[sane-devel] CX5200 problem ...[email@example.com: recompiled
libsane with debugging symbols and stepped through the code...]
olaf.meeuwissen at avasys.jp
Wed Dec 20 00:53:14 CET 2006
Michal Sabala <debianbugs at saahbs.net> writes:
> I traced the problem to epson.c's get_identity2_information() where it
> fails due to an "incorrect" value in the return buffer. My cx5200, along
> other users cx5200s, has 0xb0 (176) in buf which has the most
> significant bit (0x80) set.
You can just remove the if block. I think it got in there by analogy
of the check_ext_status() function. There the first byte of the reply
has a bunch of flags in the first byte and 0x80 signals a fatal error.
With the get_identity2_information() the first two bytes hold the
optical resolution (as can be infered from the code, see below).
/* from get_identity2_information() */
receive (s, buf, len, &status); /* reveive actual status data */
if (buf & 0x80)
/* the first two bytes of the buffer contain the optical resolution */
s->hw->optical_res = buf << 8 | buf;
# BTW, the epkowa backend does this correctly.
Hope this helps,
Olaf Meeuwissen EPSON AVASYS Corporation, SE1
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