Application-specific flash options ignored: softreset does not work

RE: Application-specific flash options ignored: softreset does not work

droberson — Thu, 20 Mar 2025 19:42:38 GMT

Hey Dejan,

I couldn't find any additional information in the Cortex-M33 Technical Reference Manual, Cortex-M33 Generic User Guide, or the Cortex-M33 Processor Datasheet.

Based on my testing, I can program and debug fine with softreset enabled. Hopefully something doesn't bite me after we build boards.

Thanks,

Derek

RE: Application-specific flash options ignored: softreset does not work

dejans — Thu, 20 Mar 2025 10:48:15 GMT

Hi Derek,

[quote user="droberson"]

Well, the nRF Connect SDK nRF9151 sample projects toggle the reset line by default when programming or debugging. I would assume that this was chosen over 'softreset' for some reason? If not, can you confirm there is no foreseeable risk or disadvantage to using softreset instead of toggling the reset line when debugging an application?

Per the reset behavior link you provided (thanks!), it states that "Debug" is not reset when using softreset. Will this cause any issues if I use the 'softreset' flag in my settings.json when debugging? Is toggling the reset line necessary for flashing or debugging?

[/quote]

There is currently no additional information about this in our documentation. Maybe you could try to look at ARM Cortex-M33 CPU documentation. Please let me know if you have any further questions.

Best regards,
Dejan

RE: Application-specific flash options ignored: softreset does not work

droberson — Tue, 18 Mar 2025 18:31:50 GMT

Hey Dejan,

Thanks for your reply. After spending a couple more hours on it today, and typing up instructions to reproduce both cases per your request, I figured out how to make the instructions provided in the link in my original post work. The syntax of my app directory was incorrect. Sigh. Why does this stuff have to be so complicated 😅. I miss the days of dropdown menus in Keil uVision.

Anyway, for future reference for others, both of the following settings.json files within your local workspace will work to enable 'softreset'.

Method 1 (Contents of settings.json):

{
    "nrf-connect.applicationOptions": {
        "${workspaceFolder}": {
            "flash": {
                "softreset": true
            }
        }
    }
}

Method 2 (Contents of settings.json):

{
    "nrf-connect.flash.softreset": true
}

These settings can be combined with any other settings in your settings.json file.

Location of settings.json relative to the rest of the project files [Using the HTTPS client sample (nrf/samples/net/https_client) as an example]:

[quote userid="111786" url="~/f/nordic-q-a/119889/application-specific-flash-options-ignored-softreset-does-not-work/527881"]Which module do you use?[/quote]

Module:

[quote userid="73492" url="~/f/nordic-q-a/119889/application-specific-flash-options-ignored-softreset-does-not-work"]nRF9151 DK[/quote]

[quote userid="111786" url="~/f/nordic-q-a/119889/application-specific-flash-options-ignored-softreset-does-not-work/527881"]Which advantage/disadvantage do you think about, in terms of what? Can you provide additional details?[/quote]

Thanks,

Derek

RE: Application-specific flash options ignored: softreset does not work

dejans — Tue, 18 Mar 2025 14:51:19 GMT

Hi,

[quote user=""]Programming my board no longer asserts the reset line. I now see "Applying system reset" instead of "Applying pin reset" in the VS Code terminal window [/quote]

Can you show the output of VS Code terminal window in both cases and provide description for each case?

[quote user=""]Is the documentation incorrect? If not, why doesn't the documentation's method work for me?[/quote]

Can you specify expected behavior? In which way documentation might be right or wrong? Can you elaborate?

[quote user=""]Is there any issue or disadvantage to using 'softreset' for programming or debugging a nRF9151 module? Is there a preference?[/quote]

Which module do you use? Which advantage/disadvantage do you think about, in terms of what? Can you provide additional details?

[quote user=""]When using 'softreset', does this also reset the modem core, or is the modem core only reset via nRESET?[/quote]

There are various reset types described in the documentation. There you can also find information about reset behavior.

Best regards,
Dejan