Graham.fry's Content

#53239 Not able to change network settings

Posted by Graham.fry on 17 October 2013 - 12:54 PM in Netduino 2 (and Netduino 1)

I know it is not the exact answer you are looking for but if I need to use a fixed IP I get my netduino to run this line at the when it boots up.

Microsoft.SPOT.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()[0].EnableStaticIP("192.168.1.122", "255.255.255.0", "192.168.1.62");

by using this I don't need to configure each device before using I just change the IP I want to change.

#52519 A first chance exception of type 'System.InvalidOperationException' o...

Posted by Graham.fry on 03 September 2013 - 08:03 AM in Netduino Plus 2 (and Netduino Plus 1)

For anybody that cares

If you having a problem using the hardware DLL in 4.3 (with servos) you need to uninstall all 4.3 sdk's and reinstall 4.2

This fixed my problem

#52264 A first chance exception of type 'System.InvalidOperationException' o...

Posted by Graham.fry on 21 August 2013 - 02:15 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi

I am trying to get a servo working I copied this code from the internet when I run it, it fails with the following error

A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.SPOT.Hardware.dll

Any help will be appreciated

Thanks in advance

Graham

Attached is the code I am using on a netduino plus2 version 4.2.2

program.cs

using System.Threading;

using SecretLabs.NETMF.Hardware.Netduino;

using Microsoft.SPOT;

namespace MinelectricsV2

{

public class Program

{

static Servo[] servos = new Servo[4];

public static void Main()

{

//Netduino only has four PWM pins: GPIO_PIN_D5, 6, 9, and 10

servos[0] = new Servo(Pins.GPIO_PIN_D5);

servos[1] = new Servo(Pins.GPIO_PIN_D6);

servos[2] = new Servo(Pins.GPIO_PIN_D9);

servos[3] = new Servo(Pins.GPIO_PIN_D10);

while (true)

{

MoveServos(0);

MoveServos(90);

MoveServos(180);

}

private static void MoveServos(uint angle)

{

for (int i = 0; i < servos.Length; i++)

{

servos[i].Angle = angle;

}

Thread.Sleep(2000);

}

class.cs

using Microsoft.SPOT.Hardware;

using SecretLabs.NETMF.Hardware;

namespace MinelectricsV2

{

public class Servo

{

static PWM servo;

public Servo(Cpu.Pin pin)

{

servo = new PWM(pin);

servo.SetDutyCycle(dutyCycle: 0);

}

private uint _angle = 0;

public uint Angle

{

get

{

return _angle;

}

set

{

const uint degreeMin = 0;

const uint degreeMax = 180;

const uint durationMin = 500; // 480

const uint durationMax = 2300; // 2450

_angle = value;

if (_angle < degreeMin) _angle = degreeMin;

if (_angle > degreeMax) _angle = degreeMax;

uint dur = (_angle - degreeMin) * (durationMax - durationMin) / (degreeMax - degreeMin) + durationMin;

servo.SetPulse(period: 20000, duration: dur);

}

#51979 Date from netduino plus

Posted by Graham.fry on 06 August 2013 - 12:03 PM in Netduino Plus 2 (and Netduino Plus 1)

Here is the code to get time from the internet using netduino

using System;

using System.Net;

using System.Net.Sockets;

using Microsoft.SPOT;

using System.Threading;

namespace GetTime

{

public class Program

{

public static void Main()

{

var result = UpdateTimeFromNtpServer("time.nist.gov", 2); // gmt + 2

Debug.Print(result ? "Time successfully updated" : "Time not updated");

while (true)

{

Debug.Print("netduino Time is: " + DateTime.Now.ToString());//TimeClient.LocalDate.ToString());

Thread.Sleep(60000);

}

//return result;

}

public static bool UpdateTimeFromNtpServer(string server, int timeZoneOffset)

{

try

{

var currentTime = GetNtpTime(server, timeZoneOffset);

Microsoft.SPOT.Hardware.Utility.SetLocalTime(currentTime);

return true;

}

catch

{

return false;

}

private static DateTime GetNtpTime(String timeServer, int timeZoneOffset)

{

// Find endpoint for TimeServer

var ep = new IPEndPoint(Dns.GetHostEntry(timeServer).AddressList[0], 123);

