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Re:PilOS – A Stand-Alone Operating System by joeyo on Friday June 19, 2015 @11:16PM (#9748825)
In case you aren't aware of them, eLua [1] or PIC32Lua [2] may fit your needs.

  1. http://www.eluaproject.net/overview/status
  2. https://github.com/FMMT666/PIC32Lua
Re:PilOS – A Stand-Alone Operating System by _sh on Friday June 19, 2015 @11:43PM (#9748879)
Also picobit for scheme goodness: https://github.com/stamourv/picobit

Doesn't support full numeric tower (no floats), but does implement 'unbound precision integers'. See §5.1 of this paper: http://www.iro.umontreal.ca/~feeley/papers/StAmourFeeleyIFL0...

Re:PilOS – A Stand-Alone Operating System by analog31 on Friday June 19, 2015 @11:35PM (#9748860)
That looks quite interesting. Thanks! I've actually got some PIC32 chips left over from another project.