Arduino Mega 2560 Multiple serial

Projects Programming
1

Hi,
I've got a problem with serials interfaces on arduino mega 2560, i'm trying to use serial, serial1 and serial2 simultaneously.
My code is this one:
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Serial1.begin(9600);
Serial2.begin(9600);
}

void loop() {
// put your main code here, to run repeatedly:

if(Serial1.available()>0)
{
Serial.print(Serial1.read());
}
if(Serial2.available()>0)
{
Serial.print(Serial2.read());
}
}[/table]

It don't walks, but if i try to use Serial and Serial1 it walks, and when i try to use Serial and Serial2 but the program don't run with both Serials.
I'm using adruino 1.5.2 i tried 1.0.5, i'm on windows Xp sp3.
I hope you understand my trouble and will help me.

2

How to use this forum

Code tags, please.

In what way does it not work?

Can you explain what you are inputting, and what the output is?

3

How have you wired up your serial ports?

4

Thank you for your fast answer.
I forgot to say i was using a shield: Gravity: 1602 LCD Keypad Shield For Arduino - DFRobot
It was the reason of my troubles. I plug it out and the serials works well.
I can't explain why but i'll use another one LCD.