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ORG 0100H
P5 EQU 0F8H
P7 EQU 0DBH
//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
ROWc MACRO val
local NEXT
MOV A, val
MOV R1, A
MOV P5, A
MOV A, P7
CPL A
JZ NEXT
CPL A
ANL A, R1
MOV DPH, #80H
MOV DPL, A
MOVX A, @DPTR
MOV R3, A
LCDcharWR
MOV A, R3
CPL A
MOV P1, A
DELAY #0FFH
NEXT:
ENDM
DELAY MACRO val
LOCAL TAM, TU
MOV R6, val //OPOZNIENIE
TAM:
MOV R5, val
TU:
DJNZ R5,TU
DJNZ R6,TAM
ENDM
LOAD MACRO adr, val
MOV DPH, #80H
MOV DPL, adr
MOV A, val
MOVX @DPTR, A
ENDM
START:
LOAD #01110111B, #31H
LOAD #01111011B, #32H
LOAD #01111101B, #33H
LOAD #01111110B, #41H
LOAD #10110111B, #34H
LOAD #10111011B, #35H
LOAD #10111101B, #36H
LOAD #10111110B, #42H
LOAD #11010111B, #37H
LOAD #11011011B, #38H
LOAD #11011101B, #39H
LOAD #11011110B, #43H
LOAD #11100111B, #2AH
LOAD #11101011B, #30H
LOAD #11101101B, #23H
LOAD #11101110B, #44H
init_LCD
READ:
ROWc #7FH
ROWc #0BFH
ROWc #0DFH
ROWc #0EFH
JMP READ
NOP
NOP
NOP
JMP $
END START
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