Agilent Technologies 4155B, Руководство пользователя

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Agilent 4155B/4156B VXIplug&play Driver User’s Guide, Edition 4
Programming Examples Using HP VEE
Programming Basics
Restrictions When Using the Driver with HP VEE
When using HP VEE and any of the following functions for Agilent 4155B/4156B
and Agilent E5250A, certain restrictions will apply.
Invalid functions in the VEE program
• hp4156b_init, hpe5250a_init
HP VEE calls and executes these functions automatically when the program first
runs after loading. These functions cannot be called in a program using HP VEE.
• hp4156b_close, hpe5250a_close
HP VEE calls and executes these functions automatically when you close the
program or HP VEE. These functions cannot be called in a program using
HP VEE.
• hp4156b_error_message, hpe5250a_error_message
These functions receive the error status of the plug&play driver function, and
returns the error message. However, these functions are invalid in a program
using HP VEE, because HP VEE does not pass the error status to the function.
Invalid use of the NULL pointer
The measurement functions listed below allow you to use the NULL pointer to
restrict the number of parameters returned from the function. However, the NULL
pointer is not available for HP VEE programming.
• hp4156b_spotMeas
• hp4156b_sweepIv
• hp4156b_sweepMiv
• hp4156b_sweepPiv
• hp4156b_sweepPbias
• hp4156b_measureM
• hp4156b_measureP
• hp4156b_sample
• hp4156b_readData