Fork of original library, increased Tx buffer to 16kB

Dependents:   W5500-SNTPClient-example

Files at this revision

API Documentation at this revision

Comitter:
star297
Date:
Thu May 02 20:47:25 2019 +0000
Commit message:
First commit

Changed in this revision

DHCPClient/DHCPClient.cpp Show annotated file Show diff for this revision Revisions of this file
DHCPClient/DHCPClient.h Show annotated file Show diff for this revision Revisions of this file
DNSClient/DNSClient.cpp Show annotated file Show diff for this revision Revisions of this file
DNSClient/DNSClient.h Show annotated file Show diff for this revision Revisions of this file
DNSClient/dnsname.h Show annotated file Show diff for this revision Revisions of this file
DNSClient/pico_string.h Show annotated file Show diff for this revision Revisions of this file
EthernetInterface.cpp Show annotated file Show diff for this revision Revisions of this file
EthernetInterface.h Show annotated file Show diff for this revision Revisions of this file
Socket/Endpoint.cpp Show annotated file Show diff for this revision Revisions of this file
Socket/Endpoint.h Show annotated file Show diff for this revision Revisions of this file
Socket/Socket.cpp Show annotated file Show diff for this revision Revisions of this file
Socket/Socket.h Show annotated file Show diff for this revision Revisions of this file
Socket/TCPSocketConnection.cpp Show annotated file Show diff for this revision Revisions of this file
Socket/TCPSocketConnection.h Show annotated file Show diff for this revision Revisions of this file
Socket/TCPSocketServer.cpp Show annotated file Show diff for this revision Revisions of this file
Socket/TCPSocketServer.h Show annotated file Show diff for this revision Revisions of this file
Socket/UDPSocket.cpp Show annotated file Show diff for this revision Revisions of this file
Socket/UDPSocket.h Show annotated file Show diff for this revision Revisions of this file
WIZnet/W5500.cpp Show annotated file Show diff for this revision Revisions of this file
WIZnet/W5500.h Show annotated file Show diff for this revision Revisions of this file
WIZnet/wiznet.h Show annotated file Show diff for this revision Revisions of this file
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHCPClient/DHCPClient.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,211 @@
+// DHCPClient.cpp 2013/4/10
+#include "mbed.h"
+#include "mbed_debug.h"
+#include "UDPSocket.h"
+#include "DHCPClient.h"
+
+#define DBG_DHCP 0
+
+#if DBG_DHCP
+#define DBG(...) do{debug("[%s:%d]", __PRETTY_FUNCTION__,__LINE__);debug(__VA_ARGS__);} while(0);
+#define DBG_HEX(A,B) do{debug("[%s:%d]\r\n", __PRETTY_FUNCTION__,__LINE__);debug_hex(A,B);} while(0);
+#else
+#define DBG(...) while(0);
+#define DBG_HEX(A,B) while(0);
+#endif
+
+int DHCPClient::discover()
+{
+    m_pos = 0;
+    const uint8_t header[] = {0x01,0x01,0x06,0x00};
+    add_buf((uint8_t*)header, sizeof(header));
+    uint32_t x = time(NULL) + rand();
+    xid[0] = x>>24; xid[1] = x>>16; xid[2] = x>>8; xid[3] = x;
+    add_buf(xid, 4);
+    fill_buf(20, 0x00);
+    add_buf(chaddr, 6);
+    fill_buf(10+192, 0x00);
+    const uint8_t options[] = {0x63,0x82,0x53,0x63, // magic cookie
+                               53,1,DHCPDISCOVER,   // DHCP option 53: DHCP Discover
+                               55,4,1,3,15,6,
+                               255}; 
+    add_buf((uint8_t*)options, sizeof(options));
+    return m_pos;
+}
+
+int DHCPClient::request()
+{
+    m_pos = 0;
+    const uint8_t header[] = {0x01,0x01,0x06,0x00};
+    add_buf((uint8_t*)header, sizeof(header));
+    add_buf(xid, 4);
+    fill_buf(12, 0x00);
+    add_buf(siaddr, 4);
+    fill_buf(4, 0x00); // giaddr
+    add_buf(chaddr, 6);
+    fill_buf(10+192, 0x00);
+    const uint8_t options[] = {0x63,0x82,0x53,0x63, // magic cookie
+                               53,1,DHCPREQUEST,    // DHCP option 53: DHCP Request
+                               55,4,1,3,15,6,       // DHCP option 55:
+                               };
+    add_buf((uint8_t*)options, sizeof(options));
+    add_option(50, yiaddr, 4);
+    add_option(54, siaddr, 4);
+    add_option(255);
+    return m_pos;
+}
+
+int DHCPClient::offer(uint8_t buf[], int size) {
+    memcpy(yiaddr, buf+DHCP_OFFSET_YIADDR, 4);   
+    memcpy(siaddr, buf+DHCP_OFFSET_SIADDR, 4);   
+    uint8_t *p;
+    int msg_type = -1;
+    p = buf + DHCP_OFFSET_OPTIONS;
+    while(*p != 255 && p < (buf+size)) {
+        uint8_t code = *p++;
+        if (code == 0) { // Pad Option
+            continue;
+        }
+        int len = *p++;
+ 
+        DBG("DHCP option: %d\r\n", code);
+        DBG_HEX(p, len);
+
+        switch(code) {
+            case 53:
+                msg_type = *p;
+                break;
+            case 1:
+                memcpy(netmask, p, 4); // Subnet mask address
+                break;
+            case 3:
+                memcpy(gateway, p, 4); // Gateway IP address
+                break; 
+            case 6:  // DNS server
+                memcpy(dnsaddr, p, 4);
+                break;
+            case 51: // IP lease time 
+                break;
+            case 54: // DHCP server
+                memcpy(siaddr, p, 4);
+                break;
+        }
+        p += len;
+    }
+    return msg_type;
+}
+
+bool DHCPClient::verify(uint8_t buf[], int len) {
+    if (len < DHCP_OFFSET_OPTIONS) {
+        return false;
+    }
+    if (buf[DHCP_OFFSET_OP] != 0x02) {
+        return false;
+    }
+    if (memcmp(buf+DHCP_OFFSET_XID, xid, 4) != 0) {
+        return false;
+    }
+    return true;
+}
+
+void DHCPClient::callback()
+{
+    Endpoint host;
+    int recv_len = m_udp->receiveFrom(host, (char*)m_buf, sizeof(m_buf));
+    if (recv_len < 0) {
+        return;
+    }
+    if (!verify(m_buf, recv_len)) {
+        return;
+    }
+    int r = offer(m_buf, recv_len);
+    if (r == DHCPOFFER) {
+        int send_size = request();
+        m_udp->sendTo(m_server, (char*)m_buf, send_size);
+    } else if (r == DHCPACK) {
+        exit_flag = true;
+    }
+}
+
+void  DHCPClient::add_buf(uint8_t c)
+{
+    m_buf[m_pos++] = c;
+}
+
+void  DHCPClient::add_buf(uint8_t* buf, int len)
+{
+    for(int i = 0; i < len; i++) {
+        add_buf(buf[i]);
+    }
+}
+
+void DHCPClient::fill_buf(int len, uint8_t data)
+{
+    while(len-- > 0) {
+        add_buf(data);
+    }
+}
+
+void  DHCPClient::add_option(uint8_t code, uint8_t* buf, int len)
+{
+    add_buf(code);
+    if (len > 0) {
+        add_buf((uint8_t)len);
+        add_buf(buf, len);
+    }
+}
+
+int DHCPClient::setup(int timeout_ms)
+{
+    eth = WIZnet_Chip::getInstance();
+    if (eth == NULL) {
+        return -1;
+    }    
+    eth->reg_rd_mac(SHAR, chaddr);
+    int interval_ms = 5*1000; // 5000msec
+    if (timeout_ms < interval_ms) {
+        interval_ms = timeout_ms;
+    }
+    m_udp = new UDPSocket;
+    m_udp->init();
+    m_udp->set_blocking(false);
+    eth->reg_wr<uint32_t>(SIPR, 0x00000000); // local ip "0.0.0.0"
+    m_udp->bind(68); // local port
+    m_server.set_address("255.255.255.255", 67); // DHCP broadcast
+    exit_flag = false;
+    int err = 0;
+    int seq = 0;
+    int send_size;
+    while(!exit_flag) {
+        switch(seq) {
+            case 0:
+                m_retry = 0;
+                seq++;
+                break;
+            case 1:
+                send_size = discover();
+                m_udp->sendTo(m_server, (char*)m_buf, send_size);
+                m_interval.reset();
+                m_interval.start();
+                seq++;
+                break;
+            case 2:
+                callback();
+                if (m_interval.read_ms() > interval_ms) {
+                    DBG("m_retry: %d\n", m_retry);
+                    if (++m_retry >= (timeout_ms/interval_ms)) {
+                        err = -1;
+                        exit_flag = true;
+                    }
+                    seq--;
+                }
+                break;
+        }
+    }
+    DBG("m_retry: %d, m_interval: %d\n", m_retry, m_interval.read_ms());
+    delete m_udp;
+    return err;
+}
+
+DHCPClient::DHCPClient() {
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHCPClient/DHCPClient.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,54 @@
+// DHCPClient.h 2013/4/10
+#ifndef DHCPCLIENT_H
+#define DHCPCLIENT_H
+#include "wiznet.h"
+#include "UDPSocket.h"
+
+#define DHCP_OFFSET_OP 0
+#define DHCP_OFFSET_XID 4
+#define DHCP_OFFSET_YIADDR 16
+#define DHCP_OFFSET_SIADDR 20
+#define DHCP_OFFSET_OPTIONS 240
+#define DHCP_MAX_PACKET_SIZE 2000
+
+// DHCP Message Type
+#define DHCPDISCOVER 1
+#define DHCPOFFER    2
+#define DHCPREQUEST  3
+#define DHCPDECLINE  4
+#define DHCPACK      5
+#define DHCPNAK      6
+#define DHCPRELEASE  7
+#define DHCPINFORM   8
+
+class DHCPClient {
+public:
+    DHCPClient();
+    int setup(int timeout_ms = 15*1000);
+    uint8_t chaddr[6]; // MAC
+    uint8_t yiaddr[4]; // IP
+    uint8_t dnsaddr[4]; // DNS
+    uint8_t gateway[4];
+    uint8_t netmask[4];
+    uint8_t siaddr[4];
+private:
+    int discover();
+    int request();
+    int offer(uint8_t buf[], int size);
+    void add_buf(uint8_t* buf, int len);
+    void fill_buf(int len, uint8_t data = 0x00);
+    void add_buf(uint8_t c);
+    void add_option(uint8_t code, uint8_t* buf = NULL, int len = 0);
+    bool verify(uint8_t buf[], int len);
+    void callback();
+    UDPSocket* m_udp;
+    Endpoint m_server;
+    uint8_t xid[4];
+    bool exit_flag;
+    Timer m_interval;
+    int m_retry;
+    uint8_t m_buf[DHCP_MAX_PACKET_SIZE];
+    int m_pos;
+    WIZnet_Chip* eth;
+};
+#endif //DHCPCLIENT_H
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DNSClient/DNSClient.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,173 @@
+// DNSClient.cpp 2013/8/27
+#include "mbed.h"
+#include "mbed_debug.h"
+#include "DNSClient.h"
+#include "UDPSocket.h"
+#include "dnsname.h"
+#include "wiznet.h"
+
+#define DBG_DNS 0
+
+#if DBG_DNS
+#define DBG2(...) do{debug("[DNS]%p %d %s ", this,__LINE__,__PRETTY_FUNCTION__); debug(__VA_ARGS__); } while(0);
+#else
+#define DBG2(...) while(0);
+#endif
+
+DNSClient::DNSClient(const char* hostname) : m_state(MYNETDNS_START), m_udp(NULL) {
+    m_hostname = hostname;
+}
+
+DNSClient::DNSClient(Endpoint* pHost) : m_state(MYNETDNS_START), m_udp(NULL) {
+}
+
+DNSClient::~DNSClient() {
+    if (m_udp) {
+        delete m_udp;
+    }
+}
+
+void DNSClient::callback()
+{
+    uint8_t buf[512];
+    Endpoint host;
