Re: [Discuss-gnuradio] Receiver FDM77 and GNUradio

[Mario Rossi]

> FYI, there's a copy of the FX2 technical ref manual here:
> http://comsec.com/usrp/FX2_TechRefManual.pdf
> (There may be a later version somewhere else)

Thanks

> > Big question: does it have anything to do with GNUradio?
>
> You could integrate this gadget with GNU Radio.
> Note that it's really just a tuner with an a single-ended IF output
> at 12 kHz.   You have to plug it into a sound card to convert the
> analog IF into samples.
>
> From the block diagram, it appears that the USB (used in 12mbit/sec
> mode) is used only to control the filters, DDS, etc.

Indeed. Since the USB it's used only for tuning, it should not require
a huge amount of work (I hope...).
My problem is that I completely miss the low level USB programming
skills and I hoped to find some sort of driver for the cypress chip in
Linux, in order to focus only on the protocol about frequence and
filter (which I might get from the manufacturer).

How big is the difference between USB and serial programming?

I've discovered just today, about GNUradio. I knew there was already
some sort of framework for radios in V4L-DVB (www.linuxtv.org). I'll
have a look at both to find some help for my problem.

Thanks