[arm-allstar] HamVoIP I/O support - What is Best Current Practice for implementing I/O?

Tue Jan 16 23:34:22 EST 2018

LLoyd,

  I had my logic wrong. Forget the diodes and just direct connect as long
as the input bits on the radio are 3V or 5V TTL which I suspect they are.
If the inputs are pulled up to something more than that then 5V some level
translation will have to be used. The inputs may not even have pullups in
which case they will just be floating which will be fine. Check it.

*73 Doug*

*WA3DSP*

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

On Tue, Jan 16, 2018 at 10:22 PM, "Lloyd Duck via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> Thank you Doug, I’ll get in installed tomorrow.
>
>
> Lloyd Duck, W5LND
>
> On Jan 16, 2018, at 9:13 PM, Doug Crompton <wa3dsp at gmail.com> wrote:
>
> Lloyd,
>
> OK attached is the modified script to use the USB FOB for control. You now
> have the option of Pi GPIO using the bcd_control.sh script or the FOB using
> bcd_control_usb.sh  script.  I am attaching the later.
>
> Here is a sample of the output -
>
> ./bcd_control_usb.sh 1
> Entered Channel 1
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO1=1"
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO2=0"
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO4=0"
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO5=0"
>
> ./bcd_control_usb.sh 5
> Entered Channel 5
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO1=1"
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO2=0"
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO4=1"
> Executing - /bin/asterisk -rx "rpt cmd  cop 61 GPIO5=0"
>
> Note - you MUST initialize these bits in /etc/asterisk/simpleusb.conf
> like this in the stanza for the USB you are using and restart or reboot -
>
> gpio1=out0 ; in, out0 or out1
> gpio2=out0
> gpio4=out0
> gpio5=out0
>
> See the DMK-URI or whatever CM119x FOB you are using for bit pin outs.
>
> This is then sent to Asterisk to perform the action. I have tested that
> this does control the bits but not as a package so you need to test. Once
> this is proven I will probably put both of these scripts out as a general
> update for all and also do a howto on it.
>
> Please get back to me with how you make out.
>
> 73 Doug
> WA3DSP
> http://www.crompton.com/hamradio
>
>
> > On Tue, Jan 16, 2018 at 8:28 PM, Lloyd Duck <lduck at me.com> wrote:
> > Oh ok that’s why it’s now changing the USB FOB bits. Thank you..
> >
> >
> >
> > Yes the FOB I’m using is a CM119.
> >
> >
> >
> > Do you have any guidance how to modify the script to control the FOB I/O
> bits? I’m lost on that step.
> >
> >
> >
> >
> >
> > Lloyd Duck
> >
> > W5LND
> >
> >
> >
> > From: Doug Crompton [mailto:wa3dsp at gmail.com]
> > Sent: Tuesday, January 16, 2018 7:09 PM
> > To: Lloyd Duck <lduck at me.com>
> > Subject: Re: [arm-allstar] HamVoIP I/O support - What is Best Current
> Practice for implementing I/O?
> >
> >
> >
> > This script changes the Pi GPIO bits NOT the USB FOB bits. The bits and
> pin numbers on the Pi GPIO are shown. The GPIO readall is a visual monitor
> of those bits. The Pi bits chosen are the recommended ones to use but that
> can be changed in the script.  If you want to control the FOB I/O bits
> first of all you need a CM119x FOB chip as the CM108 does not have enough
> bits. You also need to modify the script to control the FOB I/O bits and
> not the Pi I/O bits. Either would work. The Pi GPIO might be more reliable
> and more transportable as if the FOB was changed out it would have to be
> both a CM119x and have the bits brought out.
> >
> >
> >
> > 73 Doug
> >
> > WA3DSP
> >
> > http://www.crompton.com/hamradio
> >
> >
> >
> >
> >
> > On Tue, Jan 16, 2018 at 7:37 PM, Lloyd Duck <lduck at me.com> wrote:
> >
> > Doug,
> >
> > I wasn’t able to get your script to work, any idea what I may be doing
> work?
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > From: arm-allstar [mailto:arm-allstar-bounces at hamvoip.org] On Behalf Of
> "Doug Crompton via arm-allstar"
> > Sent: Friday, January 12, 2018 11:50 AM
> > To: ARM Allstar <arm-allstar at hamvoip.org>
