尝试通过以太网电缆将Intel Galileo连接到C#

时间:2014-07-24 18:51:22

标签: c# arduino udp ethernet intel-galileo

我在Windows 7上使用VS2012,它通过以太网连接到我的英特尔Galileo,其草图上传了Arduino 1.5.3。我的最终目标是通过以太网电缆控制电机,但我不能在两个程序之间建立简单的连接。 我没有以太网或Udp或任何网络的经验,所以请详细说明不合理的金额。

这是我在c#上的代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace TemperatureArduinoReader
{
static class Program
{

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]

    static void Main()
    {
        byte[] packetData = System.Text.ASCIIEncoding.ASCII.GetBytes("hello World");


        string IP = "192.168.1.177";
            //"127.0.0.1";
        int port = 8888;


        IPEndPoint ep = new IPEndPoint(IPAddress.Parse(IP), port);
        Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);


        client.SendTo(packetData, ep);

    }
}
}

这是我在Arduino上的代码,取自arduino webstite:

#include <SPI.h>         // needed for Arduino versions later than 0018
#include <Ethernet.h>
#include <EthernetUdp.h>         // UDP library from: bjoern@cs.stanford.edu 12/30/2008


byte mac[] = { 0X98 , 0x4F, 0xEE, 0x01, 0x54, 0xB3};
IPAddress ip(192,168,1,177);
unsigned int localPort = 8888;      




char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
char  ReplyBuffer[] = "acknowledged";       // a string to send back
// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;


void setup() {
// start the Ethernet and UDP:
Ethernet.begin(mac,ip);
Udp.begin(localPort);


Serial.begin(9600);
}


void loop() {
// if there's data available, read a packet
int packetSize = Udp.parsePacket();
if(packetSize)
{
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remote = Udp.remoteIP();
for (int i =0; i < 4; i++)
{
  Serial.print(remote[i], DEC);
  if (i < 3)
  {
    Serial.print(".");
  }
}
Serial.print(", port ");
Serial.println(Udp.remotePort());


// read the packet into packetBufffer
Udp.read(packetBuffer,UDP_TX_PACKET_MAX_SIZE);
Serial.println("Contents:");
Serial.println(packetBuffer);


// send a reply, to the IP address and port that sent us the packet we received
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write(ReplyBuffer);
Udp.endPacket();
}
delay(10);
}

首先,我将草图上传到Galileo,然后打开Serial,然后运行c#程序,但Serial中没有任何内容。

我一直在撞墙试图解决这个问题几天。我尝试了不同的IP地址和其他所有组合,现在我正在寻找你的帮助。

谢谢,Mark

1 个答案:

答案 0 :(得分:1)

我认为您在Windows系统和Galileo之间的IP地址解析存在问题。 当我将Galileo直接插入我的Windows笔记本电脑时,我得到了一个与未分配的子网相关的IP地址,例如169.254.151.131。

因此,如果我将一个IP地址(如192.168.1.177)分配给我的Galileo,我的Windows系统将无法与之通信。在我的Galileo上,当我直接连接到笔记本电脑时询问以太网DHCP地址时,我会得到一个IP地址,例如169.254.246.246。所以我的Windows系统可以与我的Galileo对话,并将草图发送到草图。

我的建议是检查Windows系统和Galileo的IP地址,以确保它们可以相互连接。

包括我曾经与伽利略谈过的草图。

/*
  UDPSendReceive

 This sketch receives UDP message strings, prints them to the serial port
 and sends an "acknowledge" string back to the sender

 A Processing sketch is included at the end of file that can be used to send 
 and received messages for testing with a computer.

 created 21 Aug 2010
 by Michael Margolis

 This code is in the public domain.

 */


#include <SPI.h>          // needed for Arduino versions later than 0018
#include <Ethernet.h>
#include <EthernetUdp.h>  // UDP library from: bjoern@cs.stanford.edu 12/30/2008


// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 0x98, 0x4f, 0xeE, 0x00, 0x23, 0xb9 };
unsigned int localPort = 8888;              // local port to listen on

// buffers for receiving and sending data
char packetBuffer[UDP_TX_PACKET_MAX_SIZE];  //buffer to hold incoming packet,
char  ReplyBuffer[] = "acknowledged";       // a string to send back

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;

void setup() {
  Serial.begin(9600);
  delay(5000);
  Serial.println("Ready");
  // get an IP address from DHCP server, if there isn't a DHCP server on the network
  // an address such as 169.254.246.246 will be assigned
  if (Ethernet.begin(mac) == 1) {
    Serial.println("Ethernet.begin() succeeded!");
    Serial.print("IP:      "); 
    Serial.println(Ethernet.localIP());
    Serial.print("Subnet:  "); 
    Serial.println(Ethernet.subnetMask());
    Serial.print("Gateway: "); 
    Serial.println(Ethernet.gatewayIP());
    Serial.print("DNS:     "); 
    Serial.println(Ethernet.dnsServerIP());
  } else {
    Serial.println("Failed to initialize Ethernet");
    while(1);
  }
  Udp.begin(localPort);
  Serial.println("Listening to UDP port 8888");

}

void loop() {
  // if there's data available, read a packet
  int packetSize = Udp.parsePacket();
  if(packetSize)
  {
    Serial.print("Received packet of size ");
    Serial.println(packetSize);
    Serial.print("From ");
    IPAddress remote = Udp.remoteIP();
    for (int i =0; i < 4; i++)
    {
      Serial.print(remote[i], DEC);
      if (i < 3)
      {
        Serial.print(".");
      }
    }
    Serial.print(", port ");
    Serial.println(Udp.remotePort());

    // read the packet into packetBufffer
    Udp.read(packetBuffer,UDP_TX_PACKET_MAX_SIZE);
    Serial.println("Contents:");
    Serial.println(packetBuffer);

    // send a reply, to the IP address and port that sent us the packet we received
    Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
    Udp.write(ReplyBuffer);
    Udp.endPacket();
  }
  delay(10);
}

/*
  A sample perl script to send a UDP message to above Galileo sketch
  #!/usr/bin/perl -w
  use strict;
  use IO::Socket::INET;
  # change PeerAddr to match what the Galileo sketch reports back
  my $sendSocket = new IO::Socket::INET(PeerAddr=>'169.254.246.246', 
                        PeerPort=>8888, 
                        Proto => 'udp', 
                        Timeout=>1) or die('Error creating UDP socket');
  my $data = "Hello Galileo!";
  print $sendSocket $data;

*/

以下是我的串口监视器输出

Ready
Ethernet.begin() succeeded!
IP:      169.254.246.246
Subnet:  255.255.  0.  0
Gateway: 255.255.255.255
DNS:     255.255.255.255
Listening to UDP port 8888
Received packet of size 14
From 255.255.255.255, port 0
Contents:
Hello Galileo!

请注意,远程系统的IP地址显示为255.255.255.255,端口0,因此草图将无法发回UDP回复数据包。我还没想出这个部分。请与https://communities.intel.com/community/makers/content核对,了解他们是否有解决方法。

另请注意,我使用perl与Galileo交谈,而不是C#。不过应该不是问题。我对C#并不熟悉。