Basic Micro Studio Syntax Manual

LCDINIT
Syntax
lcdinit RS\ E\ D7\ D6\ D5\ D4 {,RW}
Commands
• RS - is any expression, constant or variable that specifi es the I/O pin connected to the LCD’s
R/S pin.
• E - is any expression, constant or variable that specifi es an I/O pin connected to the LCD’s
enable pin.
• D7 - is any expression, constant or variable that specifi es an I/O pin connected to the LCD’s
data bit 7 pin.
• D6 - is any expression, constant or variable that specifi es an I/O pin connected to the LCD’s
data bit 6 pin.
• D5 - is any expression, constant or variable that specifi es an I/O pin connected to the LCD’s
data bit 5 pin.
• D4 - is any expression, constant or variable that specifi es an I/O pin connected to the LCD’s
data bit 4 pin.
• RW - is any expression, constant or variable that specifi es an I/O pin connected to the LCD’s
read or write enable pin.
Supported
• BA - Supported
• BAN - Supported
• BAP - Supported
• BAP40 - Supported
Description
There are 3 LCD commands available in MBasic and are used to interface to a Hitachi HD44780
controller based LCD. This is probably one of the most common LCDs available. 1x16 all the way
up to 4x40 size screens are supported. The HD44780 controller does require special initialization
commands so the LCDINIT command was added to handle this automatically. The LCDINIT
command is only needed once in a program, typically to the beginning of a program. The LCD does
require some time to power up before running the LCDINIT command. A short pause placed before
the LCDINIT command will handle any power up issues. Otherwise the LCDINIT command can be
run later in a program to provide the same power up time.
136