obiwanjacobi:
Thanks for the link, didn't know that lib. I will look into it.
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I am currently testing a way for lightweight cooperative mutlitasking. Once I figured out how to do async time delays I can go to town on supporting other typical devices (I2C, LCD etc).
You are welcome. Here are a few links to Proto-threads which is a style of implementing coroutines. These are actually from the comment block in Cosa/Thread.hh, http://dl.dropboxusercontent.com/u/993383/Cosa/doc/html/d0/d51/classThread.html and https://github.com/mikaelpatel/Cosa/blob/master/Cosa/Thread.hh.
[1] Adam Dunkels et al, Protothreads: Simplifying Event-Driven Programming of Memory-Constrained Embedded Systems, SenSys'06, November 1-3, 2006, Boulder, Colorado, USA.
[2] Larry Ruane, protothread: An extremely lightweight thread library for GCC, Google Code Archive - Long-term storage for Google Code Project Hosting.
[3] Protothread - Wikipedia
It is possible to avoid the "switch" problem by using gcc local labels and label address. The Cosa implementation is object-oriented and fully integrated with the Cosa periodic timer queue.
Cheers!