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trace - logic analyzer

ema vac

I'm using keil with STLINK, connected to a GD32F130C8.

I can see, in debug, by means of Watch, variables changing in real time.

Everything works fine.

Now I would like to enable trace, in order to see the evolution of a variable in time domain, thru logic analyzer.

I enabled trace flag on trace tab (setting menu), I set, on trace tab, the processor speed (72MHZ).

The problem is that logic analyzer doesn't show requested float variable, and on the bottom of the screen I read the sentence "Trace: No Synchronization".

The output of SystemCoreClock() function gives 72Mhz.

any hint?

Parents
  • 0 in reply to ema vac

    For that example, you can look at the schematics and/or the User Manual of the board.

    ema vac said:
    looking at darasheet of my processor, I can’t find any reference to SVW or SWO

    As I asked before, what makes you think that your processor does support it?

    You would need to contact the chip manufacturer for specific details ...

Reply
  • 0 in reply to ema vac

    For that example, you can look at the schematics and/or the User Manual of the board.

    ema vac said:
    looking at darasheet of my processor, I can’t find any reference to SVW or SWO

    As I asked before, what makes you think that your processor does support it?

    You would need to contact the chip manufacturer for specific details ...

Children
  • 0 in reply to Andy Neil

    In the user manual of gd32 processor I can also read the following:

    The CortexTM-M3 processor is based on the ARMv7 architecture and supports both Thumb and Thumb-2 instruction sets. Some system peripherals listed below are also provided by CortexTM-M3:
     Internal Bus Matrix connected with I-Code bus, D-Code bus, System bus, Private Peripheral Bus (PPB) and debug accesses (AHB-AP)
     Nested Vectored Interrupt Controller (NVIC)
     Flash Patch and Breakpoint (FPB)
     Data Watchpoint and Trace (DWT)
     Instrumentation Trace Macrocell (ITM)
     Serial Wire JTAG Debug Port (SWJ-DP)
     Trace Port Interface Unit (TPIU)

  • 0 in reply to ema vac
    ema vac said:
    Search “trace” on this page

    The only mention of trace on that page is saying that you can use the ULINK-pro - which has trace capability.

    It doesn't say that the chip has trace capability.

    ema vac said:
    In the user manual of gd32 processor I can also read

    Again, for clarification of their documentation, and/or their chip's features & capabilities - you need to contact them.