Yeah my problem seems really related to the hardware. When i remove the VDDIO 
Jumper (power pin for IO signals) i could succesfully control the MCU.

Regards , Arnd 

Am 05.12.2012 um 09:07 schrieb Freddie Chopin <[email protected]>:

> W dniu 2012-12-05 08:44, Andreas Fritiofson pisze:
>> You may be right, but then it sounds like a misfeature. Why shouldn't a
>> target specific behavior override the generic mechanism?
> 
> It was like this when this cortex-m3 option was introduced, but 
> fortunately it was changed, because then all targets used soft resets 
> even if h/w reset was available, and that last one is always better 
> (especially for targets where sysrstreq is not working and vectreset 
> doesn't reset peripherals - like LPC17xx where you have to explicitly 
> state the core clock to flash it). If user specifies that there is a 
> reset than this reset should be used. cortex-m3 soft reset is defined in 
> cortex-m3 target configs and there's really no point in editing this 
> every time you change something...
> 
> You'll probably be able to easily find the discussion about that thing 
> back then - I think it all goes down to not-very-lucky design of OpenOCD 
> where everything is imperative, while it would be better if it would 
> work like that:
> - interface specifies what it supports (what reset signals it has)
> - target/board specifies what it supports (what resets are supported, 
> what lines are routed and how, ...)
> - OpenOCD chooses the best possible combination (interface has 2 resets 
> but target has only 1? use "srst_only" then)
> - user can optionally override that
> 
> With current design (almost) no interface and no target config specifies 
> resets as this wouldn't work as expected - users always have to specify 
> them by hand and usability suffers... No one will change the fact that 
> the most "user friendly" software is the one that doesn't need much 
> configuration and OpenOCD is not among such programs.
> 
> 4\/3!!
> 
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