text: //*****************************************************************************
  //
  // io.h - Prototypes for I/O routines for the enet_io example.
  //
  // Copyright (c) 2009-2014 Texas Instruments Incorporated.  All rights reserved.
  // Software License Agreement
  // 
  // Texas Instruments (TI) is supplying this software for use solely and
  // exclusively on TI's microcontroller products. The software is owned by
  // TI and/or its suppliers, and is protected under applicable copyright
  // laws. You may not combine this software with "viral" open-source
  // software in order to form a larger program.
  // 
  // THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
  // NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
  // NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
  // CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
  // DAMAGES, FOR ANY REASON WHATSOEVER.
  // 
  // This is part of revision 2.1.0.12573 of the DK-TM4C129X Firmware Package.
  //
  //*****************************************************************************
  
  #ifndef __IO_H__
  #define __IO_H__
  
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  //*****************************************************************************
  //
  // Exported global variables.
  //
  //*****************************************************************************
  extern volatile unsigned long g_ulAnimSpeed;
  
  //*****************************************************************************
  //
  // Exported function prototypes.
  //
  //*****************************************************************************
  void io_init(void);
  void io_set_led(bool bOn);
  void io_get_ledstate(char *pcBuf, int iBufLen);
  void io_set_animation_speed_string(char *pcBuf);
  void io_get_animation_speed_string(char *pcBuf, int iBufLen);
  void io_set_animation_speed(unsigned long ulSpeedPercent);
  unsigned long io_get_animation_speed(void);
  int io_is_led_on(void);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif // __IO_H__
  