文件系统卡死的问题

发布于 2016-12-19 16:09:04 浏览：3281 订阅该版

系统版本v1.2.2，运行环境STM32F207

发现程序经常卡死在一个地方，经调试发现是在文件系统调用SD卡读时，卡在while(SD_GetStatus() != SD_TRANSFER_OK);这里了
这里的read是受外部传感器触发才会去读对应的文件：
如果在read前关闭中断，就会100%卡死在这里
```        int ret = -1,fd_conf, readlen = 0;
	char *pBuffer = RT_NULL;
	struct stat tmpstat = {0};
	char filename[30] = {0};
	int offset;
	u32 loop_state = SCStReflex;
	st_rf24pkt_t* pTmpPkg = RT_NULL;
	pst_sensor pSensor = RT_NULL;
	rt_base_t level;
	pSensor = getSensorById(pSensorMsg->id);
	if(pSensor == RT_NULL)
		return;
	
	//! waiting for mutex
	rt_mutex_take(&sensor_mutex,RT_WAITING_FOREVER);
	//! update sensor param
	pSensor->param = pSensorMsg->param;
	//! release mutex
	rt_mutex_release(&sensor_mutex);
	
	//! filename
	rt_sprintf(filename,"%s/%d",SENSORDIR,pSensor->id);
	ret = stat(filename,&tmpstat);
	if(ret < 0 || tmpstat.st_size < 26){
		rt_kprintf("control content is empty
");
		return;
	}
	//! allocation
	pBuffer = rt_malloc(tmpstat.st_size + 1);		
	if(pBuffer == RT_NULL){
		rt_kprintf("out of memory for processing control
");
		return;
	}
	rt_memset(pBuffer,0,tmpstat.st_size + 1);
	//! open control content file
	fd_conf = open(filename,O_RDONLY,0);
	if(fd_conf < 0){
		rt_kprintf("control content file open failed
");
		rt_free(pBuffer);
		return;
	}
	/* disable interrupt */
	level = rt_hw_interrupt_disable();
	//! read content
	readlen = read(fd_conf,pBuffer,tmpstat.st_size);
	/* enable interrupt */
	rt_hw_interrupt_enable(level);```

求大神指点指点 
谢谢！