// Make send/receive buffer

var ntpData = new byte[48];

// Connect to TimeServer

using (var s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))

{

// Set 10s send/receive timeout and connect

s.SendTimeout = s.ReceiveTimeout = 10000; // 10,000 ms

s.Connect(ep);

// Set protocol version

ntpData[0] = 0x1B;

// Send Request

s.Send(ntpData);

// Receive Time

s.Receive(ntpData);

// Close the socket

s.Close();

}

const byte offsetTransmitTime = 40;

ulong intpart = 0;

ulong fractpart = 0;

for (var i = 0; i <= 3; i++)

intpart = (intpart << 8) | ntpData[offsetTransmitTime + i];

for (var i = 4; i <= 7; i++)

fractpart = (fractpart << 8) | ntpData[offsetTransmitTime + i];

ulong milliseconds = (intpart * 1000 + (fractpart * 1000) / 0x100000000L);

var timeSpan = TimeSpan.FromTicks((long)milliseconds * TimeSpan.TicksPerMillisecond);

var dateTime = new DateTime(1900, 1, 1);

dateTime += timeSpan;

var offsetAmount = new TimeSpan(timeZoneOffset, 0, 0);

var networkDateTime = (dateTime + offsetAmount);

return networkDateTime;

}

#51976 How to read data html with web server?

Posted by Graham.fry on 06 August 2013 - 11:44 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi

[font="calibri;"]In my request I have limited my response to 2 characters and my var indicator is light= this works every time[/font]

//Get request
byte[] buffer = new byte[bytesReceived];
int byteCount = clientSocket.Receive(buffer, bytesReceived, SocketFlags.None);
string request = new string(Encoding.UTF8.GetChars(buffer));
Debug.Print(request);

//int countof = request.IndexOf("light="); //for my code
int countof = request.IndexOf("user=");
countof = countof + 6;
//var s = request.Substring(countof, 2); //for my code

You may need to add the following and it may need some tweeking

int noChatTotext = X //(this is the number of char to the end of user= it should constant)
int lengthOfrequest = request.length(); //calculate the length of the hole request sent.
int noCharToGet = lengthOfrequest - noChatTotext; //the length of the text you want
var s = request.Substring(countof, noCharToGet); //S will be the text you want

#51097 Hello World Webservice where to start Visual Studio 2012

Posted by Graham.fry on 05 July 2013 - 06:09 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi all

I have installed the SDK and upgraded the board to 4.2.2.2

Under microframwork I get

Class

Device Emulator

Windows Application

I can build a blinky application and control RGB's etc. that is using the console application should I just us the console application to build the webservice.

#51081 Hello World Webservice where to start Visual Studio 2012

Posted by Graham.fry on 04 July 2013 - 11:44 AM in Netduino Plus 2 (and Netduino Plus 1)

Thank you

I will look into these answers

#51043 Hello World Webservice where to start Visual Studio 2012

Posted by Graham.fry on 03 July 2013 - 08:24 AM in Netduino Plus 2 (and Netduino Plus 1)

[font="arial, sans-serif;"][color=rgb(34,34,34);]Hi[/color][/font]

[font="arial, sans-serif;"][color=rgb(34,34,34);]I am trying to write a web service for my Netduino plus 2 and I can�t find where to start.[/color][/font]

[font="arial, sans-serif;"][color=rgb(34,34,34);]I can write basic applications and have set up the I.P. and mac address for the Netduino.[/color][/font]

[font="arial, sans-serif;"][color=rgb(34,34,34);]I am using Visual studio 2012 express, do I need the pro version.[/color][/font]

[font="arial, sans-serif;"][color=rgb(34,34,34);]All the examples I can find seem to use 2010 and suggest I start in Netduino Plus Application. I can�t seem to find the equivalent in Visual studio 2012 express. [/color][/font]

[font="arial, sans-serif;"][color=rgb(34,34,34);]I would appreciate any help or sample code, just a simple HELLO World and how to run it in 2012 express is fine. [/color][/font]

[font="arial, sans-serif;"][color=rgb(34,34,34);]Thank you[/color][/font]

#51021 RGB Led using PWM

Posted by Graham.fry on 02 July 2013 - 03:04 PM in Netduino 2 (and Netduino 1)

Thank will try this and let you know

#51015 RGB Led using PWM

Posted by Graham.fry on 02 July 2013 - 11:36 AM in Netduino 2 (and Netduino 1)

Hi

I am trying to get an RGB Led working. I am using some code from the web.

