/* Made by Jefferson Sandoval during the Embedded programming for the FabAcademy2021
 *  
 * This is just a simple testing code in Arduino consisting of a button and a led, if 
 * the button is pressed, the led is going fade in and fade out one time. 
 * 
 * This code was uploaded to a board with an Attiny1614 microcontroller. Documentation:
 * http://fabacademy.org/2021/labs/kamplintfort/students/jefferson-sandoval/assignments/week09/
 */

const int button = 9; // Set number of the button pin
const int led = 10;   // Set number of the LED pin
byte buttonState = 1; // Variable for button status

void setup() {
  pinMode(led, OUTPUT);   // Set LED as an output
  pinMode(button, INPUT_PULLUP); // Set button as an input with PullUp resistors configuration
}

void loop() {
  buttonState = digitalRead(button); // Read state of the button value

  if (buttonState == LOW) // Check if button is pressed
  { // If button is pressed, Turn on LED
    delay(500);

    // fade in from min to max in an increments of 5
    for (int i=0; i<=255; i+=5){
    analogWrite(led, i);
    delay(50);}
    
    // fade out from max to min in a decrement of 5
    for (int i=255; i>=0; i-=5){
    analogWrite(led, i);
    delay(50);}
    
  } else {
    digitalWrite(led, LOW);} // If button is not pressed, keep the LED off
}