Microprocessor lab manual
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This document provides instructions and materials for experiments using 8085 and 8086 microprocessors. It includes 10 experiments such as developing programs to find the largest/smallest number, sort numbers, calculate square roots, and perform floating point math. It also covers interfacing the microprocessors to components like keyboards, RAM, and DMA controllers. The document lists the textbook, additional readings, faculty member, and assignments for the course.
Microprocessor lab manual
- 1. 1 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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- 3. 3 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. 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
- 5. 5 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.
- 6. 6 APPARATUS 8085 TRAINER KIT & 8085 SIMULATOR SOFTWARE
- 8. 8 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
- 9. 9 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.
- 10. 10 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.
- 11. 11 PHOTO GALLARY: STUDENTS PERFORM EXPERIMENTS ON KIT & SIMULATOR
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- 13. 13 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.