button.c

#include "button.h"

void Button_Config(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;

	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD,ENABLE);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
	GPIO_Init(GPIOD,&GPIO_InitStructure);
}

void Button_IT_Config(void)
{
	EXTI_InitTypeDef EXTI_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG,ENABLE);
	SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD,EXTI_PinSource3);

	EXTI_InitStructure.EXTI_Line = EXTI_Line3 ;     
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);

	NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 8;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
}