[riot-notifications] [RIOT-OS/RIOT] boards: add support for nrf52840-dongle (#13146)

chrysn notifications at github.com
Fri May 8 13:59:11 CEST 2020

@chrysn commented on this pull request.

> @@ -0,0 +1,27 @@
+# This board uses the vendor's serial bootloader
+PROGRAMMER ?= nrfutil
+ifeq (nrfutil,$(PROGRAMMER))
+  # Using nrfutil implies using the Nordic bootloader described at
+  # <https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/nrf52840-dongle-programming-tutorial>.
+  #
+  # It has a static MBR at the first 4k, and an ample 128k Open USB Bootloader at
+  # the end, leaving 892k for the application. This overwrites any SoftDevice,
+  # but that's what the minimal working example for the dongle does as well.
+  ROM_OFFSET = 0x1000
+  FW_ROM_LEN = 0xdf000

I just tried, flashing succeeded but the board won't come up. Going for the the blacklisting solution, this should make it passable. (The game of whether this declares its memory wrong or whether the suit/riotboot can't work on exotic-memory-layout bootloaders can be had outside this issue.)

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