text: /*
   * File      : drv_usart.h
   * Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
   *
   * SPDX-License-Identifier: Apache-2.0
   *
   * Change Logs:
   * Date           Author        Notes
   * 2019-01-23     wangyq        the first version
   */
  
  #ifndef DRV_USART_H__
  #define DRV_USART_H__
  
  int rt_hw_usart_init(void);
  
  #endif
  