[hpsdr] How many Janus/Ozy in one atlas?

[Bill Tracey]

Hmmm -- this will not work with out of the box firmware and software 
for a number of reasons:

     1. Janus and Ozy are talking to each other over the Atlas bus - 
with two of each  on the bus there would certainly be some conflicts 
in the signal lines being used on the Atalas bus.

     2. No provision in current PowerSDR code to deal with multiple 
Janus/Ozy boards - there is not mechanism to select a specific 
instance if it finds multiple Ozy's attached

This could be made to work -- would not take a rocket scientist,  in 
fact it's probably only slightly above a "Hello World" J/O 
project.  To do it you'd have to redo the CPLD on Janus2 and the FPGA 
on Ozy2 to use different signal lines on the Atlas bus to talk to 
each other.     I'd also change the VID/PID on Ozy2 so it appears as 
a different device and then build a new .inf file for libusb to claim 
the vid/pid.  Last thing that would need to be done is PowerSDR would 
need to be modified to look for a different VID/PID on the UBS bus to 
talk to J2/O2.

Another thought would be to try and sort out how to have one Ozy 
support multiple Janus's!  I suspect we have the hardware and 
bandwidth needed to do it - but it would only be able to support 
controlling one SDR1K.  Would also need some software changes since 
data from both Janus's would be coming over on a single USB stream.

Regards,

Bill (kd5tfd)


At 04:53 AM 5/18/2007, Lee Crocker wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>I have 2 SDR-1000, 2 Janus, 2 Ozy.  I would like to run 2 instances 
>of PowerSDR with 2 janus each PowerSDR running one of the radios.  I 
>presently use a dedicated LPT and the USB adapter to control the 
>various radios, as well as the other associated I/O.  What are the 
>combinations if any of multiple radios available with the 
>Ozy/Janus/Atlas interface?
>
>I don't have the combo alive yet as I am waiting on a PS but I was 
>interested in the possibilities
>
>tnx es 73
>
>W9OY
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