Unable to read data written to ST25DV64KC (EEPROM) using NFC mobile app

[osamaKhalid122]

I flashed the Example02-Memory_Read_Write_Operations but I am unable to read the data from the NFC app using mobile.

I have added the following code right after opening secure I2C session. But still, no progress.

void turnRFON()
{
  uint8_t realValue = 0;
  tag.st25_io.readSingleByte(SF_ST25DV64KC_ADDRESS::SYSTEM, (const uint16_t) REG_I2C_CFG, (uint8_t*)&realValue);
  Serial.println(F("Read value 0 is"));
  tag.st25_io.writeSingleByte(SF_ST25DV64KC_ADDRESS::SYSTEM, (const uint16_t) REG_I2C_CFG, (const uint8_t)(BIT_I2C_CFG_I2C_RF_SWITCH_OFF || realValue));
  tag.st25_io.readSingleByte(SF_ST25DV64KC_ADDRESS::SYSTEM, (const uint16_t) REG_I2C_CFG, (uint8_t*)&realValue);
  Serial.println(F("Read value 1 is"));
  Serial.println(realValue);
  tag.st25_io.writeSingleByte(SF_ST25DV64KC_ADDRESS::RF_SWITCH_ON, (const uint16_t) 0, (const uint8_t)0);
}