13911521 Micro Controller Programs

PROGRAMS OF MICROCONTROLLER 8051

1. BINARY IMAGE OF A 8-BIT NUMBER MOV R0,#2CH MOV Rl ,#08H MOV R3,#00H XRL A,A HERE: MOV A,R0 RLC A MOV R0,A MOV A,R3 RRC A MOV R3 ,A DJNZ R1 ,HERE END RESULT=R3

2. BINARY SEARCH MOV DPTR,#1OOOH MOV R0,#08H MOV Rl ,#00H XRL A,A THERE: MOVX A,@DPTR CJNE A,#2CH,HERE INC Rl HERE: INC DPTR DJNZ R0,THERE END OUTPUT : Rl

3. MAXIMA AND MINIMA MOV DPTR,#1000H MOV R1 ,#07H ACALL STORE INC DPTR BACK: XRLA,A MOVX A,@DPTR SUBB A,R0 JNC NMlN / JC NMAX ACALL STORE NMIN: INC DPTR / NMAX: INC DPTR DJNZ R1,BACK JMP ENDL ORG 18H STORE:MOVX A,@DPTR MOV R0,A RET ENDL: END

OUTPUT: R0 INPUT STARTING ADDRESS : 1000H

4. FINDING SQUARE ROOT MOV R0,#90H MOV R1,#00H LOOP: XRL A,A MOV A,R1 MOV B,R1 MUL AB SUBB A,R0 JZ ANS INC R1 AJMP LOOP ANS:END OUTPUT: R1 5. ADDITION OF FIRST 10 NATURAL NUMBERS MOV R0,#0AH XRL A,A LOOP:ADDC A,R0 DJNZ R0,LOOP MOV R1,A END OUTPUT :R1 6. ADDITION OF TWO 8-BIT NUMBERS: SUM CAN BE 8-BIT OR 16-BIT MOV DPTR,#0100H XRL A,A MOVX A,@DPTR MOV R0,A INC DPTR MOVX A,@DPTR ADDC A,R0 INC DPTR MOVX @DPTR,A JNC OK MOV A,#01H INC DPTR MOVX @DPTR,A SJMP ENDL OK: MOV A,#00H INC DPTR MOVX @DPTR,A ENDL:END OUTPUT: 0100H: 1ST NO. ADDRESS 0101H: 2ND NO. ADDRESS

7. DEMO OF PUSH AND POP OPERATIONS MOV SP, #5FH MOV R2, #25H MOV R1, #12H MOV R4, #0F3H PUSH 2 PUSH 1 PUSH 4 MOV R2, #00H MOV R1, #00H MOV R4, #00H POP 4 POP2 POP1 END

;make RAM location 60H,first stack location

8. TO FIND SQUARE OF A NUMBER TAKING INPUT AT P1 AND OUTPUT AT P2 ORG 0000H MOV DPTR,#300H MOV A,#0FFH MOV P1,A BACK:MOV A,P1 MOV A,@A+DPTR MOV P2,A SJMP BACK

;LOAD TABLE ADDRESS ;A=FF ;CONFIGURE P1 INPUT PORT ;GET X ;GET X SQAURE FROM TABLE ;ISSUE IT TO P2 ;KEEP DOING IT

ORG 300H XSQR_TABLE: DB 0,1,4,9,16,25,36,49,64,81 END