[hpsdr] [dttsp-linux] Step1....

[Dave Larsen]

David 

I am sending this to both lists as the question has been posted on both
lists.  

As Phil says we are in early days yet.

First the easy question the code produced by most HPSDR programmers is
GPL2

We currently have several approaches to the problem based on the
platform.

Windows

PowerSDR using DttSP without jack.
Kiss Konsole using SharpDSP without jack
ghpsdr3 (server/client 4 receivers) using DttSP without jack


Mac

ghpsdr using DttSP without jack
MacHPSDR using MacOS DSP and drivers

Linux

ghpsdr with DttSP without jack
ghpsdr3 with (server/client 4 receivers) using DttSP without jack


We are just now working out a future approach but it like like we will
start at ghpsdr3 communication protocol.  you can fine documents
describing this protocol at:

http://openhpsdr.org/wiki/index.php?title=ATHENA

http://openhpsdr.org/wiki/index.php?title=Ghpsdr3

Early we had problems with uses being able to setup jack so we moved
away from jack in the main stream.  It would be easy to put a tap for
jack into the system.

Dave, KV0S


On Mon, 2010-08-09 at 15:51 +0800, Phil Harman wrote:
>   
> Hi David,
> 
> Thanks for your interesting and important questions. I must admit that
> since we are still at Step1 (well actually Step 3 since this weekend
> we
> released a Qt GUI and started implementing an optional CUDA version of
> the DSP code) I don't pretend to have all the answers.
> 
> I'm more the 'herder of cats' than the architect!
> 
> I'll post your comments on the HPSDR reflector and get some expert
> views.
> 
> 73's Phil...VK6APH
> 
> > Phil
> >
> > Interesting - as a data mode ham, I have a couple of questions:
> >
> > "All DSP on the server" - now how does this split work for say
> PSK-31? On
> > my current setup I take raw I/Q audio via jack from the softrock,
> dttsp
> > does the hard work of selecting an chunk of spectrum, and this
> reappears
> > (again in jack) as an audio signal. FLdigi is connected to this, and
> does
> > not know it wasn't connected to the headphone socket of a 'real'
> radio.
> >
> > Would your design export the intermediate audio (realtime across the
> > network), or would you split fldigi to run its modem(s) on the
> server, and
> > export decoded text (plus non-realtime waterfall data) to the
> client?
> >
> > One other detail - is this work GPL v3 or GPL v2?
> >
> > 73
> >
> > --David G8SQH
> >
> > On Sun, 8 Aug 2010 19:05:14 +0800
> > "Phil Harman" <phil at pharman.org> wrote:
> >
> >> All,
> >>
> >> I recently posted the following information to the SoftRock
> reflector.
> >> Naturally the offer also goes to all members of the dttsp-linux
> >> reflector.
> >>
> >> 73's Phil...VK6APH
> >>
> >> Step1..
> >>
> >>
> >>
> >> As others have reported, the openHPSDR group is having a similar
> >> discussion on their reflector in relation to the future direction
> of our
> >> PC SDR software.
> >>
> >>
> >>
> >> We have recently decided to pursue a Client - Server architecture
> with
> >> the following features:
> >>
> >>
> >>
> >> - open source
> >>
> >> - cross platform, Win, MacOS and Linux
> >>
> >> - to use free development tools
> >>
> >> - Client and Server may be located on the same PC or separate
> >> PCs located anywhere, world wide.
> >>
> >> - Clint-Server communications to be UDP/IP and/or TCP/IP based
> >>
> >> - Server to work with multiple makes and models of SDR hardware
> >> and perform all DSP processing.
> >>
> >> - GUI based on Qt
> >>
> >>
> >>
> >> By allowing the Server to undertake all the hardware interfacing
> and DSP
> >> we hope that folks who are keen to try their hand at programming a
> GUI
> >> will be so motivated.
> >>
> >>
> >>
> >> We have a draft Client - Server protocol document titled "ghpsdr3
> >> communication protocols 2010-08-07 " which can be found here
> >>
> >>
> >>
> >> < http://openhpsdr.org/wiki/index.php?title=Ghpsdr3>
> >>
> >>
> >>
> >> This is a very early attempt at defining an interface "standard"
> and
> >> will be modified and evolve over time. John, G0ORX/N6LYT, only
> wrote it
> >> in order to get an interface to Multiple Mercury receivers working.
> >> However, it is a starting point that we can build on... Step1.
> >>
> >>
> >>
> >> We have our first cross platform server thanks to John. This
> currently
> >> supports fixed frequency and Si570 USB interface SoftRocks. It also
> >> supports the openHPSDR Mercury receiver for both single and
> multiple
> >> receivers and boards. The original server code was written for
> Linux
> >> and has been ported to Windows by Dave, WA8YWQ.
> >>
> >>
> >>
> >> John has also developed a Qt based GUI Client - more details to
> follow.
> >>
> >>
> >>
> >> At the moment there is no transmit support but that will be added
> >> shortly.
> >>
> >>
> >>
> >> There is a wealth of world class programming talent on both the
> >> openHPSDR and Softrock reflectors. Naturally, folks are welcome to
> >> pursue their own interests but perhaps if there are some members
> here
> >> who would like to be involved in the development then perhaps we
> can
> >> produce some SDR software with world class features.
> >>
> >>
> >>
> >> So, we are very much at Step1.... of which we expect will be an
> >> interesting, and rewarding, journey.
> >>
> >>
> >>
> >> 73's Phil.VK6APH
> >
> >
> > --
> > <djch-yahoo at whabbit.demon.co.uk>
> >
> 
> 
> 
> 
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