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其实有试过的，把S2键的中断放进来，i置零，void EXTIkeyS2_Config(void);也有

可是这样不知道为什么记数就记不了，按下S1键就显示1，然后怎么按都没反应了

	/**
  ******************************************************************************
  * @file    EXTI/EXTI_Config/main.c 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */



	/* Includes ------------------------------------------------------------------*/

#include "stm32f10x.h"   
#include "stm32_eval.h"   
#include    
volatile int flag;   
#define Set_B20()    GPIO_SetBits(GPIOC, GPIO_Pin_12)   
#define Reset_B20()  GPIO_ResetBits(GPIOC, GPIO_Pin_12)   
#define Read_B20()   GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)   
unsigned char Error_Flag=0;   
unsigned char zf=0;   
unsigned char ID[8];   
void SysTick_Configuration(void)   
{   
  /* Setup SysTick Timer for 1 msec interrupts  */  
  if (SysTick_Config(48000))                //SysTick配置 48000/48MHZ=1ms 滴答一次   
  {    
    /* Capture error */    
    while (1);   
  }     
 /* Configure the SysTick handler priority */  
  NVIC_SetPriority(SysTick_IRQn, 0x0);                       //SysTick中断优先级   
}   
  
GPIO_InitTypeDef   GPIO_InitStructure;   
USART_InitTypeDef USART_InitStructure;   
USART_ClockInitTypeDef USART_ClockInitStructure;   
#define RCC_PLLSource_HSE_Div1           ((uint32_t)0x00010000)   
  
void RCC_Configuration(void)   
{   
  RCC_DeInit();   
       
  RCC_HSICmd(ENABLE);   
  while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);   
     
  RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);   
     
  RCC_HSEConfig(RCC_HSE_OFF);   
  RCC_LSEConfig(RCC_LSE_OFF);   
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6); // 6*8Mhz= 48MHz   
  RCC_PLLCmd(ENABLE);   
  while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);   
  RCC_ADCCLKConfig(RCC_PCLK2_Div4);   
  RCC_PCLK2Config(RCC_HCLK_Div1);   
  RCC_PCLK1Config(RCC_HCLK_Div2);   
  RCC_HCLKConfig(RCC_SYSCLK_Div1);   
  RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);   
  while(RCC_GetSYSCLKSource() != 0x08);   
//  SystemInit();   
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);   
 GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG   
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);   
 GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;   
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;   
  GPIO_Init(GPIOD, &GPIO_InitStructure);   
    GPIO_ResetBits(GPIOD,GPIO_Pin_2);   
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);   
 GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;   
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;   
  GPIO_Init(GPIOC, &GPIO_InitStructure);   
    GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);   
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);   
}    
  
void USART_int(long BaudRate)   
{   
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);   
       GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;   
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    
    GPIO_Init(GPIOA, &GPIO_InitStructure);   
    /* PA10 USART1_Rx  */  
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;   
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;   
    GPIO_Init(GPIOA, &GPIO_InitStructure);   
  /* USARTx configured as follow:  
        - BaudRate = 115200 baud    
        - Word Length = 8 Bits  
        - One Stop Bit  
        - No parity  
        - Hardware flow control disabled (RTS and CTS signals)  
        - Receive and transmit enabled  
  */  
  USART_InitStructure.USART_BaudRate = BaudRate;//??????   
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;//???????8bit   
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//????1   
  USART_InitStructure.USART_Parity = USART_Parity_No;//????   
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//??????none   
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//??????????   
    USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;        
    USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;         
    USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;         
    USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;   
    USART_ClockInit(USART1, &USART_ClockInitStructure);   
  USART_Init(USART1, &USART_InitStructure);   
  USART_Cmd(USART1, ENABLE);   
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);   
 USART_Cmd(USART1, ENABLE);   
}   
  
void delay_18b20(u32 nus)   
{   
    u16 i;   
    while(nus--)   
        for(i=12;i>0;i--);   
}   
/*delay_us*/    
void delay_us(u32 n)   
{   
    u8 j;   
    while(n--)   
    for(j=0;j<10;j++);   
}   
/*delay_ms*/    
  
void  delay_ms(u32 n)   
{   
    while(n--)   
    delay_us(1000);   
}   
  
void Init18B20(void)//18B20初始化   
{   
   u8 aa=0;   
   u8 count =0;   
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //GPIOC的复用时钟使能   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//选择PC12   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;//开漏输出   
  GPIO_Init(GPIOC, &GPIO_InitStructure);//GPIOC初始化   
   Set_B20() ;   
    /*复位时需要至少480us的低电平*/  
   delay_18b20(1);   
   Reset_B20();   
   delay_18b20(480);   
    /* 探测到上升沿后等待15~60us后18B20发出存在脉冲 */  
   Set_B20();   
   delay_18b20(480);   
  
    count=0;   
    aa=Read_B20();//读取18B20的一个字节 赋值给aa   
       
    /*   校验读取值，错误次数大于99才报错 */  
    while(!aa && count<100)      
   {   
    aa=Read_B20();   
        count++;   
   }   
   if(count>=99)   
        Error_Flag=1;   
    else  
        Error_Flag=0;   
}   
     
