ChibiOS Free Embedded RTOS

I did some more digging around with git bisect, and I found the offending commit:

https://osdn.net/projects/chibios/scm/svn/commits/13496

I'm guessing it has something to do with moving around the struct port_context in the thread structure.

The simulator is segfaulting at the tip of development branch, but works fine in stable_20.3.x.

The segfault seems to happen in the context switch..

Giovanni wrote:The drawback would be that the timer object would become larger.

This could be mitigated with a compile time kernel option to enable virtual timers to be optionally configured as periodic timers.

Hi, This is a good point, VTs have been designed as one-shot timers only and, when using high resolution time, there could be an accumulating error. Perhaps VTs should have a periodic mode built-in, without having to reload the timer from the callback. The drawback would be that the timer object wo...

I took at a look at ChibiOS/os/various/evtimer.c, and it implements the last idea presented here using virtual timers: http://www.chibios.org/dokuwiki/doku.php?id=chibios:kb:timing The issue is that the timing will always be off due to the execution time it takes to get to the place where the one sh...

Thanks for looking into it. I believe it should have been here:
http://chibiforge.org/doc/20.3/rt/concepts.html

You had language similar to this in previous documentation: –“S” is a function that must be called from within a critical zone and can reschedule internally –“I” is a function that must be called from within a critical zone and does not reschedule internally However, in the current documentation the...

Hey Giovani, looks interesting ya

ARM has just released their new GCC, version is 9.2.1. https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads It's almost twice as fast on linux compared to GCC 8. Could someone check if it still produces incorrect CM0 code? As far as I know...

There are also lots of devices out there that people are currently hacking/reverse engineering that are based on the nRF4528xx

https://github.com/curtpw/nRF5x-device- ... ngineering