| CODES | |
| OPERATIONS | |
| org 0000h | |
| //add | |
| mov a,#25h | |
| mov b,#12h | |
| add a,b | |
| mov 10h,a | |
| //sub | |
| mov a,#25h | |
| subb a,b | |
| mov 11h,a | |
| //mul | |
| mov a , #25h | |
| mul ab | |
| mov 12h,a | |
| mov 13h,b | |
| //div | |
| mov a,#25h | |
| mov b,#12h | |
| div ab | |
| mov 14h,a | |
| mov 15h,b | |
| //logical operators | |
| //AND | |
| mov a,#25h | |
| mov b,#12h | |
| anl a,b | |
| mov 10h,a | |
| //OR | |
| mov a,#25h | |
| mov b,#12h | |
| orl a,b | |
| mov 17h,a | |
| //XOR | |
| mov a,#25h | |
| mov b,#12h | |
| xrl a,b | |
| mov 18h,a | |
| //complement | |
| cpl a, | |
| mov 19h,a | |
| //clear | |
| clr a | |
| mov 20h, a | |
| halt:sjmp halt | |
| end | |
| To add following data and then use the simulator to examine the EY flag | |
| org 0000h | |
| mov a,#92h | |
| mov r0,#23h | |
| add a,r0 | |
| jnc l1 | |
| inc r7 | |
| l1:mov r1,#66h | |
| add a,r1 | |
| jnc l2 | |
| inc r7 | |
| l2:mov r2,#87h | |
| add a,r2 | |
| jnc l3 | |
| inc r7 | |
| l3:mov r3,#073h | |
| add a,r3 | |
| jnc l4 | |
| jnc r7 | |
| l4: | |
| here:sjmp here | |
| end | |
| TO LOAD VALUE INTO R0 R4 THEN PUSH INTO STACK THEN CLEAR AND POP THEM BACK | |
| org 0000h | |
| mov r0,#25h | |
| mov r1,#35h | |
| mov r2,#45h | |
| mov r3,#55h | |
| mov r4,#65h | |
| push 0 | |
| push 1 | |
| push 2 | |
| push 3 | |
| push 4 | |
| mov r0,#00h | |
| mov r1,#00h | |
| mov r2,#00h | |
| mov r3,#00h | |
| mov r4,#00h | |
| pop 0 | |
| pop 1 | |
| pop 2 | |
| pop 3 | |
| pop 4 | |
| end | |
| CALCULATE CUBE OF A NUMBER | |
| org 0000h | |
| mov a,20h | |
| mov b,a | |
| mul ab | |
| mov r0,b | |
| mov b,20h | |
| mul ab | |
| mov 23h,a | |
| mov r1,b | |
| mov a,r0 | |
| mov b,20h | |
| mul ab | |
| mov 21h,b | |
| mov b,r1 | |
| add a,b | |
| mov 22h,a | |
| mov a,21h | |
| addc a,#0h | |
| mov 21h,a | |
| stop:sjmp stop | |
| end | |
| FACTORIAL | |
| org 0000h | |
| mov r1,#05h | |
| mov r7,#01h | |
| lcall fact | |
| mov r7,a | |
| fact: | |
| mov a,r7 | |
| cjnc r1,#00,up | |
| sjmp up1 | |
| up: | |
| mov b,r1 | |
| mul ab | |
| djnz r1,up | |
| up1: | |
| ret | |
| end | |
| LARGEST NUMBER IN THE SERIES | |
| ORG 0000H | |
| MOV R0,#50H | |
| MOV A,@R0 | |
| MOV R2,A | |
| DEC R2 | |
| INC R0 | |
| MOV B,@R0 | |
| INC RO | |
