当禁用路由器上的DHCP时，以太网模块ENC28C60不会连接到Internet

Question

使用this库我尝试连接静态IP，但它没有连接到互联网。如果在路由器上启用了DHCP并删除它func createLocalConnection(port string) *net.TCPConn { addr, err := net.ResolveTCPAddr("tcp", "127.0.0.1:"+port) if err != nil { panic(err) } conn, err := net.DialTCP("tcp", nil, addr) if err != nil { panic(err) } return conn } func proxyConnection(conn *net.TCPConn) { defer conn.Close() data := make([]byte, 1) n, err := conn.Read(data) if err != nil { fmt.Println(err) return } var proxyConn *net.TCPConn if data[0] == 0x03 { // RTMP first byte. proxyConn = createLocalConnection(RTMPPort) } else { proxyConn = createLocalConnection(HTTPPort) } proxyConn.Write(data[:n]) defer proxyConn.Close() // Request loop go func() { for { data := make([]byte, 1024*1024) n, err := conn.Read(data) if err != nil { break } proxyConn.Write(data[:n]) } }() // Response loop for { data := make([]byte, 1024*1024) n, err := proxyConn.Read(data) if err != nil { break } conn.Write(data[:n]) } } func main() { listener, err := net.ListenTCP("tcp", addr) if err != nil { panic(err) } for { conn, err := listener.AcceptTCP() if err != nil { fmt.Println(err) continue } go server.ProxyConnection(conn) } } 它的工作原理。我使用arduino MEGA。静态IP经过测试并可在其他设备上运行。

问题：如何正确设置静态IP？

注意：我在这个社区发布此问题，因为它是关于代码而不是电子产品。

连接：

ether.staticSetup(myip, gwip, dnsip, netmask);

代码：

VCC -   3.3V
GND -    GND 
SCK - Pin 52
SO  - Pin 50
SI  - Pin 51
CS  - Pin 53 # Selectable with the ether.begin() function

输出：

// This is a demo of the RBBB running as webserver with the Ether Card
// 2010-05-28 <jc@wippler.nl> http://opensource.org/licenses/mit-license.php

#include <EtherCard.h>

// ethernet interface mac address, must be unique on the LAN
static byte mymac[] = { 0x74, 0x69, 0x69, 0x2D, 0x30, 0x31 };
static byte myip[] = { xxx, xxx, 216, 203 };
static byte gwip[] = { xxx, xxx, 216, 126 };
static byte dnsip[] = { 8, 8, 8, 8};
static byte netmask[] = { 255, 255, 255, 0};
byte Ethernet::buffer[500];
BufferFiller bfill;

void setup () {
  Serial.begin(9600);
  if (ether.begin(sizeof Ethernet::buffer, mymac, 53) == 0)
    Serial.println(F("Failed to access Ethernet controller"));
  ether.staticSetup(myip, gwip, dnsip, netmask);

  while (ether.clientWaitingGw())
    ether.packetLoop(ether.packetReceive());
  Serial.println("\nGateway found");
  Serial.print("ether.clientWaitingGw=");// just to test
  Serial.print(ether.clientWaitingGw());
}


void loop () {

  word len = ether.packetReceive();
  word pos = ether.packetLoop(len);

  if (pos) { // check if valid tcp data is received
    ether.httpServerReply(homePage());// send web page data
    Serial.println("\nSend web data");
  }
delay(1000);
}


static word homePage() {
  long t = millis() / 1000;
  word h = t / 3600;
  byte m = (t / 60) % 60;
  byte s = t % 60;
  bfill = ether.tcpOffset();
  bfill.emit_p(PSTR(
                 "HTTP/1.0 200 OK\r\n"
                 "Content-Type: text/html\r\n"
                 "Pragma: no-cache\r\n"
                 "\r\n"
                 "<meta http-equiv='refresh' content='1'/>"
                 "<title>RBBB server</title>"
                 "<h1>$D$D:$D$D:$D$D</h1>"),
               h / 10, h % 10, m / 10, m % 10, s / 10, s % 10);
  return bfill.position();
}

Answer 1

经过研究，循环功能的延迟导致请求超时。删除delay(1000);即可使用

使用static ip修正代码：

#include <EtherCard.h>

// ethernet interface mac address, must be unique on the LAN
static byte mymac[] = { 0x74, 0x69, 0x69, 0x2D, 0x30, 0x31 };
static byte myip[] = { xxx, xxx, 216, 203 };
static byte gwip[] = { xxx, xxx, 216, 126 };
static byte dnsip[] = { 8, 8, 8, 8};
static byte netmask[] = { 255, 255, 255, 0};
byte Ethernet::buffer[500];
BufferFiller bfill;

void setup () {
  Serial.begin(9600);
  if (ether.begin(sizeof Ethernet::buffer, mymac, 53) == 0)// 53 only on MEGA
    Serial.println(F("Failed to access Ethernet controller"));
  ether.staticSetup(myip, gwip, dnsip, netmask);

  while (ether.clientWaitingGw())
    ether.packetLoop(ether.packetReceive());
  Serial.println("\nGateway found");
  Serial.print("ether.clientWaitingGw=");// just to test
  Serial.print(ether.clientWaitingGw());
}


void loop () {

  word len = ether.packetReceive();
  word pos = ether.packetLoop(len);

  if (pos) { // check if valid tcp data is received
    ether.httpServerReply(homePage());// send web page data
    Serial.println("\nSend web data");
  }