HAL库笔记——通过按键来控制LED（基于正点原子STM32F103ZET6精英板）

首先我们来看看控制LED灯和按键的IO口

LED初始化

#include "bsp_led.h"

void LED_GPIO_Init(void)
{
    
	GPIO_InitTypeDef      GPIO_InitStructure;
	
	__HAL_RCC_GPIOB_CLK_ENABLE();
	
	GPIO_InitStructure.Pin = GPIO_PIN_5;
	GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStructure.Pull = GPIO_NOPULL;
	GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
		
	HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	
}

KEY初始化

void KEY_GPIO_Init(void)
{
    
	GPIO_InitTypeDef      GPIO_InitStructure;
	
	__HAL_RCC_GPIOE_CLK_ENABLE();
	
	GPIO_InitStructure.Pin = GPIO_PIN_3 | GPIO_PIN_4;   
	GPIO_InitStructure.Mode = GPIO_MODE_INPUT;  //读取电平需要输入模式
	GPIO_InitStructure.Pull = GPIO_NOPULL;
	GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
	
	
	HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);
	
}

main函数

#include "main.h"
#include "gpio.h"
#include "bsp_led.h"
#include "bsp_key.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);
/* 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 */
  LED_GPIO_Init();
	KEY_GPIO_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
	
	
	
  while (1)
  {
    
		if(Key_Scan(GPIOE,GPIO_PIN_3) == KEY_ON)
		{
    
			LED_RED_ON;
		}
		if(Key_Scan(GPIOE,GPIO_PIN_4) == KEY_ON)
		{
    
			while(1)
			{
    
				LED_RED_ON;
				HAL_Delay(500);     //500 ms
				LED_RED_OFF;
				HAL_Delay(500);     //500 ms
				if(Key_Scan(GPIOE,GPIO_PIN_4) == KEY_ON)
					break;
			}

			
		}

			
	}


}