| BACK:MOV A,@R0 | |
| CJNE A,B,LOOP | |
| JMP LOOP1 | |
| LOOP: JC LOOP1 | |
| MOV B,A | |
| LOOP1: INC R0 | |
| DJNZ R2,BACK | |
| NEXT: MOV 60H,B | |
| END | |
| SMALLEST NUMBER | |
| ORG 0000H | |
| MOV R0,#50H | |
| MOV A,@R0 | |
| MOV R2,A | |
| DEC R2 | |
| INC R0 | |
| MOV B,@R0 | |
| INC RO | |
| BACK:MOV A,@R0 | |
| CJNE A,B,LOOP | |
| JMP LOOP1 | |
| LOOP: JNC LOOP1 | |
| MOV B,A | |
| LOOP1: INC R0 | |
| DJNZ R2,BACK | |
| NEXT: MOV 60H,B | |
| END | |
| VIT UNIVERSITY | |
| ORG 0000H | |
| MOV DPTR,#MYDATA | |
| MOV R0,#40H | |
| MOV R2,#13H | |
| BAC:CLR A | |
| MOVC A,@A+DPTR | |
| MOV @R0,A | |
| INC DPTR | |
| INC R0 | |
| DJNZ R2,BACK | |
| HERE:SJMP HERE | |
| ORG 200H | |
| MY DATA:DB "VIT UNIVERSITY" | |
| END | |
| TRANSFERRING STRING ADDRESS STARTING FROM 200H TO RAM LOCATIONS STARTING | |
| AT 40H AND THEN MOVE TO 60H | |
| ORG 0000H | |
| MOV DPTR,#MYDATA | |
| MOV R0,#40H | |
| MOV R2,#11H | |
| MOV R1,#60H | |
| MOV R3,#11H | |
| BAC:CLR A | |
| MOVC A,@A+DPTR | |
| MOV @R0,A | |
| INC DPTR | |
| INC R0 | |
| DJNZ R2,BACK | |
| MOV R0,#40H | |
| AGAIN:MOV A,@R0 | |
| MOV @R1,A | |
| INC R0 | |
| INC R1 | |
| DJNZ R3,AGAIN | |
| HERE:SJMP HERE | |
| ORG 200H | |
| MY DATA:DB "VIT UNIVERSITY" | |
| END | |
| CONVERSION OF DATA- TO GET A BYTE OF HEX DATA FROM P1, CONVERT IT TO DECIMAL | |
| AND THEN TO ASCII. PLACE THE ASCII IN RAM LOCATIONS STARTING AT 40H | |
| ORG 0000H | |
| MOV P1,#0FBH | |
| MOV R0, #40H | |
| MOV A, P1 | |
| LOOP: MOV B, #10 | |
| DIV AB | |
| XCH A,B | |
| ADD A, #30H | |
| MOV @R0, A | |
| XCH A,B | |
| INC R0 | |
| JNZ LOOP | |
| END | |
| TRANSFER CONTENT OF P1 TO P2 USING ACCUMULATOR | |
| mov a, #0ffh ;a=ff hex | |
| mov p1,a ; make p1 and i/p port | |
| back: mov a, p1 | |
| mov p2, a | |
| sjmp back | |
| end | |
| GENERATE WAVE FORM HAVING XTAL=11.0592Hz | |
| ORG 000H | |
| MOV TMOD,#10H | |
| AGAIN:MOV TL1,#1AH | |
| MOV TH1,#0FFH | |
| SETB TR1 | |
| BACK: JNB TF1,BACK | |
| CLR TR1 | |
| CPL P1.5 | |
| CLR TF1 | |
| SJMP AGAIN | |
| END | |
| TOGGLE ALL BITS OF P1 USING 200 ms WITH CRYSTAL FREQUENCY OF 11.0592Hz | |
| MOV A,#55H | |
| AGAIN: MOV P0,A | |
| MOV P1,A | |
| MOV P2,A | |
| MOV P3,A | |
| ACALL DELAY | |
| CPL A | |
| SJMP AGAIN | |
| DELAY:MOV R5,#2 | |
| HERE1:MOV R4,#180 | |
| HERE2:MOV R3,#255 | |
