samples: Bluetooth: hci_uart: Add vendor specific HCI event generation for system fatal error

[ppryga-nordic]

While using the hci_uart sample for Bluetooth conformance tests it may happen that there is a system fault error. Such errors are not visible in results of conformance tests. Debugging of these errors is difficult and requires access to testing hardware.

To enhance handling of such errors there is added a k_sys_fatal- _error_handler that will log information about CPU state by use of vendor specific HCI event.

Signed-off-by: Piotr Pryga [email protected]

[cvinayak]

@ppryga will this PR be updated?

[ppryga-nordic]

@cvinayak I plan to update it.

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[ppryga-nordic]

@Thalley thanks for reminding me about it. I'll find a spot to finish it in coming weeks.

[github-actions[bot]]

This pull request has been marked as stale because it has been open (more than) 60 days with no activity. Remove the stale label or add a comment saying that you would like to have the label removed otherwise this pull request will automatically be closed in 14 days. Note, that you can always re-open a closed pull request at any time.