BST Default firmware

(Unofficial) Default BST firmware for Application Board 3.1 or 3.0 hardware.

The boards are shipped pre-programmed with the firmware.

If you would like to restore the firmware to its default state (possibly after some experimentation), here you can find the HEX files for programming.

Program the board

1. Go to the release page and download the *.hex files.

2. install the nrfjprog tool which is part of nRF-Command-Line-Tools. The nrfutil tool seems to have similar functionality, but reading and writing the memory addresses does not work.

3. Connect debugger to the SWD interface of the board and power ON the board

4. Program the firmware

4.1. For Application Board 3.1, run

nrfjprog -f nrf52 --program application_board_v3_rev1_fw.hex --sectorerase --verify

4.2. For Application Board 3.0, run:

nrfjprog -f nrf52 --program application_board_v3_rev0_fw.hex --sectorerase --verify

5. Write the bootloader address to the (UICR.BOOTLOADERADDR, 0x10001014 in the reference manual: UICR.NRFFW[0]):

nrfjprog -f nrf52 --memwr 0x10001014 --val 0x000F0000