Measurement-computing Digital232 Manual de usuario descargar pdf (Pagina 59)

Appendix C IBM PC Interfacing

C.1

IMB PC Interfacing

10 REM *** DUMB TERMINAL PROGRAM FOR THE

Digital232

15 REM *** Running under IBM basica

20 REM *** This program allows direct interaction between the

25 REM *** IBM-PC and digital I/O devices through the Digital232.

30 REM *** Make sure the Digital232 is configured for its factory

35 REM *** default conditions, described in Section 2 of this manual.

40 REM ***

45 REM *** IOtech, Inc., P.O.Box 21204,

50 REM *** Cleveland, Ohio 44121 (440) 439-4091

60 CLS

70 REM *** Set communications parameters of COM1 port

80 OPEN "COM1:9600,N,8,2,cs,ds" AS 1

90 REM *** Display characters from COM1

100 IF LOC(1) THEN PRINT INPUT$(LOC(1),1);

110 REM *** Transmit any available characters from the keyboard

120 K$=INKEY$

130 PRINT #1,K$;: PRINT K$;

140 GOTO 100

Wiring Diagram for interfacing the Digital232 to an IBM PC

note: if the

Xon/Xoff

mode is enabled, then CTS pin 4 of the

Digital232

must be

connected to +Vtest pin 9.

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Measurement-computing Digital232 Manual de usuario Pagina 59