[sane-devel] reading firmware date on hp 5200c

Mark Longridge mark at cubeman.org
Sat Mar 18 11:44:01 UTC 2006

Hi folks,

I'm kind of new to sane but I with the help of others I have managed
to add some functionally to the saneimage utility by adding some
code to hp-device.c

Around line 279 I added the following to hp-device.c just before
the for loop:

/* XXX Check firmware date */
  DBG(1,"Check firmware date\n");
  sanei_hp_scl_upload(scsi, HP_SCL_PARAMETER(4), buf, sizeof (buf));
  buf[4] = '\0';
  DBG(1, "firmware date is <%s>\n", buf);

then just in case I muck something up I did

./configure --enable-static --disable-shared --prefix=/tmp/mysane

then make clean and make

export SANE_DEBUG_HP=3
scanimage -d hp:/dev/usb/scanner0 > hp.ppm &> hp.msg

Ok now in hp.msg I got this:

hp] Check firmware date
[hp] firmware date is <3846>

This should work on 5200C and 4100C. I got it to work on my
HP 5200C which is connected to my computer via USB. I'm finding
it hard to learn about SCL... HP is not helping me at all. I found
some ancient dos SCL documentation on the net and I'm reading
the *.c and *.h files in sane-backends-1.0.16

I put some notes up on http://cubeman.org/hp.txt but it's 
rough going as you can see. Is it illegal now to look at the SCL
documentation? What companies are really helping Linux
programmers with documentation on their hardware??


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