Initiating Hardware Reset Through Software on 9160

[jake11212]

Hello,

I want to build in a reset function for handling certain error states on the 9160DK running nRF Conenct 1.6.0.  In the datasheet it appears that nRESET is p0.32 and is active low.  I checked in the .dts file and saw that there was not a pin 0.32 and also no reset device bound, so was not sure how to go about pulling the pin low to initiate the reset.

Is it possible to initiate a reset this way, and if so how do I go about it?  Do I need to create a custom device in the .dts file assigned to p0.32 and then pull it low?  Is it possible to pull a pin low without binding it in the device tree?  

Thanks!

[Menon]

Hello,

In the datasheet it appears that nRESET is p0.32 and is active low

I think you got mixed up with 9160 Soc and  9160DK datasheet.

Can you confirm, how you want to trigger the reset?. Hardware or through software

Kind Regards,

Abhijith

[jake11212]

I want to initiate it from the software but I was planning to do that through pulling the reset pin to be active.  Is there a better way to go about this?

[Menon]

Hello,

The pin your are refering to (p0.32) is dedicated Soc pin as stated here. So you cannot find this pin in 9160DK.

For doing a reset you can call the function sys_reboot(). Take a look at this page which will give you more idea on sys_reboot(). And you can refer to this sample which uses sys_reboot().

Kind Regards,

Abhijith

[jake11212]

This worked, thank you!

So by it being a dedicated SoC pin that means that it cannot be accessed?  Would it be possible to pull a reset pin to trigger the reset?

[Menon]

Hello,

Glad to hear it worked.

jake11212 said:

So by it being a dedicated SoC pin that means that it cannot be accessed?  Would it be possible to pull a reset pin to trigger the reset?

Dedicated SoC pin means you cannot physically see that pin in your DK. This pin is configured as Reset button(SW5) in your 9160DK. Details about using the nReset button in the SoC is well defined here.

Kind Regards,

Abhijith