串口3为什么不工作请各位高手帮我看看，谢谢

zc57520

代码如下：
#if 1

#pragma import(__use_no_semihosting)                           

struct __FILE 

{ 

int handle; 

}; 

FILE __stdout;       

_sys_exit(int x) 

{ 

x = x; 

} 

int fputc(int ch, FILE *f)

{      

while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET); 

    USART_SendData(USART3,(uint8_t)ch);   

return ch;

}

#endif 

 /* 

int fputc(int ch, FILE *f)

{

USART_SendData(USART1, (uint8_t) ch);

while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}

   

    return ch;

}

int GetKey (void)  { 

    while (!(USART1->SR & USART_FLAG_RXNE));

    return ((int)(USART1->DR & 0x1FF));

}

*/

 

void uart_init(u32 bound){

  

    GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

 

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

  USART_DeInit(USART3); 

//USART1_TX   PA.9

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PA.9

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

    GPIO_Init(GPIOB, &GPIO_InitStructure); 

   

    //USART1_RX  A.10

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

    GPIO_Init(GPIOB, &GPIO_InitStructure);  

   //USART ???????è??

USART_InitStructure.USART_BaudRate = bound;

USART_InitStructure.USART_WordLength = USART_WordLength_8b;

USART_InitStructure.USART_StopBits = USART_StopBits_1;

USART_InitStructure.USART_Parity = USART_Parity_No;

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

    USART_Init(USART3, &USART_InitStructure);

#if EN_USART3_RX

 

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

   

    USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

#endif

    USART_Cmd(USART3, ENABLE);                  

}

void USART1_IRQHandler(void)                

{

u8 Res;

#ifdef OS_TICKS_PER_SEC

OSIntEnter();    

#endif

if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)  

{

Res =USART_ReceiveData(USART3);//(USART1->DR);

if((USART_RX_STA&0x8000)==0)

{

if(USART_RX_STA&0x4000)

{

if(Res!=0x0a)USART_RX_STA=0;

else USART_RX_STA|=0x8000;

}

else 

{

if(Res==0x0d)USART_RX_STA|=0x4000;

else

{

USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;

USART_RX_STA++;

if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;  

}  

}

}    

     } 

#ifdef OS_TICKS_PER_SEC

OSIntExit();    

#endif

} 

#endif

int main()

{

u8 len,i;

delay_init();

uart_init(9600);

NVIC_Configuration();

while(1)

{

if(USART_RX_STA&0x8000)

{

len=USART_RX_STA&0x3fff;

for(i=0;i<len;i++)

{

USART_SendData(USART3,USART_RX_BUF);

while(USART_GetFlagStatus(USART3,USART_FLAG_TC)!=1);

}

USART_RX_STA=0;

}

}

}

dzng11

void USART1_IRQHandler(void)        这个是串口一的函数啊

zc57520

回复【2楼】dzng11:
---------------------------------
这不只是一个名字吗？函数里面的参数我改了

xjsok

void USART1_IRQHandler(void) ，这不只是一个名字吗？函数里面的参数我改了

中断函数，可不是一般的名，改过来试试！？

dzng11

回复【3楼】zc57520:

回复【2楼】dzng11:
---------------------------------
这不只是一个名字吗？函数里面的参数我改了

---------------------------------
对于stm32来说，就不一样了。这个函数是在启动文件里搞死了的，你改成其他名字就不会响应了

zc57520

回复【5楼】dzng11:
---------------------------------
谢谢，你是对的，我改过了，现在正常了

zc57520

回复【4楼】xjsok:
---------------------------------
谢谢，你是对的，我改过了，现在正常了

haoyun1243

请问你串口3怎么连的线  我用引出IO口的PB10和11，连P6的RXD和TXD怎么下载时显示无话连接芯片？