Switched to full Steinhart Hart equation for temperature computation,
with a python script to compute the equation coefficients given a
thermistance characteristic.
+ removed some warnings
Deactivate temperature and home-switches. X and Y stepper ok.
Mirrored Z=X and E=Y axis so far, independant command on the way.
Switched stepper variable from flat to structured, with an array of
structure containing all steppers (allows 'for' loops to control
everything now)
Also made the dir/step GPIO pin structured, to have a generic timer
interrupt processing function.
Full 4 axis working independantly.
Steppers GPIO and Timers now configured from each axis structure.