[linux-dvb] FREECOM TNT USB Stick (25451)

RENOUARD Jean-Patrick jean-patrick.renouard at altran-ouest.fr
Mon Aug 20 14:35:09 CEST 2007


Le août 19, 2007 12:26 AM, M A Young <m.a.young at durham.ac.uk> a écrit:

> On Thu, 16 Aug 2007, RENOUARD Jean-Patrick wrote:
>
> > also, what is PID Filtering used to ?
> > I've seen in the Freecom source code that
> > DVB_USB_ADAP_HAS_PID_FILTER is
> > used.
> > Does that mean that the device suport USB1.1 ?
>
> That means it might work under USB 1.1, because it only passes on
> packets
> with the right PIDs meaning that the bandwidth required will probably
> fit
> into USB 1.1.
>
> > Also on this link (
> > http://www.linuxtv.org/wiki/index.php/DVB-T_USB_Devices ), Freecom
> > DVB-T
> > USB Stick (25451 rev3) is marked as USB2.0 and not USB1.1 but the
> > WT-220U chipset seens to be the same that in the others devices.
>
> This may not be the current Freecom DVB-T USB Stick though. I bought
> one
> in April 2006, and mine uses the ZL0353 chip which I believe is a
> later
> revision than the one you are considering. This only works on USB 2.0
> unless I apply a kernel patch (which I posted to this list some time
> ago)
> because one of the data channels is isoc under USB 1.1 and bulk under
> USB 2.0.
>
> Michael Young

So, you mean that the sticks based on the ZL0353 chip can't work in bulk
mode under usb1.1 ?

RENOUARD Jean-Patrick





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