Use of the USB CDC ACM interface together with the BT Mesh Stack on the nRF52840 dongle

[uli_hn]

Dear Nordic developer community,

I am in the process of developing a communication with the PC via the USB CDC ACM interface of the nRF52840 chip. The information received from the PC will first be evaluated via this serial interface and then distributed via the BT Mesh. That is the plan. This plan is to be realized with the nRF52840 dongle, which will first be implemented and tested on the nRF52840 DK. The procedure for this is already available, has also been implemented and is running on the nRF52840 DK.

The main procedure initialise

1. a few status LEDs
2. and then the initialization of the serial interface,
3. at the end Bluetooth is switched on and the mesh is initialized.

/** @file  main.c
 *  @brief This is a special BT Mesh Node that acts as the bridge between a computer and the BT Mesh.
 * 
 * As platform should be used Nordic's nRF52840 Dongle. The platform has its own USB Device as well as a BT Stack.
 */

// BT Mesh
#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/drivers/gpio.h>				// for handling the GPIO Set - e.g. PS_HOLD pin for set system on or off
#include <bluetooth/mesh/models.h>
#include <bluetooth/mesh/dk_prov.h>
#include "model_handler.h"						// for BT mesh functions and the own vendor bt mesh
// Peripheral equipment
#include "serial.h"								// includes zephyr's => kernel.h | device.h | drivers/uart.h
#include "rgb_io.h"								// RGB Interface => to handle app states as an UI
#include <zephyr/sys/printk.h>					// for Logging with printk
// Logging
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(main, 3);

// Set pin for the hardware switch (only to measure the output in dongle & DK environment)
#define ZEPHYR_USER_NODE DT_PATH(zephyr_user)	// have a path to the attribute section inside the device tree
const struct gpio_dt_spec ps_hold_pin = GPIO_DT_SPEC_GET(ZEPHYR_USER_NODE, ps_hold_pin_gpios); // handles the GPIO container for the PS_HOLD pin, which should be set in the very beginning

static void bt_ready(int err) {

	if (err) { 	LOG_ERR("Bluetooth init failed (err %d)", err); return; }

	err = bt_mesh_init(bt_mesh_dk_prov_init(), model_handler_init()); 		// inside the model_handler_init() several clients will be created
	
	if (err) { 	LOG_ERR("Initializing mesh failed (err %d)", err); return; }

	if (IS_ENABLED(CONFIG_BT_MESH_LOW_POWER)) {
		bt_mesh_lpn_set(true);
	}

	if (IS_ENABLED(CONFIG_SETTINGS)) {
		settings_load();
	}

	/* This will be a no-op if settings_load() loaded provisioning info */
	bt_mesh_prov_enable(BT_MESH_PROV_ADV | BT_MESH_PROV_GATT);

	LOG_INF("Mesh initialized");
}

int main(void) {

	k_sleep(K_MSEC(200)); 	// wake up time 200 ms

	// Sets first serial message with platform & zephyr version
	printk("%s (Zephyr OS Build %s) is initializing...\n\n", CONFIG_USB_DEVICE_PRODUCT, STRINGIFY(BUILD_VERSION)); // set up the present platform with zephyr build version

	// Set power switch pin to active high
	if (!gpio_is_ready_dt(&ps_hold_pin)) { LOG_ERR("GPIO spec is not ready for use. PS_HOLD pin cannot be set."); return 0; } // the pin is defined in the top
	gpio_pin_configure_dt(&ps_hold_pin, GPIO_OUTPUT_HIGH); // set P0.28 ACTIVE HIGH, that pulls up the PS_HOLD line for the hardware switch which provides the supply voltage permanently
	
	/* BEGIN BOOT */
	int err;

	// Initializes the RGB LED, the thread for state changing on this LED & set STATE_BOOT
	rgb_io_init();			// initialize the RGB LED as well as the status display system | initializes the (low prior) thread for handling the given app states on the RGB LED
	err = rgb_io_update_app_state(RGB_IO_APP_STATE_TYPE_BASE, RGB_IO_BASE_STATE_BOOT, 50);					// indicate on RGB LED: boot start sequence
	while (err) err = rgb_io_update_app_state(RGB_IO_APP_STATE_TYPE_BASE, RGB_IO_BASE_STATE_BOOT, 50);		// retry if not successful, e.g. get no system time

	/**
	 * Initialize the serial interface
	 * 
	 * It sets a callback function 'serial_cb' for handling incoming data and enables UART receive interrupts. 
 	 * If there is an error in setting the callback, it prints an appropriate error message. 
 	 * Procedure:   1. check if device is ready (statically created uart_device, that points to uart-alias in the overlay.)
 	 *              2. enable USB subsystem [usb_enable()] and associated hardware ( if the underlying platform supports that, e.g. nRF52832 don't supports that )
 	 *              3. get UART line control (with DTR - data terminal ready) -> waits as long as the system initiates UART as well as the control of DTR state
 	 *              4. test the interrupt endpoint, in that way that a DSR and a DCD are placed on the controlled line | check also baudrate
 	 *              5. set interrupt handler (callback function) and enables the RX interrupt
	 */
	init_serial();	// enable USB, initialize UART, printing LOG messages as well as 'printk'-outputs
	
	k_sleep(K_MSEC(500)); // spend further bootup time 500 ms => for stabilization the hardware stacks

	err = bt_enable(bt_ready); // calls the BT enable function in hci_core.c and passes our callback function to our BT Mesh clients 
	if (err) { LOG_ERR("Bluetooth init failed (err %d)", err); }

	k_sleep(K_MSEC(2000));	// wait for the hardware

	err = rgb_io_update_app_state(RGB_IO_APP_STATE_TYPE_BASE, RGB_IO_BASE_STATE_BOOT_FIN, 50);				// indicate on LED: boot finished
	while (err) err = rgb_io_update_app_state(RGB_IO_APP_STATE_TYPE_BASE, RGB_IO_BASE_STATE_BOOT_FIN, 50);	// retry if not successful, e.g. get no system time
	LOG_INF("...booting is done!");
	/* END BOOT */

	err = rgb_io_update_app_state(RGB_IO_APP_STATE_TYPE_BASE, RGB_IO_BASE_STATE_RUN, 50);					// indicate on LED: running state
	while (err) err = rgb_io_update_app_state(RGB_IO_APP_STATE_TYPE_BASE, RGB_IO_BASE_STATE_RUN, 50);		// retry if not successful, e.g. get no system time

	return 0;
}

After the build process for the nRF52840 DK (no warnings, no errors) and the subsequent flashing, everything works perfectly. The serial interface shows me all log and output data and the processed data is sent to the mesh.

When I create a build for the dongle, the serial interface and the RGB LED on the system work, but only up to the point at which I want to initialise the BT Mesh. At this point, the system hangs and does not continue. The terminal can no longer connect to the serial interface and the RGB LED no longer changes its status.

I have already looked at the complete generated .configs of both system builds, but have not really found the decisive clue as to why it runs on the DK system and on the dongle only when either the serial interface or Bluetooth is switched off.

It would be great if you could take a look at the generated configs or use your wealth of experience to give me a tip as to why the USB / Mesh combination does not work on the dongle.
For a better overview, I have compared the two generated configuration files and copied all the differences to the top (after this line --- everthing is equal). This way you can see the different configuration attributes at a glance when comparing them in an editor; the generated configs are quite long. Hope that helps.

And of course, I can share the complete project, but I think it's a bit too much for now.

