Hi Marko, When a debugger backtraces off the end of the callstack it may unwittingly reference peripheral registers - could you be affected by this? We've stopped CrossStudio accessing peripheral registers when backtracing to handle this case. Regards Michael >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 >> >> >> >> >> >> >>SPONSORED LINKS >>Microprocessor >><http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2 >>=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=9 >>3&.sig=tsVC-J9hJ5qyXg0WPR0l6g> Microcontrollers >><http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor& >>w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s >>=93&.sig=DvJVNqC_pqRTm8Xq01nxwg> Pic microcontrollers >><http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microproces >>sor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c >>=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> >>8051 microprocessor >><http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocess >>or&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c= >>4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> >> >> _____ >> >>YAHOO! GROUPS LINKS >> >> >> >>* Visit your group "lpc2000 >><http://groups.yahoo.com/group/lpc2000> " on the web. >> >>* To unsubscribe from this group, send an email to: >> lpc2000-unsubscribe@yahoogroups.com >><mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> >> >>* Your use of Yahoo! Groups is subject to the Yahoo! Terms of >>Service <http://docs.yahoo.com/info/terms/> . >> >> >> _____ >> >> >> >> >>[Non-text portions of this message have been removed] >> >> >> >> >> >>Yahoo! Groups Links >> >> >> >> >> >> >> >> >> > > > > > >Yahoo! Groups Links > > > > > > > >
Message
Re: [lpc2000] Breakpoint not stopping timer
2005-11-15 by Michael Johnson