Read Failed at cupsBackChannelRead

[Zebra]

Hi,


   thanking you to reply to me, and i have another one doubt what about cupsSideChannelRead() and cupsSideChannelWrite() by using this , can we read or write to back end from USB printer ?

give me some guidance to resolve this problem

Regards
SivaKumar









> Since the USB backend does not support back-channel data on Linux, there =
> is NO WAY for you to do what you want.
>
> On Nov 17, 2009, at 9:53 PM, Zebra wrote:
>
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> > Hi,
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> >    I am using USB printer ,whatever i am sending the printer =
> responding,for example i am sending "\033R\r" the printer gets =
> restart,like this i want to send and read the response from printer if =
> back-end doesn't support the back channel means what i should do to read =
> a response even cupsSideChannelRead() and cupsSideChannelWrite() also =
> return -1.for this thing what i should do.
> >=20
> > Please Guide me to resolve this
> >=20
> > Regards
> >=20
> > SivaKumar
> >=20
> >=20
> >=20
> >=20
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> >> On Nov 17, 2009, at 7:51 PM, Zebra wrote:
> >>> ...
> >>>    I am connecting printer using USB port.
> >>=20
> >>=20
> >> On Linux, the USB backend does not support back-channel.
> >>=20
> >> ___________________________________________________
> >> Michael Sweet, Senior Printing System Engineer
> >>=20
> >>=20
> >>=20
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> > _______________________________________________
> > cups-ddk mailing list
> > cups-ddk at easysw.com
> > http://lists.easysw.com/mailman/listinfo/cups-ddk
>
> ___________________________________________________
> Michael Sweet, Senior Printing System Engineer
>
>
>