// ****************************************
// *                                      *
// * NAME : Cayo Colin Carbonaro          *
// * Program name : PChanger4.ino         *
// * DATE : 2023-02-24                    *
// * Desc : Light chaser with modifiable  *
// *        pattern by pressing button    *
// *        and a dial to change the speed*
// *                                      *
// ****************************************

int timer = 0;
int timerMultiplier = 0;
int delayTime = 100;                            // sets a variable for the delay
int buttonPin = 6;                              // sets pin for the button
int speaker = 7;                                // sets pin for the speaker
int i = 0;                                      // sets a variable to count the patterns
int set = 0;                                    // sets a variable to count the sets
int sensor = A0;
int pattern[6][3] = {                           // array for each pattern and set
  {16, 24, 28},                                 // pattern 1
  {12, 20, 24},                                 // pattern 2
  {4, 8, 16},                                   // pattern 3
  {4, 12, 28},                                  // pattern 4
  {24, 20, 12},                                 // pattern 5
  {16, 8, 4}                                    // pattern 6
};                   


void setup() {
  Serial.begin(9600);                          // opens serial port, sets data rate to 9600 bps
  DDRB = B011100;
  pinMode(speaker, OUTPUT);                    // config pin speaker to an OUTPUT
  pinMode(buttonPin, INPUT_PULLUP);            // config pin buttonPin to an INPUT
}

void loop() {
  timerMultiplier=(analogRead(sensor)/100)+1;  // takes the values from the dial and shrinks them to have a value between 1-11
  timer = delayTime * timerMultiplier;         // muliplies the initial delay time by the multplier to get the final timer

  if (digitalRead(buttonPin) == LOW) {          //checks if the button is pressed
    i++;                                        // increases the pattern value by 1
    if (i == 6) {                               // checks if the pattern value is 7
      i = 0;                                    // sets pattern value to 1
    }
    tone(speaker, i*100+200, 100);              // plays a sound corresponding to the current pattern
    delay(110);                                 // small delay for code to run smoothly
  }
  if (set == 3) {                               // replays current pattern
    set = 0;
  }
  
  PORTB = pattern[i][set];                      // plays current pattern and set
  delay(timer);                                 // delay so pattern is viewable
  set++;                                        // goes up by 1 set
}