Posted on May 05, 2016 at 13:21
Could anyone help me with the fat fs and f_unlink function ?
I have created a project in STM32CubeMX (version 4.0), then generated C code and MDK-ARM project. The project is in attachment.
I modified Main function as:
while (1)
{
/* USER CODE END WHILE */
MX_USB_HOST_Process();
if (Appli_state== APPLICATION_READY) {
f_mount(&USBDISKFatFs, (TCHAR const*)USBDISKPath, 0);
f_open(&MyFile, (TCHAR const*)''STMTXT'', FA_CREATE_ALWAYS | FA_WRITE);
//f_unlink ((TCHAR const*)''STMTXT'');
f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
f_close(&MyFile);
FATFS_UnLinkDriver(USBDISKPath);
Appli_state=APPLICATION_IDLE;
}
/* USER CODE BEGIN 3 */
}
It creates file STMTXT on my USB disck without any problem, but if i place f_unlink enstead of f_open, it returns '' A hard error occurred in the low level disk I/O layer (01)''
while (1)
{
/* USER CODE END WHILE */
MX_USB_HOST_Process();
if (Appli_state== APPLICATION_READY) {
f_mount(&USBDISKFatFs, (TCHAR const*)USBDISKPath, 0);
// f_open(&MyFile, (TCHAR const*)''STMTXT'', FA_CREATE_ALWAYS | FA_WRITE);
// f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
// f_close(&MyFile);
TRes = f_unlink ((TCHAR const*)''STMTXT'');
USART3->DR = TRes;
FATFS_UnLinkDriver(USBDISKPath);
Appli_state=APPLICATION_IDLE;
}
Thanks for help !
