/**
  ******************************************************************************
  * @file    BSP/Src/sdram_dma.c
  * @author  MCD Application Team
  * @brief   This example code shows how to use the SDRAM Driver
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/** @addtogroup STM32F4xx_HAL_Examples
  * @{
  */

/** @addtogroup BSP
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define SDRAM_DMA_BUFFER_SIZE  ((uint32_t)256)

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static uint32_t sdram_aTxBuffer[SDRAM_DMA_BUFFER_SIZE];
static uint32_t sdram_aRxBuffer[SDRAM_DMA_BUFFER_SIZE];
extern SDRAM_HandleTypeDef sdramHandle;
//DMA_HandleTypeDef   hdma;
/* DMA transfer complete flag */
__IO uint32_t uwDMA_Transfer_Complete = 0;

/* Private function prototypes -----------------------------------------------*/
static void SDRAM_DMA_SetHint(void);
static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset);
static uint8_t Buffercmp(uint32_t* pBuffer1, uint32_t* pBuffer2, uint16_t BufferLength);


/* Private functions ---------------------------------------------------------*/

/**
  * @brief  SDRAM Demo
  * @param  None
  * @retval None
  */
void SDRAM_DMA_demo (void)
{

  SDRAM_DMA_SetHint();

  /* -1- SDRAM device configuration */
  if (BSP_SDRAM_Init() != SDRAM_OK)
  {
    BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SDRAM Initialization : FAILED.", LEFT_MODE);
    BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM Test Aborted.", LEFT_MODE);
  }
  else
  {
    BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"SDRAM Initialization : OK.", LEFT_MODE);
  }

  /* -2- Fill the buffer to write */
  Fill_Buffer(sdram_aTxBuffer, SDRAM_DMA_BUFFER_SIZE, 0xA244250F);

  /* -3- Write data to the SDRAM memory using DMA */
  uwDMA_Transfer_Complete = 0;
  if (BSP_SDRAM_WriteData_DMA((SDRAM_WRITE_READ_ADDR + SDRAM_WRITE_READ_ADDR_OFFSET), sdram_aTxBuffer, SDRAM_DMA_BUFFER_SIZE) != SDRAM_OK)
  {
    BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SDRAM WRITE dma : FAILED.", LEFT_MODE);
    BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM Test Aborted.", LEFT_MODE);
  }
  else
  {
    BSP_LCD_DisplayStringAt(20, 115, (uint8_t *)"SDRAM WRITE DMA : REQUESTED", LEFT_MODE);
  }

  /* Wait until DMA transfer is complete */
  while (!uwDMA_Transfer_Complete)
  {}
  BSP_LCD_DisplayStringAt(20, 130, (uint8_t *)"SDRAM WRITE DMA : COMPLETED", LEFT_MODE);

  /* -4- Read back data from the SDRAM memory using DMA */
  uwDMA_Transfer_Complete = 0;
  if (BSP_SDRAM_ReadData_DMA((SDRAM_WRITE_READ_ADDR + SDRAM_WRITE_READ_ADDR_OFFSET), sdram_aRxBuffer, SDRAM_DMA_BUFFER_SIZE) != SDRAM_OK)
  {
    BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SDRAM  READ DMA : FAILED", LEFT_MODE);
    BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM  Test Aborted", LEFT_MODE);
  }
  else
  {
    BSP_LCD_DisplayStringAt(20, 145, (uint8_t *)"SDRAM READ  DMA : REQUESTED", LEFT_MODE);
  }

  /* Wait until DMA transfer is complete */
  while (!uwDMA_Transfer_Complete)
  {}
  BSP_LCD_DisplayStringAt(20, 160, (uint8_t *)"SDRAM READ  DMA : COMPLETED", LEFT_MODE);

  /* -5- Compare both buffers */
  if (Buffercmp(sdram_aTxBuffer, sdram_aRxBuffer, SDRAM_DMA_BUFFER_SIZE) > 0)
  {
    BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SDRAM COMPARE : FAILED.", LEFT_MODE);
    BSP_LCD_DisplayStringAt(20, 190, (uint8_t *)"SDRAM Test Aborted.", LEFT_MODE);
  }
  else
  {
    BSP_LCD_DisplayStringAt(20, 175, (uint8_t *)"SDRAM TEST      : SUCCESSFULL", LEFT_MODE);
  }

  while (1)
  {
    if (CheckForUserInput() > 0)
    {
      return;
    }
  }
}

/**
  * @brief  DMA conversion complete callback
  * @note   This function is executed when the transfer complete interrupt
  *         is generated
  * @retval None
  */
void HAL_SDRAM_DMA_XferCpltCallback(DMA_HandleTypeDef *hdma)
{
  /* Set transfer complete flag */
  uwDMA_Transfer_Complete = 1;
}

/**
  * @brief  DMA transfer complete error callback.
  * @param  hdma: DMA handle
  * @retval None
  */

void HAL_SDRAM_DMA_XferErrorCallback(DMA_HandleTypeDef *hdma)
{
  BSP_LCD_SetTextColor(LCD_COLOR_RED);
  BSP_LCD_DisplayStringAt(20, 215, (uint8_t *)"DMA ERROR", LEFT_MODE);
}
/**
  * @brief  Display SDRAM Demo Hint
  * @param  None
  * @retval None
  */
static void SDRAM_DMA_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 *)"SDRAM DMA", 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 SDRAM", 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  uwBufferLength: 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 uwBufferLength, uint32_t uwOffset)
{
  uint32_t tmpIndex = 0;

  /* Put in global buffer different values */
  for (tmpIndex = 0; tmpIndex < uwBufferLength; 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;
}
/**
  * @}
  */

/**
  * @}
  */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/