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nRF5340 NVS and readback_protection

mnvcsUDT

Hi Everybody,

We found little or no literature about readback_protection on the nRF5340 SOC. Our issue is that for development and debugging it is not practical to use nrfjprog -recover in order to re-flash as that completely erases the storage partition too. What is the right way to retain NVS data?

Thank you.

Regards,

Milan 

Parents
  • 0

    Hi Milan,

    You can find documentation about access port protection in the CTRL-AP - Control access port chapter in the product specification.

    If I understand you correctly, then this question is about how you handle this during development. And in that case it typically does not make sense to prevent debugging, so then you simply disable access port protection. If you program an application that has been built without ENABLE_APPROTECT defined then you should be good to go (as nrfjprog --recover will have written to UICR.APPROTECT allready, and as long as you do not do a full chip erase or write more to that register, it retains its value and debugging will continue to be enabled as long as you do not program firmware built with ENABLE_APPROTECT defined.

  • 0 in reply to Einar Thorsrud

    Almost all clear.

    Except, it is still totally unclear how this is done in practice. There are mentions of using a 32-bit key (?) for both the 

    NRF_CTRLAP_S->APPROTECT.DISABLE register and the debugger. But again this is just speculation. Can you please point me to a guide how to disable this? And re-enable in case. 
  • 0 in reply to mnvcsUDT

    That is surprising. Can you show a bit more of your code, ad least where "wdt" comes from? Is it the same if the second parameter is 1?

  • 0 in reply to Einar Thorsrud

    It is. That is why I did not think about it before. 

    Basically, 

    CONFIG_WATCHDOG=y
    The module for watchdog handling:
    LOG_MODULE_REGISTER(watchdog, LOG_LEVEL_INF);

#if DT_NODE_HAS_STATUS(DT_ALIAS(watchdog0), okay)
#elif DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_watchdog)
#define WDT_NODE DT_INST(0, nordic_nrf_watchdog)
#endif
/*
 * If the devicetree has a watchdog node, get its label property.
 */
#ifdef WDT_NODE
#define WDT_DEV_NAME DT_LABEL(WDT_NODE)
#else
#define WDT_DEV_NAME ""
#error "Unsupported SoC and no watchdog0 alias in zephyr.dts"
#endif

const struct device *wdt; /*There could only be one watchdog instance for nRF*/

static void wdt_callback(const struct device *wdt_dev, int channel_id)
{
    static bool handled_event;

    if (handled_event)
    {
        return;
    }

    wdt_feed(wdt_dev, channel_id);

    LOG_ERR("Watchdog handled things..ready to reset");
    handled_event = true;
}

void dd_wdt_init()
{

    LOG_WRN("Initialize Watchdog");

    wdt = device_get_binding(WDT_DEV_NAME);
    if (!wdt)
    {
        LOG_ERR("Cannot get WDT device");
        return;
    }
}

int dd_wdt_add_channel()
{
    int wdt_channel_id;
    struct wdt_timeout_cfg wdt_config;
    /* Reset SoC when watchdog timer expires. */
    wdt_config.flags = WDT_FLAG_RESET_SOC;
    /* Expire watchdog after 1000 milliseconds. */
    wdt_config.window.min = 0U;
    wdt_config.window.max = WATCHDOG_TIMEOUT_MS;

    /* Set up watchdog callback. Jump into it when watchdog expired. */
    wdt_config.callback = wdt_callback;

    wdt_channel_id = wdt_install_timeout(wdt, &wdt_config);
    if (wdt_channel_id == -ENOTSUP)
    {
        wdt_config.callback = NULL;
        wdt_channel_id = wdt_install_timeout(wdt, &wdt_config);
    }
    if (wdt_channel_id < 0)
    {
        LOG_ERR("Watchdog channel install error");
        return -1;
    }
    LOG_WRN("Watchdog added to channel %i", wdt_channel_id);

    return wdt_channel_id;
}

int dd_watchdog_start()
{
    int err = wdt_setup(wdt, 0);
    if (err < 0)
    {
        LOG_ERR("Watchdog setup error");
        return err;
    }
    return err;
}

void dd_wdt_feed(int wdt_channel_id)
{
    wdt_feed(wdt, wdt_channel_id);
}
    when dd_watchdog_start() is called (just a wrapper for wdt_setup()) the write protection kicks in. The program runs without errors and watchdog resets. 
  • 0 in reply to Einar Thorsrud

    Yes, with the options parameter to be set to 1, it results in the same behaviour. 

  • 0 in reply to mnvcsUDT

    Hi,

    This is very interesting, but for some reason I have not been able to reproduce it, even while testing with WDT. Is it possible to provide a project that demonstrate this on a DK? (could be just a diff showing what you need to add to an example project to trigger the issue).

