SimpleCalculator

A basic calculator implemented in Verilog. This module takes 10-bit switch inputs to perform basic arithmetic operations (addition, subtraction, multiplication, and division) and outputs the result to 8 LEDs.

Features

• Addition: Adds two 4-bit numbers.
• Subtraction: Subtracts a 4-bit number from another.
• Multiplication: Multiplies two 4-bit numbers.
• Division: Divides a 4-bit number by another.
• Remainder Alert: During division, if there is a remainder, the leftmost LED (LED[7]) is turned on as an alert.

Input / Output

• Input (sw[9:0]):
  • sw[9:8]: Operation selector (Mode)
    • 00: Addition
    • 01: Subtraction
    • 10: Multiplication
    • 11: Division
  • sw[7:4]: Operand 1
  • sw[3:0]: Operand 2
• Output (LED[7:0]): 8-bit result of the calculation.

Files

• basic_calc.v: The main Verilog module for the calculator logic.
• constraint.xdc: XDC constraints file for board mapping.

UI Simulator

The demo/fpga-simulator folder contains a React + Vite web application that simulates the Basys 3 FPGA board. It provides an interactive UI with toggleable switches and visual LEDs that mimic the exact behavior of the Verilog Basic_Calculator module.

Running the Simulator

1. Navigate to the simulator directory: cd demo/fpga-simulator
2. Install dependencies: npm install
3. Run the development server: npm run dev
4. Open the provided localhost URL in your browser.