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???
04/20/11 14:12
Modified:
  04/20/11 14:44
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 		 #181957 - a caveat
Responding to: ???'s previous message
And when using a small ARM, you normally have access to a number of big-brothers that are code compatible (including peripherials) but has one or more of:
- more pins
- more peripherials
- more memory
- faster core
- ...
and higher interrupt latency

I, actually, just did a thing with a 72MHz ARM where I wished it had been a f120.

for the Cortex (the ARM in question) an interrupt interrupting an interrupt has a latency of min. 18 clocks! an equal or lower priority interrupt going pending when another ISR is executing is even worse (maybe just as bad, the docs are a bit fuzzy on this one)

Erik

reference

http://infocenter.arm.com/help/topi...p1_trm.pdf

List of 32 messages in thread
TopicAuthorDate
[ARM] Any good introduction to ARM assembler?            01/01/70 00:00      
   Every experimenters moving to ARM??            01/01/70 00:00      
      Large span of capabilities with same tools etc            01/01/70 00:00      
         Cheaper?            01/01/70 00:00      
            Depends on how to compare            01/01/70 00:00      
               How very true            01/01/70 00:00      
               a caveat            01/01/70 00:00      
                  Picking the right tool for the job.            01/01/70 00:00      
                     sometimes you are not the picker            01/01/70 00:00      
                        Cortex NVIC behavior.            01/01/70 00:00      
                           the way I read it            01/01/70 00:00      
                              A question if registers needs to be saved            01/01/70 00:00      
                              Possible cases:            01/01/70 00:00      
         luckly            01/01/70 00:00      
            Lucky??            01/01/70 00:00      
      don't know about experimenters, but ...            01/01/70 00:00      
         Easier to jump between many architectures now            01/01/70 00:00      
   Have you tried...            01/01/70 00:00      
      Is this a way to say "no"? ;-)            01/01/70 00:00      
         In the absence of a recommendation...            01/01/70 00:00      
   ARM assembly is fairly "plain" ...            01/01/70 00:00      
      RealView            01/01/70 00:00      
      shorter, better...            01/01/70 00:00      
         Just dive right in.            01/01/70 00:00      
            Not trivial either            01/01/70 00:00      
               Valid points, but ...            01/01/70 00:00      
            none, then?            01/01/70 00:00      
   related thread on LPC2000 yahoo group            01/01/70 00:00      
   Erik found something            01/01/70 00:00      
   Re: [ARM] Any good introduction to ARM assembler?            01/01/70 00:00      
   Check this link            01/01/70 00:00      
      Why? How is it relevant?            01/01/70 00:00      

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