AVR Atmel Studio 2560 485 library

I need a library written for 485. Slave to use on Ardunio UNO, Master on ATMEGA2560 chip, using Atmel studio. The ATMEGA2560 chip is NOT an arduino chip or project. The UNO slave is arduino. Please, if you do not have existing experience of Atmel Studio and Atmel chips, please DO NOT CONTACT ME. Also if you have never done 485, please do not contact me. Im looking for somebody that can help me with future projects on Atmel Studio. Using 2560 Atmega Chip. I am a programmer myself, but need help. I need a simplified library for both platforms.