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SVXlink_with_RPITX
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Create SvxTX.sh 

This Scrpt is use to switch on RPITX when svxlink what TX.
It's a active wait ... I'm sure we can di better in python to detect State change on GPIO
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F1TZO 2019-05-23 00:39:56 +02:00 committed by GitHub
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#!/bin/bash
########################################################################
# #
# Pour la detection du passage en TX et l activation de rpitx de F5OEO #
# To detect when svxlink switch to TX and active F5OEO rpitx #
# #
# Detection sur GPIO 20 pour lire l etat du 21 (TX de svxlink) #
# Detection GPIO, 20 to read state of 21 (svxlink TX) #
# By Michel - F1TZO #
# #
########################################################################
########################################################################
# #
# Prerequis : rpitx est installe : voir le github de F5OEO #
# Prerequisites : rpitx is installed : see F5OEO github #
# #
# Et ne pas oublier de d initialiser les GPIO dans le /etc/rc.local #
# And don't forget to declare the GPIO init in /etc/rc.local #
# #
# # svxlinkx GPIO 21:PTT - GPIO 20:read TX State #
# echo "21" > /sys/class/gpio/export & #
# sleep 2 #
# echo out > /sys/class/gpio/gpio21/direction #
# #
# # Read TX State #
# echo "20" > /sys/class/gpio/export & #
# sleep 2 #
# echo in > /sys/class/gpio/gpio20/direction #
# #
# #
# ET NE PAS OUBLIER LE CAVALIER ENTR ENTRE LES GPIO 20 et 20 #
# donc entre les PIN 38 et 40 #
# #
# AND DON T FORGET TO ADD JUMPER BETWWEN GPIO 20 and 21 #
# So between PIN 38 and 40 #
# #
########################################################################
while true
do
STATE=$(cat /sys/class/gpio/gpio20/value)
if [ $STATE -eq 1 ]; then
echo "EN TX"
arecord -c1 -r48000 -fS16_LE - | nc -l -u 1233 | csdr convert_i16_f | csdr gain_ff 7000 | csdr convert_f_samplerf 20833 | sudo rpitx -i - -m RF -f 145400 & export RPITX_PID=$!
gpio -g wfi 20 both
ASOUND_PID=$(ps ax | grep arecord | grep -v grep | awk '{ print $1 }')
echo "ASOUNDPID="$ASOUND_PID
echo "KILL PID : " $RPITX_PID " " $ASOUND_PID
kill -15 $RPITX_PID $ASOUND_PID
/root/stop_tx.sh
sleep 0.4
STATE=$(cat /sys/class/gpio/gpio20/value)
fi
done