[hpsdr] OZY now working!

[Philip Theis]

Hello Bill,
Thank you for the detailed triage, it worked.  I had something going on in
my power supply that caused it to drop to 3 volts when Janus was plugged in.
Note: don't let the power led's lull you into thinking the voltage is
adequate, they light just fine with only 3 volts, but as you said on the
current, it was only drawing 50 ma.
The system is now working and I am a happy camper.
I think we know that the documentation is out of date.  Joe, can I assist in
bringing it up to date since it's fresh in my mind?
Thanks all,
73,
Phil K3TUF

-----Original Message-----
From: Bill Tracey [mailto:bill at ewjt.com] 
Sent: Wednesday, January 23, 2008 11:25 PM
To: Philip Theis; hpsdr at lists.hpsdr.org; flexradio at flex-radio.biz
Subject: Re: OZY

You should not need to remove Janus to get Ozy recognized.

My understanding of what you're seeing now is Ozy will get recognized 
by the computer as a new USB device if you plug in the USB when it is 
the only card in  Atlas bus, but it is not recognized when Janus is 
plugged into the Atlas.

If this is the case two things I'd check,  First is how much current 
are you drawing on the +5, +12 and -12 lines.  For Ozy the only one 
that should matter is the +5 (all it uses +/- 12 for is RS232 
emulation).   My Ozy+Janus setup pulls about 100 ma from +5 and 200 
ma from +12 when initially powered up and not connected to the 
computer.   Are the +5, +12, -12 lines on the Atlas bus at those 
levels when Janus is plugged in.

Second thing I can think of that could be an issue is there's 
something on the I2C bus that is making the FX2 on Ozy unhappy when 
Janus is present.    You can isolate the I2C bus on Janus buy 
removing the 2 jumpers near U11 that are labeled I2C BYP on 
Janus.  Things will not work in that configuration, but Ozy should 
enumerate with the computer.

One last thing to check  - JP 12 on Janus (LAST JTAG) should be open.

Regards,

Bill (kd5tfd)

At 06:36 PM 1/23/2008, Philip Theis wrote:
>I can get Ozy to be recognized by removing Janus.  I two brand new boards
>and get the same results with both.
>Is part of the process in getting to get these to work that you must remove
>janus to get ozy started??
>Phil K3TUF