stm32，串口2无法正常收发数据。中断方式。

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串口1可以正常收发，我的是stm32f107vc，金牛的板子。
下面是我的代码段：
//中断处理程序段：
void USART1_IRQHandler(void)

{

u8 c;

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)

{

//   RxBuffer[RxCounter++]=USART1->DR;

flag = flag ^ 1;

if(flag)

GPIO_SetBits(GPIOD, GPIO_Pin_3);

else

    GPIO_ResetBits(GPIOD, GPIO_Pin_3);

c=USART1->DR;

UART1_SendByte(c);    

UART2_SendByte(c);  

UART3_SendByte(c);  

} 

 

}

void USART2_IRQHandler(void)

{

u8 c;

if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)

{

//   RxBuffer[RxCounter++]=USART1->DR;

flag = flag ^ 1;

if(flag)

GPIO_SetBits(GPIOD, GPIO_Pin_3);

else

    GPIO_ResetBits(GPIOD, GPIO_Pin_3);

c=USART2->DR;

UART1_SendByte(c);    

UART2_SendByte(c);  

UART3_SendByte(c);  

} 

 

}
//相关初始化：

void GPIO_Configuration(void)

{

  GPIO_InitTypeDef  GPIO_InitStructure;

/* Configure IO connected to LD1, LD2, LD3 and LD4 leds *********************/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_7;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

   /* Enable USART1 and GPIOA clock                                            */

  RCC_APB2PeriphClockCmd (RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB , ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3 | RCC_APB1Periph_USART2, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);

  /* Configure USART1 Rx (PA10) as input floating                             */

  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_10;

  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure USART1 Tx (PA9) as alternate function push-pull                */

  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);

   /* Configure USART2 Rx (PA3) as input floating                             */

  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_6;

  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure USART2 Tx (PA2) as alternate function push-pull                */

  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_5;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

   /* Configure USART3 Rx (PB11) as input floating                             */

  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Configure USART3 Tx (PB10) as alternate function push-pull                */

  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_10;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

}

//系统中断管理

void NVIC_Configuration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure; 

  /* Configure the NVIC Preemption Priority Bits */  

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

  

  /* Enable the USARTy Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}

//配置系统时钟,使能各外设时钟

void RCC_Configuration(void)

{

SystemInit();

 RCC_APB2PeriphClockCmd (RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB , ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3 | RCC_APB1Periph_USART2, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);

// RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA 

//                            |RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC

//                            |RCC_APB2Periph_GPIOD | RCC_APB2Periph_ADC1

//                            | RCC_APB2Periph_AFIO |

//                            RCC_APB2Periph_SPI1, ENABLE );

//   // RCC_APB2PeriphClockCmd(RCC_APB2Periph_ALL ,ENABLE );

//      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4 |RCC_APB1Periph_USART2

//                            |RCC_APB1Periph_USART3|RCC_APB1Periph_TIM2                           

//                            , ENABLE );

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

}

正点原子

波特率设置的问题吧?

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回复【2楼】正点原子:
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//已经调用相关的设置。。。
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate            = 115200  ;
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(USART1, &USART_InitStructure);
USART_Init(USART2, &USART_InitStructure);
USART_Init(USART3, &USART_InitStructure);

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

USART_Cmd(USART1, ENABLE);     
USART_Cmd(USART2, ENABLE);     
USART_Cmd(USART3, ENABLE);

正点原子

附上工程吧,我帮你看下.

top_dada

回复【4楼】正点原子:
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工程在另一个帖子中了，谢谢。。