Thanks in advance for any help
best regards
uli

Config Files: 8764.build_config_nrf5240_DK.txt   0830.build_config_nrf5240_dongle.txt 

DTS-File nRF52840 DK: 

/dts-v1/;

/ {
	#address-cells = < 0x1 >;
	#size-cells = < 0x1 >;
	model = "Nordic nRF52840 DK NRF52840";
	compatible = "nordic,nrf52840-dk-nrf52840";
	chosen {
		zephyr,entropy = &cryptocell;
		zephyr,flash-controller = &flash_controller;
		zephyr,console = &cdc_acm_uart0;
		zephyr,shell-uart = &cdc_acm_uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,bt-mon-uart = &uart0;
		zephyr,bt-c2h-uart = &uart0;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
		zephyr,ieee802154 = &ieee802154;
	};
	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
		sw0 = &button0;
		sw1 = &button1;
		sw2 = &button2;
		sw3 = &button3;
		bootloader-led0 = &led0;
		mcuboot-button0 = &button0;
		mcuboot-led0 = &led0;
		watchdog0 = &wdt0;
		spi-flash0 = &mx25r64;
		sensovo-uart = &cdc_acm_uart0;
		red-pwm-led = &red_pwm_led;
		green-pwm-led = &green_pwm_led;
		blue-pwm-led = &blue_pwm_led;
		ps-hold-pin = &gpio0;
	};
	soc {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		compatible = "nordic,nRF52840-QIAA", "nordic,nRF52840", "nordic,nRF52", "simple-bus";
		interrupt-parent = < &nvic >;
		ranges;
		nvic: interrupt-controller@e000e100 {
			#address-cells = < 0x1 >;
			compatible = "arm,v7m-nvic";
			reg = < 0xe000e100 0xc00 >;
			interrupt-controller;
			#interrupt-cells = < 0x2 >;
			arm,num-irq-priority-bits = < 0x3 >;
			phandle = < 0x1 >;
		};
		systick: timer@e000e010 {
			compatible = "arm,armv7m-systick";
			reg = < 0xe000e010 0x10 >;
			status = "disabled";
		};
		ficr: ficr@10000000 {
			compatible = "nordic,nrf-ficr";
			reg = < 0x10000000 0x1000 >;
			status = "okay";
		};
		uicr: uicr@10001000 {
			compatible = "nordic,nrf-uicr";
			reg = < 0x10001000 0x1000 >;
			status = "okay";
		};
		sram0: memory@20000000 {
			compatible = "mmio-sram";
			reg = < 0x20000000 0x40000 >;
		};
		clock: clock@40000000 {
			compatible = "nordic,nrf-clock";
			reg = < 0x40000000 0x1000 >;
			interrupts = < 0x0 0x1 >;
			status = "okay";
		};
		power: power@40000000 {
			compatible = "nordic,nrf-power";
			reg = < 0x40000000 0x1000 >;
			interrupts = < 0x0 0x1 >;
			status = "okay";
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			gpregret1: gpregret1@4000051c {
				compatible = "nordic,nrf-gpregret";
				reg = < 0x4000051c 0x1 >;
				status = "okay";
			};
			gpregret2: gpregret2@40000520 {
				compatible = "nordic,nrf-gpregret";
				reg = < 0x40000520 0x1 >;
				status = "okay";
			};
		};
		radio: radio@40001000 {
			compatible = "nordic,nrf-radio";
			reg = < 0x40001000 0x1000 >;
			interrupts = < 0x1 0x1 >;
			status = "okay";
			ieee802154-supported;
			ble-2mbps-supported;
			ble-coded-phy-supported;
			tx-high-power-supported;
			ieee802154: ieee802154 {
				compatible = "nordic,nrf-ieee802154";
				status = "okay";
			};
		};
		uart0: uart@40002000 {
			compatible = "nordic,nrf-uarte";
			reg = < 0x40002000 0x1000 >;
			interrupts = < 0x2 0x1 >;
			status = "okay";
			current-speed = < 0x1c200 >;
			pinctrl-0 = < &uart0_default >;
			pinctrl-1 = < &uart0_sleep >;
			pinctrl-names = "default", "sleep";
		};
		i2c0: arduino_i2c: i2c@40003000 {
			compatible = "nordic,nrf-twi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40003000 0x1000 >;
			clock-frequency = < 0x186a0 >;
			interrupts = < 0x3 0x1 >;
			status = "okay";
			pinctrl-0 = < &i2c0_default >;
			pinctrl-1 = < &i2c0_sleep >;
			pinctrl-names = "default", "sleep";
		};
		spi0: spi@40003000 {
			compatible = "nordic,nrf-spi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40003000 0x1000 >;
			interrupts = < 0x3 0x1 >;
			max-frequency = < 0x7a1200 >;
			easydma-maxcnt-bits = < 0x10 >;
			status = "disabled";
			pinctrl-0 = < &spi0_default >;
			pinctrl-1 = < &spi0_sleep >;
			pinctrl-names = "default", "sleep";
		};
		i2c1: i2c@40004000 {
			compatible = "nordic,nrf-twi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40004000 0x1000 >;
			clock-frequency = < 0x186a0 >;
			interrupts = < 0x4 0x1 >;
			status = "disabled";
			pinctrl-0 = < &i2c1_default >;
			pinctrl-1 = < &i2c1_sleep >;
			pinctrl-names = "default", "sleep";
		};
		spi1: spi@40004000 {
			compatible = "nordic,nrf-spi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40004000 0x1000 >;
			interrupts = < 0x4 0x1 >;
			max-frequency = < 0x7a1200 >;
			easydma-maxcnt-bits = < 0x10 >;
			status = "okay";
			pinctrl-0 = < &spi1_default >;
			pinctrl-1 = < &spi1_sleep >;
			pinctrl-names = "default", "sleep";
		};
		nfct: nfct@40005000 {
			compatible = "nordic,nrf-nfct";
			reg = < 0x40005000 0x1000 >;
			interrupts = < 0x5 0x1 >;
			status = "okay";
		};
		gpiote: gpiote@40006000 {
			compatible = "nordic,nrf-gpiote";
			reg = < 0x40006000 0x1000 >;
			interrupts = < 0x6 0x5 >;
			status = "okay";
		};
		adc: adc@40007000 {
			compatible = "nordic,nrf-saadc";
			reg = < 0x40007000 0x1000 >;
			interrupts = < 0x7 0x1 >;
			status = "okay";
			#io-channel-cells = < 0x1 >;
			phandle = < 0x1b >;
		};
		timer0: timer@40008000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x40008000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x8 0x1 >;
			prescaler = < 0x0 >;
		};
		timer1: timer@40009000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x40009000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x9 0x1 >;
			prescaler = < 0x0 >;
		};
		timer2: timer@4000a000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x4000a000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0xa 0x1 >;
			prescaler = < 0x0 >;
			phandle = < 0x17 >;
		};
		rtc0: rtc@4000b000 {
			compatible = "nordic,nrf-rtc";
			reg = < 0x4000b000 0x1000 >;
			cc-num = < 0x3 >;
			interrupts = < 0xb 0x1 >;
			status = "disabled";
			clock-frequency = < 0x8000 >;
			prescaler = < 0x1 >;
		};
		temp: temp@4000c000 {
			compatible = "nordic,nrf-temp";
			reg = < 0x4000c000 0x1000 >;
			interrupts = < 0xc 0x1 >;
			status = "okay";
		};
		rng: random@4000d000 {
			compatible = "nordic,nrf-rng";
			reg = < 0x4000d000 0x1000 >;
			interrupts = < 0xd 0x1 >;
			status = "okay";
		};
		ecb: ecb@4000e000 {
			compatible = "nordic,nrf-ecb";
			reg = < 0x4000e000 0x1000 >;
			interrupts = < 0xe 0x1 >;
			status = "okay";
		};
		ccm: ccm@4000f000 {
			compatible = "nordic,nrf-ccm";
			reg = < 0x4000f000 0x1000 >;
			interrupts = < 0xf 0x1 >;
			length-field-length-8-bits;
			status = "okay";
		};
		wdt: wdt0: watchdog@40010000 {
			compatible = "nordic,nrf-wdt";
			reg = < 0x40010000 0x1000 >;
			interrupts = < 0x10 0x1 >;
			status = "okay";
		};
		rtc1: rtc@40011000 {
			compatible = "nordic,nrf-rtc";
			reg = < 0x40011000 0x1000 >;
			cc-num = < 0x4 >;
