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https://github.com/STMicroelectronics/STM32CubeF4.git
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314 lines
11 KiB
C
314 lines
11 KiB
C
/**
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******************************************************************************
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* @file DMA/DMA_FLASHToRAM/Src/main.c
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* @author MCD Application Team
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* @brief This example provides a description of how to use a DMA channel
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* to transfer a word data buffer from FLASH memory to embedded
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* SRAM memory through the STM32F4xx HAL API.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F4xx_HAL_Examples
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* @{
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*/
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/** @addtogroup DMA_FLASHToRAM
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* DMA Handle declaration */
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DMA_HandleTypeDef DmaHandle;
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static const uint32_t aSRC_Const_Buffer[BUFFER_SIZE] =
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{
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0x01020304, 0x05060708, 0x090A0B0C, 0x0D0E0F10,
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0x11121314, 0x15161718, 0x191A1B1C, 0x1D1E1F20,
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0x21222324, 0x25262728, 0x292A2B2C, 0x2D2E2F30,
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0x31323334, 0x35363738, 0x393A3B3C, 0x3D3E3F40,
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0x41424344, 0x45464748, 0x494A4B4C, 0x4D4E4F50,
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0x51525354, 0x55565758, 0x595A5B5C, 0x5D5E5F60,
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0x61626364, 0x65666768, 0x696A6B6C, 0x6D6E6F70,
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0x71727374, 0x75767778, 0x797A7B7C, 0x7D7E7F80
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};
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static uint32_t aDST_Buffer[BUFFER_SIZE];
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static __IO uint32_t transferErrorDetected; /* Set to 1 if an error transfer is detected */
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static __IO uint32_t transferCompleteDetected; /* Set to 1 if transfer is correctly completed */
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/* Private function prototypes -----------------------------------------------*/
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static void DMA_Config(void);
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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static void TransferComplete(DMA_HandleTypeDef *DmaHandle);
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static void TransferError(DMA_HandleTypeDef *DmaHandle);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F4xx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 180 MHz */
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SystemClock_Config();
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/* Initialize LEDs */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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/* Set to 1 if an transfer error is detected */
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transferErrorDetected = 0;
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transferCompleteDetected = 0;
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/* Configure and enable the DMA stream for Memory to Memory transfer */
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DMA_Config();
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/* Infinite loop */
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while (1)
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{
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if (transferErrorDetected == 1)
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{
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/* Turn LED2 on*/
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BSP_LED_On(LED2);
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transferErrorDetected = 0;
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}
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if (transferCompleteDetected == 1)
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{
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/* Turn LED1 on*/
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BSP_LED_On(LED1);
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transferCompleteDetected = 0;
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}
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}
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}
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/**
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* @brief Configure the DMA controller according to the Stream parameters
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* defined in main.h file
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* @note This function is used to :
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* -1- Enable DMA2 clock
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* -2- Select the DMA functional Parameters
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* -3- Select the DMA instance to be used for the transfer
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* -4- Select Callbacks functions called after Transfer complete and
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Transfer error interrupt detection
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* -5- Initialize the DMA stream
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* -6- Configure NVIC for DMA transfer complete/error interrupts
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* -7- Start the DMA transfer using the interrupt mode
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* @param None
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* @retval None
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*/
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static void DMA_Config(void)
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{
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/*## -1- Enable DMA2 clock #################################################*/
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__HAL_RCC_DMA2_CLK_ENABLE();
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/*##-2- Select the DMA functional Parameters ###############################*/
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DmaHandle.Init.Channel = DMA_CHANNEL; /* DMA_CHANNEL_0 */
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DmaHandle.Init.Direction = DMA_MEMORY_TO_MEMORY; /* M2M transfer mode */
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DmaHandle.Init.PeriphInc = DMA_PINC_ENABLE; /* Peripheral increment mode Enable */
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DmaHandle.Init.MemInc = DMA_MINC_ENABLE; /* Memory increment mode Enable */
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DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; /* Peripheral data alignment : Word */
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DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; /* memory data alignment : Word */
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DmaHandle.Init.Mode = DMA_NORMAL; /* Normal DMA mode */
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DmaHandle.Init.Priority = DMA_PRIORITY_HIGH; /* priority level : high */
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DmaHandle.Init.FIFOMode = DMA_FIFOMODE_ENABLE; /* FIFO mode enabled */
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DmaHandle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_1QUARTERFULL; /* FIFO threshold: 1/4 full */
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DmaHandle.Init.MemBurst = DMA_MBURST_SINGLE; /* Memory burst */
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DmaHandle.Init.PeriphBurst = DMA_PBURST_SINGLE; /* Peripheral burst */
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/*##-3- Select the DMA instance to be used for the transfer : DMA2_Stream0 #*/
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DmaHandle.Instance = DMA_INSTANCE;
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/*##-4- Initialize the DMA stream ##########################################*/
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if(HAL_DMA_Init(&DmaHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-5- Select Callbacks functions called after Transfer complete and Transfer error */
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HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_CPLT_CB_ID, TransferComplete);
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HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_ERROR_CB_ID, TransferError);
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/*##-6- Configure NVIC for DMA transfer complete/error interrupts ##########*/
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/* Set Interrupt Group Priority */
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HAL_NVIC_SetPriority(DMA_INSTANCE_IRQ, 0, 0);
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/* Enable the DMA STREAM global Interrupt */
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HAL_NVIC_EnableIRQ(DMA_INSTANCE_IRQ);
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/*##-7- Start the DMA transfer using the interrupt mode ####################*/
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/* Configure the source, destination and buffer size DMA fields and Start DMA Stream transfer */
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/* Enable All the DMA interrupts */
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if (HAL_DMA_Start_IT(&DmaHandle, (uint32_t)&aSRC_Const_Buffer, (uint32_t)&aDST_Buffer, BUFFER_SIZE) != HAL_OK)
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{
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/* Transfer Error */
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Error_Handler();
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}
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}
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/**
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* @brief DMA conversion complete callback
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* @note This function is executed when the transfer complete interrupt
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* is generated
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* @retval None
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*/
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static void TransferComplete(DMA_HandleTypeDef *DmaHandle)
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{
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transferCompleteDetected = 1;
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}
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/**
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* @brief DMA conversion error callback
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* @note This function is executed when the transfer error interrupt
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* is generated during DMA transfer
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* @retval None
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*/
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static void TransferError(DMA_HandleTypeDef *DmaHandle)
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{
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transferErrorDetected = 1;
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 180000000
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* HCLK(Hz) = 180000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 8000000
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* PLL_M = 8
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* PLL_N = 360
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* PLL_P = 2
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* PLL_Q = 7
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 5
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 360;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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if(HAL_PWREx_EnableOverDrive() != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED3 on: Transfer Error */
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BSP_LED_On(LED3);
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while (1)
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{
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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