/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file            : usb_host.c
  * @version         : v1.0_Cube
  * @brief           : This file implements the USB Host
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "usb_host.h"
#include "usbh_core.h"
#include "usbh_msc.h"

/* USER CODE BEGIN Includes */


#include "fatfs.h"

#include <string.h>
#include "stm32h7xx_hal.h"
#include <stdbool.h>
/** @addtogroup USBH_LIB
  * @{
  */
FATFS myUsbFatFS;//FATFS variable
uint32_t size;
extern char USBHPath[4];   /* USBH logical drive path */
//extern void UsbTest_Read(void);
/* USER CODE END PTD */


bool UsbTest_write(void);

void UsbTest_Read(void);


//FILE IO Variables

FIL myFile;
FRESULT res;
UINT byteswritten,bytesread;
char rwtext[100];

/* USER CODE END Includes */

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USB Host core handle declaration */
USBH_HandleTypeDef hUsbHostHS;
ApplicationTypeDef Appli_state = APPLICATION_IDLE;

/*
 * -- Insert your variables declaration here --
 */
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/*
 * user callback declaration
 */
static void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id);

/*
 * -- Insert your external function declaration here --
 */
/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/**
  * Init USB host library, add supported class and start the library
  * @retval None
  */
void MX_USB_HOST_Init(void)
{
  /* USER CODE BEGIN USB_HOST_Init_PreTreatment */
  
  /* USER CODE END USB_HOST_Init_PreTreatment */
  
  /* Init host Library, add supported class and start the library. */
  if (USBH_Init(&hUsbHostHS, USBH_UserProcess, HOST_HS) != USBH_OK)
  {
    Error_Handler();
  }
  if (USBH_RegisterClass(&hUsbHostHS, USBH_MSC_CLASS) != USBH_OK)
  {
    Error_Handler();
  }
  if (USBH_Start(&hUsbHostHS) != USBH_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USB_HOST_Init_PostTreatment */
  
  /* USER CODE END USB_HOST_Init_PostTreatment */
}

/*
 * Background task
 */
void MX_USB_HOST_Process(void)
{
  /* USB Host Background task */
  USBH_Process(&hUsbHostHS);
}
/*
 * user callback definition
 */
static void USBH_UserProcess  (USBH_HandleTypeDef *phost, uint8_t id)
{
  /* USER CODE BEGIN CALL_BACK_1 */
  switch(id)
  {
  case HOST_USER_SELECT_CONFIGURATION:
  break;

  case HOST_USER_DISCONNECTION:
  Appli_state = APPLICATION_DISCONNECT;
  break;

  case HOST_USER_CLASS_ACTIVE:

  Appli_state = APPLICATION_READY;
  UsbTest_Read();

  break;

  case HOST_USER_CONNECTION:
  Appli_state = APPLICATION_START;
  if(f_mount(&myUsbFatFS, (TCHAR const*)USBHPath,0)==FR_OK)
                             			        				   {
                             			      					   printf("Ff-mount function\n\t");
                             			        //					   flag=1;
                             			        				   }

  break;

  default:
  break;
  }
  /* USER CODE END CALL_BACK_1 */
}

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
bool UsbTest_write(void)
{
	//Open and Created file for writing
	if(f_open(&myFile,"LD.BIN",FA_CREATE_ALWAYS | FA_WRITE)!=FR_OK)
	{
		return 0;
	}
	else
	{
		//copy to string into the temporary variable
		sprintf(rwtext ,"Froom MANOJ");
		//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);
		return 1;
	}
}


void UsbTest_Read(void)
{

	res=f_open(&myFile, "FW.ABS",   FA_READ);
	if (res == FR_OK)
	{
		printf("File PRODUCT_FP2043T_V2_FW.ABS sucessfully opened!\n");
	}
	size = f_size(&myFile);
	char * data = NULL;
	data = malloc(size); /* allocate memory to store image data */
	printf("File size: %lu bytes\n", size);
	res = f_read(&myFile, data, (uint32_t) size, &bytesread);

	  if (res == FR_OK){
	                    printf("File successfully read!\n");
	                    printf("%d bytes read\n", bytesread);
	                    for (int i=0; i < bytesread; i++)
	                    {
	                        printf("data[%d]: 0x%x\n", i, data[i]);
	                    }
	                }
	                 free(data); // free allocated memory when you don't need it

	                  f_close(&myFile);

}