Logic Analyzer is not updating my variables

Hi there,

meanwhile i have a full licence and checked again the Logic Analyzer.

I can say, YES it works, BUT the values are only updated if i enable the "Periodic Window Update". And the really poor behavior is, the values in the Logic Analyzer are only the sampled values of the "Periodic Window Update". So in the end the resolution depends on the sample time of the "Periodic Window Update". This is not acceptable in a real time application.

I know, that the SWO Trace is no full trace, but ITM Macros (printf) works fine and is sufficient, but why is that not possible with the Logic Analyzer?

If someone will change a ULink2 Adapter to my JLink, he can mail me. After some mails to segger with no response, i don't believe that there will be a solution in the next time... really sad..

Best regards

Holger

Hi there,

meanwhile i have a full licence and checked again the Logic Analyzer.

I can say, YES it works, BUT the values are only updated if i enable the "Periodic Window Update". And the really poor behavior is, the values in the Logic Analyzer are only the sampled values of the "Periodic Window Update". So in the end the resolution depends on the sample time of the "Periodic Window Update". This is not acceptable in a real time application.

I know, that the SWO Trace is no full trace, but ITM Macros (printf) works fine and is sufficient, but why is that not possible with the Logic Analyzer?

If someone will change a ULink2 Adapter to my JLink, he can mail me. After some mails to segger with no response, i don't believe that there will be a solution in the next time... really sad..

Best regards

Holger

I have full license and Segger J-Link, but I wasnt able to make it work.
Iv got globally declared volatile variable, trace turned on, uC clocked configured (in Trace option), turned on Periodic Sample, and so on just like on the pictures:
img835.imageshack.us/.../72373182.gif
img842.imageshack.us/.../42631512.gif

My code is:

volatile unsigned char logic=0;

main()
{
  while(1)
  {
    logic++;
    if( logic == 255 )
      logic = 0;
  }
}

All i get is constant random value (each time I restart the program it hangs on diffrent value)
img692.imageshack.us/.../69582651.gif
and it doesnt change. I know that variable will change rapidly, because of while(1), but even then there should be jitter value in logic analyzer, not constant value.

@Holger Fürstenberger
Can You compare and tell me what Im doing wrong?
What type of J-Link you have? Mine is V8 (non-trace).

Best regards,
Maciej Andrzejewski.

Unrelated question but why the manual reset to zero of the variable? Being an unsigned 8-bit variable, it will turn around anyway on next increment.