Lpc2000

Hi,

I am aware that reading periphery in some windows could clear some flags, but I don't have any "periphery window" opened....

marko

> 
> Od: "Dan Beadle" <dan.beadle@...>
> Datum: 2005/11/15 Tor PM 04:06:02 CET
> Za: <lpc2000@yahoogroups.com>
> Zadeva: RE: [lpc2000] Breakpoint not stopping timer
> 
> I have seen this when I have the VIC registers open in a window.  
>  
> As I recall, the issue is something like this:  When I hit the first
> interrupt, another hit while stopped in the IRQ, then reading the VIC in
> the debugger clears then pending timer int.  Then no more interrupts.
> Generally, I keep the VIC register window closed.
> 
>   _____  
> 
> From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
> Of Marko Panger
> Sent: Tuesday, November 15, 2005 6:26 AM
> To: lpc2000@yahoogroups.com
> Subject: [lpc2000] Breakpoint not stopping timer
> 
> 
> Hi all,
> 
> I am facing a  strange problem when debugging applications with match
> compare timer interrupts enabled.
> Hi all,
> 
> I have a timer match IRQ which fires every 1ms. Basically a ticker.
> Because the timer is used also for other purposes I add a value of
> 1000 to the timer match register to get the next interrupt after 1ms
> (timer clock is 1Mhz). I do also increment a variable in the match IRQ.
> 
> I have noticed that if I a put a breakpoint (it doesn't mater where,
> IRQ or main loop) the IRQ isn't hit anymore. After playing around I
> noticed that when the breakpoint is hit the timer still goes on for
> some time, but without hitting the IRQ. Because of this the timer
> count register goes ahead of the match register and the match does not
> occur anymore. Further I discovered that when single stepping the
> global ticker variable is incremented which means that single stepping
> takes more than 1ms.
> 
> I am wondering that the internal JTAG logic has some flavors or is
> this my debugger issue ? Has anybody else noticed such a behavior ?
> 
> Regards,
> marko
> 
> 
> 
> 
> 
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