adc.asm

LCD和44键盘的一个简单例子,proteus下仿真通过

HIGHB EQU 31H
LOWGB EQU 32H
ORG 0000H
AJMP MAIN
ORG 0003H
AJMP INT0
ORG 0030H
MAIN:
MOV SP,#5FH
MOV R0,#30H
SETB IT0
SETB EA
SETB EX1
MOV DPTR,#0FFF8H
MOVX @DPTR,A
LOOP:
CALL HEXTBCD
CALL SHOW
AJMP LOOP
INT0:
PUSH ACC
PUSH PSW
MOVX A,@DPTR
MOV @R0,A
MOV DPTR,#0FFF8H
MOVX @DPTR ,A
POP PSW
POP ACC
RETI
HEXTBCD:
MOV A,@R0
MOV B,#5
MUL AB
MOV HIGHB,B
MOV LOWGB,A