Lpc2000

Hi Ross,

You might try tracing execution of the ISR in assembly mode to make 
absolutely certain that no accesses are made to flash.  This would 
include constant data (i.e., initializers inside a function) as well 
as code.  Every CPU access must be to RAM or a to a peripheral, since 
flash is unavailable during IAP.

Tom



--- In lpc2000@yahoogroups.com, "rjwal3" <rossjwalker@n...> wrote:
> 
> --- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote:
> > 
> > --- In lpc2000@yahoogroups.com, "rjwal3" <rossjwalker@n...> wrote:
> > > 
> > > I have set the UART interrupt up to run from RAM so I can use 
it 
> > > during IAP writing to FLASH yet it causes the same problem as 
if 
> I 
> > > were running the interrupt from FLASH.
> > > Does any one have any experience this?
> > > 
> > > The interrupt vector in startup.s is:
> > > 
> > >    LDR     PC, [PC, #-0x0FF0]     /* Vector from VicVectAddr */
> > > 
> > >  And the vector address for my UART1 interrupt is my RAM 
> function:  
> > > 
> > >   VICVectAddr2 =  (unsigned long)u1intRAM;
> > > 
> > > 
> > > This works fine by itself, but not when I try to use IAP with 
> the 
> > > UART interrupt anabled and all the rest disabled.
> > > 
> > > Could it still be getting something from FLASH?
> > 
> > Have you relocated the interrupt vectors, i.e. copied them from 
> flash 
> > to RAM and changed MEMMAP?
> > 
> > Karl Olsen
> 
> 
> yes I have copied the interrupt vectors to 0x4000000, and the 
> interrupt procedures are in RAM as well and MEMMAP = 2.
> This All works fine unless I try to use it in conjunction with IAP, 
> and the IAP works fine provided the interrupt is disabled. I can't 
> see why it wont work, I guess more research is required.I