DFU with more storage flash

[Jason]

Using NCS 2.2.0, NRF52833

I want to use DFU for a customer trial but I also want to store as much customer sample data into the flash as I can. I don't need rollback on my DFU.

My first thought was to do the DFU without the rollback, and without creating the slot1_partition. But I'm not sure if this is even possible.

&flash0 {		// For DFU

	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x00000000 0xC000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0x0000C000 0x32000>;
		};
		slot1_partition: partition@3e000 {      //Get rid of this 
			label = "image-1";
			reg = <0x0003E000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x00070000 0xA000>;
		};
		storage_partition: partition@7a000 {    // Make this bigger
			label = "storage";
			reg = <0x0007A000 0x00006000>;
		};
	};
};

Otherwise, something similar to this would be ok. if its easier.

https://devzone.nordicsemi.com/f/nordic-q-a/66008/sharing-free-flash-memory-region-between-flash-data-storage-and-dfu 

Is this easy to do with NCS?

I can get the data from flash storage prior to doing DFU.

Thanks for your help!

-Jason

[Sigurd]

Hi,

If it's serial DFU, you can use a single slot. See e.g. these links:
DFU in nRF52820 using nRF connect SDK

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.2.0/nrf/ug_bootloader.html#mcuboot-partitions

[Jason]

The PCB is inside a sealed plastic case. I need to do this over the bluetooth connection, not serial. 

Are there any other options?

Thanks for your help

[Sigurd]

Hi,

No, for OTA DFU you need 2 slots(dual-bank).

PS: Partitioning is handled by Partition Manager: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html

PSS: If your app is taking up a lot of memory, then we have a guide on memory footprint optimization here: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/app_memory.html

[Jason]

Thanks for the doc links about partition manager, I'd not read that before. 

I'm going to try to nvs_mount the other slot (slot0_partition or slot1_partition), if I can guess which slot is currently "live". Then I can save data and remove it prior to doing a new DFU. 

Worth a try.