Bryce Williams / QEI

basic Quadrature Encoder Library

Dependents:   ESP8266_pid_mtrPos_webserver_SDcard_v2 ESP8266_pid_mtrSpeed_Webserver_SDcard ESP8266_pid_spd_and_pos_webserver_SDcard pid_encoder_speed_demo ... more

QEI.cpp

Committer:
electromotivated
Date:
2015-11-23
Revision:
0:50aae578cb89

File content as of revision 0:50aae578cb89:

#include "QEI.h"

QEI::QEI(PinName encA, PinName encB): _encA(encA), _encB(encB){
    _encA.mode(PullUp);
    _encA.rise(this, &QEI::callback);
    
    _encB.mode(PullUp);
}

long QEI::read(){
    return count;
}

void QEI::reset(){
    count = 0;
}

void QEI::callback(){
    if(_encB) count--;  // CCW count
    else count++;       // CW count    
}