+    int len = m_udp->receiveFrom(host, (char*)buf, sizeof(buf));
+    if (len < 0) {
+        return;
+    }
+    if (memcmp(buf+0, m_id, 2) != 0) { //verify
+        return;
+    }
+    int rcode = response(buf, len);
+    if (rcode == 0) {
+        m_state = MYNETDNS_OK;
+    } else {
+        m_state = MYNETDNS_NOTFOUND;
+    }
+}
+
+int DNSClient::response(uint8_t buf[], int size) {
+    int rcode = buf[3] & 0x0f;
+    if (rcode != 0) {
+        return rcode;
+    }
+    int qdcount = buf[4]<<8|buf[5];
+    int ancount = buf[6]<<8|buf[7];
+    int pos = 12;
+    while(qdcount-- > 0) {
+        dnsname qname(buf);
+        pos = qname.decode(pos); // qname
+        pos += 4; // qtype qclass
+    }
+    while(ancount-- > 0) {
+        dnsname name(buf);
+        pos = name.decode(pos); // name
+        int type = buf[pos]<<8|buf[pos+1];
+        pos += 8; // type class TTL  
+        int rdlength = buf[pos]<<8|buf[pos+1]; pos += 2;
+        int rdata_pos = pos;
+        pos += rdlength;
+        if (type == 1) { // A record
+            ip = (buf[rdata_pos]<<24) | (buf[rdata_pos+1]<<16) | (buf[rdata_pos+2]<<8) | buf[rdata_pos+3];
+        }
+#if DBG_DNS
+        printf("%s", name.str.c_str());
+        if (type == 1) {
+            printf(" A %d.%d.%d.%d\n", 
+                buf[rdata_pos],buf[rdata_pos+1],buf[rdata_pos+2],buf[rdata_pos+3]);
+        } else if (type == 5) {
+            dnsname rdname(buf);
+            rdname.decode(rdata_pos);
+            printf(" CNAME %s\n", rdname.str.c_str());
+        } else {
+            printf(" TYPE:%d", type);
+            printfBytes(" RDATA:", &buf[rdata_pos], rdlength);
+        }
+#endif
+    }
+    return rcode;
+}
+
+int DNSClient::query(uint8_t buf[], int size, const char* hostname) {
+    const uint8_t header[] = {
+        0x00,0x00,0x01,0x00, // id=0x0000 QR=0 rd=1 opcode=0 rcode=0
+        0x00,0x01,0x00,0x00, // qdcount=1 ancount=0
+        0x00,0x00,0x00,0x00};// nscount=0 arcount=0 
+    const uint8_t tail[] = {0x00,0x01,0x00,0x01}; // qtype=A qclass=IN
+    memcpy(buf, header, sizeof(header));
+    int t = rand();
+    m_id[0] = t>>8;
+    m_id[1] = t;
+    memcpy(buf, m_id, 2); 
+    dnsname qname(buf);
+    int pos = qname.encode(sizeof(header), (char*)hostname);
+    memcpy(buf+pos, tail, sizeof(tail));
+    pos += sizeof(tail);
+    return pos;
+}
+
+void DNSClient::resolve(const char* hostname) {
+    if (m_udp == NULL) {
+        m_udp = new UDPSocket;
+    }
+    m_udp->init();
+    m_udp->set_blocking(false);
+    Endpoint server;
+    server.set_address("8.8.8.8", 53); // DNS
+    m_udp->bind(rand()&0x7fff);
+    uint8_t buf[256];                
+    int size = query(buf, sizeof(buf), hostname);
+#if DBG_DNS
+    printf("hostname:[%s]\n", hostname);
+    printHex(buf, size);
+#endif
+    m_udp->sendTo(server, (char*)buf, size);
+    m_interval.reset();
+    m_interval.start();
+}
+
+void DNSClient::poll() {
+#if DBG_DNS
+    printf("%p m_state: %d, m_udp: %p\n", this, m_state, m_udp);
+    wait_ms(400);
+#endif
+    switch(m_state) {
+        case MYNETDNS_START:
+            m_retry = 0;
+            resolve(m_hostname);
+            m_state = MYNETDNS_PROCESSING;
+            break;
+        case MYNETDNS_PROCESSING: 
+            break;
+        case MYNETDNS_NOTFOUND: 
+            break;
+        case MYNETDNS_ERROR: 
+            break;
+        case MYNETDNS_OK:
+            DBG2("m_retry=%d, m_interval=%d\n", m_retry, m_interval.read_ms());
+            break;
+    }
+    if (m_interval.read_ms() > 1000) {
+        m_interval.stop();
+        DBG2("timeout m_retry=%d\n", m_retry);
+        if (++m_retry >= 2) {
+            m_state = MYNETDNS_ERROR;
+        } else {
+            resolve(m_hostname);
+            m_state = MYNETDNS_PROCESSING;
+        }
+    }
+}
+
+bool DNSClient::lookup(const char* hostname) {
+    m_hostname = hostname;
+    m_state = MYNETDNS_START;
+    while(1) {
+        poll();
+        callback();
+        if (m_state != MYNETDNS_PROCESSING) {
+            break;
+        } 
+    }
+    return m_state == MYNETDNS_OK;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DNSClient/DNSClient.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,34 @@
+// DNSClient.h 2013/4/5
+#pragma once
+
+#include "UDPSocket.h"
+ 
+class DNSClient {
+public:
+    DNSClient(const char* hostname = NULL);
+    DNSClient(Endpoint* pHost);
+    virtual ~DNSClient();
+    bool lookup(const char* hostname = NULL);
+    uint32_t ip;
+protected:
+    void poll();
+    void callback();
+    int response(uint8_t buf[], int size);
+    int query(uint8_t buf[], int size, const char* hostname);
+    void resolve(const char* hostname);
+    uint8_t m_id[2];
+    Timer m_interval;
+    int m_retry;
+    const char* m_hostname;
+private:
+    enum MyNetDnsState
+    {
+        MYNETDNS_START,
+        MYNETDNS_PROCESSING, //Req has not completed
+        MYNETDNS_NOTFOUND,
+        MYNETDNS_ERROR,
+        MYNETDNS_OK
+    };
+    MyNetDnsState m_state;
+    UDPSocket *m_udp;
+};
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DNSClient/dnsname.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,51 @@
+// dnsname.h 2013/8/27
+#pragma once
+//#include <string>
+#include "pico_string.h"
+class dnsname {
+public:
+    uint8_t *buf;
+    pico_string str;
+    dnsname(uint8_t *s) {
+        buf = s;
+    }
+    int decode(int pos) {
+        while(1) {
+            int len = buf[pos++];
+            if (len == 0x00) {
+                break;
+            }
+            if ((len&0xc0) == 0xc0) { //compress
+                int offset = (len&0x3f)<<8|buf[pos];
+                decode(offset);
+                return pos+1;
+            }
+            if (!str.empty()) {
+                str.append(".");
+            }
+            str.append((const char*)(buf+pos), len);
+            pos += len;
+        }
+        return pos;
+    }
+
+    int encode(int pos, char* s) {
+        while(*s) {  
+            char *f = strchr(s, '.');
+            if (f == NULL) {
+                int len = strlen(s);
+                buf[pos++] = len;
+                memcpy(buf+pos, s, len);
+                pos += len;
+                break;
+            }
+            int len = f - s;
+            buf[pos++] = len;
+            memcpy(buf+pos, s, len);
+            s = f+1;
+            pos += len;
+        }
+        buf[pos++] = 0x00;
+        return pos;
+    }
+};
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DNSClient/pico_string.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,46 @@
+// pico_string.h 2013/8/27
+#pragma once
+class pico_string {
+public:
+    pico_string(){
+        _len = 0;
+        _buf = (char*)malloc(1);
+        if (_buf) {
+            _buf[0] = '\0';
+        }
+    }
+    ~pico_string() {
+        if (_buf) {
+            free(_buf);
+        }
+    }
+    bool empty() {
+        return _len == 0;
+    }
+    void append(const char* s, int len) {
+        if (_buf == NULL) {
+            return;
+        }
+        char* p = (char*)malloc(_len+len+1);
+        if (p == NULL) {
+            return;
+        }
+        memcpy(p, _buf, _len);
+        memcpy(p+_len, s, len);
+        p[_len+len] = '\0';
+        free(_buf);
+        _buf = p;
+    }
+    void append(const char* s) {
+        append(s, strlen(s));
+    }
+    char* c_str() {
+        if (_buf) {
+            return _buf;
+        }
+        return "";
+    }
+private:
+    char* _buf;
+    int _len;
+};
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EthernetInterface.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,184 @@
+// EthernetInterface for W5500 2014/8/20
+/*
+// sample usgae. 
+// copy below code block to main code.
+
+#if defined(TARGET_LPC1114)
+    SPI spi(dp2, dp1, dp6); // mosi, miso, sclk
+    EthernetInterface eth(&spi, dp25, dp26); // spi, cs, reset
+    wait(1); // 1 second for stable state
+#elif defined(TARGET_LPC1768)
+    SPI spi(p11, p12, p13); // mosi, miso, sclk
+    EthernetInterface eth(&spi, p14, p15); // spi, cs, reset
+    wait(1); // 1 second for stable state
+#elif defined(TARGET_LPC11U68)
+    SPI spi(P0_9, P0_8, P1_29); // mosi, miso, sclk
+    EthernetInterface eth(&spi, P0_2, P1_28);//, nRESET(p9); // reset pin is dummy, don't affect any pin of WIZ550io
+    spi.format(8,0); // 8bit, mode 0
+    spi.frequency(7000000); // 7MHz
+    wait(1); // 1 second for stable state
+#endif
+
+    eth.init(); //Use DHCP
+    dbg.printf("init\r\n");
+    eth.connect();
+    dbg.printf("IP address: %s\r\n", eth.getIPAddress());
+
+*/
+
+#include "EthernetInterface.h"
+#include "DHCPClient.h"
+//static char ip_string[17];
+//static uint32_t ipaddr ;
+EthernetInterface::EthernetInterface(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset) :
+        WIZnet_Chip(mosi, miso, sclk, cs, reset)
+{
+    ip_set = false;
+}
+
+EthernetInterface::EthernetInterface(SPI* spi, PinName cs, PinName reset) :
+        WIZnet_Chip(spi, cs, reset)
+{
+    ip_set = false;
+}
+
+
+int EthernetInterface::init()
+{
+    dhcp = true;
+    //
+    //for (int i =0; i < 6; i++) this->mac[i] = mac[i];
+    //
+    reset();
+    return 0;
+}
+
+int EthernetInterface::init(uint8_t * mac)
+{
+    dhcp = true;
+    //
+    for (int i =0; i < 6; i++) this->mac[i] = mac[i];
+    //
+    reset();
+    setmac();    
+    return 0;
+}
+
+// add this function, because sometimes no needed MAC address in init calling.
+int EthernetInterface::init(const char* ip, const char* mask, const char* gateway)
+{
+    dhcp = false;
+    //
+    //for (int i =0; i < 6; i++) this->mac[i] = mac[i];
+    //
+    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();
+    
+    // @Jul. 8. 2014 add code. should be called to write chip.
+    setip(); 
+    
+    return 0;
+}
+
+int EthernetInterface::init(uint8_t * mac, const char* ip, const char* mask, const char* gateway)
+{
+    dhcp = false;
+    //
+    for (int i =0; i < 6; i++) this->mac[i] = mac[i];
+    //
+    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();
+
+    // @Jul. 8. 2014 add code. should be called to write chip.
+    setmac();
+    setip();
+    
+    return 0;
+}
+
+// Connect Bring the interface up, start DHCP if needed.
+int EthernetInterface::connect()
+{
+    if (dhcp) {
+        int r = IPrenew();
+        if (r < 0) {
+            return r;
+        }
+    }
+    
+    if (WIZnet_Chip::setip() == false) return -1;
+    return 0;
+}
+
+// Disconnect Bring the interface down.
