Using The Status Registers - HP 34401A User Manual

Chapter 6 Application Programs

Using the Status Registers

Using the Status Registers
The following example shows how you can use the multimeter's status
registers to determine when a command sequence is completed. For
more information, see "The SCPI Status Model," starting on page 134.
The example is shown in HP BASIC and QuickBASIC (see page 190).
HP-IB Operation Using HP BASIC
10 REAL Aver,Min_rdg,Max_rdg
20 INTEGER Val,Hpib,Mask,Task
30 ASSIGN @Dmm TO 722
40 CLEAR 7
50 OUTPUT @Dmm; "*RST"
60 OUTPUT @Dmm; "*CLS"
70 OUTPUT @Dmm; "*ESE 1"
80 OUTPUT @Dmm; "*SRE 32" ! Enable "standard event" bit in status byte
90 OUTPUT @Dmm; "*OPC?"
100 ENTER @Dmm; Val
110 !
120 ! Configure the multimeter to make measurements
130 !
140 OUTPUT @Dmm; "CONF:VOLT:DC 10"
150 OUTPUT @Dmm; "VOLT:DC:NPLC 10"
160 OUTPUT @Dmm; "TRIG:COUN 100"
170 OUTPUT @Dmm; "CALC:FUNC AVER;STAT ON"
180 OUTPUT @Dmm; "INIT"
190 OUTPUT @Dmm; "*OPC"
200 !
210 Hpib=7
220 ON INTR Hpib GOSUB Read_data
230 Mask=2
240 ENABLE INTR Hpib;Mask
250 !
260 ! Execute other tasks while waiting for data
270 !
Continued on next page ’
188
! Clear HP-IB and dmm
! Reset dmm
! Clear dmm status registers
! Enable "operation complete" bit to set
! "standard event" bit in status byte
! to pull the IEEE-488 SRQ line
! Assure synchronization
! Set dmm to 10 volt dc range
! Set the integration time to 10 PLCs
! Dmm will accept 100 triggers
! Select min-max and enable math
! Place dmm in "wait-for-trigger" state
! Set "operation complete" bit in standard event
! registers when measurement is complete
! Bit 1 is SRQ
! Enable SRQ to interrupt the program