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高工

2014-10-28 12:30:27 打赏

11楼

又case到30了

能优化一下结和数据定义构不，童鞋

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菜鸟

2014-10-28 13:31:01 打赏

12楼

用数组的形式显示显示数字+开关语句实现.，果然够狠！！！

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菜鸟

2014-10-29 00:06:53 打赏

13楼

脑袋不够用啦，有尝试，失败了，想上贴求助来着〒_〒

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菜鸟

2014-10-29 00:11:08 打赏

14楼

也想简洁点的，可是自己功底差，又没有努力去学，只能做到这样了，有空再想想怎么优化了〒_〒

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高工

2014-10-30 23:26:08 打赏

15楼

......

现在就是学的时候

还要等到啥时候？

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菜鸟

2014-11-05 23:41:32 打赏

16楼

来占个楼

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菜鸟

2014-11-07 09:57:43 打赏

17楼

本次作业没能按照老师的要求完成，数码管只能显示0~9，想要在数码管显示两位数时，十位数正确，个位数显示错误，一直都是显示8，比如当输入“data=29”时数码管显示的是 28 。

视频地址：http://player.youku.com/player.php/sid/XODIxMDU1MzM2/v.swf

先贴代码，请大神们指教。

#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;  

uint16_t Dis_tab[]={GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8,//0
	GPIO_Pin_9|GPIO_Pin_12,//1
	GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_5,//2
	GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_5,//3
	GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_8|GPIO_Pin_5,//4
	GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_8|GPIO_Pin_5,//5
	GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8|GPIO_Pin_5,//6
	GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12,//7
	GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14,//8
	GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14//9
	};
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()  
{  
  //GPIOB(数码管)初始化  
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);  //使能PB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;  //PC1--PC15
  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
} 
  
void USART_int(long BaudRate)  
{  
     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;//流控位none  
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接收和发送模式  
    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   
    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);//优先级  
  /* 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++);  
}  
/*delay_ms*/   
void  delay_ms(u32 n)  
{  
    while(n--)  
    delay_us(1000);  
}  
  
void USART_SendStr(char *str)//发送字符串  
{  
   while((*str)!='\0')//到字符串的末尾才停止发送数据  
    {     
        USART_SendData(USART1,*str++);  
        while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);  
    }  
}  
  
unsigned int translate(char *S,char j)//将字符串组成的数字转换成整型数据  
{  
    unsigned int a[2],i=0;  
    char c;  
    for(c=0;c<j;c++)  
    {  
        a[c]=S[5+j-1-c]-48;//将字符转成整型数据  
        i=a[c]*pow(10,c);//按照每一位的权值相乘再相加，还原data=n的本来面貌  
    }  
    return i;//i保存目标整型数据  
}   
  
void func(char *S,char LEN)  
{   
    char count;//  计数函数
    unsigned int i,c,j,k;  
    if((LEN!=6)&(LEN!=7))//data=0~99  
    {USART_SendStr("\r\n Erro input!!!\r\n");}//如果输入格式错误，发送提示  
    else   
    {  
        count=LEN-5;//从“=”后面开始是目标数据  
        i = translate(S,count);//count记录“=”后有多少位，传递到translate中  
       		
    
		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);	//关闭数码管 
		switch(LEN){  
         case 6 :   
             GPIO_SetBits(GPIOB,GPIO_Pin_1);  
             GPIO_ResetBits(GPIOB,Dis_tab[i%10]);  
				     GPIO_ResetBits(GPIOB,GPIO_Pin_15);//PB15 off
				 delay_ms(80);
         break;
						 
				 case 7 :
					             GPIO_SetBits(GPIOB,GPIO_Pin_15);//PB15 on  
                        GPIO_ResetBits(GPIOB,Dis_tab[i/10]);     
						delay_ms(20);
				                GPIO_ResetBits(GPIOB,GPIO_Pin_15);//PB15 off
				                GPIO_ResetBits(GPIOB,Dis_tab[i/10]);
				 delay_ms(2);
				                 
                         GPIO_SetBits(GPIOB,GPIO_Pin_1);//PB1  on  
                        GPIO_ResetBits(GPIOB,Dis_tab[i%10]);
					 delay_ms(20);
				                GPIO_ResetBits(GPIOB,GPIO_Pin_1);//PB1 off
						            GPIO_SetBits(GPIOB,Dis_tab[i%10]);  //off 
				  delay_ms(2);
				 
				 
				 
				 
				 
				 
            break;
				 
