nRF52849 - SPIM: problem using 3 instances

RE: nRF52849 - SPIM: problem using 3 instances

ovrebekk — Tue, 19 Oct 2021 12:16:55 GMT

Great to hear you figured it out. I will consider the case resolved then 🙂

Best regards
Torbjørn

RE: nRF52849 - SPIM: problem using 3 instances

Kostic — Mon, 18 Oct 2021 20:31:17 GMT

Thanks for your support! The problem was related to configuration of SPIM0..3 instances (conflict between SDK code and certain things that we overrode).
So, nRF / SDK works fine!

RE: nRF52849 - SPIM: problem using 3 instances

ovrebekk — Thu, 26 Aug 2021 12:11:29 GMT

Just let me know how the test turns out.

Are you able to share your sdk_config.h file with me?

Best regards
Torbjørn

RE: nRF52849 - SPIM: problem using 3 instances

Kostic — Wed, 25 Aug 2021 20:03:52 GMT

Thanks for the reply!
1. We are using SPI0 + SPI2 + SPI3 + TWI1. So, based on your comment this config should work.
2. Device #3 is on SPI2 instance. In other words, SPI0 + SPI3 + TWI1 works fine. But when we add SPI2 - nothing happens on SPI2 bus (no issues with other instances, and no driver errors).
3. I tried to hook up device 3 to instance SPI3 (and disable SPI2) - it works ok then. But I haven't tried just to disable SPI0 or SPI3 to see if SPI2 then works. Will try!

RE: nRF52849 - SPIM: problem using 3 instances

ovrebekk — Wed, 25 Aug 2021 10:51:23 GMT

Can you let me know which peripheral instances you are using, and what the instance is for the '3rd device'?

Are you able to use the 3rd device if you disable one of the other peripherals?

1. No, this should be possible, as long as you use TWIM0 with SPIM1, 2 and 3, or TWIM1 with SPIM0, 2, and 3.

2. Yes, all the EasyDMA channels are dedicated to their own peripheral. There is no sharing of EasyDMA channels between multiple peripherals.

3. This is not a known issue with SDK v15.

Best regards
Torbjørn