| HERE3:DJNZ R3,HERE3 | |
| DJNZ R4, HERE2 | |
| DJNZ R5, HERE1 | |
| RET | |
| TO GET 40% AND 70% DUTY CYCLE USING INTERRUPTS | |
| ORG 0000H | |
| BACK: | |
| SETB P0.1 | |
| SETB P1.1 | |
| LCALL DELAY | |
| LCALL DELAY | |
| LCALL DELAY | |
| LCALL DELAY | |
| CPL P0.1 | |
| LCALL DELAY | |
| LCALL DELAY | |
| LCALL DELAY | |
| CPL P1.1 | |
| LCALL DELAY | |
| LCALL DELAY | |
| LCALL DELAY | |
| SJMP BACK | |
| DELAY: | |
| MOV R0,#01H | |
| MOV R1,#01H | |
| A1:MOV R1,A2 | |
| DJNZ R0,A1 | |
| RET | |
| END | |
| CREATE A PROGRAM FOR 50 ms on & 50 ms off | |
| ORG 0000H | |
| LJMP MAIN | |
| ORG 000BH | |
| DJNZ R0,TEN | |
| MOV R0,#36 | |
| JB P1.1,ONN | |
| DJNZ R2,TEN | |
| MOV R2,#0 | |
| SET B P1.1 | |
| CPL P0.1 | |
| SJMP TEN | |
| ONN: DJNZ R1,TEN | |
| MOV R1,#5 | |
| CLR P1.1 | |
| CLR P0.1 | |
| TEN:RET I | |
| ORG 0030H | |
| MAIN: | |
| MOV R0,#36 | |
| MOV R1,#5 | |
| MOV R2,#0 | |
| MOV TMOD,#2H | |
| MOV TH0,#-255 | |
| MOV IE,#82H | |
| SETB P1.1 | |
| SET B TR0 | |
| BACK:SJMP BACK | |
| END | |
| Microprocessor Codes: | |
| 1)CUBE OF A NUMBER | |
| ORG 0000H | |
| MOV A,20H | |
| MOV B,A | |
| MUL AB | |
| MOV 21H,A | |
| MOV 22H,B | |
| MOV A,20H | |
| MOV B,21H | |
| MUL AB | |
| MOV 23H,A | |
| MOV 24H,B | |
| MOV A,20H | |
| MOV B,22H | |
| MUL AB | |
| MOV 25H,A | |
| MOV 26H,B | |
| MOV 30H,23H | |
| MOV A,24H | |
| MOV A,25H | |
| MOV 31H,26H | |
| ADDC A,#0H | |
| MOV 32H,A | |
| 2)PUSH OR POP | |
| ORG 0000H | |
| MOV R0,#25H | |
| MOV R1,#35H | |
| MOV R2,#45H | |
| MOV R3,#55H | |
| MOV R4,#65H | |
| PUSH 0 | |
| PUSH 1 | |
| PUSH 2 | |
| PUSH 3 | |
| PUSH 4 | |
| MOV R0,#00H | |
| MOV R1,#00H | |
| MOV R2,#00H | |
| MOV R3,#00H | |
| MOV R4,#00H | |
| POP 4 | |
| POP 3 | |
| POP 2 | |
| POP 1 | |
| POP 0 | |
| END | |
| 3)FACTORIAL OF A NUMBER | |
| ORG 0000H | |
| MOV R1,#05H | |
| MOV R7,#01H | |
| LCALL FACT | |
| MOV R7,A | |
| FACT: | |
| MOV A,R7 | |
| CJNE R1,#00,UP | |
| SJMP UP1 | |
| UP: | |
| MOV B,R1 | |
| MUL AB | |
| DJNZ R1,UP | |
| UP1: | |
| RET | |
| END | |
| 4)FIND THE LARGEST ELEMENT IN A ARRAY | |
| ORG 0000H | |
| MOV R0,#50H | |
| MOV A,@R0 | |
| MOV R2,A | |
| DEC R2 | |
| INC R0 | |
| MOV B,@R0 | |
| INC R0 | |
| BACK:MOV A,@R0 | |
| CJNE A,B,LOOP | |
| JMP LOOP1 | |
| LOOP:JC LOOP 1 | |
