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Re: Re: [avr-gcc-list] ATtiny12 + uisp - problem?

From: Anich Gregor
Subject: Re: Re: [avr-gcc-list] ATtiny12 + uisp - problem?
Date: Tue, 26 Aug 2003 14:11:18 +0200
User-agent: KMail/1.5.2

On Tuesday 26 August 2003 06:51, Mike Hudson wrote:
> On Mon August 25 2003 16:31, Anich Gregor wrote:
> > Hi!
> > I bought some ATtiny12L to build R/C V-Mixers which take 2 PWM
> > channels as input, mix them, and output 2 PWM signals... The problem
> > is that it seems like i am not even able to program the device... ;)
> Seems you're using the Stk500 - check the software oscilator frequency
> on the board. If it's too low or too high programming may fail. (You
> can set this through uisp builds dated after 14 Jul 2003, or AVR
> Studio) It seems to work best with the 1.2Mhz 'default' frequency. I
> had a similar problem myself a few weeks ago.
I have bought 4 ATtiny12L µCs - i tried 2 and both are locked (both lockbits 
set) so i can only unlock it with the chip erase command, right? but somehow 
that doesn't work... since the device is shipped with the internal OSC (@1.2 
MHz) enabled i guess i will have to switch stk500 into that mode and then try 
erasing again?

> Also, triple-check the byzantine wiring needed to get the STK500 talking
> with the Tiny12. I've messed that up countless times. :)
byzantine wiring? what's that? i put the ATtiny12L into the blue socket 3400D1


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