The Limestone board is equipped with a BQ27x10 battery gas gauge. The Driver supports the registry settings listed below. The values listed are the default values which are used if a registry value is not found.
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\BatteryExt] "lowLevel" = dword:19 ; % of capacity (for WinCE status only) "criticalLevel"= dword:5 ; % of capacity (for WinCE status only)
The following registry settings can be used to disable the power status icon and the low-battery warning dialogs:
[HKEY_LOCAL_MACHINE\Software\Microsoft\Power] "ShowIcon" = dword:0 "ShowWarnings"= dword:0
If the value of ShowWarnings is set to zero then no power warnings are displayed.
The default values are fine for the Kokam battery used for Limestone.
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\BatteryExt\BQ27x10] "initialBattCapacity"=dword:CE4 ; mAh (used for ILMD calculation) "edvf"=dword:CB2 ; mV (used for EDVF calculation) "edv1"=dword:D48 ; mV (used for EDV1 calculation) "initialStandbyCurrent"=dword:3E8 ; uA (used for ISLC calculation) "lowCapVoltTempComp"=dword:0 ; % (used for EDVT calculation) "digitalMagnitudeFilter"=dword:0 ; uV (used for DMF calculation) "selfDischargeRate"=dword:1 ; ppm self discharge per day @ 25°C (used for SD calculation) "capacityAgingEn"=dword:1 ; battery aging considering: 0: disabled, 1: enabled (used for TAPER[7]) "chargeTaperCurrent"=dword:1 ; mA (used for TAPER calculation) "chargeTerminationVoltage"=dword:3 ; 3968mV + chargeTerminationVoltage * 48mV [0 to 3] (QV1&QV0) "boardOffsetVoltage"=dword:0 ; (+-)boardOffsetVoltage * 2.45uV [-4 to + 3] (BOFF) "fixedDischargeComp"=dword:1 ; fixed dircharge compensation: 0:disabled 1:enabled (DCFIX) "fixedTempComp"=dword:1 ; fixed temperature compensation: 0:disabled 1:enabled (TCFIX) "gainAgeFactor"=dword:0 ; gain age factor (GAF) "lowCapVoltDischargeComp"=dword:0 ; EDV1 discharge rate compensation gain (DEDV) "dischargeRateCompCoeff"=dword:0 ; discharge rate compensation coefficients (DCOMP) "temperatureCompCoeff"=dword:0 ; temperature compensation coefficients (TCOMP) "cycleCountTotal"=dword:0 ; total charging cycle count (CYCT) "lastMeassuredDischarge"=dword:0 ; mAh last meassured discharge (LMD) (when 0: LMD is set to initialBattCapacity)
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\BatteryExt\BQ27x10] "rsValue"=dword:14 ; mOhm RS value (fuel gauge shunt resistor) "pgGPIO"=dword:FFFFFFFF ; PowerGood (AC power detect) gpio number (-1: FuelGauge GPIO) "pgGPIOPol"=dword:0 ; PowerGood gpio polarity "chargingGPIO"=dword:FFFFFFFF ; Charging status gpio number (-1: FuelGauge Charging status) "chargingGPIOPol"=dword:0 ; Charging status gpio Polarity "battChemistry"=dword:0 ; Battery chemistry (0:Unknown, 1:LIION, 2:LIPO)
