W25Q32BV多次写文件导致数据错乱！

发布于 2018-08-02 10:11:24 浏览：3113 订阅该版

* 本帖最后由 395829833 于 2018-8-2 11:05 编辑 *

* 芯片和板子型号：STM32F103VCT6

* RT-Thread 版本：3.0.3

* BSP 及编译工具：keil

* 问题简单描述   ： W25Q32BV 开DFS文件系统 多次写文件会导致文件系统数据错乱 （SPI+DMA中断方式）

把W25Q32BV作为主文件系统 ，再挂载SD卡文件系统到W25Q32BV文件系统的SD文件夹上面出现此情况，目前SD卡是不插。、 以下是挂载方法：
```void filesystem_entry(void * parameter)
{
	rt_bool_t res = RT_FALSE;
	
 /* mount SPI flash as root directory */ 
	if (dfs_mount("flash0", "/", "elm", 0, 0) == 0)
	{
		 res = RT_TRUE;
			rt_kprintf("flash0 filesystem start ok.(/.) ");
	}
	else if(dfs_mkfs("elm","flash0") == 0)
	{
			if (dfs_mount("flash0", "/", "elm", 0, 0) == 0)
			{
				res = RT_TRUE;
				rt_kprintf("flash0 filesystem mkfs ok.(/.) ");
			}
			else
			{
				rt_kprintf("flash0 filesystem mkfs no!(/.) ");
			}
	}	
	else
	{
		rt_kprintf("flash0 filesystem start no!(/.) ");
	}
	
	if(res == RT_TRUE)
	{
		DIR *dirp;
		dirp = opendir("/sd");
		if(dirp == RT_NULL)
		{
			mkdir("/sd", 0x777);
			rt_kprintf("create SD dir! ");
		}
		
	/* mount sd card fat partition 1 as root directory */
		if (dfs_mount("sd0", "/SD", "elm", 0, 0) == 0)
		{
				rt_kprintf("sd0 filesystem start ok.(/sd) ");
		}
		else
		{
				rt_kprintf("sd0 filesystem start no!(/sd) ");
	//			dfs_mkfs("elm","sd0") ;
		}
	}
	else
	{
	/* mount sd card fat partition 1 as root directory */
		if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
		{
				rt_kprintf("sd0 filesystem start ok.(/.) ");
		}
		else
		{
				rt_kprintf("sd0 filesystem start no!(/.) ");
	//			dfs_mkfs("elm","sd0") ;
		}
	}
//	
//	filepng_entry(RT_NULL);
}
```

![1533177128(1).png](https://oss-club.rt-thread.org/uploads/201808/02/103819fdz0gpdp6kzrdzru.png)