[sane-devel] backend configuration error.

[m. allan noah]

ok, i remember some of this from before. try this-

ditch the printer temporarily, and reboot the machine. go into the bios 
settings, and try each of the ecp/epp/bidirectional etc, port options, one 
at a time. after changing one option, boot the machine into linux and run

SANE_DEBUG_PLUSTEK_PP=255 scanimage -L

from the command line.

check:

man plustek_pp

for more info.

allan

On Wed, 2 Aug 2006, Immanuel CRC Office wrote:

> No... I'm just trying to get my Plustek scanner to work, and it doesn't show 
> up in scanimage -L, that just shows the HP printer that is connected through 
> the scanner to my parallel port.
>
> Crystle
>
> m. allan noah wrote:
>> Crystle: are you writing a sane backend driver? the DBG macro is part of 
>> the source used to build SANE, every existing backend uses to print warning 
>> messages, so there are lots of examples...
>> 
>> allan
>> 
>> On Wed, 2 Aug 2006, Immanuel CRC Office wrote:
>> 
>>> Could you explain how to use the DBG macro?
>>> 
>>> Crystle
>>> 
>>> m. allan noah wrote:
>>>> 
>>>> try using the DBG macro in your backend to print some messages from 
>>>> within sane_init() and sane_get_devices().
>>>> 
>>>> then call:
>>>> 
>>>> SANE_DEBUG_BACKENDNAME=255 scanimage -L
>>>> 
>>>> Replace BACKENDNAME with name of your backend in all caps.
>>>> 
>>>> if you dont see your messages, then the dll backend may not be loading 
>>>> your backend. try using `strace scanimage -L` to be sure.
>>>> 
>>>> allan
>>>> 
>>>> On Wed, 26 Jul 2006, Rupesh Tarpara wrote:
>>>> 
>>>>> Hi,
>>>>> 
>>>>> I have hand held image scanner which is a USB-ACM device and uses 
>>>>> standard
>>>>> ACM driver (serial communication protocol over USB interface). The 
>>>>> device
>>>>> file created by driver is /dev/input/ttyACM0 (virtual serial device).
>>>>> 
>>>>> Following is the build procedure I have followed.
>>>>> 
>>>>> I have downloaded "sane-backends 1.0.18" source and made the following
>>>>> changes to incorporate my device:
>>>>> 1. I have created a new backend source file for this device.
>>>>> 2. I have modified "sane-backends-1.0.18/configure.in" and
>>>>> "sane-backends-1.0.18/backend/Makefile.in" files to include my backend.
>>>>> 3. executed autoconf, ./configure, make and make install
>>>>> 4. all libraries were installed at "/usr/local/lib/sane"
>>>>> 
>>>>> I modified the "/usr/local/etc/sane.d/dll.conf" file to include my 
>>>>> backend
>>>>> name.
>>>>> 
>>>>> I am using Xsane as frontend. When I run Xsane, it gives error message 
>>>>> as
>>>>> "no devices available"
>>>>> 
>>>>> -----------------------------------------------------------------------
>>>>> My queries,
>>>>> 
>>>>> 1) are there any backend configuration steps which I might have skipped?
>>>>> 2) What is the procedure frontend follows when it is executed?
>>>>> 3) How does the communication happens (or initiates) between 
>>>>> Frontend<---->
>>>>> backend <------> device?
>>>>> 4) What are the steps to be followed for new backend installation?
>>>>> 
>>>>> -------------------------------------
>>>>> 
>>>>> Additional information about OS and sane version I am using.
>>>>> 
>>>>> I am using RedHat AS3 OS, following is the output of uname -a
>>>>> [root at mypc root]# uname -a
>>>>> Linux mypc.home.com 2.4.21-40.EL #1 Thu Feb 2 22:32:00 EST 2006 i686 
>>>>> i686
>>>>> i386 GNU/Linux
>>>>> 
>>>>> [root at mypc root]# scanimage --version
>>>>> scanimage (sane-backends) 1.0.18; backend version 1.0.18
>>>>> 
>>>>> Regards,
>>>>> 
>>>>> Rupesh
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> http://www.patni.com
>>>>> World-Wide Partnerships. World-Class Solutions.
>>>>> _____________________________________________________________________
>>>>> 
>>>>> This e-mail message may contain proprietary, confidential or legally
>>>>> privileged information for the sole use of the person or entity to
>>>>> whom this message was originally addressed. Any review, e-transmission
>>>>> dissemination or other use of or taking of any action in reliance upon
>>>>> this information by persons or entities other than the intended
>>>>> recipient is prohibited. If you have received this e-mail in error
>>>>> kindly delete  this e-mail from your records. If it appears that this
>>>>> mail has been forwarded to you without proper authority, please notify
>>>>> us immediately at netadmin at patni.com and delete this mail.
>>>>> _____________________________________________________________________
>>>>> 
>>>> 
>>> 
>>> 
>> 
>
>

-- 
"so don't tell us it can't be done, putting down what you don't know.
money isn't our god, integrity will free our souls" - Max Cavalera