Thursday, November 23, 2017

JuluOSDev - Comprehensive System Software Study Group

The discussion and official page of the club are on the Facebook: 

Before going to the U.S, I was the co-founder of the JuluOSDev clud, which focuses on discussion of so many different system software, FreeBSD, RTOS, Microckernel, Nanokernel, Exokernel, Virtualization and IoT systems. When I co-founded the JuluOSDev, there were only 7 members; however, after core members' effort, the group has been expanded to 700+ members now. It was the wonderful experience because we knew a lot of OS contributors in Taiwan via the talk invitations and knowledge sharing.

Although I am not the co-founder now, I still hope this group can keep expanding in order to leave the space for us to discussion about different system software instead of only major OS, Linux.

Wednesday, April 12, 2017

[Systematical Case Study] Zephyr Inside Shell

Overview: File Usages

Whole Article:

Keywords: Interrupt, ISR, UART Driver, console driver, ISR, IDT, Callback.

This case study comprehensively surveys zephyr through understanding of shell’s internal implementation.  It includes shell functions, console driver, UART driver, ISR set-up, hardware configuration, system initialization, and related IDT mechansims.

To understand the interactivities between task, fiber, driver, interrupts and hardware, case study of Shell implementation is representative. It contains prompt, console driver, UART driver, and related hardware configurations. When I was programming the final assignment, due to my adoption of the Nanokernel, I must ensure that it is achievable to use shell, task, and fibers without related scheduling problems. Through examination of shell implementation, I understood how Zephyr works.