EEPW论坛

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
#include "stm32f10x.h"   
#include "stm32_eval.h"   
#include    "stdio.h"   
#include "math.h"   
#define buff_size  16;        
char rx_buff[], rx_buff_count=0;   
  
GPIO_InitTypeDef  GPIO_InitStructure;   
USART_InitTypeDef  USART_InitStructure;   
NVIC_InitTypeDef  NVIC_InitStructure;   
USART_ClockInitTypeDef  USART_ClockInitStructure;   
  
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   
    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);//关闭蜂鸣器   
}   
void GPIO_INIT()   
{   
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);//使能PC时钟
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;   
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出    
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化PB
   GPIO_SetBits(GPIOB, GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);
}   
  
void USART_int(long BaudRate)   
{   USART_InitTypeDef USART_InitStructure;     
    USART_ClockInitTypeDef USART_ClockInitStructure;     
     NVIC_InitTypeDef NVIC_InitStructure;  
     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);//使能PA USART1   
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//TX 位于PA9    
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;   
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推挽输出  
   GPIO_Init(GPIOA, &GPIO_InitStructure);// TX初始化 PA9 
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;// RX位于PA10    
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//悬空输入 
   GPIO_Init(GPIOA, &GPIO_InitStructure);//RX初始化 PA10    
  /* 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;//传输速率    
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长8比特  
    USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位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;// 接受和发送
    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);//初始化USART1时钟 
    USART_Init(USART1, &USART_InitStructure);//初始化USART1时钟    
    USART_Cmd(USART1, ENABLE);    
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);   
    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; //选择USART1中断通道  
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;   
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
    NVIC_Init(&NVIC_InitStructure);//初始化中断  
}   
  
/*delay_us*/    
     
void delay_us(u32 n)      
{      
    u8 j;      
    while(n--)      
    for(j=0;j<10;j++);      
}      
/*延时函数 微秒*/     
void  delay_ms(u32 n)      
{      
   while(n--)      
    delay_us(1000);      
}    
/*delay_ms*/   
void USART_SendStr(char *str)      //发送字符串函数  
{   
   while((*str)!='\0')             //发送完直至最后     
        {USART_SendData(USART1,*str++);   
        while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);   
        }    
unsigned int my_atoi(char* pstr) //字符串   
{      
      int s = 0;     
        while(*pstr != '\0')        //一直扫描到字符串   
        {   
                if(*pstr >= '0' && *pstr <= '9')  //字符串中有数字0-9   
                {     
                        s = s * 10 + *pstr - '0';      
                }     
                pstr++;   
        }          
    return s;    
} 
       
 void Num(int i)   
{   
      switch(i)//点亮对应输入的数字   
    {   
        case 0 : GPIO_ResetBits(GPIOB,GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);break;   
        case 1 : GPIO_ResetBits(GPIOB,GPIO_Pin_9|GPIO_Pin_12);                                              break;   
        case 2 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_13|GPIO_Pin_14);            break;   
        case 3 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14);            break;   
        case 4 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12);                        break;   
        case 5 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_12|GPIO_Pin_14);            break;   
        case 6 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);break;   
        case 7 : GPIO_ResetBits(GPIOB,GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12);                                   break;   
        case 8 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);break;   
        case 9 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14); break;   
		} 
	}		
    void func(char *S,char LEN)     
{ 
	int z;
   GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);      
       
    while(1)   
    {          
       z=my_atoi(S);   
      
        GPIO_SetBits(GPIOB,GPIO_Pin_1);         //打开个位数码管   
        Num(z%10);                                //点亮各位数    
        delay_ms(5);                             
        GPIO_ResetBits(GPIOB,GPIO_Pin_1);        //关闭个位数码管        
        GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);   
               
        GPIO_SetBits(GPIOB,GPIO_Pin_15);           //打开十位数码管   
        Num(z/10);     
        delay_ms(5);   
        GPIO_ResetBits(GPIOB,GPIO_Pin_15);      //关闭十位     
        GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);   
                   
