stm32移植fatfs+sd卡到rt thread nano的相关问题

发布于 2021-09-19 22:39:08 浏览：1357 订阅该版

我在移植野火的sd卡程序到裸机可以运行，但是一直到RTT就无法这些，调试显示是SD卡初始化失败，返回了错误3的指令，我查找不到问题，不知道哪里出现了问题，有没有人遇到过并解决了这个问题的麻烦帮助一下，在下先谢谢了。
```c
/*-----------------------------------------------------------------------*/
/* Mount/Unmount a Logical Drive                                         */
/*-----------------------------------------------------------------------*/

FRESULT f_mount (
	FATFS* fs,			/* Pointer to the file system object (NULL:unmount)*/
	const TCHAR* path,	/* Logical drive number to be mounted/unmounted */
	BYTE opt			/* 0:Do not mount (delayed mount), 1:Mount immediately */
)
{
	FATFS *cfs;
	int vol;
	FRESULT res;
	const TCHAR *rp = path;

vol = get_ldnumber(&rp);
	if (vol < 0) return FR_INVALID_DRIVE;
	cfs = FatFs[vol];					/* Pointer to fs object */

if (cfs) {
    #if _FS_LOCK
       clear_lock(cfs);
    #endif
    
     #if _FS_REENTRANT						/* Discard sync object of the current 
         volume */
	  if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
    #endif
          cfs->fs_type = 0;				/* Clear old fs object */
	}

if (fs) {
	fs->fs_type = 0;				/* Clear new fs object */
   #if _FS_REENTRANT						/* Create sync object for the new volume */
	if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
   #endif
	}
	FatFs[vol] = fs;					/* Register new fs object */
	if (!fs || opt != 1) return FR_OK;	/* Do not mount now, it will be mounted later */
	res = find_volume(&fs, &path, 0);	/* Force mounted the volume */
	LEAVE_FF(fs, res);
}
```