Printer interface system

Details Printer interface system Printer interface system

1994-02-03

1997-07-29

Baker, Stephen M.

Excavating

34031002, 34031003, 340538, A61B 500, H04B 354, H04L 100

Patent

active

056527551

ABSTRACT:
Monitor (11) includes a microcontroller (51) programmed in a first mode of operation to drive various loads (59), (69) which operate to perform tests on patient samples. The results of the tests are sensed by sensors (61), (75) and digitally stored in storage (67) for display on display (21). The microcontroller (51) is programmed in a second mode of operation to transmit the stored displayed information to a printer (13) over the line (23) transmitting power to the monitor (11) by selectively routing current through the load (69). A data transmission interface (15) includes circuitry (37) (39) (43) for sensing the changing current provided to the monitor (11) for decoding the information to be printed and for sending print information to printer (13). Error checking is performed by microprocessor (39) which inhibits all printing if any errors occur in the received message.

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Slater, M., "Microprocessor-Based Design", Mayfield Publishing Co., pp. 412-445 Oct. 1987.

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