		} 
	}
	void input_ASK()     
{     
    char j;     
    func(rx_buff,rx_buff_count);     
    rx_buff_count=0;     
    for (j=0;j<rx_buff_count;j++)     
    {rx_buff[j]='\0';} 
   // USART_SendStr("\n>");     
}     

int main()     
{                              
        RCC_Configuration();   
      GPIO_INIT();    
        USART_int(9600);   
       // USART_SendStr("Please input like: data=\r\n");   
        //USART_SendStr("\n>");   
        while(1){   
                }   
}   
  
void USART1_IRQHandler(void)    
{    
  while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)   
  {    
  }    
    if(USART_ReceiveData(USART1)==0x0d)     //如果接收到回车，结束输入   
    {input_ASK();}   
    else  
    {   
    USART_SendData(USART1,USART_ReceiveData(USART1));   
    rx_buff[rx_buff_count]= USART_ReceiveData(USART1);   
        rx_buff_count++;   
    }   
  USART_ClearFlag(USART1, USART_FLAG_RXNE);   
  
}  

	© COPYRIGHT 2011 STMicroelectronics

******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_eval.h"
#include 
/** @addtogroup STM32F10x_StdPeriph_Examples
  * @{
  */

/** @addtogroup EXTI_Config
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
EXTI_InitTypeDef   EXTI_InitStructure;
GPIO_InitTypeDef   GPIO_InitStructure;
NVIC_InitTypeDef   NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;//初始化
/* 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);//点亮LED
}

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; 
    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;
  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_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);
 
  /* 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);
}

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{RCC_Configuration();
  
  /* Configure PA.00 in interrupt mode */
  EXTIkeyS1_Config();

  /* Configure PB.09 or PG.08 in interrupt mode */
  EXTIkeyS2_Config();
  EXTIkeyS3_Config();
  EXTIkeyS4_Config();
  USART_int(115200);
	printf("Config done,waiting for interrupt......\r\n");
          
  while (1)
  {
  }
}

/**
  * @brief  Configure PA.00 in interrupt mode
  * @param  None
  * @retval None
  */
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;//S1
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Enable AFIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

  /* Connect EXTI0 Line to PA.00 pin */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);//配置外部中断

  /* Configure EXTI0 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line8;//S1
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断模式
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发 
  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;//使能按键所在的外部中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;//抢占优先级
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;//子优先级
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);
}

/**
  * @brief  Configure PB.09 or PG.08 in interrupt mode
  * @param  None
  * @retval None
  */
void EXTIkeyS2_Config(void)
{
  /* Enable GPIOB clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

  /* Configure PB.09 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//S2
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Enable AFIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  /* Connect EXTI9 Line to PB.09 pin */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource9);//配置外部中断

  /* Configure EXTI9 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line9;//S2
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//下降沿触发
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI9_5 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 EXTIkeyS3_Config(void)
{
  /* Enable GPIOB clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

  /* Configure PB.09 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//S3
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Enable AFIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  /* Connect EXTI9 Line to PB.09 pin */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource10);

  /* Configure EXTI9 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line10;//S3
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;//上升沿触发
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI9_5 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 EXTIkeyS4_Config(void)
{
  /* Enable GPIOB clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

  /* Configure PB.09 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//S4
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Enable AFIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  /* Connect EXTI9 Line to PB.09 pin */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource11);

  /* Configure EXTI9 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line11;//S4
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;//上升沿触发
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI9_5 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);
}
/******************************************************************************/
/*            STM32F10x Peripherals Interrupt Handlers                        */
/******************************************************************************/

