nRF52810 -> nRF52805 firmware compatibility?

[Sydney]

If I have a firmware project working reliably on the nRF52810, is it possible to build a single firmware image that will run on both the nRF52805 and the nRF52810? I'm not using any of the peripherals that the nRF52805 loses from the nRF52810. I understand the pinout differences but I hope to be able to sort them out in the hardware design or to detect nRF52805 vs nRF52810 at boot and set the pinout accordingly.

I diffed many of the nRF52810 files in SDK 17.0.0 against their nRF52805 counterparts and didn't see much difference (beyond the missing peripheral registers), but maybe I'm missing something. I don't have access to actual nRF52805 hardware to simply try this, so I wondered if anyone here had any input.

Edit: It's maybe worth mentioning that I did see this post about developing for the nRF52805 (https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/developing-for-the-nrf52805-with-nrf5-sdk), but while it is helpful, it focuses on the differences between nRF52832 and nRF52805 rather than nRF52810 and nRF52805.

Thanks.

[Sydney]

Thanks. This is all really helpful. This is probably enough to consider this issue resolved, but I'd be interested if you've received or are expecting any feedback from your team about whether something like this has been tested internally.

[ovrebekk]

Hi Sydney

I have asked around here and there, but so far I haven't found anything. 

I will check in with a couple more people to be sure. 

One comment I got is that it is critical to ensure that the peripherals you use are located at the same address in the memory map, if you want to use the same code. If this is not the case you would need to run a runtime check that verifies the chip type, and changes the peripheral address based on this. 

Best regards
Torbjørn