Table of Contents
Advertisement
Chapter 2
6.
A color image transfers to the digital film recorder in three consecutive
passes—one pass each for the red, green and blue components of the image.
Sub-steps a, b, and c are repeated for each of the passes:
a.
The application sends a command to the film recorder, directing it to
accept data to create a single pass image. The film recorder asserts the
SRQ line as soon as a pass is completed.
b.
The application waits for RQS.
c.
When the SRQ line is asserted, the application serial polls the film
recorder to see whether it requested service, as in Step 5.
7.
The application issues a command to the film recorder to advance the film by
one frame. The advance occurs successfully unless the end of film is
reached.
8.
The application waits for RQS, which completes when the film recorder
asserts the SRQ line to signal it is done advancing the film.
9.
As soon as the application's wait for RQS completes, the application serial
polls the film recorder to see whether it requested service, as in Step 5. The
returned serial poll status byte indicates either of two conditions: the film
recorder finished advancing the film, as requested, or the end of film was
reached and it can no longer advance. Steps 6 through 9 are repeated as long
as film is in the camera and more images need to be recorded.
10. As a cleanup step before exiting, the application returns the interface board
back to its original state by taking it offline.
© National Instruments Corp.
2-11
NI-488.2M SRM for OS/2
Application Examples
Advertisement
Table of Contents
