EEPW论坛

#include "stm32f10x.h"   
#include "stm32_eval.h"   
//#include "delay.h"   
#include <stdio.h>   
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 10 msec interrupts  */  
  if (SysTick_Config(48000))                //SysTick配置   
  {    
    /* Capture error */    
    while (1);   
  }     
 /* Configure the SysTick handler priority */  
  NVIC_SetPriority(SysTick_IRQn, 0x0);                       //SysTick中断优先级   
}   
  
  
/** @addtogroup STM32F10x_StdPeriph_Examples  
  * @{  
  */  
  
/** @addtogroup EXTI_Config  
  * @{  
  */    
  
/* Private typedef -----------------------------------------------------------*/  
/* Private define ------------------------------------------------------------*/  
/* Private macro -------------------------------------------------------------*/  
/* Private variables ---------------------------------------------------------*/  
GPIO_InitTypeDef   GPIO_InitStructure;   
USART_InitTypeDef USART_InitStructure;   
USART_ClockInitTypeDef USART_ClockInitStructure;   
  
void RCC_Configuration(void)     
{     
  RCC_DeInit();         //将外设RCC寄存器重设为缺省值   
  RCC_HSICmd(ENABLE);           //使能内部高速晶振HSI     
  while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);     
       
  RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);      
       
  RCC_HSEConfig(RCC_HSE_OFF);    //关闭外部高速晶振   
  RCC_LSEConfig(RCC_LSE_OFF);    //关闭外部低速晶振   
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6);     // 8*6=48M赫兹     
  RCC_PLLCmd(ENABLE);            //使能   
  while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);       //检查指定的RCC标志位(PLL准备好标志位)设置与否   
  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);    //   0x08:PLL作为系统时钟   
//  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);   
}   
/*延时函数*/  
void delay_18b20(u32 nus)   
{   
    u16 i;   
    while(nus--)   
        for(i=12;i>0;i--);   
}   
  
void delay_us(u32 n)      
{      
    u8 j;      
    while(n--)      
    for(j=0;j<10;j++);      
}      
  
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);//使能   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;   
  GPIO_Init(GPIOC, &GPIO_InitStructure);   
   Set_B20() ;  //置高电平   
   delay_18b20(1);   
   Reset_B20();//置低电平   
  
   delay_18b20(480);   
   Set_B20();   
//  delay_18b20(500);   
   delay_18b20(480);   
  
    count=0;   
    aa=Read_B20();     //读数据   
    while(!aa && count<100)      
   {   
    aa=Read_B20();   
    count++;   
   }   
   if(count>=99)   
        Error_Flag=1;   
    else  
        Error_Flag=0;   
      
}   
     
unsigned char Read18B20(void)   
{     
unsigned char i=0;   
unsigned char date=0;   
u8 tempp;   
   for(i=8;i>0;i--)   
   {   
  
   Reset_B20();   
   date>>=1;      //从高位右移1位   
   delay_18b20(1);   
   Set_B20();     //置高电平   
    delay_18b20(1);   
   tempp=Read_B20();   
  
   if(tempp)   
        date|=0x80;   //   
    delay_18b20(60);   
    }   
    return(date);   
}   
void Write18B20(unsigned char date)   
{   
    unsigned char i=0;   
  
    for (i=8; i>0; i--)   
    {   
        Reset_B20();    
        delay_18b20(1);            
        if(date & 0x01)            
        {      
            Set_B20();   
        }   
        else  
        {   Reset_B20();}   
        delay_18b20(60);   
        date>>=1;         
         Set_B20();   
         delay_18b20(1);   
               
