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display: Make hd44780 glyphs configurable

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Allow the 20x4 hd44780 screen glyphs to be customizable from the
config file.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2020-06-08 22:04:24 -04:00
parent 1a7e4e51b3
commit 7713986ae1
6 changed files with 179 additions and 115 deletions
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10
config/example-extras.cfg
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@@ -1913,7 +1913,15 @@
# pixel) where '.' is a blank pixel and '*' is an on pixel (e.g.,
# "****************" to display a solid horizontal line). Put each
# display line into a separate config line. The glyph must consist
# of exactly 16 lines with 16 bits each.
# of exactly 16 lines with 16 bits each. This parameter is optional.
#hd44780_data:
# Glyph to use on 20x4 hd44780 displays. The glyph must consist of
# exactly 8 lines with 5 bits each. This parameter is optional.
#hd44780_slot:
# The hd44780 hardware index (0..7) to store the glyph at. If
# multiple distinct images use the same slot then make sure to only
# use one of those images in any given screen. This parameter is
# required if hd44780_data is specified.
# If a primary [display] section has been defined in printer.cfg as shown
# above it is possible to define multiple auxilary displays. Note that