msg gprs_rx_msg;				
	rt_device_t gprs_device;				//	?????è±?????	
	
	rt_uint8_t gprs_cmd_buf[64];			//	·?????????
	
	rt_uint8_t gprs_rx_buf[64];				//	??????????
	rt_uint16_t rx_length;					//	?????¤??????
	
	rt_uint8_t state = 0;
	rt_uint16_t wait_time = _wait_time*100;
	
	sprintf((char *)gprs_cmd_buf, "%s
f", _cmd);
	
	gprs_timer_flag = 0;
	
	/*	?????¨?±?÷gprs_timer	*/
	rt_timer_init(&gprs_timer, "gprs_timer", gprs_timer_callback, RT_NULL, 200, RT_TIMER_FLAG_ONE_SHOT);
	
	
	/*	?ò?????????????è?????÷????	*/
	gprs_device = rt_device_find("uart2");
	if (gprs_device != RT_NULL)
	{
		rt_device_set_rx_indicate(gprs_device, gprs_rx_indicate);
		rt_device_open(gprs_device, RT_DEVICE_FLAG_RDWR);
	}
	else
	{
		return RT_ERROR;	//	???????????????? ·????í?ó
	}
	
	
	while (1)
	{
		switch (state)
		{
			case 0:
			{
				/*	????????????????  ???ó?????¨?±?÷	*/
				rt_device_write(gprs_device, 
					0 ,gprs_cmd_buf, rt_strlen((const char *)gprs_cmd_buf));
				
				rt_timer_control(&gprs_timer, RT_TIMER_CTRL_SET_TIME, (void*)&wait_time);
				rt_timer_start(&gprs_timer);
				state = 1;
			}
			break;
			
			case 1:
			{
				if ( 1 == gprs_timer_flag)
				{
					rt_timer_stop(&gprs_timer);
					gprs_timer_flag = 0;
					
					if (RT_EOK == rt_mq_recv(&rx_mq, &gprs_rx_msg, sizeof(struct rx_msg), RT_WAITING_NO))	//	??????
					{	
						rx_length = (sizeof(gprs_rx_buf) - 1) > gprs_rx_msg.size ? 
							gprs_rx_msg.size : (sizeof(gprs_rx_buf) - 1);
						
						/*	??????????????????????	*/
						rx_length = rt_device_read(gprs_rx_msg.dev, 0, &gprs_rx_buf[0], rx_length);
						gprs_rx_buf[rx_length] = '�';
						
						if ( RT_NULL != rt_strstr((const char *)gprs_rx_buf, (const char *)_ack))
						{
							return RT_EOK;
						}
						else
						{
							state = 2;
						}
					}
					else
					{
						return RT_ERROR;
					}
				}
				else
				{
					state = 1;
				}
			}
			break;
			
			case 2:
			{
				/*????????×?·?*/
				return RT_ENOSTR;
			}
						
			default: break;
		}
		rt_thread_delay(100);
	}
}
```