Posts by rabbitlennon

rabbitlennon · RP2040 hardware breakpoint rabbitlennon May 23, 2025 at 11:52 PM

It looks like Ozone cannot place hardware breakpoint on RP2040. It always fails on RPI PICO. As a result, the code cannot stop at the main function after the target is reset. My guess is that the bootloader messes up with software breakpoint installation.

rabbitlennon

arm-none-eabi-objcopy -v -O binary XXX.axf XXX.bin
Then flash XXX.bin.

rabbitlennon · [SOLVED] SWO incorrect decoding rabbitlennon May 24, 2020 at 8:20 AM

I found nowhere talking about parity checking in the SWO protocol. Also, I ran the swostability unity shipped with JLink Commander and it encountered numerous errors too. So I suppose it will just happen and no straightforward solutions here?

rabbitlennon · [SOLVED] SWO incorrect decoding rabbitlennon May 22, 2020 at 8:18 AM

Hi there,

I am using ITM to generate some information about software execution. Using Jlink SDK, everything works pretty well except that occasionally some packets are incorrectly decoded, resulting wrong data or unknown packets. It turned out the problem is not caused by the bandwidth limit, because when I decreased the SWO frequency (obtained from the compatible list), it works equally fine. I also make sure that the target ITM buffer is available before sending any ITM data. So overflow should not be possible (and no overflow packets was detected either).

What are possible reasons for this? And is there any solutions? Thanks!

rabbitlennon · [SOLVED] Jtrace on NuMaker PFM-M2351 rabbitlennon August 20, 2019 at 5:17 PM

Thank you very much!

rabbitlennon · [SOLVED] Jtrace on NuMaker PFM-M2351 rabbitlennon August 19, 2019 at 4:02 PM

Hi there,

Can I know if JTrace can support the NuMaker PFM-M2351 board out-out-box? The board has a cortex debug+ interface, but I didn't find information on the tested device page (https://www.segger.com/products/debug…tested-devices/).

https://direct.nuvoton.com/en/numaker-pfm-m2351

Moreover, can anyone confirm if the board has ETB support?

Thanks!

rabbitlennon · [SOLVED] ETM on LPC55S69 EVK board rabbitlennon August 19, 2019 at 3:56 PM

Thank you Nino. You are really helpful.

rabbitlennon · [SOLVED] ETM on LPC55S69 EVK board rabbitlennon August 18, 2019 at 10:20 PM

Currently, Ozone reported the following coresight components:

CoreSight components:
ROMTbl[0] @ E00FE000
ROMTbl[0][0]: E00FF000, CID: B105100D, PID: 000BB4C9 ROM Table
ROMTbl[1] @ E00FF000
ROMTbl[1][0]: E000E000, CID: B105900D, PID: 000BBD21 Cortex-M33
ROMTbl[1][1]: E0001000, CID: B105900D, PID: 000BBD21 DWT
ROMTbl[1][2]: E0002000, CID: B105900D, PID: 000BBD21 FPB
ROMTbl[1][3]: E0000000, CID: B105900D, PID: 000BBD21 ITM
ROMTbl[0][1]: E0040000, CID: B105900D, PID: 000BBD21 Cortex-M33

I suppose there at least should be an ETM module available, because the ETM module is advertised in the product manual.

rabbitlennon · [SOLVED] ETM on LPC55S69 EVK board rabbitlennon August 18, 2019 at 5:52 AM

Hi there,

I have a LPC55S69 EVK board and wanted to use the Jtrace to get the instruction trace. Since no trace pin is available on the board, I thought setting trace source to be "trace buffer" should work. Unfortunately, it is not allowed in OZone. I wonder if this is a hardware issue or software issue. More specifically, Is it because the hardware lacks the ETM/ETB support or the JLINK software hasn't supported it yet?

Thank you very much!

rabbitlennon · [SOLVED] Ozone ETM trace limit rabbitlennon July 20, 2019 at 12:22 AM

Quote from SEGGER - Nino

You can get around this by exporting the instruction trace data after each stop.
This can also be automated.
See here for more details:
wiki.segger.com/Automated_Tests_with_Ozone

Thanks for the guide. I used Trace.ExportCSV() to export a file on every breakpoint. However, the file name can only be provided with a constant string. Any way to give a distinct file name on each invocation of Trace.ExportCSV()? For example, a self-increasing static/global integer which can be converted to a char string. I checked the documentation of the Script file language but didn't find any workaround.

rabbitlennon · [SOLVED] Ozone ETM trace limit rabbitlennon July 19, 2019 at 4:56 PM

Quote from SEGGER - Nino

2: Currently not possible.

If I buy SDK now, can I get a free update with that feature?

rabbitlennon · [SOLVED] Ozone ETM trace limit rabbitlennon July 19, 2019 at 4:19 PM

Hi Nino,

Thanks for the reply.

Quote from SEGGER - Nino

We are currently working on expanding Ozone and J-Trace PRO so you can select to buffer more data into either your host PCs RAM or to one or multiple trace files.

1: Do I need a new J-Trace POR hardware to use this feature?
2: Can I use the SDK to save the trace to files already?

Thanks!

rabbitlennon · [SOLVED] Ozone ETM trace limit rabbitlennon July 19, 2019 at 6:27 AM

Hello,

It seems there is a hard limit on the captured instructions. In my case, the number of instructions is limited at around 67M, even though I set "Maximum instruction count" to 10G. I wonder if this is a hard limit or something configurable elsewhere.

In addition, whenever I stop the target, previous trace is lost. Is there an option to retain previous trace when resuming at break point?

Thanks!

rabbitlennon · [SOLVED] Jlink SDK ETM and ITM support rabbitlennon July 19, 2019 at 6:21 AM

Hello,

I need to capture both ETM and ITM trace at the same time. If I understand correctly, if trace pins are used, both ETM and ITM data are routed to J-trace. However, in the manual of Ozone, it is state that "The simultaneous use of multiple trace data channels in Ozone is currently not supported". Here I think data channels refer to trace pins/trace buffer/swo.

My question is, if I chose trace pins, can I get instruction trace and ITM data simultaneously in Ozone? If not, is it supported in SDK?

Thanks!