RT-Thread的文件系统问题

发布于 2013-11-04 16:46:39 浏览：3758 订阅该版

9 个回答

gongjian32 2013-11-04

这家伙很懒，什么也没写！

gongjian32 2013-11-04

这家伙很懒，什么也没写！

gongjian32 2013-11-04

这家伙很懒，什么也没写！

我挂载了2个文件系统 : sd0是“/",下面的"/spiflash"挂载了spiflash0

```
void rt_init_thread_entry(void* parameter)
{
#ifdef RT_USING_COMPONENTS_INIT
    /* initialization RT-Thread Components */
    rt_components_init();
#endif

rt_platform_init();
	
	rt_kprintf("I'am here!
");

/* Filesystem Initialization */
#ifdef RT_USING_DFS
    {
#ifdef RT_USING_DFS_ELMFAT
        /* mount sd card fat partition 1 as root directory */
       if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
        {
            rt_kprintf("File System initialized!
");
        }
       else
            rt_kprintf("File System initialzation failed!
");
			 
			 #if 0			
				/* mount sd card fat partition 1 as root directory */  
        if (dfs_mount("flash0", "/spiflash", "elm", 0, 0) == 0)  
        {  
            rt_kprintf("flash0 mount to /.
");  
        }  
        else  
				{
						mkfs("elm","flash0");
						if (dfs_mount("flash0", "/spiflash", "elm", 0, 0) == 0)  
						{  
								rt_kprintf("flash0 mount to /.
");  
						}
						else
						{
							rt_kprintf("flash0 mount to / failed.
");
						}
				}
				#endif

#endif
    }
#endif

/* do some thing here. */
		usr_thread_init();
		
		
}
```

用户线程：

```
void usr_thread_init(void)
{
	rt_err_t result;
	result = rt_thread_init(
		&thread_sd, 
		"sdcard",thread_entry_sd, 
		(void*)RT_NULL,
		&thread_sd_stack[0], 
		sizeof(thread_sd_stack), 
		THREAD_PRIORITY_SD, 
		THREAD_TIMESLICE_SD);
	if (result == RT_EOK)
	   rt_thread_startup(&thread_sd);
	//else
	   //tc_stat(TC_STAT_END | TC_STAT_FAILED);

}
```

如果去掉flash0的挂载，就不会出现sd卡里面的问题。
只要挂载2个文件系统，在创建任务的时候就会出现问题。

prife 2013-11-04

这家伙很懒，什么也没写！

>如果把open拿到for(;;)上面，可以将1个文件的内容全部的读出来，read_line()，没有问题。
>可是：我的任务中，要打开N个文件，将里面的配置参数提取出来。不可能1个任务打开1个文件。

---

我在simulator里没有复现这个bug。测试代码如下：

```

#include <dfs_posix.h>
static int read_line(int fd, char *line, int line_size)
{
    char *pos, *next;
    int length;

length = read(fd, line, line_size);
    if (length > 0)
    {
        pos = strstr(line, "
");
        if (pos != NULL)
        {
            *pos = '�';
            next = pos + 1;

/* move back */
            lseek(fd, -(length - (next - line)), SEEK_CUR);

length = pos - line;
        }
        else length = 0;

return length;
    }

return -1;
}
static void rt_test_thread_entry(void *parameter)
{
    int fd;
    static char buffer[1024];
    int line_size;
    //fd = open("/BLACK.Csv",  O_RDONLY, 0);
    for(;;)
    {
        //frame_parse("/BLACK.Csv");
        fd = open("/disk/sd/BLACK.Csv",  DFS_O_RDONLY, 0);
        if (fd < 0)
        {
            rt_kprintf("open file failed!
");
            return;
        }

read_line(fd, buffer, sizeof(buffer));
        rt_kprintf("readd:%s
", buffer);
        rt_thread_delay(30);

close(fd);
        rt_thread_delay(30);
    }
}

#include <finsh.h>
int test()
{
    rt_thread_t tid;

tid = rt_thread_create("test",
                           rt_test_thread_entry, RT_NULL,
                           2048, RT_THREAD_PRIORITY_MAX * 3 / 4, 20);
    if (tid != RT_NULL)
        rt_thread_startup(tid);

return 0;
}

FINSH_FUNCTION_EXPORT(test, test !)

```