串口1可以正常通信而串口2不行，可以排除硬件问题，但没发现哪有问题，求指点

irishehe

main函数中：
{

NVIC_Configuration();//by iris 2013.6.3 //串口中断

/*初始化串口*/

    USART1_Config();  

。。。
}

void NVIC_Configuration(void)

{ 

 NVIC_InitTypeDef NVIC_InitStructure;

 /* Configure the NVIC Preemption Priority Bits */  

//   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

#ifdef  VECT_TAB_RAM  

 /* Set the Vector Table base location at 0x20000000 */ 

 NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); 

#else  /* VECT_TAB_FLASH  */

 /* Set the Vector Table base location at 0x08000000 */ 

 NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   

#endif

  /* Enable the USART1 Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;   //通道设置为串口1中断（故后面应选择在“void USART1_IRQHandler(void)”开中断）

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;    //中断占先等级0

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;          //中断响应优先级0

  NVIC_InitStructure.NVIC_IRQChannelCmd = F_ENABLE;           //打开中断

  NVIC_Init(&NVIC_InitStructure);

  /* Enable the USART2 Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;   //通道设置为串口2中断（故后面应选择在“void USART2_IRQHandler(void)”开中断）

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;    //中断占先等级0

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;          //中断响应优先级0

  NVIC_InitStructure.NVIC_IRQChannelCmd = F_ENABLE;           //打开中断

  NVIC_Init(&NVIC_InitStructure);

}

void USART1_Config(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

/* config USART1 clock */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB1Periph_USART2 | RCC_APB2Periph_GPIOA, F_ENABLE);

/* config USART2 clock */

// RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2, F_ENABLE);  //by iris 2013.6.12

/* USART1 GPIO config */

/* Configure USART1 Tx (PA.09) as alternate function push-pull */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);    

/* Configure USART1 Rx (PA.10) as input floating */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* Configure USART2 Tx (PA.02) as alternate function push-pull */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

    

  /* Configure USART2 Rx (PA.03) as input floating */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

 

/* USART1 mode config */

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_ITConfig(USART1, USART_IT_RXNE, F_ENABLE);

USART_Cmd(USART1, F_ENABLE);

/* USART2 mode config */

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(USART2, &USART_InitStructure);

USART_ITConfig(USART2, USART_IT_RXNE, F_ENABLE);

USART_Cmd(USART2, F_ENABLE);     

}

void USART1_IRQHandler(void)

{

u8 c;

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

{

   c=USART1->DR;

USART1_SendByte(c);

} 

 

}

void USART2_IRQHandler(void)

{

u8 c;

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

{

   c=USART2->DR;

USART2_SendByte(c);

    

} 

 

}

void USART1_SendByte(u16 Data)

{ 

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

   USART1->DR = (Data & (uint16_t)0x01FF);  

   

}

void USART2_SendByte(u16 Data)

{ 

   while (!(USART2->SR & USART_FLAG_TXE));

   USART2->DR = (Data & (uint16_t)0x01FF);  

   

}

冰是睡着的水

回复【楼主位】irishehe:
---------------------------------
串口2的时钟没有开，你开错了！

ST-FAE-SALE

/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB1Periph_USART2 | RCC_APB2Periph_GPIOA, F_ENABLE);
/* config USART2 clock */
// RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2, F_ENABLE);  //by iris 2013.6.12
APB1只能对应到APB1，APB2也只能对应到APB1。不能任意调换的呀！

Admin

回复【3楼】ST-FAE-SALE:
---------------------------------
正解。

ST-FAE-SALE

回复【4楼】Admin:
---------------------------------
哈哈，站长，客气，客气

irishehe

回复【2楼】冰是睡着的水:
---------------------------------
谢谢咯 嘿嘿

irishehe

回复【4楼】Admin:
---------------------------------
O(∩_∩)O谢谢咯

irishehe

回复【3楼】ST-FAE-SALE:
---------------------------------
太感谢您的耐心指点了 谢谢O(∩_∩)O~

irishehe

回复【4楼】Admin:
---------------------------------
谢谢站长 O(∩_∩)O~