/**

　　******************************************************************************

　　* File Name ： gpio.h

　　* Description ： This file contains all the functions prototypes for

　　* the gpio

　　******************************************************************************

　　** This notice applies to any and all portions of this file

　　* that are not between comment pairs USER CODE BEGIN and

　　* USER CODE END. Other portions of this file， whether

　　* inserted by the user or by software development tools

　　* are owned by their respective copyright owners.

　　*

　　* COPYRIGHT（c） 2017 STMicroelectronics

　　*

　　* Redistribution and use in source and binary forms， with or without modification，

　　* are permitted provided that the following conditions are met：

　　* 1. Redistributions of source code must retain the above copyright notice，

　　* this list of conditions and the following disclaimer.

　　* 2. Redistributions in binary form must reproduce the above copyright notice，

　　* this list of conditions and the following disclaimer in the documentation

　　* and/or other materials provided with the distribution.

　　* 3. Neither the name of STMicroelectronics nor the names of its contributors

　　* may be used to endorse or promote products derived from this software

　　* without specific prior written permission.

　　*

　　* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”

　　* AND ANY EXPRESS OR IMPLIED WARRANTIES， INCLUDING， BUT NOT LIMITED TO， THE

　　* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

　　* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

　　* FOR ANY DIRECT， INDIRECT， INCIDENTAL， SPECIAL， EXEMPLARY， OR CONSEQUENTIAL

　　* DAMAGES （INCLUDING， BUT NOT LIMITED TO， PROCUREMENT OF SUBSTITUTE GOODS OR

　　* SERVICES; LOSS OF USE， DATA， OR PROFITS; OR BUSINESS INTERRUPTION） HOWEVER

　　* CAUSED AND ON ANY THEORY OF LIABILITY， WHETHER IN CONTRACT， STRICT LIABILITY，

　　* OR TORT （INCLUDING NEGLIGENCE OR OTHERWISE） ARISING IN ANY WAY OUT OF THE USE

　　* OF THIS SOFTWARE， EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

　　*

　　******************************************************************************