NRF52832: Disable all wakeup sources

RE: NRF52832: Disable all wakeup sources

Charlie — Mon, 08 Jul 2024 08:09:55 GMT

This configuration is highly customized by nrf chips, so there is no general Zephyr API generated for this purpose.

RE: NRF52832: Disable all wakeup sources

Rait — Fri, 05 Jul 2024 12:17:45 GMT

Thanks. However, as mentioned I am looking for a solution using Zephyr API without the need of reconfiguring individual pins.

RE: NRF52832: Disable all wakeup sources

Charlie — Fri, 05 Jul 2024 11:39:30 GMT

nrf_gpio_cfg(pin,

NRF_GPIO_PIN_DIR_INPUT,

NRF_GPIO_PIN_INPUT_DISCONNECT,

pull,

NRF_GPIO_PIN_S0S1,

NRF_GPIO_PIN_NOSENSE);

RE: NRF52832: Disable all wakeup sources

Rait — Fri, 05 Jul 2024 10:26:18 GMT

Can you please provide a code snippet?

RE: NRF52832: Disable all wakeup sources

Charlie — Fri, 05 Jul 2024 10:23:39 GMT

You can try to use GPIO configuration NRF_GPIO_PIN_NOSENSE to disable DETECT signal. This is the actual wake-up source from GPIO.

RE: NRF52832: Disable all wakeup sources

Rait — Thu, 04 Jul 2024 12:47:20 GMT

Thanks for the reply.

GPIO config does not have to survive a reset. The goal is to disable wakeup from any pin configured as input with interrupt(buttons etc.) and also keep the outputs as previously set. LPCOMP and NFC are not used.

Hoping to find a solution that does not involve reconfiguring all individual input pins.

Cheers

RE: NRF52832: Disable all wakeup sources

Charlie — Thu, 04 Jul 2024 12:38:46 GMT

Hi Rait,

You can not disable wakeup sources of System OFF mode. It is the lowest power mode you can achieve(0.3 μA at 3 V) and designed with following wakeup sources:
1. The DETECT signal, optionally generated by the GPIO peripheral

2. The ANADETECT signal, optionally generated by the LPCOMP module

3. The SENSE signal, optionally generated by the NFC module to “wake-on-field”

4. A reset

There is no chance GPIO can survive power on reset according to specification. GPIO will do initialization after power reset any way, but you can store and load configurations via settings subsystem.

You can find more information from nRF52832 Product Specification (nordicsemi.com).

Best regards,

Charlie