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LCD(4) Device Drivers Manual (luna88k) LCD(4)

lcdfront panel LCD display

lcd0 at mainbus0

The lcd driver provides access to the front panel LCD display on LUNA88K. 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:

Clear the LCD screen, restore display area from shift and move the cursor to upper-left position.
Restore display area from shift and move the cursor to upper-left position.
int *
Specify cursor advance direction and display shift mode.
int *
Control display on/off, cursor on/off, and cursor blinking on/off.
int *
Move the cursor or shift the display area.
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.
Restore boot-time LCD message.

These ioctl parameters are defined in ⟨machine/lcd.h⟩.

/dev/lcd
 

ioctl(2)

The lcd driver first appeared in OpenBSD 4.1.

May 31, 2007 OpenBSD-5.5