Can RL_USB run together with FATFS?

Is that means:

/*ps:
1:project use USB.
2:STM32.TXT in 2nd partition.
3:boot.TXT in main partition*/

/* Definitions of physical drive number for each media */
#define ATA             0
#define MMC             1
#define USB             2

#define _MULTI_PARTITION        1       /* 0:Single partition, 1/2:Enable multiple partition */

#if _MULTI_PARTITION == 1
PARTITION VolToPart[] =
{
        {2, 1},
        {2, 2},
        {1,0}
};
#endif

/*in main function*/

/*USB == 2*/
res = f_mount(USB,&Fatfs[2]);            /*can't mount volume, and return FR_NO_FILESYSTEM*/
if(res != FR_OK)
{
        printf("2:mount fs error :%d \r\n",res);
}

...

f_mount(USB, NULL);

res = f_mount(1,&Fatfs[1]);            /*mount volume success*/
if(res != FR_OK)
{
        printf("1:mount fs error :%d \r\n",res);
}

/*open file fail, return FR_NO_FILESYSTEM*/
res = f_open(&fsrc, "1:/STM32.TXT", FA_OPEN_EXISTING | FA_READ);
if(res != FR_OK)
{
        printf("open file error : %d\r\n",res);
}
else
{
        printf("open file success...\r\n");
        f_close(&fsrc);
}
f_mount(1, NULL);

res = f_mount(0,&Fatfs[0]);          /*mount volume success*/
if(res != FR_OK)
{
        printf("0:mount fs error :%d \r\n",res);
}

/*open file success*/
res = f_open(&fsrc, "0:/boot.TXT", FA_OPEN_EXISTING | FA_READ);
if(res != FR_OK)
{
        printf("open file error : %d\r\n",res);
}
else
{
        printf("open file success...\r\n");
        f_close(&fsrc);
}
f_mount(0, NULL);

I read the user manua but did know why?

any ideas to mount partition?

Is that means:

/*ps:
1:project use USB.
2:STM32.TXT in 2nd partition.
3:boot.TXT in main partition*/

/* Definitions of physical drive number for each media */
#define ATA             0
#define MMC             1
#define USB             2

#define _MULTI_PARTITION        1       /* 0:Single partition, 1/2:Enable multiple partition */

#if _MULTI_PARTITION == 1
PARTITION VolToPart[] =
{
        {2, 1},
        {2, 2},
        {1,0}
};
#endif

/*in main function*/

/*USB == 2*/
res = f_mount(USB,&Fatfs[2]);            /*can't mount volume, and return FR_NO_FILESYSTEM*/
if(res != FR_OK)
{
        printf("2:mount fs error :%d \r\n",res);
}

...

f_mount(USB, NULL);

res = f_mount(1,&Fatfs[1]);            /*mount volume success*/
if(res != FR_OK)
{
        printf("1:mount fs error :%d \r\n",res);
}

/*open file fail, return FR_NO_FILESYSTEM*/
res = f_open(&fsrc, "1:/STM32.TXT", FA_OPEN_EXISTING | FA_READ);
if(res != FR_OK)
{
        printf("open file error : %d\r\n",res);
}
else
{
        printf("open file success...\r\n");
        f_close(&fsrc);
}
f_mount(1, NULL);

res = f_mount(0,&Fatfs[0]);          /*mount volume success*/
if(res != FR_OK)
{
        printf("0:mount fs error :%d \r\n",res);
}

/*open file success*/
res = f_open(&fsrc, "0:/boot.TXT", FA_OPEN_EXISTING | FA_READ);
if(res != FR_OK)
{
        printf("open file error : %d\r\n",res);
}
else
{
        printf("open file success...\r\n");
        f_close(&fsrc);
}
f_mount(0, NULL);

I read the user manua but did know why?

any ideas to mount partition?

How many logical "_VOLUMES" did you assign?

ffconf.h

#define _VOLUMES        1  // <--- 3
/* Number of volumes (logical drives) to be used. */

Tsuneo

I am sorry to tell you that i have defined _VOLUMES

#define _VOLUMES        3
/* Number of volumes (logical drives) to be used. */

hard disk has two logical partition.

i try to use _VOLUMES == 2

and

PARTITION VolToPart[] =
{ {2, 1}, {2, 2}
};

the same error.

1.
res = f_mount(USB,&Fatfs[2]); /*can't mount volume, and return FR_NO_FILESYSTEM*/

2.
res = f_mount(1,&Fatfs[1]); /*mount volume success but open file fail, return FR_NO_FILESYSTEM*/
...
res = f_open(&fsrc, "1:/STM32.TXT", FA_OPEN_EXISTING | FA_READ);

3.
res = f_mount(0,&Fatfs[0]); /*mount volume success and open file success*/
...
res = f_open(&fsrc, "0:/boot.TXT", FA_OPEN_EXISTING | FA_READ);