RT5	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 Printed and PDF course material (in English) The trainer answers trainees’ questions during the session and provide technical and pedagogical assistance Practical activities Practical activities represent from 40% to 50% of course duration Example code, labs and solutions Preconfigured Virtual Machine (VM) for doing labs during of after the training STM3240G-Eval physical board or Qemu emulated STM32F4-Discovery board

Prerequisites Good C programming skills (see our L2 - C language for Embedded MCUs course) Duration Total: 4 days 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 Day 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 Day 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 Day 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 Day 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
4 days	2610 € HT
Last update: 24 October 2022
This course, designed for face-to-face delivery, can be provided either in our Paris training center or, worldwide, on your premises. Scheduled classes are confirmed as soon as there is a confirmed booking.
A version tailored for live online delivery is available under reference oRT5 - Zephyr Real Time Programming
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