[hpsdr] Software development and DttSP

[Georg Prinz]

Hello Dave,
thank you for the information, we are allowed to share. Unfortunately
the url https://www.cgran.org/browser/projects/dttsp fails due to not be
a secured connection. Does any other url exist?

73, 
Georg / dl2kp
> 


On Do, 2009-02-19 at 18:01 -0800, David McQuate wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi Alberto,
>   The source code for the DOS programs used by the script file, 
> initozy11.bat
> would contain the info needed to load the Ozy FPGA code (and thereby 
> "awaken" Ozy).
> One of these days I'll try to extract the necessary bits.
> 
>   Mercury receives "command and control" bytes as part of the regular 
> transmission of
> samples to it.  The details are contained in a document I mentioned my 
> recent posting to this list.
> Included in this info are the NCO frequency, the sampling rate, the 
> preamp state, etc.
> 
> (I believe that the anti-alias filters frequencies scale directly with
> the clock frequency.)
> 
> A side note - DttSP source can be found at
> https://www.cgran.org/browser/projects/dttsp
> 
> look in branches / ab2kt / sdr-core / base
> 
> In the sub-directory doc, there's an interesting paper "DTTSP.doc" 
> describing how DttSP works.
> 
> 73,
> Dave / wa8ywq
> 
> --Alberto wrote--
> In this vein, I think that it could foster some software development for 
> HPSDR the availability of a detailed list, step by step, of what is 
> needed to get data out of Mercury,
> > to send commands to Mercury and audio data to Penelope, etc. etc., to 
> > not mention Janus.
> >
> > What I mean is something rather detailed, without assuming any 
> > knowledge from the would-be implementer.
> >
> > - Is libusb the way to go ?
> > - Does it exist an API list for libusb ? Where ?
> > - Which commands need to be sent initially to Ozy to awake it ? 
> > Preferably without resorting to a script file, but directly from the code.
> > - When Ozy is no more sleeping, how can I convince it to talk with 
> > Mercury ?
> > - Which commands Mercury knows and acknowledges ?
> > - How can I change the NCO frequency ? And the sampling rate ?
> > - Are there commands to set the anti-alias filters when changing 
> > sampling rate or Mercury is smart enough to do it by itself ?
> >
> > That is a non exhaustive list, with the only purpose to make clear 
> > what I have in mind when asking for detailed information.
> > I don't know is something similar already exists. I know, I could read 
> > the PowerSDR source code, but, even if I haven't tried
> > that yet, I think that would be a very time consuming way. An 
> > implementer's guide would be much better.
> >
> > Thanks for listening
> >
> > 73  Alberto  I2PHD
> 
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