spcboog

Hi Giuliano, Noom, Chris, thanks for your advice.

 

The weird thing is that after trying a bunch of times unsuccessfully, it seems to have come back alive again. With the Netduino Plus 2 plugged in, the ONLY thing I did was go into Win7 Device Manager and enable the 'Show hidden devices' option. I wanted to enable that option so that I could uninstall the driver. When I searched through the devices with that option on, nothing showed up in any of the categories. I closed the device manager and left my computer.

 

When I came back to my computer a little while later, the window for Control PanelHardware and SoundDevices and Printers happened to be open. To my surprise, I could see the Netduino Plus 2 under 'unspecified'. I thought maybe it was just to do with my 'Show hidden devices' adjustment, but then why wasn't my older Netduino Plus showing up? Sure enough the Netduino Plus 2 was back for real. I tried deploying and debugging a basic program and it seemed fine.

 

Giuliano, I really did try all the ports/cables combinations that were working for my Netduino Plus. So I have no idea why it just magically started working again. Noom, when it stopped working I was just iterating through different adjustments in software for a balance bot, I did think maybe I fried something even though I didn't see how I would have done so. Chris, when it wasn't working I did try forcing the bootloader mode with the button press but the device did not show up and the blue led did not light up.

 

Anyhow thanks everyone for the info. After the Netduino plus came back alive I was handling it wondering what the heck happened and was holding the bottom of the board and noticed it was quite warm. Currently it is plugged into USB but idle and it still seems warm. Is this normal?

 

thanks

HI spcboog,

 

Try unplugging the N+2 from your PC, then removing the driver and then plug it back in. This time make sure you select the have disk option. You have to install the MFUSB drivers for it.

 

The URL below explain how:

 

http://forums.netdui...-mfusb-drivers/

 

Hi Giuliano,

 

Thanks for the suggestion but the device is not registering at all, it's not coming up as an unknown device or anything else. If I power it up externally, the existing program doesn't seem to be running either. Is there a definitive way of telling whether the board is dead?

 

thanks

Thanks Magpie, I'll try removing other elements from the overall circuit to see if it makes any difference.

Hi Magpie, Sorry about that. I'm not using ARef in my code. The two analog pins tied to ground via 800 Ohm resistors read in code ~40 with no SetRange call. If I'm not screwing up the calculation, that's ~129mV (3.3/1024*40), which is pretty far off from the multimeter reading of 1.6mV. thanks

Hi Magpie, Thanks for the suggestions. With the sensor disconnected. Vin - 9.84V 5V - ~5V 3V - ~3.3V ARef - 17.7mV AGND - 0.6mV A1 tied to ground with 800 Ohm - 1.6mV A2 tied to ground with 800 Ohm - 1.6mV thanks