rotary-mouse.ino

#include "HID-Project.h"

#define maxMoveAmt  1
#define encoder0PinA 2
#define encoder0PinB 3
#define encoder0Button 4

volatile unsigned int encoder0Pos = 0;
unsigned int tmp_Pos = 1;
unsigned int valx;
unsigned int valy;
unsigned int valz;

boolean A_set;
boolean B_set;

boolean encPosi;

// the current state of the output pin
int encButtonState = HIGH;
// the current reading from the input pin
int buttonState;
// the previous reading from the input pin
int lastButtonState = LOW;

/*
    the following variables are long's because the time, measured in miliseconds,
    will quickly become a bigger number that can't be stored as an int.
*/
// the last time the output pin was toggled
long lastDebounceTime = 0;
// the debounce time; increase if the output flickers
long debounceDelay = 60;

void setup() {
  pinMode(encoder0Button, INPUT);
  digitalWrite(encoder0Button, HIGH);
  pinMode(encoder0PinA, INPUT);
  pinMode(encoder0PinB, INPUT);
  // encoder pin on interrupt 0 (pin 2)
  attachInterrupt(0, doEncoderA, CHANGE);
  // encoder pin on interrupt 1 (pin 3)
  attachInterrupt(1, doEncoderB, CHANGE);
  Serial.begin(115200);
}


void loop() {
  // read the state of the switch into a local variable:
  int reading = digitalRead(encoder0Button);

  // check to see if you just pressed the button
  // (i.e. the input went from LOW to HIGH),  and you've waited
  // long enough since the last press to ignore any noise:

  // If the button changed, due to noise:
  if (reading != lastButtonState) {
    // reset the debouncing timer
    lastDebounceTime = millis();

    if (buttonState == HIGH) {
      encButtonState = !encButtonState;
    }
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    // whatever the reading is at, it's been there for longer
    // than the debounce delay, so take it as the actual current state:
    buttonState = reading;
  }

  // set the LED using the state of the button:
  /*if (encButtonState == 0) {
    Serial.println("HIGH");
    } else {
    Serial.println("LOW");
    }*/

  // save the reading.  Next time through the loop,
  // it'll be the lastButtonState:
  lastButtonState = reading;

  //Check each second for change in position
  if (tmp_Pos != encoder0Pos) {
    if (encPosi == true) {
      if (digitalRead(encoder0Button) == 0) {
        Mouse.click(2);
        Serial.println("THROW-R");
      } else {
        if (encButtonState == true) {
          Mouse.move(0, maxMoveAmt);
          Serial.println("Down");
        } else {
          Mouse.move(maxMoveAmt, 0);
          Serial.println("Right");
        }
      }
    } else {
      if (digitalRead(encoder0Button) == 0) {
        Mouse.click(1);
        Serial.println("THROW-L");
      } else {
        if (encButtonState == false) {
          Mouse.move(-maxMoveAmt, 0);
          Serial.println("Left");
        } else {
          Mouse.move(0, -maxMoveAmt);
          Serial.println("Up");
        }
      }
    }
    //Serial.println(encoder0Pos, DEC);
    tmp_Pos = encoder0Pos;
  }
}


// Interrupt on A changing state
void doEncoderA() {
  // Low to High transition?
  if (digitalRead(encoder0PinA) == HIGH) {
    A_set = true;
    if (!B_set) {
      encoder0Pos = encoder0Pos + 1;
      valx = analogRead(0);
      valy = analogRead(1);
      valz = analogRead(2);
    }
  }

  // High-to-low transition?
  if (digitalRead(encoder0PinA) == LOW) {
    A_set = false;
  }
  encPosi = true;
}

// Interrupt on B changing state
void doEncoderB() {
  // Low-to-high transition?
  if (digitalRead(encoder0PinB) == HIGH) {
    B_set = true;
    if (!A_set) {
      encoder0Pos = encoder0Pos - 1;
    }
  }

  // High-to-low transition?
  if (digitalRead(encoder0PinB) == LOW) {
    B_set = false;
  }
  encPosi = false;
}

Final update(probably)! - Adds full mouse control(minus scrolling)

Turning the encoder left or right will move the current axis.
Clicking the rotary encoder's internal button will change the axis.
Clicking and holding the internal button and rotating left or right will perform a left or right click!

TODO: Hopefully add EEPROM memory storage so that the last axis(before a reflash/reset/power cycle) will remain in memory.