Proposal of access system based upon embeded system

This article deals with proposal of universal access system which would utilize the standard input-output ports of microcontroller. The whole proposal is based upon the ATmega64 processor, which makes the access system universal and very flexible. The main problem of this proposal is the USB communication decoding and creation of custom USB driver for TouchaTag reader. 1. Problem statement The goal of this article is to create the access system based upon ATmega64 processor. Universal USB Mifare Touchatag reader and door opening device. Block scheme of the system is pictured on Figure 1.