The Zephyr™ Project – An Updated Overview
summary
Zephyr is a modular RTOS that runs in 8K RAM and adds real features: 1.5 integrates mbed TLS, MQTT, OTA/software updates, USB CDC, FAT and DMA and many sensor drivers; a native IP stack aims for TCP/IPv4/IPv6/UDP/6LoWPAN parity with the Contiki stack. The tree moves to a unified kernel in master (nanokernel+microkernel merged) with a single thread model (cooperative vs preemptive by priority) and quarterly releases; kernel changes produce 6x semaphore speedup (ARM 10–20x reported).
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chapters (22)
- 0:00Intro
- 0:59What is Zephyr
- 1:35Current platinum members
- 4:48Zephyr Project Architecture
- 7:10Zephyr Releases
- 10:12Zephyr 1.6 (11/2016)
- 12:05Driver Frameworks & HALS
- 15:17Hardware Support Hierarchy
- 16:16Security
- 19:19A bit of history
- 20:28The Good
- 23:09Schedulers
- 26:18Microkernel's message passing
- 28:11Taking a microkernel semaphore
- 28:58The Bad
- 31:27The Ugly: trying to remove confusion
- 32:07Solution ? Unify the kernels
- 36:18Taking a unified kernel semaphore
- 37:05Other benefits
- 38:03Let's talk numbers
- 38:48x86 improvements
- 40:49Summary
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