//UltrasonicDemo.ino
#include "Ultrasonic.h"

void setup(){
    Serial.begin(SerialBaudRate);   //115200
    while (!Serial) {delay(10);} //wait for serial to wake up
    UltrasonicSetup();
}

void loop(){
  UltrasonicLoop();
}

*********************************************
//Excerpts from Ultrasonic.cpp

void UltrasonicSetup() {
   Serial.begin(SerialBaudRate);    //115200
   while (!Serial) {delay(10);}      //wait for serial to wake up
   D_show_cursor(false);            //disable cursor on display
   D_cls();
   D_position(0, 0);
   Serial.print(F("Ultrasonic library loaded"));

   pinMode(TRIGGER_PIN, OUTPUT);   //TRIG(speaker pin)
   pinMode(ECHO_PIN, INPUT);       //ECHO(microphone pin)
   attachInterrupt (digitalPinToInterrupt (ECHO_PIN), USInterruptTimer, CHANGE); //interrupt routine setup
   //attachPCINT(digitalPinToPCINT(ECHO_PIN), InterruptTimer, CHANGE); //when using PinChangeInterrupt.h
   delay(1000);
   D_cls();
}

*********************************************

void UltrasonicLoop(){

   SendPulse();   //send a pulse to the ultrasonic sensor
   average = RunningAverage(average, echoTime);

   char keystroke = checkSerial();

   if (keystroke != -1){            //for key tracking
    D_position(0,68);
    Serial.print(F("          "));
    D_position(0,68);
    Serial.write(keystroke);
    Serial.print(F("   "));
    Serial.print(int(keystroke));
  }

  D_position(1,68);                    //display current distance reading in centimeters
  Serial.print(F("     "));
  D_position(1, 68);
  Serial.print(USGetDist());
  D_position(1, 76);
  Serial.print(F("Centimeters"));

   switch(state){                                  //state machine
   case 0 : normal(keystroke);            break;   //normal operation
   case 1 : Calibration(keystroke);       break;   //calibration
   case 2 : calPoint(keystroke,1);        break;   //set calibration point 1
   case 3 : calPoint(keystroke,2);        break;   //set calibration point 2
   case 4 : calPoint(keystroke,3);        break;   //set calibration point 3
   }
}