syouichi imamori / PulseWidthCounter

positive or negative pulse width counter

Dependents:   test_hw_biniou

PulseCounter.cpp

Committer:
komaida424
Date:
2013-07-10
Revision:
0:89bd4ad6027d

File content as of revision 0:89bd4ad6027d:

#include "mbed.h"
#include "InterruptIn.h"
#include "PulseCounter.h"

PulseCounter::PulseCounter(PinName _interrupt,bool positive=true) : interrupt(_interrupt)     //constructa  
{
    if ( positive ) 
    {   interrupt.rise(this,&PulseCounter::start);
        interrupt.fall(this,&PulseCounter::stop);
    }
    else
    {   interrupt.fall(this,&PulseCounter::start);
        interrupt.rise(this,&PulseCounter::stop);
    }
}

void PulseCounter::start()
{
    _time.reset();
    _time.start();
}

void PulseCounter::stop()
{
    _time.stop();
    count = _time.read_us();
}