How to use SPI on nRF9160DK

RE: How to use SPI on nRF9160DK

Håkon Alseth — Fri, 07 Jun 2019 10:45:12 GMT

Hi Linus,

This is a very good spot. Thank you very much!

I have no idea how I've managed to make this mistake, or how this sample has even worked at my end!

I'll correct it asap.

Kind regards,

Håkon

RE: How to use SPI on nRF9160DK

Linus — Fri, 07 Jun 2019 09:22:58 GMT

I have the same tags in my repos. I have tried to rebuild everything, but the problem remained.

I tried to debug it using 'west debug', but for some reason the code refuses to run in the debugger.

However, using printk() I found out that the SPI pins were not changed, even though the .overlay file in the SPI example was correct. Then I noticed that the symlink 'nrf9160_pca10090_ns.overlay' doesn't match the board name. I renamed it to 'nrf9160_pca10090ns.overlay' and voila! Now it works!

The question now is why it worked for you. Don't you have the same overlays?

Regards,

Linus

RE: How to use SPI on nRF9160DK

Håkon Alseth — Thu, 06 Jun 2019 07:22:29 GMT

Here's my repo's (atleast the one's used in this example):

"nrf" is checked out with tag "v0.4.0"

"zephyr" is checked out with tag "v1.14.99-ncs1"

"nrfxlib" is checked out with tag "v0.4.0"

Cheers,

Håkon

RE: How to use SPI on nRF9160DK

Linus — Wed, 05 Jun 2019 14:28:06 GMT

Thank you for the hex file. It turns out that it works fine with that one. Was that built with the v0.4.0 release?
I'll try to rebuild everything from scratch and see if that helps.

Regards,

Linus

RE: How to use SPI on nRF9160DK

Håkon Alseth — Wed, 05 Jun 2019 13:44:49 GMT

That is strange. You haven't changed the SPI pins right? If so, you might have to clean your build folder, then re-import / run cmake again.

Could you see if its still silent using this hex? devzone.nordicsemi.com/.../merged.hex

Note: it only sends one byte every sec, and CSN + MISO is floating. So, check the MOSI and CLK line if you're going to scope something.

Cheers,

Håkon

RE: How to use SPI on nRF9160DK

Linus — Wed, 05 Jun 2019 12:24:15 GMT

That was the first thing I tried. When that didn't work, I hooked up an oscilloscope and noticed that all the SPI pins are silent.

RE: How to use SPI on nRF9160DK

Håkon Alseth — Wed, 05 Jun 2019 11:00:22 GMT

Hi Linus,

Could you connect MISO to MOSI (default P0.11 and P0.12) and see if it echo'es back the byte in the terminal?

Kind regards,

Håkon