Hello,
I'm trying to burn a bootloader to 2 boards: a Seeed XIAO with an nRF52840, and a custom board with the same chip. Are there any step by step tutorials on accomplishing this?
as far as needed hardware and software is concerned, are an nRF52840 DK, and a PC with the nRF Connect SDK sufficient?
Hello,
Once you have connected the debug wires, the steps for programming an external board using the nRF52840 DK are the same as those for programming the on-board nRF chip on the DK.
Other things to keep in mind:
- The nRF52840 DK includes the optional 32kHz crystal and DC/DC inductors. If these components are not mounted on the target board, the firmware must be configured to select the internal RC oscillator as the low-frequency clock source and not enable the DC/DC regulator (CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y && CONFIG_BOARD_ENABLE_DCDC=n).
- Ensure you have a common ground, and that the I/O voltage on your DK matches the I/O voltage on your target board. The debugger does not have a built-in level shifter.
Best regards,
Vidar
