text: /*
   * Copyright (c) 2015, Devan Lai
   *
   * Permission to use, copy, modify, and/or distribute this software
   * for any purpose with or without fee is hereby granted, provided
   * that the above copyright notice and this permission notice
   * appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
   * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
   * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
   * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
   * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
   * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
   * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #ifndef TICK_H_INCLUDED
  #define TICK_H_INCLUDED
  
  extern bool tick_setup(uint32_t tick_freq_hz);
  extern void tick_start(void);
  extern void tick_stop(void);
  
  extern volatile uint32_t __ticks;
  
  extern uint32_t get_ticks(void);
  
  #endif
  