ad574.txt

有用的单片机程序,包括8279和E2ROM的读写

ORG 0000H
SJMP START
ORG 0003H
LJMP INT00
ORG 000BH
RETI
ORG 0013H
RETI
ORG 001BH
RETI
ORG 0023H
RETI

START:MOV SP,#60H
     MOV  R0,#40H
     MOV  R1,#50H
     MOV  R6,#00H
     MOV  R7,#00H
     MOV  R3,#00H
     SETB IT0
     SETB EA
     SETB EX0
    
    
LOOP:MOV  DPTR,#7FFFH
     MOVX @DPTR,A
     CLR  P1.0
     CLR  P1.1
     CJNE R3,#0FFH,$
     MOV  R3,#00H
     
     SJMP LOOP
     
INT00:MOV P1,#01H
     MOV DPTR,#7FFFH
     MOVX A,@DPTR
     MOV @R0,A
     MOV R6,A
     NOP
     MOV P1,#11H
     MOV DPTR,#7FFFH
     MOVX A,@DPTR
     MOV @R1,A
     MOV R7,A
     NOP
     
     MOV R3,#0FFH
     RETI
     
LOOP1: NOP
       END