On Fri, Nov 28, 2008 at 11:19:15AM +0530, abhishek srivastava wrote: > sir, > i got a doubt when i saw larmour's post (Re: Support for LPC2XXX IAP > interface) in ecos-patches! > i am trying to port ecos onto LPC2148 so as to do some realtime application > with that. > as this board doesnot have sufficient RAM, would porting ecos to ROM will > hamper the real time property of ecos??
ROM is generally slower than RAM. So running from ROM might slow your execution speed down a little. However it is deterministic. So the system will still be as real time, just slower. The problem comes when you start writing to FLASH while running from FLASH. Flash controllers don't allow this. You have to stop what you are doing, and only perform writes to FLASH. You cannot do anything else. So you loose your real time properties. So if you can avoid writing to FLASH you should not have to worry. Andrew -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
