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- /* USER CODE BEGIN Header */
- /**
- ******************************************************************************
- * @file : main.c
- * @brief : Main program body
- ******************************************************************************
- * @attention
- *
- * <h2><center>© Copyright (c) 2019 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
- *
- ******************************************************************************
- */
- /* USER CODE END Header */
- /* Includes ------------------------------------------------------------------*/
- #include "main.h"
- #include "stdbool.h"
- /* Private includes ----------------------------------------------------------*/
- /* USER CODE BEGIN Includes */
- /* USER CODE END Includes */
- /* Private typedef -----------------------------------------------------------*/
- /* USER CODE BEGIN PTD */
- /* USER CODE END PTD */
- /* Private define ------------------------------------------------------------*/
- /* USER CODE BEGIN PD */
- /* USER CODE END PD */
- /* Private macro -------------------------------------------------------------*/
- /* USER CODE BEGIN PM */
- /* USER CODE END PM */
- /* Private variables ---------------------------------------------------------*/
- UART_HandleTypeDef huart2;
- /* USER CODE BEGIN PV */
- /**
- * Buffer variables
- */
- enum {
- BUFFER_LENGTH = 256
- };
- char Rx_Buffer[BUFFER_LENGTH];
- char Tx_Buffer[BUFFER_LENGTH];
- uint8_t Rx_head = 0;
- uint8_t Rx_tail = 0;
- uint8_t Tx_head = 0;
- uint8_t Tx_tail = 0;
- /**
- * Frame variables
- */
- uint8_t FRAME_ERROR = 0;
- uint8_t DETECT_FRAME_END = 0;
- uint8_t FRAME_END_DETECTED = 0;
- /* USER CODE END PV */
- /* Private function prototypes -----------------------------------------------*/
- void SystemClock_Config(void);
- static void MX_GPIO_Init(void);
- static void MX_USART2_UART_Init(void);
- void check_frame_end(void);
- uint8_t frame(void);
- uint16_t length(void);
- /* USER CODE BEGIN PFP */
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
- if (huart->Instance == USART2) {
- Rx_head++;
- if (Rx_head >= BUFFER_LENGTH) {
- Rx_head = 0;
- }
- DETECT_FRAME_END = 1;
- if(FRAME_END_DETECTED == 0) {
- HAL_UART_Receive_IT(&huart2, &Rx_Buffer[Rx_head], 1);
- }
- }
- }
- void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
- if (huart->Instance == USART2) {
- Tx_tail++;
- if(Tx_tail != Tx_head) {
- HAL_UART_Transmit_IT(&huart2, &Rx_Buffer[Rx_tail], 1);
- } else {
- HAL_UART_Receive_IT(&huart2, &Rx_Buffer[Rx_head], 1);
- }
- }
- }
- uint16_t length() {
- uint16_t len;
- if (Rx_head > Rx_tail) {
- len = Rx_head - Rx_tail;
- } else {
- len = BUFFER_LENGTH - (Rx_tail - Rx_head);
- }
- return len;
- }
- uint8_t frame() {
- __disable_irq();
- for(uint8_t i=0; i<10; i++) {
- Tx_Buffer[Tx_head] = Rx_Buffer[Rx_tail];
- Tx_head++;
- Rx_tail++;
- }
- __enable_irq();
- if(FRAME_ERROR == 0) {
- HAL_UART_Transmit_IT(&huart2, &Tx_Buffer[Tx_tail], 1);
- }
- }
- void check_frame_end() {
- if (length() >= 10 && Rx_Buffer[Rx_head-1] == 59) {
- FRAME_END_DETECTED = 1;
- frame();
- } else {
- FRAME_END_DETECTED = 0;
- DETECT_FRAME_END = 0;
- }
- }
- /* USER CODE END PFP */
- /* Private user code ---------------------------------------------------------*/
- /* USER CODE BEGIN 0 */
- /* USER CODE END 0 */
- /**
- * @brief The application entry point.
