237 lines
5.4 KiB
Bash
Executable File
237 lines
5.4 KiB
Bash
Executable File
#/bin/bash
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#Original by ShadowJK. http://enivax.net/jk/n900/
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if [ -e /run/charger-runned ] ; then
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echo "Script already started. Delete run/charger-runned if you are sure no other instance is running"
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exit
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fi
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touch /run/charger-runned
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echo "Charger: " $(cat /sys/devices/platform/musb_hdrc/charger)
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I2CGET=/usr/bin/i2cget
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I2CSET=/usr/bin/i2cset
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if pgrep bme_RX-51; then
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echo "BME is running. Exiting."
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exit
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fi
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configure()
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{
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echo -n "Pre-Config Status: " $($I2CGET -y 2 0x6b 0x00)
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echo -n ", " $($I2CSET -y 2 0x6b 0x00) "."
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# Disable charger for configuration:
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# $I2CSET -y 2 0x6b 0x01 0xcc # No limit, 3.4V weak threshold, enable term, charger disable
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# Register 0x04
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# 8: reset
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# 4: 27.2mV # charge current
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# 2: 13.6mV
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# 1: 6.8mV
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# 8: N/A
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# 4: 13.6mV # termination current
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# 2: 6.8mV
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# 1: 3.4mV
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# 7-1250 6-1150 5-1050 4-950 3-850 2-750 1-650 0-550
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# 7-400 6-350 5-300 4-250 3-200 2-150 1-100 0-50
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$I2CSET -y -m 0xFF 2 0x6b 0x04 0x42;
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# Register 0x02
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# 8: .640 V
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# 4: .320 V
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# 2: .160 V
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# 1: .080
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# 8: .040
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# 4: .020 (+ 3.5)
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# 2: otg pin active at high (default 1)
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# 1: enable otg pin
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$I2CSET -y -m 0xfc 2 0x6b 0x02 0x8c;
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REGV=4200
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# 4.24 = 3.5 + .640 + .08 + .02 = 94
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# 4.22 = 3.5 + ,640 + .08 = 90
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# 4.2 = 3.5 + .640 + .040 + .02 = 8c
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# 4.16 = 3.5 + .640V + .020 = 84
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# 4.1 = 3.5 + .320 + .160 + .08 + .04 = 78
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# 4.0 = 3.5 + .320 + .160 + .02 = 64
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# 3.9 = 3.5 + .320 + .080 = 50
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# Register 0x1
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# 8: 00 = 100, 01 = 500, 10 = 800mA
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# 4: 11 = no limit
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# 2: 200mV weak threshold default 1
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# 1: 100mV weak treshold defsult 1 (3.4 - 3.7)
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# 8: enable termination
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# 4: charger disable
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# 2: high imp mode
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# 1: boost
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$I2CSET -y 2 0x6b 0x01 0x08;
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#hotswap: c0
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#normal: c8
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# Register 0x00
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# 8: Read: OTG Pin Status
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# Write: Timer Reset
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# 4: Enable Stat Pin
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# 2: Stat : 00 Ready 01 In Progress
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# 1: : 10 Done 11 Fault
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# 8: Boost Mode
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# 4: Fault: 000 Normal 001 VBUS OVP 010 Sleep Mode
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# 2: 011 Poor input or Vbus < UVLO
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# 1: 100 Battery OVP 101 Thermal Shutdown
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# 110 Timer Fault 111 NA
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$I2CSET -y 2 0x6b 0x00 0x00;
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# Softstart
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$I2CSET -y 2 0x6b 0x01 0xc8;
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sleep 1
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#echo " Unlimited: " $($I2CGET -y 2 0x6b 0x00)
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#$I2CSET -y 2 0x6b 0x00 0x80 # timer reset
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cat /sys/devices/platform/musb_hdrc/charger >/dev/null
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}
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configure
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# Initialize variables
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FULL=0
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MODE="STANDBY"
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WALLCHARGER=0
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# Assuming a nice round number 20mOhm for bq27200 sense resistor
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RS=21
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# Assuming this much resistance between charger and battery
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CR=131
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BQPATH="/sys/class/power_supply/bq27200-0"
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get_nac ()
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{
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NAC=$(cat $BQPATH/charge_now)
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NAC=$((NAC/1000))
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}
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get_rsoc ()
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{
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RSOC=$(cat $BQPATH/capacity)
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}
