MDAD 1 - Introduction

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Introduction
Hardware

Who we are?
• Course
– Alexandru Radovici
• Lab
– Ioana Culic
– Alexandru Radovici
2

Outline
• Kotlin
• Android Framework
– Activities
– Services
– Network Services
• React Native
3

Rules
• Exam
– 50% exam
– 50% project
• Lab presence
– minimum 5 to enter the exam
– use a camera
4

Mobile device
• Portable device
– Small size
– Simple tasks
• Replacement for
– Agenda
– Notes
– Remote control
• Entertai...

Do you know them?
6

Mobile devices
iPhone & iPad
• iOS
• Objective-C
• Swift
Android
• Linux
• Java
• Kotlin
• C/C++
7

These used to be Mobile devices
Windows Phone
• C#
• C/C++
Ubuntu
• C/C++
• HTML 5
• Qt
SmartPhone
• Symbian
• C++
• Java ...

These used to be Mobile devices
Pocket PC
• Windows Mobile
• C++, C#
Blackberry
• BlackberryOS
• Blackberry 10
• C/C++
• H...

Main Components
• Microprocessor
– RISC
– ARM (Advanced RISC Machine)
• RAM Memory
– SDRAM, DDRAM (DDR4 sometimes)
• ROM (...

Secondary Components
• Storage device
– SSD (Solid State Drive)
– Memory card (SD, Flash etc.)
– Hard Disk
• Classic iPod
...

Development platforms
Raspberry Pi
$35
BeagleBone Black
$45
12

ZeroPhone
13
https://www.crowdsupply.com/arsenijs/zerophone
$50

Microprocessor
• RISC
– Reduced Instruction Set
Computing
– ARM (Advanced RISC Machine)
– Simple instructions
• Might not ...

Microprocessor parameters
• Clock speed (MHz)
– Not the only relevant
• Cache Memory
– Processing performance
• Power cons...

RAM Memory
• SDRAM / DDRAM
– Even DDR4
• Limited
– 512 MB – 8 GB
16

ROM (OS partition)
• Pocket PC
• Read only space
– Initial OS image
– Persistent after hard reset
• May be written
– Updat...

Screen
• Important
• Usage
– Display
– User interaction
• Limited size
• Several resolutions
– Independent from the
screen...

Screen Resolutions
19

Touch Screen
Resistive Capacitive
20

Resistive Display
• Two layers
• Requires pressing
• Advantages
– Exact touch
• Stylus
– Low power
• Disadvantages
– Stron...

Capacitive Display
• An insulator layer
– Glass / plastic
• Does not require a touch
• Advantages
– Thin touch
– Resistant...

Keyboard
• Phone
– Numbers only
– 3 letters/ key
• QWERTY
– Complete keyboard
– With numbers
• A few functional buttons
– ...

QWERTY
24

QWERTY and virtual keyboard
25

Phone keyboard and QWERTY
26

A few functional buttons
27

No buttons
28

Radio
• Phone
– GSM / CDMA / UMTS
– GPRS / EDGE / 3G / 4G
– Up to la 25 Km
• WiFi
– Wireless
– 2.4 GHz
• Bluetooth
– Small...

WiFi
• Implemented in OSI
– Standard
– TCP / IP most used
protocol
• Up to 300 m
• Speeds
– 11 Mbs (802.11b)
– 54 Mbs (802...

Bluetooth
• Viking king Harald
Bluetooth
– United Norway and
Denmark
– Very communicative
• Uses non-standard
protocols
– ...

Bluetooth 4
• Smart
• LE
• Sensors
• Standard
• Different stack from
3.0
32

Storage devices
• Solid State Drive (SSD)
– Fast
– Inefficient when deleting
• A page at a time
– Limited number of writes...

SSD vs. Hard Disk
34

Storage space
• Unlimited
– Tens of GB
– Kind of cheap
• High speed
– SSD especially
35

Sensors
• GPS / GLONASS
– Assisted GPS (AGPS)
• Accelerometer
• Photo camera
• All use the battery
– Use with carefully
36

Conclusions
• Mobile devices
– Similar in computing power with computers
• Processors
– RISC
– Arm
• Display
– Small sizes...

Keywords
• Mobile device
• Smart Phone
• Pocket PC / PDA
• Blackberry
• Windows Mobile
• Windows Phone
• Android
• iOS
• J...

Questions
39

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