newRPL third demo released

[BruceH]

I'm a bit late to this project so apologies for not suggesting this earlier:

I would suggest porting Free RTOS to the calc hardware and then writing newRPL as a process, or set of processes to run under it.

This lets you focus on writing newRPL (which is the fun bit) and easily re-use pre-written code for the 'less fun' things like SD card access, serial port & USB drivers.