#include <stdint.h>
  
  #include "ethernet.h"
  #include "w5100.h"
  
  /** Function for Ethernet hardware **/
  
  void ethernet_init(uint8_t *mac,uint8_t *ip,uint8_t *gateway,uint8_t *mask){
  iinchip_init();
  sysinit(0x55,0x55);
  setSHAR(mac);
  setSIPR(ip);
  setGAR(gateway);
  setSUBR(mask);
  }