/**
  * @brief  This function handles External lines 9 to 5 interrupt request.
  * @param  None
  * @retval None
  */
void EXTI9_5_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line9) != RESET)//判断某个线上的中断是否发生    S2
  {
    /* Toggle LED2 */
     GPIO_SetBits(GPIOC,GPIO_Pin_4|GPIO_Pin_5);//熄灭D5-6
   printf("S2 interrupt ......\r\n");
    /* Clear the  EXTI line 9 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line9);//清除LINE9上的中断标志位
  }
	if(EXTI_GetITStatus(EXTI_Line8) != RESET)//                              S1
  {
    /* Toggle LED1 */
     GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2);//熄灭D1-2-3
   printf("S1 interrupt ......\r\n");
    /* Clear the  EXTI line 0 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line8);
  }
}

void EXTI15_10_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line11) != RESET)//                              S4
  {
    /* Toggle LED4 */
     GPIO_SetBits(GPIOC,GPIO_Pin_3);//熄灭D3-4
    printf("S4 interrupt ......\r\n");
    /* Clear the  EXTI line 0 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line11);
  }
	if(EXTI_GetITStatus(EXTI_Line10) != RESET)//                               S3
  {
    /* Toggle LED3 */
     GPIO_SetBits(GPIOC,GPIO_Pin_6|GPIO_Pin_7);//熄灭D7-8
     printf("S3 interrupt ......\r\n");
    /* Clear the  EXTI line 0 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line10);
  }
}

#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
  */

<embed src="http://player.youku.com/player.php/sid/XODM4MDYwNTUy/v.swf" allowFullScreen="true" quality="high" width="480" height="400" align="middle" allowScriptAccess="always" type="application/x-shockwave-flash"></embed>

D2隔1s亮一次

D3隔2s亮一次

D4隔3s亮一次

/* Includes ------------------------------------------------------------------*/  
#include "stm32f10x.h"   
#include "stm32_eval.h"   
#include <stdio.h>   
/** @addtogroup STM32F10x_StdPeriph_Examples  
  * @{  
  */  
  
/** @addtogroup EXTI_Config  
  * @{  
  */    
  
/* Private typedef -----------------------------------------------------------*/  
/* Private define ------------------------------------------------------------*/  
/* Private macro -------------------------------------------------------------*/  
/* Private variables ---------------------------------------------------------*/  
EXTI_InitTypeDef   EXTI_InitStructure;   
GPIO_InitTypeDef   GPIO_InitStructure;   
NVIC_InitTypeDef   NVIC_InitStructure;   
USART_InitTypeDef USART_InitStructure;   
USART_ClockInitTypeDef USART_ClockInitStructure;   
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;   
TIM_OCInitTypeDef  TIM_OCInitStructure;   
long flag;   

       
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);   
 GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG  管脚映射重映射   
  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|RCC_APB1Periph_TIM3|RCC_APB1Periph_TIM7, ENABLE);//TIM2  TIM3   
       
       
       
}   
  
void USART_int(long BaudRate)//USART1初始化   
{   
    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;    
    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;//传输速率 
  USART_InitStructure.USART_WordLength =USART_WordLength_8b;//   字长8比特
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位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;//接受和输出   
    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);//使能USART1      
}   
  
void NVIC_Configuration(void)//中断优先级设置   
{   
  NVIC_InitTypeDef NVIC_InitStructure;//定义结构体变量   
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);//设置优先级分组   
  /* Enable the TIM2 global Interrupt */  
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;//TIM2中断   
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//从优先级1级   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能   
    NVIC_Init(&NVIC_InitStructure);//初始化NVIC寄存器   
       
    /* Enable the TIM3 global Interrupt */  
  NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;//TIM3中断   
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority =1;//从优先级1级   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能   
  NVIC_Init(&NVIC_InitStructure);//初始化NVIC寄存器   
       
    /* Enable the TIM7 global Interrupt */  
  NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn;//TIM7中断   
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级   
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//从优先级1级   
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能   
  NVIC_Init(&NVIC_InitStructure);//初始化NVIC寄存器   
}   
  
void Timer_Config(void)   
{   
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;//定义结构体变量   
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//使能TIM2外设   
    TIM_DeInit(TIM2);//复位时钟TIM2，恢复初始状态   
     /* Time base configuration */  
  TIM_TimeBaseStructure.TIM_Period = 36000;//周期   
  TIM_TimeBaseStructure.TIM_Prescaler = 1000;//分频系数   
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//设置时钟分割   
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式   
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//初始化TIM2     
    TIM_ClearFlag(TIM2,TIM_FLAG_Update);//清楚标志   
  TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE ); //使能TIM2的更新中断   
  /* TIM2 enable counter */  
  TIM_Cmd(TIM2, ENABLE);//使能TIM2外设   
       
