# Developing yet another small RTOS for Cortex-M3.

**URL:** <https://community.sparkfun.com/t/developing-yet-another-small-rtos-for-cortex-m3/10965>\
**Category:** MicroMod\
**Tags:** arm-lpc\
**Created:** [April 28, 2009, 11:22am UTC](https://community.sparkfun.com/t/developing-yet-another-small-rtos-for-cortex-m3/10965 "2009-04-28T11:22:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Earendil](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Earendil](https://community.sparkfun.com/u/Earendil)\
**Post date:** [April 28, 2009, 11:22am UTC](https://community.sparkfun.com/t/developing-yet-another-small-rtos-for-cortex-m3/10965/1 "2009-04-28T11:22:36Z")

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I am currently developing a small RTOS kernel (initially) targetted at the STM32. It’s just for fun, nothing serious so far. I intend to write a few words of my daily/weekly progress here:

[http://embedded-sparetime.blogspot.com/](http://embedded-sparetime.blogspot.com/)

If anyone is interested you’re more than welcome to comment!

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**Author:** ![inventore123](https://avatars.discourse-cdn.com/v4/letter/i/b9bd4f/32.png) [@inventore123](https://community.sparkfun.com/u/inventore123)\
**Post date:** [July 6, 2009, 6:59pm UTC](https://community.sparkfun.com/t/developing-yet-another-small-rtos-for-cortex-m3/10965/2 "2009-07-06T18:59:14Z")

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Nice 🙂

I’m developing my RTOS too, but for the ARM7.

As a proof of concept it is currently used in my mp3 player

(video here [http://www.youtube.com/watch?v=5PQ1JJcI … re=channel](http://www.youtube.com/watch?v=5PQ1JJcIWzw&feature=channel))

I still remember the first time I got it to blink two leds from two threads…

:roll:

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**Author:** ![Earendil](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Earendil](https://community.sparkfun.com/u/Earendil)\
**Post date:** [July 6, 2009, 9:09pm UTC](https://community.sparkfun.com/t/developing-yet-another-small-rtos-for-cortex-m3/10965/3 "2009-07-06T21:09:10Z")

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I’m really impressed! You are way ahead of me 😉 The GUI design is nice, slightly inspired by the iPhone, maybe? I am heading towards a project somewhat in the style of yours, but my spare time is simply too limited… I have a proper context switch working for the Cortex M3 now, so that’s a good start anyway.

I’d love to see how your project evolves!