  • 0 in reply to Einar Thorsrud

    Hi, of course. I just added the watchdog to the network coordinator example for a quick test. The problem is the same.

    /*
 * Copyright (c) 2020 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

/** @file
 *  @brief Simple Zigbee network coordinator implementation
 */

#include <zephyr.h>
#include <device.h>
#include <logging/log.h>
#include <dk_buttons_and_leds.h>

#include <zboss_api.h>
#include <zb_mem_config_max.h>
#include <zigbee/zigbee_error_handler.h>
#include <zigbee/zigbee_app_utils.h>
#include <zb_nrf_platform.h>
#include <drivers/watchdog.h>

LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);

#if DT_NODE_HAS_STATUS(DT_ALIAS(watchdog0), okay)
#elif DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_watchdog)
#define WDT_NODE DT_INST(0, nordic_nrf_watchdog)
#endif
/*
 * If the devicetree has a watchdog node, get its label property.
 */
#ifdef WDT_NODE
#define WDT_DEV_NAME DT_LABEL(WDT_NODE)
#else
#define WDT_DEV_NAME ""
#error "Unsupported SoC and no watchdog0 alias in zephyr.dts"
#endif

const struct device *wdt; /*There could only be one watchdog instance for nRF*/
int wdt_channel_id;

static void wdt_callback(const struct device *wdt_dev, int channel_id)
{
	static bool handled_event;

	if (handled_event)
	{
		return;
	}

	wdt_feed(wdt_dev, channel_id);

	LOG_ERR("Watchdog handled things..ready to reset");
	handled_event = true;
}

uint8_t wdt_test()
{
	struct wdt_timeout_cfg wdt_config;
	/* Reset SoC when watchdog timer expires. */
	wdt_config.flags = WDT_FLAG_RESET_SOC;
	/* Expire watchdog after 1000 milliseconds. */
	wdt_config.window.min = 0U;
	wdt_config.window.max = 1000;

	/* Set up watchdog callback. Jump into it when watchdog expired. */
	wdt_config.callback = wdt_callback;

	LOG_WRN("Initialize Watchdog");

	wdt = device_get_binding(WDT_DEV_NAME);
	if (!wdt)
	{
		LOG_ERR("Cannot get WDT device");
		return -1;
	}

	/*Add WDT channel*/

	wdt_channel_id = wdt_install_timeout(wdt, &wdt_config);
	if (wdt_channel_id == -ENOTSUP)
	{
		wdt_config.callback = NULL;
		wdt_channel_id = wdt_install_timeout(wdt, &wdt_config);
	}
	if (wdt_channel_id < 0)
	{
		LOG_ERR("Watchdog channel install error");
		return -1;
	}
	LOG_WRN("Watchdog added to channel %i", wdt_channel_id);

	/*Start Watchdog*/

	int err = wdt_setup(wdt, 1);
	if (err < 0)
	{
		LOG_ERR("Watchdog setup error");
		return err;
	}

	return 0;
}

#define RUN_STATUS_LED DK_LED1
#define RUN_LED_BLINK_INTERVAL 1000

/* LED indicating that network is opened for new nodes */
#define ZIGBEE_NETWORK_STATE_LED DK_LED3

/* Button which reopens the Zigbee Network */
#define KEY_ZIGBEE_NETWORK_REOPEN DK_BTN1_MSK

/**
 * If set to ZB_TRUE then device will not open the network
 * after forming or reboot.
 */
#define ZIGBEE_MANUAL_STEERING ZB_FALSE

#define ZIGBEE_PERMIT_LEGACY_DEVICES ZB_FALSE

#ifndef ZB_COORDINATOR_ROLE
#error Define ZB_COORDINATOR_ROLE to compile coordinator source code.
#endif

/**@brief Callback used in order to visualise network steering period.
 *
 * @param[in]   param   Not used. Required by callback type definition.
 */
static void steering_finished(zb_uint8_t param)
{
	ARG_UNUSED(param);
	LOG_INF("Network steering finished");
	dk_set_led_off(ZIGBEE_NETWORK_STATE_LED);
}

/**@brief Callback for button events.
 *
 * @param[in]   button_state  Bitmask containing buttons state.
 * @param[in]   has_changed   Bitmask containing buttons
 *                            that has changed their state.
 */
static void button_changed(uint32_t button_state, uint32_t has_changed)
{
	/* Calculate bitmask of buttons that are pressed
	 * and have changed their state.
	 */
	uint32_t buttons = button_state & has_changed;
	zb_bool_t comm_status;

	if (buttons & KEY_ZIGBEE_NETWORK_REOPEN)
	{
		(void)(ZB_SCHEDULE_APP_ALARM_CANCEL(
			steering_finished, ZB_ALARM_ANY_PARAM));

		comm_status = bdb_start_top_level_commissioning(
			ZB_BDB_NETWORK_STEERING);
		if (comm_status)
		{
			LOG_INF("Top level comissioning restated");
		}
		else
		{
			LOG_INF("Top level comissioning hasn't finished yet!");
		}
	}
}

