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]

Hi,

There will be a partition for persistent storage in flash as well (such as settings which you can use for other things, and which is also used by the BT stack for bondign information). You can go to the build directory and type "ninja partition_manager_report" to see a representation of the parition layout tenerated by the partition manager (it is also possible in the nRF Connec for VS Code GUI if you select the build folder under application sand us eMemory report, but it does not currently show the partitions with SDK 2.7.0). See the Parition manager documentation for more details.

[ChiragBhavsar]

Hi,

In the build/zephyr/include/generated/pm_config.h file, I made the following changes, and I was able to write data to address 0xfd000.

#define PM_SETTINGS_STORAGE_OFFSET    0xfd000                         // 0xfc000  

#define PM_SETTINGS_STORAGE_ADDRESS   0xfd000                       //0xfc000

#define PM_SETTINGS_STORAGE_SIZE              0x1000                    //0x2000

[Einar Thorsrud]

Note that this is a generated file so changes here will be lost if you make a new build. If you want to cange the partition layout you should do so in a pm_static.yml file (see Configuring static partitions).

[ChiragBhavsar]

Hi,

I am unable to see pm_static.yml file in my work space,i want to generate this file?if yes then can you please suggest me how i can i generate this file.

[Einar Thorsrud]

Often you will pick the auto generated pm_static.yml from the build folder and modify slightly if needed. you can also make a full or partial pm_static.yml that only change what you need. You can see many pm_static.yml fiels in the SDK that you can refer to. There is also description on how this works in the documetnation I linked to in my previous post.

[ChiragBhavsar]

Hi,

I took the pm_static.yml file, added the address and size, and placed the file into the build directory.

Do I need to make any changes in the pm_config.h file? I'm not able to see the partition name in the pm_config.h file.