AVR LED Message Signalling

Overview

This project implements a LED-based message signalling system using AVR Assembly on the Arduino Mega2560. Each letter of a message is encoded into a specific LED pattern and duration, allowing messages to be visually displayed using six LEDs.

Features

• LED signalling patterns for alphabet letters
• Short and long display durations
• Assembly functions using registers and stack parameters
• Message display from program memory

How It Works

1. A message is stored in program memory.
2. Each letter is converted into an LED pattern using encode_letter.
3. The pattern and duration are displayed using leds_with_speed.
4. LEDs flash sequentially to represent the full message.

Files

a2-signalling.asm   # Main AVR assembly program
README.md

Concepts Demonstrated

• AVR Assembly programming
• Embedded systems programming
• Bitwise operations
• Function calls and stack usage
• Microcontroller LED control

Author

Jasvin Kaur
Computer Science – University of Victoria