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基于STM32的数字频率计设计

news 2025/6/30 7:40:36

基于STM32的数字频率计设计

（仿真＋程序＋设计报告）

功能介绍

具体功能：

1.信号发生器产生信号经过LM324处理给单片机；

2.单片机处理完通过串口显示频率；

3.测量频率范围0-1kHz，误差在1%以内；

添加图片注释，不超过 140 字（可选）

程序

/* 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 "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "delay.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
uint32_t pluseCount = 0;
uint16_t freq = 0;
/* 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 *///	uint16_t bLEDLight = 0;/* 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();				//IO口初始化MX_USART1_UART_Init();//串口初始化MX_TIM2_Init();				//定时器初始化/* USER CODE BEGIN 2 */HAL_TIM_Base_Start_IT(&htim2);
//char str[20];/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */HAL_Delay(500);printf("频率：%dHz\r\n",freq);
//      HAL_Delay(200);
//      sprintf(str,"周期%f",1.0/freq);
//      printf("%s",str);}/* 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_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;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_DIV16;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;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 */
******//完整资料
********//木子单片机
/*** @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****/
/********************************************************************************* File Name          : TIM.c* Description        : This file provides code for the configuration*                      of the TIM instances.******************************************************************************* @attention** <h2><center>&copy; Copyright (c) 2021 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 */
#include "stdio.h"
/* USER CODE END 0 */TIM_HandleTypeDef htim2;/* TIM2 init function */
void MX_TIM2_Init(void)
{TIM_ClockConfigTypeDef sClockSourceConfig = {0};TIM_MasterConfigTypeDef sMasterConfig = {0};htim2.Instance = TIM2;htim2.Init.Prescaler = 0;htim2.Init.CounterMode = TIM_COUNTERMODE_UP;htim2.Init.Period = 1000-1;htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;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();}sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK){Error_Handler();}}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();/* TIM2 interrupt Init */HAL_NVIC_SetPriority(TIM2_IRQn, 1, 0);HAL_NVIC_EnableIRQ(TIM2_IRQn);/* USER CODE BEGIN TIM2_MspInit 1 *//* USER CODE END TIM2_MspInit 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();/* TIM2 interrupt Deinit */HAL_NVIC_DisableIRQ(TIM2_IRQn);/* USER CODE BEGIN TIM2_MspDeInit 1 *//* USER CODE END TIM2_MspDeInit 1 */}
}/* USER CODE BEGIN 1 */
uint16_t exitTimes = 0;
//每1ms进入一次定时器中断
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{if (htim == (&htim2)){exitTimes++;if(exitTimes > 500)//计算500ms的脉冲的下降沿，结果×2得到波形频率{freq = pluseCount * 2;pluseCount = 0;exitTimes = 0;}}
}
/* USER CODE END 1 *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

硬件设计

使用元器件：

单片机：STM32F103；