Application Programs 99
Supplemental Information
This appendix contains program listings translated into the following DOS-compatible languages and GPIB interfaces:
• GWBASIC and the Agilent 61062/82990/82335A GPIB Command Library for MS-DOS
• GWBASIC and the National Instruments GPIB-PC Interface Card
• Microsoft C and the Agilent 61062/82990/82335A GPIB Command Library for MS-DOS
• Microsoft C and the National Instruments GPIB-PC Interface Card
Each program is translated from the Agilent BASIC listing found in application #3. This example program was chosen as
representative of all application programs because it shows how to:
• Configure the interface card.
• Address the power module.
• Write strings to the power module.
• Write real arrays to the power module.
• Receive real numbers from the power module.
The six other application programs all use a subset of the above functions.
1 ’ MERGE "SETUP.BAS" AS DESCRIBED IN YOUR GPIB COMMAND LIBRARY MANUAL
2‘
1000 ‘ APPLICATION #3: CONTROLLING VOLTAGE RAMP UP AT TURN ON
1010 ‘ FOR GWBASIC AND THE Agilent 61062/82990/82335A GPIB COMMAND LIBRARY
1020 ‘ PROGRAM: Agilent 3.BAS
1030 ‘
1040 OPTION BASE 1
1050 INTERFACE = 7 ‘ SELECT CODE OF THE GPIB CARD
1060 SLOTO 705001 ‘ SELECT CODE 7, MAINFRAME ADDRESS 05, SLOT 00
1070 CR.LFS CHR$(13) + CHR$(10) ‘ CARRIAGE RETURN + LINE FEED = END OF LINE TERMINATION
1080 DIM VSTEP(20) ‘ ARRAY TO HOLD THE VOLTAGE RAMP STEPS
1090 NUM.POINTS = 20 ‘ NUMBER OF POINTS IN THE VOLTAGE RAMP ARRAY
1100 VSTART = 2 ‘ START VOLTAGE FOR RAMP
1110 VSTOP = 10 ‘ STOP VOLTAGE FOR RAMP
1120 RAMPTIME = .5 ‘ TIME IN SECONDS TO CHANGE FROM VSTART TO VSTOP
1130 DWELL = RAMPTIME / 19 ‘ DWELL TIME FOR EACH POINT
1140 ‘
1150 ‘ SINCE THE OUTPUT STAYS AT THE LAST VOLTAGE POINT AFTER ITS DWELL TIME EXPIRES, THE DWELL TIME OF THE
1160 ‘ LAST POINT IS NOT PART OF THE TRANSITION TIME. THEREFORE, DIVIDE THE TOTAL TIME BY 19 POINTS, NOT 20.
1170 ‘ YOU WANT THE SAME DWELL TIME FOR EVERY POINT IN THE LIST, SO YOU NEED TO DOWNLOAD ONLY 1 DWELL TIME.
1180 ‘
1190 FOR I=1 TO 20
1200 VSTEP(I) = VSTART + ((( VSTOP - VSTART ) / 20 ) * I ) ‘ CALCULATES VOLTAGE LIST POINTS
1210 NEXT I
1220 ‘
1230 NOTE REGARDING GPIB READ/WRITE TERMINATIONS:
1240 ‘
1250 ‘ THE DEFAULT MODE OF THE INTERFACE CARD IS THAT EOI IS ENABLED AND THE READ/WRITES TERMINATE
1260 ‘ ON CARRIAGE RETURN/LINE FEED. THE MODULE TERMINATES ON EITHER EOI OR LINE FEED, SO THE
1270 ‘ DEFAULT SETTINGS OF THE CARD ARE SUFFICIENT.
1280 ‘
1290 CMD$ = "*RST;*CLS;STATUS:PRESET" ‘ RESET AND CLEAR MODULE
1300 L = LEN( CMD$ )
1310 CALL IOOUTPUTS( SLOTO, CMD$, L )
1320 IF PCIB.ERR<>0 THEN ERROR PCIB.BASERR
1330 ‘