Objective Development Forums

Hmm, it's difficult to tell from the photo but it looks to my like you might not have connected D+/- to the correct pins on the uC. If it's not that then I'm afraid I can't help.
Perhaps someone a bit more linux savvy can glean more from the dmesg output.

Ok, try putting the zeners on the other side of the 68R series resistors and see if that helps.

I added capacitors but that didn't help either. The feedback caps on the crystal are IMO essential for this type of application, check the datasheet to be sure you're using the optimal values. There should also be some filter caps across the supply, I usually go for 100n & 4u7 though this is le...

Can't see anything obvious myself but I'm guessing it's a hardware issue. Those zeners should be ok though, I'm pretty sure they're the same ones I use. Perhaps you could provide a bit more info about your setup, eg. is it on breadboard? can you post a photo of it? Might also be helpful to know whic...

If it IS a mega8 (not mega8A or mega8L) then I don't think it's rated for < 4.5v operation. Check the datasheet for your device and make sure it can run at 16Mhz at ~3.6v.

Not quite V-USB or HID but a good starting point might be: http://www.xs4all.nl/~dicks/avr/usbtiny/ Also look at the InfraHID project.

On the d+ line i have a zener diode in series with another zener diode in opposite direction (i.e. clipper diode configuration) to produce a 2.9+.7 voltage drop. I suggest you try one of the setups recommended in the wiki http://vusb.wikidot.com/hardware You may be getting the correct levels initia...

Just a quick update, I found a slight mistake on my breadboard setup. Basically I had the pull-up resistor on the wrong side of the series resistor. Still the same under Vista (though this has been explained) but now my XP box correctly identifies the device and it shows up in 'My Computer' as an ex...

Ok, I have built up a test rig with my mega88. When I first plugged it in things seemed quite promising, the device was recognised as a usb mass-storage device but fails when trying to install the driver. That was Vista so I thought I might have more luck with XP however my old desktop doesn't recog...

Looking at the code I think the basic setup is D+ on INT1 (Pin 5), D- on INT0 (Pin 4). There also appears to be two LED's, Green on PC2 (Pin 25) and Red on PC3 (Pin 26) Both seem to be active low. I now see what needs changed for mega88 compilation (Thanks Grendel) I will try it myself later when I ...

I am interested in this too and have ported what I think are the necessary bits to avr-gcc and got it to compile with AVR Studio. Unfortunately I don't have a mega8, I do have a mega88 but when I try to compile for that I get an error that GICR is not defined. I'm sure its not insurmountable but for...

Don't know if it's any help but I just tried it with WDK and it compiled ok for me using VC2005. The setup used was much the same as I describe for the hid-data example in this post:

http://forums.obdev.at/viewtopic.php?f=8&t=3388

What about the hid-data example? I hear you ask (or maybe not). Anyway, I decided to try out a notion of mine that it might be possible to compile the example project with Visual Studio using the DDK headers from MinGW. To cut a long story short I couldn't do it, which ever way I tried I was blighte...

Regarding Visual Studio, I have just finished making myself a USBasp (works an absolute treat btw) so now I porting some of my previous work onto my notebook. I have been configuring MSVC (2005 Express) for libusb so I put together this quick how-to based on the custom-class example, here goes: Open...

Glad I could be of assistance, though I am really not sure what's wrong now. Assuming VID & PID match and you have not changed the name of the device from the default 'LEDControl' check the following: Does your device show up in Device Manager under LibUSB-Win32 devices as LEDControl (This devic...