1*421ee5a8SDirk Helbig# nRF5340 (Audio) DK Board as USB HCI Dongle Guide 2*421ee5a8SDirk Helbig 3*421ee5a8SDirk HelbigThis will turn the Nordic nRF5340 DK and Audio DK boards into an USB CDC HCI dongle. 4*421ee5a8SDirk Helbig 5*421ee5a8SDirk HelbigIf using the NRF Connect SDK ( sdk-nrf ) it is important to follow the order in this document, as 'west flash' 6*421ee5a8SDirk Helbigwill also program the NetCore with zephyr-ll which needs to be replaced afterwards with the Packetcraft Link Layer. 7*421ee5a8SDirk Helbig 8*421ee5a8SDirk Helbig## Preconditions 9*421ee5a8SDirk HelbigCopy the included files to '${ZEPHYR_ROOT}/zephyr/examples/bluetooth/hci_uart/' 10*421ee5a8SDirk Helbig 11*421ee5a8SDirk Helbig## Build/Flash HCI Bridge on AppCore 12*421ee5a8SDirk Helbig 13*421ee5a8SDirk HelbigYou need to specify the board with the '-b' param in the west call. 14*421ee5a8SDirk Helbig 15*421ee5a8SDirk HelbigFor nRF5340 DK: 16*421ee5a8SDirk Helbig 17*421ee5a8SDirk Helbig```sh 18*421ee5a8SDirk Helbigcd ${ZEPHYR_ROOT}/zephyr/samples/bluetooth/hci_uart/ 19*421ee5a8SDirk Helbigwest build --pristine -b nrf5340dk_nrf5340_cpuapp -- -DDTC_OVERLAY_FILE=usb.overlay -DOVERLAY_CONFIG=overlay-usb.conf 20*421ee5a8SDirk Helbigwest flash 21*421ee5a8SDirk Helbig``` 22*421ee5a8SDirk Helbig 23*421ee5a8SDirk HelbigFor nRF5340 Audio DK (ADK) 24*421ee5a8SDirk Helbig 25*421ee5a8SDirk Helbig```sh 26*421ee5a8SDirk Helbigcd ${ZEPHYR_ROOT}/zephyr/samples/bluetooth/hci_uart/ 27*421ee5a8SDirk Helbigwest build --pristine -b nrf5340_audio_dk_nrf5340_cpuapp -- -DDTC_OVERLAY_FILE=usb.overlay -DOVERLAY_CONFIG=overlay-usb.conf 28*421ee5a8SDirk Helbigwest flash 29*421ee5a8SDirk Helbig``` 30*421ee5a8SDirk Helbig 31*421ee5a8SDirk Helbig## Flash Packetcraft Link Layer on NetCore 32*421ee5a8SDirk Helbig 33*421ee5a8SDirk Helbig```sh 34*421ee5a8SDirk Helbignrfjprog --program ble5-ctr-rpmsg_3424.hex --chiperase --coprocessor CP_NETWORK -r --verify 35*421ee5a8SDirk Helbig``` 36*421ee5a8SDirk Helbig 37*421ee5a8SDirk Helbigthe corresponding hex file is in the [nrfConnectSDK](https://github.com/nrfconnect/sdk-nrf/blob/main/lib/bin/bt_ll_acs_nrf53/bin) 38*421ee5a8SDirk Helbig 39*421ee5a8SDirk Helbig## Usage / Find Serial Port 40*421ee5a8SDirk Helbig 41*421ee5a8SDirk HelbigOn macOS, the nRF5340 with the HCI bridge show up as 5 /dev/tty. To find the HCI one, list all /dev/tty.* devices, 42*421ee5a8SDirk Helbigthen press and hold the RESET button and list all devices again. The missing one is the one provided by the HCI bridge. 43*421ee5a8SDirk Helbig 44*421ee5a8SDirk Helbig## HCI log 45*421ee5a8SDirk Helbig 46*421ee5a8SDirk Helbig```sh 47*421ee5a8SDirk Helbigbtmon -J nrf5340_xxaa_app -w <logfile> 48*421ee5a8SDirk Helbig``` 49