National Instruments GPIB-PC - Page 134

Section Four A BASICA/QuickBASIC GPIB-PC Function Calls
©National Instruments Corp. 4A-59 GPIB-PC User Manual
Board Examples:
1. Read 56 bytes of data into the integer array RD% from a device
at talk address &H4C (ASCII L) and then unaddress it (the
GPIB-PC listen address is &H20 or ASCII space).
100 CMD$ = "? L" ' UNL MLA TAD
110 CALL IBCMD (BRD0%,CMD$)
120 CNT% = 56
130 REM Array size is equal to CNT% divided
140 REM by 2.
150 DIM RD% (28)
160 CALL IBRDI (BRD0%,RD%(0),CNT%)
170 REM Check IBSTA% to see how the read
180 REM terminated on: CMPL, END, TIMO, or
190 REM ERR.
200 REM Data is stored in RD$.
210 REM Unaddress the Talker and Listener.
220 CMD$ = "_?" ' UNT UNL
230 CALL IBCMD (BRD0%,CMD$)
QuickBASIC Version 2.0 and 3.0,
replace line 160 with:
160 CALL IBRDI (TAPE%,VARPTR(RD%(0)),CNT%)
QuickBASIC Version 4.0,
replace line 160 with:
160 CALL IBRDI (BD%,RD%(), CNT%)
2. To terminate the read on an end-of-string character, see IBEOS
examples.