//this code is using the sparkfun lcd, you may have to edit it for your lcd, 
//or just have this arduino inputting back to the computer instead of the 
//other one

#include <SoftwareSerial.h>

#define txPin 8
#define rxPin 7

char input;

SoftwareSerial myLCD = SoftwareSerial(rxPin, txPin);

void setup()
{
  pinMode(txPin, OUTPUT);
  myLCD.begin(9600);
  Serial.begin(2400);
  backlightOn();
  clearLCD();
  selectLineOne();
  delay(100);
}

void loop()
{  
  if (Serial.available() > 0) {
  input = Serial.read();
  Serial.print(input);
  myLCD.print(input);
  
  delay(100);
  }
}

void selectLineOne(){  //puts the cursor at line 0 char 0.
   myLCD.print(0xFE, BYTE);   //command flag
   myLCD.print(128, BYTE);    //position
}
void selectLineTwo(){  //puts the cursor at line 0 char 0.
   myLCD.print(0xFE, BYTE);   //command flag
   myLCD.print(192, BYTE);    //position
}
void clearLCD(){
   myLCD.print(0xFE, BYTE);   //command flag
   myLCD.print(0x01, BYTE);   //clear command.
}
void backlightOn(){  //turns on the backlight
    myLCD.print(0x7C, BYTE);   //command flag for backlight stuff
    myLCD.print(157, BYTE);    //light level.
}
void backlightOff(){  //turns off the backlight
    myLCD.print(0x7C, BYTE);   //command flag for backlight stuff
    myLCD.print(128, BYTE);     //light level for off.
}
void serCommand(){   //a general function to call the command flag for issuing all other commands   
  myLCD.print(0xFE, BYTE);
}