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);//使能TIM3外设   
    TIM_DeInit(TIM3);//复位时钟TIM3，恢复初始状态   
     /* Time base configuration */  
  TIM_TimeBaseStructure.TIM_Period = 56000;//周期   
  TIM_TimeBaseStructure.TIM_Prescaler = 1000;//分频系数   
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//设置时钟分割   
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式   
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//初始化TIM3   
    TIM_ClearFlag(TIM3,TIM_FLAG_Update);//清楚标志   
  TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能TIM3的更新中断   
  /* TIM2 enable counter */  
  TIM_Cmd(TIM3, ENABLE);//使能TIM3外设   
  
    RCC_APB2PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE);//使能TIM7外设   
    TIM_DeInit(TIM7);//复位时钟TIM8，恢复初始状态   
     /* Time base configuration */  
  TIM_TimeBaseStructure.TIM_Period = 5000;//周期   
  TIM_TimeBaseStructure.TIM_Prescaler = 7100;//分频系数   
  TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ;//设置时钟分割   
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式   
  TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure);//初始化TIM2     
    TIM_ClearFlag(TIM7,TIM_FLAG_Update);//清楚标志   
  TIM_ITConfig(TIM7,TIM_IT_Update,ENABLE ); //使能TIM8的更新中断   
  /* TIM2 enable counter */  
  TIM_Cmd(TIM7, ENABLE);//使能TIM2外设   
}   
  
void TIM2_IRQHandler(void) //TIM2中断   
{   
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //检查TIM2更新中断发生与否   
{   
TIM_ClearITPendingBit(TIM2, TIM_IT_Update ); //清除TIM2更新中断标志   
    GPIO_SetBits(GPIOC,GPIO_Pin_1);   
}   
}   
  
void TIM3_IRQHandler(void) //TIM3中断   
{   
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查TIM3更新中断发生与否   
{   
TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIM2更新中断标志   
    GPIO_SetBits(GPIOC,GPIO_Pin_2);   
}   
}   
  
void TIM7_IRQHandler(void) //TIM7中断   
{   
if (TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET) //检查TIM7更新中断发生与否   
{   
TIM_ClearITPendingBit(TIM7, TIM_IT_Update ); //清除TIM2更新中断标志   
    GPIO_SetBits(GPIOC,GPIO_Pin_3);   
}   
}  
 
/* Private functions ---------------------------------------------------------*/  
  
/**  
  * @brief  Main program.  
  * @param  None  
  * @retval None  
  */  
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 RCC_Configuration(void)//外设时钟使能   
{   
    SystemInit();   
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 */  
  
  RCC_Configuration();   
  USART_int(115200);   
    NVIC_Configuration();   
    printf(" config done...\r\n");   
  Timer_Config();   
 TIM2_IRQHandler();   
 TIM3_IRQHandler();   
 TIM7_IRQHandler();   
    
  while (1){           
GPIO_ResetBits(GPIOC,GPIO_Pin_1);   
        delay_ms(400);   
GPIO_ResetBits(GPIOC,GPIO_Pin_2);   
        delay_ms(400);   
GPIO_ResetBits(GPIOC,GPIO_Pin_3);   
        delay_ms(400);   
}   
}   
  
#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  

建议还是自己写一个toggle程序吧

一直是set和reset

视频地址：http://player.youku.com/player.php/sid/XODQxNTIwNzQw/v.swf
 

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_eval.h"
#include <stdio.h>
#define VREF 3.3
int temp0,temp1,temp2; 
GPIO_InitTypeDef   GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;