+int EthernetInterface::disconnect()
+{
+    if (WIZnet_Chip::disconnect() == false) return -1;
+    return 0;
+}
+
+/*
+void EthernetInterface::getip(void)
+{
+    //ip = 0x12345678;
+    ipaddr = reg_rd<uint32_t>(SIPR);
+    //snprintf(ip_string, sizeof(ip_string), "%d.%d.%d.%d", (ipaddr>>24)&0xff, (ipaddr>>16)&0xff, (ipaddr>>8)&0xff, ipaddr&0xff);   
+}
+*/
+char* EthernetInterface::getIPAddress()
+{
+    //Suint32_t ip = inet_getip(SIPR);//reg_rd<uint32_t>(SIPR);
+    //static uint32_t ip = getip();
+    //uint32_t ip = getip();
+    
+    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);   
+    return ip_string;
+}
+
+char* EthernetInterface::getNetworkMask()
+{
+    uint32_t ip = reg_rd<uint32_t>(SUBR);
+    snprintf(mask_string, sizeof(mask_string), "%d.%d.%d.%d", (ip>>24)&0xff, (ip>>16)&0xff, (ip>>8)&0xff, ip&0xff);
+    return mask_string;
+}
+
+char* EthernetInterface::getGateway()
+{
+    uint32_t ip = reg_rd<uint32_t>(GAR);
+    snprintf(gw_string, sizeof(gw_string), "%d.%d.%d.%d", (ip>>24)&0xff, (ip>>16)&0xff, (ip>>8)&0xff, ip&0xff);
+    return gw_string;
+}
+
+char* EthernetInterface::getMACAddress()
+{
+    uint8_t mac[6];
+    reg_rd_mac(SHAR, mac);
+    snprintf(mac_string, sizeof(mac_string), "%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+    return mac_string; 
+}
+
+int EthernetInterface::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;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EthernetInterface.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,91 @@
+// EthernetInterface for W5500 2014/8/20
+
+#pragma once
+#include "wiznet.h"
+
+ /** Interface using Wiznet W5500 chip to connect to an IP-based network
+ *
+ */
+ 
+
+class EthernetInterface: public WIZnet_Chip {
+public:
+
+    /**
+    * Constructor
+    *
+    * \param mosi mbed pin to use for SPI
+    * \param miso mbed pin to use for SPI
+    * \param sclk mbed pin to use for SPI
+    * \param cs chip select of the WIZnet_Chip
+    * \param reset reset pin of the WIZnet_Chip
+    */
+    EthernetInterface(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset);
+    EthernetInterface(SPI* spi, PinName cs, PinName reset);
+
+  /** Initialize the interface with DHCP w/o MAC address
+  * Initialize the interface and configure it to use DHCP (no connection at this point).
+  * \return 0 on success, a negative number on failure
+  */
+  int init(); //With DHCP
+  /** Initialize the interface with DHCP.
+  * Initialize the interface and configure it to use DHCP (no connection at this point).
+  * \param mac the MAC address to use
+  * \return 0 on success, a negative number on failure
+  */
+  int init(uint8_t * mac); //With DHCP
+
+  /** Initialize the interface with a static IP address without MAC.
+  * Initialize the interface and configure it with the following static configuration (no connection at this point).
+  * \param ip the IP address to use
+  * \param mask the IP address mask
+  * \param gateway the gateway to use
+  * \return 0 on success, a negative number on failure
+  */
+
+  int init(const char* ip, const char* mask, const char* gateway);
+  /** Initialize the interface with a static IP address.
+  * Initialize the interface and configure it with the following static configuration (no connection at this point).
+  * \param mac the MAC address to use
+  * \param ip the IP address to use
+  * \param mask the IP address mask
+  * \param gateway the gateway to use
+  * \return 0 on success, a negative number on failure
+  */
+  int init(uint8_t * mac, const char* ip, const char* mask, const char* gateway);
+
+  /** Connect
+  * Bring the interface up, start DHCP if needed.
+  * \return 0 on success, a negative number on failure
+  */
+  int connect();
+  
+  /** Disconnect
+  * Bring the interface down
+  * \return 0 on success, a negative number on failure
+  */
+  int disconnect();
+  
+  /** Get IP address
+  *
+  * @ returns ip address
+  */
+  char* getIPAddress();
+  char* getNetworkMask();
+  char* getGateway();
+  char* getMACAddress();
+
+  int IPrenew(int timeout_ms = 15*1000);
+    
+private:
+    char ip_string[17];
+    char mask_string[17];
+    char gw_string[17];
+    char mac_string[20];
+    bool ip_set;
+    void getip(void);
+};
+
+#include "TCPSocketConnection.h"
+#include "TCPSocketServer.h"
+#include "UDPSocket.h"
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/Endpoint.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,61 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "Socket/Socket.h"
+#include "Socket/Endpoint.h"
+//#include <cstring>
+//#include <cstdio>
+
+Endpoint::Endpoint()
+{
+    reset_address();
+}
+Endpoint::~Endpoint() {}
+
+void Endpoint::reset_address(void)
+{
+    _ipAddress[0] = '\0';
+    _port = 0;
+}
+
+int Endpoint::set_address(const char* host, const int port)
+{
+    //Resolve DNS address or populate hard-coded IP address
+    // added code for searching instance of WIZnet chip. refer from Wifly Library.
+    WIZnet_Chip* eth = WIZnet_Chip::getInstance();
+    if (eth == NULL) {
+        error("Endpoint constructor error: no WIZnet chip instance available!\r\n");
+        return -1;
+    }
+    uint32_t addr;
+    if (!eth->gethostbyname(host, &addr)) {
+        return -1;
+    }
+    snprintf(_ipAddress, sizeof(_ipAddress), "%d.%d.%d.%d", (addr>>24)&0xff, (addr>>16)&0xff, (addr>>8)&0xff, addr&0xff);
+    _port = port;
+    return 0;
+}
+
+char* Endpoint::get_address()
+{
+    return _ipAddress;
+}
+
+int   Endpoint::get_port()
+{
+    return _port;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/Endpoint.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,64 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef ENDPOINT_H
+#define ENDPOINT_H
+
+#include "wiznet.h"
+
+class UDPSocket;
+
+/**
+IP Endpoint (address, port)
+*/
+class Endpoint {
+    friend class UDPSocket;
+
+public:
+    /** IP Endpoint (address, port)
+     */
+    Endpoint(void);
+    
+    ~Endpoint(void);
+    
+    /** Reset the address of this endpoint
+     */
+    void reset_address(void);
+    
+    /** Set the address of this endpoint
+    \param host The endpoint address (it can either be an IP Address or a hostname that will be resolved with DNS).
+    \param port The endpoint port
+    \return 0 on success, -1 on failure (when an hostname cannot be resolved by DNS).
+     */
+    int  set_address(const char* host, const int port);
+    
+    /** Get the IP address of this endpoint
+    \return The IP address of this endpoint.
+     */
+    char* get_address(void);
+    
+    /** Get the port of this endpoint
+    \return The port of this endpoint
+     */
+    int get_port(void);
+
+protected:
+    char _ipAddress[16];
+    int _port;
+};
+
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/Socket.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,48 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "Socket.h"
+
+Socket::Socket() : _sock_fd(-1),_blocking(true), _timeout(1500)
+{
+    eth = WIZnet_Chip::getInstance();
+    if (eth == NULL) {
+        error("Socket constructor error: no W5500 instance available!\r\n");
+    }
+}
+
+void Socket::set_blocking(bool blocking, unsigned int timeout)
+{
+    _blocking = blocking;
+    _timeout = timeout;
+}
+
+int Socket::close()
+{
+    // add this code refer from EthernetInterface.
+    // update by Patrick Pollet
+    int res;
+    res = eth->close(_sock_fd);
+    _sock_fd = -1;
+    return (res)? 0: -1;
+}
+
+Socket::~Socket()
+{
+    close(); //Don't want to leak
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/Socket.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,59 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef SOCKET_H_
+#define SOCKET_H_
+
+#include "wiznet.h"
+
+#define htons(x) __REV16(x)
+#define ntohs(x) __REV16(x)
+#define htonl(x) __REV(x)
+#define ntohl(x) __REV(x)
+
+/** Socket file descriptor and select wrapper
+  */
+class Socket
+{
+public: 
+    /** Socket
+     */
+    Socket();
+
+    /** Set blocking or non-blocking mode of the socket and a timeout on
+        blocking socket operations
+    \param blocking  true for blocking mode, false for non-blocking mode.
+    \param timeout   timeout in ms [Default: (1500)ms].
+    */
+    void set_blocking(bool blocking, unsigned int timeout=1500);
+
+    /** Close the socket file descriptor
+     */
+    int close();
+    
+   
+    ~Socket();
+
+protected:
+    int _sock_fd;
+    bool _blocking;
+    int _timeout;
+    WIZnet_Chip* eth;
+};
+
+
+#endif /* SOCKET_H_ */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/TCPSocketConnection.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,132 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "TCPSocketConnection.h"
+#include <cstring>
+
+using std::memset;
+using std::memcpy;
+
+// not a big code.
+// refer from EthernetInterface by mbed official driver
+TCPSocketConnection::TCPSocketConnection() :
+    _is_connected(false)
+{
+}
+
+int TCPSocketConnection::connect(const char* host, const int port)
+{
+    if (_sock_fd < 0) {
+        _sock_fd = eth->new_socket();
+        if (_sock_fd < 0) {
+            return -1;
+        }
+    }
+    if (set_address(host, port) != 0) {
+        return -1;
+    }
+    if (!eth->connect(_sock_fd, get_address(), port)) {
+        return -1;
+    }
+    set_blocking(false);
+    // add code refer from EthernetInterface.
+    _is_connected = true;
+
+    return 0;
+}
+
+bool TCPSocketConnection::is_connected(void)
+{
+    // force update recent state.
+    _is_connected = eth->is_connected(_sock_fd);
+    return _is_connected;
+}
+
+int TCPSocketConnection::send(char* data, int length)
+{
+    // add to cover exception.
+    if ((_sock_fd < 0) || !_is_connected)
+        return -1;
+
+    int size = eth->wait_writeable(_sock_fd, _blocking ? -1 : _timeout);
+    if (size < 0) {
+        return -1;
+    }
+    if (size > length) {
+        size = length;
+    }
+    return eth->send(_sock_fd, data, size);
+}
+
+// -1 if unsuccessful, else number of bytes written
+int TCPSocketConnection::send_all(char* data, int length)
+{
+    int writtenLen = 0;
+    while (writtenLen < length) {
+        int size = eth->wait_writeable(_sock_fd, _blocking ? -1 : _timeout);
+        if (size < 0) {
+            return -1;
+        }
+        if (size > (length-writtenLen)) {
+            size = (length-writtenLen);
+        }
+        int ret = eth->send(_sock_fd, data + writtenLen, size);
+        if (ret < 0) {
+            return -1;
+        }
+        writtenLen += ret;
+    }
+    return writtenLen;
+}
+
+// -1 if unsuccessful, else number of bytes received
+int TCPSocketConnection::receive(char* data, int length)
+{
+    // add to cover exception.
+    if ((_sock_fd < 0) || !_is_connected)
+        return -1;
+
+    int size = eth->wait_readable(_sock_fd, _blocking ? -1 : _timeout);
+    if (size < 0) {
+        return -1;
+    }
+    if (size > length) {
+        size = length;
+    }
+    return eth->recv(_sock_fd, data, size);
+}
+
+// -1 if unsuccessful, else number of bytes received
+int TCPSocketConnection::receive_all(char* data, int length)
+{
+    int readLen = 0;
+    while (readLen < length) {
+        int size = eth->wait_readable(_sock_fd, _blocking ? -1 :_timeout);
+        if (size <= 0) {
+            break;
+        }
+        if (size > (length - readLen)) {
+            size = length - readLen;
+        }
+        int ret = eth->recv(_sock_fd, data + readLen, size);
+        if (ret < 0) {
+            return -1;
+        }
+        readLen += ret;
+    }
+    return readLen;
+}
\ No newline at end of file
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/TCPSocketConnection.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,80 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef TCPSOCKET_H
+#define TCPSOCKET_H
+
+#include "Socket/Socket.h"
+#include "Socket/Endpoint.h"
+/**
+TCP socket connection
+*/
+class TCPSocketConnection: public Socket, public Endpoint
+{
+    friend class TCPSocketServer;
+
+public:
+    /** TCP socket connection
+    */
+    TCPSocketConnection();
+
+    /** Connects this TCP socket to the server
+    \param host The host to connect to. It can either be an IP Address or a hostname that will be resolved with DNS.
