Bryce Williams / QEI

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Show/hide line numbers QEI.cpp Source File

QEI.cpp

00001 #include "QEI.h"
00002 
00003 QEI::QEI(PinName encA, PinName encB): _encA(encA), _encB(encB){
00004     _encA.mode(PullUp);
00005     _encA.rise(this, &QEI::callback);
00006     
00007     _encB.mode(PullUp);
00008 }
00009 
00010 long QEI::read(){
00011     return count;
00012 }
00013 
00014 void QEI::reset(){
00015     count = 0;
00016 }
00017 
00018 void QEI::callback(){
00019     if(_encB) count--;  // CCW count
00020     else count++;       // CW count    
00021 }
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