Merge pull request #56 from brain-hackers/buildroot-experiment

Enhance buildroot rootfs
This commit is contained in:
Takumi Sueda 2023-07-31 22:24:07 +09:00 committed by GitHub
commit 68e6e1091e
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2 changed files with 113 additions and 1 deletions

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Subproject commit e39044fa44394042e22f503fb53ba96122956bce Subproject commit cf3ea901082f470449bd174272d8407e039522b2

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#!/bin/sh
set -u
VERBOSE=0
PIN=""
SLEEP=1
GPIOS=""
while getopts "hvr:p:s:" OPT; do
case "$OPT" in
h)
echo "Usage: blink.sh [-hv] [-r PIN_RANGE_FROM-PIN_RANGE_TO] [-p PIN] [-s SLEEP_SEC]"
echo "Example: blink.sh -r 0-10 -p 12"
echo " (blink from GPIO 0 to 10 and 12)"
exit 0
;;
v)
VERBOSE=1
;;
r)
RE='^([0-9]+)-([0-9]+)$'
if echo $OPTARG | grep -qvE $RE; then
echo "Error: invalid range: $OPTARG"
exit 1
fi
FROM=$(echo $OPTARG | sed -E "s/$RE/\\1/")
TO=$(echo $OPTARG | sed -E "s/$RE/\\2/")
GPIOS="$GPIOS$(seq -s " " $FROM $TO) "
;;
p)
if echo $OPTARG | grep -qvE "^[0-9]+$"; then
echo "Error: invalid pin number: $OPTARG"
exit 1
fi
GPIOS="$GPIOS$OPTARG "
;;
s)
if echo $OPTARG | grep -qvE "^[0-9]+$"; then
echo "Error: invalid sleep duration: $OPTARG"
exit 1
fi
SLEEP=$OPTARG
;;
esac
done
if [ $VERBOSE -eq 1 ]; then
echo "Pins to iterate over: $GPIOS"
fi
if [ "$(id -u)" -ne "0" ]; then
echo "Error: please run as root"
exit 1
fi
AVAILABLE_GPIOS=""
export_gpio() {
echo $1 > /sys/class/gpio/export
}
set_direction() {
echo out > /sys/class/gpio/gpio$1/direction
}
set_value() {
echo $2 > /sys/class/gpio/gpio$1/value
}
for i in $GPIOS; do
if [ ! -e "/sys/class/gpio/gpio$i" ]; then
export_gpio $i 2>/dev/null
if [ $? -ne 0 ]; then
echo "Error: failed to export the pin $i"
continue
fi
fi
set_direction $i 2>/dev/null
if [ $? -ne 0 ]; then
# Ignore the failure if the actual direction is out
if grep -vq "out" /dsys/class/gpio/gpio$i/direction; then
echo "Error: failed to set the direction of the pin $i to out"
continue
fi
fi
AVAILABLE_GPIOS="$AVAILABLE_GPIOS$i "
done
echo "Available GPIOs: $AVAILABLE_GPIOS"
while [ 1 ]; do
for i in $AVAILABLE_GPIOS; do
set_value $i 1 2>/dev/null
if [ $? -ne 0 ]; then
echo "Warning: failed to set the value of the pin $i to high"
fi
done
sleep $SLEEP
for i in $AVAILABLE_GPIOS; do
set_value $i 0 2>/dev/null
if [ $? -ne 0 ]; then
echo "Warning: failed to set the value of the pin $i to low"
fi
done
sleep $SLEEP
done