+    \param port The host's port to connect to.
+    \return 0 on success, -1 on failure.
+    */
+    int connect(const char* host, const int port);
+
+    /** Check if the socket is connected
+    \return true if connected, false otherwise.
+    */
+    bool is_connected(void);
+
+    /** Send data to the remote host.
+    \param data The buffer to send to the host.
+    \param length The length of the buffer to send.
+    \return the number of written bytes on success (>=0) or -1 on failure
+     */
+    int send(char* data, int length);
+
+    /** Send all the data to the remote host.
+    \param data The buffer to send to the host.
+    \param length The length of the buffer to send.
+    \return the number of written bytes on success (>=0) or -1 on failure
+    */
+    int send_all(char* data, int length);
+
+    /** Receive data from the remote host.
+    \param data The buffer in which to store the data received from the host.
+    \param length The maximum length of the buffer.
+    \return the number of received bytes on success (>=0) or -1 on failure
+     */
+    int receive(char* data, int length);
+
+    /** Receive all the data from the remote host.
+    \param data The buffer in which to store the data received from the host.
+    \param length The maximum length of the buffer.
+    \return the number of received bytes on success (>=0) or -1 on failure
+    */
+    int receive_all(char* data, int length);
+
+private:
+    bool _is_connected;
+};
+
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/TCPSocketServer.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,96 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "TCPSocketServer.h"
+
+TCPSocketServer::TCPSocketServer() {}
+
+// Server initialization
+int TCPSocketServer::bind(int port)
+{
+    listen_port = port;
+    if (_sock_fd < 0) {
+        _sock_fd = eth->new_socket();
+        if (_sock_fd < 0) {
+            return -1;
+        }
+    }
+    // set TCP protocol
+    eth->setProtocol(_sock_fd, WIZnet_Chip::TCP);
+    // set local port
+    eth->sreg<uint16_t>(_sock_fd, Sn_PORT, port);
+    // connect the network
+    eth->scmd(_sock_fd, WIZnet_Chip::OPEN);
+    return 0;
+}
+
+int TCPSocketServer::listen(int backlog)
+{
+    if (_sock_fd < 0) {
+        return -1;
+    }
+    if (backlog != 1) {
+        return -1;
+    }
+    eth->scmd(_sock_fd, WIZnet_Chip::LISTEN);
+    return 0;
+}
+
+
+int TCPSocketServer::accept(TCPSocketConnection& connection)
+{
+    if (_sock_fd < 0) {
+        return -1;
+    }
+    Timer t;
+    t.reset();
+    t.start();
+    while(1) {
+        if (t.read_ms() > _timeout && _blocking == false) {
+            return -1;
+        }
+        if (eth->sreg<uint8_t>(_sock_fd, Sn_SR) == WIZnet_Chip::SOCK_ESTABLISHED) {
+            break;
+        }
+    }
+    uint32_t ip = eth->sreg<uint32_t>(_sock_fd, Sn_DIPR);
+    char host[16];
+    snprintf(host, sizeof(host), "%d.%d.%d.%d", (ip>>24)&0xff, (ip>>16)&0xff, (ip>>8)&0xff, ip&0xff);
+    uint16_t port = eth->sreg<uint16_t>(_sock_fd, Sn_DPORT);
+
+    // change this server socket to connection socket.
+    connection._sock_fd = _sock_fd;
+    connection._is_connected = true;
+    connection.set_address(host, port);
+
+    // and then, for the next connection, server socket should be assigned new one.
+    _sock_fd = -1; // want to assign new available _sock_fd.
+    if(bind(listen_port) < 0) {
+        // modified by Patrick Pollet
+        error("No more socket for listening, bind error");
+        return -1;
+    } else {
+        //return -1;
+        if(listen(1) < 0) {
+            // modified by Patrick Pollet
+            error("No more socket for listening, listen error");
+            return -1;
+        }
+    }
+    return 0;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/TCPSocketServer.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,56 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef TCPSOCKETSERVER_H
+#define TCPSOCKETSERVER_H
+
+#include "Socket/Socket.h"
+#include "TCPSocketConnection.h"
+
+/** TCP Server.
+  */
+class TCPSocketServer : public Socket
+{
+public:
+    /** Instantiate a TCP Server.
+    */
+    TCPSocketServer();
+
+    /** Bind a socket to a specific port.
+    \param port The port to listen for incoming connections on.
+    \return 0 on success, -1 on failure.
+    */
+    int bind(int port);
+
+    /** Start listening for incoming connections.
+    \param backlog number of pending connections that can be queued up at any
+                   one time [Default: 1].
+    \return 0 on success, -1 on failure.
+    */
+    int listen(int backlog=1);
+
+    /** Accept a new connection.
+    \param connection A TCPSocketConnection instance that will handle the incoming connection.
+    \return 0 on success, -1 on failure.
+    */
+    int accept(TCPSocketConnection& connection);
+private :
+    int listen_port;
+
+};
+
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/UDPSocket.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,109 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "UDPSocket.h"
+
+static int udp_local_port;
+
+UDPSocket::UDPSocket()
+{
+}
+// After init function, bind() should be called.
+int UDPSocket::init(void)
+{
+    if (_sock_fd < 0) {
+        _sock_fd = eth->new_socket();
+    }
+    if (eth->setProtocol(_sock_fd, WIZnet_Chip::UDP) == false) return -1;
+    return 0;
+}
+
+// Server initialization
+int UDPSocket::bind(int port)
+{
+    if (_sock_fd < 0) {
+        _sock_fd = eth->new_socket();
+        if (_sock_fd < 0) {
+            return -1;
+        }
+    }
+    // set local port
+    if (port != 0) {
+        eth->sreg<uint16_t>(_sock_fd, Sn_PORT, port);
+    } else {
+        udp_local_port++;
+        eth->sreg<uint16_t>(_sock_fd, Sn_PORT, udp_local_port);
+    }
+    // set udp protocol
+    eth->setProtocol(_sock_fd, WIZnet_Chip::UDP);
+    eth->scmd(_sock_fd, WIZnet_Chip::OPEN);
+    return 0;
+}
+
+// -1 if unsuccessful, else number of bytes written
+int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
+{
+    int size = eth->wait_writeable(_sock_fd, _blocking ? -1 : _timeout, length-1);
+    if (size < 0) {
+        return -1;
+    }
+    confEndpoint(remote);
+    int ret = eth->send(_sock_fd, packet, length);
+    return ret;
+}
+
+// -1 if unsuccessful, else number of bytes received
+int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
+{
+    uint8_t info[8];
+    int size = eth->wait_readable(_sock_fd, _blocking ? -1 : _timeout, sizeof(info));
+    if (size < 0) {
+        return -1;
+    }
+    eth->recv(_sock_fd, (char*)info, sizeof(info));
+    readEndpoint(remote, info);
+    int udp_size = info[6]<<8|info[7];
+    //TEST_ASSERT(udp_size <= (size-sizeof(info)));
+    if (udp_size > (size-sizeof(info))) {
+        return -1;
+    }
+    /* Perform Length check here to prevent buffer overrun */
+    /* fixed by Sean Newton (https://developer.mbed.org/users/SeanNewton/) */
+    if (udp_size > length) {
+        //printf("udp_size: %d\n",udp_size);
+        return -1;
+    }
+    return eth->recv(_sock_fd, buffer, udp_size);
+}
+
+void UDPSocket::confEndpoint(Endpoint & ep)
+{
+    char * host = ep.get_address();
+    // set remote host
+    eth->sreg_ip(_sock_fd, Sn_DIPR, host);
+    // set remote port
+    eth->sreg<uint16_t>(_sock_fd, Sn_DPORT, ep.get_port());
+}
+
+void UDPSocket::readEndpoint(Endpoint & ep, uint8_t info[])
+{
+    char addr[17];
+    snprintf(addr, sizeof(addr), "%d.%d.%d.%d", info[0], info[1], info[2], info[3]);
+    uint16_t port = info[4]<<8|info[5];
+    ep.set_address(addr, port);
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/UDPSocket.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,69 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef UDPSOCKET_H
+#define UDPSOCKET_H
+
+#include "Socket/Socket.h"
+#include "Socket/Endpoint.h"
+
+/**
+UDP Socket
+*/
+class UDPSocket: public Socket
+{
+
+public:
+    /** Instantiate an UDP Socket.
+    */
+    UDPSocket();
+
+    /** Init the UDP Client Socket without binding it to any specific port
+    \return 0 on success, -1 on failure.
+    */
+    int init(void);
+
+    /** Bind a UDP Server Socket to a specific port
+    \param port The port to listen for incoming connections on
+    \return 0 on success, -1 on failure.
+    */
+    int bind(int port = -1);
+
+    /** Send a packet to a remote endpoint
+    \param remote   The remote endpoint
+    \param packet   The packet to be sent
+    \param length   The length of the packet to be sent
+    \return the number of written bytes on success (>=0) or -1 on failure
+    */
+    int sendTo(Endpoint &remote, char *packet, int length);
+
+    /** Receive a packet from a remote endpoint
+    \param remote   The remote endpoint
+    \param buffer   The buffer for storing the incoming packet data. If a packet
+           is too long to fit in the supplied buffer, excess bytes are discarded
+    \param length   The length of the buffer
+    \return the number of received bytes on success (>=0) or -1 on failure
+    */
+    int receiveFrom(Endpoint &remote, char *buffer, int length);
+
+private:
+    void confEndpoint(Endpoint & ep);
+    void readEndpoint(Endpoint & ep, uint8_t info[]);
+};
+
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WIZnet/W5500.cpp	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,410 @@
+
+#include "mbed.h"
+#include "mbed_debug.h"
+#include "wiznet.h"
+#include "DNSClient.h"
+
+#ifdef USE_W5500
+
+//Debug is disabled by default
+#if 0
+#define DBG(...) do{debug("%p %d %s ", this,__LINE__,__PRETTY_FUNCTION__); debug(__VA_ARGS__); } while(0);
+//#define DBG(x, ...) debug("[W5500:DBG]"x"\r\n", ##__VA_ARGS__);
+#define WARN(x, ...) debug("[W5500:WARN]"x"\r\n", ##__VA_ARGS__);
+#define ERR(x, ...) debug("[W5500:ERR]"x"\r\n", ##__VA_ARGS__);
+#else
+#define DBG(x, ...)
+#define WARN(x, ...)
+#define ERR(x, ...)
+#endif
+
+#if 1
+#define INFO(x, ...) debug("[W5500:INFO]"x"\r\n", ##__VA_ARGS__);
+#else
+#define INFO(x, ...)