| MOV B,A | |
| LOOP1:INC R0 | |
| DJNZ R2,BACK | |
| NEXT:MOV 60H,B | |
| END | |
| 5)Copy string from ram 200h to ram 40h | |
| ORG 0000H | |
| MOV DPTR,#MYDATA | |
| MOV R0,#40H | |
| MOV R2,#13H | |
| BACK: CLR A | |
| MOVC A,@A+DPTR | |
| MOV @R0,A | |
| INC DPTR | |
| INC R0 | |
| DJNZ R2,BACK | |
| HERE :SJMP HERE | |
| ORG 200H | |
| MYDATA: DB “VITUNIVERSITY” | |
| END | |
| 6)COPYING TO LOCATION 60H | |
| ORG 0000H | |
| MOV DPTR,#MYDATA | |
| MOV R0,#40H | |
| MOV R2,#11H | |
| MOV R1,#60H | |
| MOV R3,#11H | |
| BACK:CLR A | |
| MOVC A+@A+DPTR | |
| MOV @R0,A | |
| INC DPTR | |
| INC R0 | |
| DJNZ R2,BACK | |
| MOV R0,#40H | |
| AGAIN: MOV A,@RO | |
| MOV @R1,A | |
| INC R0 | |
| INC R1 | |
| DJNZ R3,AGAIN | |
| HERE: SJMP HERE | |
| ORG 200H | |
| MYDATA:DB “ANYA SOROHI” | |
| END | |
| 7)EXCHANGE VALUES | |
| ORG 0000H | |
| MOV P1,#0FBH | |
| MOV R0,#40H | |
| MOV A,P1 | |
| LOOP:MOVB,#10 | |
| DIV AB | |
| XCH A,B | |
| ADD A,#30H | |
| MOV @R0,A | |
| XCH A,B | |
| INC R0 | |
| JNZ LOOP | |
| END | |
| 8)MOV VALUE 55H TO P1,P2,P3 SIMULTANEOUSLY | |
| ORG 0000H | |
| MOV A,#55H | |
| AGAIN:MOV P0,A | |
| MOV P1,A | |
| MOV P2,A | |
| MOV P3,A | |
| ACALL DELAY | |
| CPL A | |
| SJMP AGAIN | |
| DELAY:MOV R5,#2 | |
| HERE1:MOV R4,#180 | |
| HERE2:MOV R3,#255 | |
| HERE3:DJNZ R3,HERE3 | |
| DJNZ R4,HERE2 | |
| DJNZ R5,HERE1 | |
| RET | |
| 9)250 MICROSECS DELAY USING TIMERS | |
| ORG 0000H | |
| MOV TMOD,#10H | |
| AGAIN: TL1,#1AH | |
| MOV TH1, #0FFH | |
| SETB TR1 | |
| BACK:JNB TF1,BACK | |
| CLR TR1 | |
| CPL P1.5 | |
| CLR TF1 | |
| SJMP AGAIN | |
| END | |
| 10)MOVING VALUES FROM P1 TO P2 | |
| ORG 0000H | |
| MOV A,#0FFH | |
| MOV P1,A | |
| BACK: MOV A,P1 | |
| MOV P2,A | |
| SJMP BACK | |
| END | |
| 11)SERIAL COMMUNICATION- A | |
| ORG 000H | |
| SJMP MAIN | |
| MAIN:MOV TMOD,#20H | |
| MOV TH1,#-6 | |
| MOV SCON,#50H | |
| SETB TR1 | |
| AGAIN: MOV SBUF,#”A” | |
| HERE:JNB TI, HERE | |
| CLR TI | |
| SJMP AGAIN | |
| END | |
| 12)VIT UNIVERSITY | |
| ORG 0000H | |
| SJMP MAIN | |
| MAIN: MOV DPTR,#3000H | |
| MOV TMOD,#20H | |
| MOV RO,#0EH | |
| MOV TH1,#0FDH | |
| MOV SCON,#50H | |
| SETB TR1 | |
| UP:CLR A | |
| MOVC A,@A+DPTR | |
| AGAIN:MOV SBUF,A | |
| HERE:JNB T1, HERE | |
| CLR TI | |
| INC DPTR | |
| DJNZ R0,UP | |
| SJMP $ | |
