我在Windows 7上使用VS2012，它通过以太网连接到我的英特尔伽利略，其草图是用Arduino 1.5.3上传的。我的最终目标是通过以太网电缆控制电机，但我无法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数量。
下面是我的c#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);
}
}
}
这是我的Arduino代码，取自Arduino网站:
#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，但是Serial中没有显示任何内容。
这几天我一直在绞尽脑汁想弄明白这个问题。我已经尝试了不同的IP地址组合和其他一切，现在我正在寻求你的帮助。
谢谢,马克
我认为您在Windows系统和您的Galileo之间的IP地址解析方面有问题。当我将Galileo直接插入我的Windows笔记本电脑时，我得到一个与未分配子网(如169.254.151.131)相关联的IP地址。
因此，如果我给我的Galileo分配一个IP地址，例如192.168.1.177，我的Windows系统将无法与它通信。在我的Galileo上，当我在直接连接到我的笔记本电脑时请求一个以太网DHCP地址时，我将得到一个IP地址，如169.254.246.246。因此，我的Windows系统可以与我的伽利略通信，并向草图发送UDP数据包。
我的建议是检查你的Windows系统和你的伽利略系统的IP地址，以确保它们可以相互连接。
包括我用来与伽利略交谈的草图。
/*
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;
*/
下面是串口监视器
的输出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，因此草图将无法发送回UDP应答包。这部分我还没想好。查看https://communities.intel.com/community/makers/content，看看他们是否有解决办法。
还请注意，我是用perl而不是c#来与Galileo对话的。这应该不是问题。我对c#不太熟悉。