nreset 0.18 disable

RE: nreset 0.18 disable

Einar Thorsrud — Fri, 30 Aug 2024 10:41:53 GMT

The reset button on the DK is connected to the onboard debugger, and will reset the nRF via the debugger. This is independen of the reset pin on the nRF.

[quote user="xuezhi_zed"]or is there any other method to check if i change 0.18 from reset to a normal GPIO correctly? [/quote]

The simplest which I use is to connect a jumper wire from P0.18 to GND and release it again (pin reset is active low with an internal pull-up). If that resets the device, pin reset is enabled. If not, it is not enabled.

[quote user="xuezhi_zed"]After i done so, it should be able to use as CS pin for spi communication right?[/quote]

Yes

RE: nreset 0.18 disable

xuezhi_zed — Fri, 30 Aug 2024 09:23:55 GMT

Hi Einar, if i disabled the reset correctly, when I press the ifboot/reset button on nrf52840dk , there should be no action right?

or is there any other method to check if i change 0.18 from reset to a normal GPIO correctly?

After i done so, it should be able to use as CS pin for spi communication right?

RE: nreset 0.18 disable

xuezhi_zed — Wed, 28 Aug 2024 09:17:09 GMT

Thank you!!!!

RE: nreset 0.18 disable

Einar Thorsrud — Wed, 28 Aug 2024 09:15:24 GMT

For the second step the simplest is to use the GUI in VS Code. Go to File -> Preferences -> Settings, search for "nrf-connect.flash.softreset" and tick the box. As shown here:

...

RE: nreset 0.18 disable

xuezhi_zed — Wed, 28 Aug 2024 09:02:13 GMT

yes i understand the first step, I want to ask where to put the 2nd step

you mentioned put the below piece of code in VS Code configuration , may I ask which file ?

"nrf-connect.applicationOptions": {
    "/home/eith/ncs/v2.5.0/zephyr/samples/basic/blinky": {
    "flash": {
    "softreset": true,
    "skipBuild": false
}
}
}

RE: nreset 0.18 disable

Einar Thorsrud — Wed, 28 Aug 2024 08:59:06 GMT

Hi,

The simplest is probably to make a file called app.overlay in your project folder (the same folder where you have prj.conf and CMakeLists.txt, and in that file add just this:

&uicr {
        /delete-property/ gpio-as-nreset;
    };

PS: If you have your own board files for your custom board you can also just remove gpio-as-nreset from the .dts file for your custom board.

RE: nreset 0.18 disable

xuezhi_zed — Wed, 28 Aug 2024 08:54:21 GMT

sorry for asking this dumb question

1. add this in the overlay file
&uicr {
/delete-property/ gpio-as-nreset;
};

2. where to add this ? CMakeLists.txt ? or launch.json? or some other files in VSCode?

or can i add nrf-connect.flash.softreset=y to extra cmake arguments in build configuration on vscode?

"nrf-connect.applicationOptions": {
"/home/eith/ncs/v2.5.0/zephyr/samples/basic/blinky": {
"flash": {
"softreset": true,
"skipBuild": false
}
}
}

launch.jason

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "nrf-connect",
            "request": "launch",
            "name": "Launch the active build configuration",
            "config": "${activeConfig}",
            "runToEntryPoint": "main"
        }
    ]
}

RE: nreset 0.18 disable

Einar Thorsrud — Tue, 27 Aug 2024 07:40:29 GMT

Hi,

There are two things that needs to be adressed in order to not use pin reset.

The first is to don't enable pin reset in your firmware. You describe CONFIG_GPIO_AS_PINRESET=n but that is deprecated, so if using a recent SDK release (>= v2.5.0) you need to adjust your devicetree as explained in this post.

The second is that when programming west flash needs to be called with the "--softreset" option. If calling it direclty, just add that option. If programming from nRF Connect for VS Code, set "nrf-connect.flash.softreset": true in your VS Code configuration.