BLE_ST-beacon串口中断收发

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添加串口中断请求

void SdkEvalComUartIrqConfig(FunctionalState EnableIrq)

添加中断接收处理函数
文件：BlueNRG1_it.c

void UART_Handler(void)
{  
  if (UART_GetITStatus(UART_IT_RX) != RESET)
  {
    /* Clear the interrupt */
    UART_ClearITPendingBit(UART_IT_RX);
    
    /* Echo of received data */
    UART_SendData((UART_ReceiveData() & 0xFF));
  }
}

此函数实现功能为，收到数据，立即通过串口发送出去