Fez Panda II SD Trouble with External Power

NETMF & Gadgeteer
1

I’ve been using this class for some quick SD card data logging on a Panda II:
[url]http://code.tinyclr.com/project/169/sd-card-program-logging/[/url]

It works just fine when I’m debugging (plugged into my desktop with a usb cable and loading code with Visual C# Express).

However, when I plug the Panda II into an external power source (I’ve tried a usb cable into an AC adapter and a 9V wall wart), the program hangs. (It seems to hang somewhere around line 84 of the class code).

Any ideas why it works plugged into the desktop, but not standalone?

Thanks!

2

Are you using serial port events?

You can always add some debug.print here and there to track down why it is not working when not debugging

3

I’m doing some SPI and I2C communication.

Since it works when I’m in debug mode but not when it’s standalone, I’m not sure what I could add with debug.prints that would help, since I can only see that output in debug mode… when it’s working.

Any ideas?

Thanks!

4

Open MFDeploy, connect to your panda and you’ll see all your debug statements in the console window.