[arm-allstar] RGB LED RPI

Mon Oct 9 15:19:54 EST 2017

Thanks for all the help. I will need to read up on software code as its 
not something I have done before.

Tom

> "Doug Crompton via arm-allstar" <mailto:arm-allstar at hamvoip.org>
> 08 October 2017 23:59
> Just want to make sure you were aware you do not have to use 'c' or 
> compile
> anything to use wiring pi. It has direct Linux commands....
>
> https://www.hamvoip.org/GPIO_how-to.pdf
>
> A note of caution when using Pi IO. While it is fun to play with GPIO be
> careful about bringing wires in and out of a Pi. You can introduce EMI 
> that
> can both effect radios on the outside and also cause stability issues on
> the Pi due to outside RF or EMI getting in. This is especially true in 
> high
> RF environments. Also the RPI GPIO pins can never have more than 3.3 volts
> applied to them.
>
> As i stated earlier both the RX and TX bits are available at the USB 
> FOB if
> configured. The USB FOB I/O is 5V TTL.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
> On Sun, Oct 8, 2017 at 4:32 PM, "Peter via arm-allstar" <
> _______________________________________________
>
> 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
> "Peter via arm-allstar" <mailto:arm-allstar at hamvoip.org>
> 08 October 2017 21:32
> Tom,
>
> I use the events subsystem and the wiring Pi library.
>
> The key thing here is a few entries in rpt.conf
>
> ;
> :
>
> [events]
> /usr/local/sbin/1low = s|t|RPT_TXKEYED
> /usr/local/sbin/1high = s|f|RPT_TXKEYED
> /usr/local/sbin/0low = s|t|RPT_RXKEYED
> /usr/local/sbin/0high = s|f|RPT_RXKEYED
>
> ;
> ;
>
> Going to and from an event like RX(COS) keyed or unkeyed will fire off 
> a shell command, in my case a 4 applications to toggle to state of 
> GPIO pins.
>
>
> Here is the source of the application to toggle GPIO 0 LOW, edit as 
> needed for each pin/state.
>
> #include <wiringPi.h>
> #include <stdlib.h>
> int main (void)
> {
> wiringPiSetup () ;
> pinMode (0, OUTPUT) ;
>
> {
> digitalWrite (0, LOW) ;
> }
> exit (0) ;
> }
>
>
> To compile:
>
>
> gcc -Wall -o 0low 0low.c -lwiringPi
>
>
> Do the same for the other 3 stats/pins.
>
> The LED is an RGB 'common anode' supplied from the 3.3v rail via a 10k 
> resistor. Here is a close up of the LED, just a bit of matrix board 
> and some header pins. 
> https://www.flickr.com/photos/127794264@N08/36908775383/
>
> Yes, there are other ways of doing it, either controlling the GPIO 
> pins or driving the LED from hardware external to the Pi. This is how 
> I do it which is simple and with reproducible results.
>
> HTH
>
> 73
> Peter
> G7RPG
>
>
>
> On 08/10/2017 20:24, "TomXtal via arm-allstar" wrote:
> Thanks for your input Doug. I have watch a youtube of Peter Kendall 
> G7RPG of his micro node 
> www.youtube.com/watch?v=CTIgOlsq9jI<http://www.youtube.com/watch?v=CTIgOlsq9jI> 
> which uses a status LED, this is what I'm trying to do. I can see it 
> is wire to the GPIO pins but I can not see which pins are being used.
>
> Tom
>
> "Doug Crompton via arm-allstar" 
> <mailto:arm-allstar at hamvoip.org><mailto:arm-allstar at hamvoip.org>
> 08 October 2017 19:27
> Tom,
>
> You did not say what you want the LED to indicate but I suspect that the
> node is transmitting and receiving? There are no pins on the RPI that
> indicate TX/RX status. TXD and RXD are serial port pins that send digital
> data. All pins on the Pi are 3.3V max also.
>
> The PTT indication is available on the USB FOB. Most FOBS have an LED
> indicating this. If not the PTT line could be used as a pull down for an
> LED wired to +5V through an appropriate resistor.
>
> For RX the COS signal can be programmed to raise or lower an unused bit on
> the FOB - see the txctcss howto on the hamvoip web page. You also could do
> this with hardware and build a little circuitry to use the COS line to 
> turn
> on the LED. This could need to be inverted depending on how your radio 
> uses
> the COS line.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio 
> <http://www.crompton.com/hamradio><http://www.crompton.com/hamradio>*
>
>
>
>
> On Sun, Oct 8, 2017 at 2:15 PM, "TomXtal via arm-allstar" <
> _______________________________________________
>
> arm-allstar mailing list
> arm-allstar at hamvoip.org<mailto: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
> "TomXtal via arm-allstar" 
> <mailto:arm-allstar at hamvoip.org><mailto:arm-allstar at hamvoip.org>
> 08 October 2017 19:15
> I have build a Allstar node with RPI 3 which works just fine. What I 
> would like to do is have a status LED using a RBG LED, I would like to 
> know which GPIO pins to use. I know i can use pin 2 or 4 for power no 
> but do not know which pins for TX and RX maybe pin 8 (TXD) and pin 10 
> (RXD). So I need some advice.
>
> Tom
> _______________________________________________
>
> arm-allstar mailing list
> arm-allstar at hamvoip.org<mailto: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<mailto: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
> TomXtal <mailto:tomxtal at gmail.com>
> 08 October 2017 20:24
> Thanks for your input Doug. I have watch a youtube of Peter Kendall 
> G7RPG of his micro node www.youtube.com/watch?v=CTIgOlsq9jI which uses 
> a status LED, this is what I'm trying to do. I can see it is wire to 
> the GPIO pins but I can not see which pins are being used.
>
> Tom
>
>
> "Doug Crompton via arm-allstar" <mailto:arm-allstar at hamvoip.org>
> 08 October 2017 19:27
> Tom,
>
> You did not say what you want the LED to indicate but I suspect that the
> node is transmitting and receiving? There are no pins on the RPI that
> indicate TX/RX status. TXD and RXD are serial port pins that send digital
> data. All pins on the Pi are 3.3V max also.
>
> The PTT indication is available on the USB FOB. Most FOBS have an LED
> indicating this. If not the PTT line could be used as a pull down for an
> LED wired to +5V through an appropriate resistor.
>
> For RX the COS signal can be programmed to raise or lower an unused bit on
> the FOB - see the txctcss howto on the hamvoip web page. You also could do
> this with hardware and build a little circuitry to use the COS line to 
> turn
> on the LED. This could need to be inverted depending on how your radio 
> uses
> the COS line.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
>
>
> On Sun, Oct 8, 2017 at 2:15 PM, "TomXtal via arm-allstar" <
> _______________________________________________
>
> 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
> "TomXtal via arm-allstar" <mailto:arm-allstar at hamvoip.org>
> 08 October 2017 19:15
> I have build a Allstar node with RPI 3 which works just fine. What I 
> would like to do is have a status LED using a RBG LED, I would like to 
> know which GPIO pins to use. I know i can use pin 2 or 4 for power no 
> but do not know which pins for TX and RX maybe pin 8 (TXD) and pin 10 
> (RXD). So I need some advice.
>
> Tom
> _______________________________________________
>
> 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