<div dir="ltr"><div>For a GM300 you supply a GND trigger to one or more of the 4 channel steering pins. The pins have to stay grounded to stay on the channel you selected, if you release the triggers the radio reverts back to whatever channel you last manually selected with the channel up/down button.<br><br></div>Example in this link: <a href="http://www.repeater-builder.com/motorola/maxtrac/remote-channel-select.html">http://www.repeater-builder.com/motorola/maxtrac/remote-channel-select.html</a><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jan 20, 2016 at 2:04 PM, Doug Crompton <span dir="ltr"><<a href="mailto:doug@crompton.com" target="_blank">doug@crompton.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div dir="ltr"><font color="#000000" face="Tahoma,sans-serif">Ed,<br><br> OK fine. I can supply an example if you want but I was wondering what they wanted to see. Do you set the four lines BCD and then strobe another pin to load it? That is often the way it is done or maybe it just monitors the lines for them being stable and switches?<br></font><span class=""><br><b><font style="font-size:16pt" size="4">73 Doug</font><font style="font-size:16pt" size="4"><br></font><font style="font-size:16pt" size="4">WA3DSP</font><font style="font-size:16pt" size="4"><br></font><font style="font-size:16pt" size="4"><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a></font></b><font style="font-size:16pt" size="4"><br></font><br><br></span><div><span class=""><hr>To: <a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>From: <a href="mailto:vacuumtubesforever@gmail.com" target="_blank">vacuumtubesforever@gmail.com</a><br></span>Date: Wed, 20 Jan 2016 16:44:27 -0500<div><div class="h5"><br>Subject: Re: [arm-allstar] Remote Base BCD Channel Steering<br><br>
<div>Doug,<br>
<br>
Nothing fancy, just 16 channel stuff. GM300, Maxtracs, Kenwood 90
series stuff. Just got to yank the lines low. <br>
<br>
Ed<br>
<br>
On 1/20/2016 11:14 AM, Doug Crompton wrote:<br>
</div>
<blockquote>
<div dir="ltr"><font color="#000000" face="Tahoma,sans-serif">Ed,<br>
<br>
What is the format of the BCD control you are wanting? 16
channels - 0001 - 1111 ??</font> <font face="Tahoma,sans-serif"> Does the radio take TTL levels? Is
there a strobe bit once the other bits are setup?</font><font face="Tahoma,sans-serif"><br>
</font><br>
<b><font style="font-size:16pt" size="4">73 Doug</font><font style="font-size:16pt" size="4"><br>
</font><font style="font-size:16pt" size="4">WA3DSP</font><font style="font-size:16pt" size="4"><br>
</font><font style="font-size:16pt" size="4"><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a></font></b><font style="font-size:16pt" size="4"><br>
</font><br>
<br>
<div>
<hr>To: <a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>
From: <a href="mailto:vacuumtubesforever@gmail.com" target="_blank">vacuumtubesforever@gmail.com</a><br>
Date: Wed, 20 Jan 2016 06:31:55 -0500<br>
Subject: Re: [arm-allstar] Remote Base BCD Channel Steering<br>
<br>
<div>Hi Doug,<br>
<br>
Never did get a response. Was trying to avoid reinventing
the wheel.<br>
<br>
Never thought of using the patch command to do DTMF stuff.
Will do some investigating.<br>
That's the cool thing about Allstar/Asterisk, if you can
think of something, there's usually a way to do it.<br>
<br>
All your efforts are really appreciated.<br>
<br>
Ed W8VT<br>
<br>
On 1/19/2016 9:21 PM, Doug Crompton wrote:<br>
</div>
<blockquote>
<div dir="ltr"><font color="#000000" face="Tahoma,sans-serif">Ed,<br>
<br>
In researching I saw you asked the same question years
ago and I did not see an answer then. Did you ever get
one?<br>
<br>
<a href="http://lists.allstarlink.org/pipermail/app_rpt-users/2013-February/005962.html" target="_blank">http://lists.allstarlink.org/pipermail/app_rpt-users/2013-February/005962.html</a><br>
<br>
Using the GPIO on the Pi to BCD control a radio would
not be hard. In fact a user has already done that using
function codes and an external script I wrote to control
the bits. It is in use commercially. <br>
<br>
The idea for the future code we are writing is to get
specific stuff out of the base code and put it where
users can create their own interfaces to whatever
hardware they want.<br>
<br>
Here are the basics of how I would do it....<br>
<br>
Use the patch command (with a different code) to pass
DTMF to a Linux script via an extensions.conf dial plan.<br>
Then the script would take the number sent, convert it
to BCD or any other format the radio requires<br>
and send it to the GPIO bits. Of course you would have
to interface those bits to the actual hardware.<br>
</font><br>
<font face="Tahoma,sans-serif">If you needed to
pass a code to a remote node you would use the standard
codes to pass the command to the remote nodes dial plan.</font><br>
<br>
<b><font style="font-size:16pt" size="4">73 Doug</font><font style="font-size:16pt" size="4"><br>
</font><font style="font-size:16pt" size="4">WA3DSP</font><font style="font-size:16pt" size="4"><br>
</font><font style="font-size:16pt" size="4"><a href="http://www.crompton.com/hamradio" target="_blank"></a><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a></font></b><font style="font-size:16pt" size="4"><br>
</font><br>
<br>
<div>> To: <a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>
> From: <a href="mailto:vacuumtubesforever@gmail.com" target="_blank">vacuumtubesforever@gmail.com</a><br>
> Date: Tue, 19 Jan 2016 20:04:16 -0500<br>
> Subject: [arm-allstar] Remote Base BCD Channel
Steering<br>
> <br>
> Is this supported with the current image? If so,
anyone know the <br>
> details, what gpio pins, etc?<br>
> <br>
> Tnx<br>
> <br>
> Ed W8VT<br>
> Beckley WV<br>
> Nodes 27849, 29496, 29982<br>
> _______________________________________________<br>
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