[hpsdr] Starter question

[Bill Tracey]

Hi Bob, .

Initially (actually probably forever) one should be able to use Ozy+Janus 
to get audio samples in/out of the PC and use the existing SDR 1000 control 
interface (Parallel port or USB adapter).    Further down the road we plan 
to implement the control functions in the FX2 and the FPGA on Ozy.  We've 
checked the hardware is capable (I've tuned the DDS via Ozy in a bit bang 
style), but need to do some FX2 microcode and perhaps some FPGA work to get 
a higher level non bit bang interface similar to the existing SDR 1000 USB 
adapter.   The SDR 1000 control should not need any additional hardware 
other than Ozy+Janus.

What software are you looking to write?   At the moment we've got a 
modified PowerSDR  (1.6.1 and now a 1.6.3 tree) in the HPSDR SVN that works 
with Ozy+Janus for  audio in/out, CW keying and PTT.   The 1.6.1 tree is 
also the one I'm using for SoftRock xmit support - still need to get that 
working on the 1.6.3 tree.   As to documentation - we have the code, 
schematics,  in SVN and some rather limited notes on how the current SDR 
1000 USB adapter works.  Phil H also has a document of the protocol between 
Ozy/Janus and the PC on the USB bus  -- I don't think this is in SVN at the 
moment - we should get it there.   There's also some documentation on the 
hpsdr.org wiki.   More doco  would be good - however we seem to do that as 
needed.  Always willing to try and answer questions though.

One thing to be aware of with Ozy+Janus is that we do not look like a sound 
card to Windows, so we won't be able to talk to generic sound card 
programs.   This may get fixed in the future if someone does a sound card 
driver - think a couple of people have proposed doing this, don't think 
there's any code behind it as yet..  I suspect I'll (eventually) do an LGPL 
version of the and interface library so Ozy+Janus can be used with other 
non GPL SDR programs -- I know Albertom I2PHD (author of Winrad, SDRadio, 
and others) has expressed interest in such a library.

Glad you're interested - thing we're going to have a fun project.  Alpha 2 
round of boards is in process now and hopefully this will be the last of 
the Alpha's and the next will be production.   I need to get done with some 
of this Janus/Ozy stuff to find some time to go learn Erlang!

Cheers,

Bill (kd5tfd)


At 11:52 AM 11/13/2006, Bob Cowdery wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>Hi all,
>
>I've been following along with the fantastic HPSDR developments and I have 
>to say it's really shaping up now due to the hard efforts of all the 
>volunteers. Unfortunately I've not been able to help due to ineptitude 
>with hardware design and time limitations. However,  I'm now in the market 
>for more hardware to supplement my aging SDR1000 stack. I think if I am 
>going to spend money the HPSDR looks much more up my street and the timing 
>looks about right too. At the moment I have a few questions.
>
>I want to develop the software work I have been doing for the Flex system 
>to cover other hardware, primarily Softrock and HPSDR.  I would be 
>interested initially in just plugging the SDR1000 into Janus and using the 
>existing control interface. I am assuming that OZY is then the route to 
>get samples in/out of the PC. Is there any information on this interface 
>which would allow me to start writing the software in advance of the 
>boards being available?
>
>I did see some discussion where a SDR1000 interface board was proposed 
>which I guess would be planned to manage the control signals via the USB 
>interface. Is this still on the cards because it would be the second and 
>very desirable step prior to RX/TX boards becomng available.
>
>Thanks
>Bob
>G3UKB



 1163483598.0