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LABORATORY MANUAL OF EEC456 & EEE454

Prepared at Ashoka Institute of Technology & Management, Aktha, Sarnath, Varanasi, U.P.

With

Participation & Valuable Contributions from

Er. Anupam Kumar, ECE, HOD & Assistant Professor, AITM

(anupamkumarmtec@gmail.com)

Department of Electronics & Communication Engineering

1 To study 8085 microprocessor System

2 To study 8086 microprocessor System

3 To develop and run a program for finding out the largest/smallest number from a given set of

numbers.

4 To develop and run a program for arranging in ascending/descending order of a set of numbers

5 To develop and run a programme to compute square root of a given number

6 To perform multiplication/division of given numbers

7 To perform floating point mathematical operations (addition, subtraction, multiplication and

division)

8 To obtain interfacing of keyboard controller

9 To perform interfacing of DMA controller

10 To obtain interfacing of RAM chip to 8085/8086 based system

Textbook: Lab Manual EEC456

Additional Readings:

1. Ramesh Gaonkar,”Microprocessor Architecture, Programming, and Applications with the

8051, 5th

Edition, Penram International Publication (India) Pvt. Ltd.

2. Douglas V. Hail,” Microprocessor and Interfacing,”2nd

Edition,TMH,2006

3. User’s Guide (XPO 85/SW), ANSHUMAN Tech Pvt. Ltd.

Course Code:

E

E

C

4

5

6

Course

Title:

Microprocessors Laboratory

FACULTY NAME MR. ANUPAM KUMAR

Attendance

Weightages

CA MTE ETE

0 0 0

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QUICK STEPS TO LEARN OPERATION WITH KIT

Step I:-Procedure to operate kit using assembly language program.

Do connections as per your figure

Switch ON power supply (i.e. SMPS (Switched mode power supply)

ANSHUMAN will be display on display board.

Press ENTER key

Go to command mode

COMMAND=

Press E

EXPAND=

Press A

2 PASS ASSEMBLER?

Press ENTER key 3 times

Files EXIST?

Press ‘N’ (No)

ARE YOU SURE?

Press ENTER KEY

C=

Press ‘W’

0001 ORG 6000H (Write your program here)

0002 MVI A, 22H

0003 MVI B, 33H

0004 ADD B

0005 RST 1

Press Ctrl key+ C

C=

4

Press ‘A’ Key

Will show message save code at DSTN? Y/N

Press ‘Y’ (Yes)

C=

Press ‘ESC’ two times

COMMAND= (Go to command mode)

Execution of the program

Press ‘G’

Go to?

Press ENTER key 2 times

BURST ADDR

GIVE 6000H

Press ENTER Key

COMMAND= (Go to command mode)

Checking contents of registers

Press ‘S’

SUBSTUT?

Press ENTER key

MEMORY

Press ‘any key’ other than ‘Enter Key’ 2 times

IO REGISTER (GIVE THE NAME)

Press ENTER key

NAME

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A=55(Result i.e. 22+33=55)

NOTE: - On Pressing Enter subsequently all registers contents will display.

PROCEDURE TO OPERATE KIT USING DISASSEMBLER

Press E

EXPAND

Press U

Press ENTER key 3 times

STRT

Give 6000

Press ENTER

END

Give 6009

Press ENTER

DSTN

Give 6000

Press ENTER

PRINTER?

Press ‘’CTR+C’’ step by step

ABBREVIATIONS & DESCRIPTIONS:-

S (SUBSTUT)-Use substitute command to enter program.

Ctr+U- You can check data previously entered by pressing Ctrl-U key.

ESC (Display COMMAND) - Come to command mode.

CR (MEMORY) - Display first mode: Memory.

BURST- Use to BURST Mode.

ADDR- Asks the program address.

COMMAND- Comes back to command mode.

REGISTER- Display next mode: Register.

Any key IO- Displays next mode: Input/output port.

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APPARATUS

8085 TRAINER KIT & 8085 SIMULATOR SOFTWARE

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INTERFACING STUDY CARDS

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OTHERS EXPERIMENTS

AIM: Interfacing and control of stepper motor using 8085 microprocessor.

Apparatus required: stepper motor (12 volts)

SAMPLE PROGRAM: Interface a Stepper Motor to the 8085 microprocessor system and

write an 8085 assembly language program to control the Stepper Motor.

Block Diagram:-

SOFTWARE FOR STEPPER MOTOR CONTROL:

As port A is used as an output port, control word for 8255 is 80H. Stepper Motor Control

Program: 6000H Excite code DB 03H, 06H, 09H, and OCH: This is the code sequence for

clockwise rotation Subroutine to rotate a stepper motor clockwise by 360° - Set the counts:

MVI C, 32H: Set repetition count to 50ıο

START: MVI B, 04H: Counts excitation sequence

LXI H, 6000H: Initialize pointer

BACK1: MOV A, M: Get the Excite code

OUT PORTA: Send Excite code

CALL DELAY: Wait

INX H: Increment pointer

DCR B: Repeat 4 times JNZ BACK l

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Delay subroutine:

Delay: LXI D, Count

Back: DCX D

MOV A, D

ORA E

JNZ Back RET

FLOWCHARTS: Stepper motor subroutine

Conclusion: - A stepper motor is a digital motor. It can be driven by digital signal. Fig.

shows the typical 2 phase motor rated 12V /0.67 A/ph interfaced with the 8085

microprocessor system using 8255. Motor shown in the circuit has two phases, with center-

tap winding. The center taps of these windings are connected to the 12V supply. Due to this,

motor can be excited by grounding four terminals of the two windings. Motor can be rotated

in steps by giving proper excitation sequence to these windings. The lower nibble of port A

of the 8255 is used to generate excitation signals in the proper sequence. These excitation

signals are buffered using driver transistors. The transistors are selected such that they can

source rated current for the windings. Motor is rotated by 1.80 per excitation.

EXPERIMENT

AIM Generation of delay in binary counting using 8085 microprocessor.

SAMPLE PROGRAM Write a program for displaying binary up counter. Counter should

count numbers from 00 to FFH and it should increment after every 0.5 sec.

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Source Program:

LXI SP, 27FFH: Initialize stack pointer

MVI C, OOH: Initialize counter

BACK: CALL Display: Call display subroutine

CALL Delay: Call delay subroutine

INR C: Increment counter

MOV A, C

CPI OOH: Check counter is > FFH

JNZ BACK: If not, repeat

HLT: Stop

Delay Subroutine: Delay: LXI B, count: Initialize count

BACK: DCX D: Decrement count

MOV A, E

ORA D: Logically OR D and E

JNZ BACK: If result is not 0 repeat

RET: Return to main program

Conclusion: Assume operating frequency of 8085 equal to 2MHz. Display routine is

available.

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PHOTO GALLARY: STUDENTS PERFORM EXPERIMENTS ON KIT & SIMULATOR

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LAB ASSIGNMENT

1. (A) Addition of two nos. is stored in location 20C0 & 20C1 respective & result is

stored in 20C2. (B) Subtraction of two no.

2. Write a program using 8085 microprocessor for Decimal, Hexadecimal addition and

subtraction of two numbers.

3. To perform multiplication and division of two 8 bit numbers using 8085.

4. To find the largest and smallest number in an array of data using 8085 instruction

set.

5. To write a program to arrange an array of data in ascending & descending order.

6. To convert given Hexadecimal number into its equivalent ASCII number & vice

versa using 8085.