[App_rpt-users] ARM Arch Linux version of allstar

[Shane Morris]

Hey Anthony,

I'm only scratching the surface here, of the GIT, but I imagine theres
some interesting code in there. What a great 30th birthday present...!

I can understand the considerations on the USB audio side of things,
after Jim highlighted the problems with the USB, I felt a little
despondent, and then thought "Well, what about chan_voter?"

To that end, I purchased an RTCM and started playing with it. I still
haven't powered it up - thanks Lithgow Leading Edge Electronics for
NOT getting my parts in... eBay it is...

I'm planning on using a Cubieboard (www.cubieboard.org) with this,
faster CPU, more on chip USB and separate ethernet channel, lots more
I/O, SATA, etc etc.

Have to see how it goes, I'm taking it...

On Sun, Jan 20, 2013 at 1:45 PM, Anthony Percy <anthcp at gmail.com> wrote:
> Hi Shane,
> I have also uploaded the ARM Raspberry PI version of the allstar code as
> well which did include chan_voter...at
> https://github.com/anthcp/Arch-ARM-RAS-PI-Allstar
> I hope it helps.
> The compile process is the same as my previous email.
>
> Just to to let you know, I found the sound on chan_usbradio with a CM108 usb
> fob was distorted for about 20% of the time when I did the *99 test tone on
> the PI.
> It could be acceptable on voice but I didn't test it any further.
>
>  I then tried to use chan_alsaradio but I think the CPU overhead was too
> high due to the downsampling from 44.1hz (?) to 8Khz.
> I have ordered a Griffin iMIC2 usb sound card which has hardware 8Khz
> sampling built in to see if it will work OK on the PI.( still waiting for
> it)
> If it does then it will mean that we will have to use the PI GPIO's for PTT
> and COR etc but that shouldn't be to hard.....(hopefully :-) )
>
> Regards
>
> Anthony, VK2ACP
>
>
>
> Date: Fri, 18 Jan 2013 09:11:29 +1100
> From: Shane Morris <edgecomberts at gmail.com>
> To: Eric Guth <eric at efratnetworks.com>
> Cc: app_rpt mailing list <app_rpt-users at ohnosec.org>
> Subject: Re: [App_rpt-users] Arch Linux version of allstar has been
>         stable for 2 weeks now....
> Message-ID:
>         <CANZw+5eg7T3OmjMVJquwFhZLJ3-yWo9iY-hDeBtTzgJWYdeYdw at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Interesting!
>
> Certainly smaller than my FitPC, but you knew that, cheaper too. Its a
> single core 1GHz x86, whereas my FitPC is a dual core 1GHz. I imagine
> its all passively cooled Eric?
>
> I was planning to run Allstar on a single core 1GHz ARM at some point
> in the future, Anthony mentioned in his first post two weeks ago he
> hopes to port the software to RaspberryPi (not to bring up the debate
> again, I'm only mentioning it for completeness - my goal is to run
> chan_voter, which DOESN'T need USB) and I think it would be simple to
> port to other ARM platforms, for the sake of argument, the Beagle
> Board, running newer kernel revisions.
>
> My FitPC does get quite warm Eric, even under "no load" conditions.
> I'm not entirely certain what it would do in 35+ degree Celsius heat
> in the middle of the Australian bush. I hope "work fine," not
> "explode"! So that might be a consideration for a totally passively
> cooled unit.
>
> My unit is going to be used to conduct a RTCM network, using
> chan_voter. None of the USB interfaces will be used, say, for URIs or
> other sound fobs. It'll be connected to the remote stations by long
> shot wifi links (Ubiquiti Bullet2s and Loco2s over ethernet).
>
> Eric, if you're going to use the USB ports on the 3350-AP, have a look
> at the structure of the USB hubs inside the computer. That'll tell you
> alot about whether you can use the sound fob with other devices, or
> you'll run into issues like the RPi. USB performance is critical, and
> I'm uncertain what the "on chip" USB ports would be like for such an
> integrated chipset.
>
> I hope this helps - technically, it should run it, from a "raw
> performance" standpoint. However, the practicality might be a little
> different. I do hope it works - please let me know how you go, I'm
> rather interested! That is a cheaper computer than the FitPC!