Posted on March 12, 2018 at 16:54 Hello,
I have problem when I use FATFS with my STM32F2.
My code come from example STM32-Tools\STM32_FW_libraries\HAL_CUBEMX_libs\STM32Cube_FW_F2_V1.6.0\Projects\STM32F207ZG-Nucleo\Applications\FatFs\FatFs_USBDisk\
It's works very well but only one time (with this example and in my code)
Normally
these functions should allow a reset of the FAT ?
- FATFS_UnLinkDriver(USBDISKPath);
- f_mount(NULL, (TCHAR const*)'', 0);
When I plug again my USB key (after the first good test) , I have problem with function
res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
res return FR_NO_FILESYSTEM
it seems that the unlink function doesn't work correctly
if(FATFS_LinkDriver(&USBH_Driver, USBDISKPath) == 0)
{
USBH_Init(&hUSB_Host, USBH_UserProcess, 0);
USBH_RegisterClass(&hUSB_Host, USBH_MSC_CLASS);
USBH_Start(&hUSB_Host);
while (1)
{
USBH_Process(&hUSB_Host);
switch(Appli_state)
{
case APPLICATION_START:
MSC_Application();
Appli_state = APPLICATION_IDLE;
break;
case APPLICATION_IDLE:
default:
break;
}
}
}
static void MSC_Application(void)
{
FRESULT res; /* FatFs function common result code */
uint32_t byteswritten, bytesread; /* File write/read counts */
uint8_t wtext[] = 'This is STM32 working with FatFs'; /* File write buffer */
uint8_t rtext[100]; /* File read buffer */
/* Register the file system object to the FatFs module */
if(f_mount(&USBDISKFatFs, (TCHAR const*)USBDISKPath, 0) != FR_OK)
{
/* FatFs Initialization Error */
Error_Handler();
}
else
{
/* Create and Open a new text file object with write access */
if(f_open(&MyFile, 'STMTXT', FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
{
/* 'STMTXT' file Open for write Error */
Error_Handler();
}
else
{
/* Write data to the text file */
res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
....
.....
.....
/* Unlink the USB disk I/O driver */
FATFS_UnLinkDriver(USBDISKPath);
}
static void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id)
{
switch(id)
{
case HOST_USER_SELECT_CONFIGURATION:
break;
case HOST_USER_DISCONNECTION:
Appli_state = APPLICATION_IDLE;
BSP_LED_Off(LED1);
BSP_LED_Off(LED3);
f_mount(NULL, (TCHAR const*)'', 0);
break;
case HOST_USER_CLASS_ACTIVE:
Appli_state = APPLICATION_START;
break;
default:
break;
}
}�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?
FATFS USBDISKFatFs; /* File system object for USB disk logical drive */
FIL MyFile; /* File object */
char USBDISKPath[4]; /* USB Host logical drive path */
USBH_HandleTypeDef hUSB_Host; /* USB Host handle */
typedef enum {
APPLICATION_IDLE = 0,
APPLICATION_START,
APPLICATION_RUNNING,
}MSC_ApplicationTypeDef;
MSC_ApplicationTypeDef Appli_state = APPLICATION_IDLE;�?�?�?�?�?�?�?�?�?�?�?�?
I would like to avoid a reset if possible,
Thanks,
Nico
