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display: Replace hard-coded display with new config based display

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Introduce a new config based system for specifying the on-screen
contents of an lcd screen.  The default screen configuration (found in
klippy/extras/display/display.cfg) is the same as the previous
hard-coded display, so this should not change behavior for existing
users.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-02-16 15:22:16 -05:00
parent 5acc181624
commit 2cf03ffa23
5 changed files with 379 additions and 171 deletions
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43
config/example-extras.cfg
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@ -1774,6 +1774,12 @@
# A reset pin may be specified on ssd1306 displays. If it is not
# specified then the hardware must have a pull-up on the
# corresponding lcd line.
#display_group:
# The name of the display_data group to show on the display. This
# controls the content of the screen (see the description of
# [display_data] below for more information). The default is
# _default_20x4 for hd44780 displays and _default_16x4 for other
# displays.
#menu_root:
# Entry point for menu, root menu container name. If this parameter
# is not provided then default menu root is used. When provided
@ -1825,6 +1831,43 @@
# The resistance range for a 'kill' button. Range minimum and maximum
# comma-separated values must be provided when using analog button.
# Support for displaying custom data on an lcd screen. One may create
# any number of display groups and any number of data items under
# those groups. The display will show all the data items for a given
# group if the display_group option in the [display] section is set to
# the given group name.
#[display_data my_group_name my_data_name]
#position: 0, 0
# Comma separated row and column of the display position that should
# be used to display the information. This parameter must be
# provided.
#text:
# The text to show at the given position. This field is evaluated
# using command templates (see docs/Command_Templates.md). This
# parameter must be provided.
# Display data text "macros" (one may define any number of sections
# with a display_template prefix). This feature allows one to reduce
# repetitive definitions in display_data sections. One may use the
# builtin render() function in display_data sections to evaluate a
# template. For example, if one were to define [display_template
# my_template] then one could use "{ render('my_template') }" in a
# display_data section.
#[display_template my_template_name]
#param_<name>:
# One may specify any number of options with a "param_" prefix. The
# given name will be assigned the given value (parsed as a Python
# literal) and will be available during macro expansion. If the
# parameter is passed in the call to render() then that value will
# be used during macro expansion. For example, a config with
# "param_speed = 75" might have a caller with
# "render('my_template_name', param_speed=80)". Parameter names may
# not use upper case characters.
#text:
# The text to return when the render() function is called for this
# template. This field is evaluated using command templates (see
# docs/Command_Templates.md). This parameter must be provided.
######################################################################
# Filament sensors