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get_volt ()
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{
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VOLT=$(cat $BQPATH/voltage_now)
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VOLT=$((VOLT/1000))
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}
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get_rate ()
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{
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RATE=$(cat $BQPATH/current_now)
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RATE=$((RATE/1000))
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RATE=$((-RATE))
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}
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calculate_system_use ()
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{
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SYSTEM_USE=$(( ($REGV *1000 - $VOLT*1000) / $CR - $RATE ))
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if [ $(($SYSTEM_USE+$RATE)) -gt 950 ] ; then
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SYSTEM_USE=$((950-RATE))
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fi
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}
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decode_status()
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{
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S=$1
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SOTG=$((S/128))
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S=$((S-SOTG*128))
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SSPIN=$((S/64))
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S=$((S-SSPIN*64))
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SSTAT=$((S/16))
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S=$((S-SSTAT*16))
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SBOOST=$((S/8))
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S=$((S-SBOOST*8))
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SFAULT=$((S))
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# if [ $SSTAT -eq 0 ] ; then
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# echo charger status: Ready
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# fi
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# if [ $SSTAT -eq 1 ] ; then
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# echo charger status: InProgress
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# fi
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# if [ $SSTAT -eq 2 ] ; then
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# echo charger status: Done
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# fi
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if [ $SSTAT -eq 3 ] || [ $SFAULT -ne 0 ]; then
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echo -n $(date) charger status: Fault:
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case $SFAULT in
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0 )
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echo NoFault ;;
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1 )
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echo VbusOVP ;;
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2 )
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echo SleepMode ;;
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3 )
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echo Poor Input or VBus UnderVoltage ;;
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4 )
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echo Battery Overvoltage Protection ;;
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5 )
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echo Thermal Shutdown ;;
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6 )
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echo TimerFault ;;
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7 )
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echo Unknown ;;
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esac
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fi
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}
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SLEEPTIME=15
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while true ; do
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STATUS=$($I2CGET -y 2 0x6b 0x00)
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#echo $STATUS
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$I2CSET -y -m 0x80 2 0x6b 0x00 0x80; # timer reset
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get_nac
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get_rsoc
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get_volt
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get_rate
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# Sanity
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if [ $VOLT -gt 4200 ] ; then
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echo "***CRITICAL*** Battery voltage $VOLT exceeds 4.2V!!!"
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exit 2
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fi
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if [ $MODE == "STANDBY" ] ; then
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if [ $STATUS == 0x10 ] || [ $STATUS == 0x90 ] ; then
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MODE="CHARGING" ; SLEEPTIME=5
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echo $(date) "standby -> CHARGING. Current available capacity: " $NAC "mAh, " $RSOC " percent."
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WALLCHARGER=$(cat /sys/devices/platform/musb_hdrc/charger)
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fi
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fi
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if [ $MODE == "CHARGING" ] ; then
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if [ $STATUS == 0x00 ] ; then
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MODE="STANDBY" ; SLEEPTIME=15
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echo $(date) "charging -> STANDBY. Current available capacity: " $NAC "mAh, " $RSOC " percent."
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WALLCHARGER=0
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# This will stop USB from eating power as long as you haven't plugged it into a PC
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# #### echo 0 > /sys/devices/platform/musb_hdrc/connect
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fi
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fi
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if [ $STATUS == 0x20 ] && [ $FULL == 0 ] ; then
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echo "Charge done"
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#echo $(date) "FULL: " $NAC "mAh" >> /home/user/MyDocs/charger.log
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FULL=1
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fi
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if [ $STATUS == 0x00 ] && [ $FULL == 1 ] ; then
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FULL=0
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fi
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calculate_system_use
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decode_status $STATUS
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echo Status: $STATUS Mode: $MODE Full: $FULL Wall: $WALLCHARGER Voltage: $VOLT NAC: $NAC level: $RSOC % Rate: $RATE System: "-"$SYSTEM_USE Ch: $(($SYSTEM_USE+$RATE))
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sleep $SLEEPTIME
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done
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