VTech Alphabert s Magic Readport User Manual download pdf (Page 35)

BM Dept., Govt. Engg. College, Gandhinagar Page 35

between two data which gives enough time to LCD for its operation and does not require

to check the status whether it is busy or not.

Program:

; For Kit prepared for LAB

; Program to Display text message on LCD

; Port 1 Drives data lines, P2.1-RS, P2.0 EN,RW is grounded

RS EQU P2.1

RW EQU P2.1

EN EQU P2.0

DATA equ P0

org 00h

MOV P0,#00h ; Port P0 output port

MOV P2,#00h ; Port P2 output port

MOV A,#38h ;Initialize LCD, 2 lines, 5X7 matrix

acall command ;Issue command to the LCD

MOV A,#0eh

acall command ;LCD ON, Cursor ON

MOV A,#01h

acall command ;Clear LCD

MOV A,#06h

acall command ;Shift cursor right

MOV A,#80h

acall command ;Force cursor at beginning of the first line

MOV DPTR,#msg ;Point to text message

acall disp_msg ;Display message on second line

here: sjmp here

command:

acall delay ;Write when display not busy

clr RS ;Select command register

clr RW

mov DATA,A

setb EN ;Set Enable terminal of LCD

nop

clr EN

ret

disp_data:

acall delay

mov DATA,a ;Get data for display

clr RW

setb RS ;Select data register

setb EN ;Enable LCD (Strobe LCD)

nop

clr EN ;Clear Enable and latch data

ret

disp_msg:

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 79 80

Comments to this Manuals

No comments

VTech Alphabert s Magic Readport User Manual Page 35

Comments to this Manuals

Related products and manuals for Toys & accessories VTech Alphabert s Magic Readport