mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
synced 2025-05-01 22:17:30 +08:00
425 lines
12 KiB
C
425 lines
12 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file : main.c
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* @brief : Main program body
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020 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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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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UART_HandleTypeDef huart3;
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DMA_HandleTypeDef hdma_usart3_rx;
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/* USER CODE BEGIN PV */
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/**
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* @brief Text strings printed on PC Com port for user information
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*/
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uint8_t aTextInfoStart[] = "\r\nUSART Example : Enter characters to fill reception buffers.\r\n";
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uint8_t aRXBufferUser[RX_BUFFER_SIZE];
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/**
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* @brief Data buffers used to manage received data in interrupt routine
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*/
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uint8_t aRXBufferA[RX_BUFFER_SIZE];
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uint8_t aRXBufferB[RX_BUFFER_SIZE];
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__IO uint32_t uwNbReceivedChars;
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uint8_t *pBufferReadyForUser;
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uint8_t *pBufferReadyForReception;
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void MX_GPIO_Init(void);
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static void MX_DMA_Init(void);
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static void MX_USART3_UART_Init(void);
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/* USER CODE BEGIN PFP */
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void PrintInfo(UART_HandleTypeDef *huart, uint8_t *String, uint16_t Size);
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void StartReception(void);
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void UserDataTreatment(UART_HandleTypeDef *huart, uint8_t* pData, uint16_t Size);
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_DMA_Init();
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MX_USART3_UART_Init();
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/* USER CODE BEGIN 2 */
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/* Initiate Continuous reception */
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StartReception();
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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__HAL_RCC_PWR_CLK_ENABLE();
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/** Initializes the RCC Oscillators according to the specified parameters
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* in the RCC_OscInitTypeDef structure.
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
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RCC_OscInitStruct.HSIState = RCC_HSI_ON;
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RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 180;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 4;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Activate the Over-Drive mode
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*/
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if (HAL_PWREx_EnableOverDrive() != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|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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Error_Handler();
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}
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}
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/**
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* @brief USART3 Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_USART3_UART_Init(void)
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{
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/* USER CODE BEGIN USART3_Init 0 */
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/* USER CODE END USART3_Init 0 */
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/* USER CODE BEGIN USART3_Init 1 */
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/* USER CODE END USART3_Init 1 */
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huart3.Instance = USART3;
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huart3.Init.BaudRate = 115200;
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huart3.Init.WordLength = UART_WORDLENGTH_8B;
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huart3.Init.StopBits = UART_STOPBITS_1;
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huart3.Init.Parity = UART_PARITY_NONE;
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huart3.Init.Mode = UART_MODE_TX_RX;
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huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart3.Init.OverSampling = UART_OVERSAMPLING_16;
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if (HAL_UART_Init(&huart3) != HAL_OK)
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{
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Error_Handler();
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}
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/* USER CODE BEGIN USART3_Init 2 */
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/* USER CODE END USART3_Init 2 */
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}
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/**
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* Enable DMA controller clock
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*/
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static void MX_DMA_Init(void)
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{
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/* DMA controller clock enable */
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__HAL_RCC_DMA1_CLK_ENABLE();
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/* DMA interrupt init */
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/* DMA1_Stream1_IRQn interrupt configuration */
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HAL_NVIC_SetPriority(DMA1_Stream1_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(DMA1_Stream1_IRQn);
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}
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/**
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* @brief GPIO Initialization Function
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* @param None
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* @retval None
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*/
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static void MX_GPIO_Init(void)
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{
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOD_CLK_ENABLE();
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}
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/* USER CODE BEGIN 4 */
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/**
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* @brief Send Txt information message on UART Tx line (to PC Com port).
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* @param huart UART handle.
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* @param String String to be sent to user display
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* @param Size Size of string
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* @retval None
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*/
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void PrintInfo(UART_HandleTypeDef *huart, uint8_t *String, uint16_t Size)
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{
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if (HAL_OK != HAL_UART_Transmit(huart, String, Size, 100))
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{
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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 prints user info on PC com port and initiates RX transfer
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* @retval None
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*/
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void StartReception(void)
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{
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/* Initializes Buffer swap mechanism (used in User callback) :
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- 2 physical buffers aRXBufferA and aRXBufferB (RX_BUFFER_SIZE length)
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*/
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pBufferReadyForReception = aRXBufferA;
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pBufferReadyForUser = aRXBufferB;
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uwNbReceivedChars = 0;
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/* Print user info on PC com port */
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PrintInfo(&huart3, aTextInfoStart, COUNTOF(aTextInfoStart));
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/* Initializes Rx sequence using Reception To Idle event API.
