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Re: JTAG problems with Olimex LPC2106

2004-10-02 by dave_albert

I have 9 or 10 Olimex LPC-P2106.  They are great boards.  They always
had some problems with the Wiggler (needed speed 5 or above), but they
worked.  Recently, I've been unable to get any of them to work with a
wiggler.  I believe they are all rev B silicon.  I have upgraded to
the latest Philips bootloader (although I don't know why this would
matter).  I am running a genuine Wiggler with OCD Commander (I've
tried several versions) on a 2.4GHz P4 (Dell Dimension 4550) running
XP.  The same setup works fine with my Olimex LPC-P2124 board.

I don't think reset is the problem because I see the same problem on
my 2106 based prototypes which have a real reset controller on-board.

any ideas?

--- In lpc2000@yahoogroups.com, "tsvetanusunov" <tusunov@m...> wrote:
> > I once encunterd the same problem with the Olimex bord & wiggler 
> > and  the OCD and it dosen't worked well (only reset work via the 
> software) the same problem encunterd with the IAR C compiler when 
> used with the Olimex LPC2106  board  & wiggler 
> 
> IAR doesn't work correctly with Wiggler, this have nothing to do with 
> our boards
>   
> > As I recall  the problem can be divided in to 2 categoris 
> >  
> > 1) Reset problem : the Olimex board use simple RC type to reset the 
> CPU 
> >     I don't remember the chip (LPC2106)revision but as i can recall 
> the first chip revision 
> >     use to have reset problem couse the chip to hang up. 
> 
> how did you solved this? can you check if LPC2106 is REV.B? this may 
> be due to the famous LPC Flash latchup in the first lot we received 
> from Philips, this is nothing to do with the reset schematic but with 
> silicon revision bug on LPC chip
>   
> > 2) Speed the computer speed is too high to handel the wiggler data 
> transfer 
> 
> which software this is related to? we have noticed IAR C-SPY works 
> well on slow computers and don't work on faster one, but this is 
> problem in IAR IDE not in our boards
>   
> > I manage to overcame the problem using the qudravox C compiler as I 
> can recall it work well with the Olimex wiggler and LPC2106 board !
> 
> you are confusing something, Quadravox have no ARM compiler to the 
> best of my knowledge
> 
> the bottom line is:
> our boards works only with compilers/IDEs which work too ;)
> - never experienced any problems with Rowley's IDE
> - never experienced any problems with OCD when working in RAM
> - from time to time working with IAR C-SPY (after number of retries 
> etc). IAR are aware of this problem, but they just refuse to support 
> our low cost JTAG to may sell their 300 EUR Segger's J-LINK with 
> their compiler
> 
> Best regards
> Tsvetan

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