Thomas Raab / CRotaryEncoder

Handle rotary encoder connected to two pins. With interrupt. Operating encoder changes an int position value that can be polled.

Dependents:   encoder_test distance_measure speed_measure straight_speed_control ... more

CRotaryEncoder.cpp

Committer:
Raabinator
Date:
2010-11-09
Revision:
0:56f636261771

File content as of revision 0:56f636261771:

#include "mbed.h"
#include "CRotaryEncoder.h"

CRotaryEncoder::CRotaryEncoder(PinName pinA, PinName pinB)
{
    m_pinA = new InterruptIn(pinA);
    m_pinA->rise(this, &CRotaryEncoder::rise);
    m_pinA->fall(this, &CRotaryEncoder::fall);

    m_pinB = new DigitalIn(pinB);
    m_position = 0;
}

CRotaryEncoder::~CRotaryEncoder()
{
    delete m_pinA;
    delete m_pinB;
}
 
int CRotaryEncoder::Get(void)
{
    return m_position;
}

void CRotaryEncoder::Set(int value)
{
    m_position = value;
}

    
void CRotaryEncoder::fall(void)
{
        if(*m_pinB == 1)
        {
            m_position++;
        }
        else
        {
            m_position--;
        }
}

void CRotaryEncoder::rise(void)
{
        if(*m_pinB == 1)
        {
            m_position--;
        }
        else
        {
            m_position++;
        }
}