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
- LED_R是通过PB0口调节的
- LED_G是通过PB1口调节的
- LED_B是通过PA3口调节的
三、创建所需框架（空白文件夹/文件）
- User文件夹
- LED文件夹
- bsp_led.c
- 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