1. EE516: Embedded Software Project 1
EE516: Embedded Software Project 1. “Setting Up Environment for Projects”
Dong Jae Shin, PhD student

2. Contents Introduction to Projects of EE516 Tasks
Setting Up Environment
Virtual Machine Environment
Ubuntu Linux OS Installation
Environment for Development
1. Shell Script
2. Simple C Programming
3. Makefile
Report
Problems
Source code submission & Screenshot
General Grading Policy

3. Introduction to Projects
Project 1: Setting up Environment for Project
“Development” Project
Project 2: Linux Fundamental
Project 3: System Call and Synchronization
Project 4: File System
Project 5: Device Driver for Embedded H/W
Especially, including “BeagleBoard Development”

4. Environment Overview Through this course,,,
We will use Ubuntu LINUX as the base OS for the projects.
Do we need new machine for Ubuntu LINUX?
We usually use Windows OS for our own machine
The answer is NO!
We have “Virtual Machine Environment”!
Such as VMware Player

5. Environment Overview What is “Virtual Machine Environment”?
Software Stack of “Virtual Machine Environment”
Ubuntu
(Guest OS)
Others …
VMware Player
(Virtualization Layer from VMware)
Host OS (e.g. Windows)
(Your host OS installed on the machine)
Physical Resources of Your own machine
(CPU, MEM, STORAGE, NETWORK ..)

6. Install Virtual Machine Monitor
“Virtual Machine Environment”
Download VMware Player ( or (
Depends on your OS
Windows-64bit
Linux-64bit
You need 64-bit Operating System.
If you don’t have, please contact TA.

7. Install Virtual Machine Monitor
Install VMM
Install the product following the instructions of the installer
Installation Path
Enter your
Run VMware Player

8. Install Guest OS We’ll use Linux OS for Guest Linux
made by Linus Torvalds in 1991
Free software for replacing Unix
Many usages - servers, desktops, mobile devices(Android)
Linux Distributions
Operating Systems based on Linux Kernel
Linux Kernel : Core of Linux
Scheduling, File System, Device Drivers
System Software : Compilers, Libraries, User Interface
User Program : Office, DB, Web Server, Web Browser, Mail …

9. Install Guest OS Download Ubuntu Linux
ubuntu desktop-amd64.iso or

10. Install Guest OS Create your own Virtual Machine
Select New Virtual Machine
Downloaded File Path
Login Password

11. Install Guest OS Virtual Machine Properties Disk Size : 20GB is enough
Need free space in HDD
Main Memory Size for VM
more than 1GB
Number of processor for VM

12. Install Guest OS Initialize Ubuntu Desktop it takes several minutes.
log-in with your password
open terminal (ctrl + alt + T)

13. Install Guest OS Get root account & password
root account : the highest level account for administrator
It is needed when
change system configuration
install programs
execute system-level program
cannot reboot
create root password
you are the root now

14. Shell Script Shell Types of Shell A command line interpreter
Accepts input from the user
Executes the command that is given
Types of Shell
Command Line Interface (CLI) shell
Based on text
Graphic User Interface (GUI) shell
Based on graphic
e.g. x-window system in linux
CLI
GUI

15. bash shell : Ubuntu default
Shell Script
Various CLI Shells
Bourne Shell (1977) == sh
Developed by Steve AT&T Bell lab.
First shell of UNIX system
Bourne-again shell (1989) == bash
Developed by Brain Fox
Basis of shells on UNIX/LINUX type system
Recent systems also use bash
bourne shell (sh)
bash shell : Ubuntu default

16. Shell Script CSH (C shell) TCSH (Tenex C shell) Developed by Bill Joy
C-language-like shell interpretation
TCSH (Tenex C shell)
Tenex: OS from Carnegie Mellon Univ.
Enhanced version of CSH for Tenex system

