Badge addon id firmware for STM32

badge-stm32-eeprom.ino

/**
   STM32 Fake EEPROM Firmware

   Copyright (C) 2020, Uri Shaked. Released under the MIT license.
*/

#include <Wire.h>

#define EEPROM_ADDR 0x50

byte addrReg = 0;
const byte descriptor[] = {
  'L', 'I', 'F', 'E',      // Magic
  4,                       // Device name length
  5,                       // Driver name length
  0,                       // Driver data buffer length
  0,                       // Reversed,
  'T', 'e', 's', 't',      // Device name
  't', 'e', 's', 't', '1'  // driver name
};

void receiveEvent(int count) {
  addrReg = Wire.read();
}

void requestEvent() {
  if (addrReg < sizeof(descriptor)) {
    Wire.write(&descriptor[addrReg], sizeof(descriptor) - addrReg);
  }
}

void setup() {
  Wire.begin(EEPROM_ADDR);
  Wire.onReceive(receiveEvent);
  Wire.onRequest(requestEvent);
}

void loop() {
}