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【STM32】CubeMX+HAL 输出 PWM

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AXYZdong
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发布于: 2021 年 02 月 21 日
【STM32】CubeMX+HAL 输出PWM

Author：AXYZdong

自动化专业 工科男

有一点思考，有一点想法，有一点理性！

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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****/
复制代码

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****/
复制代码

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 %d\r\n", file, line) */  /* USER CODE END 6 */}#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
复制代码

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


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本次的分享就到这里

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发布于: 2021 年 02 月 21 日阅读数: 28

版权声明: 本文为 InfoQ 作者【AXYZdong】的原创文章。

原文链接:【http://xie.infoq.cn/article/87f2c3a5ad84905df1d0de7fb】。文章转载请联系作者。

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自动化专业 工科男 有一点思考，有一点想法，有一点理性。 定个小小目标，努力成为习惯。

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【STM32】CubeMX+HAL 输出PWM