This small text file describes the usage of parallel port LCD displays from userspace PoV. So, a good candidate for the admin guide. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx> --- Documentation/auxdisplay/lcd-panel-cgram.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/auxdisplay/lcd-panel-cgram.txt b/Documentation/auxdisplay/lcd-panel-cgram.txt index 7f82c905763d..a3eb00c62f53 100644 --- a/Documentation/auxdisplay/lcd-panel-cgram.txt +++ b/Documentation/auxdisplay/lcd-panel-cgram.txt @@ -1,3 +1,7 @@ +====================================== +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 @@ -7,7 +11,7 @@ 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 : +examples:: printf "\e[LG0010101050D1F0C04;" => 0 = [enter] printf "\e[LG1040E1F0000000000;" => 1 = [up] @@ -21,4 +25,3 @@ examples : printf "\e[LG00002061E1E060200;" => small speaker Willy - -- 2.20.1
