nRF5340 SPI frequency setting

RE: nRF5340 SPI frequency setting

MartaOp — Wed, 16 Sep 2020 10:09:53 GMT

I'm fine with a workaround for now. Thank you :)

Thanks,

Marta

RE: nRF5340 SPI frequency setting

Simon — Wed, 16 Sep 2020 10:08:06 GMT

Is it possible to use this workaround? Or would you like me to help you to implement the solution from the master branch?

Best regards,

Simon

RE: nRF5340 SPI frequency setting

MartaOp — Fri, 11 Sep 2020 12:12:55 GMT

Of course when I change if statements directly in the function it all works ;)

Thanks,

Marta

RE: nRF5340 SPI frequency setting

MartaOp — Fri, 11 Sep 2020 11:14:49 GMT

Hi,

It's not working with v1.3.0 of SDK (the one that still have CONFIG_SOC_NRF52840), because CONFIG_SOC_NRF5340_CPUAPP is not included and CONFIG_SOC_NRF52833 and CONFIG_SOC_NRF52840 are not user-configurable.

When I tried to update it to newer version my Segger studio just stopped working at all. After a few reinstallations it's working again but with the v1.3.0 SDK.

Best,

Marta

RE: nRF5340 SPI frequency setting

Simon — Thu, 10 Sep 2020 07:36:21 GMT

The reason you're only getting 8MHz is because of this function. If you look inside it, it will only allow high frequencies if either CONFIG_SOC_NRF52833 or CONFIG_SOC_NRF52840 is defined, but according to the documentation nRF5340 should also be here. It seems like this is fixed in the master branch, where it looks for SPIM_FREQUENCY_FREQUENCY_M32 instead.

I guess you can fix this by either using the master branch or adding CONFIG_SOC_NRF5340_CPUAPP to the function.

Best regards,

Simon