LCD(4) - Device Drivers Manual (luna88k) #
LCD(4) - Device Drivers Manual (luna88k)
NAME #
lcd - front panel LCD display
SYNOPSIS #
lcd0 at mainbus0
DESCRIPTION #
The lcd driver provides access to the front panel LCD display on LUNA-88K. It is accessed using write(2) to print the characters on the LCD. The device has a physical display area of 16 characters x 2 lines and an internal line buffer of 40 characters x 2 lines.
The following ioctl calls apply to the lcd device:
LCDCLS
Clear the LCD screen, restore display area from shift and move the cursor to upper-left position.
LCDHOME
Restore display area from shift and move the cursor to upper-left position.
LCDMODE
int *
Specify cursor advance direction and display shift mode.
LCDDISP
int *
Control display on/off, cursor on/off, and cursor blinking on/off.
LCDMOVE
int *
Move the cursor or shift the display area.
LCDSEEK
int *
Move the cursor to the specified position. On the first line, the position is specified by a value between 0x00 and 0x27. On the second line, the value is between 0x40 and 0x67.
LCDRESTORE
Restore boot-time LCD message.
These ioctl parameters are defined in <machine/lcd.h>.
FILES #
/dev/lcd
SEE ALSO #
HISTORY #
The lcd driver first appeared in OpenBSD 4.1.
OpenBSD 7.5 - February 15, 2015