+#endif
+
+#define DBG_SPI 0
+
+WIZnet_Chip* WIZnet_Chip::inst;
+
+WIZnet_Chip::WIZnet_Chip(PinName mosi, PinName miso, PinName sclk, PinName _cs, PinName _reset):
+    cs(_cs), reset_pin(_reset)
+{
+    spi = new SPI(mosi, miso, sclk);
+    cs = 1;
+    reset_pin = 1;
+    inst = this;
+    sock_any_port = SOCK_ANY_PORT_NUM;
+}
+
+WIZnet_Chip::WIZnet_Chip(SPI* spi, PinName _cs, PinName _reset):
+    cs(_cs), reset_pin(_reset)
+{
+    this->spi = spi;
+    cs = 1;
+    reset_pin = 1;
+    inst = this;
+    sock_any_port = SOCK_ANY_PORT_NUM;
+}
+
+bool WIZnet_Chip::setmac()
+{
+
+    for (int i =0; i < 6; i++) reg_wr<uint8_t>(SHAR+i, mac[i]);
+
+    return true;
+}
+
+// Set the IP
+bool WIZnet_Chip::setip()
+{
+    reg_wr<uint32_t>(SIPR, ip);
+    reg_wr<uint32_t>(GAR, gateway);
+    reg_wr<uint32_t>(SUBR, netmask);
+    return true;
+}
+
+bool WIZnet_Chip::linkstatus()
+{
+    if ( (reg_rd<uint8_t>(PHYCFGR) & 0x01) != 0x01 )
+        return false;
+
+    return true;
+}
+
+
+bool WIZnet_Chip::setProtocol(int socket, Protocol p)
+{
+    if (socket < 0) {
+        return false;
+    }
+    sreg<uint8_t>(socket, Sn_MR, p);
+    return true;
+}
+
+bool WIZnet_Chip::connect(int socket, const char * host, int port, int timeout_ms)
+{
+    if (socket < 0) {
+        return false;
+    }
+    sreg<uint8_t>(socket, Sn_MR, TCP);
+    scmd(socket, OPEN);
+    sreg_ip(socket, Sn_DIPR, host);
+    sreg<uint16_t>(socket, Sn_DPORT, port);
+    sreg<uint16_t>(socket, Sn_PORT, new_port());
+    scmd(socket, CONNECT);
+    Timer t;
+    t.reset();
+    t.start();
+    while(!is_connected(socket)) {
+        if (t.read_ms() > timeout_ms) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool WIZnet_Chip::gethostbyname(const char* host, uint32_t* ip)
+{
+    uint32_t addr = str_to_ip(host);
+    char buf[17];
+    snprintf(buf, sizeof(buf), "%d.%d.%d.%d", (addr>>24)&0xff, (addr>>16)&0xff, (addr>>8)&0xff, addr&0xff);
+    if (strcmp(buf, host) == 0) {
+        *ip = addr;
+        return true;
+    }
+    DNSClient client;
+    if(client.lookup(host)) {
+        *ip = client.ip;
+        return true;
+    }
+    return false;
+}
+
+bool WIZnet_Chip::disconnect()
+{
+    return true;
+}
+
+bool WIZnet_Chip::is_connected(int socket)
+{
+    uint8_t tmpSn_SR;
+    tmpSn_SR = sreg<uint8_t>(socket, Sn_SR);
+    // packet sending is possible, when state is SOCK_CLOSE_WAIT.
+    if ((tmpSn_SR == SOCK_ESTABLISHED) || (tmpSn_SR == SOCK_CLOSE_WAIT)) {
+        return true;
+    }
+    return false;
+}
+
+// Reset the chip & set the buffer
+void WIZnet_Chip::reset()
+{
+    reset_pin = 1;
+    reset_pin = 0;
+    wait_us(500); // 500us (w5500)
+    reset_pin = 1;
+    wait_ms(400); // 400ms (w5500)
+
+#if defined(USE_WIZ550IO_MAC)
+    //reg_rd_mac(SHAR, mac); // read the MAC address inside the module
+#endif
+
+    //reg_wr_mac(SHAR, mac);
+
+    // set RX and TX buffer size
+    for (int socket = 0; socket < MAX_SOCK_NUM; socket++) {
+        sreg<uint8_t>(socket, Sn_RXBUF_SIZE, 2);
+        sreg<uint8_t>(socket, Sn_TXBUF_SIZE, 16);
+    }
+}
+
+
+bool WIZnet_Chip::close(int socket)
+{
+    if (socket < 0) {
+        return false;
+    }
+    // if not connected, return
+    if (sreg<uint8_t>(socket, Sn_SR) == SOCK_CLOSED) {
+        return true;
+    }
+    if (sreg<uint8_t>(socket, Sn_MR) == TCP) {
+        scmd(socket, DISCON);
+    }
+    scmd(socket, CLOSE);
+    sreg<uint8_t>(socket, Sn_IR, 0xff);
+    return true;
+}
+
+int WIZnet_Chip::wait_readable(int socket, int wait_time_ms, int req_size)
+{
+    if (socket < 0) {
+        return -1;
+    }
+    Timer t;
+    t.reset();
+    t.start();
+    while(1) {
+        //int size = sreg<uint16_t>(socket, Sn_RX_RSR);
+        int size, size2;
+        // during the reading Sn_RX_RSR, it has the possible change of this register.
+        // so read twice and get same value then use size information.
+        do {
+            size = sreg<uint16_t>(socket, Sn_RX_RSR);
+            size2 = sreg<uint16_t>(socket, Sn_RX_RSR);
+        } while (size != size2);
+
+        if (size > req_size) {
+            return size;
+        }
+        if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
+            break;
+        }
+    }
+    return -1;
+}
+
+int WIZnet_Chip::wait_writeable(int socket, int wait_time_ms, int req_size)
+{
+    if (socket < 0) {
+        return -1;
+    }
+    Timer t;
+    t.reset();
+    t.start();
+    while(1) {
+        //int size = sreg<uint16_t>(socket, Sn_TX_FSR);
+        int size, size2;
+        // during the reading Sn_TX_FSR, it has the possible change of this register.
+        // so read twice and get same value then use size information.
+        do {
+            size = sreg<uint16_t>(socket, Sn_TX_FSR);
+            size2 = sreg<uint16_t>(socket, Sn_TX_FSR);
+        } while (size != size2);
+        if (size > req_size) {
+            return size;
+        }
+        if (wait_time_ms != (-1) && t.read_ms() > wait_time_ms) {
+            break;
+        }
+    }
+    return -1;
+}
+
+int WIZnet_Chip::send(int socket, const char * str, int len)
+{
+    if (socket < 0) {
+        return -1;
+    }
+    uint16_t ptr = sreg<uint16_t>(socket, Sn_TX_WR);
+    uint8_t cntl_byte = (0x14 + (socket << 5));
+    spi_write(ptr, cntl_byte, (uint8_t*)str, len);
+    sreg<uint16_t>(socket, Sn_TX_WR, ptr + len);
+    scmd(socket, SEND);
+    uint8_t tmp_Sn_IR;
+    while (( (tmp_Sn_IR = sreg<uint8_t>(socket, Sn_IR)) & INT_SEND_OK) != INT_SEND_OK) {
+        // @Jul.10, 2014 fix contant name, and udp sendto function.
+        switch (sreg<uint8_t>(socket, Sn_SR)) {
+            case SOCK_CLOSED :
+                close(socket);
+                return 0;
+                //break;
+            case SOCK_UDP :
+                // ARP timeout is possible.
+                if ((tmp_Sn_IR & INT_TIMEOUT) == INT_TIMEOUT) {
+                    sreg<uint8_t>(socket, Sn_IR, INT_TIMEOUT);
+                    return 0;
+                }
+                break;
+            default :
+                break;
+        }
+    }
+    sreg<uint8_t>(socket, Sn_IR, INT_SEND_OK);
+
+    return len;
+}
+
+int WIZnet_Chip::recv(int socket, char* buf, int len)
+{
+    if (socket < 0) {
+        return -1;
+    }
+    uint16_t ptr = sreg<uint16_t>(socket, Sn_RX_RD);
+    uint8_t cntl_byte = (0x18 + (socket << 5));
+    spi_read(ptr, cntl_byte, (uint8_t*)buf, len);
+    sreg<uint16_t>(socket, Sn_RX_RD, ptr + len);
+    scmd(socket, RECV);
+    return len;
+}
+
+int WIZnet_Chip::new_socket()
+{
+    for(int s = 0; s < MAX_SOCK_NUM; s++) {
+        if (sreg<uint8_t>(s, Sn_SR) == SOCK_CLOSED) {
+            return s;
+        }
+    }
+    return -1;
+}
+
+uint16_t WIZnet_Chip::new_port()
+{
+    uint16_t port = rand();
+    port |= 49152;
+    return port;
+}
+
+void WIZnet_Chip::scmd(int socket, Command cmd)
+{
+    sreg<uint8_t>(socket, Sn_CR, cmd);
+    while(sreg<uint8_t>(socket, Sn_CR));
+}
+
+void WIZnet_Chip::spi_write(uint16_t addr, uint8_t cb, const uint8_t *buf, uint16_t len)
+{
+    cs = 0;
+    spi->write(addr >> 8);
+    spi->write(addr & 0xff);
+    spi->write(cb);
+    for(int i = 0; i < len; i++) {
+        spi->write(buf[i]);
+    }
+    cs = 1;
+
+#if DBG_SPI
+    debug("[SPI]W %04x(%02x %d)", addr, cb, len);
+    for(int i = 0; i < len; i++) {
+        debug(" %02x", buf[i]);
+        if (i > 16) {
+            debug(" ...");
+            break;
+        }
+    }
+    debug("\r\n");
+#endif
+}
+
+void WIZnet_Chip::spi_read(uint16_t addr, uint8_t cb, uint8_t *buf, uint16_t len)
+{
+    cs = 0;
+    spi->write(addr >> 8);
+    spi->write(addr & 0xff);
+    spi->write(cb);
+    for(int i = 0; i < len; i++) {
+        buf[i] = spi->write(0);
+    }
+    cs = 1;
+
+#if DBG_SPI
+    debug("[SPI]R %04x(%02x %d)", addr, cb, len);
+    for(int i = 0; i < len; i++) {
+        debug(" %02x", buf[i]);
+        if (i > 16) {
+            debug(" ...");
+            break;
+        }
+    }
+    debug("\r\n");
+    if ((addr&0xf0ff)==0x4026 || (addr&0xf0ff)==0x4003) {
+        wait_ms(200);
+    }
+#endif
+}
+
+uint32_t str_to_ip(const char* str)
+{
+    uint32_t ip = 0;
+    char* p = (char*)str;
+    for(int i = 0; i < 4; i++) {
+        ip |= atoi(p);
+        p = strchr(p, '.');
+        if (p == NULL) {
+            break;
+        }
+        ip <<= 8;
+        p++;
+    }
+    return ip;
+}
+
+void printfBytes(char* str, uint8_t* buf, int len)
+{
+    printf("%s %d:", str, len);
+    for(int i = 0; i < len; i++) {
+        printf(" %02x", buf[i]);
+    }
+    printf("\n");
+}
+
+void printHex(uint8_t* buf, int len)
+{
+    for(int i = 0; i < len; i++) {
+        if ((i%16) == 0) {
+            printf("%p", buf+i);
+        }
+        printf(" %02x", buf[i]);
+        if ((i%16) == 15) {
+            printf("\n");
+        }
+    }
+    printf("\n");
+}
+
+void debug_hex(uint8_t* buf, int len)
+{
+    for(int i = 0; i < len; i++) {
+        if ((i%16) == 0) {
+            debug("%p", buf+i);
+        }
+        debug(" %02x", buf[i]);
+        if ((i%16) == 15) {
+            debug("\n");
+        }
+    }
+    debug("\n");
+}
+
+#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WIZnet/W5500.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,1272 @@
+#pragma once
+
+#include "mbed.h"
+#include "mbed_debug.h"
+
+
+#define TEST_ASSERT(A) while(!(A)){debug("\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
+
+#define DEFAULT_WAIT_RESP_TIMEOUT 500
+
+
+
+#define SOCK_OK               1        ///< Result is OK about socket process.
+#define SOCK_BUSY             0        ///< Socket is busy on processing the operation. Valid only Non-block IO Mode.
+#define SOCK_FATAL            -1000    ///< Result is fatal error about socket process.
+
+#define SOCK_ERROR            0        
+#define SOCKERR_SOCKNUM       (SOCK_ERROR - 1)     ///< Invalid socket number
+#define SOCKERR_SOCKOPT       (SOCK_ERROR - 2)     ///< Invalid socket option
+#define SOCKERR_SOCKINIT      (SOCK_ERROR - 3)     ///< Socket is not initialized
+#define SOCKERR_SOCKCLOSED    (SOCK_ERROR - 4)     ///< Socket unexpectedly closed.
+#define SOCKERR_SOCKMODE      (SOCK_ERROR - 5)     ///< Invalid socket mode for socket operation.
+#define SOCKERR_SOCKFLAG      (SOCK_ERROR - 6)     ///< Invalid socket flag
+#define SOCKERR_SOCKSTATUS    (SOCK_ERROR - 7)     ///< Invalid socket status for socket operation.
+#define SOCKERR_ARG           (SOCK_ERROR - 10)    ///< Invalid argrument.
