Lpc2000

At 12:03 PM 4/20/06 +0000, jayasooriah wrote:
>Given if one uses the SWI interface, it comes at no cost, I prefer to
>question why not.

AHA!  Why didn't you say so ;)  I was under the impression the drive was 
the other way around.  You had decided on user/system mode because of some 
protection that user mode provided and that led you to use SWI.  If you are 
using SWI then yes it makes a lot of sense to do it from user mode.

I was trying to figure out what that protection was.

That suggestion I made a few days back of reserving interrupt disabled code 
just to the kernal is intriguing.  I'll have to noodle around with that a bit.

>Accepting embedded ARM users in general have different requirements,
>my personal experience has been that that LPC users appear to have
>somewhat different requirements compared to users of other variants.
>Especially on on matters related to security, protection, and maybe
>even watchdog requirements.

There's a lot of people here from small micros. Particularly the MSP430 for 
some reason.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
they legal, genetic, or physical.  If you don't believe me, try to chew a 
radio signal. "  -- Kelvin Throop, III
http://www.aeolusdevelopment.com/