Chapter 5: Raspberry Pi3 Basic

System On Chip (SOC)

What is System on Chip?

• A complex IC that integrates the major functional elements into a single chip or chipset.

• programmable processor
• onchip memory
• accelerating function hardware (e.g. GPU)
• both hardware and software
• analog components

Benefits of SoC

• Reduce overall system cost
• Increase performance
• Lower power consumption
• Reduce size
• BCM2835 SoC Multimedia processor

CPU

• ARM 1176JZFS (armv6k) 700MHz
• RISC Architecture and low power draw
• Not compatible with traditional PC software

GPU

• Broadcom Video IV
• Specialized graphical instruction sets

RAM

• 512MB (Model B rev.2)
• 256 MB (Model A, Model B rev.1)

Connecting A Display And Audio

HDMI

• Digital signal
• Video and audio signal
• DVI cannot carry audio signal
• Up to 1920x1200 resolution

Composite RCA

• Analog signal
• 480i, 576i resolution

3.5mm jack

RPi Remote Connections

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Universal Serial Bus

• Two USB 2.0 ports in RPi
• Buy a powered USB hub

Passive models are cheaper and smaller, but lack the ability to run current hungry devices like CD drives and external hard drives.

Storage: Secure Digital (SD)

Form factor

• SD, Mini SD, Micro SD

Types of Card

• SDSC (SD): 1MB to 2GB
• SDHC: 4GB to 32 GB
• SDXD up to 2TB

The card should be at least 2GB in capacity to store all the required files Storage:

Continue SD Formatter:

/

How to mount USB flash drive from command line:

Networking Wireless

IEEE 802.11 WiFi

• Protocols

• 802.11 b, up to 11Mbps
• 802.11 g, up to 54Mbps
• 802.11 n, up to 300Mbps
• 802.11 ac (draft), up to
  • 1Gbps
  • Frequency band
• 2.4GHz, 5GHz

Low Speed Peripherals

• General Purpose

Input/Output (GPIO)

• Pins can be configured to be input/output
• Reading from various environmental sensors

• Ex: IR, video, temperature, 3axis orientation, acceleration
  • Writing output to dc motors, LEDs for status.

Power Consumption

• microUSB power connector
  • 2.5W (model A)
  • 3.5W (model B)
• Powered USB hub
  • To provide more power for USB peripherals

Useful links

• Raspberry Pi official website
  • /
• Raspberry Pi wiki
• Raspberry Pi verified peripherals
• The MagPi
• Raspberry Pi on Adafruit Learning System:

Remapping Keyboard:

• sudo vi /etc/default/keyboard

  XKBLAYOUT=”gb”

  Change “gb” to “us”

• (This assumes you want a us mapping, if not replace the gb with the two letter code for your country)

Install and Start SSH

• Update aptget package index files:
  • sudo aptget update
• Install SSH:
  • sudo aptget install ssh
• Start SSH server:
  • sudo /etc/init.d/ssh start
• To start the SSH server every time the Pi boots up:
  • sudo updaterc.d ssh defaults
• SSH client for Windows:
  • PuTTY
  • /
• SSH Secure File Transfer

Install Java

• 1. JDK 8 (with JavaFX) for ARM Early Access

  /

  • Download from Raspberry pi
  • Download from your own PC and copy it (scp) to

Raspberry pi

• Extract the JDK tar.gz file
  • tar –zxvf fileToExtract.tar.gz
  • You will get a folder “jdk1.8.0”

Set Java PATH

• If you put the folder “jdk1.8.0” in the home directory (i.e. /home/pi), you will see the java executables (e.g. javac, java, appletviewer) in the directory: /home/pi/jdk1.8.0/bin
• open /etc/profile add:

  PATH=$PATH:/home/pi/jdk1.8.0/bin export PATH

• Reboot:

  sudo reboot

Software

• LXTerminal and Root Terminal: use the Linux command line in a window without leaving the GUI.
• Midori & NetSurf: Lightweight web browser
• IDLE and IDLE 3: IDE for Python 2.7 and 3
• Task Manager: Checks the available memory, processor workload, closes crashed or unresponsive programs
• Music player at the console: moc
• : sudo aptget install
• Image Editing: Gimp
• LAMP (Linux, Apache, MySQL and PHP) stack
• Sudo aptget install apache2 php5 php5mysql mysqlserver

Installing, Uninstalling And Updating Software

• Package manager in Debian: apt
• GUI for apt, Synaptic Package Manager doesn’t work well on Pi due to the lack of memory
• Make sure that the apt cache is up to date:
• aptget update
• Finding software:
• aptcache search emacs
• Installing software and dependencies:
• sudo aptget install emacs
• Uninstalling software:
• sudo aptget remove emacs
• sudo aptget purge emacs (removes everything including configurations)
• Upgrading software:
• Sudo aptget upgrade
• Sudo aptget install emacs

Troubleshooting

Keyboard and Mouse Diagnostics

Power Diagnostics

Display Diagnostics

Network Diagnostics

Emergency Kernel

Wired Networking Configuration

sudo nano /etc/ntework/interfaces

iface eth0 inet static

[tab] address 192.168.0.10

[tab] netmask 255.255.255.0

[tab] gateway 192.168.0.254

sudo /etc/init.d/networking restart

sudo nano /etc/reslov.conf

nameserver 8.8.8.8

nameserver 8.8.4.4

sudo /etc/init.d/networking restart

ping –c 1 www.raspberrypi.org

Wireless Networking Configuration

• USB WiFi adapters are very powerhungry. Connect a powered USB hub to the Pi, and then insert the WiFi adapter into that.
• Print out the entire kernel ring buffer and find out the company that makes the actual chip: mesg | grep ^usb
  • Atmelfirmware
  • Firmwareatheros
  • Firmwarebrcm80211
  • Firmewareintelwimax
  • Firmwareipw2x00
  • Firmwareiwlwifi
  • Firmwareralink
  • Firmwarerealteck
  • Zd1211firmware
• Check the current status of the network: iwconfig