| ORG 3000H | |
| DB ‘VIT UNIVERSITY’ | |
| END | |
| 13) | |
| ORG 0000H | |
| MOV TMOD,#20H | |
| MOV SCON, #50H | |
| SETB TR1 | |
| HERE: JNB RI,HERE | |
| MOV A,SBUF | |
| MOV P1,A | |
| CLR RI | |
| SJMP HERE | |
| END | |
| 14) PROGRAM THAT CONTINUOUSLY SENDS 8 BIT DATA FROM | |
| P0 TO P1 WHILE CREATING A SQUARE WAVE OF 200US PERIOD | |
| ON PIN P2.1. USE TIMER 0 | |
| ORG 0000H | |
| LJMP MAIN | |
| ORG 000BH | |
| CPL P2.1 | |
| RETI | |
| ORG 0030H | |
| MAIN:MOV TMOD,#02H | |
| MOV P0,#0FFH | |
| MOV TH0,#-92 | |
| MOV IE,#82H | |
| SETB TRO | |
| BACK:MOV A, P0 | |
| MOV P1,A | |
| SJMP BACK | |
| END | |
| 15)GENERATE TWO WAVES FOR DUTY CYCLE 40% AND 70% | |
| USING INTERRUPT | |
| ORG 0X000 | |
| MOV TMOD,#01H | |
| MOV TH0,#0FDH | |
| MOV TH0,#0F0H | |
| MOV TH1,#0C9H | |
| MOV TL1,#0C7H | |
| MOV TCON,#52H | |
| MOV P1,#00H | |
| MOV P2,#00H | |
| SETB ET0 | |
| SETB ET1 | |
| SETB EA | |
| MAIN: LOOP: | |
| SJMP MAIN-LOOP | |
| TIME Q0-ISR | |
| CLR TF0 | |
| MOV TH0,#0FDH | |
| MOV TL0,#0FDH | |
| CPL P1.0 | |
| RETI | |
| TIME Q1-ISR | |
| CLR TF1 | |
| MOV TH1,#0C7H | |
| MOV TL1,#0C7H RETE | |
| CPL P2.0 | |
| END | |
| 16)WAVEFORM THAT GENERATES (ON-50MS, OFF-80MS) | |
| ORG 0000H | |
| LJMP MAIN | |
| ORG 000BH | |
| DJNZ R0,TEN | |
| MOV R0,#36H | |
| JB P1.1,0HN | |
| DJNZ R2,TEN | |
| MOV R2,#8 | |
| SETB P1.1 | |
| CPL P0.1 | |
| SJMP TEN | |
| CONN:DJNZ R1,TEN | |
| MOV R1,#5 | |
| CPL P1.1 | |
| CPL P0.1 | |
| TEN RETI | |
| ORG 0030H | |
| MAIN: | |
| MOV R0,#36 | |
| MOV R1,#5 | |
| MOV R2,#8 | |
| MOV TMOD,#24 | |
| MOV THO,#-255 | |
| MOV IE,#82H | |
| SETB P1.1 | |
| SETB TR0 | |
| BACK:SJMP BACK | |
| END | |
| Microprocessor Codes: | |
| 1)CUBE OF A NUMBER | |
| ORG 0000H | |
| MOV A,20H | |
| MOV B,A | |
| MUL AB | |
| MOV 21H,A | |
| MOV 22H,B | |
| MOV A,20H | |
| MOV B,21H | |
| MUL AB | |
| MOV 23H,A | |
| MOV 24H,B | |
| MOV A,20H | |
| MOV B,22H | |
| MUL AB | |
| MOV 25H,A | |
| MOV 26H,B | |
| MOV 30H,23H | |
| MOV A,24H | |
| MOV A,25H | |
| MOV 31H,26H | |
| ADDC A,#0H | |
| MOV 32H,A | |
| 2)PUSH OR POP | |
| ORG 0000H | |
| MOV R0,#25H | |
| MOV R1,#35H | |
| MOV R2,#45H | |
| MOV R3,#55H | |
| MOV R4,#65H | |
| PUSH 0 | |
| PUSH 1 | |
| PUSH 2 | |
| PUSH 3 | |
| PUSH 4 | |
| MOV R0,#00H | |
| MOV R1,#00H | |
