/**
  ******************************************************************************
  * @file    Examples_MIX/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 STM32F3xx DMA HAL and LL 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 STM32F3xx_MIX_Examples
  * @{
  */

/** @addtogroup DMA_FLASHToRAM
  * @{
  */

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

/* DMA Instance and Channel declaration */
DMA_TypeDef*  DmaInstance;
uint32_t      DmaChannel;

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 */
static __IO uint32_t transferCompleteDetected; /* Set to 1 if transfer is correctly completed */

/* Private function prototypes -----------------------------------------------*/
static void DMA_Config(void);
void        SystemClock_Config(void);
static void Error_Handler(void);

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

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /* STM32F3xx 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.
       - Set NVIC Group Priority to 4
       - Low Level Initialization
     */
  HAL_Init();

  /* Configure the system clock to 64 MHz */
  SystemClock_Config();

  /* Initialize LED */
  BSP_LED_Init(LED2);

  /* Set to 1 if an transfer error is detected */
  transferErrorDetected = 0;
  transferCompleteDetected = 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);
  }
    if (transferCompleteDetected == 1)
    {
      /* Turn LED2 on*/
      BSP_LED_On(LED2);
      transferCompleteDetected = 0;
    } 
  }
}

/**
  * @brief  Configure the DMA controller according to the Channel 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- Configure NVIC for DMA transfer complete/error interrupts
  *        -6- Configure and 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- Configure NVIC for DMA transfer complete/error interrupts ##########*/
  /* Set Interrupt Group Priority */
  HAL_NVIC_SetPriority(DMA_INSTANCE_IRQ, 0, 0);

  /* Enable the DMA Channel global Interrupt */
  HAL_NVIC_EnableIRQ(DMA_INSTANCE_IRQ);
  
  /*##-6- Configure and start the DMA transfer using the interrupt mode ######*/
  /* Enable All the DMA interrupts */

  /* Using HAL interface, use :                                   */
  /* - HAL_DMA_Start_IT() to Configure and start the DMA transfer */
  /*                      using the interrupt mode.               */

  /* Using LL interface, use :                                               */
  /* - __LL_DMA_GET_INSTANCE() to convert DMA1_Channel1 into DMA1            */
  /* - __LL_DMA_GET_CHANNEL() to convert DMA1_Channel1 into LL_DMA_CHANNEL_1 */ 
  /* - LL_DMA_ConfigAddresses() to configure addresses source, destination   */
  /* - LL_DMA_SetDataLength() to configure data length to transfer           */
  /* - LL_DMA_EnableIT_TC() to enable Transfer Complete Interrupt            */
  /* - LL_DMA_EnableIT_TE() to enable Transfer Error Interrupt               */
  /* - LL_DMA_EnableChannel() to enable DMA Transfer                         */
  /* ########## Starting from this point HAL API must not be used ########## */
  DmaInstance        = __LL_DMA_GET_INSTANCE(DmaHandle.Instance);
  DmaChannel         = __LL_DMA_GET_CHANNEL(DmaHandle.Instance);
  LL_DMA_ConfigAddresses(DmaInstance, DmaChannel, 
                               (uint32_t)&aSRC_Const_Buffer, 
                               (uint32_t)&aDST_Buffer, 
                               LL_DMA_DIRECTION_MEMORY_TO_MEMORY);
 
  LL_DMA_SetDataLength(DmaInstance, DmaChannel, BUFFER_SIZE);

  LL_DMA_EnableIT_TC(DmaInstance, DmaChannel);
  LL_DMA_EnableIT_TE(DmaInstance, DmaChannel);
  LL_DMA_EnableChannel(DmaInstance, DmaChannel);
}

/**
  * @brief  DMA conversion complete callback
  * @note   This function is executed when the transfer complete interrupt
  *         is generated
  * @retval None
  */
void TransferComplete(DMA_HandleTypeDef *DmaHandle)
{
  transferCompleteDetected = 1;
}

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

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSI)
  *            SYSCLK(Hz)                     = 64000000
  *            HCLK(Hz)                       = 64000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 2
  *            APB2 Prescaler                 = 1
  *            PLLMUL                         = RCC_PLL_MUL16 (16)
  *            Flash Latency(WS)              = 2
  * @param  None
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  
  /* HSI Oscillator already ON after system reset, activate PLL with HSI as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
  {
    /* Initialization Error */
    while(1); 
  }

  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 
     clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;  
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= HAL_OK)
  {
    /* Initialization Error */
    while(1); 
  }
}
/**
  * @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****/
