[sane-devel] backend configuration error.

[Immanuel CRC Office]

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.
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>>>
>>
>>
> 

-- 
Crystle Numan
Administrative Secretary, Immanuel CRC
61 Mohawk Rd. W. Hamilton ON   L9C 1V9
905-385-0662
office at immanuelministries.ca
http://immanuelministries.ca