120 lines
2.8 KiB
Bash
120 lines
2.8 KiB
Bash
#!/bin/bash/
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#
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# library based on work by: @author Raoul R., 2016
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#
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# LOG_LEVEL ... DEBUT | INFO
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LOG_LEVEL="DEBUG"
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TRUE=1
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FALSE=0
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# $1 ... message
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# debug log
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function log() {
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if [ "$LOG_LEVEL" = "DEBUG" ] ; then
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local message=$1
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logger -t "PME" "$message"
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fi
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}
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# $1 ... message
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# more verbose information logging
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function logInfo() {
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local message=$1
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logger -t "PME" "$message"
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}
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# $1 ... message
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function shutdownCommand() {
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logInfo "$1"
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cleanupGpioInputButton
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setLed 1
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shutdown -h 0 &
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exit 0
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}
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# @return ... 0,1 as return value
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function isBatteryAvailable() {
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local flags=$(i2cget -f -y 0 0x34 0x01)
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return $(((( $flags&0x20 ) >>5 ) == $TRUE ))
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}
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# @return ... voltage as string
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function getBatteryVoltage() {
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local voltageHighByte=$(i2cget -y -f 0 0x34 0x78)
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local voltageLowByte=$(i2cget -y -f 0 0x34 0x79)
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local rawVoltage=$(($(($voltageHighByte << 4)) | $(($(($voltageLowByte & 0x0F ))))))
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echo "($rawVoltage * 1.1)" | bc
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}
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# @return ... charging current as string
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function getChargeCurrent() {
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local currentHighByte=$(i2cget -f -y 0 0x34 0x7A)
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local currentLowByte=$(i2cget -f -y 0 0x34 0x7B)
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local rawCurrent=$(($(($currentHighByte << 4)) | $(($(($currentLowByte & 0x0F))))))
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echo "($rawCurrent * 0.5)" | bc
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}
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# shuts the system down if too less voltage
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function verifyBatteryVoltage() {
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echo "$(isBatteryAvailable)"
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if [ "$?" -eq "1" ] ; then
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local voltage=$(getBatteryVoltage)
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local chargeCurrent=$(getChargeCurrent)
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echo "Voltage: $voltage"
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echo "Charge Current: $chargeCurrent"
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#log "battery charge current [${chargeCurrent}mV] min current [${SHUTDOWN_MIN_BATTERY_CURRENT}mV]"
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#if [ $(echo "$voltage <= $SHUTDOWN_MIN_BATTERY_VOLTAGE" | bc) -eq "1" ] ; then
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# log "critical battery voltage [${voltage}mV] min voltage [${SHUTDOWN_MIN_BATTERY_VOLTAGE}mV]"
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# if [ $(echo "$chargeCurrent <= $SHUTDOWN_MIN_BATTERY_CURRENT" | bc) -eq "1" ] ; then
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# shutdownCommand "shutting down due to low voltage/charge current"
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# fi
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# return
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#fi
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#log "battery voltage [${voltage}mV] min voltage [${SHUTDOWN_MIN_BATTERY_VOLTAGE}mv]"
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fi
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}
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# $1 ... led state (0,1)
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function setLed() {
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if [ "$1" -eq "1" -o "$1" -eq "0" ] ; then
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/usr/sbin/i2cset -f -y 0 0x34 0x93 0x$1
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fi
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}
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# @return ... true if button pressed else false as return value
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function isButtonPressed() {
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local value=$(cat ${POWER_BUTTON_GPIO}/value)
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if [ "$value" -eq "0" ] ; then
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shutdownCommand "shutdown on button pressed"
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fi
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}
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function verifyButton() {
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isButtonPressed
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if [ "$?" -eq "1" ] ; then
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shutdownCommand "shutdown on power button request"
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fi
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}
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function main() {
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setupGpioInputButton
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while true ; do
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setLed 1
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verifyBatteryVoltage
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setLed 0
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sleep 3
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done
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}
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# start monitoring in subshell and nonblocking
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$(main)
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#exit 0
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