COMPUTER TECH. SKILLS

Real Time and Embedded Linux Development

Nº 3309
DATE: CALL
PRICE NIS: 3480 + VAT
DURATION: 4 Days

3309 Real Time and Embedded Linux Development.pdf

Course Overview:

The GNU / Linux operating system is the operating system of choice for many embedded and real time developers: the main reasons being that the source code is free, there are no runtime royalties and it is a robust reliable operating system with excellent networking support.
This course focuses on real time and embedded Linux and Kernel programming, including device drivers.

Who should attend?

Embedded and RT programmers developing devices using the Linux kernel and driver developers for internal or external peripherals.

Prerequisities:

Linux Basics, Linux Introduction or equivalent. Linux Systems Programming or equivalent. Knowledge of C or C++

Course Outline:

1. Introduction

Linux overview
Linux and embedded
Linux general architecture
Linux requirements

2. Linux Kernel Key Features

Supervisor mode v User mode
Processes & threads model, NPTL
Task Scheduler
Scheduling priorities, Real Time
Kernel Preemption
Virtual Memory basics
System Calls
/proc file-system

3. User-mode Programming

Shell basics
Shell scripts
Working with processes: fork, exec, etc.
Working with threads (pthreads)
Exercises

4. Linux and Real Time

RTOS v Linux Memory Model
Linux Hardware Interaction
Latency (Kernel, Interrupt, Scheduler)
Kernel preemption
Linux hard real -time extensions

5. Configuring and Building the Linux Kernel

Getting the sources
Structure of source files
Configuring and building the kernel
Compiling the kernel
Kernel modules

6. Cross-Compiling for Embedded

Embedded Tool-chains
Cross-compiling for the Target Platform
Lab: Compiling & running the kernel (in emulator)

7. Linux Boot Sequence

Embedded Linux boot process
Kernel boot parameters
Bootloaders, U-Boot
Lab: Configuring and compiling U-Boot
root-fs: initrd & initramfs
Busybox
Lab: Building a minimal Linux system (in emulator)
root-fs over NFS

8. Programming in the Kernel Environment

Module Programming basics
Building Kernel modules
Lab: “Hello world” module
Module utilities
Kernel log, printk

Module parameters

Lab: “Hello world” module with parameters
Kernel symbols

9. Kernel Space Considerations

Endianess
Floating point
Execution contexts

10. Working with User Space memory

copy_to_user / copy_from_user
Implementing a /proc reader/writer
Lab: Module with /proc interface

11. Kernel Memory Management

Physical and Virtual memory, on-demand paging
kmalloc / kfree / vmalloc / vfree
Allocators (SLAB/SLUB/SLOB)
Allocating by pages

12. Resource Management

I/O Ports
I/O Memory

13. Interrupt Handling

Interrupt Control
IRQ Flags
Top and Bottom Halves
SoftIRQs, Work Queues and Tasklets

14. Synchronicity

Sleeping, wait queues
Locking (semaphores, mutex, spinlocks)
Atomic operations

15.Timing

Jiffies
Timers
High-Resolution Timers

16. Device Drivers

Types of drivers
Device files, major and minor numbers
Character Device Drivers
Registering a character device
Creating device files
Device numbers allocation
File operations
Lab: Implementing a character device

17. Networking

Linux Networking model
The network stack
sk_buff structure and operations
net_device structure
Network device registration / unregistration
Device initialization
Packet transmit path
Packet receive path

18. Debugging

Kernel Debugging techniques
Handling Oops and Panics

19. Summary

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