[sane-devel] backend configuration error.

[m. allan noah]

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
>>> 
>>> 
>>> 
>>> 
>>> 
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>> 
>
>

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