Posted on May 30, 2015 at 02:53This is is very simple project, using stm32f4 discovery and wired microsd socket to read/write data to microsd card.
the code is generated by the stm32f4cubemx.
However error occurs at f_open, tracking down it shows FS_DISK_ERR in ff.c
Please help..
The code for reading/write is:
/* Register the file system object to the FatFs module */
if(f_mount(&SDDISKFatFs, (TCHAR const*)SD_Path, 0) != FR_OK)
{
/* FatFs Initialization Error */
Error_Handler();
}
else
{
LED_ON(ORANGE,1);
/* Create and Open a new text file object with write access */
if(f_open(&MySdFile, ''STM32.TXT'', FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
{
LED_ON(RED,1);
HAL_Delay(2000);
LED_ON(RED,0);HAL_Delay(1000);
/* 'STM32.TXT' file Open for write Error */
Error_Handler();
}
else
{
LED_ON(BLUE,1);
/* Write data to the text file */
res = f_write(&MySdFile, wtext, sizeof(wtext), (void *)&byteswritten);
if((byteswritten == 0) || (res != FR_OK))
{
/* 'STM32.TXT' file Write or EOF Error */
Error_Handler();
}
else
{
LED_ON(GREEN,1);
/* Close the open text file */
f_close(&MySdFile);
/* Open the text file object with read access */
if(f_open(&MySdFile, ''STM32.TXT'', FA_READ) != FR_OK)
{
/* 'STM32.TXT' file Open for read Error */
Error_Handler();
}
else
{
/* Read data from the text file */
res = f_read(&MySdFile, rtext, sizeof(rtext), (void *)&bytesread);
if((bytesread == 0) || (res != FR_OK))
{
/* 'STM32.TXT' file Read or EOF Error */
Error_Handler();
}
else
{
/* Close the open text file */
f_close(&MySdFile);
/* 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(LED4);
}
}
}
}
}
}
