/**
  ******************************************************************************
  * @file    DMA/DMA_FLASHToRAM/Src/main.c
  * @author  MCD Application Team
  * @brief   This example provides a description of how to use a DMA channel
  *          to transfer a word data buffer from FLASH memory to embedded
  *          SRAM memory through the STM32F0xx HAL API.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 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 STM32F0xx_HAL_Examples
  * @{
  */

/** @addtogroup DMA_FLASHToRAM
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* DMA Handle declaration */
DMA_HandleTypeDef     DmaHandle;

static const uint32_t aSRC_Const_Buffer[BUFFER_SIZE] =
{
  0x01020304, 0x05060708, 0x090A0B0C, 0x0D0E0F10,
  0x11121314, 0x15161718, 0x191A1B1C, 0x1D1E1F20,
  0x21222324, 0x25262728, 0x292A2B2C, 0x2D2E2F30,
  0x31323334, 0x35363738, 0x393A3B3C, 0x3D3E3F40,
  0x41424344, 0x45464748, 0x494A4B4C, 0x4D4E4F50,
  0x51525354, 0x55565758, 0x595A5B5C, 0x5D5E5F60,
  0x61626364, 0x65666768, 0x696A6B6C, 0x6D6E6F70,
  0x71727374, 0x75767778, 0x797A7B7C, 0x7D7E7F80
};

static uint32_t aDST_Buffer[BUFFER_SIZE];

static __IO uint32_t transferErrorDetected; /* Set to 1 if an error transfer is detected */

/* Private function prototypes -----------------------------------------------*/
static void DMA_Config(void);
static void SystemClock_Config(void);
static void Error_Handler(void);
static void TransferComplete(DMA_HandleTypeDef *DmaHandle);
static void TransferError(DMA_HandleTypeDef *DmaHandle);

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

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* STM32F0xx HAL library initialization:
       - Configure the Flash prefetch
       - Systick timer is configured by default as source of time base, but user 
         can eventually implement his proper time base source (a general purpose 
         timer for example or other time source), keeping in mind that Time base 
         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
         handled in milliseconds basis.
       - Low Level Initialization
     */
  HAL_Init();

  /* Configure the system clock to 48 MHz */
  SystemClock_Config();

  /* Initialize LED */
  BSP_LED_Init(LED2);

  /* Set to 1 if an transfer error is detected */
  transferErrorDetected = 0;

  /* Configure and enable the DMA channel for Memory to Memory transfer */
  DMA_Config();

  /* Infinite loop */
  while (1)
  {
    if (transferErrorDetected == 1)
    {
      /* Toggle LED2 with a period of 200 ms */
      BSP_LED_Toggle(LED2);
      HAL_Delay(200);
    }
  }
}

/**
  * @brief  Configure the DMA controller according to the parameters
  *         defined in main.h file
  * @note  This function is used to :
  *        -1- Enable DMA1 clock
  *        -2- Select the DMA functional Parameters
  *        -3- Select the DMA instance to be used for the transfer
  *        -4- Initialize the DMA channel
  *        -5- Select Callbacks functions called after Transfer complete and
  *            Transfer error interrupt detection
  *        -6- Configure NVIC for DMA transfer complete/error interrupts
  *        -7- Start the DMA transfer using the interrupt mode
  * @param  None
  * @retval None
  */
static void DMA_Config(void)
{
  /*## -1- Enable DMA1 clock #################################################*/
  __HAL_RCC_DMA1_CLK_ENABLE();

  /*##-2- Select the DMA functional Parameters ###############################*/
  DmaHandle.Init.Direction = DMA_MEMORY_TO_MEMORY;          /* M2M transfer mode                */
  DmaHandle.Init.PeriphInc = DMA_PINC_ENABLE;               /* Peripheral increment mode Enable */
  DmaHandle.Init.MemInc = DMA_MINC_ENABLE;                  /* Memory increment mode Enable     */
  DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; /* Peripheral data alignment : Word */
  DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;    /* memory data alignment : Word     */
  DmaHandle.Init.Mode = DMA_NORMAL;                         /* Normal DMA mode                  */
  DmaHandle.Init.Priority = DMA_PRIORITY_HIGH;              /* priority level : high            */

  /*##-3- Select the DMA instance to be used for the transfer : DMA1_Channel1 #*/
  DmaHandle.Instance = DMA_INSTANCE;

  /*##-4- Initialize the DMA channel ##########################################*/
  if (HAL_DMA_Init(&DmaHandle) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }
  
  /*##-5- Select Callbacks functions called after Transfer complete and Transfer error */
  HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_CPLT_CB_ID, TransferComplete);
  HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_ERROR_CB_ID, TransferError);

  /*##-6- Configure NVIC for DMA transfer complete/error interrupts ##########*/
  /* Set Interrupt Group Priority */
  HAL_NVIC_SetPriority(DMA_INSTANCE_IRQ, 0, 0);

  /* Enable the DMA global Interrupt */
  HAL_NVIC_EnableIRQ(DMA_INSTANCE_IRQ);

  /*##-7- Start the DMA transfer using the interrupt mode ####################*/
  /* Configure the source, destination and buffer size DMA fields and Start DMA transfer */
  /* Enable All the DMA interrupts */
  if (HAL_DMA_Start_IT(&DmaHandle, (uint32_t)&aSRC_Const_Buffer, (uint32_t)&aDST_Buffer, BUFFER_SIZE) != HAL_OK)
  {
    /* Transfer Error */
    Error_Handler();
  }
}

/**
  * @brief  DMA conversion complete callback
  * @note   This function is executed when the transfer complete interrupt
  *         is generated
  * @retval None
  */
static void TransferComplete(DMA_HandleTypeDef *DmaHandle)
{
  /* Turn LED2 on: Transfer correct */
  BSP_LED_On(LED2);
}

/**
  * @brief  DMA conversion error callback
  * @note   This function is executed when the transfer error interrupt
  *         is generated during DMA transfer
  * @retval None
  */
static void TransferError(DMA_HandleTypeDef *DmaHandle)
{
  transferErrorDetected = 1;
}

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSI48)
  *            SYSCLK(Hz)                     = 48000000
  *            HCLK(Hz)                       = 48000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 1
  *            HSI Frequency(Hz)              = 48000000
  *            PREDIV                         = 2
  *            PLLMUL                         = 2
  *            Flash Latency(WS)              = 1
  * @param  None
  * @retval None
  */
static void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  
  /* Select HSI48 Oscillator as PLL source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI48;
  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
  {
    Error_Handler();
  }

  /* Select PLL as system clock source and configure the HCLK and PCLK1 clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
static void Error_Handler(void)
{
  while (1)
  {
    /* Toggle LED2 with a period of 1 s */
    BSP_LED_Toggle(LED2);
    HAL_Delay(1000);
  }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif
/**
  * @}
  */

/**
  * @}
  */

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