    }   
    delay_18b20(15);   
}   
  
 float Read_T()     //读温度   
{      
        unsigned char TUp,TDown;   
    unsigned char fTemp;   
    u8 TT=0;   
  
     float Temp = 0;   
    Init18B20();   
    Write18B20(0xcc);        
    Write18B20(0x44);       
    Init18B20();   
    Write18B20(0xcc);      
    Write18B20(0xbe);      
    TDown = Read18B20();       
    TUp = Read18B20();         
       
    if(TUp>0x7f)         
    {   
        TDown=~TDown;     
        TUp=~TUp+1;    
        TUp/=8;             
        zf=1;            
    }   
    else  
        zf=0;        
  
    fTemp=TDown&0x0f;          
    TUp<<=4;   
    TDown>>=4;   
    TT=TUp|TDown;   
    Temp=TT+(float)fTemp/16;           
    return(Temp);   
}   
                                    
int main(void)   
{   
           
  /*!< At this stage the microcontroller clock setting is already configured,   
       this is done through SystemInit() function which is called from startup  
       file (startup_stm32f10x_xx.s) before to branch to application main.  
       To reconfigure the default setting of SystemInit() function, refer to  
       system_stm32f10x.c file  
     */        
          
  /* System Clocks Configuration */  
    int i=0;   
  RCC_Configuration();   
  USART_int(115200);   
    SysTick_Configuration();   
    Init18B20();                //18B20初始化   
    Write18B20(0x33);     //   
  for(;i<8;i++)     
  {     
        ID[i]=Read18B20();   //读取18b20的地址放到数组中    
  }     
    printf(" config done...\r\n");   
    delay_ms(1000);   
    while(1)   
    {  flag++;   
        if(flag==300)   //每300ms读一次序列号   
        {    
            printf("The ID is:\n");   
             for(;i<8;i++)     
        {     
            printf("%x",ID[i]);     
        }    
     printf("\n");                 
    }   
           
        if(flag == 500){     //每500 ms读一次温度   
            printf("The Temperature is:%f\r\n",Read_T());//输出温度   
            printf("\r\n");   
            flag=0;   
}   
    }   
}   
  
  
  
#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   
  

#include "stm32f10x.h"   
#include "stm32_eval.h"   
#include <stdio.h>   
EXTI_InitTypeDef   EXTI_InitStructure;   
GPIO_InitTypeDef   GPIO_InitStructure;   
NVIC_InitTypeDef   NVIC_InitStructure;   
USART_InitTypeDef USART_InitStructure;   
USART_ClockInitTypeDef USART_ClockInitStructure;   
/* Private function prototypes -----------------------------------------------*/  
void EXTIkeyS1_Config(void);   
void EXTIkeyS2_Config(void);   
void EXTIkeyS3_Config(void);   
void EXTIkeyS4_Config(void);   
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_9); //  72HMz   
  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);   
  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_ResetBits(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);   
  }   
  
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_10MHz;   
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//推挽输出   
    GPIO_Init(GPIOA, &GPIO_InitStructure);   
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;   
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入   
    GPIO_Init(GPIOA, &GPIO_InitStructure);   
     
  USART_InitStructure.USART_BaudRate = BaudRate;//usart传输波比特   
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;//一帧传输或接收8bit   
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//在帧结尾传输1个停止位   
  USART_InitStructure.USART_Parity = USART_Parity_No;//奇偶失能   
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//硬件流控制失能   
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接收使能，发送使能   
  USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;//时钟低电平活动           
  USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;//始终低电平          
  USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;//时钟第二边缘进行数据捕获              
  USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据的时钟不从SCLK输出   
  USART_ClockInit(USART1, &USART_ClockInitStructure);//使能USART1时钟   
  USART_Init(USART1, &USART_InitStructure);//初始化USART1   
  USART_Cmd(USART1, ENABLE);//使能USART1外设   
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能中断   
  USART_Cmd(USART1, ENABLE);   
    
  /* Configure four bit for preemption priority */  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);   
  /* Enable the USART1 Interrupt */  
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;    
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
  NVIC_Init(&NVIC_InitStructure);   
}   
  
int main(void)   
{   
  RCC_Configuration();   
  EXTIkeyS1_Config();   
  EXTIkeyS2_Config();   
  EXTIkeyS3_Config();   
  EXTIkeyS4_Config();      
  USART_int(115200);   
  printf("Config done,waiting for interrupt......\r\n");   
             
  while (1)   
  {   
  }   
}   
  
void EXTIkeyS1_Config(void)   
{   
  /* Enable GPIOA clock */  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);   
     
