/*********************************************************************************
 **
 **  LVFA_Firmware - Provides Basic Arduino Sketch For Interfacing With LabVIEW.
 **
 **  Written By:    Sam Kristoff - National Instruments
 **  Written On:    November 2010
 **  Last Updated:  Dec 2011 - Kevin Fort - National Instruments
 **
 **  This File May Be Modified And Re-Distributed Freely. Original File Content
 **  Written By Sam Kristoff And Available At www.ni.com/arduino.
 **
 *********************************************************************************/


/*********************************************************************************
 **
 ** Includes.
 **
 ********************************************************************************/
// Standard includes.  These should always be included.
#include <Wire.h>
#include <SPI.h>
#include <Servo.h>
#include "LabVIEWInterface.h"

/*********************************************************************************
 **  setup()
 **
 **  Initialize the Arduino and setup serial communication.
 **
 **  Input:  None
 **  Output: None
 *********************************************************************************/
 const int pwmOutPin = 9;
unsigned long previousMillis = 0;
const unsigned long interval = 10; // Update interval in milliseconds
const float frequency = 1;       // Frequency of the sine wave in Hz
const float period = 1000.0 / frequency; // Period in milliseconds

void setup()
{
  // Initialize Serial Port With The Default Baud Rate
  syncLV();

  // Place your custom setup code here
    Serial.begin(9600);
    // initialize the digital pin as an output.
  pinMode(pwmOutPin, OUTPUT);
}
/*********************************************************************************
 **  loop()
 **
 **  The main loop.  This loop runs continuously on the Arduino.  It
 **  receives and processes serial commands from LabVIEW.
 **
 **  Input:  None
 **  Output: None
 *********************************************************************************/
void loop()
{
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    float x = (currentMillis % (unsigned long)period) / period * 2 * PI;
    int sinValue = (sin(x)* 300) ;

    analogWrite(pwmOutPin, sinValue);
    Serial.println(sinValue);
    delay(5);
  }

}