			interrupts = < 0x11 0x1 >;
			status = "disabled";
			clock-frequency = < 0x8000 >;
			prescaler = < 0x1 >;
		};
		qdec: qdec0: qdec@40012000 {
			compatible = "nordic,nrf-qdec";
			reg = < 0x40012000 0x1000 >;
			interrupts = < 0x12 0x1 >;
			status = "disabled";
		};
		comp: comparator@40013000 {
			compatible = "nordic,nrf-comp";
			reg = < 0x40013000 0x1000 >;
			interrupts = < 0x13 0x1 >;
			status = "disabled";
			#io-channel-cells = < 0x1 >;
		};
		egu0: swi0: egu@40014000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40014000 0x1000 >;
			interrupts = < 0x14 0x1 >;
			status = "okay";
		};
		egu1: swi1: egu@40015000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40015000 0x1000 >;
			interrupts = < 0x15 0x1 >;
			status = "okay";
		};
		egu2: swi2: egu@40016000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40016000 0x1000 >;
			interrupts = < 0x16 0x1 >;
			status = "okay";
		};
		egu3: swi3: egu@40017000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40017000 0x1000 >;
			interrupts = < 0x17 0x1 >;
			status = "okay";
		};
		egu4: swi4: egu@40018000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40018000 0x1000 >;
			interrupts = < 0x18 0x1 >;
			status = "okay";
		};
		egu5: swi5: egu@40019000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40019000 0x1000 >;
			interrupts = < 0x19 0x1 >;
			status = "okay";
		};
		timer3: timer@4001a000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x4001a000 0x1000 >;
			cc-num = < 0x6 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x1a 0x1 >;
			prescaler = < 0x0 >;
		};
		timer4: timer@4001b000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x4001b000 0x1000 >;
			cc-num = < 0x6 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x1b 0x1 >;
			prescaler = < 0x0 >;
		};
		pwm0: pwm@4001c000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x4001c000 0x1000 >;
			interrupts = < 0x1c 0x1 >;
			status = "okay";
			#pwm-cells = < 0x3 >;
			pinctrl-0 = < &pwm0_default >;
			pinctrl-1 = < &pwm0_sleep >;
			pinctrl-names = "default", "sleep";
			phandle = < 0x19 >;
		};
		pdm0: pdm@4001d000 {
			compatible = "nordic,nrf-pdm";
			reg = < 0x4001d000 0x1000 >;
			interrupts = < 0x1d 0x1 >;
			status = "disabled";
		};
		acl: acl@4001e000 {
			compatible = "nordic,nrf-acl";
			reg = < 0x4001e000 0x1000 >;
			status = "okay";
		};
		flash_controller: flash-controller@4001e000 {
			compatible = "nordic,nrf52-flash-controller";
			reg = < 0x4001e000 0x1000 >;
			partial-erase;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			flash0: flash@0 {
				compatible = "soc-nv-flash";
				erase-block-size = < 0x1000 >;
				write-block-size = < 0x4 >;
				reg = < 0x0 0x100000 >;
				partitions {
					compatible = "fixed-partitions";
					#address-cells = < 0x1 >;
					#size-cells = < 0x1 >;
					boot_partition: partition@0 {
						label = "mcuboot";
						reg = < 0x0 0xc000 >;
					};
					slot0_partition: partition@c000 {
						label = "image-0";
						reg = < 0xc000 0x76000 >;
					};
					slot1_partition: partition@82000 {
						label = "image-1";
						reg = < 0x82000 0x76000 >;
					};
					storage_partition: partition@f8000 {
						label = "storage";
						reg = < 0xf8000 0x8000 >;
					};
				};
			};
		};
		ppi: ppi@4001f000 {
			compatible = "nordic,nrf-ppi";
			reg = < 0x4001f000 0x1000 >;
			status = "okay";
		};
		mwu: mwu@40020000 {
			compatible = "nordic,nrf-mwu";
			reg = < 0x40020000 0x1000 >;
			status = "okay";
		};
		pwm1: pwm@40021000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x40021000 0x1000 >;
			interrupts = < 0x21 0x1 >;
			status = "disabled";
			#pwm-cells = < 0x3 >;
		};
		pwm2: pwm@40022000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x40022000 0x1000 >;
			interrupts = < 0x22 0x1 >;
			status = "disabled";
			#pwm-cells = < 0x3 >;
		};
		spi2: spi@40023000 {
			compatible = "nordic,nrf-spi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40023000 0x1000 >;
			interrupts = < 0x23 0x1 >;
			max-frequency = < 0x7a1200 >;
			easydma-maxcnt-bits = < 0x10 >;
			status = "disabled";
			pinctrl-0 = < &spi2_default >;
			pinctrl-1 = < &spi2_sleep >;
			pinctrl-names = "default", "sleep";
		};
		rtc2: rtc@40024000 {
			compatible = "nordic,nrf-rtc";
			reg = < 0x40024000 0x1000 >;
			cc-num = < 0x4 >;
			interrupts = < 0x24 0x1 >;
			status = "disabled";
			clock-frequency = < 0x8000 >;
			prescaler = < 0x1 >;
		};
		i2s0: i2s@40025000 {
			compatible = "nordic,nrf-i2s";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40025000 0x1000 >;
			interrupts = < 0x25 0x1 >;
			status = "disabled";
		};
		usbd: zephyr_udc0: usbd@40027000 {
			compatible = "nordic,nrf-usbd";
			reg = < 0x40027000 0x1000 >;
			interrupts = < 0x27 0x1 >;
			num-bidir-endpoints = < 0x1 >;
			num-in-endpoints = < 0x7 >;
			num-out-endpoints = < 0x7 >;
			num-isoin-endpoints = < 0x1 >;
			num-isoout-endpoints = < 0x1 >;
			status = "okay";
			cdc_acm_uart0: cdc_acm_uart0 {
				compatible = "zephyr,cdc-acm-uart";
			};
		};
		uart1: arduino_serial: uart@40028000 {
			compatible = "nordic,nrf-uarte";
			reg = < 0x40028000 0x1000 >;
			interrupts = < 0x28 0x1 >;
			status = "disabled";
			current-speed = < 0x1c200 >;
			pinctrl-0 = < &uart1_default >;
			pinctrl-1 = < &uart1_sleep >;
			pinctrl-names = "default", "sleep";
		};
		qspi: qspi@40029000 {
			compatible = "nordic,nrf-qspi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40029000 0x1000 >, < 0x12000000 0x8000000 >;
			reg-names = "qspi", "qspi_mm";
			interrupts = < 0x29 0x1 >;
			status = "okay";
			pinctrl-0 = < &qspi_default >;
			pinctrl-1 = < &qspi_sleep >;
			pinctrl-names = "default", "sleep";
			mx25r64: mx25r6435f@0 {
				compatible = "nordic,qspi-nor";
				reg = < 0x0 >;
				writeoc = "pp4io";
				readoc = "read4io";
				sck-frequency = < 0x7a1200 >;
				jedec-id = [ C2 28 17 ];
				sfdp-bfp = [ E5 20 F1 FF FF FF FF 03 44 EB 08 6B 08 3B 04 BB EE FF FF FF FF FF 00 FF FF FF 00 FF 0C 20 0F 52 10 D8 00 FF 23 72 F5 00 82 ED 04 CC 44 83 68 44 30 B0 30 B0 F7 C4 D5 5C 00 BE 29 FF F0 D0 FF FF ];
				size = < 0x4000000 >;
				has-dpd;
				t-enter-dpd = < 0x2710 >;
				t-exit-dpd = < 0x88b8 >;
			};
		};
		pwm3: pwm@4002d000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x4002d000 0x1000 >;
			interrupts = < 0x2d 0x1 >;
			status = "disabled";
			#pwm-cells = < 0x3 >;
		};
		spi3: arduino_spi: spi@4002f000 {
			compatible = "nordic,nrf-spim";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x4002f000 0x1000 >;
			interrupts = < 0x2f 0x1 >;
			max-frequency = < 0x1e84800 >;
			easydma-maxcnt-bits = < 0x10 >;
			rx-delay-supported;
			rx-delay = < 0x2 >;
			status = "okay";
			cs-gpios = < &arduino_header 0x10 0x1 >;
			pinctrl-0 = < &spi3_default >;
			pinctrl-1 = < &spi3_sleep >;
