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image-nrf_usb_dongle.png
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  • nRF52840

  • ARM M4 64 MHz

  • ROM 1024 KB, RAM 256 KB

  • Bluetooth 5, Mesh

  • 802.15.4, Thread, Zigbee

  • USB 2

Applications

nRF52840 Dongle

Pinout

Serial Wire Debug

  • the usb dongle is referred to as PCA10059 which in projects usually shifts the app to offset 0x1000 as openbootloader usage is expected

  • With serial wire debug, it's possible to flash applications at same address as the PCA10056 which is at address 0x0000

Serial Wier Debug

LEDS

  • LED1 Green : P0.06

  • LED2 Green : P0.08

  • LED2 Green : P1.09

  • LED2 Blue : P0.12

pogo pin adapter

  • Pogo Pin P75-E2 Dia 1.3mm Length 16.5mm

Pgogo Adapter
STL models zip

micro python

build micro python

bootloader

options

recovery

  • on nRF SDK recovering the openbootloader mode would then require to reflash the MBR with any project make flash_mbr

  • without nRF SDK, download the bootloader from the nordic tutorial and rename to pca10059_bootloader.hex

then run

J-Link>Power on
cd pca10059_bootloader
>nrfjprog -f nrf52 --eraseall
 >nrfjprog -f nrf52 --chiperase --program pca10059_bootloader.hex --verify --reset

build for USB DFU

on any sample from nRF Connect that supports the nrf52840dongle_nrf52840 run

cd nrf\v2.3.0\nrf\samples\xxx\
>west build -p always -b nrf52840dongle_nrf52840 -- -DOVERLAY_CONFIG="overlay-usb.conf" -DDTC_OVERLAY_FILE="usb.overlay"

USB DFU command line

It is possible to use the nRF Connect programmer, but to perform the same with command line, you need to generate a package the flash it as follows

>nrfutil pkg generate --hw-version 52 --sd-req=0x00 --application build/zephyr/zephyr.hex --application-version 1 build/zephyr/zephyr.zip
nrfutil dfu usb-serial -pkg build/zephyr/zephyr.zip -p COM8