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Library's collection Library's IT development CancelIn this final project a RS-485 Network Sistem designed to connect an
IBM-PC Compatible as Master Unit and some 8031 Minimum System as Slave
Unit. The application is as a Music Lounge Song Request System .
Master and Slave connected one to another by a couple of transmision line.
The communication system used is a half-duplex system, therefore the
transmission line can not be used to transmitting and receiving at the same time.
Slave Unit and Master Unit communicate using a specially designed protocol for
this application. The protocol is designed to work in a Master-Slave Polling
System where the Slave Unit would not transmit anything before it is asked
(polled) by Master Unit. This system can handle 31 Slave Units.
Hardware and Software test has been made. The result of the test using a
Master Unit and two Slave unit each slave unit can do request to Master Unit very
well.