oRT5	Zephyr Real Time Programming

Real-time programming applied to the Zephyr operating system

Objectives Learn how to develop, configure, debug and trace Zephyr applications Discover the real time multitasking concept Understand Real Time constraints Determinism Preemption Interrupts Understand the Zephyr kernel Services Learn communication and synchronization mechanisms Interactions with processor architecture features Understand Zephyr memory management and data structures

Course environment Theoretical course PDF course material (in English) Course dispensed using the Teams video-conferencing system The trainer to answer trainees’ questions during the training and provide technical and pedagogical assistance through the Teams video-conferencing system Practical activities Practical activities represent from 40% to 50% of course duration The trainer has access to trainees’ Online PCs for technical and pedagogical assistance. Example code, labs and solutions

Virtual Machine with System Workbench for STM32 with GNU ARM Eclipse QEMU Emulated board STM32F4-Discovery Prerequisites Good C programming skills (see our oL2 - C Language for Embedded MCUs course) Duration Total: 24 hours 4 sessions, 6 hours each (excluding break time) From 40% to 50% of training time is devoted to practical activities Some Labs may be completed between sessions and are checked by the trainer on the next session

First Session Real-Time Concepts Base real time concepts The Real Time constraints Multi-task and real time Tasks and Task Descriptors Content of the task descriptor List of task descriptors Context Switch Introduction to Zephyr Zephyr Project Zephyr Ecosystem Why use Zephyr Install and use Zephyr Build and Configuration Systems West CMake Kconfig and configuration overlay Configuration tools: menuconfig and guiconfig Zephyr Without Threads Operation without Threads GPIO Random Number Generation Utilities Data Structures Single-linked List Double-linked List Ring Buffers Exercise:  Hello World from Zephyr, configure and blink LEDs using Zephyr Exercise:  Manage Zephyr linked list and understand container_of macro Scheduling Task Scheduling and Preemption Tick based or tickless scheduling Scheduling systems and schedulability proof Fixed priorities scheduling RMA and EDF scheduling Scheduling through Zephyr Scheduling Algorithm Cooperative Time Slicing Preemptive Time Slicing Second Session Thread Management Thread Control Block Creating Threads Threads Priorities Thread States Main and Idle Threads Delays Changing Thread Priority Suspending Threads Kernel Structures Simple linked-list ready queue Red/black tree ready queue Traditional multi-queue ready queue Thread Custom Data Scheduling Traces Runtime Statistics User-Defined Tracing Percepio Tracealyzer Exercise:  Create and manage threads Exercise:  Create periodic threads Exercise:  Create config overlay for visual trace diagnostics using Tracealyzer

Memory Management in Zephyr Memory Managers Dynamic memory managers K_heap System heap Memory Slabs Memory Blocks Heap Listeners Stack Overflow detection Exercise:  Understand dynamic memory allocation in Zephyr Exercise:  Display threads information and detect stack overflow Third Session Resource Management Mutual Exclusion Critical Sections Mutexes Gatekeeper threads Atomic Lock-Free Data Structures SpinLocks Exercise:  Implement mutual exclusion between threads Synchronization Primitives Synchronization Semaphores The Readers/Writer Problem Condition variables Events and Event Groups Polling Exercise:  The producer-consumer problem, synchronize and avoid concurrent access problems Exercise:  Understanding event bit group by synchronizing several threads Fourth Session Data Passing Message Queues Pipes Queues FIFOs LIFOs Mailboxes Stacks Exercise:  Create a print gatekeeper thread using message queue Interrupt Management Threads and Interrupts Interrupts in zephyr Interrupts on ARM Cortex-M Handler thread Queue within an ISR Workqueue Threads Power Management Exercise:  Understand how to wait on multiple events and interrupt safe APIs Exercise:  Understand how to pass data using Queues from an interrupt to a thread Exercise:  Create and submit work items from interrupts to custom WorkQueue Software Timers Timers Defining a Timer Using a Timer Expiry Function Timer types One-shot timers Auto-reload timers Timer Commands Exercise:  Understand the use of one-shot and auto-reload timers

 

Duration	Cost	Calendar
24 hours	2610 € HT
Last update: 24 October 2022
This course was designed specifically to be provided online, by one of our skilled trainers. Scheduled classes are confirmed as soon as there is a confirmed booking.
A version tailored for face-to-face delivery is available under reference RT5 - Zephyr Real Time Programming
Next Scheduled Open Courses
From 9 to 12 May 2023	-	Online EurAsia (9h-16h CET)
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