On 6/18/08, eagleskycloud <eagleskycloud at gmail.com> wrote: > > > > >1. are you employed by microtek? > > Yes,I am. > >2. do you know if the 2020s also uses the same protocol? > > 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. > > >3. are you planning to release the driver source for inclusion into SANE? > > It is determined by our leader Whether we release the driver source for > inclusion into SANE.
did you use any sanei functions (like sanei_usb) in the development of the driver? if so, your code may be automatically covered by the GPL if you ever release it. this is a current point of debate on the mailing list. allan > > > > > > --------------------------------------------------------------------- > > > > Message: 1 > > Date: Wed, 18 Jun 2008 09:59:42 -0400 > > From: "m. allan noah" <kitno455 at gmail.com> > > Subject: Re: [sane-devel] I have achieved ADF duplex scan > > To: eagleskycloud <eagleskycloud at gmail.com> > > Cc: sane-devel at lists.alioth.debian.org > > Message-ID: > > > <97246d0e0806180659o10719028k72e04d5bc3cb9836 at mail.gmail.com> > > Content-Type: text/plain; charset=ISO-8859-1 > > > > nice work- i have a few questions: > > > > 1. are you employed by microtek? > > 2. do you know if the 2020s also uses the same protocol? > > 3. are you planning to release the driver source for inclusion into SANE? > > > > allan > > > > 2008/6/17 eagleskycloud <eagleskycloud at gmail.com>: > > > > > > Hi , > > > > > > With your help,I have achieved duplex ADF scan in our backend with > > > sane-backends 1.0.19 and XSane 0.995. Xsane could get front image and > back > > > image of a paper at the same time while scanning with ADF. > > > > > > I save back image in a buffer allocated by my backends then Xsane > read > > > a back image after XSane have get a whole front image. > > > > > > Below suggestion is from m. allan noah: > > > > > > 1. from the frontend perspective, duplex is no different from simplex > > > adf, there are just more images. > > > > > > 2. i have never gotten xsane's multi-page mode to work, i use > > > 'scanimage -b' or 'scanadf' command line tools > > > > > > 3. there are several other backends which support duplex scans. > > > fujitsu, avision, epjitsu come to mind. You could look at their code > > > for suggestions, but then your code becomes a derivative work, and you > > > must release it also under the GPL. > > > > > > 4. The way to write your code depends on the scanner. If the scanner > > > has enough memory to buffer the back side data until after the > > > front-side has been read, then you just read them sequentially. if the > > > scanner sends back the data interlaced, then you must buffer the back > > > side in memory until the front side has been sent to front-end, then > > > read back side from buffer. the fujitsu backend demonstrates both of > > > these. > > > > > > 5. be aware that a proper front-end in batch mode will call > > > sane_start() at the beginning of each page, but only call sane_cancel > > > after the last page returns SANE_STATUS_NO_DOCS. > > > ... > > > > > > Thank you. > > > > > > > > > -- > > > sane-devel mailing list: > sane-devel at lists.alioth.debian.org > > > > http://lists.alioth.debian.org/mailman/listinfo/sane-devel > > > Unsubscribe: Send mail with subject "unsubscribe your_password" > > > to > sane-devel-request at lists.alioth.debian.org > > > > > > > > > > > -- > > "The truth is an offense, but not a sin" > > > > -- "The truth is an offense, but not a sin"
