51单片机简单程序汇集.doc

流水灯程序;使用杜邦线连接P1与LED端口J9ORG 00HSTART:MOV A,#0FFH ;赋初值 CLR C MOV R2,#8 LOOP1:RRC A ; 带进位右移 MOV P1,A CALL DELAY DJNZ R2,LOOP1 MOV R2,#7 LOOP2:RLC A ; 带进位左移 MOV P1,A CALL DELAY DJNZ R2,LOOP2 JMP START DELAY:MOV R3,#20 ; 延时0.2秒D1: MOV R4,#20D2: MOV R5,#248 DJNZ R5,$ DJNZ R4,D2 DJNZ R3,D1 RET END查表法流水灯;使用杜邦线连接P1与LED端口J9 ORG 00HSTART: MOV DPTR,#TABLE ; 将表的地址存入数据指针LOOP: CLR A MOVC A,A+DPTR ;到数据指针所指的地址取码 CJNE A,#01,LOOP1 ; 取出的码是否01H？否则跳到LOOP1 JMP STARTLOOP1: MOV P1,A ;取出的值输出到P1端口 MOV R3,#20 ;用于改变延时长度 CALL DELAY INC DPTR JMP LOOPDELAY: MOV R4,#20D1: MOV R5,#248 DJNZ R5,$ DJNZ R4,D1 DJNZ R3,DELAY RETTABLE: DB 0FEH,0FDH,0FBH,0F7H ;左移 DB 0EFH,0DFH,0BFH,7FH DB 0FEH,0FDH,0FBH,0F7H ;左移 DB 0EFH,0DFH,0BFH,7FH DB 7FH,0BFH,0DFH,0EFH ;右移 DB 0F7H,0FBH,0FDH,0FEH DB 7FH,0BFH,0DFH,0EFH ;右移 DB 0F7H,0FBH,0FDH,0FEH DB 00H,0FFH,00H,0FFH ;闪烁 DB 01H ;结束码 END动态扫描两位数码管;利用中断的99秒计时器 ，动态扫描两位数码管;P0口接J3，数据端口;P2.2接 J2 B端子，表示段码锁存;P2.3接 J2 A端子，标志位码锁存LATCH1 BIT P2.2LATCH2 BIT P2.3ORG 00HJMP STARTORG 0BHJMP TIM0START:MOV R3,#00 ;中断循环次数 MOV R4,#0 ;时间初值 MOV DPTR,#TABLE MOV SP,#40H MOV TMOD,#01H ;定时器工作方式 MOV TH0,#HIGH(65536-3800) MOV TL0,#LOW(65536-3800) ;初值4MS SETB TR0 MOV IE,#82H ;开中断TIM0: MOV TH0,#HIGH(65536-3800) MOV TL0,#LOW(65536-3800) INC R3 CJNE R3,#250,X1 ;1S MOV R3,#0 MOV A,R4 ;十进制转换 MOV B,#10 DIV AB MOV 20H,B ; 个位 MOV 21H,A ; 十位 INC R4 CJNE R4,#100,LEDSCAN ;到100则清零 MOV R4,#0LEDSCAN: CALL SCAN ;调用数码管扫描X1: PUSH ACC PUSH PSW CALL SCAN POP PSW POP ACC RETISCAN: MOV A,21H MOVC A,A+DPTR MOV P0,A SETB LATCH1 CLR LATCH1 MOV P0,#11111110B ;扫描子程序 SETB LATCH2 CLR LATCH2 CALL DELAY1 MOV A,20H MOVC A,A+DPTR MOV P0,A SETB LATCH1 CLR LATCH1 MOV P0,#11111101B ;0代表选通该位数码管 SETB LATCH2 CLR LATCH2 CALL DELAY1 RETDELAY:MOV R5,#50 ;典型延时程序D1: MOV R6,#40D2: MOV R7,#248 CALL SCAN DJNZ R7,$ DJNZ R6,D2 DJNZ R5,D1 RETDELAY1:MOV R6,#4 ;扫描延时D3: MOV R7,#248 DJNZ R7,$ DJNZ R6,D3 RETTABLE:DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH ;共阴字码表END倒计时演示1;P0口接J3，数据端口;P2.2接 J2 B端子，表示段码锁存;P2.3接 J2 A端子，标志位码锁存; 这是一个9999 4位数倒计时，为了方便观察，定时时间稍短。LD1BITP2.7LD2BITP2.6LD3BITP2.5LD4BITP2.4LED1BITP2.3LED2BITP2.2LED3BITP2.1LED4BITP2.0BEEPBITP3.6 LATCH1 BIT P2.2 LATCH2 BIT P2.3SUBBIT01H;减位标志位BUF_LED1EQU24H;LED1缓存BUF_LED2EQU25H;LED2缓存BUF_LED3EQU26H;LED3缓存BUF_LED4EQU27H;LED4缓存BIN_LED1EQU28HBIN_LED2EQU29HBIN_LED3EQU2AHBIN_LED4EQU2BHBUFF_LPEQU2CHORG0000HLJMPMAINORG00BHLJMPTT0ORG0100HMAIN:MOVSP,#40HMOVA,#00HMOVIE,#00HMOVR6,#50HMOVR0,#20HSTR0:MOVR0,AINCR0NOPDJNZR6,STR0MOVP1,#0FFHMOVP0,#0FFHMOVP2,#80HMOVP3,#0FFHMOVBUFF_LP,#00HMOVTH0,#0FCH;LED扫描周期1MSMOVTL0,#18HMOVTMOD,#01Hmovbuf_led1,#6Fhmovbuf_led2,#6Fhmovbuf_led3,#6Fhmovbuf_led4,#6FhMOVBIN_LED1,#09HMOVBIN_LED2,#09HMOVBIN_LED3,#09HMOVBIN_LED4,#09HSETBEA;1MSSETBET0SETBTR0WAIT: