STM32串口清中断后下次再接收数据会不会再次进入中断  我调试的是不能 必须复位才能接收新的数据  请问大家有知道怎么回事吗？ 代码如下： /* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
 
/* Private functions ---------------------------------------------------------*/ /*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif   /* System Clocks Configuration */
  RCC_Configuration();
      
  /* NVIC configuration */
  NVIC_Configuration();   /* Configure the GPIO ports */
  GPIO_Configuration();   /* USART1 configured as follow:
        - BaudRate = 9600 baud 
        - Word Length = 8 Bits
        - Two Stop Bit
        - Odd parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
        - USART Clock disabled
        - USART CPOL: Clock is active low
        - USART CPHA: Data is captured on the second edge
        - USART LastBit: The clock pulse of the last data bit is not output to
                         the SCLK pin
  */
  GPIO_PinRemapConfig(GPIO_Remap_USART1,ENABLE);
  /*AFIO->MAPR|=(uint32_t)0x04;*/   // clear USART1 remap
  USART_InitStructure.USART_BaudRate = 9600;
  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;  //禁用USART时钟 时钟低电平活动
  USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;   //时钟极性，数据低电平有效
  USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;  //外部时钟相位，数据在第二个时钟捕捉
  USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;  //禁用最后一位，最后数据位的时钟脉冲不输出到SCLK引脚   /* Configure the USART1 */
  USART_Init(USART1, &USART_InitStructure);
 
  USART_ClockInit(USART1,&USART_ClockInitStructure);
/* Enable the USART Transmoit interrupt: this interrupt is generated when the
   USART1 transmit data register is empty */ 
  USART_ITConfig(USART1, USART_IT_TXE, ENABLE); /* Enable the USART Receive interrupt: this interrupt is generated when the
   USART1 receive data register is not empty */
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);   /* Enable USART1 */
  USART_Cmd(USART1, ENABLE);   while(1)
  {  
  }
} /*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{                
  /* RCC system reset(for debug purpose)将RCC寄存器从新设置为默认值 */
  RCC_DeInit();    /* Enable HSE 打开外部高速时钟晶振*/
  RCC_HSEConfig(RCC_HSE_ON);   /* Wait till HSE is ready 等待外部高速时钟晶振工作*/
  HSEStartUpStatus = RCC_WaitForHSEStartUp();   if(HSEStartUpStatus == SUCCESS)
  { 
    /* HCLK = SYSCLK 设置AHB时钟 设置高速总线时钟=系统时钟*/
    RCC_HCLKConfig(RCC_SYSCLK_Div1);
 
    /* PCLK2 = HCLK  设置高速AHB时钟 设置低速总线2时钟=高速总线时钟*/
    RCC_PCLK2Config(RCC_HCLK_Div1);     /* PCLK1 = HCLK/2 设置低速AHB时钟 设置低速总线1时钟=高速时钟的二分频*/
    RCC_PCLK1Config(RCC_HCLK_Div2);     /* Flash 2 wait state 令Flash处于等待状态，2是针对高频时钟的*/
    FLASH_SetLatency(FLASH_Latency_2);
    /* Enable Prefetch Buffer 使能flash预读取缓冲区*/
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);     /* PLLCLK = 8MHz * 9 = 72 MHz 利用锁相环将外部8MHz晶振9倍频到72MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);     /* Enable PLL 使能锁相环 */
    RCC_PLLCmd(ENABLE);     /* Wait till PLL is ready 等待锁相环输出稳定*/
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }     /* Select PLL as system clock source 将锁相环输出设置为系统时钟*/
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);     /* Wait till PLL is used as system clock source 判断PLL是否是系统时钟*/
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }
 
  /* Enable GPIOA and USART1 clocks 使能外围接口总线时钟，开串口时钟*/
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_USART1| RCC_APB2Periph_AFIO, ENABLE); } /*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;   /* Configure USART1 Tx (PB6) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);   /* Configure USART1 Rx (PB7) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
 
 
} /*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures the nested vectored interrupt controller.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure; #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;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}       中断处理函数是：void USART1_IRQHandler(void)
{
  if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
  {
    /* Read one byte from the receive data register */
 RxBuffer[RxCounter++] = (USART_ReceiveData(USART1) & 0x7F);
           
    /* Clear the USART1 Receive interrupt */
    USART_ClearITPendingBit(USART1, USART_IT_RXNE);     if(RxCounter == NbrOfDataToRead)
    { 
      /* Disable the USART Receive interrupt */
      USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
   USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
   TxCounter=0;
   p = RxBuffer;
    }
  }   if(USART_GetITStatus(USART1, USART_IT_TXE) == SET)
  {  
    /* Write one byte to the transmit data register */
    USART_SendData(USART1, p[TxCounter++]);
 while(USART_GetFlagStatus(USART1, USART_IT_TXE)==RESET)                      /* Clear the USART1 transmit interrupt */
    USART_ClearITPendingBit(USART1, USART_IT_TC);     if(p==TxBuffer&&TxCounter == NbrOfDataToTransfer)
    {
      /* Disable the USART1 Transmit interrupt */
      USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
    } 
 if(p==RxBuffer&&TxCounter==RxCounter)
 {
      /* Disable the USART1 Transmit interrupt */
      USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
 }
  }
    if(USART_GetFlagStatus(USART1,USART_FLAG_ORE)==SET)
    {
        USART_ClearFlag(USART1,USART_FLAG_ORE);    //清溢出位
        USART_ReceiveData(USART1);                //读DR
    } 
}
    已经清楚中断标志位了，为什么发送新的数据时不能覆盖掉以前的数据？ 此帖出自小平头技术问答