        }	    			
    }    
}    
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';}//判断读入信息是否结束，如果结束则准备下一次读入  
    USART_SendStr("\n>");  
}  
  
int main(void)  
{   
    RCC_Configuration();  
    GPIO_INIT();  
    USART_int(9600);   
    USART_SendStr("SyStem booting......\r\n");//   
    USART_SendStr("\n>");//   
    while(1)  
        {}  
}  
  
void USART1_IRQHandler(void)   
{   
  while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)  
  {  }   
    if(USART_ReceiveData(USART1)==0x0d)//如果输入完毕,按下了回车  
    {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);  
}

我不懂字符串转整型，是套用熙熙的……

可能是因为我强行套用才会出现错误吧……

unsigned int translate(char *S,char j)//将字符串组成的数字转换成整型数据  
{  
    unsigned int a[2],i=0;  
    char c;  
    for(c=0;c<j;c++)  
    {  
        a[c]=S[5+j-1-c]-48;//将字符转成整型数据  
        i=a[c]*pow(10,c);//按照每一位的权值相乘再相加，还原data=n的本来面貌  
    }  
    return i;//i保存目标整型数据  
}

在显示两位数时，是case7，我觉得这部分代码大体是正确的，不过闪现应该就是延时不对吧……大神们，求不鄙视……

case 7 :
		      GPIO_SetBits(GPIOB,GPIO_Pin_15);//PB15 on  
                        GPIO_ResetBits(GPIOB,Dis_tab[i/10]);     
		delay_ms(20);
		 GPIO_ResetBits(GPIOB,GPIO_Pin_15);//PB15 off
	        GPIO_ResetBits(GPIOB,Dis_tab[i/10]);
		 delay_ms(2);
		GPIO_SetBits(GPIOB,GPIO_Pin_1);//PB1  on  
                 GPIO_ResetBits(GPIOB,Dis_tab[i%10]);
		delay_ms(20);
		  GPIO_ResetBits(GPIOB,GPIO_Pin_1);//PB1 off
		 GPIO_SetBits(GPIOB,Dis_tab[i%10]);  //off 
		delay_ms(2);			 
            break;

接下来，我只能交作业了，头脑一片混乱，想不出来办法了，求指教

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高工

2014-11-12 11:44:06 打赏

18楼

把流程好好理一下

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菜鸟

2014-11-13 21:07:44 打赏

19楼

怎么理，不太能理解呢~~

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菜鸟

2014-11-26 09:38:50 打赏

20楼

视频地址：http://player.youku.com/player.php/sid/XODM1MjcwMzY0/v.swf

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_eval.h"
#include 
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; 
    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);
 
  /* 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);//使能时钟区
  
  /* 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);//使用PA8
  /* Enable AFIO clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  /* Connect EXTI0 Line to PA.00 pin */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);  //GPIOC.8 中断线以及中断初始化配置 下降沿触发
  /* 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);  //根据指定的参数初始化中断线的参数

  /* 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15
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;//子优先级15
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);//初始化
}
/**
  * @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_10;
  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);// GPIOC.9 中断线以及中断初始化配置 下降沿触发

  /* Configure EXTI9 line */
  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);

  /* 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 GPIOA clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//使能时钟区
  
   /* Configure PB.09 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  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_PinSource10);  //GPIOC.10 中断线以及中断初始化配置 下降沿触发

  /* Configure EXTI0 line */
  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);  //根据指定的参数初始化中断线的参数

  /* Enable and set EXTI0 Interrupt to the lowest priority */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;//使能按键所在的外部中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;//抢占优先级15
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;//子优先级15
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);//初始化
}
void EXTIkeyS4_Config(void)
{
  /* Enable GPIOA clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//使能时钟区
  
  /* Configure PB.09 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
  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_PinSource11);  //GPIOC.11 中断线以及中断初始化配置 下降沿触发

  /* 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);  //根据指定的参数初始化中断线的参数

  /* Enable and set EXTI0 Interrupt to the lowest priority */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;//使能按键所在的外部中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;//抢占优先级15
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;//子优先级15
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);//初始化
}
void EXTI9_5_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line9) != RESET)
  {
    /* Toggle LED2 */
     GPIO_SetBits(GPIOC,GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
printf("S2 interrupt ......\r\n");
    /* Clear the  EXTI line 9 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line9);
  }
	if(EXTI_GetITStatus(EXTI_Line8) != RESET)
  {
    /* Toggle LED1 */
     GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_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_Line10) != RESET)
  {
    /* Toggle LED2 */
     GPIO_ResetBits(GPIOC,GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
printf("S3 interrupt ......\r\n");
    /* Clear the  EXTI line 9 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line10);
  }
	if(EXTI_GetITStatus(EXTI_Line11) != RESET)
  {
    /* Toggle LED1 */
     GPIO_ResetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);
printf("S4 interrupt ......\r\n");
    /* Clear the  EXTI line 0 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line11);
  }
}
#ifdef  USE_FULL_ASSERT
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__ */
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)
{ 
  /* 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

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