/*
    DetentTest.ino - Detent Potentiometer Test Program

*/

// Set potentiometer wiper input pin number
#define POT_PIN A0

unsigned long lastTime = 0;

int     potValue      = 0;
byte    decValue      = 0;
byte    lastDecValue  = -1;

int table [] = {
  10, 80, 200, 300, 400, 600, 700, 800, 950, 1015
};

void setup () {
  Serial.begin(9600);
  Serial.println("Starting...");
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(POT_PIN, INPUT);
  delay(10);
}

void loop() {
  unsigned long now = millis();
  if (now - lastTime >= 100) {
    lastTime = now;
    decValue = readPot();
    if (decValue != lastDecValue) {
      lastDecValue = decValue;
      Serial.print("Change: ");
      Serial.print(decValue);
      Serial.print(" - ");
      Serial.println(potValue);
    }
    digitalWrite(LED_BUILTIN, ! digitalRead(LED_BUILTIN));
  }
}

int readPot () {
  potValue = analogRead(POT_PIN);
  for (int n = 0; n < sizeof(table); n++) {
    if (potValue < table[n]) {
      return n;
    }
  }
  return sizeof(table);
}