| MOV R2,#00H | |
| MOV R3,#00H | |
| MOV R4,#00H | |
| POP 4 | |
| POP 3 | |
| POP 2 | |
| POP 1 | |
| POP 0 | |
| END | |
| 3)FACTORIAL OF A NUMBER | |
| ORG 0000H | |
| MOV R1,#05H | |
| MOV R7,#01H | |
| LCALL FACT | |
| MOV R7,A | |
| FACT: | |
| MOV A,R7 | |
| CJNE R1,#00,UP | |
| SJMP UP1 | |
| UP: | |
| MOV B,R1 | |
| MUL AB | |
| DJNZ R1,UP | |
| UP1: | |
| RET | |
| END | |
| 4)FIND THE LARGEST ELEMENT IN A ARRAY | |
| ORG 0000H | |
| MOV R0,#50H | |
| MOV A,@R0 | |
| MOV R2,A | |
| DEC R2 | |
| INC R0 | |
| MOV B,@R0 | |
| INC R0 | |
| BACK:MOV A,@R0 | |
| CJNE A,B,LOOP | |
| JMP LOOP1 | |
| LOOP:JC LOOP 1 | |
| MOV B,A | |
| LOOP1:INC R0 | |
| DJNZ R2,BACK | |
| NEXT:MOV 60H,B | |
| END | |
| 5)Copy string from ram 200h to ram 40h | |
| ORG 0000H | |
| MOV DPTR,#MYDATA | |
| MOV R0,#40H | |
| MOV R2,#13H | |
| BACK: CLR A | |
| MOVC A,@A+DPTR | |
| MOV @R0,A | |
| INC DPTR | |
| INC R0 | |
| DJNZ R2,BACK | |
| HERE :SJMP HERE | |
| ORG 200H | |
| MYDATA: DB “VITUNIVERSITY” | |
| END | |
| 6)COPYING TO LOCATION 60H | |
| ORG 0000H | |
| MOV DPTR,#MYDATA | |
| MOV R0,#40H | |
| MOV R2,#11H | |
| MOV R1,#60H | |
| MOV R3,#11H | |
| BACK:CLR A | |
| MOVC A+@A+DPTR | |
| MOV @R0,A | |
| INC DPTR | |
| INC R0 | |
| DJNZ R2,BACK | |
| MOV R0,#40H | |
| AGAIN: MOV A,@RO | |
| MOV @R1,A | |
| INC R0 | |
| INC R1 | |
| DJNZ R3,AGAIN | |
| HERE: SJMP HERE | |
| ORG 200H | |
| MYDATA:DB “ANYA SOROHI” | |
| END | |
| 7)EXCHANGE VALUES | |
| ORG 0000H | |
| MOV P1,#0FBH | |
| MOV R0,#40H | |
| MOV A,P1 | |
| LOOP:MOVB,#10 | |
| DIV AB | |
| XCH A,B | |
| ADD A,#30H | |
| MOV @R0,A | |
| XCH A,B | |
| INC R0 | |
| JNZ LOOP | |
| END | |
| 8)MOV VALUE 55H TO P1,P2,P3 SIMULTANEOUSLY | |
| ORG 0000H | |
| MOV A,#55H | |
| AGAIN:MOV P0,A | |
| MOV P1,A | |
| MOV P2,A | |
| MOV P3,A | |
| ACALL DELAY | |
| CPL A | |
| SJMP AGAIN | |
| DELAY:MOV R5,#2 | |
| HERE1:MOV R4,#180 | |
| HERE2:MOV R3,#255 | |
| HERE3:DJNZ R3,HERE3 | |
| DJNZ R4,HERE2 | |
| DJNZ R5,HERE1 | |
| RET | |
| 9)250 MICROSECS DELAY USING TIMERS | |
| ORG 0000H | |
| MOV TMOD,#10H | |
| AGAIN: TL1,#1AH | |
| MOV TH1, #0FFH | |
| SETB TR1 | |
| BACK:JNB TF1,BACK | |
| CLR TR1 | |
| CPL P1.5 | |
| CLR TF1 | |
| SJMP AGAIN | |
| END | |
| 10)MOVING VALUES FROM P1 TO P2 | |
| ORG 0000H | |
| MOV A,#0FFH | |
