text: //*****************************************************************************
  //
  // systick.h - Prototypes for the SysTick driver.
  //
  // Copyright (c) 2005-2014 Texas Instruments Incorporated.  All rights reserved.
  // Software License Agreement
  // 
  //   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.
  // 
  // This is part of revision 2.1.0.12573 of the Tiva Peripheral Driver Library.
  //
  //*****************************************************************************
  
  #ifndef __DRIVERLIB_SYSTICK_H__
  #define __DRIVERLIB_SYSTICK_H__
  
  //*****************************************************************************
  //
  // If building with a C++ compiler, make all of the definitions in this header
  // have a C binding.
  //
  //*****************************************************************************
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  //*****************************************************************************
  //
  // Prototypes for the APIs.
  //
  //*****************************************************************************
  extern void SysTickEnable(void);
  extern void SysTickDisable(void);
  extern void SysTickIntRegister(void (*pfnHandler)(void));
  extern void SysTickIntUnregister(void);
  extern void SysTickIntEnable(void);
  extern void SysTickIntDisable(void);
  extern void SysTickPeriodSet(uint32_t ui32Period);
  extern uint32_t SysTickPeriodGet(void);
  extern uint32_t SysTickValueGet(void);
  
  //*****************************************************************************
  //
  // Mark the end of the C bindings section for C++ compilers.
  //
  //*****************************************************************************
  #ifdef __cplusplus
  }
  #endif
  
  #endif // __DRIVERLIB_SYSTICK_H__
  