STM32F429 >> 5. 按键控制LED 开关

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本工程板级支持包文件适用于野火stm32f429 开发板。
本工程中涉及bsp_led.c, bsp_led.h 等文件，请前往STM32F429 >> 4. 使用固件库点亮LED进行查看

bsp_key.c

/**
  ******************************************************************************
  * @file    bsp_key.c
  * @author  Waao
  * @version V1.0.0
  * @date    20-Dec-2018
  * @brief   This file contains some board support package's functions for the KEY.
  *            
  ******************************************************************************
  * @attention
  *
  * None
	*
  ******************************************************************************
  */

#include <bsp_key.h>

/**
  * @brief  Initialize the key.
  * @note   None
  * @param  None  
  * @retval None
  */
void KEY_GPIO_Config(void)
{
	GPIO_InitTypeDef GPIO_Structure;
	
	RCC_AHB1PeriphClockCmd(KEY1_GPIO_CLK, ENABLE);
	RCC_AHB1PeriphClockCmd(KEY2_GPIO_CLK, ENABLE);

	
	GPIO_Structure.GPIO_Mode = GPIO_Mode_IN;
	GPIO_Structure.GPIO_Speed = GPIO_Medium_Speed;
	GPIO_Structure.GPIO_OType = GPIO_OType_PP;
	GPIO_Structure.GPIO_PuPd = GPIO_PuPd_DOWN;
	
	GPIO_Structure.GPIO_Pin = KEY1_PIN;
	GPIO_Init(KEY1_GPIO_PORT, &GPIO_Structure);

	GPIO_Structure.GPIO_Pin = KEY2_PIN;
	GPIO_Init(KEY2_GPIO_PORT, &GPIO_Structure);
}


/**
  * @brief  Detect the key whether be pressed down actually.
  * @note   None
	* @param  GPIOx: where x can be (A..K) to select the GPIO peripheral.
	*         GPIO_Pin: specifies the port bit to read. This parameter can be GPIO_Pin_x where x can be (0..15). 
  * @retval The status of the input port.
  */
int Key_Scan(GPIO_TypeDef * GPIOx, uint16_t GPIO_Pin)
{
	if(GPIO_ReadInputDataBit(GPIOx, GPIO_Pin) == KEY_ON)
	{
		while(GPIO_ReadInputDataBit(GPIOx, GPIO_Pin) == KEY_ON);
		return KEY_ON;
	}
	else
		return KEY_OFF;
}

bsp_key.h

/**
  ******************************************************************************
  * @file    bsp_key.h
  * @author  Waao
  * @version V1.0.0
  * @date    20-Dec-2018
  * @brief   This file contains some board support package's definition for the KEY.
  *            
  ******************************************************************************
  * @attention
  *
  * None
	*
  ******************************************************************************
  */
#ifndef __BSP_KEY_H_
#define __BSP_KEY_H_


#include <stm32f4xx.h>

#define KEY1_PIN             GPIO_Pin_0
#define KEY1_GPIO_PORT       GPIOA
#define KEY1_GPIO_CLK        RCC_AHB1Periph_GPIOA

#define KEY2_PIN             GPIO_Pin_13
#define KEY2_GPIO_PORT       GPIOC
#define KEY2_GPIO_CLK        RCC_AHB1Periph_GPIOC

#define KEY_ON              1
#define KEY_OFF             0


void KEY_GPIO_Config(void);
int Key_Scan(GPIO_TypeDef * GPIOx, uint16_t GPIO_Pin);


#endif

main.c

#include <stm32f4xx.h>
#include <bsp_key.h>
#include "bsp_led.h"

int main(void)
{
	LED_GPIO_Config();
	KEY_GPIO_Config();
	
	LED_BLUE;
	while(1)
	{
		if(Key_Scan(KEY2_GPIO_PORT, KEY2_PIN) == KEY_ON)
		{
			LED3_TOGGLE;
		}
		if(Key_Scan(KEY1_GPIO_PORT, KEY1_PIN) == KEY_ON)
		{
			LED3_TOGGLE;
		}
		
	}
}