text: //*****************************************************************************
  //! @file       bsp_key.h
  //! @brief      Key board support package header file.
  //!
  //! Revised     $Date: 2014-11-04 03:41:20 -0800 (Tue, 04 Nov 2014) $
  //! Revision    $Revision: 14353 $
  //
  //  Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
  //
  //
  //  Redistribution and use in source and binary forms, with or without
  //  modification, are permitted provided that the following conditions
  //  are met:
  //
  //    Redistributions of source code must retain the above copyright
  //    notice, this list of conditions and the following disclaimer.
  //
  //    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.
  //
  //    Neither the name of Texas Instruments Incorporated 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
  //  OWNER 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.
  //****************************************************************************/
  #ifndef __BSP_KEY_H__
  #define __BSP_KEY_H__
  
  
  /******************************************************************************
  * If building with a C++ compiler, make all of the definitions in this header
  * have a C binding.
  ******************************************************************************/
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  
  /******************************************************************************
  * INCLUDES
  */
  #include "bsp.h"                // Contains BSP key definitions
  #include "driverlib/gpio.h"     // Bitmask defines (e.g. GPIO_FALLING_EDGE)
  
  /******************************************************************************
  * DEFINES
  */
  #define BSP_KEY_MODE_POLL       0
  #define BSP_KEY_MODE_ISR        1
  
  
  //! Key events. Not all key events are necessarily used/available for all hw.
  enum {
  	BSP_KEY_EVT_NONE = 0,
  	BSP_KEY_EVT_UP,
      BSP_KEY_EVT_DOWN,
      BSP_KEY_EVT_LEFT,
      BSP_KEY_EVT_RIGHT,
      BSP_KEY_EVT_CENTER,
      BSP_KEY_EVT_PUSHED,
      BSP_KEY_EVT_SELECT
  };
  
  
  /******************************************************************************
  * FUNCTION PROTOTYPES
  */
  extern void bspKeyInit(uint32_t ui32Mode);
  extern uint32_t bspKeyPushed(uint32_t ui32ReadMask);
  extern uint32_t bspKeyGetDir(void);
  extern void bspKeyIntRegister(uint32_t ui32Keys, void (*pfnHandler)(void));
  extern void bspKeyIntUnregister(uint32_t ui32Keys);
  extern void bspKeyIntEnable(uint32_t ui32Keys);
  extern void bspKeyIntDisable(uint32_t ui32Keys);
  extern void bspKeyIntClear(uint32_t ui32Keys);
  
  
  /******************************************************************************
  * Mark the end of the C bindings section for C++ compilers.
  ******************************************************************************/
  #ifdef __cplusplus
  }
  #endif
  #endif /* #ifndef __BSP_KEY_H__ */
  