mpmc lab 2014-15

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MICROPROCESSORS & MICROCONTROLLERS

LABORATORY (CSE) MANUAL

Prepared by

SYED.SHAMEEM Assoc.prof[ECE],

(COURSE COORDINATOR)

SCHOOL OF ELECTRICAL SCIENCES

KONERU LAKSHMAIAH UNIVERSITY

2014-15.

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List of Experiments

1. Programs Involving Arithmetic Instructions to

a. Addition, Subtraction, Multiplication and Division of 8-bit data

b. Addition of array of elements of 8-bit data

2. Programs Involving Bit Manipulations to

a. Toggle a LED with random delay (using Set, Clear and Complement)

b. Creating Patterns using 8 LED's

c. Display Numbers using 7-Segment Display

3. Programs involving Study of 8051 Timer/Counter operation

4. Program to Interface 8051 to LCD Display

5. Program to receive data from keyboard and print on display using 8086 interrupts

Experiments to be done in open labs 1. Interfacing A/D & D/A to 8051.

2. Interfacing of Binary Counter 8051

3. Interfacing Stepper Motor 8051/8086.

4. Data Transfer between two PCs using RS.232 C Serial Port.

S o f t w a r e s u s e d : K e i l - u V 4 , p r o t e u s 8 p r o f e s s i o n a l

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1) Programming Arithmetic using 8051 Microcontroller

a)Addition

org 00h

ljmp start

org 100h

start:

mov dptr,#num2 ; Load Address of Second Operand

clr a

movc a,@a+dptr ; Load the value stored in Address available in DPTR

mov b,a ; Create a backup of a as we need to replace it with next value

mov dptr,#num1 ; Load Address of First Operand

clr a

movc a,@a+dptr ; Load the value stored in Address available in DPTR

add a,b ; Adds contents of a,b and stores it in a

here: sjmp here

org 200h

num1: db 25h

num2: db 30h

end

Output:

5

Inputs: Num1=25h

Num2=30h Result: The addition of two 8-bit numbers is performed and the result found in A Register.

1b)Subtraction

org 00h

ljmp start

org 100h

start:

mov dptr,#num2

clr a

movc a,@a+dptr

mov b,a

mov dptr,#num1

clr a

movc a,@a+dptr

subb a,b ; Does a-b-Carry and stores in a

here: sjmp here

org 200h

num1: db 25h

num2: db 30h

6

end Output:

Inputs: Num1=25h

Num2=30h Result: The subtraction of two 8-bit numbers is performed and the result found in A Register.

1c)Programming Arithmetic using 8051 Microcontroller

Multiplication

org 00h

ljmp start

org 100h

start:

mov dptr,#num2

clr a

movc a,@a+dptr

mov b,a

mov dptr,#num1

clr a

movc a,@a+dptr

7

mul ab ; Does a*b , Stores Lower byte in a, Higher byte in b (8 bit mul may result 16 bit

output)

here: sjmp here

org 200h

num1: db 5h

num2: db 3h

end Output:

Inputs: Num1=3Bh

Num2=20h

Result: The multiplication of two 8-bit numbers is performed and the result is 16-bit,the Lower byte

in stored in A register, Higher byte in B register .

1d)Division

org 00h

ljmp start

org 100h

start:

mov dptr,#num2

clr a

movc a,@a+dptr

mov b,a

8

mov dptr,#num1

clr a

movc a,@a+dptr

div ab ; Does a/b , Quotient stored in a, Remainder in b

here: sjmp here

org 200h

num1: db 5h

num2: db 3h

end Output:

Inputs: Num1=4Ch

Num2=31h

Result: The division of two 8-bit numbers is performed and the Quotient is stored in A register,

Remainder in B register.

Programming Arithmetic using 8051 Microcontroller

1e)Addition of Array of Numbers

org 00h

ljmp start ; Upon Reset the following line is executed, program shifts to "start" Label

org 100h

9

start:

mov b,#00h

mov dptr,#num1 ; Loading Address of array

back:

clr a

movc a,@a+dptr ; Loading the value stored in address available in dptr

inc dptr

cjne a,#'$',next ; Compares a with $ and if not equal moves to label "next"

sjmp here ; If compare results equal move to label "here"

next:

add a,b

mov b,a ; Backup of a, as new value is to be loaded into a

sjmp back ; Repeat the operation from "back"

here:

sjmp here ; Wait here

org 200h

num1: db 1h,2h,3h,4h,5h,'$' ; $ is used in this case as end of array, Anything can be used

end

Output:

Input: array values: 1h,2h,3h,4h,5h Result: The addition of array elements is performed and the result was found in B register.

