51单片机常见汇编程序实验代码.doc

1. 将片外8000H-80FFH单元写入数据AB 1
2. 将片内RAM20H单元中数据在数码管上显示出来 1
3. 将片内ARM30H-40H单元清零 2
4. 将六位数显示在数码管上 2
5. 8255并口芯片的应用：交通灯控制系统的设计 3
6. 将交通灯点亮 3
7. AD转换实验 4
8. DA转换实验 5
9. 定时器的应用 5
10. 开关控制LED的亮灭及速度 6
11. 计数器实验 6
12. 串并转换实验 7
13. 直流电机速度检测 7
14. 8255PB外接8个开关，编程将开关状态显示在数码管上（串并转换动态扫描方式） 8
15. P3.4接开关K，编程将开关拨动次数，通过串并转换的方式进行显示 9
16. 比较片内RAM30H、31H两个单元值的大小，将较大的数显示在数码管上 10
17. 单片机P1口接8个开关，编程将开关状态显示在数码管上（串并转换动态扫描方式） 10
18. 将片内50H单元的值显示在数码管上 11
19. 开关K1接P1.0，K2接P1.1，编程实现当按下K1时在数码管上显示50H单元的值，按下K2在数码管上显示51H单元的值 12

1. 将片外8000H-80FFH单元写入数据AB
ORG 0000H ;程序从0000H开始执行
AJMP MAIN ;跳转到主程序
ORG 0030H ;以免覆盖中断地址
MAIN: MOV SP,#60H; 避免堆栈和工作寄存器区冲突
MOV DPTR,#8000H
MOV R0,#0
LOOP: MOV A,#0ABH
MOVX @DPTR,A
INC DPTR
INC R0
CJNE R0,#0,LOOP ; 判断
AJMP $; 等待
END ;调试-视图-M存储器(输入地址X:8000H)

2. 将片内RAM20H单元中数据在数码管上显示出来
ORG 0000H ;程序从0000H开始执行
AJMP MAIN ;跳转到主程序
ORG 0030H ;以免覆盖中断地址
MAIN: MOV SP,#60H ;避免堆栈和工作寄存器区冲突
MOV DPTR,#0E100H ;指向命令口地址
MOV A,#03H ;PA、PB口输出
MOVX @DPTR,A ;所有并口显示程序先进行8155初始化
MOV 20H,#34H
MOV A,20H
ACALL CHAI
LOOP: MOV R0,#10H ;第一个显示数的地址送R0
MOV R1,#2 ;显示2个数
MOV R2,#1 ;从倒数第一个数码管开始显示
ACALL DISPLAY
LJMP LOOP ;判断
CHAI: MOV B,#10H
DIV AB
MOV 10H,B
MOV 11H,A
RET
DISPLAY: MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A

MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A
ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4
DEL: MOV R7,250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

3. 将片内ARM30H-40H单元清零
ORG 0000H ;程序从0000H开始执行
AJMP MAIN ;跳转到主程序
ORG 0030H ;以免覆盖中断地址
MAIN: MOV SP,#60H ;避免堆栈和工作寄存器区冲突
MOV R0,#30H
MOV A,#0
LOOP: MOV @R0,A
INC R0
CJNE R0,#41H,LOOP ;判断
AJMP $ ;等待
END ;地址D:30H

4. 将六位数显示在数码管上
ORG 0000H ;程序从0000H开始执行
AJMP MAIN ;跳转到主程序
ORG 0030H ;以免覆盖中断地址
MAIN: MOV SP,#60H ;避免堆栈和工作寄存器区冲突
MOV DPTR,#0E100H ;指向命令口地址
MOV A,#03H ;PA、PB口输出
MOVX @DPTR,A ;所有并口显示程序先进行8155初始化
LOOP: MOV R0,#10H ;第一个显示数的地址送R0
MOV 10H,#0H
MOV 11H,#3H
MOV 12H,#1H
MOV 13H,#2H
MOV 14H,#1H
MOV 15H,#1H
MOV R1,#6 ;显示6个数
MOV R2,#1 ;从倒数第一个数码管开始显示
ACALL DISPLAY
LJMP LOOP
DISPLAY: MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A
MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A
ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4
DEL: MOV R7,#250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

