Add initial support for Canvas on CC1

meta-opencentauri/images/opencentauri-image-base.bb

@@ -19,6 +19,7 @@ CORE_IMAGE_EXTRA_INSTALL += "\
     wpa-supplicant \
     iw \
     kalico \
+    klipper-extras-canvas \
     moonraker \
     mainsail \
     fluidd \

meta-opencentauri/recipes-apps/klipper-extras/klipper-extras-canvas/canvas.cfg

@@ -0,0 +1,198 @@
+# Elegoo CANVAS Lite — Klipper configuration
+#
+# Copy this into your printer.cfg or use:  [include elegoo_canvas.cfg]
+#
+# =====================================================================
+# CONNECTION NOTES
+#
+# The CANVAS Lite has TWO serial interfaces:
+#
+#   1. USART2 (Modbus RTU) — the proper control protocol.
+#      This is the connector that normally goes to the Elegoo printer.
+#      To use with Klipper, wire a USB-to-UART adapter (FTDI/CH340/CP2102)
+#      to the USART2 TX/RX pins on the CANVAS PCB or its printer connector.
+#      Use mode: modbus (recommended).
+#
+#   2. USB CDC (debug CLI) — the STM32's own USB port (VID 0483:5740).
+#      Appears as /dev/ttyACMx when plugged in.  Provides a limited
+#      debug console with feed_cmd / unload_cmd commands.
+#      Use mode: cli (fallback if you only have the USB cable).
+#
+# Find your serial port:
+#   ls /dev/serial/by-id/
+#   ls /dev/ttyACM* /dev/ttyUSB*
+# =====================================================================
+
+#[canvas]
+#serial: /dev/serial/by-id/REPLACE_ME
+#   Serial device path.  Use /dev/serial/by-id/... for a stable name.
+
+#mode: modbus
+#   'modbus' — Modbus RTU over UART (recommended, full control)
+#   'cli'    — USB CDC debug CLI (limited, fallback only)
+
+#baud: 115200
+#   Baud rate.  115200 for Modbus.  Ignored for USB CDC but harmless.
+
+#slave_address: 2
+#   Modbus slave address.  The CANVAS Lite defaults to 2.
+
+#serial_timeout: 0.5
+#   Seconds to wait for a Modbus response frame.
+
+#retries: 2
+#   Modbus transaction retry count on CRC/timeout errors.
+
+#load_timeout: 45
+#   Max seconds to wait for a filament load operation.
+
+#unload_timeout: 45
+#   Max seconds to wait for a filament unload operation.
+
+#poll_interval: 0.5
+#   Seconds between state polls during load/unload.
+
+#min_operation_wait: 3.0
+#   Minimum seconds to wait before polling for completion.
+
+#cli_command_wait: 15
+#   Fixed wait (seconds) after a CLI command (cli mode only).
+
+
+# =====================================================================
+# TOOL CHANGE MACRO
+#
+# Adjust the variables below for your physical setup.
+# The macro handles: tip forming, bowden retract, CANVAS switch,
+# bowden feed, purge, and position restore.
+#
+# Set bowden_length to the distance (mm) from the CANVAS output port
+# to your extruder gears.  Leave at 0 to skip bowden moves (if the
+# CANVAS output connects directly to your extruder or you handle it
+# elsewhere).
+# =====================================================================
+
+[gcode_macro _CANVAS_TOOLCHANGE]
+description: Internal: Elegoo CANVAS filament change sequence
+variable_active_tool: -1
+# Distance from CANVAS output to extruder gears (mm).  0 = skip.
+variable_bowden_length: 0
+# Tip-forming retraction distance (mm)
+variable_tip_retract: 2.0
+# Extra purge after loading new filament (mm)
+variable_purge_length: 30
+# Speeds (mm/s)
+variable_retract_speed: 30
+variable_bowden_speed: 60
+variable_purge_speed: 3
+# Park position for tool changes.  Both must be >= 0 to enable.
+variable_park_x: -1
+variable_park_y: -1
+variable_park_speed: 150
+gcode:
+    {% set new = params.T | int %}
+    {% set cur = printer["gcode_macro _CANVAS_TOOLCHANGE"].active_tool | int %}
