Simple-Calculator

The AVR-based calculator project aims to design and build a compact electronic device that can perform basic arithmetic operations such as addition, subtraction, multiplication, and division. This project can serve as an educational or practical application of microcontroller programming and digital electronics.

Table of Contents

• Introduction
• Components Used
• Functionality
• Setup
• Usage
• Code Comments
• Simulation
• Future Improvements
• License

Introduction

The ATmega32 Simple Calculator is a basic calculator application that runs on an ATmega32 microcontroller. It can handle four arithmetic operations: addition, subtraction, multiplication, and division. The calculator takes user input through a keypad, displays the input and results on an LCD screen, and provides an output based on the selected operation.

Components Used

• ATmega32 Microcontroller
• GPIO (General Purpose Input/Output) Driver
• LCD (Liquid Crystal Display) Driver
• Keypad Driver
• LCD
• Keypad
• Breadboard and Jump Wires

Functionality

The calculator provides the following functionality:

1. User Input: Users can enter numbers and select arithmetic operations using the keypad.
2. Arithmetic Operations: The calculator supports addition, subtraction, multiplication, and division.
3. Display: User input and calculation results are displayed on the LCD.
4. Clear: Users can clear the input and start a new calculation.

Setup

To set up the project, follow these steps:

1. Connect the ATmega32 microcontroller to the power supply, LCD, and keypad.
2. Configure the GPIO, LCD, and keypad drivers to interact with the hardware.
3. Develop the source code using Microship studio.
4. Load the compiled code onto the microcontroller.
5. Ensure all connections are correct and secure.
6. Power on the microcontroller.

Usage

1. The LCD screen will display the current input or result.
2. Use the keypad to input numbers and select arithmetic operations.
3. Press the appropriate operation key (+, -, *, /) to perform the desired calculation.
4. The result will be displayed on the LCD screen.
5. To start a new calculation, press the clear key.

Code Comments

The source code is developed using Microship studio and is heavily commented to enhance understanding. Each line of code that may require explanation or clarification has a corresponding comment explaining its purpose or functionality.

Simulation

The functionality of the ATmega32 Simple Calculator can be simulated using Proteus. The Proteus simulation file is provided with the project. Follow these steps:

1. Open the Proteus simulation file in Proteus software.
2. Run the simulation to observe how the calculator interacts with the keypad and LCD.

Future Improvements

Here are some ideas for future improvements:

1. Decimal Support: Enhance the calculator to handle decimal numbers and floating-point arithmetic.
2. Advanced Operations: Add support for more advanced operations like square root, exponentiation, etc.
3. User Interface: Design a more user-friendly interface on the LCD for better user experience.