NETAJI SUBHAS INSTITUTE OF TECHNOLOGY

EC-316 Microprocessor Lab Project

MATH WIZARD

PROJECT BY:

SACHIN SINGH - 145/EC/13

SIDDHARTH YADAV - 171/EC/13

SYNOPSIS

This is an effort to build a single-player game titled “MATH WIZARD”

using microprocessor 8085. The game consists of a 16*2 LCD device

which is used to display to the user various mathematical equations that

needs to be answered by the user/player. The player has to make use of a

4*3 keypad matrix to press his/her final answer; this answer will be

displayed on the LCD after the button is pressed. After a button is pressed

and answer is displayed on the LCD screen, the buzzer goes off for a few

seconds indicating the user that the answer is correct. The final score will

be displayed on the LCD.

ACKNOWLEDGEMENT

Firstly we would like to thank Prof. Dhananjay Gadre for his unconditional

support and thorough guidance without which this project would not

have seen the light of the day. He not only guided us through the project

but also played a vital role in helping us relate the theoretical concepts

with their practical concepts and instilled in us enthusiasm to LEARN BY

DOING. This project was definitely a milestone in our career and we

learnt a lot more than just electronics, values of hard work and team

work.

We would also like to thank our friends and classmates especially Vikhyat,

Rohan anand and Rahul Vashist who worked with us and helped at each

and every point of time we needed help and assistance. From helping us

learn EAGLE, guiding to get PCB ready, helping us through the soldering

sessions, getting corrections in software and also final checks on the

game (they enjoyed playing the game as well) and what not, they were

always with us. It was a really good memorable experience working with

all of them.

We would also like to thank all the staff of the Department of Electronics

of Netaji Subhas Institute of Technology for providing us with all the

requisites for completion of this project.

TABLE OF CONTENTS :

1. INTRODUCTION

2. PROJECT DESCRIPTION

i) Block Diagram

ii) Components Required

3. SCHEMATIC FILE

4. GANTT CHART REVISITED

5. PICTURES FROM THE PROJECT

6. TESTING AND VALIDATION

7. CONCLUSION

8. BIBLIOGRAPHY

INTRODUCTION :

Intel 8085 was an important milestone in the development of

microprocessors. It required less circuitry as compared to its

contemporary counterparts. As a result, it was possible to build simpler

and cheaper micro-computer systems. Intel 8085 is an ideal

microprocessor for the purpose of introducing students with the vast

subject of microprocessors.

Since we are required to develop a project based on Intel 8085, we

decided to make use of its input-output, interrupt and computational

abilities. We were inspired to make a project whereby we can use all the

above mentioned features of Intel 8085 and use it to create a project

which is fun and enjoyable.

This project was designed for testing speeds of various individuals in

solving mathematical equations as fast as they can. This project can be

extended to various other applications such as testing the IQ of an

individual by displaying various varieties of questions on the 16*2 LCD.

Also the limit of this project can be used in testing the speeds of 2 players

against each other or with respect to time as well.

PROJECT DESCRIPTION i) Block Diagram :-

ii) Components Required:

S.NO COMPONENT NAME QUANTITY/SPEC.

8085 MPU 1

SRAM(62256) 1

EEPROM(28256) 1

Latch(74573) 1

3X8 Active Low Decoder(74138)

1

3X8 Active high Decoder(74238)