 /* Configure PA.00 pin as input floating */  
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;   
  GPIO_Init(GPIOA, &GPIO_InitStructure);   
  
  /* Enable AFIO clock */  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);   
  
  /* Connect EXTI0 Line to PA.00 pin */  
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);   
  
  /* Configure EXTI0 line */  
  EXTI_InitStructure.EXTI_Line = EXTI_Line8;   
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;   
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;     
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;   
  EXTI_Init(&EXTI_InitStructure);   
  
  /* Enable and set EXTI0 Interrupt to the lowest priority */  
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;   
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
  NVIC_Init(&NVIC_InitStructure);   
}   
  
  
void EXTIkeyS2_Config(void)   
{   
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;   
  GPIO_Init(GPIOC, &GPIO_InitStructure);   
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);   
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource9);   
       
  EXTI_InitStructure.EXTI_Line = EXTI_Line9;   
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;   
 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;   
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;   
  EXTI_Init(&EXTI_InitStructure);   
       
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;   
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
  NVIC_Init(&NVIC_InitStructure);   
}   
 
void EXTIkeyS3_Config(void)   
{   
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;   
  GPIO_Init(GPIOA, &GPIO_InitStructure);   
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);   
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource10);   
  
  EXTI_InitStructure.EXTI_Line = EXTI_Line10;   
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;   
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;     
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;   
  EXTI_Init(&EXTI_InitStructure);   
  
  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;   
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
  NVIC_Init(&NVIC_InitStructure);   
}   
  void EXTIkeyS4_Config(void)   
{   
  /* Enable GPIOA clock */  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);   
    
  /* Configure PA.00 pin as input floating */  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;   
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;   
  GPIO_Init(GPIOA, &GPIO_InitStructure);   
  
  /* Enable AFIO clock */  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);   
  
  /* Connect EXTI0 Line to PA.00 pin */  
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource11);   
  
  /* Configure EXTI0 line */  
 EXTI_InitStructure.EXTI_Line = EXTI_Line11;   
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;   
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;     
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;   
  EXTI_Init(&EXTI_InitStructure);   
  
  /* Enable and set EXTI0 Interrupt to the lowest priority */  
  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;   
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
  NVIC_Init(&NVIC_InitStructure);   
}   
  
void EXTI15_10_IRQHandler(void)   
{    
    if(EXTI_GetITStatus(EXTI_Line11) != RESET)   
  {   
     GPIO_SetBits(GPIOC,GPIO_Pin_6|GPIO_Pin_7);   
     printf("S2 interrupt ......\r\n");   
     EXTI_ClearITPendingBit(EXTI_Line9);   
  }   
       
   if(EXTI_GetITStatus(EXTI_Line10) != RESET)   
  {   
     GPIO_SetBits(GPIOC,GPIO_Pin_4|GPIO_Pin_5);   
     printf("S1 interrupt ......\r\n");   
     EXTI_ClearITPendingBit(EXTI_Line8);   
  }   
.}   
void EXTI9_5_IRQHandler(void)   
.{   
 if(EXTI_GetITStatus(EXTI_Line9) != RESET)   
  {   
     printf("S2 interrupt ......\r\n");   
     EXTI_ClearITPendingBit(EXTI_Line9);   
  }   
       
    if(EXTI_GetITStatus(EXTI_Line8) != RESET)   
  {    
     GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1);   
     printf("S1 interrupt ......\r\n");   
     EXTI_ClearITPendingBit(EXTI_Line8);   
 }   
 
 
void assert_failed(uint8_t* file, uint32_t line)   
{    
    
  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__ */   
     
  
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   
 
void assert_failed(uint8_t* file, uint32_t line)   
{    
   
 while (1)   
 {   
  }   
}   

.#endif