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GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PF1设置成输入，默认下拉	  
GPIO_Init(GPIOF, &GPIO_InitStructure);//初始化GPIOF.1

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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF,ENABLE);

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GPIO_EXTILineConfig(GPIO_PortSourceGPIOF,GPIO_PinSource1); 

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EXTI_InitTypeDef EXTI_InitStructure;
	
EXTI_InitStructure.EXTI_Line=EXTI_Line1;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd=ENABLE;
EXTI_Init(&EXTI_InitStructure);		

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NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;			
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;	
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;					
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;							
NVIC_Init(&NVIC_InitStructure); 

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void EXTI1_IRQHandler(void)
{
	count++;
	EXTI_ClearITPendingBit(EXTI_Line1); //清除LINE0上的中断标志位  
} 

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EXTI_ClearITPendingBit(EXTI_Line1); //清除LINE0上的中断标志位