skku embedded software lab. 15 1 battery information 최완수 (2014711789) 김영훈 (2014711277)...

SKKU Embedded Software Lab.

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https://github.com/batteryinfo

Battery Information

최완수 (2014711789)김영훈 (2014711277)곽현호 (2014711645)


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• The need for batteries usage information in mobile environments – User

• Can check their use patterns• Can remove the application, there is a problem

– Developer• Can check possible errors related to power management• Can optimize app in power management

• Other mobile OS already supports the feature– Now need to provide that features in the Tizen

Provide Battery Usage Information


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• Two types of data– Battery remaining capacity/hardware device usage

information– Battery usage percentage for each app

Battery Information


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• Overall structure

Implementation

Data collection and processing

Service Daemon

Battery usage percentage for each apphardware device usage

Stat File

Existing Framework

Data Write

Display UI based on data

UI App

Communication


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• Obtain App list

Obtain Application Information [1/5]

Ecore Main Loop

소켓 통신 등록

Service Daemon

Appcore Framework

②Socket

Communica

tions

App [pid / name / state]

③Socket Communications

④App list configuration

①Socket Register


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• Inter-process communication same with a common socket socket programming – Use Ecore main loop & Socket register– Use ecore main loop in order not to create additional

loop thread

– Register socket for main loop


Init for custom service Ecore main loop example

Fd for socket communication call-back for socket communication


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• 5 Application State– When the state changes is needed, use app-core f/w – Edit App-core/src/appcore-efl.c

• Transfer the information to the service whenever changes occur to State


Change UI app state depending on event

Transfer Pid, name, state information


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• Organize usage information for the App in the List– Foreground state time in the app is the same as LCD on

time– Read CPU time for each App from proc filesystem


Service Daemon

Each hardware device usage updates for the App list

CPU usage time for each process

/proc/pid/stat read

Stat File

Calculate battery ratio for the App


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• Ratio calculation for each app

– Reflecting a 50% share for LCD & CPU usage time

• Can be extended to a more accurate result– Can reflect the power consumption of the real device– Can be added other hardware

Obtain Application Information[5/5]

Pid Name Percentage


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• Use Vconf– One of IPC

– Whenever the value in the vconf is changed, the corresponding f / w or app is operating

• Register call back

– Register notify for specific value of vconf

Hardware Information [1/2]

Brightness, battery, wifi state, other information exists

vconf_notify_key_changed(VCONFKEY_PM_STATE, _notify_pm_state_cb, NULL)


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• Used vconf value– VCONFKEY_PM_STATE

• LCD, power On/Off state

– VCONFKEY_WIFI_STATE• WiFi On/Off state

– VCONFKEY_SYSMAN_BATTERY_CAPACITY • Current battery capacity

Hardware Information[2/2]

Service Daemon

vconf_notify

RegisterNotify

Notify

Stat File

Time Value


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• Tizen::Graphics::Canvas– Using the Canvas to display a state change in the visual– Show battery usage graph and device on/off state– Use DrawLine for graph– Use FillRectangle for device on/off display

• Tizen::Ui::Controls::GroupedListView– Read the file and Show list by using GroupedListView– Add to the list as the number of app written in Applist– Display name and proportion of each App (%)

UI Implementation [1/2]


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Battery capacityLCD On/OffWiFi On/Off

App listApp proportion (Based on CPU/LCD usage)


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Demo Movie

Demo


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• https://github.com/batteryinfo

Git Hub

Service daemon code

Edited app-core code for transfer app state

UI Application

Example code for Ecore main loop and vconfnotify

skku embedded software lab. 15 1 battery information 최완수 (2014711789) 김영훈 (2014711277)...

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