+#define SOCKERR_PORTZERO      (SOCK_ERROR - 11)    ///< Port number is zero
+#define SOCKERR_IPINVALID     (SOCK_ERROR - 12)    ///< Invalid IP address
+#define SOCKERR_TIMEOUT       (SOCK_ERROR - 13)    ///< Timeout occurred
+#define SOCKERR_DATALEN       (SOCK_ERROR - 14)    ///< Data length is zero or greater than buffer max size.
+#define SOCKERR_BUFFER        (SOCK_ERROR - 15)    ///< Socket buffer is not enough for data communication.
+
+#define SOCK_ANY_PORT_NUM  0xC000;
+
+
+#define MAX_SOCK_NUM 8
+
+#define MR        0x0000
+#define GAR       0x0001
+#define SUBR      0x0005
+#define SHAR      0x0009
+#define SIPR      0x000f
+#define INTLEVEL  0x0013
+#define IR        0x0015
+#define IMR       0x0016
+#define SIR       0x0017
+#define SIMR      0x0018
+#define RTR       0x0019
+#define RCR       0x001b
+#define PTIMER    0x001c
+#define PMAGIC    0x001d
+#define PHAR      0x001e
+#define PSID      0x0024
+#define PMRU      0x0026
+#define UIPR      0x0028
+#define UPORTR    0x002c
+#define PHYCFGR   0x002e
+#define VERSIONR  0x0039
+
+// W5500 socket register
+#define Sn_MR         0x0000
+#define Sn_CR         0x0001
+#define Sn_IR         0x0002
+#define Sn_SR         0x0003
+#define Sn_PORT       0x0004
+#define Sn_DHAR       0x0006
+#define Sn_DIPR       0x000c
+#define Sn_DPORT      0x0010
+#define Sn_MSSR       0x0012
+#define Sn_TOS        0x0015
+#define Sn_TTL        0x0016
+#define Sn_RXBUF_SIZE 0x001e
+#define Sn_TXBUF_SIZE 0x001f
+#define Sn_TX_FSR     0x0020
+#define Sn_TX_RD      0x0022
+#define Sn_TX_WR      0x0024
+#define Sn_RX_RSR     0x0026
+#define Sn_RX_RD      0x0028
+#define Sn_RX_WR      0x002a
+#define Sn_IMR        0x002c
+#define Sn_FRAG        0x002d
+#define Sn_KPALVTR    0x002f
+
+//define for Mode Register option value
+#define MR_PPPOE      0x08
+#define MR_RST        0x80
+
+//Define for Socket Command register option value
+#define Sn_CR_OPEN      0x01
+#define Sn_CR_LISTEN    0x02
+#define Sn_CR_CONNECT   0x04
+#define Sn_CR_DISCON    0x08
+#define Sn_CR_CLOSE     0x10
+#define Sn_CR_SEND      0x20
+#define Sn_CR_SEND_MAC  0x21
+#define Sn_CR_SEND_KEEP 0x22
+#define Sn_CR_RECV      0x40
+
+
+//Define for Socket Mode register option value
+#define Sn_MR_CLOSE   0x00
+#define Sn_MR_TCP     0x01
+#define Sn_MR_UDP     0x02
+#define Sn_MR_MACRAW  0x04
+#define Sn_MR_UCASTB  0x10
+#define Sn_MR_ND      0x20
+#define Sn_MR_BCASTB  0x40
+#define Sn_MR_MULTI   0x80
+
+#define Sn_IR_SENDOK                 0x10
+
+//Sn_IR values
+
+#define Sn_IR_TIMEOUT                0x08
+#define Sn_IR_RECV                   0x04
+#define Sn_IR_DISCON                 0x02
+#define Sn_IR_CON                    0x01
+
+/*
+ * SOCKET FLAG
+ */
+#define SF_ETHER_OWN           (Sn_MR_MFEN)        ///< In \ref Sn_MR_MACRAW, Receive only the packet as broadcast, multicast and own packet
+#define SF_IGMP_VER2           (Sn_MR_ND)          ///< In \ref Sn_MR_UDP with \ref SF_MULTI_ENABLE, Select IGMP version 2.   
+#define SF_TCP_NODELAY         (Sn_MR_ND)          ///< In \ref Sn_MR_TCP, Use to nodelayed ack.
+#define SF_MULTI_ENABLE        (Sn_MR_MULTI)       ///< In \ref Sn_MR_UDP, Enable multicast mode.
+#define SF_IO_NONBLOCK           0x01              ///< Socket nonblock io mode. It used parameter in \ref socket().
+#define SF_BROAD_BLOCK         (Sn_MR_BCASTB)   ///< In \ref Sn_MR_UDP or \ref Sn_MR_MACRAW, Block broadcast packet. Valid only in W5500
+#define SF_MULTI_BLOCK         (Sn_MR_MMB)      ///< In \ref Sn_MR_MACRAW, Block multicast packet. Valid only in W5500
+#define SF_IPv6_BLOCK          (Sn_MR_MIP6B)    ///< In \ref Sn_MR_MACRAW, Block IPv6 packet. Valid only in W5500
+#define SF_UNI_BLOCK           (Sn_MR_UCASTB)   ///< In \ref Sn_MR_UDP with \ref SF_MULTI_ENABLE. Valid only in W5500
+
+#define SOCK_MACRAW                  0x42
+
+
+/* PHYCFGR register value */
+#define PHYCFGR_RST                  ~(1<<7)  //< For PHY reset, must operate AND mask.
+#define PHYCFGR_OPMD                 (1<<6)   // Configre PHY with OPMDC value
+#define PHYCFGR_OPMDC_ALLA           (7<<3)
+#define PHYCFGR_OPMDC_PDOWN          (6<<3)
+#define PHYCFGR_OPMDC_NA             (5<<3)
+#define PHYCFGR_OPMDC_100FA          (4<<3)
+#define PHYCFGR_OPMDC_100F           (3<<3)
+#define PHYCFGR_OPMDC_100H           (2<<3)
+#define PHYCFGR_OPMDC_10F            (1<<3)
+#define PHYCFGR_OPMDC_10H            (0<<3)           
+#define PHYCFGR_DPX_FULL             (1<<2)
+#define PHYCFGR_DPX_HALF             (0<<2)
+#define PHYCFGR_SPD_100              (1<<1)
+#define PHYCFGR_SPD_10               (0<<1)
+#define PHYCFGR_LNK_ON               (1<<0)
+#define PHYCFGR_LNK_OFF              (0<<0)
+
+//PHY status define
+#define PHY_CONFBY_HW            0     ///< Configured PHY operation mode by HW pin
+#define PHY_CONFBY_SW            1     ///< Configured PHY operation mode by SW register   
+#define PHY_MODE_MANUAL          0     ///< Configured PHY operation mode with user setting.
+#define PHY_MODE_AUTONEGO        1     ///< Configured PHY operation mode with auto-negotiation
+#define PHY_SPEED_10             0     ///< Link Speed 10
+#define PHY_SPEED_100            1     ///< Link Speed 100
+#define PHY_DUPLEX_HALF          0     ///< Link Half-Duplex
+#define PHY_DUPLEX_FULL          1     ///< Link Full-Duplex
+#define PHY_LINK_OFF             0     ///< Link Off
+#define PHY_LINK_ON              1     ///< Link On
+#define PHY_POWER_NORM           0     ///< PHY power normal mode
+#define PHY_POWER_DOWN           1     ///< PHY power down mode 
+
+class WIZnet_Chip {
+public:
+
+    enum Protocol   { CLOSED = 0, TCP = 1, UDP = 2,};
+    enum Command    { OPEN = 0x01, LISTEN = 0x02, CONNECT = 0x04, DISCON = 0x08, CLOSE = 0x10, SEND = 0x20, \
+                        SEND_MAC = 0x21, SEND_KEEP = 0x22, RECV = 0x40, };
+    enum Interrupt  { INT_CON = 0x01, INT_DISCON = 0x02, INT_RECV = 0x04, INT_TIMEOUT = 0x08, INT_SEND_OK = 0x10,};
+
+    enum Status     { SOCK_CLOSED = 0x00, SOCK_INIT = 0x13, SOCK_LISTEN = 0x14, SOCK_SYNSENT = 0x15, SOCK_ESTABLISHED = 0x17, \
+                         SOCK_CLOSE_WAIT = 0x1c, SOCK_UDP   = 0x22, };
+
+    
+    uint16_t sock_any_port;
+     
+    /*
+    * Constructor
+    *
+    * @param spi spi class
+    * @param cs cs of the W5500
+    * @param reset reset pin of the W5500
+    */
+    WIZnet_Chip(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset);
+    WIZnet_Chip(SPI* spi, PinName cs, PinName reset);
+
+    /*
+    * Set MAC Address to W5500
+    *
+    * @return true if connected, false otherwise
+    */ 
+    bool setmac();
+
+    /*
+    * Set Network Informations (SrcIP, Netmask, Gataway)
+    *
+    * @return true if connected, false otherwise
+    */ 
+    bool setip();
+
+    /*
+    * Get Link Status
+    *
+    * @return true if Link up, false Link down
+    */
+    bool linkstatus();
+
+    /*
+    * Disconnect the connection
+    *
+    * @ returns true 
+    */
+    bool disconnect();
+
+    /*
+    * Open a tcp connection with the specified host on the specified port
+    *
+    * @param host host (can be either an ip address or a name. If a name is provided, a dns request will be established)
+    * @param port port
+    * @ returns true if successful
+    */
+    bool connect(int socket, const char * host, int port, int timeout_ms = 10*1000);
+
+    /*
+    * Set the protocol (UDP or TCP)
+    *
+    * @param p protocol
+    * @ returns true if successful
+    */
+    bool setProtocol(int socket, Protocol p);
+
+    /*
+    * Reset the W5500
+    */
+    void reset();
+   
+    int wait_readable(int socket, int wait_time_ms, int req_size = 0);
+
+    int wait_writeable(int socket, int wait_time_ms, int req_size = 0);
+
+    /*
+    * Check if a tcp link is active
+    *
+    * @returns true if successful
+    */
+    bool is_connected(int socket);
+    
+    int8_t Socket_macraw(uint8_t sn, uint16_t port, uint8_t flag)
+    {
+        //CHECK_SOCKNUM();
+                
+        if((flag & 0x06) != 0) return SOCKERR_SOCKFLAG;
+        
+        close(sn);
+        setSn_MR(sn, (Sn_MR_MACRAW | (flag & 0xF0)));
+        if(!port)
+        {
+           port = sock_any_port++;
+           if(sock_any_port == 0xFFF0) sock_any_port = SOCK_ANY_PORT_NUM;
+        }
+        setSn_PORT(sn,port); 
+        setSn_CR(sn,Sn_CR_OPEN);
+        while(getSn_CR(sn));
+        //sock_io_mode |= ((flag & SF_IO_NONBLOCK) << sn);   
+        //sock_is_sending &= ~(1<<sn);
+        //sock_remained_size[sn] = 0;
+        //sock_pack_info[sn] = 0;
+        while(getSn_SR(sn) == SOCK_CLOSED);
+        return (int8_t)sn;
+    }  
+
+    /*
+    * Close a tcp connection
+    *
+    * @ returns true if successful
+    */
+    bool close(int socket);
+
+    /*
+    * @param str string to be sent
+    * @param len string length
+    */
+    int send(int socket, const char * str, int len);
+
+    int recv(int socket, char* buf, int len);
+
+    /*
+    * Return true if the module is using dhcp
+    *
+    * @returns true if the module is using dhcp
+    */
+    bool isDHCP() {
+        return dhcp;
+    }
+
+    bool gethostbyname(const char* host, uint32_t* ip);
+
+    static WIZnet_Chip * getInstance() {
+        return inst;
+    };
+
+    int new_socket();
+    uint16_t new_port();
+    void scmd(int socket, Command cmd);
+
+    template<typename T>
+    void sreg(int socket, uint16_t addr, T data) {
+        reg_wr<T>(addr, (0x0C + (socket << 5)), data);
+    }
+
+    template<typename T>
+    T sreg(int socket, uint16_t addr) {
+        return reg_rd<T>(addr, (0x08 + (socket << 5)));
+    }
+
+    template<typename T>
+    void reg_wr(uint16_t addr, T data) {
+        return reg_wr(addr, 0x04, data);
+    }
+    
+    template<typename T>
+    void reg_wr(uint16_t addr, uint8_t cb, T data) {
+        uint8_t buf[sizeof(T)];
+        *reinterpret_cast<T*>(buf) = data;
+        for(int i = 0; i < sizeof(buf)/2; i++) { //  Little Endian to Big Endian
+            uint8_t t = buf[i];
+            buf[i] = buf[sizeof(buf)-1-i];
+            buf[sizeof(buf)-1-i] = t;
+        }
+        spi_write(addr, cb, buf, sizeof(buf));
+    }
+
+    template<typename T>
+    T reg_rd(uint16_t addr) {
+        return reg_rd<T>(addr, 0x00);
+    }
+
+    template<typename T>
+    T reg_rd(uint16_t addr, uint8_t cb) {
+        uint8_t buf[sizeof(T)];
+        spi_read(addr, cb, buf, sizeof(buf));
+        for(int i = 0; i < sizeof(buf)/2; i++) { // Big Endian to Little Endian
+            uint8_t t = buf[i];
+            buf[i] = buf[sizeof(buf)-1-i];
+            buf[sizeof(buf)-1-i] = t;
+        }
+        return *reinterpret_cast<T*>(buf);
+    }
+
+    void reg_rd_mac(uint16_t addr, uint8_t* data) {
+        spi_read(addr, 0x00, data, 6);
+    }
+
+    void reg_wr_ip(uint16_t addr, uint8_t cb, const char* ip) {
+        uint8_t buf[4];
+        char* p = (char*)ip;
+        for(int i = 0; i < 4; i++) {
+            buf[i] = atoi(p);
+            p = strchr(p, '.');
+            if (p == NULL) {
+                break;
+            }
+            p++;
+        }
+        spi_write(addr, cb, buf, sizeof(buf));
+    }
+    
+    void sreg_ip(int socket, uint16_t addr, const char* ip) {
+        reg_wr_ip(addr, (0x0C + (socket << 5)), ip);
+    }
+    
+    void reg_rd_ip_byte(uint16_t addr, uint8_t* data) {
+        spi_read(addr, 0x00, data, 4);
+    }
+    
+    void reg_wr_ip_byte(uint16_t addr, uint8_t* data) {
+        spi_write(addr, 0x04, data, 4);
+    }
+       
+/////////////////////////////////
+// Common Register I/O function //
+/////////////////////////////////
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set Mode Register
+ * @param (uint8_t)mr The value to be set.