- * @retval int
- */
- int main(void)
- {
- /* USER CODE BEGIN 1 */
- /* USER CODE END 1 */
- /* MCU Configuration--------------------------------------------------------*/
- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
- HAL_Init();
- /* USER CODE BEGIN Init */
- /* USER CODE END Init */
- /* Configure the system clock */
- SystemClock_Config();
- /* USER CODE BEGIN SysInit */
- /* USER CODE END SysInit */
- /* Initialize all configured peripherals */
- MX_GPIO_Init();
- MX_USART2_UART_Init();
- /* USER CODE BEGIN 2 */
- HAL_UART_Receive_IT(&huart2, &Rx_Buffer[Rx_head], 1);
- /* USER CODE END 2 */
- /* Infinite loop */
- /* USER CODE BEGIN WHILE */
- while (1)
- {
- /* USER CODE END WHILE */
- if (DETECT_FRAME_END == 1) {
- check_frame_end();
- }
- /* USER CODE BEGIN 3 */
- }
- /* USER CODE END 3 */
- }
- /**
- * @brief System Clock Configuration
- * @retval None
- */
- void SystemClock_Config(void)
- {
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};
- RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
- /** Initializes the CPU, AHB and APB busses clocks
- */
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
- RCC_OscInitStruct.HSIState = RCC_HSI_ON;
- RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
- RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;
- RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
- if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
- {
- Error_Handler();
- }
- /** Initializes the CPU, AHB and APB busses clocks
- */
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
- |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)
- {
- Error_Handler();
- }
- }
- /**
- * @brief USART2 Initialization Function
- * @param None
- * @retval None
- */
- static void MX_USART2_UART_Init(void)
- {
- /* USER CODE BEGIN USART2_Init 0 */
- /* USER CODE END USART2_Init 0 */
- /* USER CODE BEGIN USART2_Init 1 */
- /* USER CODE END USART2_Init 1 */
- huart2.Instance = USART2;
- huart2.Init.BaudRate = 115200;
- huart2.Init.WordLength = UART_WORDLENGTH_8B;
- huart2.Init.StopBits = UART_STOPBITS_1;
- huart2.Init.Parity = UART_PARITY_NONE;
- huart2.Init.Mode = UART_MODE_TX_RX;
- huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
- huart2.Init.OverSampling = UART_OVERSAMPLING_16;
- if (HAL_UART_Init(&huart2) != HAL_OK)
- {
- Error_Handler();
- }
- /* USER CODE BEGIN USART2_Init 2 */
- /* USER CODE END USART2_Init 2 */
- }
- /**
- * @brief GPIO Initialization Function
- * @param None
- * @retval None
- */
- static void MX_GPIO_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStruct = {0};
- /* GPIO Ports Clock Enable */
- __HAL_RCC_GPIOC_CLK_ENABLE();
- __HAL_RCC_GPIOD_CLK_ENABLE();
- __HAL_RCC_GPIOA_CLK_ENABLE();
- __HAL_RCC_GPIOB_CLK_ENABLE();
- /*Configure GPIO pin Output Level */
- HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
- /*Configure GPIO pin : B1_Pin */
- GPIO_InitStruct.Pin = B1_Pin;
- GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
- GPIO_InitStruct.Pull = GPIO_NOPULL;
- HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
- /*Configure GPIO pin : LD2_Pin */
- GPIO_InitStruct.Pin = LD2_Pin;
- GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
- GPIO_InitStruct.Pull = GPIO_NOPULL;
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
- HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
- /* EXTI interrupt init*/
- HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0);
- HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
- }
- /* USER CODE BEGIN 4 */
- /* USER CODE END 4 */
- /**
- * @brief This function is executed in case of error occurrence.
- * @retval None
- */
- void Error_Handler(void)
- {
- /* USER CODE BEGIN Error_Handler_Debug */
- /* User can add his own implementation to report the HAL error return state */
- /* USER CODE END Error_Handler_Debug */
- }
- #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 CODE BEGIN 6 */
- /* User can add his own implementation to report the file name and line number,
- tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
- /* USER CODE END 6 */
- }
- #endif /* USE_FULL_ASSERT */
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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