VMA435
V. 01 – 13/04/2018
4
©Velleman nv
*** CODE BEGIN ***
int pinA = 3; // Connected to CLK
int pinB = 4; // Connected to DT
int encoderPosCount = 0;
int pinALast;
int aVal;
boolean bCW;
void setup() {
pinMode (pinA,INPUT);
pinMode (pinB,INPUT);
/* Read Pin A
Whatever state it's in will reflect the last position
*/
pinALast = digitalRead(pinA);
Serial.begin (9600);
}
void loop() {
aVal = digitalRead(pinA);
if (aVal != pinALast){ // Means the knob is rotating
// if the knob is rotating, we need to determine direction
// We do that by reading pin B.
if (digitalRead(pinB) != aVal) { // Means pin A Changed first - We're Rotating Clockwise
encoderPo+;
bCW = true;
} else {// Otherwise B changed first and we're moving CCW
bCW = false;
encoderPosCount--;
}
Serial.print ("Rotated: ");
if (bCW){
Serial.println ("clockwise");
}else{
Serial.println("counterclockwise");
}
Serial.print("Encoder Position: ");
Serial.println(encoderPosCount);
}
pinALast = aVal;
}
*** CODE END ***
