topic Re: Boot from SDRAM issue in i.MX RT Crossover MCUs

Boot from SDRAM issue

shaileshnsec — Fri, 04 Jun 2021 07:38:09 GMT

Hi,

We are working on LCD of MIMXRT 1052 EVKB board and using SDK_2.9.1_EVKB-IMXRT1050. For this example project RGB uses SDRAM linker file MIMXRT1052xxxxx_sdram.icf.

We have created our own project on IAR where we are not using any startup file. We have created our own vector table and assign to SCB->VTOR register. When using MIMXRT1052xxxxx_ram.icf linker file, everything is working fine on LCD but the image size is not correct(this is not the problem) as memory is not sufficient . To correct image size need to use SDRAM linker file but when I put code in debug mode using this SDRAM linker file it goes to hardware fault or reset. Seems SDRAM is not initialized so system not able to boot.

Kindly let me knowhow to use SDRAM linker file and boot system.

Thanks/Shailesh

Re: Boot from SDRAM issue

jeremyzhou — Fri, 04 Jun 2021 08:47:09 GMT

hI,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
After selecting the sdram_debug option, I run the elcdif_rgb demo on the MIMXRT1050, actually, it can work well and I've not encountered the issue you mentioned.

BTW, I also use the SDK_2.9.1_EVKB-IMXRT1050
Have a great day,
TIC

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Re: Boot from SDRAM issue

shaileshnsec — Fri, 04 Jun 2021 09:55:47 GMT

Hi,

SDK is working fine. We have created our own eLcdif module by taking reference from SDK_2.9.1_EVKB-IMXRT1050 and we are not using any startup.s file. But in case our elcdif when using SDRAM MIMXRT1052xxxxx_sdram linker file, it is going to hardfault or reset. But with linker file MIMXRT1052xxxxx_ram.icf, It is hitting correctly to main(). Is there any settings requires ? or do we need to initialize SDRAM to boot from this ?

In case of SDK using SDRAM linker file

In case of our Lcdif using SDRAM linker file

Thanks/Shailesh

Re: Boot from SDRAM issue

jeremyzhou — Mon, 07 Jun 2021 03:07:11 GMT

Hi,
Thanks for your reply.
1) Is there any settings requires ? or do we need to initialize SDRAM to boot from this?
-- Please check the below debug setting.

From my experience, you'd better port your demo project to the elcdif_gdb demo project for testing.
Have a great day.
TIC

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Re: Boot from SDRAM issue

shaileshnsec — Mon, 07 Jun 2021 09:12:25 GMT

Thanks,

Now I am able to boot correctly.

Not related to boot, I am working on LCD, We are able to perform RGB. Do you have any example code to update text on LCD or Image loading in LCD ?

I can see in SDK_2.3.0_EVK-MIMXRT1050 example given sd_jpeg but seems discontinued in SDK_2.9.1_EVKB-IMXRT1050. Could you please provide for SDK_2.9.1_EVKB-IMXRT1050 version also ?

Thanks/ Shailesh

Re: Boot from SDRAM issue

jeremyzhou — Mon, 07 Jun 2021 09:52:28 GMT

Hi,
Thanks for your reply.
1) Do you have any example code to update text on LCD or Image loading in LCD ?
-- To provide the fastest possible support, I'd highly recommend you to refer to either emWin or LVGL demo in the SDK library.
2) I can see in SDK_2.3.0_EVK-MIMXRT1050 example given sd_jpeg but seems discontinued in SDK_2.9.1_EVKB-IMXRT1050. Could you please provide for SDK_2.9.1_EVKB-IMXRT1050 version also?
-- Please import the sd_jpeg demo as the below figure shows.

Have a great day,
TIC

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Re: Boot from SDRAM issue

shaileshnsec — Mon, 07 Jun 2021 10:20:42 GMT

Hi,

I have seen this on MCUXpressoIDE_11.3.1_5262. Is it possible to provide IAR code, I am not using MCUXpressoIDE_11.3.1_5262 IDE.

Thanks/Shailesh

Re: Boot from SDRAM issue

shaileshnsec — Mon, 07 Jun 2021 10:38:37 GMT

Hi, thanks,

I have downloaded IAR project for sd_jpeg.

Thanks/shailesh

Re: Boot from SDRAM issue

shaileshnsec — Mon, 07 Jun 2021 11:21:23 GMT

HI,

After running emwin_temperature_control,

I am getting below issue,

any way to recover this