Thanks for all help, I got it work:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 character, 2 line display
void setup()
{
Wire.begin(3);
Wire.setModule(3);
pinMode(15,INPUT_PULLUP); // I2C3SDA
pinMode(14,INPUT_PULLUP); // I2C3SCL
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.print("I2C display OK! ");
lcd.setCursor(0,1);
lcd.print("on Tiva C...");
}
void loop()
{
}
I am using YwRobot LCM1602 I2C adap