嵌入式Linux

/* driver_tim_pwm.h */
#ifndef __DRIVER_TIM_PWM_H
#define __DRIVER_TIM_PWM_H

#include "main.h"

/*
 * 函数名：void TIM_LED3_PWM_Start(void)
 * 输入参数：无
 * 输出参数：无
 * 函数作用：开启定时器
*/
void TIM_LED3_PWM_Start(void);

#endif

/* driver_tim_pwm.c */
#include "driver_tim_pwm.h"
#include "tim.h"

/*
 * 函数名：void TIM_LED3_PWM_Start(void)
 * 输入参数：无
 * 输出参数：无
 * 函数作用：开启定时器
*/
void TIM_LED3_PWM_Start(void)
{
 if(HAL_TIM_Base_Start_IT(&htim2) != HAL_OK)
 {
  Error_Handler();
 }
 HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
}

/*
 * 函数名：void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
 * 输入参数：htim->定时器句柄
 * 输出参数：无
 * 函数作用：每当发生一次周期溢出时间会到此中断回调函数，在此函数内更新占空比
*/
static uint16_t pulse = 0;
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
    if(htim->Instance == TIM2)
    {
     pulse = pulse + 1;
     if(pulse>=1000)
     {
      pulse = 0;
     }
        __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1, pulse);
    }
}

/* main.c */
/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "driver_tim_pwm.h"
/* 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 ---------------------------------------------------------*/

/* 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 */

  if(IS_ENGINEERING_BOOT_MODE())
  {
    /* 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 */
  TIM_LED3_PWM_Start();
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* 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 RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDivValue = RCC_HSI_DIV1;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.PLL2.PLLState = RCC_PLL_NONE;
  RCC_OscInitStruct.PLL3.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL3.PLLSource = RCC_PLL3SOURCE_HSI;
  RCC_OscInitStruct.PLL3.PLLM = 4;
  RCC_OscInitStruct.PLL3.PLLN = 26;
  RCC_OscInitStruct.PLL3.PLLP = 2;
  RCC_OscInitStruct.PLL3.PLLQ = 2;
  RCC_OscInitStruct.PLL3.PLLR = 2;
  RCC_OscInitStruct.PLL3.PLLRGE = RCC_PLL3IFRANGE_1;
  RCC_OscInitStruct.PLL3.PLLFRACV = 1024;
  RCC_OscInitStruct.PLL3.PLLMODE = RCC_PLL_FRACTIONAL;
  RCC_OscInitStruct.PLL4.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** RCC Clock Config
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_ACLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
                              |RCC_CLOCKTYPE_PCLK3|RCC_CLOCKTYPE_PCLK4
                              |RCC_CLOCKTYPE_PCLK5;
  RCC_ClkInitStruct.AXISSInit.AXI_Clock = RCC_AXISSOURCE_HSI;
  RCC_ClkInitStruct.AXISSInit.AXI_Div = RCC_AXI_DIV1;
  RCC_ClkInitStruct.MCUInit.MCU_Clock = RCC_MCUSSOURCE_PLL3;
  RCC_ClkInitStruct.MCUInit.MCU_Div = RCC_MCU_DIV1;
  RCC_ClkInitStruct.APB4_Div = RCC_APB4_DIV1;
  RCC_ClkInitStruct.APB5_Div = RCC_APB5_DIV1;
  RCC_ClkInitStruct.APB1_Div = RCC_APB1_DIV2;
  RCC_ClkInitStruct.APB2_Div = RCC_APB2_DIV2;
  RCC_ClkInitStruct.APB3_Div = RCC_APB3_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct) != 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 */
  __disable_irq();
  while (1)
  {
  }
  /* 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,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */