User`s guide

Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 1 2-25

Driver Functions

hp4156b_opc_Q

This function does the *OPC? common command.

Syntax ViStatus _VI_FUNC hp4156b_opc_Q(ViSession vi, ViPBoolean result);

Parameters vi Instrument handle returned from hp4156b_init( ).

result VI_TRUE (Operation complete), or

VI_FALSE (Operation is pending).

hp4156b_readData

This function reads and returns the source setup data or the data measured by the

hp4156b_startMeasure function.

Syntax ViStatus _VI_FUNC hp4156b_readData(ViSession vi, ViPInt32 eod,

ViPInt32 data_type, ViPReal64 value, ViPInt32 status, ViPInt32 channel);

Parameters vi Instrument handle returned from hp4156b_init( ).

eod End of data flag. 0 (not end of data), or 1 (end of data).

data_type Data type of the value. 0 (Voltage setup data),

1 (Current setup data), 3 (Time setup data),

8 (Voltage measurement data), 9 (Current measurement data),

11 (Time measurement data), 14 (Sampling index data), or

15 (Stress status data).

value Measurement data or source setup data.

status Measurement status or source status.

channel Channel number of the unit for measurement or output.

1 to 6 (SMU1 to SMU6), 21 (VSU1), 22 (VSU2), 23 (VMU1),

24 (VMU2), 27 (PGU1) or 28 (PGU2).