【STM32】CubeMX+HAL 输出PWMAXYZdong的博客-sconfigoc.ocmode = timocmodepwm1; sconfigoc.puls

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1. 配置STM32CubeMX

前面的一些基础步骤可参见：【STM32】CubeMX+HAL 点亮LED 的【1.1】~【1.6】步骤。

核心配置：

这里我使用的是 TIM2 定时器，当然使用其他的也可以，但要注意相关配置。

1.1 TIM2 的 Mode 配置

1.2 TIM2 的 Configuration 配置

1.3 其余 GPIO 配置

PA2 的 PWM 输出作为 PA6 的输入，PA6 连接的是一个 LED ，观察是否出现呼吸灯现象。

余下步骤可参见：【STM32】CubeMX+HAL 点亮LED 的【1.10】~【1.13】步骤。

2. 添加代码

下面贴出主要代码：

2.1 gpio.c

/**   ******************************************************************************   * File Name          : gpio.c   * Description        : This file provides code for the configuration   *                      of all used GPIO pins.   ******************************************************************************   * @attention   *   * <h2><center>&copy; Copyright (c) 2020 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 "gpio.h" /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ /*----------------------------------------------------------------------------*/ /* Configure GPIO                                                             */ /*----------------------------------------------------------------------------*/ /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /** Configure pins as          * Analog          * Input          * Output         * EVENT_OUT         * EXTI */ void MX_GPIO_Init(void) {    GPIO_InitTypeDef GPIO_InitStruct = {0}; /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOH_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /*Configure GPIO pin : PA6 */   GPIO_InitStruct.Pin = GPIO_PIN_6;   GPIO_InitStruct.Mode = GPIO_MODE_INPUT;   GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } /* USER CODE BEGIN 2 */ /* USER CODE END 2 */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 

2.2 time.c

/**   ******************************************************************************   * File Name          : TIM.c   * Description        : This file provides code for the configuration   *                      of the TIM instances.   ******************************************************************************   * @attention   *   * <h2><center>&copy; Copyright (c) 2020 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 "tim.h" /* USER CODE BEGIN 0 */ /* USER CODE END 0 */  TIM_HandleTypeDef htim2; /* TIM2 init function */ void MX_TIM2_Init(void) {   TIM_ClockConfigTypeDef sClockSourceConfig = {0};   TIM_MasterConfigTypeDef sMasterConfig = {0};   TIM_OC_InitTypeDef sConfigOC = {0};    htim2.Instance = TIM2;   htim2.Init.Prescaler = 80-1;   htim2.Init.CounterMode = TIM_COUNTERMODE_UP;   htim2.Init.Period = 100;   htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;   htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; if (HAL_TIM_Base_Init(&htim2) != HAL_OK) { Error_Handler(); }   sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK) { Error_Handler(); } if (HAL_TIM_PWM_Init(&htim2) != HAL_OK) { Error_Handler(); }   sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;   sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK) { Error_Handler(); }   sConfigOC.OCMode = TIM_OCMODE_PWM1;   sConfigOC.Pulse = 0;   sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;   sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3) != HAL_OK) { Error_Handler(); } HAL_TIM_MspPostInit(&htim2); } void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle) { if(tim_baseHandle->Instance==TIM2) { /* USER CODE BEGIN TIM2_MspInit 0 */ /* USER CODE END TIM2_MspInit 0 */ /* TIM2 clock enable */ __HAL_RCC_TIM2_CLK_ENABLE(); /* USER CODE BEGIN TIM2_MspInit 1 */ /* USER CODE END TIM2_MspInit 1 */ } } void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle) {    GPIO_InitTypeDef GPIO_InitStruct = {0}; if(timHandle->Instance==TIM2) { /* USER CODE BEGIN TIM2_MspPostInit 0 */ /* USER CODE END TIM2_MspPostInit 0 */ __HAL_RCC_GPIOA_CLK_ENABLE(); /**TIM2 GPIO Configuration         PA2     ------> TIM2_CH3      */     GPIO_InitStruct.Pin = GPIO_PIN_2;     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;     GPIO_InitStruct.Pull = GPIO_NOPULL;     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;     GPIO_InitStruct.Alternate = GPIO_AF1_TIM2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* USER CODE BEGIN TIM2_MspPostInit 1 */ /* USER CODE END TIM2_MspPostInit 1 */ } } void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle) { if(tim_baseHandle->Instance==TIM2) { /* USER CODE BEGIN TIM2_MspDeInit 0 */ /* USER CODE END TIM2_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_TIM2_CLK_DISABLE(); /* USER CODE BEGIN TIM2_MspDeInit 1 */ /* USER CODE END TIM2_MspDeInit 1 */ } } /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 

2.3 main.c

/* USER CODE BEGIN Header */ /**   ******************************************************************************   * @file           : main.c   * @brief          : Main program body   ******************************************************************************   * @attention   *   * <h2><center>&copy; Copyright (c) 2020 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 "tim.h" #include "gpio.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 ---------------------------------------------------------*/ static unsigned char counter=0; static unsigned char flag=0; /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* 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_TIM2_Init(); /* USER CODE BEGIN 2 */ HAL_TIM_Base_Start(&htim2); HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_3); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ if(counter==0)    flag=0; else if(counter==100)    flag=1; if(flag)    counter--; else    counter++;   TIM2->CCR3=counter; HAL_Delay(10); /* 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}; /** Configure the main internal regulator output voltage    */ __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /** 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_NONE; 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_HSI;   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) { Error_Handler(); } } /* 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 %drn", file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 

3. 总结

• TIM 的配置是本工程的核心
• 通过观察 LED 判断是否输出成功，当然有条件的可以使用 示波器 看看波形
• STM32 的基础配置用 CubeMX 很是方便

  本次的就到这里

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