Add a Python REPL about epsilon

[titimoby]

The repl code files (.c and .h) are still here, so what's the main difficulty to have working repl ?
USB/Serial management?
Just trying to figure out the job to be done.

[Ecco]

Oh, we weren't thinking about a tethered REPL (which could be useful as well, just apparently a less requested feature).

What I was referring to was an on-device REPL (using the screen as output and the keyboard as input).

[titimoby]

a REPL is definitively a good idea, whatever the form.
I'll figure out a formulation around a USB enhancement request (either for a REPL, to transmit python script or just to have USB keyboard ;) )

[adriweb]

Apparently the OTG pin (the 5th, "ID") of the USB isn't soldered, so it's going to be hard working with that (calc can't be the host to a keyboard automatically, I suppose).
Maybe it could be setup manually however (enabling such mode in the settings)

[titimoby]

i didn't found precise info on what to do to activate OTG on this chip.
I just found mention that the ID pin (4th) need to be grounded.
But that sound weird.

[artaxxx]

Fixed in the last version 1.2.0