Using I2C Protocol, Breaks SPI Protocol

Using Arduino Programming Questions
#1

ENC28J60 Ethernet module connected to SPI pins. PN532 connected to I2C pins.

Ethernet module works well with socket programming until nfc searches for a card. When updateNFC function called, ethernet module stops responding my packets that comes from my computer. I followed library to detect what code block causes this. When PN532 library trys to use Wire library the problem occurs. How can i solve this problem.

Libraries

#include <UIPEthernet.h>
#include <Wire.h>
#include <PN532_I2C.h>
#include <PN532.h>
#include <NfcAdapter.h>

PN532_I2C pn532_i2c(Wire);
NfcAdapter nfc = NfcAdapter(pn532_i2c);

EthernetUDP udp;

Setup

  Serial.begin(9600);
  delay(1000);

  Serial.print("--> Initialize NFC: ");
  Serial.println(!nfc.begin());

  Serial.print("--> Initialize Network: ");
  uint8_t mac[6] = {0x00,0x01,0x02,0x03,0x04,0x05};
  Ethernet.begin(mac, IPAddress(192,168,2,200));
  Serial.println(udp.begin(5000));

Loop

  loopCounter++;
  if(loopCounter % 250 == 0){
    updateNFC();
  }else{
    updateEthernet();
  }

Update Ethernet

// Listen a port and echo comming message...

Update NFC

  Serial.println("Scan a NFC tag...");
  if (nfc.tagPresent()){
    NfcTag tag = nfc.read();
    tag.print();
  }

An Example Output from Console

1151×724 119 KB

#2

Post ALL of your code AS ONE FILE.

Post text output AS TEXT!

#3

Library Manager doesn't have a PN532_I2C library and the Adafruit PN532 library doesn't have a PN532_I2C.h file.

Library Manager doesn't have an NfcAdapter library.

#4