WIZnet / DualNetworkInterface-Basic

..

Dependencies:   ESP8266Interface WIZnetInterface_namespace mbed-src

Dual Network Interface

Some our customers want dual network interface like below. /media/uploads/SteveKim/dual-nic-2.jpg

So, I decided to implement dual network interface with ESP8266(WiFi) and WIZwiki-W7500(Ethernet).

Implementation

But, I had some troubles because of the below.

  • There is no abstract class for all network interface
  • Same header file name in two library WIZnetInterface(EthernetInterface) and ESP8266Interface
  • Same class name in two library WIZnetInterface and ESP8266Interface

If I can modify Makefile, there will be better way to solve this problem. But, I couldn't modify Makefile in mbed.

So I solved this problem using namespace. Of course, there may be another way to change all class name and file name in the library. But, I wanted to minimize the changes of original library.

First, I changed the header file name in WIZnetInterface from <*.h> to <*.hpp>.

Declaration namespace in header file

// Endpoint.hpp
namespace wiznet_space {
   class Endpoint {
       friend class UDPSocket;
       ....................
   }
}

// Socket.hpp
namespace wiznet_space {

  class Socket {
  public:
       Socket();
  ..........................
  }
}
..........................
..........................

Using namespace in source file 

// main.c
..........................

ESP8266Interface wifi(D1, D0, D2, "WizFiDemoAP","12345678",115200); // tx, rx for
wiznet_space::EthernetInterface eth;

bool InitializeWiznetEthernet()
{
    uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0xFF, 0x11, 0x22};
 
    eth.init(mac_addr, "192.168.3.102", "255.255.255.0", "192.168.3.1"); //Use DHCP

    .......................................................................................................................    
}

bool InitializeESP8266()
{   
    wifi.init();

    .......................................................................................................................    
}

int main()
{
    ....................................................................

    // Ethernet : WIZnet hardwired TCP/IP in W7500
    if ( InitializeWiznetEthernet() )
    {
        // Send TCP/IP data via Ethernet
        ProcessDataViaEthernet();
    }    
    
    // WiFi : ESP8266
    if ( InitializeESP8266() )
    {
        // Send TCP/IP data via WiFi
        ProcessDataViaWiFi();
    }

    ....................................................................
}

// ProcessDataViaEthernet.cpp
void ProcessDataViaEthernet()
{
    wiznet_space::TCPSocketConnection eth_sock;
    
    eth_sock.connect("192.168.3.64", 6000);
    char send_data[] = "This is from Ethernet Interface\r\n";
    eth_sock.send_all(send_data, sizeof(send_data)-1);
    eth_sock.close();
}

// ProcessDataViaWiFi.cpp
void ProcessDataViaWiFi()
{
    ::TCPSocketConnection wifi_sock;
    
    wifi_sock.connect("192.168.3.64", 6000);    
    char send_data[] = "This is from WiFi Interface\r\n";
    wifi_sock.send_all(send_data, sizeof(send_data)-1);
    wifi_sock.close();
}

And, here are screenshots of this test. /media/uploads/SteveKim/esd01-2.jpg /media/uploads/SteveKim/esd01-3.jpg

Conclusion

I know that this way is a kind of work-around way. Best way is to design a new network-abstract-class and hierarchical network-interface-classes based on the network-abstract-class.

  • Ethernet : lwIP, WIZnet hardwired TCP/IP
  • WiFi : ESP8266, WiFly, WizFi250, CC3000, ....
  • Other interfaces(3G/4G, BT, .....)

I believe that mbed-team will release a new network classes based on a hierarchical architecture .

Until then, you can refer to the this code for dual network interface, temporarily.

main.cpp@1:a79f264f321f, 2015-07-14 (annotated)