> > Cc: Doug Crompton <wa3dsp at gmail.com>
> > Subject: Re: [arm-allstar] HamVoIP I/O support - What is Best Current
> Practice for implementing I/O?
> >
> >
> >
> > Randy,
> >
> >
> >
> >  Attached is the bcd_control.sh script. It controls 16 channels or 4
> bits. It has a strobe on a 5th bit that can be ignore if not needed. Here
> is and example running it at the linux prompt -
> >
> >
> >
> > ./bcd_control.sh 2
> > Entered Channel 2
> > Channel 2 written to BCD - 0010
> >
> >
> >
> > and just a portion of a 'gpio readall' showing the bits
> >
> >
> >
> >  |   5 |  21 | GPIO.21 |  OUT | 0 | 29
> >  |   6 |  22 | GPIO.22 |  OUT | 1 | 31
> >  |  13|  23 | GPIO.23 |  OUT | 0 | 33
> >  |  19|  24 | GPIO.24 |  OUT | 0 | 35
> >  |  26|  25 | GPIO.25 |  OUT | 0 | 37
> >
> >
> >
> > To control from Allstar here is one way to do it. Add to the functions
> stanza, assumes the script is in /etc/asterisk/local. Make sure the script
> is executable - chmod 750 bcd_control.sh. Run it manually as above to
> confirm. You only need to enter functions for as many channels as you have.
> In your case 3 bits or 8 channels. The script was not written for a
> Motorola but it should work fine.
> >
> >
> >
> > 801=cmd,/etc/asterisk/local/bcd_control.sh 1
> >
> > 802=cmd,/etc/asterisk/local/bcd_control.sh 2
> >
> > 803=cmd,/etc/asterisk/local/bcd_control.sh 3
> > 804=cmd,/etc/asterisk/local/bcd_control.sh 4
> >
> > 805=cmd,/etc/asterisk/local/bcd_control.sh 5
> > 806=cmd,/etc/asterisk/local/bcd_control.sh 6
> > 807=cmd,/etc/asterisk/local/bcd_control.sh 7
> > 808=cmd,/etc/asterisk/local/bcd_control.sh 8
> >
> > 809=cmd,/etc/asterisk/local/bcd_control.sh 9
> > 810=cmd,/etc/asterisk/local/bcd_control.sh 10
> > 811=cmd,/etc/asterisk/local/bcd_control.sh 11
> > 812=cmd,/etc/asterisk/local/bcd_control.sh 12
> >
> >
> >
> > etc....
> >
> >
> >
> > Another way to do this is use the autopatch in command mode. Then you
> just need one line in rpt.conf  and a custom extensions.conf stanza. See
> the howto on the hamvoip.org web page.
> >
> >
> >
> > https://www.hamvoip.org/Allstar_extended_functions_using_autopatch.pdf
> >
> >
> >
> > Again - VERY IMPORTANT! The Pi is 3V GPIO logic. Use diodes pointed
> towards the radio on each line. You may possibly need to use pullups on the
> radio side of the diode if the radio does not supply them. The radio lines
> probably float high. If they do that won't be necessary.. You also need a
> ground connection between the radio and the Pi. This could be Pi pin 37 or
> any defined 0V pin.
> >
> >
> >
> > 73 Doug
> >
> > WA3DSP
> >
> > http://www.crompton.com/hamradio
> >
> >
> >
> >
> >
> >
> >
> > On Fri, Jan 12, 2018 at 2:53 AM, "Randy Neals via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
> >
> > Hi,
> >
> > What is the best current practice for implementing I/O on a Raspberry Pi
> to
> > control external things.
> > In this case, remote channel selection on a VHF remote base, a radio
> with 8
> > channels and having external control lines.
> >
> > From looking through the list archives, I see references to using an
> > Arduino Nano, and at an earlier time, using a USB I/O board from
> SparkFun,
> > and of course using the lines on the RPi itself.
> >
> > Anticipated questions...
> >
> > Q. What Am I trying To Do?
> > A. Control channel select lines on a VHF remote base station.
> >
> > Q. What format/How many lines?
> > A. 3 logic control lines. The lines are normally pulled up to +5V by the
> > radio.
> >      BCD format with the lines having binary weighting of 4, 2, and 1
> > respectively.
> >      High = weighted value / Low = zero value.
> >
> > Q. What audio interface will I use?
> > A. Simple USB, likely DMK URI. (But I could use a USB FOB, or other
> > interface if there is one with I/O)
> >
> > Thanks,
> > Randy
> > W3RWN
> > _______________________________________________
> >
> > 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
> >
> >
> >
> >
> >
>
> <bcd_control_usb.sh>
> _______________________________________________
>
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>
> Visit the BBB and RPi2/3 web page - http://hamvoip.org