			pinctrl-names = "default", "sleep";
		};
		gpio0: gpio@50000000 {
			compatible = "nordic,nrf-gpio";
			gpio-controller;
			reg = < 0x50000000 0x200 0x50000500 0x300 >;
			#gpio-cells = < 0x2 >;
			status = "okay";
			port = < 0x0 >;
			phandle = < 0x18 >;
		};
		gpio1: gpio@50000300 {
			compatible = "nordic,nrf-gpio";
			gpio-controller;
			reg = < 0x50000300 0x200 0x50000800 0x300 >;
			#gpio-cells = < 0x2 >;
			ngpios = < 0x10 >;
			status = "okay";
			port = < 0x1 >;
			phandle = < 0x1a >;
		};
		cryptocell: crypto@5002a000 {
			compatible = "nordic,nrf-cc310";
			reg = < 0x5002a000 0x1000 >;
			status = "okay";
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			cryptocell310: crypto@5002b000 {
				compatible = "arm,cryptocell-310";
				reg = < 0x5002b000 0x1000 >;
				interrupts = < 0x2a 0x1 >;
			};
		};
	};
	pinctrl: pin-controller {
		compatible = "nordic,nrf-pinctrl";
		uart0_default: uart0_default {
			phandle = < 0x2 >;
			group1 {
				psels = < 0x6 >, < 0x20005 >;
			};
			group2 {
				psels = < 0x10008 >, < 0x30007 >;
				bias-pull-up;
			};
		};
		uart0_sleep: uart0_sleep {
			phandle = < 0x3 >;
			group1 {
				psels = < 0x6 >, < 0x10008 >, < 0x20005 >, < 0x30007 >;
				low-power-enable;
			};
		};
		uart1_default: uart1_default {
			phandle = < 0x10 >;
			group1 {
				psels = < 0x10021 >;
				bias-pull-up;
			};
			group2 {
				psels = < 0x22 >;
			};
		};
		uart1_sleep: uart1_sleep {
			phandle = < 0x11 >;
			group1 {
				psels = < 0x10021 >, < 0x22 >;
				low-power-enable;
			};
		};
		i2c0_default: i2c0_default {
			phandle = < 0x4 >;
			group1 {
				psels = < 0xc001a >, < 0xb001b >;
			};
		};
		i2c0_sleep: i2c0_sleep {
			phandle = < 0x5 >;
			group1 {
				psels = < 0xc001a >, < 0xb001b >;
				low-power-enable;
			};
		};
		i2c1_default: i2c1_default {
			phandle = < 0x8 >;
			group1 {
				psels = < 0xc001e >, < 0xb001f >;
			};
		};
		i2c1_sleep: i2c1_sleep {
			phandle = < 0x9 >;
			group1 {
				psels = < 0xc001e >, < 0xb001f >;
				low-power-enable;
			};
		};
		pwm0_default: pwm0_default {
			phandle = < 0xc >;
			group1 {
				psels = < 0x16000d >, < 0x17000e >, < 0x18000f >;
				nordic,invert;
			};
		};
		pwm0_sleep: pwm0_sleep {
			phandle = < 0xd >;
			group1 {
				psels = < 0x16000d >, < 0x17000e >, < 0x18000f >;
				low-power-enable;
			};
		};
		spi0_default: spi0_default {
			phandle = < 0x6 >;
			group1 {
				psels = < 0x4001b >, < 0x5001a >, < 0x6001d >;
			};
		};
		spi0_sleep: spi0_sleep {
			phandle = < 0x7 >;
			group1 {
				psels = < 0x4001b >, < 0x5001a >, < 0x6001d >;
				low-power-enable;
			};
		};
		spi1_default: spi1_default {
			phandle = < 0xa >;
			group1 {
				psels = < 0x4001f >, < 0x5001e >, < 0x60028 >;
			};
		};
		spi1_sleep: spi1_sleep {
			phandle = < 0xb >;
			group1 {
				psels = < 0x4001f >, < 0x5001e >, < 0x60028 >;
				low-power-enable;
			};
		};
		spi2_default: spi2_default {
			phandle = < 0xe >;
			group1 {
				psels = < 0x40013 >, < 0x50014 >, < 0x60015 >;
			};
		};
		spi2_sleep: spi2_sleep {
			phandle = < 0xf >;
			group1 {
				psels = < 0x40013 >, < 0x50014 >, < 0x60015 >;
				low-power-enable;
			};
		};
		qspi_default: qspi_default {
			phandle = < 0x12 >;
			group1 {
				psels = < 0x1d0013 >, < 0x1f0014 >, < 0x200015 >, < 0x210016 >, < 0x220017 >, < 0x1e0011 >;
				nordic,drive-mode = < 0x3 >;
			};
		};
		qspi_sleep: qspi_sleep {
			phandle = < 0x13 >;
			group1 {
				psels = < 0x1d0013 >, < 0x1f0014 >, < 0x200015 >, < 0x210016 >, < 0x220017 >;
				low-power-enable;
			};
			group2 {
				psels = < 0x1e0011 >;
				low-power-enable;
				bias-pull-up;
			};
		};
		spi3_default: spi3_default {
			phandle = < 0x15 >;
			group1 {
				psels = < 0x4002f >, < 0x6002e >, < 0x5002d >;
			};
		};
		spi3_sleep: spi3_sleep {
			phandle = < 0x16 >;
			group1 {
				psels = < 0x4002f >, < 0x6002e >, < 0x5002d >;
				low-power-enable;
			};
		};
	};
	rng_hci: entropy_bt_hci {
		compatible = "zephyr,bt-hci-entropy";
		status = "okay";
	};
	cpus {
		#address-cells = < 0x1 >;
		#size-cells = < 0x0 >;
		cpu@0 {
			device_type = "cpu";
			compatible = "arm,cortex-m4f";
			reg = < 0x0 >;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			itm: itm@e0000000 {
				compatible = "arm,armv7m-itm";
				reg = < 0xe0000000 0x1000 >;
				swo-ref-frequency = < 0x1e84800 >;
			};
		};
	};
	sw_pwm: sw-pwm {
		compatible = "nordic,nrf-sw-pwm";
		status = "disabled";
		generator = < &timer2 >;
		clock-prescaler = < 0x0 >;
		#pwm-cells = < 0x3 >;
	};
	leds {
		compatible = "gpio-leds";
		led0: led_0 {
			gpios = < &gpio0 0xd 0x1 >;
			label = "Green LED 0";
		};
		led1: led_1 {
			gpios = < &gpio0 0xe 0x1 >;
			label = "Green LED 1";
		};
		led2: led_2 {
			gpios = < &gpio0 0xf 0x1 >;
			label = "Green LED 2";
		};
		led3: led_3 {
			gpios = < &gpio0 0x10 0x1 >;
			label = "Green LED 3";
		};
	};
	pwmleds {
		compatible = "pwm-leds";
		red_pwm_led: red_pwm_led {
			pwms = < &pwm0 0x0 0x989680 0x1 >;
			label = "red channel";
		};
		green_pwm_led: green_pwm_led {
			pwms = < &pwm0 0x1 0x989680 0x1 >;
			label = "green channel";
		};
		blue_pwm_led: blue_pwm_led {
			pwms = < &pwm0 0x2 0x989680 0x1 >;
			label = "blue channel";
		};
	};
	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			gpios = < &gpio0 0xb 0x11 >;
			label = "Push button switch 0";
		};
		button1: button_1 {
			gpios = < &gpio0 0xc 0x11 >;
			label = "Push button switch 1";
		};
		button2: button_2 {
			gpios = < &gpio0 0x18 0x11 >;
			label = "Push button switch 2";
		};
		button3: button_3 {
			gpios = < &gpio0 0x19 0x11 >;
			label = "Push button switch 3";
		};
	};
	arduino_header: connector {
		compatible = "arduino-header-r3";
		#gpio-cells = < 0x2 >;
		gpio-map-mask = < 0xffffffff 0xffffffc0 >;
		gpio-map-pass-thru = < 0x0 0x3f >;
		gpio-map = < 0x0 0x0 &gpio0 0x3 0x0 >, < 0x1 0x0 &gpio0 0x4 0x0 >, < 0x2 0x0 &gpio0 0x1c 0x0 >, < 0x3 0x0 &gpio0 0x1d 0x0 >, < 0x4 0x0 &gpio0 0x1e 0x0 >, < 0x5 0x0 &gpio0 0x1f 0x0 >, < 0x6 0x0 &gpio1 0x1 0x0 >, < 0x7 0x0 &gpio1 0x2 0x0 >, < 0x8 0x0 &gpio1 0x3 0x0 >, < 0x9 0x0 &gpio1 0x4 0x0 >, < 0xa 0x0 &gpio1 0x5 0x0 >, < 0xb 0x0 &gpio1 0x6 0x0 >, < 0xc 0x0 &gpio1 0x7 0x0 >, < 0xd 0x0 &gpio1 0x8 0x0 >, < 0xe 0x0 &gpio1 0xa 0x0 >, < 0xf 0x0 &gpio1 0xb 0x0 >, < 0x10 0x0 &gpio1 0xc 0x0 >, < 0x11 0x0 &gpio1 0xd 0x0 >, < 0x12 0x0 &gpio1 0xe 0x0 >, < 0x13 0x0 &gpio1 0xf 0x0 >, < 0x14 0x0 &gpio0 0x1a 0x0 >, < 0x15 0x0 &gpio0 0x1b 0x0 >;
		phandle = < 0x14 >;
	};
	arduino_adc: analog-connector {
		compatible = "arduino,uno-adc";
		#io-channel-cells = < 0x1 >;
		io-channel-map = < 0x0 &adc 0x1 >, < 0x1 &adc 0x2 >, < 0x2 &adc 0x4 >, < 0x3 &adc 0x5 >, < 0x4 &adc 0x6 >, < 0x5 &adc 0x7 >;
	};
	zephyr,user {
		ps_hold_pin-gpios = < &gpio0 0x1c 0x0 >;
	};
};

