i.MX RT Crossover MCUs中的主题 Re: HyperRAM boot

HyperRAM boot

rans — Wed, 12 Sep 2018 05:48:36 GMT

Hello,

Is there an example showing how to boot an application with HyperRAM ? (I've searched in imxRT 1050 documentation but didn't find any reference).

Or is it actually the same as running from HyperFlash (FlexSPI interface in 0x60000000) without any special configuration in memory controller ?

Thank you,

ranran

Re: HyperRAM example

igorpadykov — Wed, 12 Sep 2018 06:07:36 GMT

Hi ranran

please look at AN12239 How to Enable HyperRAM with i.MX RT

https://www.nxp.com/docs/en/nxp/application-notes/AN12239.pdf

Best regards
igor
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Re: HyperRAM example

rans — Wed, 12 Sep 2018 06:40:45 GMT

Hi Igor,

Thank you very much.

According to this AN is seems that the code is running from ram or sdram and then access hyperRAM.

But we need to boot from hyperRAM . Is it possible to boot from flash into hyperRAM? How ?

Another thing is that I can't find the source code package which is referenced in this AN. Where can it be downloaded from ?

Thank you,

ranran

Re: HyperRAM example

igorpadykov — Wed, 12 Sep 2018 08:22:45 GMT

i.MXRT1050 Reference Manual sect.8.6.1 Serial NOR Flash Boot via FlexSPI

lists only HyperFlash as boot option, seems boot from hyperRAM is not supported.

i.MX RT1050 SDK can be obtained from

Welcome | MCUXpresso SDK Builder

Best regards
igor

Re: HyperRAM example

rans — Wed, 12 Sep 2018 15:59:46 GMT

Hi Igor,

Thank you for the help.

Just to make the question direct as possible:

We plan use the following chip:

http://www.cypress.com/file/322936/download

It is memory chip combined of both hyperRAM and hyperFLASH in one unit.
It uses CS to select between the hyperRAM and hyperFLASH

We wanted to use it similarly as done here, but instead of serial NOR we use hyperFLASH and instead of SDRAM: to use hyperRAM.

RT1050 - Booting from serial NOR flash to SDRAM

We are not sure yet about the correctness of using this merged RAM&FLASH chip for the boot, especially the issue of CS which might be problematic for the boot using MCU (MCU bootrom shall need to copy from flash to RAM ).

Can you please say if you think it is possible to use this device for bootring from hyperFlash to hyperRAM ?

Thank you,

ranran

Re: HyperRAM boot

igorpadykov — Thu, 13 Sep 2018 00:54:53 GMT

Hi ranran

I think one can use hyperRAM instead of serial NOR hyperFLASH for your case.

Best regards
igor

Re: HyperRAM boot

rans — Thu, 13 Sep 2018 06:26:54 GMT

Hi Igor,

Thank you.

I understand. That's seems reasonable because both hyperRAM and hyperRAM reside in the same memory space (flexSPI, 0x60000000).

Yet, hyperRAM is voltile memory, which means that it can't be used to store the application between reboot.

We use a combined chip:

http://www.cypress.com/file/322936/download

The question is if it is possible to boot from hyperFlash and then rellocate the application from hyperflash to hyperram and continue running the application ?

Best Regards,

Ranan

Re: HyperRAM boot

igorpadykov — Thu, 13 Sep 2018 06:57:58 GMT

Hi ranran

I think yes this is possible.

Best regards
igor

Re: HyperRAM boot

rans — Thu, 13 Sep 2018 15:27:10 GMT

Hello Igor,

I can't find the source code which need to be attached to this AN.

Where can I find it ?

Thank you so much,

ranran

Re: HyperRAM boot

igorpadykov — Fri, 21 Sep 2018 10:52:26 GMT

https://www.nxp.com/docs/en/nxp/application-notes-software/AN12239SW.zip

Best regards
igor

Re: HyperRAM boot

nileshbadodekar — Sat, 02 Feb 2019 00:13:34 GMT

Hi Ranan,

were you able to achieve this? I am kind of trying to do the same!

Thanks

Nilesh

Re: HyperRAM boot

rans — Wed, 06 Feb 2019 14:26:21 GMT

Hi Niles,

I haven't got the opportunity to try that.

Our system engineer decided to move to another architecture and different memories.

Thanks,