EEPROM Data registers - Mickyleitor/RollerShutterControlPanel GitHub Wiki

#include <EEPROM.h>

#define KEY_LENGTH 92
#define KEY_CRC_LENGTH 1

struct Tcommand {
  byte Key [KEY_LENGTH];
  byte CRC;
} packet;

// Put your own key codes here
byte KEYCODES [9][KEY_LENGTH] = {{}, // Key for Right Down Key command
                                {}, // Key for Right Stop Key command
                                {}, // Key for Right Up Key command  
                                {}, // Key for Center Down Key command  
                                {}, // Key for Center Stop Key command  
                                {}, // Key for Center Up Key command  
                                {}, // Key for Left Down Key command
                                {}, // Key for Left Stop Key command
                                {}}; // Key for Left Up Key command

void setup() {
  Serial.begin(9600);
  
  for( int i = 0 ; i < 9 ; i++){
    memcpy(packet.Key,KEYCODES[i],KEY_LENGTH);
    packet.CRC = CRC8(packet.Key,KEY_LENGTH);
    EEPROM.put(i * sizeof(struct Tcommand), packet);
  }
  
  byte CRCvalue = 0;
  for( int i = 1 ; i < 10 ; i++){
    EEPROM.get( (i * sizeof(struct Tcommand)) - 1, CRCvalue);
    Serial.println(CRCvalue,HEX);
  }
}

void loop() {
}

byte CRC8(const byte *data, size_t dataLength)
{
  byte crc = 0x00;
  while (dataLength--) 
  {
    byte extract = *data++;
    for (byte tempI = 8; tempI; tempI--)
   {
      byte sum = (crc ^ extract) & 0x01;
      crc >>= 1;
      if (sum)
     {
        crc ^= 0x8C;
      }
      extract >>= 1;
    }
  }
  return crc;
}