Changed MBR parameter handling in SDK15.3.0

[Adrian Eggenberger]

Hi

I was playing around with the new SDK 15.3.0 and most things worked as expected. One thing that causes some trouble is the changed MBR parameter page handling. It seems that new the MBR parameter page is given by the value at address 0xFFE (last word in MBR code???). Can you give an update on this change in MBR parameter page? What is the correct migration path if we wan't to update to the new SDK?

Regards Adrian

[Jared]

Hi,

This is specified in the Softdevice specification here.

Best regards

Jared 

[Adrian Eggenberger]

Hi

Thanks for the link to the definition how the MBR handles the parameter page.

I guess what confuses me is the following line in the SDK 15.3:

#define NRF_UICR_BOOTLOADER_START_ADDRESS       (MBR_BOOTLOADER_ADDR)

With this define the UICR address is on address 0xFFC in the MBR? In the last SDK version this was an address in the UICR.

Regards Adrian

[Jared]

Hi,

Yes, that is correct, it's now in the MBR. It was done because the UICR can't be protected from write. It should be backwards compatible as long as the value on adress 0xFFC is 0xFFFFFFFF.

Best regards

Jared