1

NOR Gate IC(7402) 1

LED(3MM) 3

Resistors 100,220,5K,10K

Electrolytic Capacitors 10uF

Ceramic Capacitors 22pF, 0.1uF,0.01uF

Quartz crystal 4Mhz

Keypad (4*3) 1 LCD (16*2) 1

SCHEMATIC FILE

BOARD FILE

GANTT CHART REVISITED AND COMPARISION WITH ACTUAL RESULTS

STEP EXPECTED DURATION ACTUAL DURATION

PROPOSAL OF PROJECT 5-11 JAN 2016 5-11 JAN 2016

LEARNING 8085 ARCHITECTURE 10 JAN-09 FEB 2016 10 JAN-9 FEB 2016

BLOCK DIAGRAM/FLOW CHART 07FEB-18 FEB 2016 07 JAN-18 FEB 2016

RAM ROM INTERFACING 14 FEB-25 FEB 2016 14 FEB-1 MARCH 2016

LED AND KEYBOARD INTERFACING 17 FEB-2 MARCH 2016 17 FEB-5 MARCH 2016

LCD INTERFACING 21 FEB-4 MARCH 2016 21 FEB-15 MARCH 2016

FINAL SCHEMATIC 23 FEB - 15 MARCH 2016 5 MARCH -30 MARCH

PROGRAMMING 1 MARCH -25 MARCH 2016 30MARCH - 25APRIL 2016

PCB FABRICATION 12 MARCH - 25 MARCH 2016 12 APRIL - 22 APRIL 2016

ASSEMBLY & TESTING 18 MARCH- 10 APRIL 2016 25 APRIL - 31 MAY 2016

PICTURES FROM THE PROJECT

TESTING AND VALIDATION 1. ICs & COMPONENT TESTING

First of all, after we got the components from market and CEDT lot, we tested all our IC

chips on an IC tester available in Electronics Lab. We also tested LEDs and seven

segment on a breadboard.

2. PROGRAM SIMULATION

We simulated our assembly program on JUBIN 8085 IDE. After writing small

functions we wrote and assembled our complete program on the IDE. The

simulation results on the IDE gave a picture of how the actual project will run,

looking across changes in register values, memory section and i/o ports.

3. TEST SID AND SOD

We burnt a simple SID and SOD program on the ROM and worked out on our project.

The program running clearly gave a sigh of relief that the uP is working alright.

4. CHECK WHETHER INTERRUPTS FUNCTIONING

We burnt a program on the ROM to see whether RST 6.5, 5.5 interrupts we are

using in our project are functioning fine. This test also went well.

5. CHECK OUTPUT LATCHES

We burnt a program on the ROM to light up all LEDs and seven segment connected

to all output ports. We spotted two LEDs that were not functioning and replaced

them.

6. WRITE VARIOUS FUNCTIONS OF THE MAIN PROGRAM

After all this verification we also checked high and low voltages using a multimeter at

various input/ output ports. Thus we began writing different functions on the ROM and

check how it performed. After real time testing we were able to correct various loopholes

in our program and make it better and

CONCLUSION

EC-316 MICROPROCESSORS PROJECT has been a thoroughly enriching

experience. We thank Prof. Gadre for such an opportunity which made us

learn in depth about microprocessors and assembly language

programming as well as small electronics things which are generally

bypassed by the big concepts like led voltages, role of resistors, capacitors

etc. It gave a good experience in digital as well as analog electronics.

Learning by doing was accomplished.

Coming to the project we worked on, we designed a 8085 based project

capable of displaying mathematical equations on the 16*2 LCD and taking

the input from the user using a 4*3 keypad matrix displaying the final

result and buzzer goes on as soon as the answer is displayed.

BIBLIOGRAPHY

TEXTBOOKS:

1. Microprocessor Architecture, Programming, and Applications with the

8085 Author: Ramesh Gaonkar Publisher: Penram International

Publishing (India) Pvt. Ltd Edition: 5th edition ISBN: 9788187972099

2. The 8085 Microprocessor: Architecture, Programming and Interfacing

Author: K.Udaya Kumar, B.S.Umashankar Publisher: Pearson Education

India Edition: 1st edition ISBN: 9788177584554

3. Microprocessors and Interfacing Author: Douglas V. Hall Publisher:

Mcgraw Hill Education Edition: 3rd edition ISBN: 9781259006159

DATASHEETS PROVIDED BY PROF. GADRE

https://drive.google.com/folderview?id=0ByFqcybodzN8LS1PRTliN1lSdUU

&usp=sharing

WEB LINKS

1. https://en.wikipedia.org/wiki/Intel_8085 2.

www.nptel.ac.in/courses/106108100/pdf/Teacher_Slides/mod1/M1L2.pdf

3.http://electronicsproject.org/microprocessor-based-home-security-

system/ 4.http://8085projects.info/page/8085-microprocessor-based-

projects.html 5.http://www.circuitstoday.com/lab-

manuals/microprocessor-lab 6.https://learn.sparkfun.com/tutorials/pull-

up-resistors 7.http://www.labbookpages.co.uk/electronics/debounce.html

8.http://www.all-electric.com/schematic/debounce.html.