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// Example of EtherCard usage, contributed by Will Rose, 2012-07-05.
 
#include <EtherCard.h>
 
#define BUF_SIZE 512
 
byte mac[] = { 0x00, 0x04, 0xA3, 0x21, 0xCA, 0x38 };   // Nanode MAC address.
 
uint8_t ip[] = { 172, 19, 15, 100 };          // The fallback board address.
uint8_t dns[] = { 172, 19, 15, 254 };        // The DNS server address.
uint8_t gateway[] = { 172, 19, 15, 254 };    // The gateway router address.
uint8_t subnet[] = { 255, 255, 255, 0 };    // The subnet mask.
byte Ethernet::buffer[BUF_SIZE];
byte fixed;                                 // Address fixed, no DHCP
 
void setup(void)
{
    Serial.begin(57600);
    delay(2000);
 
    /* Check that the Ethernet controller exists */
    Serial.println("Initialising the Ethernet controller");
    if (ether.begin(sizeof Ethernet::buffer, mac, 53) == 0) {
        Serial.println( "Ethernet controller NOT initialised");
        while (true)
            /* MT */ ;
    }
 
    /* Get a DHCP connection */
    Serial.println("Attempting to get an IP address using DHCP");
    fixed = false;
    if (ether.dhcpSetup()) {
        ether.printIp("Got an IP address using DHCP: ", ether.myip);
    }
    /* If DHCP fails, start with a hard-coded address */
    else {
        ether.staticSetup(ip, gateway, dns);
        ether.printIp("DHCP FAILED, using fixed address: ", ether.myip);
        fixed = true;
    }
 
    return;
}
 
void loop(void)
{
    word rc;
 
    /* These function calls are required if ICMP packets are to be accepted */
    rc = ether.packetLoop(ether.packetReceive());
    Serial.print("ether.packetLoop() returned ");
    Serial.println(rc, DEC);
 
    // For debugging
    delay(5000);
 
    return;
}