How to change the start address of the bootloader

[jixing.zou]

Hi:

I want to  add some code to the nRF51822 bootloader.But lack of code space. Whether I can modify the start address of the bootloader??

[John]

At a minimum you will need to change:

1. The IROM1 start and size setting is in the project options window, target tab.
2. The #define BOOTLOADER_REGION_START in dfu_types.h

There may be others, but these are the ones that I am aware of.

[jixing.zou]

Hi I found #define NRF_UICR_BOOT_START_ADDRESS (NRF_UICR_BASE + 0X14), this is the bootloader start address stored in UICR_FWID register. So I want to change it. I found SoftDevice always set it to 0x0003c800. Even if you changed it, softdevice will reset it to 0x0003c800.