微机原理实验,实验四程序
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方波发生
ORG 0000H
START:CPL P1.0
MOV R2,#25
LCALL DELAY
SJMP START; DELAY:PUSH 02H
LP1: PUSH 02H
LP2: PUSH 02H
LP3: DJNZ R2,LP3
POP 02H
DJNZ R2,LP2
POP 02H
DJNZ R2,LP1
POP 02H
DJNZ R2,DELAY
RET
END P1口输出
ORG 0000H
LJMP LOOP
ORG 0030H
LOOP: MOV A,#0FH
MOV P1,A
MOV A,P1
ORL A,#0F0H
SWAP A
MOV P1,A
SJMP LOOP
END
P1口输出3
ORG 0000H
LJMP LOOP
ORG 0030H
LOOP: MOV A,#0FH
MOV P1,A
MOV A,P1
ORL A,#0F0H
CJNE
A,#0FFH,NEXT
MOV A,#10H
LOOP1:MOV P1,A
RL A
MOV R2,#25H
LCALL DELAY
CJNE
A ,#01H,LOOP1
SJMP LOOP
NEXT: MOV P1,#0FFH
SJMP LOOP
DELAY: PUSH 02H
LP1: PUSH 02H
LP2: PUSH 02H
LP3: DJNZ R2,LP3
POP 02H
DJNZ R2,LP2
POP 02H
DJNZ R2,LP1
POP 02H
DJNZ R2,DELAY
RET
END
外部中断（1）p1
ORG 0000H
SRART:LJMP MAIN;
ORG 0003H
INT0: LJMP INT0S;
ORG 0030H
MAIN:MOV P1,#0FFH
SETB PX0
SETB IT0
SETB EX0
SETB EA
REP:SJMP REP;
INT0S:MOV A,P1
SWAP A
CPL A
ORL A,#0FH
MOV P1,A
RETI
END
外部中断（1）循环左移
ORG 0000H
SRART: LJMP MAIN;
ORG 0003H
INT0: LJMP INT0S;
ORG 0030H
MAIN: MOV P1,#0FFH
SETB PX0
SETB IT0
SETB EX0
SETB EA
MOV A,#10H
REP: SJMP REP
INT0S: MOV P1,A
MOV R2,#25H
LCALL DELAY
RL A
CJNE A,#01H,INT0S
MOV A,#10H
SJMP INT0S
RETI
DELAY:PUSH 02H
LP1: PUSH 02H
LP2: PUSH 02H
LP3: DJNZ R2,LP3
POP 02H
DJNZ R2,LP2
POP 02H
DJNZ R2,LP1
POP 02H
DJNZ R2,DELAY
RET
END
外部中断（1）奇数偶数ORG 0000H
MOV R3,#00H SRART:LJMP MAIN; ORG 0030H
INT0:MOV A,R3
MOV B,#02
DIV AB
JNB B,INT01
MOV A,#10H
LJMP INT02;
ORG 0040H MAIN:MOV P1,#0FFH
SETB PX0
SETB IT0
SETB EX0
SETB EA
INC R3
REP: SJMP REP; INT01:MOV A,P1
SWAP A
ORL A,#0FH
MOV P1,A
RETI INT02:MOV P1,A
MOV R2,#25H
LCALL DELAY
RL A
CJNE A,#01H,INT02
MOV A,#10H
RETI
SJMP MAIN
DELAY: PUSH 02H
LP1: PUSH 02H
LP2: PUSH 02H
LP3: DJNZ R2,LP3
POP 02H
DJNZ R2,LP2
POP 02H
DJNZ R2,LP1
POP 02H
DJNZ R2,DELAY
RET
END
外部中断（2）
ZWMADDR EQU 8002H;
ZXMADDR EQU 8004H;
ORG 0000H
LJMP START;
ORG 0003H
INT0: LJMP INT0S
START: SETB PX0
SETB IT0
SETB EX0
SETB EA
MOV A,#7FH
MOV DPTR,#ZXMADDR
MOVX @DPTR,A
MOV A,#01H
LOOP:
MOV DPTR,#ZWMADDR
MOVX @DPTR,A
LJMP LOOP
INT0S: RL A
CJNE A,#40H,BYE
MOV A,#01H
BYE: R ETI
END
外部中断（2)0~F
ZWMADDR EQU 8002H;
ZXMADDR EQU 8004H;
ORG 0000H
LJMP START;
ORG 0003H
INT0: LJMP INT0S
START: SETB PX0
SETB IT0
SETB EX0
SETB EA
MOV R3,#20H
MOV R4,#00H
LOOP:
MOV DPTR,#CHAR
MOV A,R4
MOVC A,@A+DPTR
MOV DPTR,#ZXMADDR
MOVX @DPTR,A
MOV A,R3
MOV DPTR,#ZWMADDR
MOVX @DPTR,A
LJMP LOOP
INT0S: MOV A,R3
RR A
MOV R3,A
INC R4
CJNE R3,#80H,BYE
MOV R3,#20H
BYE: R ETI
CHAR:DB
3FH,06H,5BH,4FH,66H,6DH,7D
H,07H
DB
7FH,6FH,77H,7CH,39H,5EH,79
H,71H
END