topic Re: [MCX-N9XX-EVK] LCD issue in MCX Microcontrollers

[MCX-N9XX-EVK] LCD issue

bryan_hong — Wed, 02 Jul 2025 02:24:49 GMT

dear nxp

As you can see in the LCD screen capture below, the output appears abnormal.

According to the document 'lvgl_examples_readme.md' included in the SDK, the MCX-N9XX-EVK is supposed to support the LCD-PAR-S035. Kindly review this issue.

and I use below SDK and project

Thanks,
Bryan

Re: [MCX-N9XX-EVK] LCD issue

Harry_Zhang — Wed, 02 Jul 2025 08:57:34 GMT

Hi @bryan_hong

May I ask if the demo of mcxn9xxevk_lvgl_guider can be displayed normally?

Harry

Re: [MCX-N9XX-EVK] LCD issue

bryan_hong — Thu, 03 Jul 2025 05:59:48 GMT

dear Harry

The same result is presented with 'mcxn9xxevk_lvgl_guider_bm_cm33_core0'. Please refer to the image and the link below. Additionally, 'frdmmcxn947_lvgl_demo_benchmark_bm_cm33_core0' also shows the same result. I'm currently testing while modifying 'fsl_st7796s.c'.

It's strange that the example isn't working—are there any clues we should check to investigate further?

Thanks,
Bryan

Re: [MCX-N9XX-EVK] LCD issue

Harry_Zhang — Fri, 04 Jul 2025 02:56:09 GMT

Hi @bryan_hong

I tested the mcxn9xxevk_lvgl_guider ( SDK_2_16_000_MCX-N9XX-EVK), it can work.

You can test it.

And i also tested the 'mcxn9xxevk_lvgl_guider_bm_cm33_core0'.

It can not work.

I will report it to our SDK team.

Thanks for your information.

Harry

Re: [MCX-N9XX-EVK] LCD issue

bryan_hong — Mon, 07 Jul 2025 00:46:23 GMT

dear

I can not found `mcxn9xxevk_lvgl_guider` as below.

and Your SDK version differ from me.

Could you guide to me how to install same SDK you use and how to get `mcxn9xxevk_lvgl_guider ` you use ?

Thanks,
Bryan

Re: [MCX-N9XX-EVK] LCD issue

Harry_Zhang — Mon, 07 Jul 2025 03:13:15 GMT

Hi @bryan_hong

1. first, you need to download the 2.16 SDK.

Select Board | MCUXpresso SDK Builder

2. And import the downloaded SDK.

3. Then import the mcxn9xxevk_lvgl_guider demo.

Harry

Re: [MCX-N9XX-EVK] LCD issue

bryan_hong — Mon, 07 Jul 2025 04:10:46 GMT

thanks for your quick comments

I have installed as below.

But How to execute #3

3. Then import the mcxn9xxevk_lvgl_guider demo.

Thanks,
Bryan

Re: [MCX-N9XX-EVK] LCD issue

bryan_hong — Mon, 07 Jul 2025 04:19:19 GMT

I have founded as below.

Re: [MCX-N9XX-EVK] LCD issue

bryan_hong — Mon, 07 Jul 2025 04:36:56 GMT

dear Harry

Please let me know once the following action have been completed.

And i also tested the 'mcxn9xxevk_lvgl_guider_bm_cm33_core0'.

It can not work.

I will report it to our SDK team.

Thanks,
Bryan

Re: [MCX-N9XX-EVK] LCD issue

bryan_hong — Tue, 08 Jul 2025 02:19:18 GMT

Hi Harry

Yes, LCD work!!!

If the test for is completed, Could you inform me via email ?

-- The test is to check whether 'mcxn9xxevk_lvgl_guider_bm_cm33_core0' works in SDK 24.12.00.

Thanks,
Bryan