The DMX-protocol is a product based on RS485 communication. It is the standard for lighting techniques. This protocol could also be used for other purposes. On this page you will find the code to put into the AVR to send or receive DMX.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.