Lpc2000

I feel like I am being expected to answer to prima donnas who are 
affronted at the suggestion their beautiful abstract creations might 
be sullied by dirty greasy real things under the bonnet, that it is 
beneath their dignity to be expected to have knowledge of. You can 
just feel the 'hurt', after all I am now expected to explain the 
obvious.

What is very clear is that there is an appalling lack of good sound 
electronic and architectural knowledge from participants in the 
group. If there was sound knowledge then these guys (Jaya and 
Dominic) would never have got away with theie pseudo discussions, 
wrapped up in pseudo educated 'consultancy speak'.

There is a clear need for a document that explains the very basics. I 
wish I had time to do this. I don't. It is not my job. It is not the 
job of Philips, their job is to sell excellent prodcuts. It is the 
job of educators or researchers, in fact those who are doing the very 
undermining.

JTAG and debug are NOT the same. For those who are educated the 
meaning of the word debug is made clear by the context. In the 
context of CRP, debug clearly means enabling the debug bus signal to 
act, which JTAG, if enabled, may be attempting to assert. Lack of 
real educated insight is giving rise to confusion that should not 
exist and I should not be expected to clarify, particularly to those 
who claim or imply expertise. Clearly debug can also mean JTAG, but 
in a different context.

John Heenan

--- In lpc2000@yahoogroups.com, Dominic Rath <Dominic.Rath@...> wrote:
>
> Hello John,
> 
> Sorry if I misinterpreted what you wanted to claim with "fact 2", 
but I'm 
> still having trouble understanding what you mean. Actually, both 1 
and 2 seem 
> a bit confusing, just as the first paragraph of your last posting. 
I'm not 
> sure if you really understood everything as well as you believe.
> 
> Enabling/disabling JTAG and debug (these two are the same) is done 
by way of 
> PINSEL2, which decides if the corresponding pins are used as JTAG 
or GPIO. 
> You say you didn't want to state that CRP enables/disables JTAG, 
but that's 
> just what it does.
> Not the bus signals are being blocked, but the JTAG signals - the 
manual says 
> that internal multiplexers decide to which peripherals the pins are 
routed, 
> depending on the PINSEL registers.
> 
> I didn't reply to this discussion for several weeks, after it 
became obvious 
> to me that CRP works as long as the bootloader is reasonably free 
of bugs. 
> Even if such a bug exists, it can be easily fixed by Philips, so 
this isn't 
> criticial.
> 
> It was quite easy for me to ignore these threads, and look for 
other 
> interesting stuff on this list - I don't understand why others just 
can't do 
> the same, but insist on requesting this to be stopped. The recent 
amount of 
> "please stop" postings is just as annoying as the continued 
discussion of the 
> matter itself.
> 
> Regards,
> 
> Dominic
> 
> On Tuesday 28 February 2006 19:01, John Heenan wrote:
> > No Dominic. My facts are not wrong. Below is what I stated and 
what
> > Jaya replied. I asserted in Fact 2 that CRP decides if signals 
from
> > JTAG will be allowed to act. This assumes JTAG is enabled and
> > attempting to pass signals. Surely this is clear. I did not state
> > signals to JTAG (from a debugger for example), I stated signals 
from
> > JTAG, which in the context of Fact 1 clearly means bus signals.
> >
> > I never stated CRP enables or disables JTAG. JTAG electronics
> > operates independently. JTAG can be enabled and spinning uselessly
> > because CRP has not enabled Debug.
> >
> > I will not accept my comments are unfair. If someone posts to a 
group
> > and imply a level of knowledge they do not possess then it is
> > appropriate and fair to point this out. If you regard it a 
personal
> > attack, that is not my problem, it still does not mean the 
comments
> > are inappropriate.
> >
> > I have no intention of giving lessons in basic electronics. Yes I 
am
> > aware you have put on the web a rather lengthy document concerned
> > with JTAG.
> >
> > I personally am really fed up the damaging effects of the poor 
level
> > of insight of self proclaimed experts.
> >
> > John Heenan
>