Posted on August 18, 2016 at 15:44Hi
I am trying to use fatfs with my 8gb microsd card on my own stm32f429 board. I use 1-bit sdio configuration and i use the cubemx fatfs example Project for eval board.
if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0)
{
/*♯♯-2- Register the file system object to the FatFs module ♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
if(f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) != FR_OK)
{
/* FatFs Initialization Error */
//Error_Handler();
}
else
{
if(f_mkfs((TCHAR const*)SDPath, 0, 0) != FR_OK)
{
/* FatFs Format Error */
//Error_Handler();
}
else
{
/*♯♯-4- Create and Open a new text file object with write access ♯♯♯♯♯*/
if(f_open(&MyFile, ''STM32.TXT'', FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
{
/* 'STM32.TXT' file Open for write Error */
//Error_Handler();
}
else
{
/*♯♯-5- Write data to the text file ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
if((byteswritten == 0) || (res != FR_OK))
{
/* 'STM32.TXT' file Write or EOF Error */
//Error_Handler();
}
else
{
/*♯♯-6- Close the open text file ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
f_close(&MyFile);
/*♯♯-7- Open the text file object with read access ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
if(f_open(&MyFile, ''STM32.TXT'', FA_READ) != FR_OK)
{
/* 'STM32.TXT' file Open for read Error */
//Error_Handler();
}
else
{
/*♯♯-8- Read data from the text file ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
res = f_read(&MyFile, rtext, sizeof(rtext), (UINT*)&bytesread);
if((bytesread == 0) || (res != FR_OK))
{
/* 'STM32.TXT' file Read or EOF Error */
//Error_Handler();
}
else
{
/*♯♯-9- Close the open text file ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
f_close(&MyFile);
/*♯♯-10- Compare read data with the expected data ♯♯♯♯♯♯♯♯♯♯♯♯*/
if((bytesread != byteswritten))
{
/* Read data is different from the expected data */
//Error_Handler();
}
else
{
/* Success of the demo: no error occurrence */
//BSP_LED_On(LED1);
}
}
}
}
}
}
}
}
FATFS_UnLinkDriver(SDPath);
When debugging, it returns from '' if(f_open(&MyFile, ''STM32.TXT'', FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)'' to error handler, so it can not open the file. What may the problem be? Any advise...
#no-hablo-hal