    DTS-File nRF52840 Dongle:  

/dts-v1/;

/ {
	#address-cells = < 0x1 >;
	#size-cells = < 0x1 >;
	model = "Nordic nRF52840 Dongle NRF52840";
	compatible = "nordic,nrf52840-dongle-nrf52840";
	chosen {
		zephyr,entropy = &cryptocell;
		zephyr,flash-controller = &flash_controller;
		zephyr,console = &cdc_acm_uart;
		zephyr,shell-uart = &cdc_acm_uart;
		zephyr,uart-mcumgr = &cdc_acm_uart;
		zephyr,bt-mon-uart = &cdc_acm_uart;
		zephyr,bt-c2h-uart = &cdc_acm_uart;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
		zephyr,ieee802154 = &ieee802154;
	};
	aliases {
		sw0 = &button0;
		led0 = &led0_green;
		led1 = &led1_red;
		led2 = &led1_green;
		led3 = &led1_blue;
		led0-green = &led0_green;
		led1-red = &led1_red;
		led1-green = &led1_green;
		led1-blue = &led1_blue;
		pwm-led0 = &red_pwm_led;
		pwm-led1 = &green_pwm_led;
		pwm-led2 = &blue_pwm_led;
		red-pwm-led = &red_pwm_led;
		green-pwm-led = &green_pwm_led;
		blue-pwm-led = &blue_pwm_led;
		mcuboot-button0 = &button0;
		mcuboot-led0 = &led0_green;
		watchdog0 = &wdt0;
		sensovo-uart = &cdc_acm_uart;
	};
	soc {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		compatible = "nordic,nRF52840-QIAA", "nordic,nRF52840", "nordic,nRF52", "simple-bus";
		interrupt-parent = < &nvic >;
		ranges;
		nvic: interrupt-controller@e000e100 {
			#address-cells = < 0x1 >;
			compatible = "arm,v7m-nvic";
			reg = < 0xe000e100 0xc00 >;
			interrupt-controller;
			#interrupt-cells = < 0x2 >;
			arm,num-irq-priority-bits = < 0x3 >;
			phandle = < 0x1 >;
		};
		systick: timer@e000e010 {
			compatible = "arm,armv7m-systick";
			reg = < 0xe000e010 0x10 >;
			status = "disabled";
		};
		ficr: ficr@10000000 {
			compatible = "nordic,nrf-ficr";
			reg = < 0x10000000 0x1000 >;
			status = "okay";
		};
		uicr: uicr@10001000 {
			compatible = "nordic,nrf-uicr";
			reg = < 0x10001000 0x1000 >;
			status = "okay";
		};
		sram0: memory@20000000 {
			compatible = "mmio-sram";
			reg = < 0x20000000 0x40000 >;
		};
		clock: clock@40000000 {
			compatible = "nordic,nrf-clock";
			reg = < 0x40000000 0x1000 >;
			interrupts = < 0x0 0x1 >;
			status = "okay";
		};
		power: power@40000000 {
			compatible = "nordic,nrf-power";
			reg = < 0x40000000 0x1000 >;
			interrupts = < 0x0 0x1 >;
			status = "okay";
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			gpregret1: gpregret1@4000051c {
				compatible = "nordic,nrf-gpregret";
				reg = < 0x4000051c 0x1 >;
				status = "okay";
			};
			gpregret2: gpregret2@40000520 {
				compatible = "nordic,nrf-gpregret";
				reg = < 0x40000520 0x1 >;
				status = "okay";
			};
		};
		radio: radio@40001000 {
			compatible = "nordic,nrf-radio";
			reg = < 0x40001000 0x1000 >;
			interrupts = < 0x1 0x1 >;
			status = "okay";
			ieee802154-supported;
			ble-2mbps-supported;
			ble-coded-phy-supported;
			tx-high-power-supported;
			ieee802154: ieee802154 {
				compatible = "nordic,nrf-ieee802154";
				status = "okay";
			};
		};
		uart0: uart@40002000 {
			compatible = "nordic,nrf-uarte";
			reg = < 0x40002000 0x1000 >;
			interrupts = < 0x2 0x1 >;
			status = "okay";
			current-speed = < 0x1c200 >;
			pinctrl-0 = < &uart0_default >;
			pinctrl-1 = < &uart0_sleep >;
			pinctrl-names = "default", "sleep";
		};
		i2c0: i2c@40003000 {
			compatible = "nordic,nrf-twi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40003000 0x1000 >;
			clock-frequency = < 0x186a0 >;
			interrupts = < 0x3 0x1 >;
			status = "okay";
			pinctrl-0 = < &i2c0_default >;
			pinctrl-1 = < &i2c0_sleep >;
			pinctrl-names = "default", "sleep";
		};
		spi0: spi@40003000 {
			compatible = "nordic,nrf-spi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40003000 0x1000 >;
			interrupts = < 0x3 0x1 >;
			max-frequency = < 0x7a1200 >;
			easydma-maxcnt-bits = < 0x10 >;
			status = "disabled";
			pinctrl-0 = < &spi0_default >;
			pinctrl-1 = < &spi0_sleep >;
			pinctrl-names = "default", "sleep";
		};
		i2c1: i2c@40004000 {
			compatible = "nordic,nrf-twi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40004000 0x1000 >;
			clock-frequency = < 0x186a0 >;
			interrupts = < 0x4 0x1 >;
			status = "disabled";
			pinctrl-0 = < &i2c1_default >;
			pinctrl-1 = < &i2c1_sleep >;
			pinctrl-names = "default", "sleep";
		};
		spi1: spi@40004000 {
			compatible = "nordic,nrf-spi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40004000 0x1000 >;
			interrupts = < 0x4 0x1 >;
			max-frequency = < 0x7a1200 >;
			easydma-maxcnt-bits = < 0x10 >;
			status = "okay";
			pinctrl-0 = < &spi1_default >;
			pinctrl-1 = < &spi1_sleep >;
			pinctrl-names = "default", "sleep";
		};
		nfct: nfct@40005000 {
			compatible = "nordic,nrf-nfct";
			reg = < 0x40005000 0x1000 >;
			interrupts = < 0x5 0x1 >;
			status = "okay";
		};
		gpiote: gpiote@40006000 {
			compatible = "nordic,nrf-gpiote";
			reg = < 0x40006000 0x1000 >;
			interrupts = < 0x6 0x5 >;
			status = "okay";
		};
		adc: adc@40007000 {
			compatible = "nordic,nrf-saadc";
			reg = < 0x40007000 0x1000 >;
			interrupts = < 0x7 0x1 >;
			status = "okay";
			#io-channel-cells = < 0x1 >;
		};
		timer0: timer@40008000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x40008000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x8 0x1 >;
			prescaler = < 0x0 >;
		};
		timer1: timer@40009000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x40009000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x9 0x1 >;
			prescaler = < 0x0 >;
		};
		timer2: timer@4000a000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x4000a000 0x1000 >;
			cc-num = < 0x4 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0xa 0x1 >;
			prescaler = < 0x0 >;
			phandle = < 0xe >;
		};
		rtc0: rtc@4000b000 {
			compatible = "nordic,nrf-rtc";
			reg = < 0x4000b000 0x1000 >;
			cc-num = < 0x3 >;
			interrupts = < 0xb 0x1 >;
			status = "disabled";
			clock-frequency = < 0x8000 >;
			prescaler = < 0x1 >;
		};
		temp: temp@4000c000 {
			compatible = "nordic,nrf-temp";
			reg = < 0x4000c000 0x1000 >;
			interrupts = < 0xc 0x1 >;
			status = "okay";
		};
		rng: random@4000d000 {
			compatible = "nordic,nrf-rng";
			reg = < 0x4000d000 0x1000 >;
			interrupts = < 0xd 0x1 >;
			status = "okay";
		};
		ecb: ecb@4000e000 {
			compatible = "nordic,nrf-ecb";
			reg = < 0x4000e000 0x1000 >;
			interrupts = < 0xe 0x1 >;
			status = "okay";
		};
		ccm: ccm@4000f000 {
			compatible = "nordic,nrf-ccm";
			reg = < 0x4000f000 0x1000 >;
			interrupts = < 0xf 0x1 >;
			length-field-length-8-bits;
			status = "okay";
		};
		wdt: wdt0: watchdog@40010000 {
			compatible = "nordic,nrf-wdt";
			reg = < 0x40010000 0x1000 >;
			interrupts = < 0x10 0x1 >;
			status = "okay";
		};
		rtc1: rtc@40011000 {
			compatible = "nordic,nrf-rtc";
			reg = < 0x40011000 0x1000 >;
			cc-num = < 0x4 >;
			interrupts = < 0x11 0x1 >;
			status = "disabled";
			clock-frequency = < 0x8000 >;
			prescaler = < 0x1 >;
		};
		qdec: qdec0: qdec@40012000 {
			compatible = "nordic,nrf-qdec";
			reg = < 0x40012000 0x1000 >;
			interrupts = < 0x12 0x1 >;
			status = "disabled";
		};
		comp: comparator@40013000 {
			compatible = "nordic,nrf-comp";
			reg = < 0x40013000 0x1000 >;
			interrupts = < 0x13 0x1 >;
			status = "disabled";
			#io-channel-cells = < 0x1 >;
		};
		egu0: swi0: egu@40014000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40014000 0x1000 >;
			interrupts = < 0x14 0x1 >;
			status = "okay";
		};
		egu1: swi1: egu@40015000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40015000 0x1000 >;
			interrupts = < 0x15 0x1 >;
			status = "okay";
		};
		egu2: swi2: egu@40016000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40016000 0x1000 >;
			interrupts = < 0x16 0x1 >;
			status = "okay";
		};
		egu3: swi3: egu@40017000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40017000 0x1000 >;
			interrupts = < 0x17 0x1 >;
			status = "okay";
		};
		egu4: swi4: egu@40018000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40018000 0x1000 >;
			interrupts = < 0x18 0x1 >;
			status = "okay";
		};
		egu5: swi5: egu@40019000 {
			compatible = "nordic,nrf-egu", "nordic,nrf-swi";
			reg = < 0x40019000 0x1000 >;
			interrupts = < 0x19 0x1 >;
			status = "okay";
		};
		timer3: timer@4001a000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x4001a000 0x1000 >;
			cc-num = < 0x6 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x1a 0x1 >;
