Lpc2000

At 12:03 PM 4/20/06 +0000, jayasooriah wrote:
>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.

Just as a matter of information.  It may give some insight into some 
portion of the membership here.  I doubt I'm unique in any of these 
viewpoints although I may well be in a minority.

         Security - Don't need it.  To copy my SW they also have to 
(generally ) copy the HW.  It's a lot easier to tell when they've done 
that. For many products it's as easy to redesign as it is to copy.  Others 
have different requirements although I suspect that in general people 
overestimate the value of their SW.  Hey it's their sweat equity they have 
every right to value it.
         Protection - I'll take whatever I can get for a reasonable 
price.  Reasonable depends on the project. Ideally I'd like to restrict I/O 
and memory access ranges to specific process for no extra memory or dollar 
cost. :)  Likewise ESD and EMI/EMC protection,  Oscillator watchdogs etc..
         Watchdog - Depends on the project but for most I want a 
watchdog.  It's not there as a normal guard against program bugs and such 
but as a last attempt to get back to a safe starting point.  It might catch 
items the ESD discharges that make it through the hole the customer put 
into the enclosure with a forklift and changed the short timing loop into 
an infinite loop;)  It certainly should never be part of normal operation 
and it's one of the very last pieces put into place.

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/