topic Re: RT1021: Writing to flash when running XIP from the same flash. in i.MX Processors

RT1021: Writing to flash when running XIP from the same flash.

rshipman — Tue, 25 Jan 2022 15:15:48 GMT

Hi,

Is there a way to write/program the same flash that you are running XIP from?

Kind regards,

Ronnie

Re: RT1021: Writing to flash when running XIP from the same flash.

jeremyzhou — Wed, 26 Jan 2022 02:34:53 GMT

Hi,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) Is there a way to write/program the same flash that you are running XIP from?
-- Yes, it's possible on the condition that relocating the FlexSPI driver in the RAM and you can refer to the flexspi_nor_polling_transfer demo in the SDK library to do it.
Have a great day,
TIC

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Re: RT1021: Writing to flash when running XIP from the same flash.

Selrac_13 — Tue, 01 Aug 2023 22:28:31 GMT

Hi @jeremyzhou,

I am very interested on this topic.

When you say:

on the condition that relocating the FlexSPI driver in the RAM

How that can be achieved with details? I have taken a look to the example you mention: flexspi_nor_polling_transfer and I see

FlexSPI driver is moved to RAM on the Linker (linkscripts folder)
Use another Flash driver that the most common one:

But I don't see any Flash partitions or anything like that.

My current project is using this other flash driver:

Having the MIMXRT1020-EVK_IS25LP064.cfx is a requirement?

With more details what I want to achieve is to use the 8 MB SPI Flash for different purposes:

3 MB for the program itself
Other 5 MB as a Flash storage to use in RAW to read/write data

Which steps I need to follow?

Many thanks,

Carles