5. 8255并口芯片的应用：交通灯控制系统的设计
ORG 0000H
AJMP START
ORG 0030H
START: MOV DPTR,#0AC03H
MOV A,#80H
MOVX @DPTR,A //8155初始化(所有并口显示中都要先8155初始化)
MOV R5,#0F0H
ACALL DENG
MOV R1,#20
ACALL DELAY
MOV R0,#1
LOOP01: MOV R5,#5AH
ACALL DENG
MOV R1,#100
ACALL DELAY
DJNZ R0,LOOP01
MOV R0,#3 // LED_2闪烁次数
LOOP02: MOV R5, #0FAH
ACALL DENG
MOV R1,#10
ACALL DELAY
MOV R5,#50H
ACALL DENG
MOV R1,#10
ACALL DELAY
DJNZ R0,LOOP02
MOV R5,#0A5H
ACALL DENG
MOV R1,#100
ACALL DELAY
MOV R0,#3
LOOP03: MOV R5, #0F5H
ACALL DENG
MOV R1,#10
ACALL DELAY
MOV R5,#0A0H
ACALL DENG
MOV R1,#10
ACALL DELAY
DJNZ R0,LOOP03
AJMP LOOP01
DENG: MOV DPTR,#0AC00H //8155 PA口输出
MOV A,R5
MOVX @DPTR,A //8155 PA口送出显示参数
RET //100ms延时子程序
DELAY: MOV R7,#200
DEL: MOV R6,#229
DJNZ R6,$
DJNZ R7,DEL
DJNZ R1,DELAY
RET
END

6. 将交通灯点亮
ORG 0000H
AJMP START
ORG 0030H
START: MOV DPTR,#0AC03H
MOV A,#80H
MOVX @DPTR,A
MOV DPTR,#0AC00H
MOV A,#05AH
MOVX @DPTR,A
AJMP $
END

7. AD转换实验
ORG 0000
AJMP START
ORG 000BH
AJMP INT_0
ORG 0030H
START: MOV SP,#60H
MOV TMOD,#01H
MOV TH0,#4BH
MOV TL0,#0FDH
MOV R4,#2
SETB EA
SETB ET0
SETB TR0
MOV DPTR,#0E100H
MOV A,#3
MOVX @DPTR,A
MOV 22H,#9
MOV 23H,#0
MOV 24H,#8
MOV 25H,#0
LOOP: MOV R0,#20H
MOV R1,#6
MOV R2,#1
ACALL DISPLAY
SJMP LOOP
INT_0: MOV TH0,#4BH
MOV TL0,#0FDH
DJNZ R4,EXIT
PUSH ACC
PUSH DPH
PUSH DPL
MOV DPTR,#0A000H
MOVX A,@DPTR
MOV B,#10H
DIV AB
MOV 21H,A
MOV 20H,B
MOVX @DPTR,A
MOV R4,#2
POP DPL
POP DPH
POP ACC
EXIT: RETI
DISPLAY: MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A
MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A
ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4
DEL: MOV R7,#250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

8. DA转换实验
ORG 0000
SJMP START
ORG 0030H
START: MOV SP,#60H
MOV A,#0
LOOP1: MOV DPTR,#0B000H
MOVX @DPTR,A
ACALL XS
ACALL DELAY
INC A
CJNE A,#0FFH,LOOP1

LOOP2: MOV DPTR,#0B000H
MOVX @DPTR,A
ACALL XS
ACALL DELAY
DEC A
CJNE A,#0,LOOP2
SJMP LOOP1
XS: PUSH ACC
MOV DPTR,#TAB
MOV B,#51
DIV AB
MOV R1,A
XCH A,B
MOV B,#5
DIV AB
MOVC A,@A+DPTR
MOV R4,#8
ACALL S164
MOV A,R1
MOVC A,@A+DPTR
MOV R4,#8
ACALL S164
MOV A,#0
CLR C
MOV R4,#16
ACALL S164
POP ACC
RET
S164: RRC A
MOV P1.0,C
CLR P1.1
SETB P1.1
DJNZ R4,S164
RET
DELAY: MOV R7,#200
DEl: MOV R6,#229
DJNZ R6,$
DJNZ R7,DEL
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

9. 定时器的应用
ORG 0000H
AJMP START
ORG 00BH
AJMP INT_0
ORG 0030H
START: MOV TMOD,#01H
MOV TH0,#4BH
MOV TL0,#0FDH
MOV R0,#20
MOV R1,#0
SETB ET0
SETB TR0
SETB EA
AJMP $
INT_0: MOV TH0,#4BH
MOV TL0,#0FDH
DJNZ R0,EXIT
MOV R0,20
MOV A,R1
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P1,A
INC R1
CJNE R1,#8,EXIT
MOV R1,#0
EXIT: RETI
TAB: DB 0FFH,0FAH,0F5H,0AFH,05FH,0AAH,55H,0H,0FFH
END

