NCS: flash_area_open(...) get a wrong address

[hu yang]

Hi all:

 I am using nrf52840 hardware. nrf connect sdk.

I am using file system and mcuboot at the same time. When i call  `flash_area_open(id, &pfa);`, i got a wrong device name.

I add `CONFIG_BOOTLOADER_MCUBOOT=y` to prj.conf, and i use sample is  'zephyr\samples\subsys\fs\littlefs\CMakeLists.txt' .

Here is `zephyr.dts':

5315.zephyr.dts

 

[hu yang]

Got that: after-enabling-mcuboot-in-ncs-external-flash-doesn-t-get-picked-up-by-littlefs  

I set  `CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=n` in my prj.conf. and set this in my .overlay:

/ {
	chosen {
		nordic,pm-ext-flash = &mx25l256;
	};
};

I got a wrong device address too.

[Håkon Alseth]

Hi,

 

The default location is that the storage partition is located in internal flash.

I suspect that you want the "littlefs_storage" section to be in your external flash?

 

To override this, you can statically define the partition(s):

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

 

You can define this in your pm_static.yml file.

littlefs_storage:
  address: <find the end-address of the "mcuboot_secondary" and place that here>
  device: mx25r6435f
  region: external_flash
  size: 0x6000  

 

Kind regards,

Håkon