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#!/bin/sh
# This script is intended to be used on MTAC-003V3 platform, it performs
# the following actions:
# - export/unpexort pioC9 and pioB12 used to reset the SX1302 chip and setup AP1_NRESET
# - export/unexport pioC10 used to reset the optional SX1261 radio used for LBT/Spectral Scan
#
# Usage examples:
# ./reset_lgw.sh stop
# ./reset_lgw.sh start
# GPIO mapping has to be adapted with HW
#
SX1302_RESET_PIN=73 # SX1302 reset
AP1_NRESET_PIN=44 # AP1_NRESET
SX1261_RESET_PIN=74 # SX1261 reset (LBT / Spectral Scan)
SX1302_RESET_pio=C9 # pio for SX1303 reset
AP1_NRESET_pio=B12 # pio for AP1_NRESET
SX1261_NRESET_pio=C10 # pio for SX1261 NRESET
WAIT_GPIO() {
sleep 0.1
}
init() {
# setup GPIOs
echo "$SX1302_RESET_PIN" > /sys/class/gpio/export; WAIT_GPIO
echo "$SX1261_RESET_PIN" > /sys/class/gpio/export; WAIT_GPIO
echo "$AP1_NRESET_PIN" > /sys/class/gpio/export; WAIT_GPIO
# set GPIOs as output
echo "out" > /sys/class/gpio/pio$SX1302_RESET_pio/direction; WAIT_GPIO
echo "out" > /sys/class/gpio/pio$SX1261_NRESET_pio/direction; WAIT_GPIO
echo "out" > /sys/class/gpio/pio$AP1_NRESET_pio/direction; WAIT_GPIO
}
reset() {
# write output for AP1_NRESET and SX1303 reset
echo "1" > /sys/class/gpio/pio$AP1_NRESET_pio/value; WAIT_GPIO
echo "1" > /sys/class/gpio/pio$SX1302_RESET_pio/value; WAIT_GPIO
echo "0" > /sys/class/gpio/pio$SX1302_RESET_pio/value; WAIT_GPIO
echo "0" > /sys/class/gpio/pio$SX1261_NRESET_pio/value; WAIT_GPIO
echo "1" > /sys/class/gpio/pio$SX1261_NRESET_pio/value; WAIT_GPIO
}
term() {
# cleanup all GPIOs
if [ -d /sys/class/gpio/pio$SX1302_RESET_pio ]
then
echo "$SX1302_RESET_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
fi
if [ -d /sys/class/gpio/pio$SX1261_NRESET_pio ]
then
echo "$SX1261_RESET_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
fi
if [ -d /sys/class/gpio/pio$AP1_NRESET_pio ]
then
echo "$AP1_NRESET_PIN" > /sys/class/gpio/unexport; WAIT_GPIO
fi
}
case "$1" in
start)
term # just in case
init
reset
;;
stop)
reset
term
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
;;
esac
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