Support concurrenrt execution of commands form different channels
M143 now supports individual temperature limits per heater
Fixed issue with dely of up to 2 seconds when switching Duet WiFi heater
channel 3 to servo mode
When enable polarity is set using the M569 R parameter, disable the
corresponding drive
Add exdperimental S99 option on G1 command to log probe changes (Duet
WiFi only)
Added DueX2/DueX5 support
Report expansion board type in electronics string
Added Z probe type 6 (switch on E1 stop)
Support heater 6 on Duet 0.8.5 (untested, probably incomplete)
Changed M42 pin numbering, see duet3d.com wiki
Added M280 servo support
Allow separate firmware un-retract speed to be configured in M207
Allow negative extra un-retraction in M207
Allow dans ot be disabled yusing M106 P# I-1. They can then be used as
general-purpose pins (m42) or servos (M280).
Removed support for Duet WiFi prototype 1 board
Support expanson pin PB6 and use it for cooling fan tacho
Implemented X axis set and report mapping in M563 command and in web and
M408 status responses (but mapping doesn;t do anything yet)
Report number of axes to DWC
M307 H# A-1 C-1 D-1 disables the pid controller for that heater to free
up the pin
Debug print of matrixes during delta calibration is now to 4dp
Implemented fan blip
Max temperature excursion and fault trigger time are now configurable
via M570
If a heater fault occurs then any SD card print in progress is abandoned
Improved M122 diagnostics headings
Bug fix: some values of pressure advance caused too many extruder steps
to be schedules, resulting in extruder step errors, and another bug in
the error handling then caused layer shifts
Fixed doubling of M301 I parameter and halving of M301 P parameter
Implemented M303 auto tune and M307 heater process model
Improved temperature monitoring to detect heater cartridges or
thermistor falling out
Implemented M38 (thanks chrishamm)
Retructured course code tree
