开发板：STM32h743xi

编程软件：Keil

项目：GPIO外设操作（彩色LED灯）

学习打卡：Day2

学习地址：【野火】STM32 HAL库开发实战指南 教学视频 手把手教学STM32全系列 零基础入门CubeMX+HAL库，基于野火全系列STM32开发板

一、STM32h743xi上LED灯的原理图

 从上图我们可以看出

1. LED_R是通过PB0口调节的
2. LED_G是通过PB1口调节的
3. LED_B是通过PA3口调节的

三、创建所需框架（空白文件夹/文件）

1. User文件夹
2. LED文件夹
3. bsp_led.c
4. bsp_led.h

四、添加引用

将User文件夹引入进来 

五、 代码及注释 

 对于led灯的操作无非就是对gpio进行操作，所以需要查看hal库的gpio文件进行并使用

找到这段如何去使用gpio外设的说明，其中有详细的配置介绍，再次不过多介绍了 

小技巧：可以使用F12进行快速查看函数 

•  bsp_led.c

#include "./LED/bsp_led.h"

void LED_GPIO_Init(void)
{
  GPIO_InitTypeDef LED_GPIO_Init;
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  LED_GPIO_Init.Mode   = GPIO_MODE_OUTPUT_PP;
  LED_GPIO_Init.Speed  = GPIO_SPEED_FREQ_LOW;
  LED_GPIO_Init.Pin    = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_3;
  LED_GPIO_Init.Pull   = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOB,&LED_GPIO_Init);
  HAL_GPIO_Init(GPIOA,&LED_GPIO_Init);
}  

• bsp_led.h 

这里传参记得大写哈 

#ifndef _BSP_LED_H_
#define _BSP_LED_H_
#include "stm32h7xx_hal.h"
#include "stm32h7xx_hal_gpio.h"

// 对于单一的要求，可以使用宏定义进行操作
// 红灯操作
// 点亮
# define LED_R_ON do{HAL_GPIO_WritePin(GPIOB,GPIO_PIN_0,GPIO_PIN_RESET);}while(0)
// 熄灭
# define LED_R_OFF do{HAL_GPIO_WritePin(GPIOB,GPIO_PIN_0,GPIO_PIN_SET);}while(0)
// 翻转
# define LED_R_Toggle HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_0);

// 绿灯操作
// 点亮
# define LED_G_ON do{HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_RESET);}while(0)
// 熄灭
# define LED_G_OFF do{HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_SET);}while(0)
// 翻转
# define LED_G_Toggle do{HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_1);}while(0)

// 蓝灯操作
// 点亮
# define LED_B_ON do{HAL_GPIO_WritePin(GPIOA,GPIO_PIN_3,GPIO_PIN_RESET);}while(0)
// 熄灭
# define LED_B_OFF do{HAL_GPIO_WritePin(GPIOA,GPIO_PIN_3,GPIO_PIN_SET);}while(0)
// 翻转
# define LED_B_Toggle do{HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_3);}while(0)
//初始化GPIO
void LED_GPIO_Init(void);

#endif

• main.c 

 

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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 "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "./LED/bsp_led.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 */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  /* USER CODE BEGIN 2 */
  LED_GPIO_Init();
  /* USER CODE END 2 */
  
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
    LED_R_ON;
    HAL_Delay(500);
    LED_R_OFF;
    LED_G_ON;
    HAL_Delay(500);
    LED_G_OFF;
    LED_B_ON;
    HAL_Delay(500);
    LED_B_OFF;
    /* 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};

  /** Supply configuration update enable
  */
  HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);

  while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
  /** 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_DIV1;
  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 buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
                              |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV1;
  RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != 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 */

 六、运行结果

结果为：红绿蓝流水灯，闪烁间隔为500ms