File content as of revision 5:fb15c35d1e28:

// WIZ820ioInterface.cpp 2013/4/5
#include "WIZ820ioInterface.h"
#include "DHCPClient.h"

WIZ820ioInterface::WIZ820ioInterface(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset) :
    WIZ820io(mosi, miso, sclk, cs, reset)
{
    ip_set = false;
}

WIZ820ioInterface::WIZ820ioInterface(SPI* spi, PinName cs, PinName reset) :
    WIZ820io(spi, cs, reset)
{
    ip_set = false;
}

int WIZ820ioInterface::init()
{
    dhcp = true;
    reset();
    return 0;
}

int WIZ820ioInterface::init(const char* ip, const char* mask, const char* gateway)
{
    dhcp = false;
    this->ip = str_to_ip(ip);
    strcpy(ip_string, ip);
    ip_set = true;
    this->netmask = str_to_ip(mask);
    this->gateway = str_to_ip(gateway);
    reset();
    return 0;
}

int WIZ820ioInterface::connect()
{
    if (dhcp) {
        int r = IPrenew();
        if (r < 0) {
            return r;
        }
    }
    return join();
}

int WIZ820ioInterface::disconnect()
{
    return WIZ820io::disconnect();
}

char* WIZ820ioInterface::getIPAddress()
{
    uint32_t ip = reg_rd<uint32_t>(SIPR);
    snprintf(ip_string, sizeof(ip_string), "%d.%d.%d.%d", (ip>>24)&0xff,(ip>>16)&0xff,(ip>>8)&0xff,ip&0xff); 
    ip_set = true;
    return ip_string;
}

int WIZ820ioInterface::IPrenew(int timeout_ms)
{
    printf("DHCP Started, waiting for IP...\n");  
    DHCPClient dhcp;
    int err = dhcp.setup(timeout_ms);
    if (err == (-1)) {
        printf("Timeout.\n");
        return -1;
    }
    printf("Connected, IP: %d.%d.%d.%d\n", dhcp.yiaddr[0], dhcp.yiaddr[1], dhcp.yiaddr[2], dhcp.yiaddr[3]);
    ip      = (dhcp.yiaddr[0]<<24) | (dhcp.yiaddr[1]<<16) | (dhcp.yiaddr[2]<<8) | dhcp.yiaddr[3];
    gateway = (dhcp.gateway[0]<<24) | (dhcp.gateway[1]<<16) | (dhcp.gateway[2]<<8) | dhcp.gateway[3];
    netmask = (dhcp.netmask[0]<<24) | (dhcp.netmask[1]<<16) | (dhcp.netmask[2]<<8) | dhcp.netmask[3];
    dnsaddr = (dhcp.dnsaddr[0]<<24) | (dhcp.dnsaddr[1]<<16) | (dhcp.dnsaddr[2]<<8) | dhcp.dnsaddr[3];
    return 0;
}