| MOV P1,A | |
| BACK: MOV A,P1 | |
| MOV P2,A | |
| SJMP BACK | |
| END | |
| 11)SERIAL COMMUNICATION- A | |
| ORG 000H | |
| SJMP MAIN | |
| MAIN:MOV TMOD,#20H | |
| MOV TH1,#-6 | |
| MOV SCON,#50H | |
| SETB TR1 | |
| AGAIN: MOV SBUF,#”A” | |
| HERE:JNB TI, HERE | |
| CLR TI | |
| SJMP AGAIN | |
| END | |
| 12)VIT UNIVERSITY | |
| ORG 0000H | |
| SJMP MAIN | |
| MAIN: MOV DPTR,#3000H | |
| MOV TMOD,#20H | |
| MOV RO,#0EH | |
| MOV TH1,#0FDH | |
| MOV SCON,#50H | |
| SETB TR1 | |
| UP:CLR A | |
| MOVC A,@A+DPTR | |
| AGAIN:MOV SBUF,A | |
| HERE:JNB T1, HERE | |
| CLR TI | |
| INC DPTR | |
| DJNZ R0,UP | |
| SJMP $ | |
| ORG 3000H | |
| DB ‘VIT UNIVERSITY’ | |
| END | |
| 13) | |
| ORG 0000H | |
| MOV TMOD,#20H | |
| MOV SCON, #50H | |
| SETB TR1 | |
| HERE: JNB RI,HERE | |
| MOV A,SBUF | |
| MOV P1,A | |
| CLR RI | |
| SJMP HERE | |
| END | |
| 14) PROGRAM THAT CONTINUOUSLY SENDS 8 BIT DATA FROM | |
| P0 TO P1 WHILE CREATING A SQUARE WAVE OF 200US PERIOD | |
| ON PIN P2.1. USE TIMER 0 | |
| ORG 0000H | |
| LJMP MAIN | |
| ORG 000BH | |
| CPL P2.1 | |
| RETI | |
| ORG 0030H | |
| MAIN:MOV TMOD,#02H | |
| MOV P0,#0FFH | |
| MOV TH0,#-92 | |
| MOV IE,#82H | |
| SETB TRO | |
| BACK:MOV A, P0 | |
| MOV P1,A | |
| SJMP BACK | |
| END | |
| 15)GENERATE TWO WAVES FOR DUTY CYCLE 40% AND 70% | |
| USING INTERRUPT | |
| ORG 0X000 | |
| MOV TMOD,#01H | |
| MOV TH0,#0FDH | |
| MOV TH0,#0F0H | |
| MOV TH1,#0C9H | |
| MOV TL1,#0C7H | |
| MOV TCON,#52H | |
| MOV P1,#00H | |
| MOV P2,#00H | |
| SETB ET0 | |
| SETB ET1 | |
| SETB EA | |
| MAIN: LOOP: | |
| SJMP MAIN-LOOP | |
| TIME Q0-ISR | |
| CLR TF0 | |
| MOV TH0,#0FDH | |
| MOV TL0,#0FDH | |
| CPL P1.0 | |
| RETI | |
| TIME Q1-ISR | |
| CLR TF1 | |
| MOV TH1,#0C7H | |
| MOV TL1,#0C7H RETE | |
| CPL P2.0 | |
| END | |
| 16)WAVEFORM THAT GENERATES (ON-50MS, OFF-80MS) | |
| ORG 0000H | |
| LJMP MAIN | |
| ORG 000BH | |
| DJNZ R0,TEN | |
| MOV R0,#36H | |
| JB P1.1,0HN | |
| DJNZ R2,TEN | |
| MOV R2,#8 | |
| SETB P1.1 | |
| CPL P0.1 | |
| SJMP TEN | |
| CONN:DJNZ R1,TEN | |
| MOV R1,#5 | |
| CPL P1.1 | |
| CPL P0.1 | |
| TEN RETI | |
| ORG 0030H | |
| MAIN: | |
| MOV R0,#36 | |
| MOV R1,#5 | |
| MOV R2,#8 | |
| MOV TMOD,#24 | |
| MOV THO,#-255 | |
| MOV IE,#82H | |
| SETB P1.1 | |
| SETB TR0 | |
| BACK:SJMP BACK | |
| END | |