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   源码介绍

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STM32H7 USB_OTG_FATFS_FreeRTOS HAL库例子，可直接编译使用

void FS_FileOperations(void)
{
  FRESULT res;                                          /* FatFs function common result code */
  uint32_t byteswritten, bytesread;                     /* File write/read counts */
  uint8_t wtext[] = "This is STM32 working with FatFs USB RTOS"; /* File write buffer */
  uint8_t rtext[100];                                   /* File read buffer */
  
  /* Register the file system object to the FatFs module */
  if(f_mount(&USBDISKFatFs, "", 0) == FR_OK)
  {
    /* Create and Open a new text file object with write access */
    if(f_open(&MyFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) == FR_OK) 
    {
      /* Write data to the text file */
      res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
      
      if((byteswritten > 0) && (res == FR_OK))
      {
        /* Close the open text file */
        f_close(&MyFile);
        
        /* Open the text file object with read access */
        if(f_open(&MyFile, "STM32.TXT", FA_READ) == FR_OK)
        {
          /* Read data from the text file */
          res = f_read(&MyFile, rtext, sizeof(rtext), (void *)&bytesread);
          
          if((bytesread > 0) && (res == FR_OK))
          {
            /* Close the open text file */
            f_close(&MyFile);
            
            /* Compare read data with the expected data */
            if((bytesread == byteswritten))
            {                             
              /* Success of the demo: no error occurrence */
              BSP_LED_On(LED1);
              return;              
            }
          }
        }
      }
    }
  }
  /* Error */
  BSP_LED_On(LED3);
}