DFU from SD130 v1.0.0 to SD130 v2.0.3 on nRF51822 with CLENR0 set

[Will Dimmit]

Good morning,

I've inherited a line of nRF51822-powered products that are currently running firmware based on SDK10 and SD130 v1.0.0.  UICR->BOOTLOADERADDR is set to 0x3b000, so there is room for the Secure Bootloader.  UICR->CLENR0 is set to 0x1c000 on these devices - which is appropriate for the old SD. 

I would like to update these to a new firmware based on SDK12.3 and SD130 v2.0.3 - but, as these are nRF51 series parts, I cannot reset CLENR0 to the proper value for this SD. 

I've been able to successfully update the bootloader and softdevice to SDK12.3/SD130 v2.0.3, but all app updates fail silently after transfer.

I've tested some changes to CODE_REGION_1_START in nrf_dfu_types.h, but have been unable to find a solution that works.

Thanks for any advice,

Will

[Will Dimmit]

To anyone else who runs across this; it can be done, but it requires:

• Relocating the application to 0x1c000 from the default 0x1b000
• Redefining MAIN_APPLICATION_START_ADDR to 0x1c000
• Redefining CODE_REGION_1_START to 0x1c000

With these changes, DFU works normally - you just lose those pages of flash between 0x1b000 and 0x1c000.

Cheers,

Will

[Hung Bui]

Hi Will, 

Thanks for sharing the solution. I was thinking the size of the S130 v2 should be bigger than S130 v1.x. But it's the opposite. Your solution looks good.