; ********************************************
; Function : LCD字符显示+KEY按键处理示例程序 *
; MICroProcessor : HT48R50A-1/28SKDIP-A *
; Author: www.picavr.com *
; Crystal : 4MHz *
; ********************************************
#INCLUDE HT48R50A-1.INC
LCD_DATA EQU PC
LCD_DATA_CTRL EQU PCC
LCD_CTRL EQU PB
LCD_CTRL_CTRL EQU PBC
E EQU 1
RS EQU 0
;------------------------------------------------------------
DATA .SECTION AT 60H ’DATA’
DELAY_COUNTER_1 DB ? ;[60H]
DELAY_COUNTER_2 DB ? ;[61H]
DELAY_COUNTER_3 DB ? ;[62H]
DATA DB ? ;[63H]
COUNTER DB ? ;[64H]
;------------------------------------------------------------
CODE .SECTION AT 00H ’CODE’
ORG 00H
JMP START
ORG 0CH
JMP TIMER1
ORG 20H
START:
MOV A,01111111B
MOV PAC,A
CALL LCD_RESET
MOV A,OFFSET LCD_MESSAGE_1
MOV TBLP,A
CALL LCD_DISPLAY
MOV A,09H
MOV INTC,A
MOV A,80H
MOV TMR1C,A
FIRST_TIME:
MOV A,PA
AND A,00010000B
SUB A,00010000B
SZ ACC
JMP FIRST_TIME
PRESS_ANY_KEY:
MOV A,OFFSET LCD_MESSAGE_2
MOV TBLP,A
CALL LCD_DISPLAY
ANY_KEY:
MOV A,PA
AND A,00010000B
SUB A,00010000B
SZ ACC
JMP ANY_KEY
MOV A,PA
AND A,00001111B
MOV DATA,A
SUB A,09H
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