ATMegaSpin

[!WARNING]
Hey! This project is still a Work in Progress. Files, instructions, and other stuff might change!

Table of contents

1. Goal of the game
2. PCB Pictures
   1. Front
   2. Back
3. Schematics
   1. Electrical schematic
   2. PCB schematic
   3. Mechanical schematic
   4. ATMega328P Pinout
4. GERBER - 3D printed Files - Other Hardware stuff
   1. 3D Printed parts
   2. PCB GERBER File
   3. Electrical parts
5. Installation
   1. Burn bootloader
      1. Needed tools
      2. Circuit
      3. Pinout
      4. Upload ISP sketch
      5. Burn bootloader
         1. Installing Mini-core
         2. Select your device, crystal and programmer and burn bootloader
   2. Upload sketch from programmer
6. Contributions
7. License

ATMegaSpin

Goal of the game:

A LED game where the player has to press a button at the right moment to reach a specific goal. The challenge of the game lies in the speed at which the LEDs blink, the reduction of this speed with each achieved goal, and the necessity to press the button at the right moment to advance in the game.

PCB Pictures:

Front

Back

Schematics

Electrical schematic:

Electrical schematic

PCB schematic:

PCB schematic

Mechanical schematic:

Mechanical schematic

ATMega328P Pinout:

GERBER - 3D printed Files - Other Hardware stuff

3D Printed parts:

3D Printed parts

PCB GERBER File:

PCB GERBER File

Electrical parts:

Prototype

Installation

Before you can connect the ATMega328P microcontroller to the circuit, it's necessary to burn the bootloader of the chip. Once the bootloader is burned, the program can be uploaded to it.

"To program the bootloader and provide to the microcontroller the compatibility with the Arduino Software (IDE) you need to use an In-circuit Serial Programmer (ISP) that is the device that connects to a specific set of pins of the microcontroller to perform the programming of the whole flash memory of the microcontroller, bootloader included. The ISP programming procedure also includes the writing of fuses: a special set of bits that define how the microcontroller works under specific circumstances."

The Memory Map of an ATmega328P

[!IMPORTANT]
The preceding paragraph and illustration were taken from this documentation: Arduino as ISP and Arduino Bootloaders - Accessed on 2023-11-22

Burn bootloader

Needed tools

To burn the bootloader on the microcontroller you need 2 arduino (In this case I use Arduino UNO) cards. The first will be used as an ISP programmer.

Circuit

Pinout

Upload ISP sketch

Once the circuit is connected, follow the following instructions to apply the ISP programming sketch on the Arduino programmer:

1. Open the Arduino IDE and from the menu File > Examples > 11.ArduinoISP > ArduinoISP, load the sketch.
2. Select the proper board (I.E.: Arduino Uno) and upload the sketch

Burn bootloader

Installing Mini-core

1. Open up the Arduino IDE and navigate to the preferences (or press ctrl+,). Copy the following URL into the empty field labelled ‘Additional Boards Manager URLs’: https://mcudude.github.io/MiniCore/package_MCUdude_MiniCore_index.json
2. Go to the boards manager, which can be found under Tools > Board > Boards Manager. Type ‘minicore’ into the search bar and the relevant entry will appear. Select the latest version and click ‘install’. Once the installation is complete, close the boards manager window.

Select your device, crystal and programmer and burn bootloader

1. Select the relevant device, crystal and programmer options under the ‘tools’ menu.
2. Under board, select ‘ATmega328’ (or whichever chip you’re using).
3. Under clock, select the frequency of your external clock. It should be written in block capitals on the top of the crystal’s casing.
4. Set your programmer as ‘Arduino as ISP’
5. Burn the bootloader using the ‘Burn Bootloader’ option at the bottom of the Tools menu.

Upload sketch from programmer

Once the bootloader is burned, open up the Spin.ino sketch. From the menu Sketch use the Upload Using Programmer tool to Upload the sketch to the ATMega328P Target.

Then, you can disconnect the MCU from the Arduino target and clip it to your circuit.

Contributions

Contributions to this project are welcome! If you have ideas for improvements or bug fixes, please follow the contribution guidelines.

1. Fork the project.
2. Create your feature branch: git checkout -b feature/AmazingFeature.
3. Commit your changes: git commit -m 'Add some amazing feature'.
4. Push to the branch: git push origin feature/AmazingFeature.
5. Open a pull request.

License

This project is licensed under the AGPL-3.0 license - see the LICENSE file for details.