i.MX RT Crossover MCUsのトピックRe: i.MX RT eLCDIF RGB Mode Use Case

i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Wed, 27 Nov 2019 19:49:46 GMT

I have run the evkmimxrt1060_elcdif_rgb example on my imx RT1060 dev board. Then I modified it based on this doc so that I can run the demo on a 1280x800 LCD: https://www.nxp.com/docs/en/application-note/AN12302.pdf

after the modifications I did I get this message:

This is how I configured my memory:

Re: i.MX RT eLCDIF RGB Mode Use Case

kerryzhou — Thu, 28 Nov 2019 07:26:56 GMT

Hi Andre marcus ,

Thanks for your new question.

Do you test the SDK code directly, just the following project:

SDK_2.6.2_EVK-MIMXRT1060\boards\evkmimxrt1060\driver_examples\elcdif\rgb

You said, you have modify it, except the memory linker, any other modified points?

What's the board you are using? MIMXRT1060-EVK?

Where you get the 1280x800 LCD? From NXP side? If yes, please give me the link.

Please help to confirm it, then I will test it.

Have a great day,
Kerry

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Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Thu, 28 Nov 2019 08:18:04 GMT

Hi!

im using this lcd Innolux LCD Original Module Ej101ia-01g Resolution 1280X800 40pin Lvds 10.1' with Brightness 350nits - China Innolux LCD…

i modified the example code based on the recommended changes given in the application note I sent you you on my previous message; it appears to me the issue I have is with the memory allocation. Could you please review my memory table in the previous message and tell me if there is any thing wrong with it?

I believe i need: 4x1280x800 Bytes per buffer. Means I need 8MB of data in my 32 MB SDRAM device.

Thanks

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 29 Nov 2019 22:51:13 GMT

Hi Kerry! could you please get back to my question.

Thanks!

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Sat, 30 Nov 2019 00:22:30 GMT

I hope someone can volunteer to help me with the above issue. I am not using the QSPI flash now, as I am still having issues booting form the flash. Instead I am trying to boot from the SDRAM. I wanted to run evkmimxrt1060_elcdif_rgb example from the SDARM. I followed the instructions I have on this document.https://www.nxp.com/docs/en/application-note/AN12302.pdf so I can display something on a 1280x800 LCD. The issue is not hardware now. I am able to see the desired generated LCD clock. My issue now is about booting from SDRAM.

I used this document as a guide, but still no success: https://community.nxp.com/servlet/JiveServlet/download/10894-1-431150/RT1050_BriefOverview_v201.pdf

below are my settings:

Re: i.MX RT eLCDIF RGB Mode Use Case

kerryzhou — Tue, 03 Dec 2019 10:24:10 GMT

Hi Andre marcus,

So sorry for my later reply because of the weekends and yesterday's community log in problems.

I can't log in the community because of the website problems.

Yesterday and today, I double check the RT1060 LCD document in the RM and the application note you mentioned.

Now, we divide your problem in two sections:

1. Please don't connect the LCD, just import the SDK elcdif project, and configure it as the SDRAM code.

Can you enter the main code without the LCD?

You can find I can enter the main code, and the code location is 0x8000xxxx

It means the code in the SDRAM.

Please make this steps work at first.

You also can import the simple led_Blinky code, and run it in the SDRAM.

You need make sure your board CMSIS DAP with SDRAM works at first.

2. LCD code function

If you can enter the main code, just the LCD code function can't works, then you need to check your configuration.

You need to check your LCD datahsheet, and find this table:

This table related to the code configuration.

The application's 1280*800 datasheet may different as you.

The above yellow area code, you need to refer to your LCD datasheet to configure it.

Please double check it on your side.

I don't have your LCD on my side, so can't test it directly.

You also can share your LCD datasheet with me, I will help you to check it.

Please also check your hardware signal, whether it is correct.

Have a great day,
Kerry

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Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Tue, 03 Dec 2019 20:16:17 GMT

Hi Kerry!

My code is running, I solved my SDRAM issues. However, I am able to see any display yet. Here is the link the LCD I am using:

https://www.avnet-integrated.eu/fileadmin/user_upload/G101ICE-L01.pdf

quiet interesting I found that the LCD enable pin is pulled low. Please see image below:

The LCD _EN signal is in blue, while the yellow signal is the clock and it is set in the code to be at 70.5MHz. I first dont know what causing this signal to reset by itself.

Cheers!

Re: i.MX RT eLCDIF RGB Mode Use Case

kerryzhou — Wed, 04 Dec 2019 05:59:21 GMT

Hi Andre marcus,

Thanks for your updated information.

