帮忙看下代码，按C13按键不起作用呢？
void key_init(void)
{
	GPIO_InitTypeDef GPIO_Initstruct;
	EXTI_InitTypeDef EXTI_Initstruct;
	NVIC_InitTypeDef NVIC_Initstruct;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIOENABLE);//GPIOC时钟使能以及复用时钟使能
	
	GPIO_Initstruct.GPIO_Pin=GPIO_Pin_1|GPIO_Pin_13;
	GPIO_Initstruct.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Initstruct.GPIO_Mode=GPIO_Mode_IPU;//按键输入上拉直接用BSRR寄存器置位
	GPIO_Init(GPIOC&GPIO_Initstruct);
	
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOCGPIO_PinSource1);//中断线1配置
	
	EXTI_Initstruct.EXTI_Line=EXTI_Line1;//
	EXTI_Initstruct.EXTI_LineCmd=ENABLE;//
	EXTI_Initstruct.EXTI_Mode=EXTI_Mode_Interrupt;//
	EXTI_Initstruct.EXTI_Trigger=EXTI_Trigger_Falling;//下降沿触发
	EXTI_Init(&EXTI_Initstruct);
	
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOCGPIO_PinSource13);//中断线13配置
	
	EXTI_Initstruct.EXTI_Line=EXTI_Line13;//
	EXTI_Initstruct.EXTI_LineCmd=ENABLE;//
	EXTI_Initstruct.EXTI_Mode=EXTI_Mode_Interrupt;//
	EXTI_Initstruct.EXTI_Trigger=EXTI_Trigger_Falling;//下降沿触发
	EXTI_Init(&EXTI_Initstruct);
	
	NVIC_Initstruct.NVIC_IRQChannel=EXTI1_IRQn;//设置中断通道
	NVIC_Initstruct.NVIC_IRQChannelPreemptionPriority=0x01;//设置抢占优先级
	NVIC_Initstruct.NVIC_IRQChannelSubPriority=0x01;//设置子优先级
	NVIC_Initstruct.NVIC_IRQChannelCmd=ENABLE;//IRQ通道使能
	NVIC_Init(&NVIC_Initstruct);//中断初始化
	
	NVIC_Initstruct.NVIC_IRQChannel=EXTI15_10_IRQn;//设置中断通道
	NVIC_Initstruct.NVIC_IRQChannelPreemptionPriority=0x01;//设置抢占优先级
	NVIC_Initstruct.NVIC_IRQChannelSubPriority=0x02;//设置子优先级
	NVIC_Initstruct.NVIC_IRQChannelCmd=ENABLE;//IRQ通道使能
	NVIC_Init(&NVIC_Initstruct);//中断初始化
	
}
 

void EXTI1_IRQHandler(void)//外部中断1服务函数
{
  delay_ms(10);
  if(EXTI_GetITStatus(EXTI_Line1))//未进入中断
	{
		led0=!led0;
	}
	EXTI_ClearITPendingBit(EXTI_Line1);//清除中断标志
}

void EXTI15_10_IRQHandler(void)
{
  	delay_ms(10);    //消抖			 
 
    if(EXTI_GetITStatus(EXTI_Line13))
	{
	 	led1=!led1;
	}
	 EXTI_ClearITPendingBit(EXTI_Line13);  //清除EXTI13线路挂起位
}