/*  Example playing a sinewave at a set frequency,
    using Mozzi sonification library.
 
    Demonstrates the use of Oscil to play a wavetable.
 
    Circuit: Audio output on digital pin 9 on a Uno or similar, or
    DAC/A14 on Teensy 3.0/3.1, or 
    check the README or http://sensorium.github.com/Mozzi/
 
    Mozzi help/discussion/announcements:
    https://groups.google.com/forum/#!forum/mozzi-users
 
    Tim Barrass 2012, CC by-nc-sa.
*/
 
//#include <ADC.h>  // Teensy 3.0/3.1 uncomment this line and install http://github.com/pedvide/ADC
#include <MozziGuts.h>
#include <Smooth.h>
#include <Oscil.h> // oscillator template
#include <tables/sin2048_int8.h> // sine table for oscillator
#include <AutoMap.h> // maps unpredictable inputs to a range
 
// use: Oscil <table_size, update_rate> oscilName (wavetable), look in .h file of table #included above
Oscil <SIN2048_NUM_CELLS, AUDIO_RATE> aSin(SIN2048_DATA);
 
// desired carrier frequency max and min, for AutoMap
const int MIN_CARRIER_FREQ = 22;
const int MAX_CARRIER_FREQ = 440;
const int KNOB_PIN = 0; // Pitch
 
// use #define for CONTROL_RATE, not a constant
#define CONTROL_RATE 64 // powers of 2 please
 
AutoMap kMapCarrierFreq(0,1023,MIN_CARRIER_FREQ,MAX_CARRIER_FREQ);
float smoothness = 0.95f;
Smooth <long> aSmoothIntensity(smoothness);
 
void setup(){
  startMozzi(CONTROL_RATE); // set a control rate of 64 (powers of 2 please)
  Serial.begin(115200); // set up the Serial output so we can look at the light level
  aSin.setFreq(440); // set the frequency
}
 
 
void updateControl(){
  // put changing controls in here
  int freqVal = mozziAnalogRead(KNOB_PIN); // value is 0-1023
  //int FRQ = mapThis(freqVal);
  aSin.setFreq(freqVal); // set the frequency
}
 
 
int updateAudio(){
  return aSin.next(); // return an int signal centred around 0
}
 
 
void loop(){
  audioHook(); // required here
}