Re: [distortos-development] Newbie getting started

[Trampas S. <tr...@gm...>]

I was looking through some FreeRTOS documentation on how the Cortex M
processors work with RTOSs.  I personally like the ground up approach to
learning new things...   I was hoping that maybe you had a blog going
through the ground up on DISTOREC?

I will go through and see if I can figure it out either way...

Thanks
Trampas

On Sat, Feb 3, 2018 at 12:01 PM, Kamil Szczygieł <dis...@di...>
wrote:

> On Sat, 2018-02-03 at 11:46 -0500, Trampas Stern wrote:
> > I am new to RTOS and distortos, does someone have some good
> > documentation on how distortos works and how to get started?
>
> Hello Trampas!
>
> You can find some documentation on project's website
> http://distortos.org/
>
> Of special interest are following articles:
> http://distortos.org/documentation/arm-toolchain-windows/
> http://distortos.org/documentation/creating-configuring-project-eclipse/
>
> There's also API reference generated with doxygen
> http://distortos.org/api-reference/
>
> Some info can also be obtained from the changelog in the repository
> https://github.com/DISTORTEC/distortos/blob/master/CHANGELOG.md
>
> Generally I'm afraid that documentation and guides are not very good at
> this moment... However if you need some guidance or if you have
> specific questions I will be more than happy to help you and answer
> your questions.
>
> As to "how distortos works" - it basically works in the same way as any
> other RTOS. When a context switch is required it is performed in
> interrrupt (PendSV in case of ARMv6-M and ARMv7-M) - registers of first
> thread are "pushed" on its stack (1), then its stack pointer is saved
> in its thread control block (2), next thread control block is marked as
> active (3), its stack pointer register is restored (4), then the
> registers of this thread are "popped" from stack (5). This is one of
> very few pieces of code in distortos which is (partially) written in
> assembly language, thus not very friendly for a beginner.
>
> (1) - https://github.com/DISTORTEC/distortos/blob/
> 7d58c175f4fd4e2150033fbddf662f69ff1dd910/source/architecture/ARM/ARMv6-M-
> ARMv7-M/ARMv6-M-ARMv7-M-PendSV_Handler.cpp#L149
>
> (2) - https://github.com/DISTORTEC/distortos/blob/
> 7d58c175f4fd4e2150033fbddf662f69ff1dd910/source/scheduler/
> Scheduler.cpp#L254
>
> (3) - https://github.com/DISTORTEC/distortos/blob/
> 7d58c175f4fd4e2150033fbddf662f69ff1dd910/source/scheduler/
> Scheduler.cpp#L255
>
> (4) - https://github.com/DISTORTEC/distortos/blob/
> 7d58c175f4fd4e2150033fbddf662f69ff1dd910/source/scheduler/
> Scheduler.cpp#L257
>
> (5) - https://github.com/DISTORTEC/distortos/blob/
> 7d58c175f4fd4e2150033fbddf662f69ff1dd910/source/architecture/ARM/ARMv6-M-
> ARMv7-M/ARMv6-M-ARMv7-M-PendSV_Handler.cpp#L162
>
> Regards,
> Kamil Szczygiel
>