10. 开关控制LED的亮灭及速度
ORG 0000H ;程序从0000H开始执行
AJMP START ;跳转到主程序
ORG 0030H ;以免覆盖中断地址
START: MOV R4,#1 ;立即数传送到累加器
LOOP: CLR P3.3 ;进位标志位清零
LOOP1: JNB P3.5,LOOP ;直接寻址位为0则转移
JB P3.4,LOOP2 ;直接寻址位为1则转移
JNB P3.4,$
INC R4 ;寄存器增1
LOOP2: CPL P3.3 ;累加器求反
MOV A,R4 ;寄存器内容传送到累加器A
MOV R5,A ;累加器内容传送到累加器
ACALL DELAY ;调用延时函数
AJMP LOOP1 ;循环
DELAY: MOV R6,#200
DEL: MOV R7,#229
DJNZ R7,$
DJNZ R6,DEL ;寄存器减1,不为0则转移
DJNZ R5,DELAY
RET ;子程序返回
END

11. 计数器实验
ORG 0000
SJMP START
ORG 001BH
LJMP INT_1
START: MOV SP,#60H
MOV R5,#20
MOV TMOD,#15H
MOV TH1,#4BH
MOV TL1,#0FDH
MOV TH0,#0
MOV TL0,#0
SETB ET1
SETB EA
SETB TR1
SETB TR0
MOV DPTR,#0E100H
MOV A,#3
MOVX @DPTR,A
LOOP: MOV R0,#50H;
MOV R1,#4
MOV R2,#1
LCALL DISPLAY
SJMP LOOP
INT_1: MOV TH1,#4BH
MOV TL1,#0FDH
DJNZ R5,CON
MOV R5,#20
PUSH ACC
PUSH B
MOV A,TL0
MOV B,#10H
DIV AB
MOV 50H,B
MOV 51H,A
MOV A,TH0
MOV B,#10H
DIV AB
MOV 52H,B
MOV 53H,A
MOV TH0,#0
MOV TL0,#0
POP B
POP ACC
CON: RETI
DISPLAY: MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A
MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A
ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4

DEL: MOV R7,#250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

12. 串并转换实验
ORG 0000
SJMP START
ORG 0030H
START: MOV SP,#60H
MOV R1,#0
MOV DPTR,#TAB
LOOP: MOV A,#0
CLR C
MOV R4,#24
ACALL S164
MOV A,R1
MOVC A,@A+DPTR
MOV R4,#8
ACALL S164
INC R1
MOV R5,#10
ACALL DELAY
CJNE R1,#10,EXIT
MOV R1,#0
EXIT: SJMP LOOP
S164: RRC A
MOV P1.0,C
CLR P1.1
SETB P1.1
DJNZ R4,S164
RET
DELAY: MOV R6,#200
DEL: MOV R7,#230
DJNZ R7,$
DJNZ R6,DEL
DJNZ R5,DELAY
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H, 0FEH,0F6H
END

13. 直流电机速度检测
ORG 0000H
AJMP MAIN
ORG 001BH
AJMP INT_1
ORG 0030H
MAIN: MOV SP,#60H
MOV TMOD,#15H
MOV TH1,#4BH
MOV TL1,#0FDH
MOV R0,#20
MOV TH0,#0
MOV TL0,#0
SETB ET1
SETB EA
SETB TR0
SETB TR1
MOV R2,#00H
UP: MOV A,R2
MOV DPTR,#0A000H //注意片选接YC2，非YC3
MOVX @DPTR,A
MOV R5,#1
ACALL DELAY ;100ms
INC R2
CJNE R2,#0FFH,UP
DOWN:MOV A,R2
MOV DPTR,#0A000H
MOVX @DPTR,A
MOV R5,#1
ACALL DELAY ;100ms
DEC R2
CJNE R2,#00H,DOWN
AJMP UP
INT_1: MOV TH1,#4BH
MOV TL1,#0FDH
DJNZ R0,EXIT
MOV R0,#20
PUSH ACC
PUSH DPH
PUSH DPL
MOV A,TL0
ACALL XS
MOV TL0,#0
MOV A,TH0
ACALL XS
MOV TH0,#0
POP DPL
POP DPH
POP ACC
EXIT: RETI
XS: MOV DPTR,#TAB
;MOV A,R2
MOV B,#10 ;显示10进制数
DIV AB
XCH A,B
;MOV DPTR,#TAB
MOVC A,@A+DPTR
ACALL FS
XCH A,B
;MOV DPTR,#TAB
MOVC A,@A+DPTR
ACALL FS
RET
FS: MOV R1,#8
YW:RRC A