			prescaler = < 0x0 >;
		};
		timer4: timer@4001b000 {
			compatible = "nordic,nrf-timer";
			status = "disabled";
			reg = < 0x4001b000 0x1000 >;
			cc-num = < 0x6 >;
			max-bit-width = < 0x20 >;
			interrupts = < 0x1b 0x1 >;
			prescaler = < 0x0 >;
		};
		pwm0: pwm@4001c000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x4001c000 0x1000 >;
			interrupts = < 0x1c 0x1 >;
			status = "okay";
			#pwm-cells = < 0x3 >;
			pinctrl-0 = < &pwm0_default >;
			pinctrl-1 = < &pwm0_sleep >;
			pinctrl-names = "default", "sleep";
			phandle = < 0x11 >;
		};
		pdm0: pdm@4001d000 {
			compatible = "nordic,nrf-pdm";
			reg = < 0x4001d000 0x1000 >;
			interrupts = < 0x1d 0x1 >;
			status = "disabled";
		};
		acl: acl@4001e000 {
			compatible = "nordic,nrf-acl";
			reg = < 0x4001e000 0x1000 >;
			status = "okay";
		};
		flash_controller: flash-controller@4001e000 {
			compatible = "nordic,nrf52-flash-controller";
			reg = < 0x4001e000 0x1000 >;
			partial-erase;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			flash0: flash@0 {
				compatible = "soc-nv-flash";
				erase-block-size = < 0x1000 >;
				write-block-size = < 0x4 >;
				reg = < 0x0 0x100000 >;
				partitions {
					compatible = "fixed-partitions";
					#address-cells = < 0x1 >;
					#size-cells = < 0x1 >;
					boot_partition: partition@1000 {
						label = "mcuboot";
						reg = < 0x1000 0xf000 >;
					};
					slot0_partition: partition@10000 {
						label = "image-0";
						reg = < 0x10000 0x66000 >;
					};
					slot1_partition: partition@76000 {
						label = "image-1";
						reg = < 0x76000 0x66000 >;
					};
					storage_partition: partition@dc000 {
						label = "storage";
						reg = < 0xdc000 0x4000 >;
					};
				};
			};
		};
		ppi: ppi@4001f000 {
			compatible = "nordic,nrf-ppi";
			reg = < 0x4001f000 0x1000 >;
			status = "okay";
		};
		mwu: mwu@40020000 {
			compatible = "nordic,nrf-mwu";
			reg = < 0x40020000 0x1000 >;
			status = "okay";
		};
		pwm1: pwm@40021000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x40021000 0x1000 >;
			interrupts = < 0x21 0x1 >;
			status = "disabled";
			#pwm-cells = < 0x3 >;
		};
		pwm2: pwm@40022000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x40022000 0x1000 >;
			interrupts = < 0x22 0x1 >;
			status = "disabled";
			#pwm-cells = < 0x3 >;
		};
		spi2: spi@40023000 {
			compatible = "nordic,nrf-spim";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40023000 0x1000 >;
			interrupts = < 0x23 0x1 >;
			max-frequency = < 0x7a1200 >;
			easydma-maxcnt-bits = < 0x10 >;
			status = "disabled";
		};
		rtc2: rtc@40024000 {
			compatible = "nordic,nrf-rtc";
			reg = < 0x40024000 0x1000 >;
			cc-num = < 0x4 >;
			interrupts = < 0x24 0x1 >;
			status = "disabled";
			clock-frequency = < 0x8000 >;
			prescaler = < 0x1 >;
		};
		i2s0: i2s@40025000 {
			compatible = "nordic,nrf-i2s";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40025000 0x1000 >;
			interrupts = < 0x25 0x1 >;
			status = "disabled";
		};
		usbd: zephyr_udc0: usbd@40027000 {
			compatible = "nordic,nrf-usbd";
			reg = < 0x40027000 0x1000 >;
			interrupts = < 0x27 0x1 >;
			num-bidir-endpoints = < 0x1 >;
			num-in-endpoints = < 0x7 >;
			num-out-endpoints = < 0x7 >;
			num-isoin-endpoints = < 0x1 >;
			num-isoout-endpoints = < 0x1 >;
			status = "okay";
			cdc_acm_uart: cdc_acm_uart {
				compatible = "zephyr,cdc-acm-uart";
			};
		};
		uart1: uart@40028000 {
			compatible = "nordic,nrf-uarte";
			reg = < 0x40028000 0x1000 >;
			interrupts = < 0x28 0x1 >;
			status = "disabled";
		};
		qspi: qspi@40029000 {
			compatible = "nordic,nrf-qspi";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x40029000 0x1000 >, < 0x12000000 0x8000000 >;
			reg-names = "qspi", "qspi_mm";
			interrupts = < 0x29 0x1 >;
			status = "disabled";
		};
		pwm3: pwm@4002d000 {
			compatible = "nordic,nrf-pwm";
			reg = < 0x4002d000 0x1000 >;
			interrupts = < 0x2d 0x1 >;
			status = "disabled";
			#pwm-cells = < 0x3 >;
		};
		spi3: spi@4002f000 {
			compatible = "nordic,nrf-spim";
			#address-cells = < 0x1 >;
			#size-cells = < 0x0 >;
			reg = < 0x4002f000 0x1000 >;
			interrupts = < 0x2f 0x1 >;
			max-frequency = < 0x1e84800 >;
			easydma-maxcnt-bits = < 0x10 >;
			rx-delay-supported;
			rx-delay = < 0x2 >;
			status = "disabled";
		};
		gpio0: gpio@50000000 {
			compatible = "nordic,nrf-gpio";
			gpio-controller;
			reg = < 0x50000000 0x200 0x50000500 0x300 >;
			#gpio-cells = < 0x2 >;
			status = "okay";
			port = < 0x0 >;
			phandle = < 0xf >;
		};
		gpio1: gpio@50000300 {
			compatible = "nordic,nrf-gpio";
			gpio-controller;
			reg = < 0x50000300 0x200 0x50000800 0x300 >;
			#gpio-cells = < 0x2 >;
			ngpios = < 0x10 >;
			status = "okay";
			port = < 0x1 >;
			phandle = < 0x10 >;
		};
		cryptocell: crypto@5002a000 {
			compatible = "nordic,nrf-cc310";
			reg = < 0x5002a000 0x1000 >;
			status = "okay";
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			cryptocell310: crypto@5002b000 {
				compatible = "arm,cryptocell-310";
				reg = < 0x5002b000 0x1000 >;
				interrupts = < 0x2a 0x1 >;
			};
		};
	};
	pinctrl: pin-controller {
		compatible = "nordic,nrf-pinctrl";
		uart0_default: uart0_default {
			phandle = < 0x2 >;
			group1 {
				psels = < 0x14 >, < 0x20011 >;
			};
			group2 {
				psels = < 0x10018 >, < 0x30016 >;
				bias-pull-up;
			};
		};
		uart0_sleep: uart0_sleep {
			phandle = < 0x3 >;
			group1 {
				psels = < 0x14 >, < 0x10018 >, < 0x20011 >, < 0x30016 >;
				low-power-enable;
			};
		};
		i2c0_default: i2c0_default {
			phandle = < 0x4 >;
			group1 {
				psels = < 0xc001a >, < 0xb001b >;
			};
		};
		i2c0_sleep: i2c0_sleep {
			phandle = < 0x5 >;
			group1 {
				psels = < 0xc001a >, < 0xb001b >;
				low-power-enable;
			};
		};
		i2c1_default: i2c1_default {
			phandle = < 0x8 >;
			group1 {
				psels = < 0xc001e >, < 0xb001f >;
			};
		};
		i2c1_sleep: i2c1_sleep {
			phandle = < 0x9 >;
			group1 {
				psels = < 0xc001e >, < 0xb001f >;
				low-power-enable;
			};
		};
		pwm0_default: pwm0_default {
			phandle = < 0xc >;
			group1 {
				psels = < 0x160008 >, < 0x170029 >, < 0x18000c >;
				nordic,invert;
			};
		};
		pwm0_sleep: pwm0_sleep {
			phandle = < 0xd >;
			group1 {
				psels = < 0x160008 >, < 0x170029 >, < 0x18000c >;
				low-power-enable;
			};
		};
		spi0_default: spi0_default {
			phandle = < 0x6 >;
			group1 {
				psels = < 0x4001b >, < 0x5001a >, < 0x6002a >;
			};
		};
		spi0_sleep: spi0_sleep {
			phandle = < 0x7 >;
			group1 {
				psels = < 0x4001b >, < 0x5001a >, < 0x6002a >;
				low-power-enable;
			};
		};
		spi1_default: spi1_default {
			phandle = < 0xa >;
			group1 {
				psels = < 0x4001f >, < 0x5001e >, < 0x6002d >;
			};
		};
		spi1_sleep: spi1_sleep {
			phandle = < 0xb >;
			group1 {
				psels = < 0x4001f >, < 0x5001e >, < 0x6002d >;
				low-power-enable;
			};
		};
	};
	rng_hci: entropy_bt_hci {
		compatible = "zephyr,bt-hci-entropy";
		status = "okay";
	};
	cpus {
		#address-cells = < 0x1 >;
		#size-cells = < 0x0 >;
		cpu@0 {
			device_type = "cpu";
			compatible = "arm,cortex-m4f";
			reg = < 0x0 >;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			itm: itm@e0000000 {
				compatible = "arm,armv7m-itm";
				reg = < 0xe0000000 0x1000 >;
				swo-ref-frequency = < 0x1e84800 >;
			};
		};
	};
	sw_pwm: sw-pwm {
		compatible = "nordic,nrf-sw-pwm";
		status = "disabled";
		generator = < &timer2 >;
		clock-prescaler = < 0x0 >;
		#pwm-cells = < 0x3 >;
	};
	leds {
		compatible = "gpio-leds";
		led0_green: led_0 {
			gpios = < &gpio0 0x6 0x1 >;
			label = "Green LED 0";
		};
		led1_red: led_1 {
			gpios = < &gpio0 0x8 0x1 >;
			label = "Red LED 1";
		};
		led1_green: led_2 {
			gpios = < &gpio1 0x9 0x1 >;
			label = "Green LED 1";
		};
		led1_blue: led_3 {
			gpios = < &gpio0 0xc 0x1 >;
			label = "Blue LED 1";
		};
	};
	pwmleds {
		compatible = "pwm-leds";
		red_pwm_led: red_pwm_led {
			pwms = < &pwm0 0x0 0x989680 0x1 >;
			label = "red channel";
		};
		green_pwm_led: green_pwm_led {
			pwms = < &pwm0 0x1 0x989680 0x1 >;
			label = "green channel";
		};
		blue_pwm_led: blue_pwm_led {
			pwms = < &pwm0 0x2 0x989680 0x1 >;
			label = "blue channel";
		};
	};
	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			gpios = < &gpio1 0x6 0x11 >;
			label = "Push button switch 0";
		};
	};
	zephyr,user {
		ps_hold_pin-gpios = < &gpio0 0x1d 0x0 >;
	};
};

