nrf52810 not enough flash

[hsc]

I am using nrf52810, using sdk15.2, softdevice6.1.0, my application flash takes up 56KB (I used fds), softdevice: 100KB and bootloader: 24KB, resulting in insufficient flash. I want to modify the BootLoader to reduce the BootLoader's flash occupancy, how can I change the BootLoader to be an non-secure BootLoader

[Einar Thorsrud]

Hi,

I am not sure how much flash you will save by removing the signature verification code, but it will definitely be some. You can start by making signature_required() in components\libraries\bootloader\dfu\nrf_dfu_validation.c always return false, and remove all signature verification related and nrf_crypto related code.

[hsc]

Do Android and IOS apps need to be modified?

Do you need to modify the way to generate the firmware upgrade package

[Einar Thorsrud]

Hi,

hsc said:

Do Android and IOS apps need to be modified?

I have not tested this, but I would assume that the nRF Connect Android app would handle a non-signed image, as it is all "encapsulated" in the init packet.

hsc said:

Do you need to modify the way to generate the firmware upgrade package

No, just use the same nrfutil command as you would normally do, but omit to specify a private key with  --key-file. When that option is missing the package is generated as normal, but not signed.

[hsc]

thank you very much，I'll try