这里写代码片
void UART_Initializes(void)
{
  UART1_Init((uint32_t)115200, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO, UART1_SYNCMODE_CLOCK_DISABLE, UART1_MODE_TXRX_ENABLE);
  UART1_Cmd(ENABLE);
  UART1_ITConfig(UART1_IT_RXNE_OR, ENABLE)
  enableInterrupts();
}
void UART1_SendData8(uint8_t Data)
{
  /* Transmit Data */
  UART1->DR = Data;
}
void UART1_SendByte(uint8_t Data)
{
  while((UART1_GetFlagStatus(UART1_FLAG_TXE)==RESET));
  UART1_SendData8(Data);
  while((UART1_GetFlagStatus(UART1_FLAG_TC)==RESET));
}
uint8_t UART1_ReceiveData8(void)
{
  return ((uint8_t)UART1->DR);
}
#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
    defined(STM8S003) ||  defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8S903)
/**
  * @brief UART1 TX Interrupt routine.
  * @param  None
  * @retval None
  */
 INTERRUPT_HANDLER(UART1_TX_IRQHandler, 17)
 {
    /* In order to detect unexpected events during development,
       it is recommended to set a breakpoint on the following instruction.
    */
 }

/**
  * @brief UART1 RX Interrupt routine.
  * @param  None
  * @retval None
  */
INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18)
{
  uint8_t temp;

  temp = UART1_ReceiveData8();                   //读取接收到的数据(该操作会自动清除中断接收标志)
  UART1_SendData8(7);                         //发送接收到的数据
}

#endif