Справочник Пользователя для National Instruments Image Acqusition Software NI-IMAQdx
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Register-Level Programming
This appendix explains how to access and program register locations using
the NI-IMAQdx software, and discusses the caveats involved in
programming registers.
the NI-IMAQdx software, and discusses the caveats involved in
programming registers.
Introduction
All cameras communicate to the host computer through register maps.
The register map reflects the system memory located on the camera. The
register map allows the host computer to read and write information with
minimal overhead.
The register map reflects the system memory located on the camera. The
register map allows the host computer to read and write information with
minimal overhead.
The host computer sends asynchronous messages over the host bus to the
connected camera. When the data is written into memory on the camera, the
camera processes the incoming request. If possible, the camera responds
immediately. Otherwise, a pending transaction message is returned. When
the pending request is completed, the camera returns the results of the
request.
connected camera. When the data is written into memory on the camera, the
camera processes the incoming request. If possible, the camera responds
immediately. Otherwise, a pending transaction message is returned. When
the pending request is completed, the camera returns the results of the
request.