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/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" #include<stdio.h> #include<string.h> #include<stm32h7xx.h> /* Private variables ---------------------------------------------------------*/ TIM_HandleTypeDef htim6; UART_HandleTypeDef huart3; /* USER CODE BEGIN PV */ uint8_t redLedOnMsg[] = "Red LED is ON for 7 seconds\r\n"; uint8_t yellowLedOnMsg[] = "Yellow LED is ON for 5 seconds\r\n"; uint8_t greenLedOnMsg[] = "Green LED is ON for 3 seconds\r\n"; uint8_t ledOffMsg[] = "LED is OFF\r\n"; uint8_t buffer[50]; int ledState = 0; // 0: Red, 1: Yellow, 2: Green, 3: Off /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_USART3_UART_Init(void); static void MX_TIM6_Init(void); /* USER CODE BEGIN 0 */ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) { if(htim == &htim6) { switch(ledState) { case 0: // Red LED HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET); // Red LED ON HAL_UART_Transmit(&huart3, redLedOnMsg, sizeof(redLedOnMsg), HAL_MAX_DELAY); ledState = 1; break; case 1: // Yellow LED HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET); // Red LED OFF HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_SET); // Yellow LED ON HAL_UART_Transmit(&huart3, yellowLedOnMsg, sizeof(yellowLedOnMsg), HAL_MAX_DELAY); ledState = 2; break; case 2: // Green LED HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_RESET); // Yellow LED OFF HAL_GPIO_WritePin(GPIOE, GPIO_PIN_1, GPIO_PIN_SET); // Green LED ON HAL_UART_Transmit(&huart3, greenLedOnMsg, sizeof(greenLedOnMsg), HAL_MAX_DELAY); ledState = 3; break; case 3: // Turn all off HAL_GPIO_WritePin(GPIOE, GPIO_PIN_1, GPIO_PIN_RESET); // Green LED OFF HAL_UART_Transmit(&huart3, ledOffMsg, sizeof(ledOffMsg), HAL_MAX_DELAY); ledState = 0; break; } } } /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ HAL_Init(); SystemClock_Config(); MX_GPIO_Init(); MX_USART3_UART_Init(); MX_TIM6_Init(); /* USER CODE BEGIN 2 */ HAL_TIM_Base_Start_IT(&htim6); // Start Timer 6 with Interrupts /* USER CODE END 2 */ while (1) { // Main loop does nothing, Timer interrupt handles LED blinking } } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { // Same clock configuration as your reference code } /** * @brief TIM6 Initialization Function * @param None * @retval None */ static void MX_TIM6_Init(void) { TIM_MasterConfigTypeDef sMasterConfig = {0}; htim6.Instance = TIM6; htim6.Init.Prescaler = 40000; htim6.Init.CounterMode = TIM_COUNTERMODE_UP; htim6.Init.Period = 7000; // 7 seconds for the red LED htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; if (HAL_TIM_Base_Init(&htim6) != HAL_OK) { Error_Handler(); } sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK) { Error_Handler(); } } /** * @brief USART3 Initialization Function * @param None * @retval None */ static void MX_USART3_UART_Init(void) { // Same UART configuration as your reference code } /** * @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_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOE_CLK_ENABLE(); /* Configure GPIO pin Output Level */ HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET); // Red LED HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_RESET); // Yellow LED HAL_GPIO_WritePin(GPIOE, GPIO_PIN_1, GPIO_PIN_RESET); // Green LED /*Configure GPIO pin : PA5 */ GPIO_InitStruct.Pin = GPIO_PIN_5; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /*Configure GPIO pin : PB14 */ GPIO_InitStruct.Pin = GPIO_PIN_14; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); /*Configure GPIO pin : PE1 */ GPIO_InitStruct.Pin = GPIO_PIN_1; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOE, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ void Error_Handler(void) { // Same error handler as your reference code } #ifdef USE_FULL_ASSERT void assert_failed(uint8_t *file, uint32_t line) { // Same assert_failed as your reference code } #endif /* USE_FULL_ASSERT */
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