You should check out this tutorial: Interfacing 16×2 LCD with Atmega32 Microcontroller using Atmel Studio. You will be using the 4 bit mode. Essentially, you will use their library file lcd.h and ...

A 16×2 LCD display is a very basic module and is very commonly used in various devices and circuits. A 16×2 LCD means it can display 16 characters per line and there are 2 such lines. ... The circuit ...