Fixed several bugs in file time stamping
Fixed M280 and M42 commands using unused heaster channels on Duet 0.6
and 0.8.5
Reduced the amount of I2C traffic, by using DueX5 interrupt line to tell
if new data is available and by only sending fan PWM values when they
change
Display TMC2660 driver status and DueX2/X5 stall status in M122 response
Removed E parameter from M574 command (use M558 I parameter instead)
Fixed response to M307 with H parameter 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
Changes to reduce incidence of false heating fault alarms, in particular
"temperature rising much more slowly than the expected 0.0C"
Stepper drivers beyond the first 5 are assumes to be non-TMC2660 drivers
Increased max number of probe points to 64 on Duet WiFi and 32 on Duet
0.6/0.8.5
Corrected M37 reporting of simulation time
Added move debug facility
Added recording of more types of move underrun
Use fabsf instead of fabs
M21 doesn't re-mounjt a drive that is aloready mounted and has open
files on it
Added "volumes" variable in extended status report
Report card details after M21 is called
Bug fix: M220 speed changes were nott being implemented as soon as they
should be
Bug fix: lookahead was sometimes failing to join sequences of short
decelerating moves together
Bug fix: at startup the thermistor readings were sometimes very high,
which triggered a bug in strtod() called in PanelDue firmware 1.14 and
earlier
