wiring_pulse.h

/*
  Copyright (c) 2011 Arduino.  All right reserved.
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
 
#ifndef _WIRING_PULSE_
#define _WIRING_PULSE_
 
#ifdef __cplusplus
  /*
  * \brief Measures the length (in microseconds) of a pulse on the pin; state is HIGH
  * or LOW, the type of pulse to measure.  Works on pulses from 2-3 microseconds
  * to 3 minutes in length, but must be called at least a few dozen microseconds
  * before the start of the pulse.
  */
  extern uint32_t pulseIn(uint32_t pin, uint32_t state, uint32_t timeout = 1000000L) ;
  extern uint32_t pulseInLong(uint32_t pin, uint32_t state, uint32_t timeout = 1000000L) ;
#endif
 
#endif /* _WIRING_PULSE_ */