#include <TimerOne.h>

// extern const uint16_t ANALOG_OUTPUT_SPEED = 32768; // speed of the analog output in Hz
// extern const uint16_t ANALOG_OUTPUT_SPEED = 48000; // speed of the analog output in Hz
extern const uint16_t ANALOG_OUTPUT_SPEED = 10; // speed of the analog output in Hz
extern const float ANALOG_OUTPUT_MICROS = 1000000 / ANALOG_OUTPUT_SPEED; // speed of the analog output in Hz

///////////////////////////
// Define Pins
///////////////////////////
extern uint16_t analogInPin1 = A0; // attack 0 - 1,023
extern uint16_t analogInPin2 = A1; // attack 0 - 1,023

extern uint8_t oneBITPin1 = 2; // using the LSB for digital noise
extern uint8_t oneBITPin2 = 3; // using the LSB for digital noise

extern uint8_t twoBITandPin = 4; // using the LSB + LSB+1 in an AND configuration for digital noise
extern uint8_t twoBITorPin = 5; // using the LSB + LSB+1 in an OR configuration for digital noise

extern uint16_t digitalInPin1 = 6;
extern uint16_t digitalInPin2 = 7;

void setup() {
  Serial.begin(115200);
  Serial.println("=====================");
  Serial.println("     Rusty Valve     ");
  Serial.println("=====================");
  Serial.println("   NOISE GENERATOR   ");
  Serial.println("=====================");

  // setup routines
  setPinModes();
  setupTimers();
}

///////////////////////////
// Set Pin Modes
///////////////////////////
void setPinModes() {
  pinMode(analogInPin1, INPUT);
  pinMode(analogInPin2, INPUT);

  pinMode(oneBITPin1, OUTPUT);
  pinMode(oneBITPin2, OUTPUT);

  pinMode(twoBITandPin, OUTPUT);
  pinMode(twoBITorPin, OUTPUT);

  pinMode(digitalInPin1, INPUT);
  pinMode(digitalInPin2, INPUT);
}

///////////////////////////
// Setup Timers
///////////////////////////
void setupTimers() {
  Timer1.initialize(ANALOG_OUTPUT_MICROS);
  Timer1.attachInterrupt(getAnalog);
  Timer1.start();
}

///////////////////////////
// Timer1 Setup
///////////////////////////
void getAnalog() {
  // get the analog reading
  uint16_t thisRead1 = analogRead(analogInPin1); // read the analog input pin
  uint16_t thisRead2 = analogRead(analogInPin2); // read the analog input pin

  uint8_t thisBit1 = bitRead(thisRead1, 0); // read the LSB from analogInPin1
  uint8_t thisBit2 = bitRead(thisRead2, 0); // read the LSB from analogInPin2

  // Output 1-BIT Noise
  digitalWrite(oneBITPin1, thisBit1); // send the LSB to oneBITPin1
  digitalWrite(oneBITPin2, thisBit2); // send the LSB to oneBITPin2

  Serial.print("thisBit1 = ");
  Serial.println(thisBit1);

  Serial.print("thisBit2 = ");
  Serial.println(thisBit2);

  // calc 2-BIT AND Noise
  uint8_t twobitANDnoise = thisBit1 & thisBit2; // calc an AND with LSB + LSB+1
  digitalWrite(twoBITandPin, twobitANDnoise); // send the AND bit
  Serial.print("twobitANDnoise = ");
  Serial.println(twobitANDnoise);

  // calc 2-BIT OR Noise
  uint8_t twobitORnoise = thisBit1 | thisBit2; // calc an OR with LSB + LSB+1
  digitalWrite(twoBITorPin, twobitORnoise); // send the OR bit
  Serial.print("twobitORnoise = ");
  Serial.println(twobitORnoise);
}

void loop() {
  ///////////////////////////
  // receive commands over serial
  ///////////////////////////
  // if (Serial.available()) { // if there is data coming
  //   String command = Serial.readStringUntil('\n'); // read string until newline character
    
  //   if (command == "g") {
  //     gateON();
  //   }

  //   if (command == "h") {
  //     gateOFF();
  //   }
  // }
}