Microcomputer System Project 1

This repository contains Project 1 for the Microcomputer System course, implemented in 8051 Assembly Language.

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📝 Project Description

This project implements an 8051 Assembly program that continuously displays a group member's student ID on an 8-digit 7-segment LED display.

The student ID is shown with a leading 0, for example:

01100423

Each digit is displayed one at a time according to a predefined hardware sequence.

Display Sequence

Let the right-most 7-segment display be digit-0, and the left-most one be digit-7.

The required display order is:

digit-0 → digit-2 → digit-4 → digit-6 → digit-7 → digit-5 → digit-3 → digit-1 → digit-0 → ...

Timing Constraints

• Each active digit stays on for 1.0 second
• All digits remain off for 0.5 second between displays

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💡 Implementation Methods

This project explores two different approaches to achieve the required display behavior.

Method 1: Direct Sequencing

Logic
The display positions (P1) and corresponding digit values (P2) are pre-arranged and stored in memory following the exact required display sequence. A register (R0) is used as an index to fetch and display them one by one.

Advantages

• Simple and straightforward program structure
• Easy to modify the display order

Disadvantages

• The original student ID becomes scrambled in memory
• Any change to the ID requires manually rebuilding the sequence array

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Method 2: Algorithmic Traversal

Logic
The student ID digits are stored in normal left-to-right order in memory. The program uses an index register (R0) and a direction flag (R2) to determine the next digit algorithmically.

• When R2 = 0, the pointer shifts left
• When R2 = 1, the pointer shifts right

The program checks boundary positions such as digit-1, digit-6, and digit-7 to determine when to reverse direction.

Advantages

• The student ID remains in natural order and is easy to read
• Changing the student ID is much easier

Disadvantages

• More complex assembly logic
• Requires extra conditional jumps and boundary handling

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📂 Directory Structure

project1_submission/

Contains the final source code submissions and documentation.

• Project_Method1.asm
  Implementation using Method 1: Direct Sequencing

• Project_Method2.asm
  Implementation using Method 2: Algorithmic Traversal

• IDE_test.asm
  Modified script used for testing in the IDE environment

• Project_Report.pdf
  Comprehensive project report including:

  • Flowcharts
  • Logic derivations
  • Delay time calculations
  • Hardware demonstration photos

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project1_ide_test/

Contains the testing project files and virtual hardware configurations for MCU 8051 IDE.

• .adf
• .mcu8051ide
• .vhw

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🎥 Demo Videos

• Microcomputer System (8051) Project 1 Demo Video — Hardware Demonstration
• Microcomputer System (8051) Project 1 IDE Demo — IDE Simulation