This was a strange issue and I never did figure out why the N2 code would not run on the N+2, I did find a work around.

Basically, I defined the input using the Auto-Repeat button (http://forums.netdui...n-press-sample/) and it worked. Don't ask me why this worked, but it did.

Hanz,

Well I'm still getting intermittent behavior with the second line of the display. I grounded D0-D4 with a 100k resistor as you suggested and that did not resolve the problem. I purchased another 16x2 LCD from Adafruit and that did not solve the problem. I've even ported my code to a N+2 and I'm still seeing the issue of sometimes being able to see line 2 but most of the time I can't. If I unplug the USB cable to reboot, hold my jaw just right and I'm not wearing any socks, the 2nd line will sometimes work. All joking aside, I'm convinced its not a hardware problem.

You mentioned that it could be an issue with clocking. I assume this would be in the MicroLiquidCrystal library correct? Would a shift register and Mario's library solve the problem?

Upon closer examination, here is the debug output:

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

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

An unhandled exception of type 'System.ArgumentException' occurred in Microsoft.SPOT.Hardware.dll

Any suggestions?

Ok, so I referenced

using SecretLabs.NETMF.Hardware.Netduino;

and I still get the same exception.

I next tried moving the button assignments around and now I get the same exception, but on a [font="arial, helvetica, sans-serif;"]different InterruptPort assignment.[/font]

[font="arial, helvetica, sans-serif;"]Keep in mind that I'm moving from a Netduino 2 to a Netduino + 2. Chris' post refers to N+ to N+2.[/font]

I have code that works fine when running on N2, but when I run the same code on the N2+ I get a System.ArgumentException on this line of code:

// Input Trigger - This input starts the cycle

InterruptPort inpTrigger = new InterruptPort(Pins.GPIO_PIN_A5, true, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeLow);

It is simply a button to start my program running.

BTW I am using:

using SecretLabs.NETMF.Hardware.NetduinoPlus;

Any suggestions?

-Capel

It's a feature on our wish list, something that we baked into the hardware design. Right now we're focused on ensuring that all Netduino Plus 2 features work really well for our community and that projects upgrade seamlessly.

After the holidays we'll start attacking new software features. If this one gets the most votes, it gets in the first batch

Chris

Did this make the list?

I definitely have a conflict with the SPI pins. If I free up D10-D13 I'm 2 pins short of what I need for the project.

NooM,

I have the N2 with a 2gb SD card.

The reason I say it does not appear to work is because my app works when the I/O is connected to the N2, but when I plug in the SD shield and move all the I/O wires to it, the app will not run. Nowhere does the documentation say it is Netduino compatible, I was assuming it was when I bought it, now I'm trying to confirm this assumption. I have not written any code to read/write to the SD card, yet.

You can see my initial schematic here: http://forums.netdui...uttons-and-lcd/

I'm not familiar with eeproms, would you point me to some tutorials? I like the sound of cheap:)

I purchased a Seedstudio SD shield (http://www.seeedstud...l?cPath=132_134

) but it does not appear to work. Has anyone used this shield with the Netduino?

If not, what shield do you suggest?

I need to store 18 configuration values (double) from one power up to the next...

-Capel