ControlUnit

16-bit ALU with ESP32 Control Unit

This project implements a 16-bit Arithmetic Logic Unit (ALU) using TTL (74 series) digital integrated circuits. The control unit is built using an ESP32 microcontroller, enhancing functionality with a user-friendly interface via an OLED display and a rotary encoder for selecting operations.

Disclaimer: This is my first PCB design, and there may be flaws.This may be the worls worst ALU!. Any feedback or suggestions for improvement are welcome.

Features

• Arithmetic Operations: Addition, Subtraction, Increment, Decrement.
• Logical Operations: AND, OR, XOR, NOT.
• User Interface: An OLED display shows the current operation, and a rotary encoder allows for easy selection of operations.
• Control Mechanism: ESP32 provides control signals and manages data flow within the ALU using shift registers.

Components Used

• TTL ICs (74 series) for logic implementation
• ESP32 microcontroller for control signals
• OLED Display (SH1106) for displaying selected operation and result
• Rotary Encoder (KY-040) for operation selection
• Shift Registers (74HC595) for handling input/output

Project Structure

• main_code.ino: The primary Arduino code for the ESP32, managing the control signals, encoder input, OLED output, and ALU operations.
• images/: Contains bitmaps for icons representing each operation.
• README.md: Project documentation.

How It Works

1. Control Unit: The ESP32 microcontroller generates control signals based on user input from the rotary encoder. The OLED screen displays the current operation, input values, and results.
2. ALU Operations: The ALU performs selected operations on 16-bit data, interfaced via shift registers.
3. Result Display: The result of the operation is shown on the OLED display.

Setup and Usage

1. Connect the ESP32 to the OLED display and rotary encoder.
2. Interface the shift registers with TTL ICs to implement the 16-bit ALU logic.
3. Load the Arduino code onto the ESP32.
4. Use the rotary encoder to select the desired operation and input values, then view the result on the OLED display.

Future Improvements

• Expand operations to include multiplication and division.
• Optimize the control signal generation for improved speed and accuracy.
• Add support for additional user inputs or controls to expand functionality.