Usart的单线半双工模式（stm32F10x系列）

int main(void)
{
    usart_Configuration();    

  while(NbrOfDataToRead2--)
  {
    /* Wait until end of transmit */
    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
    {

    }
    /* Write one byte in the USARTy Transmit Data Register */
    
    USART_SendData(USART1, TxBuffer1[TxCounter1++]);
    //    GPIO_SetBits(GPIOB,GPIO_Pin_0);    
    /* Wait the byte is entirely received by USARTz */  
    while(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET)
    {
    }
    /* Store the received byte in the RxBuffer2 */
    RxBuffer2[RxCounter2++] = USART_ReceiveData(USART2);
    //GPIO_SetBits(GPIOB,GPIO_Pin_0);
  }
   USART_ReceiveData(USART1);
  while(NbrOfDataToRead1--)
  { 
    /* Wait until end of transmit */
    while(USART_GetFlagStatus(USART2, USART_FLAG_TXE)== RESET)
    {
    }
    /* Write one byte in the USARTz Transmit Data Register */
    USART_SendData(USART2, TxBuffer2[TxCounter2++]);

    /* Wait the byte is entirely received by USARTy */
    while(USART_GetFlagStatus(USART1,USART_FLAG_RXNE) == RESET)
    {
    }
    /* Store the received byte in the RxBuffer1 */
    RxBuffer1[RxCounter1++] = USART_ReceiveData(USART1);
  }


    /* Check the received data with the send ones */
  TransferStatus1 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
  if(TransferStatus1)
  {GPIO_SetBits(GPIOB,GPIO_Pin_0);}
  /* TransferStatus = PASSED, if the data transmitted from USARTy and  
     received by USARTz are the same */
  /* TransferStatus = FAILED, if the data transmitted from USARTy and 
     received by USARTz are different */
  TransferStatus2 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
    if(TransferStatus2)
  {GPIO_SetBits(GPIOB,GPIO_Pin_1);}
  while (1)
  {
  }


//IO配置部分
void Rcc_Configuration(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
}

void UsartGPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
    GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);
    
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;             
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  
    GPIO_Init(GPIOB, &GPIO_InitStructure);  //Tx1         
    
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;            
    //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; 
    GPIO_Init(GPIOD, &GPIO_InitStructure);//Tx2

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);      //PB0---LED0
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_Init(GPIOB, &GPIO_InitStructure);      //PB1---LED1s

}

void usart_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;

    Rcc_Configuration();
    
    UsartGPIO_Configuration();

    USART_InitStructure.USART_BaudRate = 230400;
    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_HalfDuplexCmd(USART1,ENABLE);
    USART_HalfDuplexCmd(USART2,ENABLE);
    
    USART_Cmd(USART1, ENABLE);
    USART_Cmd(USART2, ENABLE);
}