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最新推荐文章于 2025-08-14 13:36:41 发布

原创最新推荐文章于 2025-08-14 13:36:41 发布 · 66 阅读

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#单片机

博客介绍了单片机实现流水灯的两种方法。一是用定时器实现，需配置cubemx文件，替换main.c代码；二是用PWM波形实现，同样要配置cubemx，生成工程文件后添加记录占空比、激活PWM波形及呼吸灯代码，烧录运行。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

定时器实现流水灯

1：配置cubemx
按照如下步骤配置cubemx文件
在这里插入图片描述

用如下代码代替main.c中的代码即可实现信息接收与流水灯。

// /* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2022 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 "usart.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 ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_NVIC_Init(void);


/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  HAL_Init();

  SystemClock_Config();


  MX_GPIO_Init();
  MX_TIM2_Init();
  MX_USART1_UART_Init();


  MX_NVIC_Init();

	HAL_TIM_Base_Start_IT(&htim2);			

  while (1)
  {

  }

}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};


  */
  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_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }


  */
  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_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief NVIC Configuration.
  * @retval None
  */
static void MX_NVIC_Init(void)
{
/
  HAL_NVIC_SetPriority(TIM2_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(TIM2_IRQn);
}

/* USER CODE BEGIN 4 */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
	static uint32_t time_cnt =0;
  static uint32_t time_cnt1 =0;
	char data[]="hello windows!\n";
	if(htim->Instance == TIM2)
	{
		//????
		if(++time_cnt1==80&&++time_cnt1 <96)
			{	
			HAL_UART_Transmit(&huart1, (uint8_t *)data, 15, 0xffff);
				time_cnt1=0;
			}
		//LED??????????	
		if(++time_cnt >= 160&&++time_cnt <320)
		{
		HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET);//PA5??
		HAL_GPIO_WritePin(GPIOB,GPIO_PIN_9,GPIO_PIN_SET);//PB9??
		HAL_GPIO_WritePin(GPIOC,GPIO_PIN_14,GPIO_PIN_SET);//PC14??
		}
		if(++time_cnt >= 320&&++time_cnt <480)
		{
		HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET);//PA5??
		HAL_GPIO_WritePin(GPIOB,GPIO_PIN_9,GPIO_PIN_RESET);//PB9??
		HAL_GPIO_WritePin(GPIOC,GPIO_PIN_14,GPIO_PIN_SET);//PC14??
    }
			if(++time_cnt >= 480&&++time_cnt <640)
			{
		HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET);//PA5??
		HAL_GPIO_WritePin(GPIOB,GPIO_PIN_9,GPIO_PIN_SET);//PB9??
		HAL_GPIO_WritePin(GPIOC,GPIO_PIN_14,GPIO_PIN_RESET);//PC14??

		}
		if(++time_cnt >= 640)
		{
			time_cnt =0;
			  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_14, GPIO_PIN_SET);


        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);


        HAL_GPIO_WritePin(GPIOB, GPIO_PIN_9, GPIO_PIN_SET);
		}
	}

}


/**
  * @brief 
  * @retval None
  */
void Error_Handler(void)
{

  __disable_irq();
  while (1)
  {
  }

}

#ifdef  USE_FULL_ASSERT

void assert_failed(uint8_t *file, uint32_t line)
{

}
#endif 


;