unsigned char Read18B20(void)//读取18B20的一个字节   
{     
    unsigned char i=0;   
    unsigned char date=0;   
    u8 tempp;   
   for(i=8;i>0;i--)//按位读取，读取一个字需要循环8次   
   {   
        Reset_B20();//拉低电平   
        date>>=1;//date右移一位   
        delay_18b20(1);   
        Set_B20(); //置高电平   
    delay_18b20(1);   
        tempp=Read_B20();//读取温度值   
        if(tempp)//若读取到的值非0   
    {date|=0x80;} //将date的最高位置1   
        delay_18b20(60);   
    }   
    return(date);   
}   
void Write18B20(unsigned char date)//写入   
{   
    unsigned char i=0;   
  
    for (i=8; i>0; i--)   
    {   
        Reset_B20(); //置低电平   
        delay_18b20(1);            
        if(date & 0x01)     //如果date最低位为1      
        {      
            Set_B20();//置高电平   
        }   
        else//如果date最低位为0   
        {   
            Reset_B20();}//置低电平   
            delay_18b20(60);   
            date>>=1;     //date右移一位   
            Set_B20();//置高电平   
            delay_18b20(1);   
    }   
    delay_18b20(15);   
}   
  
 float Read_T()//读取温度值   
{      
    unsigned char TUp,TDown;   
    unsigned char fTemp;   
    u8 TT=0;   
    float Temp = 0;   
    Init18B20();//1820初始化   
    Write18B20(0xcc); //不提供64位ROM编码使用存储器         
    Write18B20(0x44); //启动一次温度转换        
    Init18B20();//1820初始化   
    Write18B20(0xcc); //不提供64位ROM编码使用存储器       
    Write18B20(0xbe);   //从字节0开始读取暂存器内容   
    /*两次读取温度*/  
    TDown = Read18B20();       
    TUp = Read18B20();         
       
    if(TUp>0x7f)    //  如果TUp的值大于最大值（11111111）bin   
    {   
        TDown=~TDown;  //TDown取反   
        TUp=~TUp+1; //TUp取反加一   
        TUp/=8; //TUp除以8            
        zf=1;    //zf标志位置1        
    }   
    else  
        zf=0;        
    fTemp=TDown&0x0f;//TDown保留后四位，赋值给fTemp     
    TUp<<=4;//TUp左移四位，舍去高四位   
    TDown>>=4;//TDown右移四位，舍去低四位   
    TT=TUp|TDown;//TUp与TDown合并 赋值给TT   
    Temp=TT+(float)fTemp/16;           
    return(Temp);   
}   
                                    
int main(void)   
{   
    int i;   
    RCC_Configuration();   
    USART_int(115200);   
    Init18B20();//初始化18B20   
    SysTick_Configuration();//系统滴答时钟配置   
  
    printf(" config done...\r\n");   
    Write18B20(0x33);//此命令获取18B20的ID   
    for(i=0;i<8;i++)//用一个8位的数组保存id值   
    {   
        ID[i]=Read18B20();   
    }   
    delay_ms(1000);   
    while(1)   
    {
     if(flag==300)//300ms输出一次id   
    {   
        printf("\r\nevent 1 oc......\r\n");   
        printf("The id is :\r\n");   
        for(i=0;i<8;i++)   
        {   
            printf("%x",ID[i]);   
        }   
    }   
    else if(flag==500)//500ms输出一次温度   
    {   
        printf("\r\nevent 2 oc......\r\n");   
        printf("The Temperature is:%f\r\n",Read_T());
     }   
}   
 
#ifdef  USE_FULL_ASSERT   
  
/**  
  * @brief  Reports the name of the source file and the source line number  
  *         where the assert_param error has occurred.  
  * @param  file: pointer to the source file name  
  * @param  line: assert_param error line source number  
  * @retval None  
  */  
void assert_failed(uint8_t* file, uint32_t line)   
{    
  /* User can add his own implementation to report the file name and line number,  
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */  
  
  /* Infinite loop */  
  while (1)   
  {   
  }   
}   
  
#endif   
  
/**  
  * @}  
  */    
  
/**  
  * @}  
  */    
  
#ifdef __GNUC__   
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf  
     set to 'Yes') calls __io_putchar() */  
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)   
#else   
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)   
#endif /* __GNUC__ */   
     
  
  
/**  
  * @brief  Retargets the C library printf function to the USART.  
  * @param  None  
  * @retval None  
  */  
PUTCHAR_PROTOTYPE   
{   
  /* Place your implementation of fputc here */  
  /* e.g. write a character to the USART */  
  USART_SendData(EVAL_COM1, (uint8_t) ch);   
  
  /* Loop until the end of transmission */  
  while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)   
  {}   
  
  return ch;   
}   
  
#ifdef  USE_FULL_ASSERT   
  
/**  
  * @brief  Reports the name of the source file and the source line number  
  *         where the assert_param error has occurred.  
  * @param  file: pointer to the source file name  
  * @param  line: assert_param error line source number  
  * @retval None  
  */  
void assert_failed(uint8_t* file, uint32_t line)   
{    
  /* User can add his own implementation to report the file name and line number,  
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */  
  
  /* Infinite loop */  
  while (1)   
  {   
  }   
}   
  
#endif   
  
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/  

 怎么感觉又是keil5的问题才会这样啊- -