FATFS例程里f_mount(fs[0],"0:",1) 挂载SD函数求解

15254283592 · 发表于 2017-3-15 18:56:50

main中这么两句话：
f_mount(fs[0],"0:",1); //挂载SD卡
res=f_mount(fs[1],"1:",1); //挂载FLASH

FATFS例程里main函数里为啥这两个函数是挂载SD卡和FLASH，如何区分是SD和FLASH？怎么看出来的？goto进去咋啥也看不出呢，求助各位大侠
这是设置注册区（挂载）的子函数源码
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

o 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);

}