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SSN COLLEGE OF ENGINEERING

DEPARTMENT OF ELECTRICAL & ELECTRONICS

ENGINEERING

LAB MANUAL

EE2356 MICROPROCESSOR & MICRO CONTROLLER

LABORATORY

DEC 2010-APRIL 2011

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Expt.No. Name of the experiment1 Arithmetic operations using 8085 Microprocessor.

2a Sorting of numbers (Ascending & descending) using 8085 Microprocessor.

2b Number conversions (BCD HEX, HEX BCD).

3 Arithmetic operations using 8086 Microprocessor.

4a Interfacing 8 bit ADC Converter with 8085 Microprocessor.

4b Interfacing 8 bit DAC Converter with 8085 Microprocessor.

5 Traffic Light controller using 8085 Microprocessor.

6a Square Wave Generation using 8254

6b Serial Data Transmission using 8251

7 Interfacing 8279 with 8085 microprocessor

8 8 bit Arithmetic operations using 8051 Microcontroller.

9 Finding the smallest and largest number in an array of numbers using 8051Microcontroller

10 Interfacing 8 bit DAC Converter with 8051 Microcontroller

11 Interfacing of Stepper Motor with 8051 Microcontroller

12 Interfacing Traffic Light Controller using 8051

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EXPT NO 1 ARITHMETIC OPERATIONS USING 8085

AIM:

To write the assembly language programs for performing the following

arithmetic operations:a) 16 bit binary addition.

b) 16 bit binary subtraction.

c) 16 bit binary multiplication.

d) 16 bit binary division.

APPARATUS REQUIRED:

Microprocessor kit, Power supply.

PROBLEM STATEMENT:

Write an ALP in 8085 P to add and subtract two 16-bit binary numbers stored

in the memory locations 4100 & 4101 and 4102 & 4103 and store the result starting

from the memory location 4105H. Also provide an instruction in the above program to

observe the carry also and store the carry in the memory location 4104H.

ALGORITHM:

16 BIT ADDITION:

1 Start.

1. Enter the two 16 bit data in two register pairs HL and DE.

2. Initialize a carry counter register B to zero.

3. Add the contents of register pairs.

4. If a carry is generated, increment the carry counter B.

5. Store the Carry in the B register and the sum, which is in the register pair HL in

the memory.6. Stop.

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16 BIT SUBTRACTION:

1. Start.

2. Get the two 16 bit data in two of the register pairs.

3. Subtract the Low Order Byte of data1 from that of the data 2.4. Subtract the How Order Byte of data1 along with borrow from that of the data2.

5. Store the result in memory.

6. Stop.

PROBLEM STATEMENT:

Write an ALP in 8085 P to multiply two 16-bit binary numbers stored in the

memory locations 4100(LOB) & 4101(HOB) and 4102(LOB) & 4103(HOB) and store

the result in the memory location 4104H & 4105H.Write instructions for performing

16-bit division also.

16 BIT MULTIPLICATION.

1. Start.

2. Initialize BC register pair to store the Carry.

3. Store the data 1 and data 2 in DE register pair and SP register.

4. Initialize the HL register pair to zero, to store the result.

5. Multiply by repeated addition of data 1 data 2 times.

6. If carry flag is set during addition., increment the carry register pair.

7. Store the product available in HL pair in memory.

8. Store the contents of the BC register pair which is the carry in memory.

9. Stop.

16 - BIT DIVISION

1. Start.

1. Store the dividend in HL register pair.

2. Store the divisor in BC register pair

3. Initialize the DE register pair to zero, to carry the quotient.

4. Perform repeated subtraction of divisor from dividend till the dividend is less

than the divisor.

5. For every subtraction done, keep on incrementing the quotient register pair DE.

6. Store the remainder pair in memory.

7. Store the quotient in memory.

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8. Stop.

FLOW CHART

16-BIT ADDITION 16-BIT SUBTRACTION

START

INITIALISECARRY REGISTER

LOAD TWO NOS. INREGISTER PAIRS

ADD THE TWONUMBERS

ANYCARRY

INCREMENT

CARRYREGISTER

STORE THERESULT

STOP

NO

YES

START

LOAD THE TWONUMBERS

INTIALIZE BORROWREGISTER

SUBTRACT THETWO NUMBERS

ANYBORROW?

INCREMENTCARRY

REGISTER

STORE THERESULT

STOP

NO

YES

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16-BIT MULTIPLICATION 16-BIT DIVISION

START

GET MULTIPLIER ANDMULTIPLICAND INREGISTER PAIRS

PRODUCT=0000

REG. PAIR = REG. PAIR +MULTIPLICAND

MULTIPLIER =MULTIPLIER 1

IS MULTIPLIER= 0?

NO

STORE REGISTERPAIR

YES

STOP

START

LOAD DIVISOR &DIVIDEND

QUOTIENT = 0

DIVIDEND =DIVIDEND DIVISOR

QUOTIENT =UOTIENT + 1

ISDIVIDEND