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Online Training: Embedded Linux Systems Architecture

To provide an understanding of the essentials of embedded GNU/Linux, how the bits and pieces fit together. What components are needed to build an embedded GNU/Linux system, where to get them from and how to configure/build/install them? Where to get help from? What about those software licenses? Hands-on exercises provide you with the necessary practical experience to go ahead and develop your own embedded GNU/Linux systems after completing this training successfully.

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Not from Germany? Please send us a booking request via e-mail at training@eclipseina.com

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Embedded Linux Systems Architecture

This five day training class uses hands-on exercises combined with instruction to illustrate the concepts of embedded GNU/Linux. It is designed to bring you quickly up to speed. The philosophy, concepts and commands necessary to make effective use of GNU/Linux are described through a combination of theory and on-the-job training. Don’t reinvent the wheel, but learn from an experienced trainer and take home a working knowledge of GNU/Linux and the ability to use it effectively in your own embedded development project.

You can also book this seminar as an online-private-seminar! Just write us a short non-binding e-mail with the desired date and location as well as the number of participants: training@eclipseina.com

We also offer a training on the topic of the Yocto Project.

Get an overview of all our seminars on embedded-academy.com!

Target Group

Managers, project managers, software-, hardware-, development-, systems engineers, testers, administrators, technicians and other parties interested in the technology, who want to understand as quickly as possible how Embedded GNU/Linux works. You must use GNU/Linux or you have to luxury to decide whether it makes sense to use it or not. Maybe you already tried to use Embedded GNU/Linux, but are not quite sure that you did everything the right way. You currently use a different operating system and want to figure out whether GNU/Linux might be better and/or cheaper.

Prerequisites

Basic familiarity with using a GNU/Linux system (e.g. Ubuntu) as an end user in user space
Basic familiarity with a command line shell
Basic knowledge of user space/application development with GNU/Linux
Basic knowledge concerning embedded processors and development boards
Basic C programming knowledge
…and/or no fear to learn the above…

Training Content

Introduction

History of Unix/Linux
Licensing
Standards
Working with Free Software
Spelunking
Unix Philosophy

Host playground

architecture
shell
FHS (file hierarchy standard)
- Devices, Daemon, Booting, Program Sections, Static/Shared Libraries
permissions
- Access Control, Changing Permissions, umask
hard/soft links
real/effective uid/gid

Process/IPC

Intro
- What's an OS?
- What's a scheduler?
- Linux: scheduler, priorities, scheduling classes
- process/task/thread
- errno
- fork
- Process termination
- Process states
- Zombies
- More about Processes
IPC simple
- shell redirection, shelling out, tmpfiles
IPC Generic
- Message passing vs. shared memory
Advanced IPC
- pipes
- signals
- interrupted system calls
- message queues
- semaphores
- shared memory
- sockets
- select/poll
IPC techniques to avoid

Embedded Specifics

Intro
Portability
Build
- Cross/Native toolchain
Toolchains
C-Libraries
- glibc, uclibc, eglibc, others
- reduce shared lib size

Eval Board

Booting
- How does LInux boot on a PC?
- How is an Embedded System different?
Booting the target
- Boot sequence, SD card and partitions

Stuff Needed

Host
- Toolkit
  - The Yocto Project
  - Install Yocto SDK
- SD card
- screen
- minicom
- tftp server
- Root file systems
- Nfs server
Target
- U-Boot
  - Das U-Boot
  - Scripting
  - Fancy stuff
    - Spash Screen
    - U-Boot environment from Linux
    - Post mortem
    - Automatic SW update
    - How to contribute?
  - Get/Configure/Build/Install
  - Commands
- Flat device tree
  - What is a flat device tree?
  - Device tree compiler
  - Examples/Documentation
- Linux kernel
  - Get
  - Kbuild
  - Multi Platfrom Support
  - Configure/Build/Install
  - Get/configure/build install
  - What is uImage?
  - Build fdt
  - In-tree kernel modules

Rool File Systems

Available root file systems
prepare minimal-dev rootfs
tftp server
rootfs on ramdisk
mtd
rootfs on jffs2
mtdparts
rootfs on cramfs
rootfs on ro ext2
build/execute what's applicable from above on the target board
rootfs comparison

Customizations

System hangs
pseudo tty
getty
runlevel
static ip
mount nfs
ssh server

User Space Debugging

Debugging Intro
- What's a bug?
- Types of bugs
- Debugging strategy
Simple tools
- lsof, ltrace, strace,...
- procfs, top, netstat, syslog,...
Advanced tools
What’s a debugger?
gdb
- host gdb
- target gdb
- gdb remote debugging
- gdb remote debugging with GUI

User Space Profiling/Tracing

Profiling/Tracing tools
- strace
- system timers
- gprof
- gcov
- code optimization
- oprofile
- perf
top an friends
- top
- latencytop
- powertop
- powerdebug
crash

Real-time

prerequisites
- Kernel vs. User Space
- interrupts
- reentrant code
Real-time Intro
- What is Real-time
- Determinism
Real-time Linux
- Hypervison
- Dual kernel
- Fully preemtive kernel
- 0 Vanilla Linux kernel
- 1 explicit preemption points
- 2 implicit preemption points
- 3 real-time preemption patch
- fully preemptive kernel
- hard real-time extensions
Adeos/Xenomai
- adeos patch
- xenomai
- patch/config/build kernel
- run it on board
Real-time myths
- must be fast
- rate monotonic
- universal methodology
- scheduling theory
- RTOS vs. Linux
- New hardware
- Dual kernel vs. Preempt-rt
- Future outlook Dual kernel
- Future outlook Preempt-rt

Technical requirements to attend a remote/online training

(ship-it/web/host/target/phone) e-mail address to get login credentials
(web) screen sharing/audio/video/whiteboard/chat/Q&A: https://www.bigmarker.com requires this: https://rlbl.me/bm-req.
backup: (web)/audio (phone) conference call: https://www.turbobridge.com/international.html
(host/target) shell: port 22 not blocked: something like: ssh @vlabx.dyndns.org
backup: (host/target) shell via browser: port 443 not blocked: something like: https://vlabx.dyndns.org

Organiser:

Eclipseina GmbH | Embedded Academy

Technologiezentrum TechBase
Franz-Mayer-Straße 1
93053 Regensburg

Tel.: +49 941 / 462 974 20
Fax: +49 941 / 462 974 30

Not from Germany? Please send us a booking request to training@eclipseina.com

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