端口配置：

void GPIO_Configuration(void)
{

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);

GPIO_InitStructure.GPIO_Pin = IR_int_IN|IR_int_OUT; //IR_int 作为输入
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING ; //输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);

}

//时钟配置

void RCC_Configuration(void)
{
SystemInit();
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

RCC_APB2PeriphClockCmd( | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
}

//中断配置

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); // 抢占式优先级别
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //指定中断源
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // 指定响应优先级别1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}

/////////////////GPIO中断处理函数/////////////
void EXTI9_5_IRQHandler(void)
{
IWDG_ReloadCounter();//喂狗
if (EXTI_GetITStatus(EXTI_Line6) != RESET)
{
//添加中断处理程序
speakertest();

EXTI_ClearFlag(EXTI_Line6);

}

if (EXTI_GetITStatus(EXTI_Line7) != RESET)
{
//添加中断处理程序
speakertest();

EXTI_ClearFlag(EXTI_Line7);

}
}