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Appendix B
HP E1418A Register-Based Programming
The HP E1418A 8/16 Channel D/A Module is a register-based module. It does
not support the VXIbus word serial protocol. The module may be controlled at
the register level or, with appropriate drivers, controlled by higher level
commands.
The SCPI commands described in this manual are parsed by an HP E1405/
E1406 Command Module and turned into appropriate register reads and writes.
The same is true for HP Compiled SCPI programming in the C language.
In this case, SCPI commands are pre-processed by C-SCPI and replaced
with function calls to driver libraries that perform register-based
programming.
Note If SCPI commands (or other high level driver-based commands) are used to
program this module with a command module, then register programming is
not recommended. The SCPI driver maintains an image of the module state.
The driver will be unaware of changes made to the module by register access.
Register-based programming is a series of reads and writes directly to the
module registers. This appendix contains the information you need for
register-based programming. The contents of this appendix are:
• Addressing the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 114
• Reset and Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 119
• Register Maps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 120
• Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 126
• Register Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 148
Appendix B HP E1418A Register-Based Programming 113