SCK_main

📌 Description

Firmware for the main controller of a modular super-custom keyboard.
Handles USB HID communication and I2C messaging with attached key modules.

Fully original implementation — no QMK/KMK framework used.

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How to upload firmware

1. Press D_PG key (Default : FN1 + ```)
2. The LED will blink slowly.
3. At this point, you can build and upload.

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🔧 Development Environment

• IDE: Arduino IDE
• Board: Arduino Pro Micro
  • ATmega32U4, 5V, 16MHz

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🔌 Connected Modules

Each module has its own firmware repo. Flash separately.

• SCK_modules

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📡 Communication (I2C)

• Standard I2C master-slave communication
• Each module is assigned a unique fixed I2C address
• Main controller polls each module individually for input states

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📚 Used Libraries

• NicoHood/HID:
  Used for enhanced USB HID support on ATmega32U4 boards.