+ * @sa getMR()
+ */
+    void setMR(uint8_t mr) {
+        reg_wr<uint8_t>(MR,mr);
+    }
+
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get Mode Register
+ * @return uint8_t. The value of Mode register.
+ * @sa setMR()
+ */
+    uint8_t getMR() {
+        return reg_rd<uint8_t>(MR);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set gateway IP address
+ * @param (uint8_t*)gar Pointer variable to set gateway IP address. It should be allocated 4 bytes.
+ * @sa getGAR()
+ */
+    void setGAR(uint8_t * gar) {
+        reg_wr_ip_byte(GAR,gar);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get gateway IP address
+ * @param (uint8_t*)gar Pointer variable to get gateway IP address. It should be allocated 4 bytes.
+ * @sa setGAR()
+ */
+    void getGAR(uint8_t * gar) { 
+        reg_rd_ip_byte(GAR,gar);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set subnet mask address
+ * @param (uint8_t*)subr Pointer variable to set subnet mask address. It should be allocated 4 bytes.
+ * @sa getSUBR()
+ */
+    void setSUBR(uint8_t * subr) {
+        reg_wr_ip_byte(SUBR, subr);
+    }
+
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get subnet mask address
+ * @param (uint8_t*)subr Pointer variable to get subnet mask address. It should be allocated 4 bytes.
+ * @sa setSUBR()
+ */
+    void getSUBR(uint8_t * subr) {
+        reg_rd_ip_byte(SUBR, subr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set local MAC address
+ * @param (uint8_t*)shar Pointer variable to set local MAC address. It should be allocated 6 bytes.
+ * @sa getSHAR()
+ */
+    void setSHAR(uint8_t * shar) {
+        reg_wr_mac(SHAR, shar);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get local MAC address
+ * @param (uint8_t*)shar Pointer variable to get local MAC address. It should be allocated 6 bytes.
+ * @sa setSHAR()
+ */
+    void getSHAR(uint8_t * shar) {
+        reg_rd_mac(SHAR, shar);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set local IP address
+ * @param (uint8_t*)sipr Pointer variable to set local IP address. It should be allocated 4 bytes.
+ * @sa getSIPR()
+ */
+    void setSIPR(uint8_t * sipr) {
+        reg_wr_ip_byte(SIPR, sipr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get local IP address
+ * @param (uint8_t*)sipr Pointer variable to get local IP address. It should be allocated 4 bytes.
+ * @sa setSIPR()
+ */
+    void getSIPR(uint8_t * sipr) {
+        reg_rd_ip_byte(SIPR, sipr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set INTLEVEL register
+ * @param (uint16_t)intlevel Value to set @ref INTLEVEL register.
+ * @sa getINTLEVEL()
+ */
+    void setINTLEVEL(uint16_t intlevel)  {
+        reg_wr<uint16_t>(INTLEVEL, intlevel); 
+    }
+
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get INTLEVEL register
+ * @return uint16_t. Value of @ref INTLEVEL register.
+ * @sa setINTLEVEL()
+ */
+    uint16_t  getINTLEVEL() { 
+        return reg_rd<uint16_t>(INTLEVEL);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref IR register
+ * @param (uint8_t)ir Value to set @ref IR register.
+ * @sa getIR()
+ */
+    void setIR(uint8_t ir) { 
+        reg_wr<uint8_t>(IR, (ir & 0xF0));
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref IR register
+ * @return uint8_t. Value of @ref IR register.
+ * @sa setIR()
+ */
+    uint8_t getIR() {
+       return reg_rd<uint8_t>(IR & 0xF0);
+    }
+    
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref IMR register
+ * @param (uint8_t)imr Value to set @ref IMR register.
+ * @sa getIMR()
+ */
+    void setIMR(uint8_t imr) {
+        reg_wr<uint8_t>(IMR, imr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref IMR register
+ * @return uint8_t. Value of @ref IMR register.
+ * @sa setIMR()
+ */
+    uint8_t getIMR() {
+        return reg_rd<uint8_t>(IMR);
+    }
+
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref SIR register
+ * @param (uint8_t)sir Value to set @ref SIR register.
+ * @sa getSIR()
+ */
+    void setSIR(uint8_t sir) {
+        reg_wr<uint8_t>(SIR, sir);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref SIR register
+ * @return uint8_t. Value of @ref SIR register.
+ * @sa setSIR()
+ */
+    uint8_t getSIR() {
+        return reg_rd<uint8_t>(SIR);
+    }
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref SIMR register
+ * @param (uint8_t)simr Value to set @ref SIMR register.
+ * @sa getSIMR()
+ */
+    void setSIMR(uint8_t simr) {
+        reg_wr<uint8_t>(SIMR, simr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref SIMR register
+ * @return uint8_t. Value of @ref SIMR register.
+ * @sa setSIMR()
+ */
+    uint8_t getSIMR() {
+        return reg_rd<uint8_t>(SIMR);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref RTR register
+ * @param (uint16_t)rtr Value to set @ref RTR register.
+ * @sa getRTR()
+ */
+    void setRTR(uint16_t rtr)   {
+        reg_wr<uint16_t>(RTR, rtr);
+    } 
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref RTR register
+ * @return uint16_t. Value of @ref RTR register.
+ * @sa setRTR()
+ */
+    uint16_t getRTR() {
+        return reg_rd<uint16_t>(RTR);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref RCR register
+ * @param (uint8_t)rcr Value to set @ref RCR register.
+ * @sa getRCR()
+ */
+    void setRCR(uint8_t rcr) {
+        reg_wr<uint8_t>(RCR, rcr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref RCR register
+ * @return uint8_t. Value of @ref RCR register.
+ * @sa setRCR()
+ */
+    uint8_t getRCR() {
+        return reg_rd<uint8_t>(RCR);
+    }
+
+//================================================== test done ===========================================================
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref PTIMER register
+ * @param (uint8_t)ptimer Value to set @ref PTIMER register.
+ * @sa getPTIMER()
+ */
+    void setPTIMER(uint8_t ptimer) { 
+        reg_wr<uint8_t>(PTIMER, ptimer);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref PTIMER register
+ * @return uint8_t. Value of @ref PTIMER register.
+ * @sa setPTIMER()
+ */
+    uint8_t getPTIMER() {
+        return reg_rd<uint8_t>(PTIMER);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref PMAGIC register
+ * @param (uint8_t)pmagic Value to set @ref PMAGIC register.
+ * @sa getPMAGIC()
+ */
+/*
+#define setPMAGIC(pmagic) \
+        WIZCHIP_WRITE(PMAGIC, pmagic)
+*/
+    void setPMAGIC(uint8_t pmagic) {
+        reg_wr<uint8_t>(PMAGIC, pmagic );
+    }
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref PMAGIC register
+ * @return uint8_t. Value of @ref PMAGIC register.
+ * @sa setPMAGIC()
+ */
+/*
+#define getPMAGIC() \
+        WIZCHIP_READ(PMAGIC)
+*/
+    uint8_t getPMAGIC(uint8_t pmagic) {
+        return reg_rd<uint8_t>(PMAGIC, pmagic);
+    }
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set PHAR address
+ * @param (uint8_t*)phar Pointer variable to set PPP destination MAC register address. It should be allocated 6 bytes.
+ * @sa getPHAR()
+ */
+    void setPHAR(uint8_t * phar) {
+        reg_wr_mac(PHAR, phar);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get local IP address
+ * @param (uint8_t*)phar Pointer variable to PPP destination MAC register address. It should be allocated 6 bytes.
+ * @sa setPHAR()
+ */
+    void getPHAR(uint8_t * phar) {
+        reg_rd_mac(PHAR, phar);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref PSID register
+ * @param (uint16_t)psid Value to set @ref PSID register.
+ * @sa getPSID()
+ */
+    void setPSID(uint16_t psid)  {
+        reg_wr<uint16_t>(PSID,   psid ); 
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref PSID register
+ * @return uint16_t. Value of @ref PSID register.
+ * @sa setPSID()
+ */
+//uint16_t getPSID(void);
+     uint16_t getPSID() { 
+        return reg_rd<uint16_t>(PSID);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref PMRU register
+ * @param (uint16_t)pmru Value to set @ref PMRU register.
+ * @sa getPMRU()
+ */
+    void setPMRU(uint16_t pmru) { 
+        reg_wr<uint16_t>(PMRU, pmru); 
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref PMRU register
+ * @return uint16_t. Value of @ref PMRU register.
+ * @sa setPMRU()
+ */
+    uint16_t getPMRU() {
+        return reg_rd<uint16_t>(PMRU);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get unreachable IP address
+ * @param (uint8_t*)uipr Pointer variable to get unreachable IP address. It should be allocated 4 bytes.
+ */
+    void getUIPR(uint8_t * uipr) {
+        reg_rd_ip_byte(UIPR,uipr);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref UPORTR register
+ * @return uint16_t. Value of @ref UPORTR register.
+ */
+    uint16_t getUPORTR() {
+        return reg_rd<uint16_t>(UPORTR);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Set @ref PHYCFGR register
+ * @param (uint8_t)phycfgr Value to set @ref PHYCFGR register.
+ * @sa getPHYCFGR()
+ */
+   void setPHYCFGR(uint8_t phycfgr) {
+        reg_wr<uint8_t>(PHYCFGR, phycfgr);
+   }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref PHYCFGR register
+ * @return uint8_t. Value of @ref PHYCFGR register.
