Added code guards in order to free some memory for STM32F103 variants with 128K flash.
Changed Stop (0x19) real-time command behaviour, active tool offset and coordinate system will now be kept. Ref. issue #610.
Sub name matches filename with extension .macro.
Added core event for handling special gcode comments used by expressions and flow control: DEBUG, PRINT and ABORT.
Added overrideable default $-setting values for second PWM spindle to grbl/config.c.
Added support for LinuxCNC style (ABORT,<msg>) comment, requires expressions enabled. Terminates gcode program, outputs message and returns error 253.
Added PRM[<setting>] and PRM[<setting>,<bit>] functions to expressions, returns $-setting value or value of bit in integer type setting.
"hardened" flow control code, fixed bug in repeat...continue handling.
Changed signature of grbl.on_gcode_comment event, now returns status code.
Fixed incorrect comment string passed to passed to grbl.on_gcode_comment event.
Added generic redirector for temporarily changing input stream to read from a file. Supports nesting.
Added clear of return value on CALL statement and added optional return value expression support to ENDSUB.
Improved handling of multiple simultaneous spindles. Still work in progress.
For developers: moved user M-code entry point hooks from the HAL structure to the core handlers and changed signature of the check() function to better support valueless words (letters) when parameter support is enabled. Removed deprecated parameter from the validate() call signature.
Fixed incorrect handling of G65 call parameters, axis words had offsets added. Ref. issue #594.
Refactored handling of multiple spindles. There are still some limitations but should work better now. Disabled override delays for now, needs investigation. Ref. issue #598.
NOTE: Please report any erratic behaviour after installing this version since it is a rather major change.
Added named parameters for getting absolute (G53) position: _abs_x, abs_y, ...
Available when expression support is enabled.
Changed stepper enable HAL signature to allow current reduction when idle.
Added reference id to spindle registration in order to allow configuring default spindle, and possibly additional spindles, at compile time.
Fixes issues for programs containing extended M-codes using single meaning words (which they as a rule should not do).
Added core support for spindle encoder binding to spindles.
Added sorting of spindle report: enabled spindles are sorted first in order of spindle number, disabled by type then spindle id.
Changed realtime report to report spindle number instead of spindle id on changes in the |S: element.
Added setting $358 to enable experimental functionality for fast rotary 'rewind' to stored G28 position.
Return move should complete in half a rotation or less.
For developers: added option to redirect debug via driver provided function when DEBUGOUT is set to -1 in config.h. Ref. issue #545.
Added experimental support of LinuxCNC style subroutines.
Available for gcode run from local filesystem such as on a SD card or in littlefs.
Improved handling of G92 when G92 offset is changed while motion is ongoing. Ref. issue #241.
Fix for issue #521, crash when running G65 macro on ESP32.
"Hardened" stream switching code, likely fix for discussion #456.
Hide related settings when no spindle and/or coolant outputs are available. From PR #479.
Fixed typo related to Modbus direction signal. Ref. issue #478.
Fixed typo in handling of aux output port settings. Ref issue #476.
Fix for unable to set $484 to 0, issue #466.
Added setting $673 for setting coolant on delay after feedhold. Available when safety door handling is not enabled.
Fixed obscure bug carried over from legacy Grbl related to this. Issue #467.
Enabled setting $394 for spindle on delay after feedhold. Available when safety door handling is not enabled.
Added definitions for up to four additional digital aux I/O ports.
Added real time report of selected spindle in multi spindle configurations. Reported on changes only.
Removed limits override input invert config, for safety reasons it is always active low.
Added HAL entry points for second RGB channel, renamed first from hal.rgb to hal.rgb0.
Added option to setting $22 to force use of limit switches for homing when homing inputs are available in the driver/board combo.
Improved handling of aux I/O pins when claimed for core functions.
Added flag to $9 for disabling laser mode capability for primary PWM spindle. Allows leaving laser mode enabled when a secondary PWM spindle is available and this is used to control a laser.
Added some generic setting definitions for stepper drivers, currently used by the motors plugin.
Fixed incorrect reporting of feed rate modes in $G response.
Added some ioPorts call wrappers, full support for reconfiguring output auxillary pins for PWM output.
Allowed use of unused (by the core) axis words (ABCUVW) in M-code commands implemented by plugin code.
Added $PINSTATE command, for outputting auxillary pin states, modes and capabilities. Machine readable formatting.
