I'm trying to write data to usb memory stick with stm32f107. Main function is:
while (1)
{
/* USER CODE END WHILE */
MX_USB_HOST_Process();
/* USER CODE BEGIN 3 */
switch(Appli_state)
{
case APPLICATION_IDLE:
break;
case APPLICATION_START:
counter_start++;
if(f_mount(&myUsbFatFS, (TCHAR const*)USBH_Path, 0) == FR_OK)
{
UsbTest_Write();
}
break;
case APPLICATION_READY:
break;
case APPLICATION_DISCONNECT:
break;
}
}
Write function is :
bool UsbTest_Write(void)
{
//Open or Create file for writing
if(f_open(&myFile, "a.csv", FA_WRITE | FA_OPEN_ALWAYS ) != FR_OK)
{
return 0;
}
//Copy test Text to my temporary read/write buffer
f_lseek(&myFile,myFile.fsize);
sprintf(rwtext, "test\n");
//Write to text file
res = f_write(&myFile, (const void *)rwtext, strlen(rwtext), &byteswritten);
if((res != FR_OK) || (byteswritten == 0))
{
return 0;
f_close(&myFile);
}
f_close(&myFile);
return 1; //Success
}
I have 2GB usb memory stick and it works without any problem. When i try to write the other memory sticks that 8GB and 16GB it's not write. I debugged and
f_open()->find_volume()->get_ldnumber()
get_idnumber() function returns 0 so f_open() function return FR_DISK_ERR.
what can be the reason and how to solve this problem?