Is it possible to modify BLE DFU bootloader size

RE: Is it possible to modify BLE DFU bootloader size

Vidar Berg — Thu, 31 May 2018 12:40:06 GMT

You can change the flash start address and size in linker script (secure_dfu_ble_gcc_nrf52.ld).

E.g.,

FLASH (rx) : ORIGIN = 0x78000, LENGTH = 0x6000 -> FLASH (rx) : ORIGIN = 0x79000, LENGTH = 0x5000 // Note: start address must be page aligned

Keep in mind that it is not possible to change the start address through DFU, so Ideally there should be some headroom in case you need to upgrade to a larger bootloader in the future.

RE: Is it possible to modify BLE DFU bootloader size

Boris — Thu, 31 May 2018 08:20:31 GMT

We are developing projects with two chips and with two SDK versions:

The first chip:

NRF51822 with SDK 12.0

and the second chip:

NRF52832 with SDK 14.0

GNU Tools ARM Embedded version 5.4.

NRFutil version 3.5

RE: Is it possible to modify BLE DFU bootloader size

Vidar Berg — Wed, 30 May 2018 11:48:23 GMT

Hi Boris,

It is possible to change the bootloader start address if there is enough free space in the bootloader section. The start address is defined by the linker. Which SDK version, IC, and toolchain are you using?