Teensy2DMD - T4.1 Edition with Clock & EEPROM

This is an enhanced version of the Teensy2DMD port for Teensy 4.1 and SmartLED Shield V5. This specific version adds a real-time clock (RTC) feature and persistent memory settings.

🕒 New Features (Clock Edition)

• Real-Time Clock (RTC): Integrated a clock display that can be toggled and updated via serial commands.
• EEPROM Memory: Your settings (like brightness or clock display) are now saved automatically. When you restart the Teensy, it remembers exactly where it left off.
• Hardware: Specifically optimized for Teensy 4.1 and SmartLED Shield V5 (HUB75).

🚀 Improvements from previous version

• Boot Screen: Custom "*** RETROPIE ARCADE SYSTEM READY ***" startup message.
• New Commands:
  • ON / OFF: To control the display power.
  • SETTIME: To update the internal clock via serial.
• Performance: Optimized for high-speed GIF playback on the Teensy 4.1.

💾 Easy Install (HEX File)

1. Download the included .hex file.
2. Use the Teensy Loader to flash it directly to your Teensy 4.1.

⚙️ Requirements for Developers

• Arduino IDE: 1.8.19 recommended.
• Teensyduino: Version 1.58 or higher.
• Libraries:
  • SmartMatrix 4.0.3
  • SdFat 2.3.0
  • TimeLib (for the clock)

📂 How to upload GIFs

1. Connect your Teensy to your PC.
2. Open a terminal (like Tera Term) at 57600 baud.
3. Type RZ and use ZMODEM to send your .gif files to the SD card.

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Credits to the original creator gi1mic and the previous T4.1 port contributors.