[riot-notifications] [RIOT-OS/RIOT] board suggestion: nRF52840-dongle (#12189)
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Wed Sep 11 00:27:07 CEST 2019
I was just looking at this too.
It looks like we can use the pre-programmed USB bootloader with Nordic's `nrfutil` but the usage is a bit nonobvious mostly because it supports signing and the documentation isn't focused on command-line flashing. I found [this flashing guide](http://www.d0d0.pro/index.php/2018/09/23/programming-the-new-nordic-chip-nrf52840-and-usb-dongle-board-pca10059-featuring-it/) that makes quick work of it but I have yet to install python2 so I can try it out.
Also here's a [post](https://www.rototron.info/circuitpython-nrf52840-dongle-openocd-pi-tutorial/) on using openocd with it that includes some good information about things you might encounter when wiping the bootloader.
It's my understanding that one could easily backup the bootloader with openocd and restore it later but I haven't confirmed that.
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