<br><br><br>>1. are you employed by microtek?<br><br> Yes,I am.<br>>2. do you know if the 2020s also uses the same protocol?<br><br>
I don't know the protocol that 2020s use. As far as I know, the 2020s
is different from 4020s in hardware. If you want to develop the driver
of 2020s, you could contact with us.<br>
<br>>3. are you planning to release the driver source for inclusion into SANE?<br><br> It is determined by our leader Whether we release the driver source for inclusion into SANE.<br><br><br><div class="gmail_quote">
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">---------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Wed, 18 Jun 2008 09:59:42 -0400<br>
From: "m. allan noah" <<a href="mailto:kitno455@gmail.com" target="_blank">kitno455@gmail.com</a>><br>
Subject: Re: [sane-devel] I have achieved ADF duplex scan<br>
To: eagleskycloud <<a href="mailto:eagleskycloud@gmail.com" target="_blank">eagleskycloud@gmail.com</a>><br>
Cc: <a href="mailto:sane-devel@lists.alioth.debian.org" target="_blank">sane-devel@lists.alioth.debian.org</a><br>
Message-ID:<br>
<<a href="mailto:97246d0e0806180659o10719028k72e04d5bc3cb9836@mail.gmail.com" target="_blank">97246d0e0806180659o10719028k72e04d5bc3cb9836@mail.gmail.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1<br>
<br>
nice work- i have a few questions:<br>
<br>
1. are you employed by microtek?<br>
2. do you know if the 2020s also uses the same protocol?<br>
3. are you planning to release the driver source for inclusion into SANE?<br>
<br>
allan<br>
<br>
2008/6/17 eagleskycloud <<a href="mailto:eagleskycloud@gmail.com" target="_blank">eagleskycloud@gmail.com</a>>:<br>
><br>
> Hi ,<br>
><br>
> With your help,I have achieved duplex ADF scan in our backend with<br>
> sane-backends 1.0.19 and XSane 0.995. Xsane could get front image and back<br>
> image of a paper at the same time while scanning with ADF.<br>
><br>
> I save back image in a buffer allocated by my backends then Xsane read<br>
> a back image after XSane have get a whole front image.<br>
><br>
> Below suggestion is from m. allan noah:<br>
><br>
> 1. from the frontend perspective, duplex is no different from simplex<br>
> adf, there are just more images.<br>
><br>
> 2. i have never gotten xsane's multi-page mode to work, i use<br>
> 'scanimage -b' or 'scanadf' command line tools<br>
><br>
> 3. there are several other backends which support duplex scans.<br>
> fujitsu, avision, epjitsu come to mind. You could look at their code<br>
> for suggestions, but then your code becomes a derivative work, and you<br>
> must release it also under the GPL.<br>
><br>
> 4. The way to write your code depends on the scanner. If the scanner<br>
> has enough memory to buffer the back side data until after the<br>
> front-side has been read, then you just read them sequentially. if the<br>
> scanner sends back the data interlaced, then you must buffer the back<br>
> side in memory until the front side has been sent to front-end, then<br>
> read back side from buffer. the fujitsu backend demonstrates both of<br>
> these.<br>
><br>
> 5. be aware that a proper front-end in batch mode will call<br>
> sane_start() at the beginning of each page, but only call sane_cancel<br>
> after the last page returns SANE_STATUS_NO_DOCS.<br>
> ...<br>
><br>
> Thank you.<br>
><br>
><br>
> --<br>
> sane-devel mailing list: <a href="mailto:sane-devel@lists.alioth.debian.org" target="_blank">sane-devel@lists.alioth.debian.org</a><br>
> <a href="http://lists.alioth.debian.org/mailman/listinfo/sane-devel" target="_blank">http://lists.alioth.debian.org/mailman/listinfo/sane-devel</a><br>
> Unsubscribe: Send mail with subject "unsubscribe your_password"<br>
> to <a href="mailto:sane-devel-request@lists.alioth.debian.org" target="_blank">sane-devel-request@lists.alioth.debian.org</a><br>
><br>
<br>
<br>
<br>
--<br>
"The truth is an offense, but not a sin"<br></blockquote></div><br>