板级支持包构建2
开发板：STM32h743xi
编程软件：Keil
项目：GPIO外设操作（按键扫描）
学习打卡：Day3
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上按键的原理图
从上图我们可以看出
- 按键1是通过PA0口调节，且按下是高电平，未按下是低电平
- 按键2是通过PC13口调节，且按下是高电平，未按下是低电平
三、创建所需框架（空白文件夹/文件）
- User文件夹
- LED文件夹
- bsp_key.c
- bsp_key.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_key.c
#include "./KEY/bsp_key.h"void KEY_GPIO_Init(void)
{GPIO_InitTypeDef KEY_GPIO_Init;__HAL_RCC_GPIOA_CLK_ENABLE();__HAL_RCC_GPIOC_CLK_ENABLE();KEY_GPIO_Init.Pin = GPIO_PIN_0;KEY_GPIO_Init.Mode = GPIO_MODE_INPUT;KEY_GPIO_Init.Speed = GPIO_SPEED_FREQ_LOW;KEY_GPIO_Init.Pull = GPIO_NOPULL;HAL_GPIO_Init(GPIOA,&KEY_GPIO_Init);KEY_GPIO_Init.Pin = GPIO_PIN_13;HAL_GPIO_Init(GPIOC,&KEY_GPIO_Init);
}
uint8_t Key_Scan(GPIO_TypeDef* GPIOx,uint16_t GPIO_Pin)
{/* 按键按下 */if(HAL_GPIO_ReadPin(GPIOx,GPIO_Pin) == GPIO_PIN_SET){while(HAL_GPIO_ReadPin(GPIOx,GPIO_Pin) == GPIO_PIN_SET);return KEY_ON;}else{return KEY_OFF;}}
- bsp_key.h
这里传参记得大写哈
#ifndef _BSP_KEY_H_
#define _BSP_KEY_H_
#include "stm32h7xx_hal.h"
#include "stm32h7xx_hal_gpio.h"
# define KEY_ON 1
# define KEY_OFF 0void KEY_GPIO_Init(void);uint8_t Key_Scan(GPIO_TypeDef* GPIOx,uint16_t GPIO_Pin);#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"
#include "./KEY/bsp_key.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();KEY_GPIO_Init();/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE */if(Key_Scan(GPIOA,GPIO_PIN_0)==KEY_ON){LED_B_Toggle;}if(Key_Scan(GPIOC,GPIO_PIN_13)==KEY_ON){LED_G_Toggle;}/* 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：反转电平