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loop_sdcard: Add loopable SD card file sections

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To support continuous belt printing, add nestable repeat
loop support via an `[sdcard_loop]` module.

Supported G-Code:
  - SDCARD_LOOP_BEGIN COUNT=n  ; Loop for N times, or infinitely if N is 0
  - SDCARD_LOOP_END            ; End of loop
  - SDCARD_LOOP_DESIST         ; Complete all loops without iterating

Marlin M808 compatibility example in `config/sample-macros.cfg`:
  - M808 Ln        ; Loop for N times, or infinitely if N is 0
  - M808           ; End of loop
  - M808 K         ; Complete all loops without iterating

Added unit tests in test/klippy/sdcard_loop.test

See https://reprap.org/wiki/G-code#M808:_Set_or_Goto_Repeat_Marker

Signed-off-by: Jason S. McMullan <jason.mcmullan@gmail.com>
This commit is contained in:
Jason S. McMullan 2021-04-17 06:54:12 -04:00 • committed by KevinOConnor
parent 4ea434796b
commit 913649de2e
8 changed files with 577 additions and 3 deletions
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12
config/sample-macros.cfg
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@ -176,3 +176,15 @@ gcode:
"Humidity: %.2f%%" % (
sensor.temperature,
sensor.humidity))}
# SDCard 'looping' (aka Marlin M808 commands) support
#
# Support SDCard looping
[sdcard_loop]
# 'Marlin' style M808 compatibility macro for SDCard looping
[gcode_macro M808]
gcode:
{% if params.K is not defined and params.L is defined %}SDCARD_LOOP_BEGIN COUNT={params.L|int}{% endif %}
{% if params.K is not defined and params.L is not defined %}SDCARD_LOOP_END{% endif %}
{% if params.K is defined and params.L is not defined %}SDCARD_LOOP_DESIST{% endif %}