+ * @sa setPHYCFGR()
+ */
+    uint8_t getPHYCFGR() {
+        return reg_rd<uint8_t>(PHYCFGR);
+    }
+
+/**
+ * @ingroup Common_register_access_function
+ * @brief Get @ref VERSIONR register
+ * @return uint8_t. Value of @ref VERSIONR register.
+ */
+    uint8_t getVERSIONR() {
+        return reg_rd<uint8_t>(VERSIONR);
+    }
+
+/////////////////////////////////////
+
+///////////////////////////////////
+// Socket N register I/O function //
+///////////////////////////////////
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_MR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)mr Value to set @ref Sn_MR
+ * @sa getSn_MR()
+ */
+    void setSn_MR(uint8_t sn, uint8_t mr) {
+        sreg<uint8_t>(sn, MR, mr);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_MR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_MR.
+ * @sa setSn_MR()
+ */
+    uint8_t getSn_MR(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_MR);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_CR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)cr Value to set @ref Sn_CR
+ * @sa getSn_CR()
+ */
+    void setSn_CR(uint8_t sn, uint8_t cr) {
+        sreg<uint8_t>(sn, Sn_CR, cr);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_CR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_CR.
+ * @sa setSn_CR()
+ */
+    uint8_t getSn_CR(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_CR);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_IR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)ir Value to set @ref Sn_IR
+ * @sa getSn_IR()
+ */
+    void setSn_IR(uint8_t sn, uint8_t ir) { 
+        sreg<uint8_t>(sn, Sn_IR, (ir & 0x1F));
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_IR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_IR.
+ * @sa setSn_IR()
+ */
+    uint8_t getSn_IR(uint8_t sn) {
+        return (sreg<uint8_t>(sn, Sn_IR)) & 0x1F;
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_IMR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)imr Value to set @ref Sn_IMR
+ * @sa getSn_IMR()
+ */
+    void setSn_IMR(uint8_t sn, uint8_t imr) {
+        sreg<uint8_t>(sn, Sn_IMR, (imr & 0x1F));
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_IMR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_IMR.
+ * @sa setSn_IMR()
+ */
+    uint8_t getSn_IMR(uint8_t sn) {
+        return (sreg<uint8_t>(sn, Sn_IMR)) & 0x1F;
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_SR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_SR.
+ */
+    uint8_t getSn_SR(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_SR);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_PORT register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint16_t)port Value to set @ref Sn_PORT.
+ * @sa getSn_PORT()
+ */
+    void setSn_PORT(uint8_t sn, uint16_t port)  { 
+        sreg<uint16_t>(sn, Sn_PORT, port );
+    } 
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_PORT register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_PORT.
+ * @sa setSn_PORT()
+ */
+    uint16_t getSn_PORT(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_PORT);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_DHAR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t*)dhar Pointer variable to set socket n destination hardware address. It should be allocated 6 bytes.
+ * @sa getSn_DHAR()
+ */
+    void setSn_DHAR(uint8_t sn, uint8_t * dhar) {
+        spi_write(Sn_DHAR, (0x0C + (sn << 5)), dhar, 6);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_MR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t*)dhar Pointer variable to get socket n destination hardware address. It should be allocated 6 bytes.
+ * @sa setSn_DHAR()
+ */
+    void getSn_DHAR(uint8_t sn, uint8_t * dhar) {
+        spi_read(Sn_DHAR, (0x08 + (sn << 5)), dhar, 6);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_DIPR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t*)dipr Pointer variable to set socket n destination IP address. It should be allocated 4 bytes.
+ * @sa getSn_DIPR()
+ */
+    void setSn_DIPR(uint8_t sn, uint8_t * dipr) {
+        spi_write(Sn_DIPR, (0x0C + (sn << 5)), dipr, 4);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_DIPR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t*)dipr Pointer variable to get socket n destination IP address. It should be allocated 4 bytes.
+ * @sa SetSn_DIPR()
+ */
+    void getSn_DIPR(uint8_t sn, uint8_t * dipr) {
+        spi_read(Sn_DIPR, (0x08 + (sn << 5)), dipr, 4);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_DPORT register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint16_t)dport Value to set @ref Sn_DPORT
+ * @sa getSn_DPORT()
+ */
+    void setSn_DPORT(uint8_t sn, uint16_t dport) { 
+        sreg<uint16_t>(sn, Sn_DPORT, dport);
+    } 
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_DPORT register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_DPORT.
+ * @sa setSn_DPORT()
+ */
+    uint16_t getSn_DPORT(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_DPORT);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_MSSR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint16_t)mss Value to set @ref Sn_MSSR
+ * @sa setSn_MSSR()
+ */
+    void setSn_MSSR(uint8_t sn, uint16_t mss) { 
+        sreg<uint16_t>(sn, Sn_MSSR, mss); 
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_MSSR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_MSSR.
+ * @sa setSn_MSSR()
+ */
+    uint16_t getSn_MSSR(uint16_t sn) {
+        return sreg<uint16_t>(sn, Sn_MSSR);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_TOS register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)tos Value to set @ref Sn_TOS
+ * @sa getSn_TOS()
+ */
+    void setSn_TOS(uint8_t sn, uint8_t tos) {
+        sreg<uint8_t>(sn, Sn_TOS, tos);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_TOS register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of Sn_TOS.
+ * @sa setSn_TOS()
+ */
+    uint8_t getSn_TOS(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_TOS);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_TTL register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)ttl Value to set @ref Sn_TTL
+ * @sa getSn_TTL()
+ */
+    void setSn_TTL(uint8_t sn, uint8_t ttl) {
+        sreg<uint8_t>(sn, Sn_TTL, ttl);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_TTL register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_TTL.
+ * @sa setSn_TTL()
+ */
+    uint8_t getSn_TTL(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_TTL);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_RXBUF_SIZE register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)rxbufsize Value to set @ref Sn_RXBUF_SIZE
+ * @sa getSn_RXBUF_SIZE()
+ */
+    void setSn_RXBUF_SIZE(uint8_t sn, uint8_t rxbufsize) {
+        sreg<uint8_t>(sn, Sn_RXBUF_SIZE ,rxbufsize);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_RXBUF_SIZE register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_RXBUF_SIZE.
+ * @sa setSn_RXBUF_SIZE()
+ */
+    uint8_t getSn_RXBUF_SIZE(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_RXBUF_SIZE);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_TXBUF_SIZE register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)txbufsize Value to set @ref Sn_TXBUF_SIZE
+ * @sa getSn_TXBUF_SIZE()
+ */
+    void setSn_TXBUF_SIZE(uint8_t sn, uint8_t txbufsize) {
+        sreg<uint8_t>(sn, Sn_TXBUF_SIZE, txbufsize);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_TXBUF_SIZE register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_TXBUF_SIZE.
+ * @sa setSn_TXBUF_SIZE()
+ */
+    uint8_t getSn_TXBUF_SIZE(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_TXBUF_SIZE);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_TX_FSR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_TX_FSR.
+ */
+    uint16_t getSn_TX_FSR(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_TX_FSR);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_TX_RD register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_TX_RD.
+ */
+    uint16_t getSn_TX_RD(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_TX_RD);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_TX_WR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint16_t)txwr Value to set @ref Sn_TX_WR
+ * @sa GetSn_TX_WR()
+ */
+    void setSn_TX_WR(uint8_t sn, uint16_t txwr) { 
+        sreg<uint16_t>(sn, Sn_TX_WR, txwr); 
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_TX_WR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_TX_WR.
+ * @sa setSn_TX_WR()
+ */
+    uint16_t getSn_TX_WR(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_TX_WR);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_RX_RSR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_RX_RSR.
+ */
+    uint16_t getSn_RX_RSR(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_RX_RSR);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_RX_RD register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint16_t)rxrd Value to set @ref Sn_RX_RD
+ * @sa getSn_RX_RD()
+ */
+    void setSn_RX_RD(uint8_t sn, uint16_t rxrd) { 
+        sreg<uint16_t>(sn, Sn_RX_RD, rxrd); 
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_RX_RD register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @regurn uint16_t. Value of @ref Sn_RX_RD.
+ * @sa setSn_RX_RD()
+ */
+    uint16_t getSn_RX_RD(uint8_t sn) {
+        return sreg<uint16_t>(sn, Sn_RX_RD);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_RX_WR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_RX_WR.
+ */
+    uint16_t getSn_RX_WR(uint8_t sn) { 
+        return sreg<uint16_t>(sn, Sn_RX_WR);
+    }
+
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_FRAG register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint16_t)frag Value to set @ref Sn_FRAG
+ * @sa getSn_FRAD()
+ */
+    void setSn_FRAG(uint8_t sn, uint16_t frag) { 
+        sreg<uint16_t>(sn, Sn_FRAG, frag ); 
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_FRAG register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of @ref Sn_FRAG.
+ * @sa setSn_FRAG()
+ */
+    uint16_t getSn_FRAG(uint8_t sn) { 
+        return sreg<uint16_t>(sn, Sn_FRAG);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Set @ref Sn_KPALVTR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @param (uint8_t)kpalvt Value to set @ref Sn_KPALVTR
+ * @sa getSn_KPALVTR()
+ */
+    void setSn_KPALVTR(uint8_t sn, uint8_t kpalvt) {
+        sreg<uint8_t>(sn, Sn_KPALVTR, kpalvt);
+    }
+
+/**
+ * @ingroup Socket_register_access_function
+ * @brief Get @ref Sn_KPALVTR register
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint8_t. Value of @ref Sn_KPALVTR.
+ * @sa setSn_KPALVTR()
+ */
+    uint8_t getSn_KPALVTR(uint8_t sn) {
+        return sreg<uint8_t>(sn, Sn_KPALVTR);
+    }
+
+//////////////////////////////////////
+
+/////////////////////////////////////
+// Sn_TXBUF & Sn_RXBUF IO function //
+/////////////////////////////////////
+/**  
+ * @brief Gets the max buffer size of socket sn passed as parameter.
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of Socket n RX max buffer size.
+ */
+    uint16_t getSn_RxMAX(uint8_t sn) {
+        return (getSn_RXBUF_SIZE(sn) << 10);
+    }
+
+/**  
+ * @brief Gets the max buffer size of socket sn passed as parameters.
+ * @param (uint8_t)sn Socket number. It should be <b>0 ~ 7</b>.
+ * @return uint16_t. Value of Socket n TX max buffer size.
+ */
+//uint16_t getSn_TxMAX(uint8_t sn);
+    uint16_t getSn_TxMAX(uint8_t sn) {
+        return (getSn_TXBUF_SIZE(sn) << 10);
+    }
+
+
+protected:
+    uint8_t mac[6];
+    uint32_t ip;
+    uint32_t netmask;
+    uint32_t gateway;
+    uint32_t dnsaddr;
+    bool dhcp;
+    
+    
+
+    static WIZnet_Chip* inst;
+
+    void reg_wr_mac(uint16_t addr, uint8_t* data) {
+        spi_write(addr, 0x04, data, 6);
+    }
+
+    void spi_write(uint16_t addr, uint8_t cb, const uint8_t *buf, uint16_t len);
+    void spi_read(uint16_t addr, uint8_t cb, uint8_t *buf, uint16_t len);
+    SPI* spi;
+    DigitalOut cs;
+    DigitalOut reset_pin;
+};
+
+extern uint32_t str_to_ip(const char* str);
+extern void printfBytes(char* str, uint8_t* buf, int len);
+extern void printHex(uint8_t* buf, int len);
+extern void debug_hex(uint8_t* buf, int len);
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WIZnet/wiznet.h	Thu May 02 20:47:25 2019 +0000
@@ -0,0 +1,25 @@
+
+#pragma once
+
+//#include "mbed.h"
+//#include "mbed_debug.h"
+
+#define USE_W5500
+//#define USE_W5200 // don't use this library
+//#define USE_W5100 // don't use this library
+
+#if defined(USE_W5500)
+#include "W5500.h"
+//#define USE_WIZ550IO_MAC    // want to use the default MAC address stored in the WIZ550io
+#endif
+
+/*
+// current library don't want to support old chips.
+#if defined(USE_W5200)
+#include "W5200.h"
+#endif
+
+#if defined(USE_W5100)
+#include "W5100.h"
+#endif
+*/
\ No newline at end of file