use NrfConnect SDK with 52840 dongle USB CDC Shell/console

Question

I would like to use the USB dongle with the Openthread CLI example (and eventually an open thread app) as the SDK is just too big and overpowered for my prototypes, I would like to use the USB CDC as the Shell to communicate with the CLI and zephyr. 
 https://github.com/zephyrproject-rtos/zephyr/issues/16761 
 I also looked at the Thingy applications/connectivity bridge which is similar 
 I can program using nrfconnect or nrfutil, but I never see the USB CDC serial port come up after programming. 
 I'm using nrfconnect sdk 1.4.0 os OS X 
 
 I have added to boards 
 nrf52840dongle_nrf52840.overlay 
 /* Copyright (c) 2020 Nordic Semiconductor ASA * * SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic */ 
 &uart0 { status = "okay"; }; 
 / { /* * In some default configurations within the nRF Connect SDK, * e.g. on nRF52840, the chosen zephyr,entropy node is &cryptocell. * This devicetree overlay ensures that default is overridden wherever it * is set, as this application uses the RNG node for entropy exclusively. */ chosen { zephyr,entropy = &rng; }; }; 
 
 Also added a config overlay, I tried with and without some UART interrupt setting mentioned in other posts. 
 # # Copyright (c) 2020 Nordic Semiconductor # # SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic # 
 # Enable Thread 1.2 features CONFIG_OPENTHREAD_THREAD_VERSION_1_2=y CONFIG_OPENTHREAD_DUA=y CONFIG_OPENTHREAD_MLR=y CONFIG_OPENTHREAD_BACKBONE_ROUTER=y 
 CONFIG_GPIO=y CONFIG_SENSOR=y #CONFIG_BME280=y #CONFIG_MCP9600=y #CONFIG_ACS71020=y 
 # USB CONFIG_USB=y CONFIG_USB_DEVICE_STACK=y CONFIG_USB_DEVICE_MANUFACTURER="Nordic Semiconductor" CONFIG_USB_DEVICE_VID=0x1915 CONFIG_USB_DEVICE_PID=0x9100 CONFIG_USB_DEVICE_PRODUCT="Zephyr UART" CONFIG_USB_CDC_ACM=y 
 CONFIG_UART_SHELL_ON_DEV_NAME="CDC_ACM_0" 
 I also added the dongle to Allow to sample.yaml 
 sample: 
 description: Test OpenThread Command Line Interface. 
 name: OpenThread CLI sample 
 tests: 
 samples.openthread.cli: 
 build_only: true 
 build_on_all: true 
 tags: openthread cli 
 platform_allow: nrf52840dk_nrf52840 nrf52833dk_nrf52833 nrf52840dongle_nrf52840

Axel Schlueter · Accepted Answer

I was literally trying the same thing today! In addition to the changes to the config that you already added you also need to enable the USB subsystem in samples/openthread/cli/src/main.c by adding a call to usb_enable. With that change I got the OpenThread CLI working on the PCA10059:

diff --git a/samples/openthread/cli/src/main.c b/samples/openthread/cli/src/main.c
index 40178f72..8f70d190 100644
--- a/samples/openthread/cli/src/main.c
+++ b/samples/openthread/cli/src/main.c
@@ -6,6 +6,7 @@

 #include <zephyr.h>
 #include <logging/log.h>
+#include <usb/usb_device.h>

 #if CONFIG_BT
 #include "ble.h"
@@ -27,6 +28,8 @@ void main(void)
 {
 LOG_INF(WELLCOME_TEXT);

+ usb_enable(NULL);
+
 #if CONFIG_BT
 ble_enable();
 #endif

use NrfConnect SDK with 52840 dongle USB CDC Shell/console

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