RE: nRF52832 POF (Power-fail comparator) usage on NCS platform

zero — Thu, 21 Mar 2024 03:31:30 GMT

Verification is feasible, thank you for your support

BR，

Zero

RE: nRF52832 POF (Power-fail comparator) usage on NCS platform

Einar Thorsrud — Wed, 20 Mar 2024 13:03:07 GMT

Hi,

[quote user=""]Is it possible to modify this way?[/quote]

What is it you want to modify?

[quote user=""]Why is this POFWARN not turned on by default in the nRF52832 code?[/quote]

POF warning is generally not enabled by default in any of our SDKs. It has a feature that you have described here, where flash writes are ignored (silently), which is sometimes not desierable. There is also no sample, but it can quite easily be used. I see you got it working, but another approach could be to add CONFIG_NRFX_POWER=y to your project configuration, and then do something like this:

#if CONFIG_NRFX_POWER
#include <nrfx_power.h>

void pof_cb(void)
{
	printk("POF event\n");
}

static void pof_enable(void)
{
	nrfx_power_pofwarn_config_t pof_config = {
		.handler = pof_cb, 
		.thr = NRF_POWER_POFTHR_V22,
		.thrvddh = NRF_POWER_POFTHRVDDH_V29
	};

	nrfx_power_pof_init(&pof_config);
	nrfx_power_pof_enable(&pof_config);
}
#endif