我的stm32 中断为什么进不去，都弄了好几天了，郁闷啊！
望高手指教,代码如下：
#include <stm32f10x.h>
#include "stm32f10x_it.h"


void UART2_GPIO_Configuration(void);
void UART2_Configuration(void);
void NVIC_Configuration(void);

void delay(uint32_t nCount);

int main()
{
  SystemInit();
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

  NVIC_Configuration();

  UART2_GPIO_Configuration();
  UART2_Configuration();

  while(1)
  {
  这里不停的发送那个变量的值，初始值为0，进入接受中断后更改其值
  }
}

/*********************************配置UART2的GPIO口*************************************/
void UART2_GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// Configure USART1_Tx as alternate function push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

// Configure USART1_Rx as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);  //复用重映射UART2
}

/************************************配置串口2参数***********************************/

void UART2_Configuration(void)
{

   USART_InitTypeDef USART_InitStructure;

   USART_InitStructure.USART_BaudRate = 115200;
   USART_InitStructure.USART_WordLength = USART_WordLength_8b;
   USART_InitStructure.USART_StopBits = USART_StopBits_1;
   USART_InitStructure.USART_Parity = USART_Parity_No ;
   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
   USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

   USART_Init(USART2, &USART_InitStructure);

   USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);       //使能UART2接收中断

USART_Cmd(USART2, ENABLE);
}
/*******************************************************************************
* Function Name   : NVIC_Configuration
* Description        : Configures NVIC and Vector Table base location.
* Input                    : None
* Output                 : None
* Return                 : None
*******************************************************************************/

void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure one bit for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

中断服务程序如下：
  if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
  {
    /* Disable SC_USART RXNE Interrupt */
   在这里我通更改一个变量的值，然后再主函数里继续死循环的发送。
  }
但是，一旦从电脑上通过串口发送个数据，就死掉了，是怎么回事啊！