MCUBoot without Partition Manager

[BenKrug]

Hi, I want to implement DFU on an nRF52832 with a mx25r1635f external flash, originally I implement the partitions and everything using the devicetree since I find it a lot more comfortable to use. I followed this proccess: https://devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/software/posts/ncs-dfu , but the CONFIG_BOOTLOADER_MCUBOOT option enables the partition manager by default, is there a way to use it with the devicetree method for partitions? I saw that most applications on Zephyr do actually use the devicetree instead of the partition manager, so I expect it to be possible, but couldn't find a way to do it.

[BenKrug]

Another thing I'm finding weird is that the flash size is going down to 232kB even though the flash has 512kB, that is making my code overflow the flash in 47kB, but I can't reduce the code any more than I've already done. Is this a bug or is there a configuration I can change to fix that?

[Amanda Hsieh]

Hi, 

Could you provide the overlay and config files?

The 'PM_MCUBOOT_SECONDARY_ID' undeclared issue is usually caused by the setting inside the overlay. Make sure the overlay has the following section

/ {
	chosen {
		nordic,pm-ext-flash = &mx25r64;
	};
};

BenKrug said:

I'm finding weird is that the flash size is going down to 232kB even though the flash has 512kB, that is making my code overflow the flash in 47kB

Is it possible to provide the log for the overflow?

-Amanda H.

[BenKrug]

It finally compiled!! Now I'm going to test if the basic functions are still working with the partition manager instead of the devicetree. Thank you.

[Amanda Hsieh]

Good to hear that. Happy to help.

-Amanda H.

[BenKrug]

Now I'm having one more problem, the partition for littleFS is getting set as 0x6000, even though on the pm.yml file it's set as 0x7000, I tried to change the value but nothing changed that final result, always get 0x6000.