Reference for Wiring version 0024+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Class

Encoder
Name

attach()
Examples 
#include "Encoder.h"

Encoder myEncoder;

void setup() {
  myEncoder.attach(2, 8);  // attaches a encoder with phaseA connected to pin 2 and phaseB connected to pin 8
}

void loop() {
  myEncoder.write(0);     // position the encoder angle at 0 
}
#include "Encoder.h"

Encoder myEncoder;
Encoder mySecondEncoder;

void setup() {
  myEncoder.attach(2, 8);         // attaches an encoder with phaseA connected to pin 2 and phaseB connected to pin 8
  mySecondEncoder.attach(3, 15);  // attaches an encoder with phaseA connected to pin 3 and phaseB connected to pin 15
}

void loop() {
  myEncoder.write(myencoder, 0); // position the encoder angle at 0 
  mySecondEncoder.write(100);    // position the encoder angle at 100 
}
Description The Wiring encoder library provides for 4 encoder channels, so it can drive up to 4 encoders at a time. The encoder's phaseA cable can be connected to digital I/O pins 2, 3, 38 or 39 exclusively, on the Wiring I/O board. This is because the library is based on external interruptions which can only happen on these specific pins. The phaseB cable can be connected to any other digital I/O pin of the Wiring I/O board. The attach(phaseAPin, phaseBPin) method attaches an Encoder variable to the pins where the encoder is connected.
Syntax 
encoder.attach(pinA, pinB)
Parameters
pinA Encoder phase A pin, it can be 2, 3, 38 or 39
pinB Encoder phase B pin, it can be any Wiring pin
encoder The Encoder variable.
Returns None
Usage Application
Updated on October 31, 2009 01:47:43pm PDT

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