flash address change when add CONFIG_BOOTLOADER_MCUBOOT=y

[ChiragBhavsar]

Hi,

I referred to the zephyr/samples/drivers/soc_flash_nrf/ code, and when I added CONFIG_BOOTLOADER_MCUBOOT=y, the flash storage started from address 0xfc000. Why did this address change?

storage_partition: partition@f8000 {

label = "storage";

reg = <0x000f8000 0x00008000>;

};

Also, am I able to change the storage_partition flash address? If yes, how can I change it?

Every time I try to change the storage_partition address, it still starts at 0xfc000.

[Turbo J]

When  CONFIG_BOOTLOADER_MCUBOOT is selected, it  will auto enable partition manager - and ignore DTS partitions altogether.

[ChiragBhavsar]

Hi,

Thanks for the support,

For BLE FOTA, we need to enable CONFIG_BOOTLOADER_MCUBOOT=y. If we want to write data to flash, how do we select the address for writing the data? Is it possible to see auto enable partition manager?

if possible can you give reference code for this.

[Einar Thorsrud]

The latest part herr in your file sets the size and location of the settins partition:

settings_storage:
address: 0xfd000
size: 0x1000

You can change the address and size (this is just one page, you probaly want more). You also do not need to define everything in pm_static. It is OK to define what you want at specific locations, and then let the partition manager automatically place the rest (though en the end you probably want to fix it as you want static partitions when using DFU).

If you want to look at examples, you can look at some of the pm_static files in the SDK. One example is this one.

[ChiragBhavsar]

I added the following address and size to the pm_static.yml file, but the code still uses the partition information from the partitions.yml file. I’m not sure why the partition from the pm_static.yml file isn’t being used.

 settings_storage:
address: 0xfe000
size: 0x1000

[Einar Thorsrud]

Did you do a pristine build (or just delete the build folder and build again)?

[ChiragBhavsar]

yes i do this but i got below error

Failed to partition region flash_primary, size of region: 1048576
Partition Configuration:
mcuboot:
placement:
before:
- mcuboot_primary
size: 49152
mcuboot_pad:
placement:
align:
start: 16384
before:
- mcuboot_primary_app
size: 512
settings_storage:
size: 8192

[Einar Thorsrud]

I see. Please see this thread.