M204.cfg

# This is useful when trying out new slicers and you can't eliminate some acceleration
# changes but if you have LOTS of accel changes it can eat too much CPU time and cause 
# hard to track down crashes.
#
# ban setting accel above our hard limit
# allow setting with S or P perameters, ignore T as it MUST come with a P to be valid
# gcode and we only want the lower one

# Do not set to maximum if no perameters were given
# TODO only get chatty if naked M204 is sent as request for info

[gcode_macro M204]
description: Set ACCEL limieted by config and ACCEL_TO_DECEL as F x ACCEL
rename_existing:            M204.1
#default_parameter_F:        0.5 #depricated, use default() filter
gcode:
  {% set conf_max_accel = printer.configfile.settings.printer.max_accel|int %}
  {% set F = params.F|default(0.5)|float %}
  {% set S = params.S|default(0)|float %}
  {% set P = params.P|default(0)|float %}

  {% if 'S' in params %}
    {% if params.S|int < conf_max_accel %}
      SET_VELOCITY_LIMIT ACCEL={ S } ACCEL_TO_DECEL={ S|float * F|float }
    {% else %}
      SET_VELOCITY_LIMIT ACCEL={ conf_max_accel } ACCEL_TO_DECEL={ conf_max_accel|float * F|float }
      #TODO notify
    {% endif %}
  {% endif %}
  # Handle P syntax
  {% if 'P' in params %}
    {% if params.P|int < conf_max_accel %}
      SET_VELOCITY_LIMIT ACCEL={ P } ACCEL_TO_DECEL={ P|float * F|float }
    {% else %}
      SET_VELOCITY_LIMIT ACCEL={ conf_max_accel } ACCEL_TO_DECEL={ conf_max_accel|float * F|float }
      #TODO Notify
    {% endif %}
  {% endif %}