This document contains notes from a lecture on Android internals. It discusses the Creative Commons license under which the content is shared, allows for distribution and modification with attribution. It then covers basic concepts of mobile platforms like power management, hardware, and touch interfaces. Specific topics discussed include system on chips, peripheral devices, and the device development cycle.

1. Android internals
Egor Elizarov
SPbSU 2012

2. Legal info
 Android internals by Egor Elizarov is licensed under a
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 All pictures and trademarks are the property of their respective owners. Use of
these trademarks and pictures is subject to owners permissions.
 Corrections, suggestions, contributions and translations are welcome!
2 Egor Elizarov SPbSU 2012

3. Lecture 1
Basic concepts of mobile platforms
yegor.yelizarov(at)gmail.com
Rev: 1.1 http://vk.com/android_internals
Last update: 05/30/2012
3 Egor Elizarov SPbSU 2012

4. Why do we need OS

To control resources

To manage hardware

To simulate simultaneous processes execution
on a single core

To provide inter-process communications

To provide user interface
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5. Mobile OS features

Power management

Specific HW

Special permission model

Touch friendly UI
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6. Mobile OS history
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7. Peripherial devices

Connectivity (WiFi, Bluetooth, 3G)

Input devices (touchscreen, IR remote control,
mouse, keyboard)

Sensors (gyroscope, accelerometer,
magnetometer, light, compass, GPS)

Video system (LCD, DVI, HW acc.)
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8. System on Chip

System On Chip - is an integrated circuit that
integrates all components of a computer or other
electronic system into a single chip.

Popular CPU architectures: x86, PowerPC,
ARM, MIPS

ARM SoC Vendors: Texas Instruments, NVidia,
Freescale, Samsung, Qualcomm, etc.
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9. Some terms

Single board computer (Freescale i.MX53 quick
start board, TI BeagleBoard)

Evaluation board (TI OMAP3EVM, NVidia
Tegra)

Board Specific Package
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10. Device development cycle
Evaluation board
With BSP
Hardware
design
Custom board
Platform
bring up
Custom board
With OS
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11. Next Time

Android history

High level architecture

Android version
control system

Directory code layout Source: http://developer.android.com
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12. Useful links

http://vk.com/android_internals

http://developer.anroid.com

http://android.com

http://arowboat.org

K. Yaghmour. Embedded Android. Early
Release, O'Reilly, October 2011
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13. Thanks to

Sergey Matyukevich for review and advices
(www.linkedin.com/pub/sergey-
matyukevich/31/889/769)

Nikolay F. Fominykh for review and advices
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