introduction to the beaglebone black.pdf

Introduction to the BeagleBone Black

Introduction:

The BeagleBone Black is the newest member of the BeagleBoard family. It is a lowercost,

high-expansion focused BeagleBoard using a low cost Sitara XAM3359AZCZ100 Cortex A8

ARM processor from Texas Instruments. It is similar to the BeagleBone, but with some

features removed and some features added.

The table below gives the high points on the differences between the BeagleBone and

BeagleB

one

Black.

Beagle boards are tiny computers with all the capability of todays desktop machines,

without the bulk, expense, or noise. The BeagleBone Black is a low-power open-source

Programming Laboratory III (2014-15)

DPCOE,Department of Computer Engg, Pune

hardware single-board computer produced by Texas Instruments in association with DigiKey

and Newark element14. The BeagleBone was also designed with open source software

development in mind, and as a way of demonstrating the Texas Instrument's OMAP3530

system-on-a-chip. The board was developed by a small team of engineers as an educational

board that could be used in colleges around the world to teach open source hardware and

software capabilities.

BeagleBone Black Features:

Sitara AM335x ARM cortex A8 processor: The board is based on the Sitara

AM335x ARM Cortex-A8 processor from Texas Instruments Incorporated (TI), It

provides 1-GHz performance 150 percent higher performance than ARM11 for more

advanced user interfaces and computation power.

DC power: +5V DC power can be supplied to the BeagleBone through a barrel

connector or from the mini-USB, both of which are located near the large RJ45

Ethernet connector.

2 GB on-board storage using eMMC: In addition to all the features of the previous

board (BeagleBone), the Beaglebone black now uses embedded nonvolatile memory

system using eMMC, which frees the MicroSD slot to be used for additional storage.

512MB DDR3: The board is having 512 megabytes of low-power DDR3L RAM,

doubling the size and speed of the volatile memory and ensuring it will execute

software faster.



PMIC: The board uses a TI TPS65217B PMIC to generate stable supply voltages

regardless of input power variation.

Boot button: Boot button is used to boot the Beaglebone black directly from an

external microSD card. You can boot the Beaglebone Black from an external SD card

by holding down the BOOT button when applying the power

Micro HDMI: with this microHDMI we can connect directly to monitors and TVs.

USB host: USB 2.0 type A host port.

10/100 Ethernet: 10/100 Ethernet RJ45 socket, IPv4 and IPv6 networking.

MicroSD slot: MicroSD slot for additional user data or operating systems.

Expansion headers: The expansion interface on the board is comprised of two 46 pin

connectors. All signals on the expansion headers are 3.3v unless otherwise indicated.

BeagleBone Black Key Component Locations:

Here are the locations of the key components on the Rev A5A.



BeagleBone Black Connector and Switch Locations:

Below is the location of the connectors and switches on the Rev A5A board. The Power

Button and Battery Connections are new additions to the Rev A5A.

2. Getting Started with the BeagleBone Black

Read the step-by-step getting started part below to begin developing with your BeagleBone

Black in minutes.

Getting started:

Step 1: Plug in your BeagleBone black via USB.

Use the provided USB cable to plug your Beagle into your computer. This will both power

the board and provide a development interface. BeagleBone Black will boot Linux from the

on-board 2GB eMMC. Either BeagleBone Black or original BeagleBone may also boot from

a microSD card.



BeagleBone Black will operate as a flash drive providing you with a local copy of the

documentation and drivers. Note that this interface may not be used to re-configure the

microSD card with a new image, but may be used to update the boot parameters using the

uEnv.txt file.

You'll see the PWR LED lit steadily. Within 10 seconds, you should see the other LEDs

blinking in their default configurations.

USR0 is configured at boot to blink in a heartbeat pattern.

USR1 is configured at boot to light during microSD card accesses.

USR2 is configured at boot to light during CPU activity.

USR3 is configured at boot to light during eMMC accesses.

Step 2: Install drivers.

Install the drivers for your operating system to give you network-over-USB access to your

Beagle. Additional drivers give you serial access to your board.



Operatin

g system

Usb drivers Comments

Window

s (64-

bit)

64-bit

installer

If in doubt, try the 64-bit installer first.

Note #1: Windows Driver Certification warning may pop up two

or three times.

Click "Ignore", "Install" or "Run".



Window

s (32-

bit)

32-bit

installer

Note #2: On systems without the latest service release, you

may get an error (0xc000007b). In that case, please install the

following and retry:

http://www.microsoft.com/enus/download/confirmation.aspx?i

d=13523

Note #3: You may need to reboot Windows.

MAC

OS X

Network

serial

Install both sets of drivers

Linux Mkudevrule.

sh

Driver installation isn't required, but you might find a few udev rules

helpful.

