57 lines
1.1 KiB
Bash
57 lines
1.1 KiB
Bash
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#!/bin/sh
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. ./init_functions.sh
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BLINK_INTERVAL=2 # seconds
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VIBRATION_DURATION=400 #ms
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VIBRATION_INTERVAL=2 #s
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find_leds() {
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find /sys -name "max_brightness" | xargs -I{} dirname {}
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}
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find_vibrator() {
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echo /sys/class/timed_output/vibrator
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}
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# blink_leds takes a list of LEDs as parameters,
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# it iterates over every LED, and changes their value,
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# alternating between max_brightness and 0 every BLINK_INTERVAL
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blink_leds() {
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state=false # false = off, true=on
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while true; do
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for led in $@; do
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if [ "$state" = true ]; then
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cat $led/max_brightness > $led/brightness
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else
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echo 0 > $led/brightness
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fi
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echo blinking LED: $led
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done
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sleep ${BLINK_INTERVAL}s
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if [ "$state" = true ]; then
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state=false
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else
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state=true
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fi
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done
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}
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# vibrate_loop vibrates each VIBRATION_INTERVAL for VIBRATION_DURATION
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# it takes a timed_device path to the vibrator as $1
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vibrate_loop() {
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if [ ! -f $1/enable ]; then
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return;
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fi
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while true; do
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echo $VIBRATION_DURATION > $1/enable
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sleep ${VIBRATION_INTERVAL}s
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done
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}
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blink_leds $(find_leds) &
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vibrate_loop $(find_vibrator) &
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loop_forever
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