P.S. here are the details of my setup - and please feel free to ask me if anything is unclear
---------------------------------------
OS: Windows 10
nRF Connect v5.0.2 (Programmer v4.4.0 / Terminal v1.4.1)
SDK v2.4.3 (Zephyr 3.3.99)
DK: NRF52840_xxAA_REV3
Dongle: NRF52840 (PCA 10059)
bt_hci_core: Firmware: Standard Bluetooth controller, Version 152.30490 Build 4211350319

[Edvin]

Hello Uli,

Thank you for clarifying  This was the kind of information I was fishing for, what you did with the bootloader, but it seems like you are on top of things. 

Some general hints:

The way you set up the different builds is not really how it is intended to be done. Although it may seem harmless to use prj_dongle.conf as the base configuration file, that will actually cause the rest of the project to fail. You see, if you set the base configuration file to prj_dongle.conf, it will also look for all the other files, such as board files, child image files ending in _dongle.*

This means e.g. that it will not automatically pick up the board files (if you had any).

So the "correct" way to do this is to use a common prj.conf file that will be used for all your different builds. Then you can add your prj_dongle.conf as an extra KConfig file by using the "Extra KConfig fragments" option. Alternatively, if you would have named the other conf file <board_name>.conf, like this:

nrf52840dongle_nrf52840.conf, 

then it will automatically be picked up as an extra KConfig fragment. The same goes for the .overlay files. If it was called nrf52840dongle_nrf52840.overlay, then the compiler will pick it up automatically. 

Anyway, it is possible to add any files as extra KConfig fragments.

Sorry that this took so long, but I needed to add a debug header to one of my nRF52840 dongles. 

When I ran your application (both on DK and dongle) it stopped at 

	LOG_INF("Wait for DTR");

	while (true) {
		uint32_t dtr = 0U;
		if ( (int_ret = uart_line_ctrl_get(uart_dev, UART_LINE_CTRL_DTR, &dtr)) ) {
		    LOG_ERR("Failed to retrieve line control for UART, ret code %d", int_ret);  // ENOTSUP = 134 -> Unsupported value | if API is not enabled // ENOSYS = 88 -> Function not implemented                                                                                      
	    }
        
		if (dtr) {
			break; // jump out of the while
		} 

        /* [else] Give CPU resources to low priority threads. */
		k_sleep(K_MSEC(100));
	}

I am not sure what is actually supposed to happen here. Perhaps I am using the wrong terminal or something. I read your last reply, and I understand that you did some changes, but I am not sure which ones. 

