hey i made a servo move by moving an encoder, havent seen a decent tutorial on how to do it so this is how i made it
/* Read Quadrature Encoder
* Connect Encoder to Pins encoder0PinA, encoder0PinB, and +5V.
*
* Sketch by max wolf / www.meso.net
* v. 0.1 - very basic functions - mw 20061220
*
*/
#include <Servo.h>
Servo myservo;
int servoPin = 13;
//From bildr article: http://bildr.org/2012/08/rotary-encoder-arduino/
int delayPeriod = 3;
//these pins can not be changed 2/3 are special pins
int encoderPin1 = 2;
int encoderPin2 = 3;
volatile int lastEncoded = 0;
volatile long encoderValue = 0;
long lastencoderValue = 0;
int lastMSB = 0;
int lastLSB = 0;
void setup() {
Serial.begin (9600);
myservo.attach (13);
pinMode(servoPin, OUTPUT);
pinMode(encoderPin1, INPUT);
pinMode(encoderPin2, INPUT);
digitalWrite(encoderPin1, HIGH); //turn pullup resistor on
digitalWrite(encoderPin2, HIGH); //turn pullup resistor on
//call updateEncoder() when any high/low changed seen
//on interrupt 0 (pin 2), or interrupt 1 (pin 3)
attachInterrupt(0, updateEncoder, CHANGE);
attachInterrupt(1, updateEncoder, CHANGE);
}
void loop(){
//Do stuff here
Serial.println(encoderValue);
}
void updateEncoder(){
int MSB = digitalRead(encoderPin1); //MSB = most significant bit
int LSB = digitalRead(encoderPin2); //LSB = least significant bit
int encoded = (MSB << 1) |LSB; //converting the 2 pin value to single number
int sum = (lastEncoded << 2) | encoded; //adding it to the previous encoded value
if(sum == 0b1101 || sum == 0b0100 || sum == 0b0010 || sum == 0b1011) encoderValue ++;
if(sum == 0b1110 || sum == 0b0111 || sum == 0b0001 || sum == 0b1000) encoderValue --;
lastEncoded = encoded; //store this value for next time
// in steps of 1 degree
if( encoderValue > 0){
--encoderValue;
myservo.write(encoderValue); // tell servo to go to position in variable 'pos'
delay(delayPeriod);
}
if( encoderValue < 180){
++encoderValue;
myservo.write(encoderValue); // tell servo to go to position in variable 'pos'
delay(delayPeriod);
}
}