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As DMA channel associated to UART Rx is configured as Circular,
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reception is endless.
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If reception has to be stopped, call to HAL_UART_AbortReceive() could be used.
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Use of HAL_UARTEx_ReceiveToIdle_DMA service, will generate calls to
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user defined HAL_UARTEx_RxEventCallback callback for each occurrence of
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following events :
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- DMA RX Half Transfer event (HT)
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- DMA RX Transfer Complete event (TC)
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- IDLE event on UART Rx line (indicating a pause is UART reception flow)
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*/
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if (HAL_OK != HAL_UARTEx_ReceiveToIdle_DMA(&huart3, aRXBufferUser, RX_BUFFER_SIZE))
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{
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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 handles buffer containing received data on PC com port
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* @note In this example, received data are sent back on UART Tx (loopback)
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* Any other processing such as copying received data in a larger buffer to make it
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* available for application, could be implemented here.
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* @note This routine is executed in Interrupt context.
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* @param huart UART handle.
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* @param pData Pointer on received data buffer to be processed
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* @retval Size Nb of received characters available in buffer
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*/
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void UserDataTreatment(UART_HandleTypeDef *huart, uint8_t* pData, uint16_t Size)
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{
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/*
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* This function might be called in any of the following interrupt contexts :
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* - DMA TC and HT events
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* - UART IDLE line event
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*
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* pData and Size defines the buffer where received data have been copied, in order to be processed.
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* During this processing of already received data, reception is still ongoing.
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*
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*/
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uint8_t* pBuff = pData;
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uint8_t i;
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/* Implementation of loopback is on purpose implemented in direct register access,
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in order to be able to echo received characters as fast as they are received.
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Wait for TC flag to be raised at end of transmit is then removed, only TXE is checked */
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for (i = 0; i < Size; i++)
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{
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while (!(__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE))) {}
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huart->Instance->DR = *pBuff;
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pBuff++;
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}
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}
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/**
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* @brief User implementation of the Reception Event Callback
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* (Rx event notification called after use of advanced reception service).
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* @param huart UART handle
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* @param Size Number of data available in application reception buffer (indicates a position in
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* reception buffer until which, data are available)
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* @retval None
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*/
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void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
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{
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static uint8_t old_pos = 0;
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uint8_t *ptemp;
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uint8_t i;
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/* Check if number of received data in recpetion buffer has changed */
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if (Size != old_pos)
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{
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/* Check if position of index in reception buffer has simply be increased
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of if end of buffer has been reached */
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if (Size > old_pos)
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{
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/* Current position is higher than previous one */
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uwNbReceivedChars = Size - old_pos;
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/* Copy received data in "User" buffer for evacuation */
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for (i = 0; i < uwNbReceivedChars; i++)
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{
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pBufferReadyForUser[i] = aRXBufferUser[old_pos + i];
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}
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}
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else
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{
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/* Current position is lower than previous one : end of buffer has been reached */
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/* First copy data from current position till end of buffer */
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uwNbReceivedChars = RX_BUFFER_SIZE - old_pos;
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/* Copy received data in "User" buffer for evacuation */
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for (i = 0; i < uwNbReceivedChars; i++)
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{
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pBufferReadyForUser[i] = aRXBufferUser[old_pos + i];
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}
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/* Check and continue with beginning of buffer */
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if (Size > 0)
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{
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for (i = 0; i < Size; i++)
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{
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pBufferReadyForUser[uwNbReceivedChars + i] = aRXBufferUser[i];
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}
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uwNbReceivedChars += Size;
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}
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}
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/* Process received data that has been extracted from Rx User buffer */
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UserDataTreatment(huart, pBufferReadyForUser, uwNbReceivedChars);
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/* Swap buffers for next bytes to be processed */
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ptemp = pBufferReadyForUser;
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pBufferReadyForUser = pBufferReadyForReception;
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pBufferReadyForReception = ptemp;
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}
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/* Update old_pos as new reference of position in User Rx buffer that
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indicates position to which data have been processed */
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old_pos = Size;
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* User can add his own implementation to report the HAL error return state */
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while (1)
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{
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/* Toggle LED2 for error */
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BSP_LED_Toggle(LED2);
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HAL_Delay(500);
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}
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/* USER CODE END Error_Handler_Debug */
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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 CODE BEGIN 6 */
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/* User can add his own implementation to report the file name and line number,
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tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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