SPI implementation difference between SDK

RE: SPI implementation difference between SDK

choehyunho — Mon, 31 May 2021 15:51:51 GMT

After reviewing my write & read SPI codes, I found some difference between the two versions.

Fixing it solves the problem.

Thanks for your advices.

RE: SPI implementation difference between SDK

awneil — Mon, 31 May 2021 08:36:10 GMT

[quote userid="88182" url="~/f/nordic-q-a/75750/spi-implementation-difference-between-sdk/312563#312563"]SPI is not working[/quote]

again, Have you used an oscilloscope to see what (if anything) is actually happening on the wires?

RE: SPI implementation difference between SDK

choehyunho — Mon, 31 May 2021 08:33:41 GMT

I have found the cause of the first problem.

uart1 device node is affecting to the setting, and after disabling it, it works well as expected.

Thanks for your advice.

But still the whole communication via zephyr SPI is not working, and I am investigating each communication process.

Is there any advice regarding difference between NRFX_SPIM and zephyr-ported SPI?

And, BTW, SPI3 is defined in DTS, but not exists in nRF52 SDK. SPI3 is different from SPI0/1/2?

RE: SPI implementation difference between SDK

awneil — Fri, 28 May 2021 09:12:25 GMT

[quote userid="88182" url="~/f/nordic-q-a/75750/spi-implementation-difference-between-sdk"]In nRF52 SDK, it works with NRFX_SPIM driver and uses SPI_MODE0. But In nRFConnect 1.5.1 SDK, I should use NRFX_SPIM driver and NRF_SPI_MODE_1 to make it work correctly.[/quote]

Have you used an oscilloscope to see which mode is actually being implemented?