// ---------------------------------------------------
// ------ Let's create a basic-ass oscillator --------
// ---------------------------------------------------

// Basically, I'm testing the Wokwi system for potential DSP projects.
// Viewer discretion is STRONGLY advised

#include <LiquidCrystal.h>

// OSCILLATOR INITS
float freq = 0;                 //:
float amps = 100;               //:
float speed = 0.5;              //:
float offset = 500;             //:
float delayer = 10;             //:
float oscillator;               //:
float randval;                  //:
float rand_off = 50;            //:

// LCD INITS
#define rs 21
#define enable 12
#define d4 14
#define d5 27
#define d6 26
#define d7 25

LiquidCrystal LCD(rs, enable, d4, d5, d6, d7);
byte pins[] = {4,5,6}; // Initialize modes

void setup() {
  // -----------------------------------------------
  Serial.begin(9600); // Just because
  LCD.begin(16,1);
  for (int i = 0; i < 3; i ++){
    pinMode(pins[i], OUTPUT);
  }
} // -setup ----------------------------------------

void loop() {
  // -----------------------------------------------
  oscillator = sin(freq) * amps;
  freq += speed; // Make the oscillator wiggle
  randval = random(100) + rand_off;
  delay(delayer); // Apparently ESP depends on a delay function
  tone(4, oscillator + offset);
  tone(5, randval);
  LCD.println("\nFreq 1: " + String(oscillator+offset));
  LCD.println("\nFreq 2: " + String(randval));
} // -loop ------------------------------------------