Dragon...and smoke and flames :-(

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#1
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Well, just from me at the moment, until I take a blowtorch to it :evil: ...but I got your attention!

Bought myself one for Christmas. Seems to work fine when it works but it keeps getting 'lost' on the USB bus when I try to connect to it from AVR Studio/Win XP both fully up-to-date

Sometimes it works all night, other times after I've done just two or three ISP download/run/re-download cycles - ATMega32 on external board, powered from Dragon Vcc and fed back into ISP connector pin 2. Only load on external board is ATMega32, a MAX232 and one LED

Same whether running from a powered hub (500ma) or a direct USB port

If I look in Device Manager when it gets lost, it's not there (appears as Jungo when OK) and sometimes I can recover it in Device Manager by Right Mouse Button on computer name to "Scan for hardware changes". But sometimes I can't and it requires a computer re-start to get it back :grrrrr:

When its not being used by AVR studio, but 'on the USB' the 1 and 2 LEDs are red and green respectively (which doesn't fit with the description in Tools help):

LED# Color  Description
 
1    Red    Idle, not connected to AVR Studio
     Dark   Idle, connected to AVR Studio
     Green  Data Transfere
     Yellow Firmware Upgrade or Initialization

2    Green  Indicates USB traffic 

...and when it's 'lost on the USB' with AVR Studio open (but Dragon 'not connected')the LEDs are red and dark respectively - more believable.

I'm certainly not in the mood to recommend a Dragon to anyone at the moment...

Any ideas?

NOTE: just made multiple edits to describe it more accurately. Sorry

Last Edited: Wed. Dec 27, 2006 - 09:38 PM
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- added no value

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To me it seems a Windows related problem...

I am recently having problems with syptoms similar to what you describe with a Pico Technology USB oscilloscope on my work laptop. This used to work perfectly, but now it is getting detected only occasionally. If it doesn't work, a reboot is needed to get USB devices to work again.

The only causes that that I can point my finger at are:
1. Some windows update that messed up the USB system
2. Lib-USB, which has been installed recently in order to support the new avr-dude.

I will be able to determine if it's Lib-USB once I get back to work, because the USB scope is at the office, and I am on holiday...

I suggest checking if you have lib-USB and either uninstall it, or roll back to a restore point prior to its installation. I don't want to blame lib-USB, and no promises that it will solve the problem in any way, but it might be worth a try.

Cheers!
Edwin

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Thanks - I've done a quick search on lib-USB and I'm not sure what it does for me...

...I program in ASM and it's an XP machine, so does it apply to me?

Got to go off-line a moment anyhow - got to re-boot to get my Dragon back :grrrrrrrrrr:

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Well, lib-USB is something that usually you install knowingly. From your wording, you give me the impression that you don't have it installed.

It's an open source library for adding USB access to Windows/Linux/BSD programs. Open source programs very often rely on it.

Sorry for not being able to help, though I have a couple of Dragons, I haven't used them much.

Hopefully others on this forum with more experience will be able to help you out.

I'm off for the night...

Cheers!
Edwin

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To eliminate the possibillity that it is power induced try feeding the mega32 board with an external supply other than the Dragons Vcc. You will eventually need to do this anyway when you start to add some loads to the board .

Pete

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Gee, it's gota be a Windows thing. My Dragon has been powered up solid, since before Christmas and hasen't missed a lick.

You can avoid reality, for a while.  But you can't avoid the consequences of reality! - C.W. Livingston

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Quote:

Gee, it's gota be a Windows thing...

and
Quote:

...I program in ASM

You'd NEVER have your Dragon breathe fire with a C program.

;)

Lee

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Sounds kind of obvious but, check the cable? My STK500 was showing some serious communication problems, turns out my USB Serial converter was blinking out of existence, I swapped out the USB cable and it stabilized.

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Well, I changed the cable ... and it made no difference :(

So I changed it to yet another one ... and I've given it a good hammering tonight and it's as good as gold!

We'll see what happens over the next few days.

Thanks, so far, all!