[rtl] Image acquisition

[Stephen Walton <swalton@sfo.csun.edu>]

Hi,

Thanks for the quick responses to my last note, all!  I am a happy rt_com
user now, triggering an SMD 1M15 camera at 5.00 frames per second (fps)
via its serial port, with adjustable exposure time.

On to the next task:  I need to save the images to disk at this rate.  I
already know that, provided the system is quiet, I can do 6 fps or so to a
raw disk partition quite easily (write() to /dev/sda5).  How can I
guarantee that I will get every one of the 5 fps to disk?  I've thought of
a round-robin buffer scheme to hold the images in RAM as they are
acquired.  Is there something simpler?  The camera is talking to the icpci
driver from www.gom.com, and that driver already has an area of shared
memory to which each frame is transferred.

--
Stephen Walton, Professor, Dept. of Physics & Astronomy, Cal State Northridge
stephen.walton@csun.edu

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