RE: NRFX SPIM RX Buffer Remains Empty

jopayne24 — Fri, 25 Feb 2022 20:47:34 GMT

Hi Edvin

Yes, the SPI mode is correct. As I mentioned above, in reference to the logic analyzer images, everything looks perfect, the data is being read, and the traffic patterns mirror those I get when using Zephyr APIs - its simply that the count data isn't being written to my receiver buffer. I did cycle through the different SPIM instances (and even cycled through the different SPI modes - just in case); however, the problem persisted. I'll continue to explore as time permits - I'm sure it's something silly I'm overlooking. Thanks for your help.

RE: NRFX SPIM RX Buffer Remains Empty

Edvin — Mon, 31 Jan 2022 14:17:54 GMT

Hello,

It is a bit difficult for me to test this, because I don't have your SPI device.

Did you check that you are using the correct SPI mode in your spi_config? It should be quite quick to check all the modes.

The zephyr implementation is using the nrfx drivers ultimately, so there is no particular reason why it wouldn't work.

There is nothing from the log indicating that it shouldn't work, right? There are no errors (from your main.c) being printed?

for debugging purposes, does the behavior change if you try to use another SPIM instance? I understand that you want to use SPIM3 for the speed, but for testing, can you try to use SPIM0?

Best regards,

Edvin