LPCOMP in NCS-Zephyr on NRF52

RE: LPCOMP in NCS-Zephyr on NRF52

Christian Holland — Fri, 19 Feb 2021 17:02:04 GMT

Thankyou Kenneth! It works perfectly. I did have to create my own

nrfx_lpcomp_config_t

config in order to change the reference voltage because it was too high.

Appreciate your help.

RE: LPCOMP in NCS-Zephyr on NRF52

Kenneth — Thu, 18 Feb 2021 18:13:49 GMT

You may try this:

devzone.nordicsemi.com/.../lpcomp.zip

RE: LPCOMP in NCS-Zephyr on NRF52

Christian Holland — Thu, 18 Feb 2021 09:19:04 GMT

Thanks for your help Kenneth,

I decided which parameters to use just from looking at the documentation; it might have been incorrect. I tried to use IRQ_DIRECT_CONNECT(COMP_LPCOMP_IRQn,..). as you say, but it seems that simply adding this stops the program from starting at all for some reason. I have set CONFIG_NRFX_LPCOMP=y in prj.conf already, and I've looked at that article but I don't really understand it much because their interrupt handler nrfx_spim_1_irq_handler isn't defined in the same C file so one would assume they're using a default interrupt handler... either way I have tried what they suggested to no avail.

Is it possible for you to setup a simple LPCOMP sample in Zephyr? This doesn't exist yet, and would be VERY useful for myself and the community to understand how to get it working as there's nothing like it at the moment

RE: LPCOMP in NCS-Zephyr on NRF52

Kenneth — Wed, 17 Feb 2021 18:01:31 GMT

Where do you get those parameters that is passed to IRQ_DIRECT_CONNECT() from? I would think you should use IRQ_DIRECT_CONNECT(COMP_LPCOMP_IRQn,..).

I haven't used LPCOMP in zephyr, but you may find this useful:
https://devzone.nordicsemi.com/f/nordic-q-a/66488/using-spi-with-ppi-in-zephyr/272139#272139

You may also need to set CONFIG_NRFX_LPCOMP=y in your prj.conf

RE: LPCOMP in NCS-Zephyr on NRF52

Christian Holland — Wed, 17 Feb 2021 16:06:14 GMT

Just tried it; same issue, still fatally crashes

RE: LPCOMP in NCS-Zephyr on NRF52

Kenneth — Wed, 17 Feb 2021 16:01:05 GMT

Can you try to use IRQ_DIRECT_CONNECT().

Kenneth

RE: LPCOMP in NCS-Zephyr on NRF52

Christian Holland — Wed, 17 Feb 2021 15:39:46 GMT

I have tried adding a IRQ_CONNECT call but the crash still occurs:

IRQ_CONNECT(4, 2, lpcomp_event_handler, NULL, 0);