If I break out of this while loop, then I get a Bus Fault:

00> Sensovo Dongle (Zephyr OS Build v3.3.99-ncs1-2) is initializing...
00> 
00> [00:00:00.701,019] <inf> serial: Wait for DTR
00> [00:00:00.701,019] <inf> serial: DTR set
00> [00:00:00.842,285] <err> usb_nrfx: Endpoint 0x81 is not enabled
00> [00:00:01.094,573] <inf> serial: Baudrate detected: 115200
00> [00:00:01.701,965] <err> os: ***** BUS FAULT *****
00> [00:00:01.701,995] <err> os:   Imprecise data bus error[0m
00> [00:00:01.701,995] <err> os: r0/a1:  0x00000000  r1/a2:  0x2000bc2c  r2/a3:  0x20004f04
00> [00:00:01.702,026] <err> os: r3/a4:  0x00000000 r12/ip:  0x00000000 r14/lr:  0x0003ef5d
00> [00:00:01.702,026] <err> os:  xpsr:  0x61000000
00> [00:00:01.702,056] <err> os: Faulting instruction address (r15/pc): 0x0002396c
00> [00:00:01.702,087] <err> os: >>> ZEPHYR FATAL ERROR 26: Unknown error on CPU 0
00> [00:00:01.702,117] <err> os: Current thread: 0x20004cd0 (unknown)
00> [00:00:01.930,023] <err> fatal_error: Resetting system[0m

Is this what you are seeing as well?

Best regards,

Edvin

[uli_hn]

Dear Edvin,

Firstly, thank you for your comments regarding conf's and overlays. I actually knew that, but somehow, due to laziness and rapid prototyping, these features crept in, although it is much more convenient to do it the way you described. I have now rebuilt it

Regarding your issues: I had exactly the same problem (as described above). And the solution was not to change anything (in the code or in the settings), but simply not to interrupt the initialisation routines with debug breakpoints within the debug process. This applies to both: init serial interface and init BT Mesh!

Then everything runs smoothly. And the system works as it should. It receives data via the serial interface, analyses it and tries to send the analysis to the Mesh. In fact, I have now provisioned the dongle and the BT Mesh also receives all the data.

The error I have found is that flashing the dongle via the nRF52 DK works, but not via the bootloader. And this has nothing to do with my project. My project works with the dongle as long as it is flashed via the nRF52 DK.
And that shouldn't really be the case, should it?

Sunny regards Uli

[uli_hn]

Edvin said:

This means e.g. that it will not automatically pick up the board files (if you had any).

So the "correct" way to do this is to use a common prj.conf file that will be used for all your different builds. Then you can add your prj_dongle.conf as an extra KConfig file by using the "Extra KConfig fragments" option. Alternatively, if you would have named the other conf file <board_name>.conf, like this:

nrf52840dongle_nrf52840.conf, 

then it will automatically be picked up as an extra KConfig fragment. The same goes for the .overlay files. If it was called nrf52840dongle_nrf52840.overlay, then the compiler will pick it up automatically. 

Anyway, it is possible to add any files as extra KConfig fragments.

Hey Edvin,

One more thing: I have applied your explanations. Renaming the .overlay files leads to the desired success. They are automatically found and analysed as "Found devicetree overlay" during compilation. However, this does not work for the .conf files. I have to enter them manually in the "KConfig fragments", otherwise the compilation process is cancelled due to missing dependencies.

best uli

[Edvin]

uli_hn said:

... Do I have to switch anything off for this or are there dependencies that could then no longer work? Or do I just put this in and connect the RTT to the terminal under the "connected devices" in VS Code and it works?

It should be plug and play. I prefer to use a standalone RTT terminal, such as J-Link RTT Viewer, which is usually part of the JLink bundle. You probably have it installed already. 

The RTT log has no dependencies, other than that it takes a small amount of processing power, and some memory (RAM) for the log. Then it is the debugger that is being used to read the log from the internal memory, so no GPIOs or peripherals are needed for this. Please note, however, that you need to reconnect the RTT viewer every time you program the device, because building the application again can cause the location of this buffer to move, so you need to tell the RTT terminal that this has happened. 

uli_hn said:

One more thing: I have applied your explanations. Renaming the .overlay files leads to the desired success. They are automatically found and analysed as "Found devicetree overlay" during compilation. However, this does not work for the .conf files. I have to enter them manually in the "KConfig fragments", otherwise the compilation process is cancelled due to missing dependencies.

Sorry. What I said wasn't entirely correct. You can put the nrf52840dongle_nrf52840.conf in a folder named "boards", then it should be picked up, as long as you use the default prj.conf file. You can look at how this is done in the ncs\nrf\samples\peripheral_uart\ sample, where it has the boards folder containing the thingy prj.conf files. The folder structure needs to be correct in order for this to work, so if you just do it like it is done in this sample, it should be picked up. 

To make things worse, there are also several ways to acheive the same, so there is no "one rule to rule them all", unfortunately. You can read a bit about it here and here.

But the rule of thumb is that you should check your build log when you want to add new .conf or .overlay files. Then you will see what files that are included in your build.

uli_hn said:

The error I have found is that flashing the dongle via the nRF52 DK works, but not via the bootloader. And this has nothing to do with my project. My project works with the dongle as long as it is flashed via the nRF52 DK.

So you pointed to the nRF52840 dongle programming guide earlier. From there you can read that if you erase the bootloader, there are some things that you need to make sure in order for it to work properly. When building for the nRF52840 dongle in NCS then it will assume that the bootloader is still present, because this is the intended way to use the dongle. If the bootloader is not present, then there are a couple of things that you need to make sure, and it is probably best to do this by using a custom board, and copy a lot of it from the board files for the dongle. 

The main thing is that there is no longer a bootloader, so you would need to move the start address of the application from 0x1000 to 0x0000 (because there is no longer an MBR programmed).

Then you would need to read the section: "Using an external debugger" in the nRF52840 Dongle programming tutorial.

The thing is that the bootloader used to set the correct VREGOUT for the dongle. If this is erased, I am not sure whether or not you will be able to re-program it at all using a DK, or if you need a proper external programmer. You can of course give it a go, but the DKs are not properly tested for programming devices running at a different voltage than itself. So if you re-program the bootloader (you will find it in the linked guide), and then use the bootloader to load your application, and the debugger to debug, you should be fine.

If you want to properly skip the bootloader, make sure that you have all your start addresses set correctly, and that you do the REGOUT thing from the guide at the very start of your application. I am not completely sure, but it may work if you do it at the top of main. If not, you would need something like this in your main.c file. This will be called earlier in the bootup process, before the main() function is reached.

static int set_regulator(void)
{
  if ((NRF_UICR->REGOUT0 & UICR_REGOUT0_VOUT_Msk) ==
    (UICR_REGOUT0_VOUT_DEFAULT << UICR_REGOUT0_VOUT_Pos))
{
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}

    NRF_UICR->REGOUT0 = (NRF_UICR->REGOUT0 & ~((uint32_t)UICR_REGOUT0_VOUT_Msk)) |
                        (UICR_REGOUT0_VOUT_3V0 << UICR_REGOUT0_VOUT_Pos);

    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}

    // System reset is needed to update UICR registers.
    NVIC_SystemReset();
}
  return 0;
}

SYS_INIT(set_regulator, POST_KERNEL, 80);

Best regards,

Edvin

Best regards,

Edvin

[uli_hn]

Hello dear Edvin,

I would like to thank you once again!!! for your explanations on the use of RTT and the correct creation of conf files. I am now in perfect hands :-)

Only with my last statement you misunderstood me:

uli_hn said:

The error I have found is that flashing the dongle via the nRF52 DK works, but not via the bootloader. And this has nothing to do with my project. My project works with the dongle as long as it is flashed via the nRF52 DK.
And that shouldn't really be the case, should it?

I repeat again:

First build (my workaround):

• I build my project ( without nRF5 bootloader configuration )
• I flash this error-free built project with the nRF52 DK (and the correctly set voltage) via SWD to the dongle
• Result: everything works !!!

Second build (as specified/intended by nordic):

• I build my project ( this time with nRF5 bootloader configuration - the default setting )
• I take a brand new dongle out of the packaging, plug it in and put it into bootloader mode
• I flash this error-free built project via the generated hex file with the programmer onto the dongle
• Result: the project does not work !!! The dongle keeps restarting itself.

When I read your explanation, you think that my workaround didn't work. But that is not correct. It's the opposite. The way nordic intended is the one that doesn't work!

I wanted to draw your attention to this error.
best wishes
Uli

[Edvin]

Ok, I understand. I mixed them up. 

Can you please upload the application that replicates this precisely without any modifications? As mentioned, the previous application was waiting for some event that didn't occur, and when I bypassed it, it seemed to work in my case. 

So fi you can upload an application that will fail when programmed using the bootloader, then I can try to replicate it again.

BR,

Edvin