2a)Bit Manipulation Programs

Aim:To Perform bit manipulation programs

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Software Used:

Keil uVision4

Program:

a) Toggling Pin

clr p1.0

back:setb p1.0

acall delay

clr p1.0

acall delay

sjmp back

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

djnz r0,here1

ret

end Output:

Toggling pin:

After some delay

After some delay

RESULT: The toggling of pin p1.0 is performed.

2b) Toggling Port

11

mov p1,#00h

mov a,#55h

back:mov p1,a

acall delay

cpl a

sjmp back

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

djnz r0,here1

ret

end Output:

Toggling port:

After some delay

After some delay

RESULT: The toggling of port1 is performed.

Bit Manipulation Programs

2c) Pattern Generation(Sending values individually)

mov p1,#00h

back:mov p1,#01h

acall delay

mov p1,#03h

acall delay

mov p1,#07h

acall delay

mov p1,#0Fh

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acall delay

mov p1,#1Fh

acall delay

mov p1,#3Fh

acall delay

mov p1,#7Fh

acall delay

mov p1,#0FFh

acall delay

mov p1,#7Fh

acall delay

mov p1,#3Fh

acall delay

mov p1,#1Fh

acall delay

mov p1,#0Fh

acall delay

mov p1,#07h

acall delay

mov p1,#03h

acall delay

mov p1,#01h

acall delay

mov p1,#00h

acall delay

sjmp back

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

djnz r0,here1

ret

end

Output:

Pattern generation:

15

Result: The pattern is generated in port1 from right to left.


2d) Pattern Generation using Rotate Instruction

mov p1,#00h

back:clr a

lsbtomsb: acall delay

setb c

mov p1,a

rlc a

cjne a,#0FFh,lsbtomsb

mov a,#0FFh

msbtolsb: acall delay

clr c

mov p1,a

rrc a

cjne a,#00h,msbtolsb

sjmp back

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

djnz r0,here1

ret

end

e) 7 Segment Display(Sending values individually)

mov p1,#00h

back:

mov a,#00111111b ; Display 0

mov p1,a

acall delay


mov p1,a

acall delay


16

mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay



mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay

sjmp back

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

djnz r0,here1

ret

end

2e) 7 Segment Display(using Dptr and Lookup Table)

mov p1,#00h

main:

mov dptr,#codes

back: clr a

movc a,@a+dptr

jz next

mov p1,a

acall delay

inc dptr

sjmp back

next: sjmp main

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

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djnz r0,here1

ret

codes: db 3Fh,06h,5Bh,4Fh,66h,6Dh,7Dh,07h,7Fh,6Fh,0

end

Result: Bit manipulation programs are performed

7-segment LED display mov p1,#00h

back:


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay


mov p1,a

acall delay

sjmp back

delay: mov r0,#5d

here1:mov r1,#2d

here:djnz r1,here

djnz r0,here1

ret

end

7segment display: Output:

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Result: The numbers from 0 to 9 are displayed on 7-segment display.

3.)Programming involving Timer/Counter operation:

ORG 00H

RPT: MOV TMOD,#15H

SETB P3.4

MOV TL0,#00H

MOV TH0,#00H

SETB TR0

MOV R0,#28

AGAIN: MOV TL1,#00H

MOV TH1,#00H

SETB TR1

BACK: JNB TF1,BACK

CLR TF1

CLR TR1

DJNZ R0,AGAIN

MOV A,TL0

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MOV P2,A

MOV A,TH0

MOV P1,A

SJMP RPT

END

Counter : Output:

Result: The pin p3.4 is pressed for 2 times in a second.(counter value is 2 with in an second)

4.)Program to interface 8051 to LCD:

ORG 0H

MOV A,#38H

ACALL CMD

ACALL DELAY

MOV A,#0EH

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ACALL CMD

ACALL DELAY

MOV A,#01H

ACALL CMD

ACALL DELAY

MOV A,#06H

ACALL CMD

ACALL DELAY

MOV A,#80H

ACALL CMD

ACALL DELAY

MOV A,#1CH

ACALL CMD

ACALL DELAY

MOV A,#'0'

ACALL DUMP

ACALL DELAY

MOV A,#'1'

ACALL DUMP

ACALL DELAY

MOV A,#'2'

ACALL DUMP

ACALL DELAY

MOV A,#'3'

ACALL DUMP

ACALL DELAY

MOV A,#'4'

ACALL DUMP

ACALL DELAY

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MOV A,#'5'

ACALL DUMP

ACALL DELAY

MOV A,#'6'

ACALL DUMP

ACALL DELAY

MOV A,#'7'

ACALL DUMP

ACALL DELAY

MOV A,#'8'

ACALL DUMP

ACALL DELAY

MOV A,#'9'

