Learn FREERTOS with Real Code Examples
Updated Nov 27, 2025
Learning Path
Understand task creation and scheduling
Learn inter-task communication mechanisms
Practice ISR and task interactions
Explore timers and software hooks
Integrate with peripherals and connectivity stacks
Skill Improvement Plan
Week 1: Task basics and delays
Week 2: Queues, semaphores, mutexes
Week 3: ISR-safe coding and priorities
Week 4: Tickless idle and power management
Week 5: Integrate networking/IoT functionality
Interview Questions
Explain preemptive vs cooperative scheduling in FreeRTOS.
What are queues, semaphores, and mutexes?
How do you handle priority inversion?
How to integrate FreeRTOS with ISRs?
Explain tickless idle mode and low-power operation.
Cheat Sheet
xTaskCreate() -> create task
vTaskDelay() -> delay task
xQueueSend()/xQueueReceive() -> send/receive data
xSemaphoreTake()/Give() -> mutex/semaphore
vTaskStartScheduler() -> start RTOS
Books
Mastering FreeRTOS
Real-Time Operating Systems for Embedded Systems
Hands-On FreeRTOS Projects
Embedded Systems with FreeRTOS
FreeRTOS Kernel and Multitasking Guide
Tutorials
Getting started with FreeRTOS on STM32
Task creation and scheduling basics
Inter-task communication with queues
Synchronization using semaphores and mutexes
Low-power tickless idle applications
Official Docs
https://www.freertos.org/
FreeRTOS Kernel API Reference
Community Links
FreeRTOS GitHub
FreeRTOS Forum
Embedded systems Stack Overflow
Vendor-specific MCU communities
YouTube embedded tutorials
Community Support
FreeRTOS GitHub
FreeRTOS Forum
Embedded systems Stack Overflow
Vendor-specific communities (STM32, TI, NXP)
YouTube embedded tutorials