Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

Vidar Berg — Wed, 16 Nov 2022 16:08:50 GMT

Please see my post here: sd_softdevice_enable HardFault

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

kwigulaker — Wed, 16 Nov 2022 13:29:38 GMT

How would you go about debugging something like this? Where the softdevice points to another segment without any function name?

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

kwigulaker — Wed, 16 Nov 2022 13:24:13 GMT

Aha, now I can see its when calling a function that the softdevice enable method is causing an exception, let me look more into this.

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

Vidar Berg — Wed, 16 Nov 2022 13:20:02 GMT

The stack pointer is correct now and the call stack shows that your program is reaching main().

I can tell what function is causing the exception because the call stack view is cropped.

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

kwigulaker — Wed, 16 Nov 2022 13:11:03 GMT

Here, I am not quite sure what to look at, this is after debugging and running.

Let me know if there's anything else to try and find.

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

Vidar Berg — Wed, 16 Nov 2022 12:36:51 GMT

Try to read out the initial stack pointer value @ 0x27000 to see what it's set to now. You can use the memory window in Segger for this. Alternatively, with nrfjprog:

$ nrfjprog --memrd 0x27000

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

kwigulaker — Wed, 16 Nov 2022 12:34:26 GMT

This seems very logical, however I still receive the stopped by vector catch phrase in the debug terminal when running, and I have LED5 blinking whenever I attempt to read the NRF_LOG info with either RTT viewer or Segger, do you have any advice on how to remedy this?

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

Vidar Berg — Wed, 16 Nov 2022 12:11:38 GMT

Thanks. I was able to download your attachment from google drive now. Turns out the problem was related to incorrect linker settings, as you suspected. In your case, the RAM_PH_START symbol was configured with an offset from where the RAM memory region actually starts, which caused the initial stack pointer value to become invalid.

The fix is to set the RAM_PH_START symbol to 0x20000000 (Memory map) here:

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

kwigulaker — Wed, 16 Nov 2022 11:29:26 GMT

I was unable to reupload the .zip directly to the post, does Google Drive work?

Below is a share link to where I've uploaded the augmented thread example as a .zip.

(EDIT: it seems the file was uploaded to the post anyway, so either link should work the same)

https://drive.google.com/file/d/1Re8y3IvUR5q2HL89PqwD_BpJmVwGwhLA/view?usp=share_link

RE: Stopped by vector catch when attempting to debug NRF52840 using modified Thread Example

Vidar Berg — Wed, 16 Nov 2022 10:46:27 GMT

Hello,

Could you please re-upload the project as a .zip? I get a checksum error when I try to extract the .rar you uploaded for some reason.

Best regards,

Vidar