Handling resets with HCI SPI

RE: Handling resets with HCI SPI

Øivind — Wed, 29 Jun 2022 14:59:13 GMT

I've spoken to a developer and I believe modifying the hci spi driver to use NETWORK.FORCEOFF instead should work.

You can disable uart in the devicetree using an overlay file.
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.0.0/zephyr/build/dts/howtos.html

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.0.0/zephyr/build/dts/intro.html#dt-input-files

RE: Handling resets with HCI SPI

Abraham Hamidi — Tue, 28 Jun 2022 19:07:22 GMT

Thanks. It will probably work now that I see it's a shared register, but I'll wait for a response. If that is the case, then I will make a PR to sdk-nrf that checks if CPUNET is enabled. By the way, since ENABLE_CPUNET is required to release FORCEOFF, how can I make that not allocate gpio for UART, since I'm not using UART? I think right now all that can be done is to disable serial and hope the generate stubs don't interfere with anything. I might patch that code to check CONFIG_SERIAL.

RE: Handling resets with HCI SPI

Øivind — Tue, 28 Jun 2022 14:57:09 GMT

Hi,

At first glance it looks like using FORCEOFF instead of the reset pin should work. I will ask the developers and get back to you.