| |
ZL3AI > APRDIG 11.10.03 09:43l 260 Lines 9350 Bytes #999 (0) @ WW
BID : 2117-ZL3AI
Read: GUEST
Subj: TAPR Digest, Oct 07, 2/5
Path: DB0FHN<DB0RGB<DB0MRW<OK0PKL<OK0PCC<OK0NAG<OK0PPL<DB0RES<ON0AR<ZL2BAU<
ZL3VML
Sent: 031009/1246Z @:ZL3VML.#80.NZL.OC #:10055 [Chch-NZ] FBB7.00i $:2117-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Solar tetroon aloft now - tracker apparently failed
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 7 Oct 2003 08:26:02 -0700
X-Message-Number: 10
>(about 28 feet along each edge). It appears, though, that something has
>gone wrong with the APRS payload - perhaps before it even left my hands
>(since I have no packets recorded on my laptop that was at the launch
site).
D'Oh! Just out of curiousity, where the heck do you get a 3000 sq.ft. solar
tetroon?
>a few days ago and thought, "hey, it works, why waste the time?". So... I
>just turned everything on and let it go.
One word: Checklists.
Scott
N1VG
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was: New
Mexico LANn-N?]]
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 7 Oct 2003 08:32:42 -0700
X-Message-Number: 11
>Is anybody working on an open-source TNC?
My net4501 single-board computer should arrive today. I'm hoping to put
together a Linux mini-distribution preconfigured with DIGI_NED and aprsd, or
at least a detailed HOWTO. The board and case have cost me $220 so far -
I'll probably be putting a couple of Baycom-style modems in the case and
tweaking the drivers to use the net4501's onboard general purpose I/O port.
It'll be bigger than many TNCs, but I think the cost will be competitive and
it'll provide far greater capabilities than any standalone TNC.
Now if we could just build a multichannel programmable DSP board that'd fit
in the 3.3-volt PCI slot, we'd have even more flexibility...
Scott
N1VG
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone?
From: "Georgette Sampson" <georgette.sampson@cox.net>
Date: Tue, 7 Oct 2003 10:37:11 -0500
X-Message-Number: 12
>Is anybody working on an open-source TNC?
>
>Adi
Essentially it's called Linux and the ax25 tools.
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone?
From: Adi Linden <adil@adis.on.ca>
Date: Tue, 7 Oct 2003 10:47:42 -0500 (CDT)
X-Message-Number: 13
>>Is anybody working on an open-source TNC?
>
>Essentially it's called Linux and the ax25 tools.
Ok, this is great and that's what I am using. Still, I need to interface
the PC hardware running linux to RF. For that purpose I still need a modem
of sorts.
Adi
--
Adi Linden | va3adi | va3adi@adis.ca | http://adis.ca
+-----------------------------------------------------------------+
IRLP Node 2590 in Sioux Lookout, Ontario
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was: New
Mexico LANn-N?]]
From: Adi Linden <adil@adis.on.ca>
Date: Tue, 7 Oct 2003 11:06:23 -0500 (CDT)
X-Message-Number: 14
>My net4501 single-board computer should arrive today. I'm hoping to put
>together a Linux mini-distribution preconfigured with DIGI_NED and aprsd, or
>at least a detailed HOWTO. The board and case have cost me $220 so far -
>I'll probably be putting a couple of Baycom-style modems in the case and
>tweaking the drivers to use the net4501's onboard general purpose I/O port.
>It'll be bigger than many TNCs, but I think the cost will be competitive and
>it'll provide far greater capabilities than any standalone TNC.
I thought about doing that. Running industrial type PC hardware with
embedded Linux. Hang a few Baycom-style modems off serial ports. One of
the big issues has been cost of the hardware. I have a few 486DX133
embedded boards but we're talking US$300 without any I/O and a board that
requires a PC/104 video card for initial setup. Since then there's the
net4501, that you mentioned, and also a small embedded board from PC
Engines (http://pcengines.ch/wrap.htm).
The question I have is, how well would it work to bit bang a Baycom-style
modem on general purpose I/O on PC hardware?
I am also interested in supporting APRS tracker RX on a regular voice
repeater. How can I get reliable packet data DCD off a Baycom-style modem?
I've seen a few designs but they are all use 'secret' code.
This type of thing may just be the reason to put a whole bunch of effort
into updating PeeWeeLinux (embedded Linux distribution
http://peeweelinux.org).
