Week 7: Embedded Programming

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Writing Code

Admittedly, I took this week as a lower-energy rest week due to other things going on in my life in parallel. As it turns out, I had technically fulfilled the requirements for this week back in Week 4 when I completed the group assignment for our section. Using the same board, I modified the code a little just for practice, however, to turn on and off the blinking light with the button (including debouncing).

const int LED = 4;
const int button = 2;
int lastButtonState;
int currentButtonState;
int onOffState = LOW;
long time = 0;
long debounce = 100;

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED, OUTPUT);
  pinMode(button, INPUT);
}

// the loop function runs over and over again forever
void loop() {
  lastButtonState = currentButtonState;
  currentButtonState = digitalRead(button);

  if (currentButtonState == HIGH && lastButtonState == LOW && millis() - time > debounce)
  {
    onOffState = !onOffState;
  }

  if (onOffState == HIGH)
  {
//    digitalWrite(LED, onOffState);
    digitalWrite(LED, HIGH);   // turn the LED on (HIGH is the voltage level)
    delay(100);                       // wait for a second
    digitalWrite(LED, LOW);    // turn the LED off by making the voltage LOW
    delay(100);                       // wait for a second
  }
}

It worked. ¯\_(ツ)_/¯