Basic analog comparator code

[Viktor S.]

Hello,
I'm trying to get an analog comparator working on the nrf52833DK. I am using NRF Connect SDK version 2.2.0.
I have the following code:

#include <zephyr/kernel.h>
#include <nrfx_comp.h>

static void comparator_handler(nrf_comp_event_t event)
{
		printk("EVENT\n");
}

void main(void)
{

	uint32_t err;

	nrfx_comp_config_t comp_config = NRFX_COMP_DEFAULT_CONFIG(NRF_COMP_INPUT_1);
	comp_config.ext_ref = NRF_COMP_REF_VDD;


	nrfx_comp_event_handler_t comp_event_config = comparator_handler;

	err = nrfx_comp_init(&comp_config, comp_event_config);
	if (err != NRFX_SUCCESS)
	{
		printk("ERR comp init\n");
		return ;
	}

	nrfx_comp_start(NRFX_COMP_EVT_EN_UP_MASK, 0);

	while(1){
		k_msleep(1);
	}

}

At the moment when I would expect to execute the service routine, the device reboots.

*** Booting Zephyr OS build v3.2.99-ncs1 ***
*** Booting Zephyr OS build v3.2.99-ncs1 ***
*** Booting Zephyr OS build v3.2.99-ncs1 ***
*** Booting Zephyr OS build v3.2.99-ncs1 ***
*** Booting Zephyr OS build v3.2.99-ncs1 ***

Thank you for your help.

[runsiv]

Hi. 

I added 

CONFIG_LOG=y
CONFIG_LOG_PRINTK=y

to prj.conf to get some more error messages. and the system reboots due to unhandled interrupts. 

The problem is that when using only the nrfx driver, you will need to set up the interrupt handler yourself. There is an example on how to do this in this case  Using NRF_Connect Zephyr with the Comparator interrupt 

Regards

Runar

[Viktor S.]

Thank you, I used the code from the link and it works.

[runsiv]

Great to hear, I will mark this case as closed.

Regards 

Runar