Adi
--
Adi Linden | va3adi | va3adi@adis.ca | http://adis.ca
+-----------------------------------------------------------------+
IRLP Node 2590 in Sioux Lookout, Ontario
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was:
New Mexico LANn-N?]]
From: David VanHorn <dvanhorn@cedar.net>
Date: Tue, 07 Oct 2003 11:09:29 -0500
X-Message-Number: 15
>Is anybody working on an open-source TNC?
There is a group, using the Atmel Mega-8 processor.
I can't say we've made a ton of progress, but work gets in the way. :)
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was:
New Mexico LANn-N?]]
From: Adi Linden <adil@adis.on.ca>
Date: Tue, 7 Oct 2003 11:20:25 -0500 (CDT)
X-Message-Number: 16
>There is a group, using the Atmel Mega-8 processor.
I looked at playing with Atmel but so far never got into it, prefer the
PIC instead.
>I can't say we've made a ton of progress, but work gets in the way. :)
Same here for my projects, work, renovations and family. Not much time
left after that.
Adi
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was:
New Mexico LANn-N?]]
From: David VanHorn <dvanhorn@cedar.net>
Date: Tue, 07 Oct 2003 11:28:16 -0500
X-Message-Number: 17
At 11:20 AM 10/7/2003 -0500, Adi Linden wrote:
>>There is a group, using the Atmel Mega-8 processor.
>
>I looked at playing with Atmel but so far never got into it, prefer the
>PIC instead.
If I may ask, WHY?
I find the internal "architecture" of the pic rather hideous.
----------------------------------------------------------------------
Subject: Re: Solar tetroon aloft now - tracker apparently fa iled
From: "Rochte, Robert" <rrochte@gpacademy.org>
Date: Tue, 7 Oct 2003 12:44:21 -0400
X-Message-Number: 18
>D'Oh! Just out of curiousity, where the heck do you get a
>3000 sq.ft. solar
>tetroon?
I design and manufacture them. I've been working with various types of
solar Montgolfieres for the past five years and have recently been refining
my solar tetroon designs.
This particular tetroon was the "Sky Diamond III" - a larger version of the
last tetroon that I announced on this list back in July. SD-II (a much
smaller tetroon designed to carry a simple HF beacon) shredded in high winds
back in the early part of August.
>One word: Checklists.
I'm convinced. No more seat-of-the-pants operating for me....
-R
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was: New
Mexico LANn-N?]]
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Tue, 7 Oct 2003 12:50:20 -0400
X-Message-Number: 19
>I thought about doing that. Running industrial type PC hardware with
>embedded Linux. Hang a few Baycom-style modems off serial ports. One of
>the big issues has been cost of the hardware. I have a few 486DX133
>embedded boards but we're talking US$300 without any I/O and a board that
>requires a PC/104 video card for initial setup. Since then there's the
>net4501, that you mentioned, and also a small embedded board from PC
>Engines (http://pcengines.ch/wrap.htm).
I can STILL get Lanner EM-520 boards. These are essentially Pentium
class single board computers, with built in VGA, 4 com ports, 2 USB,
Ethernet (10mbit), keyboard, Mouse (PS/2), sound, LPT, floppy, and
1 ATA channel. I've booted them to WIN98 and ran them on the
internet. I put Red Hat on one of them too. Oh, they also support
booting from disk-on-chip. They take PS/2 style power supplies, but
you can fudge your own with stuff from Jameco.
$xx.xx
I've made the offer to the group before. Sold quite a few.
Quite a few are still left...
If you look on the net, you can find all the specs on the things. Lanner
EM-520. With one exception. The 'generic' EM-520 had TV out.
These do not. While there were a few boards with the TV chips on
them, they all had the same BIOS which was a build that did not
support the TV hardware.
Mike
----------------------------------------------------------------------
Subject: Re: Open-Source TNC anyone? [was: The APRSteward SPAM filter [was:
New Mexico LANn-N?]]
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 7 Oct 2003 10:05:30 -0700
X-Message-Number: 20
Aren't the Atmel processors fairly similar to the PICs? I know they're
RISC - aren't they also Harvard architecture? PICs have a 13-bit
instruction word, I believe - what about AVRs? Personally I just stick with
the Motorola HC08 series... good old-fashioned von Neumann architecture. I
don't trust any microprocessor that doesn't let me write self-modifying
code. =]
Scott
N1VG
----------------------------------------------------------------------
Read previous mail | Read next mail
| |