+
+    {% if cur != new %}
+        {% set bowden  = printer["gcode_macro _CANVAS_TOOLCHANGE"].bowden_length | float %}
+        {% set tip     = printer["gcode_macro _CANVAS_TOOLCHANGE"].tip_retract | float %}
+        {% set purge   = printer["gcode_macro _CANVAS_TOOLCHANGE"].purge_length | float %}
+        {% set ret_spd = (printer["gcode_macro _CANVAS_TOOLCHANGE"].retract_speed | float * 60) | int %}
+        {% set bow_spd = (printer["gcode_macro _CANVAS_TOOLCHANGE"].bowden_speed | float * 60) | int %}
+        {% set pur_spd = (printer["gcode_macro _CANVAS_TOOLCHANGE"].purge_speed | float * 60) | int %}
+        {% set pk_x    = printer["gcode_macro _CANVAS_TOOLCHANGE"].park_x | float %}
+        {% set pk_y    = printer["gcode_macro _CANVAS_TOOLCHANGE"].park_y | float %}
+        {% set pk_spd  = (printer["gcode_macro _CANVAS_TOOLCHANGE"].park_speed | float * 60) | int %}
+
+        SAVE_GCODE_STATE NAME=canvas_tc
+
+        ; --- park (optional) ---
+        {% if pk_x >= 0 and pk_y >= 0 %}
+            G90
+            G1 X{pk_x} Y{pk_y} F{pk_spd}
+        {% endif %}
+
+        ; --- unload current filament ---
+        {% if cur >= 0 %}
+            ; tip forming: retract, partial push, longer retract
+            M83
+            G1 E-{tip}          F{ret_spd}
+            G1 E{tip * 0.5}     F{ret_spd}
+            G1 E-{tip * 1.5}    F{ret_spd}
+
+            ; pull filament out of bowden tube
+            {% if bowden > 0 %}
+                G1 E-{bowden}   F{bow_spd}
+            {% endif %}
+
+            ; CANVAS: retract filament back into spool slot
+            CANVAS_UNLOAD CHANNEL={cur}
+        {% endif %}
+
+        ; --- load new filament ---
+        CANVAS_SELECT CHANNEL={new}
+        CANVAS_LOAD CHANNEL={new}
+
+        ; push filament through bowden tube to hotend
+        {% if bowden > 0 %}
+            M83
+            G1 E{bowden}        F{bow_spd}
+        {% endif %}
+
+        ; purge to clear old material
+        {% if purge > 0 %}
+            M83
+            G1 E{purge}         F{pur_spd}
+        {% endif %}
+
+        ; small retract to reduce ooze
+        M83
+        G1 E-{tip}              F{ret_spd}
+
+        RESTORE_GCODE_STATE NAME=canvas_tc MOVE=1 MOVE_SPEED={pk_spd / 60}
+
+        SET_GCODE_VARIABLE MACRO=_CANVAS_TOOLCHANGE VARIABLE=active_tool VALUE={new}
+    {% endif %}
+
+
+# =====================================================================
+# T0 – T3 MACROS
+#
+# These are called by the slicer (or manually) to switch filament.
+# =====================================================================
+
+[gcode_macro T0]
+description: Select filament channel 0
+gcode:
+    _CANVAS_TOOLCHANGE T=0
+
+[gcode_macro T1]
+description: Select filament channel 1
+gcode:
+    _CANVAS_TOOLCHANGE T=1
+
+[gcode_macro T2]
+description: Select filament channel 2
+gcode:
+    _CANVAS_TOOLCHANGE T=2
+
+[gcode_macro T3]
+description: Select filament channel 3
+gcode:
+    _CANVAS_TOOLCHANGE T=3
+
+
+# =====================================================================
+# OPTIONAL: set the initial tool at print start so the first T command
+# knows whether an unload is needed.  Call from your START_PRINT macro:
+#
+#   CANVAS_INIT_TOOL T=0
+# =====================================================================
+
+[gcode_macro CANVAS_INIT_TOOL]
+description: Set the initial tool without performing a full change
+gcode:
+    {% set t = params.T | default(0) | int %}
+    SET_GCODE_VARIABLE MACRO=_CANVAS_TOOLCHANGE VARIABLE=active_tool VALUE={t}
+    CANVAS_SELECT CHANNEL={t}
+    CANVAS_LOAD CHANNEL={t}