On Tue, Nov 27, 2001 at 09:32:23PM +0000, Rus Foster wrote:
> I've managed to aquire a Psion Wavefinder (DAB) USB device and I wonder
> does anyone know of any drivers that are in devolopment. I've had a look
> at google and can't find anything of any real substance. I know from the
> looking at the kernel source that the is some form of USB DAB drivers but
> I don't think these are suitable due to the fact they are for a single
> type of chip. If there isn't anything then I might just be foolish enough
> to try and write my own driver (not that I've done anything on that scale
> before)
AFAIK, there's no Linux driver. But the pure driver is only half of the
problem. The Wavefinder does not have all the processing power you would
need to decode the DAB channel. The DSP inside does only a few "basic" jobs
(FFT, maybe Viterbi), the rest (de-interleaving etc.) has to be done by the
PC. Even then, you only have the MP2-subchannels, not the data services,
they need much more work.
BTW: Without any real documentation about the USB data stream it is IMHO
impossible to find out what's going on. The intermediate data could be
anything from FFT coefficients, DQPSK-data, Viterbi output to MSC data and
that in any weird format you can imagine. DAB is a very complex technique...
Since I'm one of the two who developed the DABUSB-receiver: The
dabusb-driver (which BTW gets an update in the next few days) provides a
more-or-less standard stream, the so called RDI (radio data interface). It
is also still not pure data, but it is at least documented.
--
Georg Acher, [EMAIL PROTECTED]
http://www.in.tum.de/~acher/
"Oh no, not again !" The bowl of petunias
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