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LJMP START
ORG 0100H
//rejestry sterujace lcd
LCDstatus equ 0FF2EH //status wyświetlacza
LCDcontrol equ 0FF2CH //sterowanie wyswietlaczem
LCDdataWR equ 0FF2DH //wypisywanie
LCDdataRD equ 0FF2FH //czytanie
#define HOME 0x80 //powrot na poczatek linii
#define INITDISP 0x38 //inicjalizacja lcd
#define HOM2 0xc0 //kursor do drugiej linii
#define LCDON 0x0e //wlaczenie lcd z
#define CLEAR 0x01 //wyczyszczenie wyswietlacza
LCDcntrlWR MACRO x
LOCAL loop
loop:
MOV DPTR, #LCDstatus
MOVX A,@DPTR
JB ACC.7,loop ;check if LCD is busy
MOV DPTR,#LCDcontrol;write to LCD control
MOV A,x
MOVX @DPTR,A
ENDM
LCDcharWR MACRO
LOCAL loop1,loop2
PUSH ACC
loop1:
MOV DPTR,#LCDstatus
MOVX A,@DPTR
JB ACC.7,loop1 ;check if LCD busy
loop2:
MOV DPTR,#LCDdataWR
POP ACC
MOVX @DPTR,A
ENDM
init_LCD MACRO
LCDcntrlWR #INITDISP
LCDcntrlWR #CLEAR
LCDcntrlWR #LCDON
ENDM
START:
init_LCD
MOV A, #59H
LCDcharWR
MOV A, #6FH
LCDcharWR
MOV A, #75H
LCDcharWR
MOV A, #20H
LCDcharWR
MOV A, #43H
LCDcharWR
MOV A, #61H
LCDcharWR
MOV A, #6EH
LCDcharWR
LCDcntrlWR #HOM2
MOV A, #44H
LCDcharWR
MOV A, #6FH
LCDcharWR
MOV A, #20H
LCDcharWR
MOV A, #49H
LCDcharWR
MOV A, #74H
LCDcharWR
NOP
NOP
NOP
JMP $
END START
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