RE: Adding Custom ili9341 Display to Zephyr Build

jemiaha — Tue, 05 Jul 2022 18:37:29 GMT

This is great! I can read into all this and sort out the best way to configure the display driver. The part that I wasn't seeing was placing the ILI9340 node as a child inside the SPI device node to assign it to that SPI port. I've seen examples of how to configure it in the code but the more portable (but more complex) way is to shift the entire configuration into Device Tree it it seems like that is what the ILI9340 driver is written for. I'll post back here with more questions when they come up. Thank you.

RE: Adding Custom ili9341 Display to Zephyr Build

Einarh — Mon, 04 Jul 2022 08:36:32 GMT

Hello!

I would recommend referring to Zephyr's Devicetree documentation for details on how the devicetree works and how to use it if you are unfamiliar with it:

https://docs.zephyrproject.org/latest/build/dts/howtos.html#set-devicetree-overlays

You could probably use this overlay as an example of how your devicetree node could look:

https://github.com/zephyrproject-rtos/zephyr/blob/main/boards/shields/adafruit_2_8_tft_touch_v2/dts/adafruit_2_8_tft_touch_v2.dtsi

Here they have added the screen as a sub-node of an spi node in the devicetree, which in turn also specifies what spi port is used.

Best regards,

Einar