I already check your datasheet, I am interest in how you connect your LCD pins to the MIMXRT1060-EVK board?

1. Hardware connection

I find your datasheet LCD module pin is like this:

But the MIMXRT1060-EVK board LCD interface is like this:

Please tell me, how do you connect your LCD interface to the MIMXRT1060-EVKB?

BTW, the MIMXRT1060-EVK board BL-, BL+ is 15.7v, it meet the RK043FN02H-CT LCD demand:

But your LCD

15V already exceed your min backlight power supply voltage, how do you connect it?

2. About the LCD enable pin, if you check the RM, you will find pull low is correct

Wish it helps you!

Have a great day,
Kerry

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Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Wed, 04 Dec 2019 06:14:47 GMT

Hi Kerry!

Im using a custom board. Based on my lcd data sheet what should be Hsync and Vsync?

Cheers!

Re: i.MX RT eLCDIF RGB Mode Use Case

kerryzhou — Wed, 04 Dec 2019 06:32:57 GMT

Hi Andre marcus,

Please share your customer schematic, I need to check it.

Wish it helps you!

Have a great day,
Kerry

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Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 00:56:48 GMT

Hi Kerry!

I hope you can help me on this issue. Now my rgb code is running from the SDRAM. As I mentioned in my previous discussion, I modified evkmimxrt1060_elcdif_rgb so that it can run on a 1280x800 LCD. I sent you the data sheet in my previous posts. Now my issue is that I am seeing these signals: HSYNC, VSYNC, LCD_EN, and LCD_CLK (which I configured to be 70.5MHz). But I am not seeing any data on the data lines( R[0..7], G[0..7],B[0..7]). These signals are all pulled low when I check them with a scope. However, in a different test when I configured these data lines as GPIOs, I was able to toggle them. I don' t know if there is any register I need to access to enable data lines, if so please tell me. In the meantime, I attached below a copy of my code, please have a look and let me know if I am missing any configuration. I am just suspecting the SRDAM boot up to be the issue but I am not sure, as I am able to see the clocking signals. I also verified and I found that I am getting frame buffer fall at 60 Hz frequency.

Please help!

Attached project:

Re: i.MX RT eLCDIF RGB Mode Use Case

kerryzhou — Fri, 06 Dec 2019 08:18:26 GMT

Hi Andre marcus,

Could you please give me your RT schematic picture which used to connect your LCD pins?

I just need to check it, because I need to know which RGB signal you have connected, if your schematic is important, you don't need to send me the whole file, you just need to give me some picture about it, just like this:

Then I can help you more details.

Have a great day,
Kerry

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Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 08:19:44 GMT

More investigation of the problem leads me to suspect that my main issue is the graphics data that I stored in the Cachable SDRAM memory space. I have 8MB of data per frame and that cannot be stored in the 2MB of non-cachable SDRAM memory space. As I declared my frame buffer as a global variable, it just got initialized to zero and that's why I am seeing a black screen all the time.

If I need to prevent this frame buffer data from being cached what should I do? the example I was looking at was dealing with a 2MB of data which got stored as non-cachable and that was it.

I hope someone can comment as soon as possible.

Cheers!

Re: i.MX RT eLCDIF RGB Mode Use Case

kerryzhou — Fri, 06 Dec 2019 08:30:39 GMT

Hi Andre marcus,

You can disable the cache, then test it directly.

Comment :

SCB_EnableDCache();
SCB_EnableICache();

In BOARD_ConfigMPU();

Then you don't need to care about your non-cachable memory is not enough, just test it to check whether your problem is related to the cache.

BTW, please share me your hardware schematic, I really need to know how you connect LCD to the RT chip.

Have a great day,
Kerry

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Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 08:34:21 GMT

Hi Kerry!

My schematics is similar to what you have in development board. I dont have a copy now. I can send one tomorrow. BUt please have a look at my code. do you see any issue with the way I assigned my data to SDRAM? I am suspecting my frame buffer data just got cached. Please let me know if you see any issue. We are out of time, we need to validate our LCD as soon as possible.

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 08:44:34 GMT

Images deleted

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 08:44:59 GMT

These are my schematics screenshots

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 08:53:11 GMT

Do you see any issue in my code in the way the SDRAM is configured. Also I don't know if I need to align my data: do 64 bytes align?

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 08:53:52 GMT

Any issues with schematics?

Re: i.MX RT eLCDIF RGB Mode Use Case

farid_mabrouk — Fri, 06 Dec 2019 09:21:43 GMT

Any Updates?