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<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>Thank
you David this is helpfull.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>Maybe
one day we will have a PIC in space and a radio !</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>I am
fluent with assembly and have no probs with the 16F877A data thats
fine.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>Its
the AX25 implementation I can not get my brain around.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>I know
Scott has a packet shooter ? I was even considering that as well.
</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>I
don't see why I should comit a TNC or D700 just for a simple
task.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>We
have around 30 cheap handhelds, bought for another project on VHF.
</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>I have
made the 16F877A do RTTY but that was as far as I got.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>I am
using MPLAB and have a programmer. I just ordered some 16F877A boards made up
from futurelec.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>I
notice that PIC's are now come with a 10 Mb LAN interface as well. Soon we will
have TCP/IP capable TNC's with IP addresses !</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>When I
get a house, I will play with automation, such as sattellite antenna arrays etc.
I am dabbling with SOLAR panels, hence I recently ordered some opentrackers for
telem of volts and temp.</FONT></SPAN></DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=500490822-25012007><FONT face=Arial color=#0000ff size=2>Cheers
Andrew</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<P><FONT face=Arial size=2>-----------------------------------------<BR>Andrew
Rich<BR>Amateur radio callsign VK4TEC<BR>email: </FONT><A
href="mailto:vk4tec@tech-software.net"><FONT face=Arial
size=2>vk4tec@tech-software.net</FONT></A><BR><FONT face=Arial size=2>web:
http://www.tech-software.net<BR>Brisbane AUSTRALIA </FONT></P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Dave Baxter
[mailto:dave@emv.co.uk]<BR><B>Sent:</B> Friday, 26 January 2007 9:57
AM<BR><B>To:</B> vk4tec@tech-software.net; TAPR APRS Mailing
List<BR><B>Subject:</B> RE: [aprssig] APRS telemetry and the PIC
16F877A<BR><BR></FONT></DIV>
<DIV id=idOWAReplyText41985 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Easy!... (Reletively
at least!)</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Google for SOTT, or "Son of Tiny
Trak" The code ports easily to the F877, and as it's in C, is relatively
easy to manipulate. Somewhere I have one such already programmed.
I know some people were also looking into using the PWM system to output the
tones. Likewise, the PWM capture logic to receive and decode them, for
all I know they got it working, or maybe not.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>However, as above, the SOTT code goes
easily into the F877. If I can do it, anyone can!...</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>The one nice thing about PIC's, is for
the same series of CPU, (8 or 16 bit) the code changes very little between
devices in the same family. Most is figureing out the config settings,
and port naming conventions. Sometimes you can have just too many IO
functions to choose from. The F877 is one such chip. Just because
it has ASYNC/SYNC serial IO, doesnt mean you *have* to use it. Hence,
code from lesser chips that do all that bit by bit (Bit/Bang) will still run
just fine.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>If you go and download the MPLAB toolsuit
(for free!) and the free but limited version of HiTech C compiler,
you'll be OK. Mind you, by now I expect the code has been ported to one
of Microchip's C compilers. There are dozens of others of
course.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Other choices, there are several PIC
based TNC's about, with freely available source code, both C and assembler,
also both regular packet, and APRS versions too.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>There is nothing wrong with the Atmel
chips, but the CPU architecure you could argue harks backwards in time, though
they can be very low power, and very fast running! And of
course if you have already worked with the Intel 805x series chips, the
learning curve could be relatively shallow.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>PIC's and RISC archetcture, looking
forward by comparison? You choose, based on what you have, and what you
can get for free!</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Have Fun..</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Dave G0WBX.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV></DIV>
<DIV dir=ltr><BR>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Andrew Rich
[mailto:vk4tec@tech-software.net]<BR><B>Sent:</B> Wed 24/01/2007
20:08<BR><B>To:</B> ozaprs; Aprssig<BR><B>Subject:</B> [aprssig] APRS
telemetry and the PIC 16F877A<BR></FONT><BR></DIV>
<DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2>Gudday</FONT></SPAN></DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial size=2>I know of the MIM
project, but I would like to issue a challenge to the
smarties.</FONT></SPAN></DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial size=2>I have a 16F877A,
which has at least 6 A/D and as many ports of logic.</FONT></SPAN></DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial size=2>What I want to do
is make the 16F877A PIC send APRS telem.</FONT></SPAN></DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial size=2>Anyone done it ?
Interested in coding it ?</FONT></SPAN></DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=265140320-24012007><FONT face=Arial
size=2>Andrew.</FONT></SPAN></DIV>
<P><FONT face=Arial size=2>-----------------------------------------<BR>Andrew
Rich<BR>Amateur radio callsign VK4TEC<BR>email: </FONT><A
href="mailto:vk4tec@tech-software.net"><FONT face=Arial
size=2>vk4tec@tech-software.net</FONT></A><BR><FONT face=Arial size=2>web:
http://www.tech-software.net<BR>Brisbane AUSTRALIA </FONT></P>
<DIV> </DIV></DIV>
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