linux-stable/Documentation/admin-guide/lcd-panel-cgram.rst
Mauro Carvalho Chehab 4f4cfa6c56 docs: admin-guide: add a series of orphaned documents
There are lots of documents that belong to the admin-guide but
are on random places (most under Documentation root dir).

Move them to the admin guide.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2019-07-15 11:03:02 -03:00

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Parallel port LCD/Keypad Panel support
======================================
Some LCDs allow you to define up to 8 characters, mapped to ASCII
characters 0 to 7. The escape code to define a new character is
'\e[LG' followed by one digit from 0 to 7, representing the character
number, and up to 8 couples of hex digits terminated by a semi-colon
(';'). Each couple of digits represents a line, with 1-bits for each
illuminated pixel with LSB on the right. Lines are numbered from the
top of the character to the bottom. On a 5x7 matrix, only the 5 lower
bits of the 7 first bytes are used for each character. If the string
is incomplete, only complete lines will be redefined. Here are some
examples::
printf "\e[LG0010101050D1F0C04;" => 0 = [enter]
printf "\e[LG1040E1F0000000000;" => 1 = [up]
printf "\e[LG2000000001F0E0400;" => 2 = [down]
printf "\e[LG3040E1F001F0E0400;" => 3 = [up-down]
printf "\e[LG40002060E1E0E0602;" => 4 = [left]
printf "\e[LG500080C0E0F0E0C08;" => 5 = [right]
printf "\e[LG60016051516141400;" => 6 = "IP"
printf "\e[LG00103071F1F070301;" => big speaker
printf "\e[LG00002061E1E060200;" => small speaker
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