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 RCC_Configuration(void)
{
	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 PWM_Config()
{uint16_t PrescalerValue = 0;//预分频器值    
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
	/* TIM2 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
  /* GPIOA  enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO  , ENABLE);//使能复用功能时钟   
	
		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出   
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
		TIM_Cmd(TIM2, ENABLE);//TIM2使能
	  /* Compute the prescaler value */
  PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 0x07FF;//设置自动重装载 
  TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;//设置预分频值 
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;//设置时钟分割TDTS=Tck_tim     

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//根据指定参数初始化TIMx     

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//选择PWM模式1
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//输出极性高
  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 0xFFFF;//通道占空比时间
  TIM_OC2Init(TIM2, &TIM_OCInitStructure);//初始化TIM2 OC2     

	/* PWM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//比较输出使能  
  TIM_OCInitStructure.TIM_Pulse = 0xFFFF;//通道占空比时间 
  TIM_OC3Init(TIM2, &TIM_OCInitStructure);//初始化TIM2 OC3     

	/* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 0xFFFF;//通道占空比时间
  TIM_OC4Init(TIM2, &TIM_OCInitStructure);//初始化TIM2 OC4     
        

  TIM_ARRPreloadConfig(TIM2, ENABLE);//使能预装载寄存器  
}
    
void colour(int z)
{
   switch(z))//分别点亮相应的颜色

 {
  case 0 : temp0=2000,temp1=2000,temp2=0; break;
  case 1 : temp0=1900,temp1=0,temp2=1900;       break;
  case 2 : temp0=0,temp1=2000,temp2=2000;  break;
  case 3 : temp0=250,temp1=1700,temp2=1700;   break;
  case 4 : temp0=500,temp1=300,temp2=1800;        break;
   case 5 : temp0=400,temp1=1500,temp2=1000;       break;
    case 6 : temp0=1300,temp1=800,temp2=1200;        break;
  }
} 

void PWM_TEST()
{ 
  int i=0;
 for(i=0;i<7;i++)
 {
      colour(i);  //temp1-Red,temp2-Green,temp0-Blue
  TIM_SetCompare2(TIM2,temp0);delay_ms(500);      
       TIM_SetCompare3(TIM2,temp1);delay_ms(500);           
       TIM_SetCompare4(TIM2,temp2);delay_ms(500);     

  }
} 
int main(void)

{
	
  RCC_Configuration();
  USART_int(115200);
	
	printf(" config done...\r\n");
	PWM_Config();
	delay_ms(1000);
	while(1)
	{
		PWM_TEST();
	}
}
#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****/

还行

灯可真亮，电阻值错了么？

#include "stm32f10x.h"     
#include "stm32_eval.h"     
#include <stdio.h>     
#define VREF 3.3     
unsigned char i=0;     
void EXTIkeyS1_Config(void);     
/** @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;     
EXTI_InitTypeDef   EXTI_InitStructure;     
NVIC_InitTypeDef   NVIC_InitStructure;     
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_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 GPIO_INIT()     
{     
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);     
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;     
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;     
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;     
  GPIO_Init(GPIOB, &GPIO_InitStructure);     
         
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);     
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11;     
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;     
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;     
  GPIO_Init(GPIOC, &GPIO_InitStructure);     
}     
     
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 Iic1_Init(void)     
{     
        GPIO_InitTypeDef GPIO_InitStructure;     
        I2C_InitTypeDef I2C_InitStructure;     
             
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);     
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);     
        //PB6-I2C2_SCL PB7-I2C2_SDA PB10-I2C2_SCL PB11-I2C2_SDA     
        /* Configure IO connected to IIC*********************/     
        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10 | GPIO_Pin_11;     
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;     
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;     
        GPIO_Init(GPIOB, &GPIO_InitStructure);     
             
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;     
        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;     
        I2C_InitStructure.I2C_OwnAddress1 = 0xA0;     
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;     
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;     
        I2C_InitStructure.I2C_ClockSpeed = 400000;            
        I2C_Cmd(I2C2, ENABLE);        
        I2C_Init(I2C2, &I2C_InitStructure);     
        I2C_AcknowledgeConfig(I2C2, ENABLE);         
}     
     
