分享一下Linux Foundation前幾天宣佈Open source Zephyr™ Project. 目前已提供v1.0.0 source code下載

• https://www.zephyrproject.org

1. Project Overview

Project宗旨	在IoT device上打造一個模組化設計且開源的小型RTOS Zephyr kernel能運行在只有 10KB RAM 的 32 位微控制器上，相比之下uClinux 需要 200KB RAM。
Source code	Zephyr Kernel v1.0.0 Release Notes https://www.zephyrproject.org/content/zephyr-kernel-v100-release-notes
Project成員	1. Intel 2. NXP 3. Synopsys
Project授權	Apache License, version 2.0
Project特色	CPU architecture independent Minimal footprint — can run in as little as 10KB Modular and scalable  Highly secure Seemless connectivity, supporting a broad range of wireless and wired technologies Powerful developer tools Open source kernel (and perhaps other components), released under the Apache v2.0 License
應用場景	Simple embedded environmental sensors. LED wearables to sophisticated smart watches. IoT wireless gateways.

2. Zephyr v1.0.0 支援的板子

x86 Instruction Set	Arduino 101 Quark D2000 CRB Galileo Gen1/Gen2 Minnowboard Max X86 Emulation (QEMU)
ARM (v7-M and v7E-M) Instruction Set	ARM Cortex-M3 Emulation (QEMU) Arduino Due Freescale FRDM-K64F
ARC EM4 Instruction Set	Arduino 101

3. Zephyr SDK

提供Zephyr SDK v0.7.2可下載, 其中包含toolchain以及QEMU, 可在x86平台上開發ARM/MIPS等等的程式

https://www.zephyrproject.org/content/zephyr-sdk-v072

GCC 5.2.0 cross-compiler for x86 + binutils + gdb, libgcc, newlib GCC 5.2.0 cross-compiler for ARM + binutils + gdb, libgcc, newlib (multilib) GCC 5.2.0 cross-compiler for MIPS + binutils + gdb, libgcc, newlib (multilib) GCC 5.2.1 cross-compiler for IAMCU + binutils + gdb, libgcc, newlib GCC 4.8.3 cross-compiler for ARC + binutils + gdb, libgcc, newlib (multilib) GCC 5.2.0 host compiler for i686, binutils, glibc 2.22 Python2.7 QEMU emulators version 2.1.3: qemu-system-arm (zephyr specific patch) qemu-system-mips qemu-system-i386 make (GNU Make 4.1) OpenOCD (Open On-Chip Debugger with additional Quark support)

4. Source code overview

下載zephyr回來看, 可以發現設定/操作跟Linux kernel source很像. 使用上有light weight Linux的錯覺. 難怪國外也有人說Zephyr是Linux little brother ~

目前 zephyr 支援下列SoC

對於IoT device重視的security, Zephyr也提供完整的cryptography library

只有2KB的 kernel真是嚇人, 相信之後會有越來越多的IoT device使用 Zephyr

 

ref:

[1] https://www.zephyrproject.org

[2] http://www.linuxfoundation.org/news-media/announcements/2016/02/linux-foundation-announces-project-build-real-time-operating-system