[App_rpt-users] ARM Arch Linux version of allstar

[Anthony Percy]

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!
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