nRF51822: extract line number and file name from app_error_fault_handler

RE: nRF51822: extract line number and file name from app_error_fault_handler

Sigurd — Mon, 13 Feb 2023 17:21:10 GMT

Hi,

[quote user="bojan"]Is that possible?[/quote]

No, info is just a pointer(RAM location) where you can find p_file_name and line_num stored. You need to "decode" it on-chip, and send file_name and line_num, instead of info.

RE: nRF51822: extract line number and file name from app_error_fault_handler

bojan — Mon, 13 Feb 2023 17:07:59 GMT

No.

Every device in the field should catch the id and info parameters of the app error fault and send those two over BLE to the smartphone/Server.

Then, on the Server side, I would like to somehow be able to get the line number and file name based on id and info parameters. Is that possible?

RE: nRF51822: extract line number and file name from app_error_fault_handler

Sigurd — Mon, 13 Feb 2023 17:03:26 GMT

[quote user="bojan"]Now that we know the id and info parameters on the Server side, how we can figure out the line number and the file name of the app error that caused the restart?[/quote]

Not sure I understand...You send the file_name and line the error occurred on to the other device, so you can read it there(?)

RE: nRF51822: extract line number and file name from app_error_fault_handler

bojan — Mon, 13 Feb 2023 16:31:37 GMT

Hi, Sigurd .

We can extract the line number and file name locally by applying the code you shared with us.

My question relates to the devices in the field. Imagine a scenario when some device restarts due to the app error fault. We are gonna:

Get the id and info parameters with the app_error_fault_handler() and the device will restart.
Once the device reboots and the BLE connection establishes, we are gonna transfer the id and info parameters to the Server.

Now that we know the id and info parameters on the Server side, how we can figure out the line number and the file name of the app error that caused the restart?

Regards,
Bojan.

RE: nRF51822: extract line number and file name from app_error_fault_handler

Sigurd — Mon, 13 Feb 2023 13:14:17 GMT

Hi,

The code in RE: nRF51822: Getting instruction address from the fault handlers shows how the line_num,p_file_name and and err_code is stored in m_error_data. But not all type of of errors have this information, e.g. hardfault.