HOW TO PREPARE IT

In case of Samsung devices using CM11:

• Requires edit "CM11/android/device/samsung/smdk4412-common/BoardCommonConfig.mk" adding:

  ... #Charging mode BOARD_CHARGING_MODE_BOOTING_LPM := /sys/class/power_supply/battery/batt_lp_charging BOARD_BATTERY_DEVICE_NAME := "battery" BOARD_ALLOW_SUSPEND_IN_CHARGER := true BOARD_SAMSUNG_DEVICE := true BOARD_IMAGES_ON_SYSTEM := true FORCE_REBOOT_WHEN_FULL := true ...

• Requires edit "CM11/android/device/samsung/smdk4412-common/common.mk" adding/replacing:

  ... #Charger PRODUCT_PACKAGES +=
  bettercharger
  bettercharger_res_images ...

  NOTE: By default CM not use "charger" for Samsung devices, it use private binary blobs playlpm

• Requires edit "CM11/android/device/samsung/i9300/BoardConfig.mk" adding/replacing:

  ... #Charging mode BOARD_CHARGER_RES := device/samsung/i9300/bettercharger/images ...

• Create folders "bettercharger/images" on "CM11/android/device/samsung/i9300/"

NOTE: We don't modify lpm.rc because all prior ROMs use private playlpm binary, and we use the same path for this reason.

HOW TO COMPILE IT

By default charger is integrated on recovery for Nexus devices, maybe its required compile it the first time:

THREADS=1
croot
time make recoveryimage showcommands -j${THREADS}

And the rest compilations, you can only compile bettercharger:

THREADS=1
cd ~/CM11/android
source build/envsetup.sh
breakfast i9300
export USE_CCACHE=1
cd system/core/bettercharger/
time mm

The compiled output must be in: ~/CM11android/out/target/product/i9300/root/system/bettercharger Using the same structure that goes to internal memory

But for correct execution we need to replace the original binary "/system/bin/playlpm" with a script like this:

#!/system/bin/sh
mkdir -p /res/images
/system/bettercharger/bettercharger

The "mkdir" line is a "workaround" because ower binary expects to find this folder in recovery, but we don't use this folder.