/**
  ******************************************************************************
  * @file    sd.c 
  * @author  MCD Application Team
  * @brief   This example code shows how to use the SD Driver
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 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"

/** @addtogroup STM32F0xx_HAL_Examples
  * @{
  */

/** @addtogroup BSP
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define BLOCK_START_ADDR         0     /* Block start address      */
#define BLOCKSIZE                512   /* Block Size in Bytes      */
#define NUM_OF_BLOCKS            5     /* Total number of blocks   */
#define BUFFER_WORDS_SIZE        ((BLOCKSIZE * NUM_OF_BLOCKS) >> 2) /* Total data size in bytes */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint32_t aTxBuffer[BUFFER_WORDS_SIZE];
uint32_t aRxBuffer[BUFFER_WORDS_SIZE];
SD_CardInfo CardInfo;
/* Private function prototypes -----------------------------------------------*/
static void SD_SetHint(void);
static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset);
static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  SD Demo
  * @param  None
  * @retval None
  */
void SD_demo (void)
{ 
  uint8_t SD_state = MSD_OK;
  __IO uint8_t prev_status = 0; 

  SD_SetHint();

  SD_state = BSP_SD_Init();

   /* Check if the SD card is plugged in the slot */
  if(BSP_SD_IsDetected() == SD_PRESENT)
  {
    BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
    BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"SD Connected    ", LEFT_MODE);
  }
  else 
  {
    BSP_LCD_SetTextColor(LCD_COLOR_RED);
    BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"SD Not Connected", LEFT_MODE);
  }
  BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
  
  if(SD_state != MSD_OK)
  {
    BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SD INITIALIZATION : FAIL.", LEFT_MODE);
    BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SD Test Aborted.", LEFT_MODE);
  }
  else
  {
    BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SD INITIALIZATION : OK.", LEFT_MODE); 
    
    SD_state = BSP_SD_GetCardInfo(&CardInfo);

  if(SD_state != MSD_OK)
    {
      BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SD GET CARD INFO : FAIL.", LEFT_MODE);
      BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SD Test Aborted.", LEFT_MODE);
    }
    else
    {
      BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SD GET CARD INFO : OK.", LEFT_MODE);

      SD_state = BSP_SD_Erase(BLOCK_START_ADDR, (BLOCKSIZE * NUM_OF_BLOCKS));
    
      /* Verify that SD card is ready to use after the Erase */
      SD_state |= BSP_SD_GetStatus();

      if(SD_state != MSD_OK)
      {
        BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SD ERASE : FAILED.", LEFT_MODE);
        BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SD Test Aborted.", LEFT_MODE);
      }
      else
      {
        BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SD ERASE : OK.", LEFT_MODE);
      
        /* Fill the buffer to write */
        Fill_Buffer(aTxBuffer, BUFFER_WORDS_SIZE, 0x22FF);
        SD_state = BSP_SD_WriteBlocks((uint32_t *)aTxBuffer, BLOCK_START_ADDR, BLOCKSIZE, NUM_OF_BLOCKS);
      
        if(SD_state != MSD_OK)
        {
          BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SD WRITE : FAILED.", LEFT_MODE);
          BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SD Test Aborted.", LEFT_MODE);
        }
        else
        {
          BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SD WRITE : OK.", LEFT_MODE);
          SD_state = BSP_SD_ReadBlocks((uint32_t *)aRxBuffer, BLOCK_START_ADDR, BLOCKSIZE, NUM_OF_BLOCKS);
          if(SD_state != MSD_OK)
          {
            BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SD READ : FAILED.", LEFT_MODE);
            BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SD Test Aborted.", LEFT_MODE);
          }
          else
          {
            BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SD READ : OK.", LEFT_MODE);
            if(Buffercmp(aTxBuffer, aRxBuffer, BUFFER_WORDS_SIZE) > 0)
            {
              BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SD COMPARE : FAILED.", LEFT_MODE);
              BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SD Test Aborted.", LEFT_MODE);
            }
            else
            {
              BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SD TEST : OK.", LEFT_MODE);
            }
          }
        }
      }
    }
  }
  
  while (1)
  {
    /* Check if the SD card is plugged in the slot */
    if(BSP_SD_IsDetected() != SD_PRESENT)
    {
      if(prev_status == 0)
      {
        prev_status = 1; 
        BSP_LCD_SetTextColor(LCD_COLOR_RED);
        BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"SD Not Connected", LEFT_MODE);
      }
    }
    else if (prev_status == 1)
    {
      BSP_SD_Init();
      BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
      BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"SD Connected    ", LEFT_MODE);
      prev_status = 0;
    }
    
    if(CheckForUserInput() > 0)
    {
      return;
    }
  }
}

/**
  * @brief  Display SD Demo Hint
  * @param  None
  * @retval None
  */
static void SD_SetHint(void)
{
  /* Clear the LCD */ 
  BSP_LCD_Clear(LCD_COLOR_WHITE);
  
  /* Set LCD Demo description */
  BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
  BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
  BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
  BSP_LCD_SetBackColor(LCD_COLOR_BLUE); 
  BSP_LCD_SetFont(&Font24);
  BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"SD", CENTER_MODE);
  BSP_LCD_SetFont(&Font12);
  BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"This example shows how to write", CENTER_MODE);
  BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"and read data on the microSD and also", CENTER_MODE); 
  BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"how to detect the presence of the card", CENTER_MODE); 

   /* Set the LCD Text Color */
  BSP_LCD_SetTextColor(LCD_COLOR_BLUE);  
  BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize()- 100);
  BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize()- 102);
  
  BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
  BSP_LCD_SetBackColor(LCD_COLOR_WHITE); 
 }

/**
  * @brief  Fills buffer with user predefined data.
  * @param  pBuffer: pointer on the buffer to fill
  * @param  uwBufferLenght: size of the buffer to fill
  * @param  uwOffset: first value to fill on the buffer
  * @retval None
  */
static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset)
{
  uint32_t tmpIndex = 0;

  /* Put in global buffer different values */
  for (tmpIndex = 0; tmpIndex < uwBufferLenght; tmpIndex++ )
  {
    pBuffer[tmpIndex] = tmpIndex + uwOffset;
  }
}

/**
  * @brief  Compares two buffers.
  * @param  pBuffer1, pBuffer2: buffers to be compared.
  * @param  BufferLength: buffer's length
  * @retval 1: pBuffer identical to pBuffer1
  *         0: pBuffer differs from pBuffer1
  */
static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength)
{
  while (BufferLength--)
  {
    if (*pBuffer1 != *pBuffer2)
    {
      return 1;
    }

    pBuffer1++;
    pBuffer2++;
  }

  return 0;
}
/**
  * @}
  */ 

/**
  * @}
  */