[hpsdr] Janus - Ozy - SDR1000 simplicity

[Bill Tracey]

Joe - thanks for the kind words on my code -- some clarifications in 
line below

Regards,

Bill (kd5tfd)
At 09:23 AM 3/6/2007, Joe - AB1DO wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>
>Hi all,
>
>I am currently working with Phil Harman on writing a manual on how 
>to operate the Janus/Ozy combo with the SDR-1000. Because of all the 
>discussions going on on the reflector about FPGAs, CPLDs, EEPROMs, 
>JTAG and what have you I (and I assume other mere mortals like me) 
>was expecting a separate initialization procedure would be required, 
>not to mention special cables. NOT SO!

For cables one will need a 25 pin male male straight thru cable to go 
from Ozy to SDR 1K,  2x 1/8 stereo patch cables for IQ in and out 
(assuming one connects mic and speakers direct to Janus).  For the 25 
pin male-male cable I'm currently using a 1 foot long home made 
ribbon cable with IDC connectors - may not be ideal in a hi RF 
environment.   For the audio interconnect I'm using Radio Shack 
#42-2497 ( 
http://www.radioshack.com/product/index.jsp?productId=2102970&cp=2032058.2032228.2032255&parentPage=family 
)

>
>Through our various back and forths on text etc I discovered that 
>Bill Tracey and he have really simplified it. Just to make sure that 
>anyone considering buying Janus/Ozy to work with the SDR-1000, but 
>holding off is not doing so due to wrong assumptions I thought I'd 
>share it with the group here.
>
>Janus will be shipped with its CPLD pre-programmed, as will Ozy with 
>its EEPROM (someone correct me if I'm wrong). Ozy is connected to 
>the PC via a USB cable. All the relevant audio connections are made 
>to/from Janus and the SDR-1000, etc and for control a parallel cable 
>between Ozy and SDR-1000. Then just select Janus as you would any 
>other sound card in PowerSDR. That's it. Ozy's FPGA is then 
>automatically loaded through the USB and you're ready to roll. 
>Future updates to Janus's CPLD and Ozy's FPGA will all occur through 
>Ozy's USB connection.


The CPLD will be pre programmed, as will the Ozy EEPROM, however the 
programming in the Ozy EEPROM will only be for self test - the Ozy 
FPGA is configured over USB when we bring the device up for use with 
PowerSDR.

There will actually be 2 selections/configurations one has to do in 
PowerSDR -- one to select Janus/Ozy as the audio device and 1 to 
select it as the control device.  This is to allow one to use the 
audio section without using the control section.  I've not tested 
using just the control section and not the audio section so that 
configuration may or may not work.

Updating the CPLD via USB is a bit of code still to be written.  I 
believe it is doable, but the code (FX2, Ozy FPGA, PC side utility) 
remains to be written

>
>If you think about it, it's even simpler than installing a sound 
>card, as there is no driver to install, no mixer to deal with, 
>nothing. Just hook up and run.

One will need to install the libusb drivers to talk to Ozy.  Not 
quite hook it up and run but close.

>
>Hats off guys!
>
>73 de Joe - AB1DO



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