Bootloader fix for Makerdiary nRF52840 MDK USB dongle
| asmw
- Break the bootloader on an Makerdiary nRF52840 MDK USB Dongle
- You can do this by flashing an OpenSK build which was built around the first week in february 2021
- Have a SWD capable JTAG interface
- Have openocd installed
-
apt install openocd
for Ubuntu
-
- Grab a fresh bootloader
- I used
uf2_bootloader-0.2.13-44-gb2b4284-nosd.hex
- I used
- Wire up the dongle based on the pin description
- Note that I set the Busblaster to provide 3.3V
- Create a
openocd
script, e.g. flash-bootloader.cfg (You will have to adapt this to your JTAG interface) - Run
openocd
:openocd -f flash-bootloader.cfg
- You might have to press the
reset
button on the USB dongle to get a connection
- You might have to press the