EEPROM - SIMPLE READ / WRITE

/*
E E P R O M

A R D U I N O

*/



#include <EEPROM.h>
#define ep_limit 30 // change mo to para mataasan limit. 5 = (5 x 255) = 1275 (vouchers)
int epDigits = 0;
int epAddress = 10;


void setup() {
  // put your setup code here, to run once:

  epDigits = ep_read(epAddress);
  Serial.begin(9600);
}

void loop()
{
  // put your main code here, to run repeatedly:
  epDigits++;
  ep_write(epAddress, epDigits);
  Serial.println(epDigits);
  delay(1000);
}


void ep_write(int add, const int val)
{
  int v = val;
  unsigned int i;
  for (i = 0; i < ep_limit; i++) {
    if (255 < v) {
      v = v - 255;
      EEPROM.write(add, 255);
    } else {
      EEPROM.write(add, v);
      v = 0;
    }
    add++;
  }
}



int ep_read(int add)
{
  unsigned int v = 0;
  unsigned int i;
  for (i = 0; i < ep_limit; i++)
  {
    v = v + EEPROM.read(add);
    add++;
  }
  return v;
}