Hello,
I have been having a problem using my Cerbuino Bee with an ENC28. I can serve up webpages fine in debug mode but cannot when I am running the Cerbuino on its own. I found this discussion:
https://www.ghielectronics.com/community/forum/topic?id=16536
which seemed to start discussing my situation but there did not seem to be a solution. Has anyone else encountered this problem?
@ Bill_Wyo -
What is firmware are you using on the board?
@ Dat - Cerbuino Bee rev 1.2 with ENC28. Firmware is 4.3.6
@ Bill_Wyo - Can you post a minimal but complete code sample that reliably reproduces the issue?
@ John - I tested this and it duplicates the problem. I have tried adding delays in different places. I can ping the device.
using System;
using System.Net;
using System.Collections;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Presentation;
using Microsoft.SPOT.Presentation.Controls;
using Microsoft.SPOT.Presentation.Media;
using Microsoft.SPOT.Presentation.Shapes;
using Microsoft.SPOT.Touch;
using Gadgeteer.Networking;
using GT = Gadgeteer;
using GTM = Gadgeteer.Modules;
using Gadgeteer.Modules.GHIElectronics;
namespace EnvironmentalMonitorSmallSample
{
public partial class Program
{
static HttpListener listener;
static string ip;
static string gateway;
static string subnet;
// This method is run when the mainboard is powered up or reset.
void ProgramStarted()
{
ip = "192.168.1.200";
gateway = "192.168.1.1";
subnet = "255.255.255.0";
ethernetENC28.NetworkUp += ethernetENC28_NetworkUp;
ethernetENC28.NetworkInterface.Open();
GT.Timer timer = new GT.Timer(60000);
timer.Tick += timer_Tick;
timer.Start();
Debug.Print("Program Started");
}
void timer_Tick(GT.Timer timer)
{
//Do something
}
void ethernetENC28_NetworkUp(GTM.Module.NetworkModule sender, GTM.Module.NetworkModule.NetworkState state)
{
CreateWebThread();
}
public static void CreateWebThread()
{
Thread httpThread = new Thread((new PrefixKeeper("http")).RunServerDelegate);
httpThread.Start();
}
class PrefixKeeper
{
private string m_Prefix;
internal PrefixKeeper(string prefix)
{
m_Prefix = prefix;
}
internal void RunServerDelegate()
{
Program.RunServer(m_Prefix);
}
}
internal static void RunServer(string prefix)
{
ethernetENC28.NetworkSettings.EnableStaticIP(ip, subnet, gateway);
while (true)
{
try
{
HttpListener listener = new HttpListener("http", 80);
listener.Start();
while (listener.IsListening)
{
try
{
HttpListenerContext context = null;
Thread.Sleep(500);
context = listener.GetContext();
if (context != null)
{
HandleRequest(context);
}
}
catch (Exception ex)
{
Debug.Print(ex.ToString());
}
}
listener.Stop();
listener.Close();
}
catch (Exception e)
{
}
}
}
private static void HandleRequest(HttpListenerContext context)
{
HttpListenerResponse response = null;
{
try
{
response = context.Response;
response.StatusCode = (int)HttpStatusCode.OK;
byte[] HTML;
HTML = System.Text.Encoding.UTF8.GetBytes(
"<html><body><p>Name: NetInfo<br />" +
"IP Address: " + ip + "<br />" +
"Gateway: " + gateway + "<br /></p>" +
"</body></html>");
response.ContentType = "text/html";
response.OutputStream.Write(HTML, 0, HTML.Length);
response.Close();
}
catch (Exception ex)
{
}
finally
{
context.Response.Close();
}
}
}
}
}
you are experiencing a timing situation. when not connected to debugger, your program starts faster.
you need to check for the IP address changing from 0.0.0.0 to the actual IP address. it takes a bit of time.
@ Mike - should I check for the ip change in the networkup event?
@ John - Mike thinks I have a timing issue. I am pretty sure he is right as that is the only reason I can think of that would create the problem I am seeing. I have put delays in several places and can ping the device. I connected a characterdisplay module so I could see where the code seemed to stop so I know it gets to - context = listener.GetContext();
I usually start a thread in the ProgramStarted method, and when I see the address change, I start the service requiring network support.
@ Mike - Hey, Thank you for the help. I will continue looking at the state of the connection to see if I can slow my code down at the right point. In the meantime I have several of these systems with code working using 4.2, I will test one of these at my home to see if it works. I may take a system in to work and see if the 4.3 code works there.
@ Bill_Wyo -
Fixed in next release.
@ Dat - Thank you. I will stick with my 4.2 code in the meantime.