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Author Topic: Device missing or unknown device (-24)  (Read 8405 times)

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Offline pomprockerTopic starter

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Device missing or unknown device (-24)
« on: August 28, 2008, 07:47:58 PM »
I know this is a common topic, but everyone's situation is different.

Suddenly last night after uploading code and testing it out to work good. I went to write more code and program again and I got the infamous error message, without touching anything! (fuses, electronics, etc..)

The robot runs just fine. I went over the programming pins with a dmm and its all good. I did not change ANY settings in ponyprog, I have it all set up perfect. Battery is charged 100%

What the hell?

Offline pomprockerTopic starter

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Re: Device missing or unknown device (-24)
« Reply #1 on: August 28, 2008, 08:27:53 PM »
I hit ignore, and it writes and verifies. But at the end it says "Write Failed!"

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Re: Device missing or unknown device (-24)
« Reply #2 on: August 28, 2008, 08:33:27 PM »
Quote
I got the infamous error message, without touching anything!
So the error came *before* you pushed program?

Quote
The robot runs just fine.
So you got the error, but then the robot still works?

Perhaps a loose connection caused a temporary short?

Restart windows? :P

Offline pomprockerTopic starter

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Re: Device missing or unknown device (-24)
« Reply #3 on: August 28, 2008, 08:38:22 PM »
Well obvisouly the error came after selecting 'write all' like i usually do.

no the robot is still programmed from the previous time about 5 minutes earlier.

of course i blamed windows first. still not working.

Offline pomprockerTopic starter

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Re: Device missing or unknown device (-24)
« Reply #4 on: August 28, 2008, 10:00:45 PM »
i put the atmega8 in there and can't program it either.

so since I checked the programming header on the board to be OK

I suspect the programmer cable. do those suddenly go bad?

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Re: Device missing or unknown device (-24)
« Reply #5 on: August 28, 2008, 10:40:55 PM »
not a clue . . .

i'm still thinking there was a temporary short somewhere, something jostled just enough to cause a temporary short . . . this kind of short is almost impossible to find with a multimeter . . .

Offline pomprockerTopic starter

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Re: Device missing or unknown device (-24)
« Reply #6 on: August 29, 2008, 01:52:23 AM »
at any rate what i dont have to test with is another programmer, so i set aside my serial dongle and ordered an avrisp2 mkII

and if that don't work i'm ordering an axon, cause i'm tired of fooling with my horribly soldered $50 robot board. its delaying my talents here.

Offline pomprockerTopic starter

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Re: Device missing or unknown device (-24)
« Reply #7 on: September 03, 2008, 11:19:15 PM »
Yeah I think it was a phantom short somewhere.

Anyway, I unsoldered my 2x5 header and hooked up a 2x3 header for the avrisp mkII.

I also broke out the pins for port B and hooked it up to unregulated power, for use of more servos.

So it is able to be programmed again with the mkII.



 


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