17. Shell Script Command execution on Shell
ls : List information about file(s)
cat : Display the contents of a file
echo : Print string
mkdir : Create new folder(s)
rmdir : Remove folder(s)
pwd : Display current directory
cd : Change current directory
cp : Copy one or more files to another location
mv : Move or rename files or directories
rm : Remove files

18. Writing a Shell Script Text Editor gedit : GUI based text editor
vi, vim : CLI based text editor
apt-get install vim
you can use any text editor
install vim
ubuntu:~$ gedit
ubuntu:~$ vim test.sh

19. Writing a Shell Script Writing a Simple Script Shell Script Guide
$ vim test.sh
or $ gedit test.sh
save file
$ chmod 755 test.sh
$ ./test.sh
$ ./test.sh something
Shell Script Guide
simple source code
execution

20. tree -d

21. Writing a C Program Writing a C Program C Program Guide $ vim hello
or $ gedit hello.c
save file
$ gcc hello.c -o hello
$ ./hello
C Program Guide
simple source code
compile & execution

22. Make Utility
Utility for automatically building executable programs and libraries from source code
Help build programs from numbers of source code files
Manage dependency among source code files and compiling method
Prevent mistake
$ gcc –o hello hello.c
 Correct
$ gcc –o hello.c hello.c
 source code will be gone!

23. This empty space should be “tab” not “space”
Make Syntax
Syntax
<Target>: <dependency>
<Compile command>
$ make program
Will compile “program”
After all compilation of others because of dependency
This empty space should be “tab” not “space”

24. Makefile Example

25. Macro of Makefile Similar as “#define” of C programming
Useful for repeated expression
Below will do same compilation as previous slide
$ make all : compile every BINs
$ make clean : delete every BINs

26. Task1. Tree Script
Write a bash shell script that shows tree structure of the directories and files included in you own home directory.
Example of Task1

27. Task2. Simple C Program Benchmark We can make File System Benchmark!
Computer program in order to assess the relative performance of an object, normally by running a number of standard tests and trials against it
We can make File System Benchmark!
with Sequential Access and Random Access
Sequential Access
Random Access
Access
Order 1 2 3 4 5 6 7 2 5 3 1 4 7 6
Logical Block 1 2 3 4 5 6 7 1 2 3 4 5 6 7
Example of Task1

28. Task2. Simple C Program Sample code is here
File create  Sequential Write  Sequential Read  Random Write  Random Read  File Delete  End
You should Implement 3 functions
You can refer “file_write_sequential()” function
void file_read_sequential() : about 20 lines
void file_write_random() : about 25 lines
void file_read_random() : about 25 lines
Example of Task1

29. Implement 3 operations : Sequential Read, Random Write, Random Read
Task2. Simple C Program
Compile & Execute Sample Code
Implement 3 operations : Sequential Read, Random Write, Random Read

30. Task2. Simple C Program
Example of Task2

31. Task3. Makefile Write a Makefile for the source code of Task2
Test cases
make all
make clean
Example Result of Task3

32. Submission Contents Submission Source Code Report
Answer to the questions
Key point of your Source Code
Screenshots (Task 1, 2, 3)
Page Limit : about 5 page (except figures)
Submission
Due Date : Sept. 19 ,PM 23:59
[EE516] student_number.zip
(various compression format is allowed)

33. General Grading Policy
Ratio of Grading
Tasks : 70%
Code operation(exception handling), Code readability
No errors and warnings
Report : 30%
Free-form
Problems, Key point of your Source Code, Screenshots of Results
Page Limit : about 5 page (except figures)
Delay Penalty
10%/day (AM 00:00)
Source Code Copying will deduct all of your points
should mention if you referenced it

34. How to Transfer your files
Compression and Extraction
tar.gz
$ tar -czvf compressed_file_name.tar.gz dir_name
$ tar -xzvf compressed_file_name.tar.gz
zip
$ zip compressed_file_name.zip dir_name
$ unzip compressed_file_name.zip
File Transfer between Host Window and VM
Just Copy and Paste
Ctrl + C
Ctrl + V