51单片机常见汇编程序实验代码.docx

1、51单片机常见汇编程序实验代码51单片机常见汇编程序实验代码1. 将片外8000H-80FFH单元写入数据ABORG 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MAIN: MOV SP,#60H; 避免堆栈和工作寄存器区冲突 MOV DPTR,#8000H MOV R0,#0LOOP: 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X:8000H)2. 将片内RAM20H单元中数据在数码管上显示

2、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 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 CHAILOOP: MOV R0,#10H ;第一个显示数的送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

3、 ;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 RETP164: MOV DPTR,#TAB MOVC A,A+DPTRP164_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

4、,R3 DJNZ 0FH,P164_1 MOV 0FH,#8 RETPBIT: MOV DPTR,#0E101H MOV A,R2 MOVX DPTR,A RL A MOV R2,A RETDELAY: MOV R6,#4DEL: MOV R7,#250 DJNZ R7,$ DJNZ R6,DEL RETTAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH END3. 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

5、程序 ORG 0030H ;以免覆盖中断MAIN: MOV SP,#60H ;避免堆栈和工作寄存器区冲突 MOV R0,#30H MOV A,#0LOOP: MOV R0,A INC R0 CJNE R0,#41H,LOOP ;判断 AJMP $ ;等待 END ;D:30H4. 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 MOV A,#03H ;PA、PB口输出 MOVX DPTR,

6、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 LOOPDISPLAY: MOV A,R0 MOV 0FH,#8 ACALL P164 ACALL PBIT ACALL DELAY MOV A,#0 MOVX DPTR,A INC R0 DJNZ R1,DISPLAY RETP1

7、64: MOV DPTR,#TAB MOVC A,A+DPTRP164_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 RETPBIT: MOV DPTR,#0E101H MOV A,R2 MOVX DPTR,A RL A MOV R2,A RETDELAY: MOV R6,#4DEL: MOV R7,#250 DJNZ R7,$ DJNZ R6,DEL RETTAB: DB 0FC

8、H,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH END5. 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,#1LOOP01: MOV R5,#5AH ACALL DENG MOV R

9、1,#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,#3LOOP03: MOV R5, #0F5H ACALL DENG MOV R1,#10 ACALL DELAY MOV R5,#0A0H AC

10、ALL DENG MOV R1,#10 ACALL DELAY DJNZ R0,LOOP03 AJMP LOOP01DENG: 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,#200DEL: MOV R6,#229 DJNZ R6,$ DJNZ R7,DEL DJNZ R1,DELAY RET END6. 将交通灯点亮 ORG 0000H AJMP START ORG 0030HSTART: MOV DPTR,#0AC03H MOV A,#80H M

11、OVX DPTR,A MOV DPTR,#0AC00H MOV A,#05AH MOVX DPTR,A AJMP $ END7. AD转换实验 ORG 0000 AJMP START ORG 000BH AJMP INT_0 ORG 0030HSTART: 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,#0L

12、OOP: MOV R0,#20H MOV R1,#6 MOV R2,#1 ACALL DISPLAY SJMP LOOPINT_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 ACCEXIT: RETIDISPLAY: MOV A,R0 MOV 0FH,#8 ACALL P164 ACAL

13、L PBIT ACALL DELAY MOV A,#0 MOVX DPTR,A INC R0 DJNZ R1,DISPLAY RETP164: MOV DPTR,#TAB MOVC A,A+DPTRP164_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 RETPBIT: MOV DPTR,#0E101H MOV A,R2 MOVX DPTR,A RL A MOV R2,A RETD

14、ELAY: MOV R6,#4DEL: MOV R7,#250 DJNZ R7,$ DJNZ R6,DEL RETTAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH END8. DA转换实验 ORG 0000 SJMP START ORG 0030HSTART: MOV SP,#60H MOV A,#0 LOOP1: MOV DPTR,#0B000H MOVX DPTR,A ACALL XS ACALL DELAY INC A CJNE A,#0FFH,LOOP1LOOP2: M

15、OV 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 RETS164: RRC A MO

16、V P1.0,C CLR P1.1 SETB P1.1 DJNZ R4,S164 RETDELAY: MOV R7,#200DEl: MOV R6,#229 DJNZ R6,$ DJNZ R7,DEL RETTAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH END9. 定时器的应用 ORG 0000H AJMP START ORG 00BH AJMP INT_0 ORG 0030HSTART: MOV TMOD,#01H MOV TH0,#4BH MOV TL0,#0FDH M

17、OV 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,#0EXIT: RETITAB: DB 0FFH,0FAH,0F5H,0AFH,05FH,0AAH,55H,0H,0FFH END10. 开关控制LED的亮灭及速度 ORG 0000H ;程序从0000H开始执行 AJMP ST

18、ART ;跳转到主程序 ORG 0030H ;以免覆盖中断 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1LOOP2: 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,#200DEL: MOV R7,#229

19、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_1START: 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;

20、MOV R1,#4 MOV R2,#1 LCALL DISPLAY SJMP LOOPINT_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: RETIDISPLAY: MOV A,R0 MOV 0FH,#8 ACALL P164 ACA

21、LL PBIT ACALL DELAY MOV A,#0 MOVX DPTR,A INC R0 DJNZ R1,DISPLAY RETP164: MOV DPTR,#TAB MOVC A,A+DPTRP164_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 RETPBIT: MOV DPTR,#0E101H MOV A,R2 MOVX DPTR,A RL A MOV R2,A RET

22、DELAY: MOV R6,#4DEL: MOV R7,#250 DJNZ R7,$ DJNZ R6,DEL RETTAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EH END12. 串并转换实验 ORG 0000 SJMP START ORG 0030HSTART: 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

23、,#8 ACALL S164 INC R1 MOV R5,#10 ACALL DELAY CJNE R1,#10,EXIT MOV R1,#0EXIT: SJMP LOOPS164: RRC A MOV P1.0,C CLR P1.1 SETB P1.1 DJNZ R4,S164 RETDELAY: MOV R6,#200DEL: MOV R7,#230 DJNZ R7,$ DJNZ R6,DEL DJNZ R5,DELAY RETTAB: DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H, 0FEH,0F6H END13. 直流电机速度检测 ORG 0000H

24、 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,#00HUP: 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,UPDOWN:MOV A,

25、R2 MOV DPTR,#0A000H MOVX DPTR,A MOV R5,#1 ACALL DELAY ;100ms DEC R2 CJNE R2,#00H,DOWN AJMP UPINT_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 ACCEXIT: RETIXS: MOV DPTR,#TAB ;MOV A,R2 M

26、OV 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 RETFS: MOV R1,#8 YW:RRC A MOV P1.0,C CLR P1.1 SETB P1.1 DJNZ R1,YW RETDELAY:MOV R6,#200 DEL:MOV R7,#230 DJNZ R7,$ DJNZ R6,DEL DJNZ R5,DELAY RETTAB:DB 0FCH,60H,0DAH,0F2H,66H,0B6H,0BEH,0E0H DB 0FEH,0F6H,0EEH,3EH,9CH,7AH,9EH,8EHEND14. 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 0030HSTART: MOV DPTR,#0AC03H MOV A, #82H MOVX DPTR, A MOV DPTR,#0E100H MOV A,#3