How to remap bootloader and application flash area in overlay file

[sixuanlu&sky]

Board ：52840dk_52840

SDK： NCS1.7.1

IDE ：Visual Studio Code

I remap my bootloader partition in my application .overlay file

as

        &boot_partition{

            reg = <0x000000000 0x00010000>;

        };

        &slot0_partition {

            reg = <0x00010000 0x00063000>;

        };

but I get the this result in zephyr.dts, the beginning of slot0 did NOT change to 0x10000

                    boot_partition: partition@0 {
                        label = "mcuboot";
                        reg = < 0x0 0x10000 >;
                    };
                    slot0_partition: partition@c000 {
                        label = "image-0";
                        reg = < 0x10000 0x63000 >;
                    };

and my mcuboot build result is as following, the bootloader area size was still 48KB

Memory region         Used Size  Region Size  %age Used
           FLASH:       30984 B        48 KB     63.04%
            SRAM:       17760 B       256 KB      6.77%
        IDT_LIST:          0 GB         2 KB      0.00%

It seems like that my bootloader remap is a failure .

my quesion is

1# can I remap bootloader and application flash area in .overlay file

2# how to remap bootloader and application flash area in .overlay file

[Håkon Alseth]

Hi,

 

You should use the partition manager for this purpose and define a static partition:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html#static-configuration

Here's an example on expanding the specific section:

https://github.com/nrfconnect/sdk-nrf/blob/v1.8.0/applications/machine_learning/configuration/nrf5340dk_nrf5340_cpuapp/pm_static.yml#L5-L8

 

PS: a full partition layout is available after you configure you project in "build-folder/partitions.yml" - this file can be copied to pm_static.yml and modified per your needs.

  

Kind regards,

Håkon