SPI3 not in SDK14.2 how to realize support with registers

[Constantin]

Hi,

we have to stick to SDK 14.2 because our project is close to finish and we use C++ which is not good supported be SDK <15 due to the macros.

But still we would like to use the new features of SPI3 to extend the Baudrate to 32 Mhz. Is there anyway to get it running with this SDK. I've just found

some entries in the SDK but could not find any help in the forum.

Thanks and best regards,

Constantin

[awneil]

Sure, you can write directly to registers.

The registers are described in the Product Specification - so you will have to study that for details.

Just the same as with any other microcontroller.

You can look at how the SDK writes to registers to get you started ...

[Kenneth]

Hi,

I would think that adding the low level nrfx_spim driver from SDKv15 -> SDKv14 to use SPIM3 explicit should be possible with too much of work.

I am more worried about you are writing SDKv14.2 and nRF52840, please be aware that there are no production ready S140 softdevice compatible with SDKv14.2. So make sure you are going to production with a production ready softdevice (not alpha), ref:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/compatibility_matrix/nRF52840_ic_rev_sdk_sd_comp_matrix.html?cp=2_0_2_2 

Best regards,
Kenneth

[Constantin]

Okay good to know. But is there a problem to take the Softdevice from SDK 15.0 and use it with 14.2. The main reason why it is difficult to switch is due to the fact, that nordic SDK uses heavily C++ unconform Macro initialization of structs which produces millions of Compile errors and therefore I would need to change a lot of code of the SDK to make it compatible to our needs.

[Constantin]

Okay I've already tested and it did not work ... fatal error as expected.