Code & dts changes in mcuboot for mapping external flash as SLOT-1

RE: Code & dts changes in mcuboot for mapping external flash as SLOT-1

Hung Bui — Mon, 21 Mar 2022 15:22:58 GMT

Hi Mohammed,
I don't think it would be a big issue, as long as the library for the SPI flash supports the 2 requirements in the documentation.

RE: Code & dts changes in mcuboot for mapping external flash as SLOT-1

Ubaid_M — Mon, 21 Mar 2022 13:06:24 GMT

Hello Hung Bui,

Thanks for the project, will go through.

I see that it says : "The QSPI NOR flash memory driver supports these features"
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_bootloader_external_flash.html#:~:text=The%20QSPI%20NOR%20flash%20memory%20driver%20supports%20these%20features

But my requirement is SPI NOR flash.
I hope no challenges there.

Thanks,

RE: Code & dts changes in mcuboot for mapping external flash as SLOT-1

Hung Bui — Mon, 21 Mar 2022 12:50:13 GMT

Hi Mohammed,

You would need to define the external flash memory in an overlay file. Have a look at the documentation here.

If you have a nRF52840 DK you can test the following example that I made here. In the example it support DFU update via UART to the external QSPI flash on the nRF52840 DK and then MCUBoot will swap the image on the external flash with the application when you do the "confirm" command.