How to use DCX SPI configuration in Zephyr !?

RE: How to use DCX SPI configuration in Zephyr !?

jakkra — Fri, 30 Jun 2023 21:38:04 GMT

Hi Esmaeill did you figure all of this out? I'm trying to optimize my watch (ZSWatch) display drawing and got to the same place as you that dcx is not supported in ncs/zephyr and I'd like to stay within Zephyr and not use nordics APIs directly.

RE: How to use DCX SPI configuration in Zephyr !?

Øyvind — Tue, 13 Jun 2023 12:49:18 GMT

You're welcome!

[quote user="Esmaeill"]It is possible SPI zephyr library automation control D/Cx pin like CS? or not implemented yet ?[/quote]

Could not find anything in our SDK. Did a quick search on the Zephyr Discord server, and found this thread discussing similar topic..

RE: How to use DCX SPI configuration in Zephyr !?

Esmaeill — Fri, 09 Jun 2023 18:21:18 GMT

Thanks 🌹.
It is possible SPI zephyr library automation control D/Cx pin like CS? or not implemented yet ?

RE: How to use DCX SPI configuration in Zephyr !?

Øyvind — Fri, 09 Jun 2023 07:36:10 GMT

Happy to help!

Don't forget to look at our nrfx_spim library, and the nrfx_spim_xfer_dcx() function

Kind regards,
Øyvind

RE: How to use DCX SPI configuration in Zephyr !?

Esmaeill — Thu, 08 Jun 2023 05:59:49 GMT

Thanks, it helped a lot.

in that sample, for control D/C pin of LCD Was used normal GPIO set/reset fanctions.

Since the related functions are not implemented, I think that using register values can help. Something similar to this:

// D/Cx Control
NRF_SPIM1->DCXCNT=0; //0x0-0xf
NRF_SPIM1->PSELDCX=(4<<0)|(0<<5)|(0<<31);//P0.4 Connect

But in the first attempt, the system restarts!!

Thanks for the help, I will probably look into this more in the future.

RE: How to use DCX SPI configuration in Zephyr !?

Øyvind — Mon, 05 Jun 2023 12:30:08 GMT

Hello,

I'm not familiar with the gc9a01 display, as this seems not be a part of the Zephyr environment. This means that there is no driver for this display. A quick Google search did bring me to the ZSWatch, which is a open-source watch running Zephyr and the gc9a01 display: https://github.com/jakkra/ZSWatch

Kind regards,
Øyvind