ACALL DUMP

ACALL DELAY

MOV A,#'A'

ACALL DUMP

ACALL DELAY

MOV A,#'B'

ACALL DUMP

ACALL DELAY

MOV A,#'C'

ACALL DUMP

ACALL DELAY

MOV A,#'D'

ACALL DUMP

ACALL DELAY

MOV A,#'E'

ACALL DUMP

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ACALL DELAY

MOV A,#'F'

ACALL DUMP

ACALL DELAY

MOV A,#0C0H

ACALL CMD

ACALL DELAY

MOV A,#07H

ACALL CMD

ACALL DELAY

MOV A,#'0'

ACALL DUMP

ACALL DELAY

MOV A,#'1'

ACALL DUMP

ACALL DELAY

MOV A,#'2'

ACALL DUMP

ACALL DELAY

MOV A,#'3'

ACALL DUMP

ACALL DELAY

MOV A,#'4'

ACALL DUMP

ACALL DELAY

MOV A,#'5'

ACALL DUMP

ACALL DELAY

MOV A,#'6'

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ACALL DUMP

ACALL DELAY

MOV A,#'7'

ACALL DUMP

ACALL DELAY

MOV A,#'8'

ACALL DUMP

ACALL DELAY

MOV A,#'9'

ACALL DUMP

ACALL DELAY

MOV A,#'A'

ACALL DUMP

ACALL DELAY

MOV A,#'B'

ACALL DUMP

ACALL DELAY

MOV A,#'C'

ACALL DUMP

ACALL DELAY

MOV A,#'D'

ACALL DUMP

ACALL DELAY

MOV A,#'E'

ACALL DUMP

ACALL DELAY

MOV A,#'F'

ACALL DUMP

ACALL DELAY

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AGAIN: SJMP AGAIN

CMD: MOV P3,A

CLR P2.0

CLR P2.1

SETB P2.2

ACALL DELAY

CLR P2.2

RET

DUMP: MOV P3,A

SETB P2.0

CLR P2.1

SETB P2.2

ACALL DELAY

CLR P2.2

RET

DELAY: MOV R3,#255

LOOP2: MOV R4,#255

LOOP1: DJNZ R4,LOOP1

DJNZ R3,LOOP2

RET

END

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Output:

Result : the numbers and letters are displayed in LCD.

5. Program to receive data from keyboard and print on display

ORG 0H

;; lcd initialize program

MOV R0,#00H ; COUNTER

MOV A,#38H

ACALL CMD

ACALL DELAY

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MOV A,#0EH

ACALL CMD

ACALL DELAY

MOV A,#01H

ACALL CMD

ACALL DELAY

MOV A,#06H

ACALL CMD

ACALL DELAY

GO: MOV A,#80H

ACALL CMD

ACALL DELAY

;; keypad program starts

MOV P3,#0FFH

K1: MOV P1,#0

MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B,K1

K2: ACALL DELAY

MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B,OVER

SJMP K2

OVER: ACALL DELAY

MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B,OVER1

SJMP K2

OVER1: MOV P1,#11111110B

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MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B, ROW0

MOV P1,#11111101B

MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B, ROW1

MOV P1,#11111011B

MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B, ROW2

MOV P1,#11110111B

MOV A,P3

ANL A,#00001111B

CJNE A,#00001111B, ROW3

LJMP K2

ROW0: MOV DPTR,#KCODE0

SJMP FIND


SJMP FIND


SJMP FIND


SJMP FIND

FIND: RRC A

JNC MATCH

INC DPTR

SJMP FIND

MATCH: CLR A

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MOVC A,@A+DPTR

MOV P2,A

ACALL DUMP

ACALL DELAY

INC R0

CJNE R0,#10H,LAST

MOV A,#0C0H

ACALL CMD

ACALL DELAY

LAST: LJMP K1

CMD: MOV P2,A

CLR P0.0

CLR P0.1

SETB P0.2

ACALL DELAY

CLR P0.2

RET

DUMP: MOV P2,A

SETB P0.0

CLR P0.1

SETB P0.2

ACALL DELAY

CLR P0.2

RET

DELAY: MOV R3,#0FH

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LOOP2: MOV R4,#0FH

LOOP1: DJNZ R4,LOOP1

DJNZ R3,LOOP2

RET

ORG 0300H

KCODE0: DB '3','2','1','0' ;ROW0

KCODE1: DB '7','6','5','4' ;ROW1

KCODE2: DB 'B','A','9','8' ;ROW2

KCODE3: DB 'F','E','D','C' ;ROW3

END

Output:

Result: Keyboard interfacing is done and the keys pressed are displayed on LCD.

mpmc lab 2014-15

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