STM32F429 >> 5. 按键控制LED 开关

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

/**

  * @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

#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

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main.c

#include

#include

#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;

}

}

}