MOV P1.0,C
CLR P1.1
SETB P1.1
DJNZ R1,YW
RET
DELAY:MOV R6,#200
DEL:MOV R7,#230
DJNZ R7,$
DJNZ R6,DEL
DJNZ R5,DELAY
RET
TAB:DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

14. 8255PB外接8个开关，编程将开关状态显示在数码管上（串并转换动态扫描方式）
ORG 0000
AJMP START
ORG 0030H
START: MOV DPTR,#0AC03H
MOV A, #82H
MOVX @DPTR, A
MOV DPTR,#0E100H
MOV A,#3
MOVX @DPTR,A
LOOP: MOV DPTR,#0AC01H
MOVX A,@DPTR
MOV B,#10H
DIV AB
MOV 10H,B
MOV 11H,A
MOV R0,#10H
MOV R1,#2
MOV R2,#1
ACALL DISPLAY

SJMP LOOP
DISPLAY:MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A
MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A

ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4
DEL: MOV R7,#250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB:DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

15. P3.4接开关K，编程将开关拨动次数，通过串并转换的方式进行显示
ORG 0000
SJMP START
ORG 0030H
START: MOV SP,#60H
MOV R5,#0
LOOP: JB P3.4,$
ACALL DELAY
JB P3.4,LOOP
INC R5
ACALL XS
LOOP1: JNB P3.4,$
ACALL DELAY
JNB P3.4,LOOP1
INC R5
ACALL XS
SJMP LOOP
DELAY: MOV R7,#200
DEL: MOV R6,#229
DJNZ R6,$
DJNZ R7,DEL
RET
XS: MOV DPTR,#TAB
MOV A,R5
MOV B,#10H
DIV AB
MOV R1,A
MOV A,B
MOVC A,@A+DPTR
MOV R4,#8
ACALL S164
MOV A,R1
MOVC A,@A+DPTR
MOV R4,#8
ACALL S164
MOV A,#0
CLR C
MOV R4,#16
ACALL S164
RET
S164: RRC A
MOV P1.0,C
CLR P1.1
SETB P1.1
DJNZ R4,S164
RET
TAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

16. 比较片内RAM30H、31H两个单元值的大小，将较大的数显示在数码管上
ORG 0000
SJMP START
ORG 0030H
START: MOV SP,#60H
MOV DPTR,#0E100H
MOV A,#3
MOVX @DPTR,A
MOV 30H,#06H ;随便赋两个值，显示较大的
MOV 31H,#11H
MOV A,30H
SUBB A,31H
JC SMALL
MOV B,#10H
MOV A,30H
DIV AB
MOV 30H,B
MOV 31H,A
BIG: MOV R0,#30H
MOV R1,#2
MOV R2,#1
ACALL DISPLAY
SJMP BIG
SMALL: MOV B,#10H
MOV A,31H
DIV AB
MOV 30H,B
MOV 31H,A
SMALL1:MOV R0,#30H
MOV R1,#2
MOV R2,#1
ACALL DISPLAY
SJMP SMALL1
DISPLAY:MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A
MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A
ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4
DEL: MOV R7,#250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB:DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

17. 单片机P1口接8个开关，编程将开关状态显示在数码管上（串并转换动态扫描方式）
ORG 0000H
SJMP START
ORG 0030H
START: MOV SP,#60H
MOV DPTR,#0E100H
MOV A,#3
MOVX @DPTR,A
LOOP: MOV A,P1
MOV B,#10H
DIV AB
MOV 20H,B
MOV 21H,A
MOV R0,#20H
MOV R1,#2
MOV R2,#1
ACALL DISPLAY
AJMP LOOP
DISPLAY:MOV A,@R0
MOV 0FH,#8
ACALL P164
ACALL PBIT
ACALL DELAY
MOV A,#0
MOVX @DPTR,A
INC R0
DJNZ R1,DISPLAY
RET
P164: MOV DPTR,#TAB
MOVC A,@A+DPTR
P164_1: RRC A
MOV R3,A
MOV ACC.0,C
ANL A,#0FDH
MOV DPTR,#0E102H
MOVX @DPTR,A
ORL A,#0FEH
MOVX @DPTR,A
MOV A,R3
DJNZ 0FH,P164_1
MOV 0FH,#8
RET
PBIT: MOV DPTR,#0E101H
MOV A,R2
MOVX @DPTR,A
RL A
MOV R2,A
RET
DELAY: MOV R6,#4
DEL: MOV R7,#250
DJNZ R7,$
DJNZ R6,DEL
RET
TAB:DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H
DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH
END

18. 将片内50H单元的值显示在数码管上
ORG