JB SUB,SUB_L1 LJMP WAITSUB_L1: MOV A,BIN_LED1CLRSUBCJNEA,#00H,SUB_EN MOVBIN_LED1,#09LJMPSUB_LED2SUB_EN: DECBIN_LED1 MOVA,BIN_LED1 MOVDPTR,#LED_CODE MOVCA,A+DPTR MOVBUF_LED1,ASUB_EN1: LJMPWAITSUB_LED2: MOVBUF_LED1,#6FH MOVA,BIN_LED2 CJNEA,#00H,SUB_EN2 MOVBIN_LED2,#09 LJMPSUB_LED3SUB_EN2: DECBIN_LED2 MOVA,BIN_LED2 MOVDPTR,#LED_CODE MOVCA,A+DPTR MOVBUF_LED2,A LJMPWAITSUB_LED3: MOVBUF_LED2,#6FH MOVA,BIN_LED3 CJNEA,#00H,SUB_EN3 MOVBIN_LED3,#09 LJMPSUB_LED4SUB_EN3: DECBIN_LED3 MOVA,BIN_LED3 MOVDPTR,#LED_CODE MOVCA,A+DPTR MOVBUF_LED3,A LJMPWAITSUB_LED4: MOVBUF_LED3,#6FH MOVA,BIN_LED4 CJNEA,#00H,SUB_EN4 LJMPSUB_LED5SUB_EN4: DECBIN_LED4 MOVA,BIN_LED4 MOVDPTR,#LED_CODE MOVCA,A+DPTR MOVBUF_LED4,A LJMPWAITSUB_LED5:LJMP MAIN;定时器0，扫描数码管TT0:MOVTH0,#0FCHMOVTL0,#18HPUSHACCPUSHPSWINCBUFF_LPMOVA,BUFF_LPCJNEA,#04H,TT0_01MOVBUFF_LP,#00HTT0_01: MOVA,BUFF_LPRLAMOVDPTR,#LED_LOOPJMPA+DPTRLED_LOOP:AJMPLED_L1AJMPLED_L2AJMPLED_L3AJMPLED_L4LED_L1: MOV P0,#11111110B SETB LATCH2 CLR LATCH2MOVP0,BUF_LED4 SETB LATCH1 CLR LATCH1JMPTT0_ENDLED_L2: MOV P0,#11111101B SETB LATCH2 CLR LATCH2MOVP0,BUF_LED3 SETB LATCH1 CLR LATCH1JMPTT0_ENDLED_L3: MOV P0,#11111011B SETB LATCH2 CLR LATCH2MOVP0,BUF_LED2 SETB LATCH1 CLR LATCH1JMPTT0_ENDLED_L4: MOV P0,#11110111B SETB LATCH2 CLR LATCH2MOVP0,BUF_LED1 SETB LATCH1 CLR LATCH1JMPTT0_ENDTT0_END:INCR2CJNER2,#100,TT0_END1MOVR2,#00HSETBSUBTT0_END1:POPPSWPOP ACCRETINOPNOPLJMP000HDELAY:MOV R5,#0D1: MOV R6,#20D2: MOV R7,#248 DJNZ R7,$ DJNZ R6,D2 DJNZ R5,D1 RETLED_CODE: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FHEND倒计时演示2;P0口接J3，数据端口;P2.2接 J2 B端子，表示段码锁存;P2.3接 J2 A端子，标志位码锁存 LATCH1 BIT P2.2 LATCH2 BIT P2.3ORG 00HJMP STARTORG 0BHJMP TIM0START:MOV R3,#00 MOV R4,#100 MOV DPTR,#TABLE MOV SP,#40H MOV TMOD,#01H MOV TH0,#HIGH(65536-3800) MOV TL0,#LOW(65536-3800) ;初值4Ms SETB TR0 MOV IE,#82HTIM0: MOV TH0,#HIGH(65536-3800) MOV TL0,#LOW(65536-3800) INC R3 CJNE R3,#250,X1 MOV R3,#00 DEC R4 MOV A,R4 MOV B,#10 DIV AB MOV 20H,B ; 个位 MOV 21H,A ; 十位 CJNE R4,#00,DD1 MOV R4,#100 DD1: CALL SCANX1: PUSH ACC PUSH PSW CALL SCAN POP PSW POP ACC RETISCAN:MOV P0,#11111110B ;扫描子程序 SETB LATCH2 CLR LATCH2 MOV A,21H MOVC A,A+DPTR MOV P0,A SETB LATCH1 CLR LATCH1 CALL DELAY1 MOV P0,#11111101B SETB LATCH2 CLR LATCH2 MOV A,20H MOVC A,A+DPTR