The problem is that every time I deploy it, it comes up with the following error:

The thread '<No Name>' (0x2) has exited with code 0 (0x0).

A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.SPOT.Hardware.dll

and then you an not connect any more you need to flash the firmware to be able to do anything.

I am using firm ware 4.2.2.2 and the right SDK 4.2.

I have tried different I/O (4,5,6) and combinations.

I have tested the board with, a basic blinky app and a push button app and all is working

Code sample

using System; //use base classes using System.Threading; //use threading classes using Microsoft.SPOT; //use smart personal objects technology classes using Microsoft.SPOT.Hardware; //use hardware related SPOT classes using SecretLabs.NETMF.Hardware; //use Secret Labs hardware framework using SecretLabs.NETMF.Hardware.Netduino; //use the Netduino specific classes

namespace NCIR01 /// Define the namespace we are in /// { public class Program { public static void Main() /// The Main loop (run at power up) /// { PWM rgb1 = new PWM(Pins.GPIO_PIN_D8); PWM rgb2 = new PWM(Pins.GPIO_PIN_D9); PWM rgb3 = new PWM(Pins.GPIO_PIN_D10);

while (true) /// Do Forever /// { rgb1.SetDutyCycle(100); rgb2.SetDutyCycle(0); rgb3.SetDutyCycle(0);

} /// Close Forever Loop /// } /// Close the Main() Loop /// } /// Close the Program Loop /// } /// Close the Namespace Loop ///

Any ideas would help

Thanks

Graham

#50293 The thread '<No Name>' (0x2) has exited with code 0 (0x0).

Posted by Graham.fry on 05 June 2013 - 06:13 AM in Netduino Plus 2 (and Netduino Plus 1)

Thanks for your help

#50215 The thread '<No Name>' (0x2) has exited with code 0 (0x0).

Posted by Graham.fry on 03 June 2013 - 01:11 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi All

I am having a problem

I am deploying a simple blinky app.

I keep getting the following error when I deploy to my netduino plus 2, running firmware version NetduinoPlus2_Firmware_4.2.1.1 or NetduinoPlus2_Firmware_4.2.2.2 I have tried both.

The thread '<No Name>' (0x2) has exited with code 0 (0x0).

Everything seems to work but I don't know what the implications are for a larger application.

#45200 cannot attach debugger engine!

Posted by Graham.fry on 09 February 2013 - 09:21 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi All thank you for your help after much effort I have managed to flash my netdurino and go it working

I think it is something you need to learn when you start

Thanks

#44476 cannot attach debugger engine!

Posted by Graham.fry on 29 January 2013 - 06:19 AM in Netduino Plus 2 (and Netduino Plus 1)

Thanks for the replies

I will test this ASAP and get back to let you know if it works

#44376 cannot attach debugger engine!

Posted by Graham.fry on 28 January 2013 - 11:41 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi

I am new to Netduino or anything like this so please help if I am posting this in the wrong place or anything like that.

I am a C# developer and so far have nothing but good things to say about the netdruino and love working with it.

Currently I am having a small issue I have a basic blinky working on the netduino plus 2 running version 2.somthing

I then took an RGB Led and got it producing the three primary colours, I then removed all my code and wrote one pwm line of code with all the setup things I needed to do.

When I up loaded this nothing happened no lights came on or any thing I then tried to roll back to blinky and I get the error

... cannot attach debugger engine!

Error 1 Unable to communicate with device USB:Netduino

Please help I am going crazy Not being able to play with my netduino.

The code that broke my favorite toy

static PWM ledgreen = new PWM(Pins.GPIO_PIN_D6);

const uint period = 3 * 1000 * 1000; // 3 ms

const uint duration = 1 * 1000 * 1000; // 1 ms

public static void Main()

{while (true)

{

ledgreen.SetPulse(period, duration);}

}

Thanks

Graham