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boards/feather-nrf52840-sense: Add bootloader info #20034

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Nov 1, 2023
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boards/feather-nrf52840-sense: Add bootloader info #20034

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21 changes: 21 additions & 0 deletions boards/feather-nrf52840-sense/doc.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -23,4 +23,25 @@ Low Energy and IEEE 802.15.4 support via the nRF52840 MCU.
Refer to [The Feather nRF52840 Express
documentation](https://doc.riot-os.org/group__boards__feather-nrf52840.html) for further details.
Both use the same flasher, bootloader, and terminal settings.

On "fresh" boards the
[bootloader may need to be updated](https://learn.adafruit.com/adafruit-feather-sense/update-bootloader)

#### Updating Old Bootloaders

In some cases the bootloader may be too old to even mount on startup.
Double tap the reset button to get into bootloader mode and check the
`INFO_UF2.TXT` for bootloader information.
If the version is less than `0.4.0` then one can use the
[Adafruit_nRF52_Bootloader](https://github.com/adafruit/Adafruit_nRF52_Bootloader)
tool to update.

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For example, one can run the following if `arm-none-eabi-gcc` and
`adafruit-nrfutil` are installed:
```
git clone https://github.com/adafruit/Adafruit_nRF52_Bootloader.git
cd Adafruit_nRF52_Bootloader
git submodule update --init
make BOARD=feather_nrf52840_sense SERIAL=/dev/ttyACM0 flash-dfu
```
*/