LPC54018 persistent variable storage in single SPI Flash across power cycles

mitchkapa — Wed, 08 Feb 2023 22:22:22 GMT

Hi,

I'm using an LPC54S018 microcontroller with a single 16 MB SPIFI flash. The application code is too large to fit into RAM and so I am using the XIP_IMAGE flag during compile. I need to store variables in the flash for access across power cycles. I have been following the steps listed in this forum post:

https://community.nxp.com/t5/Kinetis-Microcontrollers/STORING-VARIABLES-IN-FLASH/m-p/650092

but I can't modify the "test" variable once the code is running, because it is read-only. Is there a way to make the test variable read/write, and able to be saved across power cycles?

Thanks for your help,

Mitch

Re: LPC54018 persistent variable storage in single SPI Flash across power cycles

ZhangJennie — Wed, 01 Mar 2023 09:22:35 GMT

We need to use spifi flash command to erase and write spifi flash.

I suggest you check SDK spifi polling demo code:

Have a nice day,

Jun Zhang

LPC MicrocontrollersのトピックLPC54018 persistent variable storage in single SPI Flash across power cycles

LPC54018 persistent variable storage in single SPI Flash across power cycles

Re: LPC54018 persistent variable storage in single SPI Flash across power cycles