Committer:
SteveKim
Date:
Tue Jul 14 10:18:05 2015 +0000
Revision:
1:a79f264f321f
Parent:
0:0543bf604693 
Dual Network Interface for WIZwiki-W7500;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
SteveKim 0:0543bf604693 1 #include "mbed.h"
SteveKim 0:0543bf604693 2
SteveKim 1:a79f264f321f 3 #include "ESP8266Interface.h"
SteveKim 1:a79f264f321f 4 #include "EthernetInterface.hpp"
SteveKim 0:0543bf604693 5
SteveKim 0:0543bf604693 6 DigitalOut led1(LED1);
SteveKim 0:0543bf604693 7 DigitalOut led2(LED2);
SteveKim 1:a79f264f321f 8
SteveKim 1:a79f264f321f 9 ESP8266Interface wifi(D1, D0, D2, "WizFiDemoAP","12345678",115200); // tx, rx for
SteveKim 1:a79f264f321f 10 wiznet_space::EthernetInterface eth;
SteveKim 1:a79f264f321f 11
SteveKim 1:a79f264f321f 12 RawSerial pc(USBTX, USBRX); // tx, rx
SteveKim 1:a79f264f321f 13
SteveKim 1:a79f264f321f 14 extern void ProcessDataViaEthernet();
SteveKim 1:a79f264f321f 15 extern void ProcessDataViaWiFi();
SteveKim 1:a79f264f321f 16
SteveKim 1:a79f264f321f 17 // For monitoring data from ESP8266
SteveKim 1:a79f264f321f 18 Timeout timer_buffer_debug;
SteveKim 1:a79f264f321f 19 CircBuffer<char> buffer_ESP8266_recv(1024);
SteveKim 1:a79f264f321f 20
SteveKim 1:a79f264f321f 21 void print_buffer_ESP8266()
SteveKim 0:0543bf604693 22 {
SteveKim 1:a79f264f321f 23 char c=0;
SteveKim 1:a79f264f321f 24 while ( buffer_ESP8266_recv.available() ) {
SteveKim 1:a79f264f321f 25 buffer_ESP8266_recv.dequeue(&c);
SteveKim 1:a79f264f321f 26 pc.putc(c);
SteveKim 1:a79f264f321f 27 }
SteveKim 1:a79f264f321f 28 timer_buffer_debug.attach(&print_buffer_ESP8266, 0.1);
SteveKim 1:a79f264f321f 29 }
SteveKim 1:a79f264f321f 30
SteveKim 1:a79f264f321f 31
SteveKim 1:a79f264f321f 32 bool InitializeWiznetEthernet()
SteveKim 1:a79f264f321f 33 {
SteveKim 0:0543bf604693 34 uint8_t mac_addr[6] = {0x00, 0x08, 0xDC, 0xFF, 0x11, 0x22};
SteveKim 1:a79f264f321f 35
SteveKim 1:a79f264f321f 36 //eth.init(mac_addr); //Use DHCP
SteveKim 1:a79f264f321f 37 eth.init(mac_addr, "192.168.3.102", "255.255.255.0", "192.168.3.1"); //Use DHCP
SteveKim 0:0543bf604693 38
SteveKim 1:a79f264f321f 39 // Check Ethenret Link
SteveKim 1:a79f264f321f 40 if( eth.link()!=true )
SteveKim 1:a79f264f321f 41 {
SteveKim 1:a79f264f321f 42 printf("- Ethernet PHY Link- Fail\r\n");
SteveKim 1:a79f264f321f 43 return false;
SteveKim 1:a79f264f321f 44 }
SteveKim 1:a79f264f321f 45
SteveKim 1:a79f264f321f 46 // Start Ethernet connecting: Trying to get an IP address using DHCP
SteveKim 1:a79f264f321f 47 if ( eth.connect() < 0 ){
SteveKim 1:a79f264f321f 48 printf("Fail - Ethernet Connecing");
SteveKim 1:a79f264f321f 49 return false;
SteveKim 0:0543bf604693 50 }
SteveKim 0:0543bf604693 51
SteveKim 1:a79f264f321f 52 //pc.printf("IP Address(Ethernet Interface) is %s\r\n", eth.getIPAddress());
SteveKim 1:a79f264f321f 53
SteveKim 1:a79f264f321f 54 return true;
SteveKim 1:a79f264f321f 55 }
SteveKim 1:a79f264f321f 56
SteveKim 1:a79f264f321f 57 bool InitializeESP8266()
SteveKim 1:a79f264f321f 58 {
SteveKim 1:a79f264f321f 59 // if you don't want to monitor ESP-module-data, remove below line.
SteveKim 1:a79f264f321f 60 //timer_buffer_debug.attach(&print_buffer_ESP8266, 0.5);
SteveKim 1:a79f264f321f 61
SteveKim 1:a79f264f321f 62 wifi.init();
SteveKim 1:a79f264f321f 63
SteveKim 1:a79f264f321f 64 bool result = wifi.connect();
SteveKim 1:a79f264f321f 65 if ( !result ) {
SteveKim 1:a79f264f321f 66 pc.printf("wifi.connect error\r\n");
SteveKim 1:a79f264f321f 67 return false;
SteveKim 0:0543bf604693 68 }
SteveKim 1:a79f264f321f 69
SteveKim 1:a79f264f321f 70 //pc.printf("IP Address(WiFi Interface) is %s\r\n", wifi.getIPAddress());
SteveKim 1:a79f264f321f 71 return true;
SteveKim 1:a79f264f321f 72 }
SteveKim 1:a79f264f321f 73
SteveKim 1:a79f264f321f 74
SteveKim 1:a79f264f321f 75 int main()
SteveKim 1:a79f264f321f 76 {
SteveKim 1:a79f264f321f 77 // Initialize LED
SteveKim 1:a79f264f321f 78 for (int i=0; i<20; i++)
SteveKim 1:a79f264f321f 79 {
SteveKim 1:a79f264f321f 80 led1 = !led1;
SteveKim 1:a79f264f321f 81 led2 = !led2;
SteveKim 1:a79f264f321f 82 wait(0.05);
SteveKim 1:a79f264f321f 83 }
SteveKim 1:a79f264f321f 84
SteveKim 1:a79f264f321f 85 // Initialize UART
SteveKim 1:a79f264f321f 86 pc.baud(115200);
SteveKim 1:a79f264f321f 87 pc.printf("\r\nDual Network Interface Test.\r\n");
SteveKim 1:a79f264f321f 88
SteveKim 1:a79f264f321f 89 // Ethernet : WIZnet hardwired TCP/IP in W7500
SteveKim 1:a79f264f321f 90 if ( InitializeWiznetEthernet() )
SteveKim 1:a79f264f321f 91 {
SteveKim 1:a79f264f321f 92 ProcessDataViaEthernet();
SteveKim 1:a79f264f321f 93 pc.printf("WIZnet hardwired TCP/IP in W7500 Test Done.\r\n");
SteveKim 1:a79f264f321f 94 }
SteveKim 0:0543bf604693 95
SteveKim 1:a79f264f321f 96 // WiFi : ESP8266
SteveKim 1:a79f264f321f 97 if ( InitializeESP8266() )
SteveKim 1:a79f264f321f 98 {
SteveKim 1:a79f264f321f 99 ProcessDataViaWiFi();
SteveKim 1:a79f264f321f 100 pc.printf("ESP8266 Test Done.\r\n");
SteveKim 1:a79f264f321f 101 }
SteveKim 0:0543bf604693 102
SteveKim 0:0543bf604693 103
SteveKim 0:0543bf604693 104 while(1) {
SteveKim 1:a79f264f321f 105 wait(1);
SteveKim 0:0543bf604693 106 }
SteveKim 0:0543bf604693 107 }
SteveKim 1:a79f264f321f 108