/*
  Empty code file used as support for the 4-bit LED Digital Tube Module breakboard
  simulation components and connectors. 
  The breakboard is a four digits seven segment Common Anode display dinamically controlled
  by the use of two 74HC595 shift registers.
  
  Several libraries exist to manage the module to keep the display refreshed:
  - FourBitLedDigitalTube (For AVR Arduino development) (https://github.com/GabyGold67/FourBitLedDigitalTube)
  - SevenSegDisplays (For ESP32 Arduino development) (https://github.com/GabyGold67/SevenSegDisplaysRTOSLib)
  - SevenSegDisplays_STM32 (For STM32 RTOS development) (https://github.com/GabyGold67/SevenSegDisplaysRTOSLib)

  Created by Gabriel D. Goldman, May, 2023.
  Released into the public domain in accordance with "GPL-3.0-or-later" license terms.
*/

const uint8_t dio {XX}; // Pin connected to DS of 74HC595 AKA DIO
const uint8_t rclk {XX}; // Pin connected to ST_CP of 74HC595 AKA RCLK
const uint8_t sclk {XX}; // Pin connected to SH_CP of 74HC595 AKA SCLK