Lpc2000

Hi Karsten,

yes I have a default handler, that is not the cause.
In the meanwhile I learned that it isn't really an interrupt problem.
I have a function which is called by a timer-ISR. That function 
starts the UART transmission by writing the first byte to the THR. 
The UART-ISR should then do the rest. The problem is that the 
function called by the timer-ISR isn't really always called. When I 
put an additional function call (something different for debug 
issues) then the function will be called savely every time.
The problem is not the timer-ISR (I observed this with an osci and a 
toggled debug-pin). I think there is a coherence with the long calls 
I use or with globals or with the optimization levels or all these 
things together. I guess I have to observe some more things tomorrow. 
The debugger isn't very helpful cause I experienced that it affects 
the behaviour of that things...

Thats all I have now
regards
Detlef


--- In lpc2000@yahoogroups.com, Karsten Weiss <lpc2000@w...> wrote:
> Hi Detlef,
> propably, this might be a problem with sporadic interrupts 
mentioned in 
> the LPC22xx user's manual. Have you set up the default interrupt 
> handler?  If not, just define an empty interrupt routine and assign 
it 
> to the default interrupt address. This will catch every sporadic 
> interrupt and your system keeps running.
> 
> Karsten
> 
> xjag74 schrieb:
> 
> >Hello,
> >
> >it seems to be a problem with long called functions and/or global 
> >variables.
> >I use long calls between functions that run in internal RAM at
> >address 
> >0x40000000 and functions in external Flash at 0x80000000. Now I 
pay 
> >with the time waste of some extra probs realizing long calls for 
the 
> >performance advantage that the internal memory brings.
> >
> >regards
> >Detlef
> >
> >--- In lpc2000@yahoogroups.com, "xjag74" <detlef.weidner@w...> 
wrote:
> >  
> >
> >>Hi,
> >>
> >>I currently try my interrupt controlled UART0 communication (only
> >>    
> >>
> >TX 
> >  
> >
> >>for the beginning) to get startet. The problem I have is that the 
> >>interrupts work really sporadicly after an reset or an breakpoint
> >>    
> >>
> >for 
> >  
> >
> >>one or two seconds or not. When I halt the LPC2210 by an 
breakpoint
> >>and rerun the communication (TX), the ARM shows the same behaviour
> >>    
> >>
> >as
> >  
> >
> >>after an reset.
> >>I compile using GCC.
> >>Has anyone an idea for that behaviour?
> >>My debugger brings me not further on that point.
> >>
> >>Thanks
> >>regards
> >>Detlef
> >>    
> >>
> >
> >
> >
> >
> >
> > 
> >Yahoo! Groups Links
> >
> >
> >
> > 
> >
> >
> >
> >
> >
> >  
> >