4 replies to this topic

[zee]

Hi,

 

This is my second time try to run this project. Its from the 'Getting Started with Netduino' on Chapter 6, Dimmer Code..I have installed the SecretLabs.NETMF.Hardware.PWM and there is no error in the code. However, when it is running, it states that "unable to communicate with device - USB:Netduino" under the output tab.

There is also a message box pop-up "There were deployment errors. Continue?".

 

 

Please help me !!! Thank you!

[ziggurat29]

I get that all the time with projects unrelated to PWM, but I always assumed it was because I run my dev env in a vmware image (and USB is always a little hinky in that case).  I unplug and plug back in, sometimes restarting VS2010 and things become stable again.

 

That being said, since you mention PWM, I found out myself that if you set the PWM frequency too low, you can lock up the netmf system, so don't set it too low.  Sorry, can't remember what 'too low' is; in my case I had a typo and I set it to 10 Hz, but I think 'too low' is actually something like 100 or 100 Hz.

[zee]

Hi.. Thanks for the quick reply.. I did not set any frequency on it.

 

Here are my codes..

 

 

using System;

using System.Net;

using System.Net.Sockets;

using System.Threading;

using Microsoft.SPOT;

using Microsoft.SPOT.Hardware;

using SecretLabs.NETMF.Hardware;

using SecretLabs.NETMF.Hardware.Netduino;

 

namespace Dimmer_PWM

{

    public class Program

    {

        public static void Main()

        {

            // write your code here

 

            SecretLabs.NETMF.Hardware.PWM led = new SecretLabs.NETMF.Hardware.PWM(Pins.GPIO_PIN_D5); 

            SecretLabs.NETMF.Hardware.AnalogInput pot = new SecretLabs.NETMF.Hardware.AnalogInput(Pins.GPIO_PIN_A0);

            pot.SetRange(0, 100);

            int potValue = 0; //store and retrieve the potentiometer's current position

 

            while (true)

            {

                //read the value of the potentiometer

                potValue = pot.Read();

 

                //change the led intensity base on the potentiometer's value (0-100%)

               led.SetDutyCycle((uint) potValue);

                             

            }

 

        }

 

    }

}

[Chris Walker]

Hi zee, The code looks fine at first glance. Let's check out the other variables... What board are you using? Netduino? Netduino Plus 2? When you open up project properties, and then go to the .NET MF tab...do you see your Netduino in the device pulldown? When deployment fails, go to the Output tab in Visual Studio. If it shows more information about what failed during deployment, please post that info here. Chris

[zee]

Hi zee, The code looks fine at first glance. Let's check out the other variables... What board are you using? Netduino? Netduino Plus 2? When you open up project properties, and then go to the .NET MF tab...do you see your Netduino in the device pulldown? When deployment fails, go to the Output tab in Visual Studio. If it shows more information about what failed during deployment, please post that info here. Chris

 

Hi Chris,

 

Thanx for the response..

 

I am using Netduino Plus 2.. Yes, there is Netduino in the device pulldown.. 

The error in the output tab, stated "Unable to communicate with device - USB:Netduino"..