The aim of this crash course is to provide a basic overview of embedded Linux.
We’ll see topics like those:
- What are the components needed to build an Embedded Linux system?
- Where to get them from and how to configure/build/install them?
- Where to get help from?
- What about licenses?
Hands-on exercises provide you with the necessary practical experience to go ahead and configure/build an Embedded Linux system with mainline components.
This three-day class uses hands-on exercises combined with instruction to illustrate some basic concepts of Embedded Linux. Hands-on sessions are performed on the host with a Yocto Project® SDK and on some target hardware (e.g. i.mx6). The whole workshop is designed to bring you quickly up to speed. The concepts and commands necessary to make effective use of Embedded Linux are described through a combination of theory and hands-on exercises. Don’t re-invent the wheel, but learn from an experienced trainer and take the newly acquired knowledge of Embedded Linux and the ability to effectively integrate it into your own embedded development projects back home.
- Basic familiarity with using a Linux system (e.g. Ubuntu) as an end user in user space
- Basic familiarity with a command-line shell
- Familiarity with embedded C concepts and programming
- Ability to develop software using C syntax
- Basic knowledge of embedded processor development boards
- …and/or no fear to learn more of the above
Who should attend?
Project managers, software-, hardware-, development-, systems-, test- engineers, administrators, technicians, and those interested in technology wanting to understand as quickly as possible how Embedded Linux works. You have to use Linux or need to decide whether it makes sense to use it or not. You may already use Embedded Linux, but you are not quite sure if you do everything right. You currently use another operating system and want to find out whether Linux would maybe be more cost-effective or too complicated.
- History of Unix/Linux | Licensing | Standards | Unix Philosophy
- Linux on the desktop compared to Linux in an embedded system | cross-/native toolchains | pre-built toolchains | build systems | C libraries | …
- How does Linux boot on a PC and on the evaluation board? | Boot sequence | SD card partitions | See it booting
- What is Yocto? | What is the Yocto Project®? (features/challenges) | Some tools under the Yocto Project® umbrella (Poky | BitBake | OE-Core | Metadata) | Why would you use the Yocto Project®?
What’s needed on…
- The Yocto Project® | The Yocto Project® build-environment | installation of the Yocto Project® SDK
- SD card preparation | terminal emulation
screen | byobu | minicom
- DHCP| tftp | NFS
- root file systems
- target system
- checkout | config – kconfig | build – kbuild | kernel modules | install
- Flat device tree (fdt)
- investigate | build | install
- Customizations: System hangs | pseudo tty | getty | runlevel | static ip
- Init: Sys-V | Various | systemd | bootgraph | bootchart
- init/exit | Licensing |
taintedmodule/kernel | EXPORT_SYMBOL |
out of tree.ko makefile
- put module in kernel tree
- parameter passing
- Device Files | Device Types | Device Nodes major/minor | Kernel Driver Interface
- Device Driver: Intro | Registration | Initialization | Open/Release
Miscellaneous Character Drivers
User Space Debugging
- Simple tools | Advanced tools | What’s a debugger?
- gdb: target gdb | gdb
Kernel Debugging (optional)
- kgdb/kdb + agent-proxy | JTAG
- Profiling/Tracing tools: strace |
system timers| gprof | gcov | ftrace/kernelshark | systemtap | perf | LTTng
- top and related applications: top |
latencytop| powertop | powerdebug
crash: gdb on steroids
- ”Embedded Linux – From System Architecture to Real-Time (5 days)”
- ”Refresher to Embedded Linux & Intro to the Yocto Project (5 days)”
- ”Embedded Linux Kernel Internals and Device Drivers (5 days)”
- ”The Yocto Project – A thorough Overview (4 days)”
- ”Introduction to Embedded Linux & Real-Time, bird’s eye view of the Yocto Project (4 days)”
- ”(Embedded) Linux debugging (3 days)”
- ”FreeRTOS in Theory and Practice (3 days)”