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/**
******************************************************************************
* @file USB_Host/DynamicSwitch_Standalone/Src/file_operations.c
* @author MCD Application Team
* @brief Write/read file on the disk.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
FATFS USBH_fatfs;
FIL MyFile;
FRESULT res;
uint32_t bytesWritten;
uint8_t rtext[200];
uint8_t wtext [] = "USB Host Library : Mass Storage Example";
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief Files operations: Read/Write and compare
* @param None
* @retval None
*/
void MSC_File_Operations(void)
{
uint32_t bytesread;
/* Register the file system object to the FatFs module */
if(f_mount(&USBH_fatfs, "", 0) != FR_OK )
{
LCD_ErrLog("Cannot Initialize FatFs! \n");
}
else
{
LCD_UsrLog ("INFO : FatFs Initialized \n");
if(f_open(&MyFile, "0:USBHost.txt",FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
{
LCD_ErrLog("Cannot Open 'USBHost.txt' file \n");
}
else
{
LCD_UsrLog ("INFO : 'USBHost.txt' opened for write \n");
res= f_write (&MyFile, wtext, sizeof(wtext), (void *)&bytesWritten);
f_close(&MyFile);
if((bytesWritten == 0) || (res != FR_OK)) /*EOF or Error*/
{
LCD_ErrLog("Cannot Write on the 'USBHost.txt' file \n");
}
else
{
if(f_open(&MyFile, "0:USBHost.txt", FA_READ) != FR_OK)
{
LCD_ErrLog("Cannot Open 'USBHost.txt' file for read.\n");
}
else
{
LCD_UsrLog ("INFO : Text written on the 'USBHost.txt' file \n");
res = f_read(&MyFile, rtext, sizeof(rtext), (void *)&bytesread);
if((bytesread == 0) || (res != FR_OK)) /*EOF or Error*/
{
LCD_ErrLog("Cannot Read from the 'USBHost.txt' file \n");
}
else
{
LCD_UsrLog("Read Text : \n");
LCD_DbgLog((char *)rtext);
LCD_DbgLog("\n");
}
f_close(&MyFile);
}
/* Compare read data with the expected data */
if((bytesread == bytesWritten))
{
LCD_UsrLog ("INFO : FatFs data compare SUCCESS");
LCD_UsrLog("\n");
}
else
{
LCD_ErrLog("FatFs data compare ERROR");
LCD_ErrLog("\n");
}
}
}
}
}