[arm-allstar] Help Radio to GPIO Channel Select

Sun Jul 30 20:22:28 EST 2017

Sam,

 The bcd_control script does hold the lines in the prescribed state.
Decimal 1 = 1000 , Decimal 16 = 1111, etc.  The strobe bit is a separate
bit that goes high or low for the strobe period. As I said you can ignore
it or comment out those lines. The data lines hold to what ever you set
them to. Try it as I described and you will see from the gpio readall.

*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Sun, Jul 30, 2017 at 9:00 PM, "Sam Skolfield via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> Rad! I was actually about to ask you about doing this too!
>
> My friend has a CDM and a beaglebone and he wants me to set him up a little
> node that behaves like a remote base. He wants something where he can dial
> up his node on his IAX client, and change channels with macros. He'll be
> using a CDM with 15 channels via 4 lines.
>
> With the CDMs, the lines are grounded and held to ground for channel
> select. They recognize transitions, not pulses. Could yourcode be tweaked
> for this? The CDM/ Radius/GM300 is a very popular node radio as you know,
> and I'm sure many people would love to have such a script available!
>
> Thanks
> -SS
>
>
> On Sun, Jul 30, 2017 at 3:50 PM "Doug Crompton via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > Bobby,
> >
> >  Attached is a bash script I wrote some time ago to write the GPIO with
> BCD
> > data given decimal data input. The bits selected are 21, 22, 23, 24. Give
> > it a try. The format is:
> >
> > bcd_control.sh <channel 1-16>  ....  Just the channel number No brackets.
> >
> > Also remember to execute a script it must be executable - if it is not
> do -
> > chmod 750 bcd_control.sh    and if executing it in the current directory
> do
> > - ./bcd_control.sh
> >
> > After you execute it will tell you what it did. Then at the Linux prompt
> > type:
> >
> > gpio readall
> >
> > You will get a chart of the I/O bits. Bits 21, 22, 23, 24 will show the
> BCD
> > representation of the decimal channel you entered.
> >
> > This also includes a strobe bit because the system I was writing it for
> > required that. You can ignore it if you don't need it. It is bit 25 for
> > 100ms.
> >
> > You can see how this could be implemented as DTMF functions or better yet
> > using the autopatch through extensions.conf. See the howto on that on the
> > hamvoip.org web page. Also the howto on GPIO.
> >
> > Using the autopatch method a DTMF like *6201  through *6216  could change
> > the 16 channels.
> >
> > Any yes this could be done in supermon but first you need to understand
> > this part of it and get it working. You need to interface those 4 bits to
> > the radio and manually execute this command.
> >
> > Here is a link from this forum January 2016 about this -
> >
> > http://lists.hamvoip.org/pipermail/arm-allstar/2016-January/002637.html
> >
> >
> > *73 Doug*
> >
> > *WA3DSP*
> >
> > *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> >
> >
> > On Sun, Jul 30, 2017 at 1:27 PM, "Bobby Bruton via arm-allstar" <
> > arm-allstar at hamvoip.org> wrote:
> >
> > > I need some assistance, I have a challenge, I have a dual node setup
> > > running Comptons's latest release in a Pi3.Using Motorola CDM
> commercial
> > > Radios with URI interfaces, everything is running fine, but I want to
> use
> > > the channel controll built into the AUX pin assignment in the radio
> that
> > > part I have no problem assigning the pins in the radio,you can only do
> 4
> > > channels per radio in channel select aux io pin assignment which is
> > > fine.Let me get to the piont.I have 2 Radios, I wanna be able to go to
> > > Supermon have a drop down menu that will let me use the GPIO to select
> > > channels on the radios,independently, which will give me a latchd hi or
> > > latched open output. example of DROP DOWN in supermon would look
> similar
> > to
> > > this
> > > VHFCH1 on or off CH2 on or offCh3 on or offCh4 on or off
> > > UHFCh1 on or offCh2 on or offCH3 on or offCh4 on or off
> > >
> > > and if possable to change the name of CH to say, like ex,  My Repeater
> on
> > > or off
> > >                        Johns Repeater on or off
> > >                                                                  ETC
> > > "I am not good with command line so this will have to be eather a file
> I
> > > can copy and paste to a directory or directory's
> > > or written as a how to guide for dummies. step by step line by line"
> > > Many thanks Hope you guys are up to the challange 73's BobAG5BB
> > > _______________________________________________
> > >
> > > arm-allstar mailing list
> > > arm-allstar at hamvoip.org
> > > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > >
> > > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> > _______________________________________________
> >
> > arm-allstar mailing list
> > arm-allstar at hamvoip.org
> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >
> > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> >
> --
> KJ6QFS
> Sam Skolfield
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>
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>
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>
>