1.1 KiB
1.1 KiB
Setup
Installing CircuitPython submodules
Before you can build, you will need to run the following commands once, which
will install the submodules that are part of the CircuitPython ecosystem, and
build the mpy-cross tool:
$ cd circuitpython
$ git submodule update --init
$ make -C mpy-cross
You then need to download the SD and Nordic SDK files via:
This script relies on
wget, which must be available from the command line.
$ cd ports/nrf
$ ./drivers/bluetooth/download_ble_stack.sh
Serial Bootloader
The Adafruit nRF52840 Feather uses a serial bootloader that allows you to update the core CircuitPython firmware and internal file system contents using only a serial connection.
On empty devices, the serial bootloader will need to be flashed once using a
HW debugger such as a Segger J-Link before the serial updater (nrfutil) can
be used.
Install the Bootloader with nrfjprog
make SD=s140 BOARD=feather52840 boot-flash
Building and Flashing CircuitPython
make SD=s140 SERIAL=/dev/ttyACM0 BOARD=feather52840 dfu-gen dfu-flash