Note: Additional FTDI USB to serial/JTAG information and drivers are available from

http://www.ftdichip.com/Drivers/VCP.htm.

Note: Additional USB to virtual Ethernet information and drivers are available from

http://www.linux-usb.org/gadget/ / http://joshuawise.com/horndis

Step 3: Browse to your beagle.

Using either Chrome or Firefox (Internet Explorer will NOT work), browse to the web

server running on your board. It will load a presentation showing you the capabilities of the

board. Use the arrow keys on your keyboard to navigate the presentation.



*Older software images require you to EJECT the BEAGLE_BONE drive to start the

network. With the latest software image, that step is no longer required.

Expanding the Storage Partition on microSD

If you have installed a Linux distribution on your microSD you can modify the root file

system partition. You are then able to utilize all of the space on your microSD card

regardless of the size of the default partition of your given image. Follow the instructions

found on Expanding File System Partition on a MicroSD.



Note: The instructions on that page are general and are not guaranteed to work on every

Linux distribution.

BoneScript

Bonescript is a Node.js library specifically optimized for the Beagle family, featuring familiar

Arduino function calls, exported to the browser. The BoneScript library provides several

functions useful for interacting with your hardware.

Copy commands:

Copying a computer program to the BeagleBone black

If you want to copy a program you have written on your computer to the BeagleBone. You

can do it using the scp command. The scp command can be used in the following ways.

To copy from computer to BeagleBone.

Syntax:

scp source_file_location>

Example:

scp myprogram.py [email protected]:/root/

To copy from BeagleBone to Computer

Syntax:

scp

Example: scp [email protected]:/root/myProgram.py /home/XYZ/Documents



3 Getting SSH Access

SSH is used to take control of the BeagleBone Black to get a root shell access to the bone.

SSH:

SSH (SSH client) is a program for logging into a remote machine and for executing

commands on a remote machine. SSH connects and logs into the specified host name (with

optional user name). The user must prove his/her identity to the remote machine using one

of several methods depending on the protocol version used. If command is specified, it is

executed on the remote host instead of a login shell.

Procedure:

1. Connect the BeagleBone to your computer with the USB cable provided.

2. Wait for the notification of active wire connection.

3. Press (Ctrl+Alt+T) to open a terminal, type the following terminal: ssh

[email protected]

4. If prompted, type yes and press Enter.

As you can see in the image below, when we were typing the ssh command the shell we were

getting was of the computer. But after getting access to BeagleBone Black, we are getting

the shell of the root user on the BeagleBone. Whatever the commands we type here now will

run on the BeagleBone Black.



List of common Linux commands:

pwd - show current directory

cd - change current directory

ls - list directory contents

chmod - change file

permissions

chown - change file ownership



cp - copy files

mv - move files

rm - remove files

mkdir - make directory

rmdir - remove directory

cat - dump file contents

less - progressively dump file

vi - edit file (complex)

nano - edit file (simple)

head - trim dump to top

echo - print/dump value

env - dump environment variables

export - set environment variable

history - dump command history

grep - search dump for strings

man - get help on command

apropos - show list of man pages

find - search for files

tar - create/extract file archives

gzip - compress a file

gunzip - decompress a file

du - show disk usage

Programming Laboratory III (2014-

15)


4 Running your First Program on the BeagleBone Black

BeagleBone is a complete single board computer (SBC). Hence it can be used to

program with any language of your choice. For writing our first program on the

BBB we'll use python and C.

To get started we'll need a shell access to the BeagleBone,

Writing your first program using Python:

To write the program on terminal we will use a simple text editor for terminal

called as 'Nano'. To write a HelloWorld program using nano on terminal type the

following on terminal. nano HelloWorld.py

The above command will start the Nano text editor and create the file

HelloWorld.py file. You can type your code for python in the editor. A simple hello

world in Python will be

print HelloWorld

To save the code press Ctrl + X and press Y and then Enter. All the keyboard

shortcuts for nano are listed at the bottom of the nano interface.

The program's output can be seen in the following way.

root@beaglebone:~# python HelloWorld.py


15)


OUTPUT: Hello World

Writing your first program using C:

To program in C the similar procedure as done for python can be

used. Open the Nano text editor and create the HelloWorld.c file

root@beaglebone:~# nano HelloWorld.c

Type your code for the program in the window of the Nano text editor. Simple hello

world program for C would be

#include

int main(void)

{

puts(\n\t Hello World);

return 0;

}

Save the program using Ctrl + X and press Y and enter.

To compile the code type root@beaglebone:~# gcc

HelloWorld.c

To view the output of code type

root@beaglebone:~# ./a.out


15)


OUTPUT: Hello World

introduction to the beaglebone black.pdf

Documents

beaglebone black features

beaglebone black introduction

previous board beaglebone

power button

educational board

dc power

computation power

boot button