processing1_txt.pde

import processing.serial.*;
import java.io.*;
int mySwitch=0;
int counter=0;
String [] subtext;
Serial myPort;


void setup(){
 //Create a switch that will control the frequency of text file reads.
 //When mySwitch=1, the program is setup to read the text file.
 //This is turned off when mySwitch = 0
 //mySwitch=1;
 
 //Open the serial port for communication with the Arduino
 //Make sure the COM port is correct
 myPort = new Serial(this, "COM3", 9600);
 myPort.bufferUntil('\n');
}

void draw() {
 //if (mySwitch>0){
 /*The readData function can be found later in the code.
 This is the call to read a CSV file on the computer hard-drive. */
 readData("D:/MySensorData.txt");
 
 /*The following switch prevents continuous reading of the text file, until
 we are ready to read the file again. */
 //mySwitch=0;
 //}
 /*Only send new data. This IF statement will allow new data to be sent to
 the arduino. */
 
 if(counter<subtext.length){
 /* Write the next number to the Serial port and send it to the Arduino 
 There will be a delay of half a second before the command is
 sent to turn the LED off : myPort.write('0'); */
 print(subtext[counter]);
 myPort.write(subtext[counter]);
 delay(1000);
 myPort.write('0');
 delay(1000);
 //Increment the counter so that the next number is sent to the arduino.
 counter++;
 } /*else{
 //If the text file has run out of numbers, then read the text file again in 5 seconds.
 delay(5000);
 //mySwitch=1;
 }*/
} 


/* The following function will read from a CSV or TXT file */
void readData(String myFileName){
 
 File file=new File(myFileName);
 BufferedReader br=null;
 
 try{
 br=new BufferedReader(new FileReader(file));
 String text=null;
 
 /* keep reading each line until you get to the end of the file */
 while((text=br.readLine())!=null){
 /* Spilt each line up into bits and pieces using a comma as a separator */
 subtext = splitTokens(text,",");
 }
 }catch(FileNotFoundException e){
 e.printStackTrace();
 }catch(IOException e){
 e.printStackTrace();
 }finally{
 try {
 if (br != null){
 br.close();
 }
 } catch (IOException e) {
 e.printStackTrace();
 } 
 }
}