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);     
}     
     
int table[10]=     
{GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8 ,GPIO_Pin_9|GPIO_Pin_12 ,GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_5,       
GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_5,GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_8|GPIO_Pin_5,GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_8|GPIO_Pin_5,       
GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8|GPIO_Pin_5,GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12,       
GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14         
};    
      
void number(unsigned char i)     
{     
      char g=0,s=0;        
    g=i%10; s=i/10;       
    GPIO_SetBits(GPIOB,GPIO_Pin_1);        
    GPIO_ResetBits(GPIOB,table[g]);        
    delay_ms(1);        
    GPIO_ResetBits(GPIOB,GPIO_Pin_1);        
    GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);     
                    
    GPIO_SetBits(GPIOB,GPIO_Pin_15);        
    GPIO_ResetBits(GPIOB,table[s]);          
    delay_ms(1);        
    GPIO_ResetBits(GPIOB,GPIO_Pin_15);        
    GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);     
}     
     
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);     
}     
     
/**********************************************************************/     
/*IIC?????                                                                               */     
/*                                                                                                                                          */     
/**********************************************************************/     
void I2C2_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)     
{     
        while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));     
        I2C_GenerateSTART(I2C2,ENABLE);     
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));     
        I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);     
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));     
        I2C_SendData(I2C2, write_address);     
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));     
        I2C_SendData(I2C2, byte);     
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));     
        I2C_GenerateSTOP(I2C2, ENABLE);     
     
        do     
        {                     
                /* Send START condition */     
                I2C_GenerateSTART(I2C2, ENABLE);     
                /* Read I2C2 SR1 register */     
                /* Send EEPROM address for write */     
                I2C_Send7bitAddress(I2C2, 0xA0, I2C_Direction_Transmitter);     
        }while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002));     
     
        /* Clear AF flag */     
        I2C_ClearFlag(I2C2, I2C_FLAG_AF);     
        /* STOP condition */         
        I2C_GenerateSTOP(I2C2, ENABLE);       
}     
     
     
unsigned char I2C2_ReadByte(unsigned char  id, unsigned char read_address)     
{       
    unsigned char temp;              
    while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){}     
    I2C_GenerateSTART(I2C2, ENABLE);     
    while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));     
    I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);     
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));     
    I2C_Cmd(I2C2, ENABLE);     
    I2C_SendData(I2C2, read_address);       
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));     
    I2C_GenerateSTART(I2C2, ENABLE);     
    while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));     
    I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver);     
    while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));     
    I2C_AcknowledgeConfig(I2C2, DISABLE);     
    I2C_GenerateSTOP(I2C2, ENABLE);     
    while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));     
                
    temp = I2C_ReceiveData(I2C2);       
    I2C_AcknowledgeConfig(I2C2, ENABLE);     
    return temp;     
}     
     
/* Private functions ---------------------------------------------------------*/     
     
/**   
  * @brief  Main program.   
  * @param  None   
  * @retval None   
  */     
int main(void)     
{      
    unsigned char count=0;     
  /*!< 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 */     
  RCC_Configuration();     
  GPIO_INIT();     
    USART_int(115200);       
    Iic1_Init();     
  EXTIkeyS1_Config();        
    printf(" config done...\r\n");     
    delay_ms(1000);     
    while(1)     
    {     
         count=I2C2_ReadByte(0xA0,0);    
           
     number(count);   
if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_11))     
    {  delay_ms(200);   
      i=0;             
         I2C2_WriteByte(0xA0,i,i);     
                   
    }     
}            
  }   
void EXTI9_5_IRQHandler(void)     
{     
    if(EXTI_GetITStatus(EXTI_Line8) != RESET)     
  {  delay_ms(200);   
        i++;     
        I2C2_WriteByte(0xA0,0,i);    
 printf(" 写入的数据%d\r\n",i);         
    EXTI_ClearITPendingBit(EXTI_Line8);     
  }     
}     
         
#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;     
}