Fluke 54200, Руководство пользователя

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54200
Users Manual
6-48
SUB RecDat (Rsp%)
SHARED stb%, ErrSts%
Tr = TIMER
RD$ = ""
C$ = ""
DO UNTIL (C$ = CHR$(10) OR (TIMER - Tr > 3))
IF LOC(1) > 0 THEN
C$ = INPUT$(1, #1)
IF C$ <> CHR$(10) THEN
RD$ = RD$ + C$
C$ = ""
END IF
END IF
LOOP
IF (TIMER - Tr > 3) THEN
ErrSts% = 1
PRINT "**** receive timeout ****"
PRINT
ELSE
ErrSts% = 0
IF Rsp% = 0 THEN
stb% = VAL(RD$)
ELSE
PRINT
PRINT "RESPONSE : " + RD$ 'response string
PRINT
END IF
END IF
END SUB
SUB SendCmd (Cmd%, Rsp%)
'Send command string to instrument via serial bus without response
WR$ = CHR$(27) + CHR$(Cmd% + 48)
PRINT #1, WR$ 'output command string
IF Cmd% = 7 THEN 'if statusbyte requested
CALL RecDat(Rsp%) 'get status byte
END IF
END SUB
SUB SendStr (WR$)
'Send command string to instrument via serial bus with response
SHARED stb%
qry = 0 'query flag
WR$ = WR$ + CHR$(10) 'append LF
PRINT #1, WR$ 'output command string
IF INSTR(WR$, "?") > 0 THEN 'check if query command
CALL RecDat(1) 'get response string
END IF
stb% = 0
CALL SendCmd(7, 0) 'ask for status byte
IF (stb% AND 16) THEN 'checks whether MAV is set
qry = 1
END IF
IF (stb% AND 32) THEN 'checks whether ESB is set
BEEP
WR$ = "err?" + CHR$(10) 'error query
PRINT #1, WR$ 'output command string
qry = 1
END IF
IF qry = 1 THEN
CALL RecDat(1) 'get error string