/**@brief Function for initializing LEDs and Buttons. */
static void configure_gpio(void)
{
	int err;

	err = dk_buttons_init(button_changed);
	if (err)
	{
		LOG_ERR("Cannot init buttons (err: %d)", err);
	}

	err = dk_leds_init();
	if (err)
	{
		LOG_ERR("Cannot init LEDs (err: %d)", err);
	}
}

/**@brief Zigbee stack event handler.
 *
 * @param[in]   bufid   Reference to the Zigbee stack buffer
 *                      used to pass signal.
 */
void zboss_signal_handler(zb_bufid_t bufid)
{
	/* Read signal description out of memory buffer. */
	zb_zdo_app_signal_hdr_t *sg_p = NULL;
	zb_zdo_app_signal_type_t sig = zb_get_app_signal(bufid, &sg_p);
	zb_ret_t status = ZB_GET_APP_SIGNAL_STATUS(bufid);
	zb_ret_t zb_err_code;
	zb_bool_t comm_status;
	zb_time_t timeout_bi;

	switch (sig)
	{
	case ZB_BDB_SIGNAL_DEVICE_REBOOT:
		/* BDB initialization completed after device reboot,
		 * use NVRAM contents during initialization.
		 * Device joined/rejoined and started.
		 */
		if (status == RET_OK)
		{
			if (ZIGBEE_MANUAL_STEERING == ZB_FALSE)
			{
				LOG_INF("Start network steering");
				comm_status = bdb_start_top_level_commissioning(
					ZB_BDB_NETWORK_STEERING);
				ZB_COMM_STATUS_CHECK(comm_status);
			}
			else
			{
				LOG_INF("Coordinator restarted successfully");
			}
		}
		else
		{
			LOG_ERR("Failed to initialize Zigbee stack using NVRAM data (status: %d)",
					status);
		}
		break;

	case ZB_BDB_SIGNAL_STEERING:
		if (status == RET_OK)
		{
			if (ZIGBEE_PERMIT_LEGACY_DEVICES == ZB_TRUE)
			{
				LOG_INF("Allow pre-Zigbee 3.0 devices to join the network");
				zb_bdb_set_legacy_device_support(1);
			}

			/* Schedule an alarm to notify about the end
			 * of steering period
			 */
			LOG_INF("Network steering started");
			zb_err_code = ZB_SCHEDULE_APP_ALARM(
				steering_finished, 0,
				ZB_TIME_ONE_SECOND *
					ZB_ZGP_DEFAULT_COMMISSIONING_WINDOW);
			ZB_ERROR_CHECK(zb_err_code);
		}
		break;

	case ZB_ZDO_SIGNAL_DEVICE_ANNCE:
	{
		zb_zdo_signal_device_annce_params_t *dev_annce_params =
			ZB_ZDO_SIGNAL_GET_PARAMS(
				sg_p, zb_zdo_signal_device_annce_params_t);

		LOG_INF("New device commissioned or rejoined (short: 0x%04hx)",
				dev_annce_params->device_short_addr);

		zb_err_code = ZB_SCHEDULE_APP_ALARM_CANCEL(steering_finished,
												   ZB_ALARM_ANY_PARAM);
		if (zb_err_code == RET_OK)
		{
			LOG_INF("Joining period extended.");
			zb_err_code = ZB_SCHEDULE_APP_ALARM(
				steering_finished, 0,
				ZB_TIME_ONE_SECOND *
					ZB_ZGP_DEFAULT_COMMISSIONING_WINDOW);
			ZB_ERROR_CHECK(zb_err_code);
		}
	}
	break;

	default:
		/* Call default signal handler. */
		ZB_ERROR_CHECK(zigbee_default_signal_handler(bufid));
		break;
	}

	/* Update network status LED */
	if (ZB_JOINED() &&
		(ZB_SCHEDULE_GET_ALARM_TIME(steering_finished, ZB_ALARM_ANY_PARAM,
									&timeout_bi) == RET_OK))
	{
		dk_set_led_on(ZIGBEE_NETWORK_STATE_LED);
	}
	else
	{
		dk_set_led_off(ZIGBEE_NETWORK_STATE_LED);
	}

	/*
	 * All callbacks should either reuse or free passed buffers.
	 * If bufid == 0, the buffer is invalid (not passed).
	 */
	if (bufid)
	{
		zb_buf_free(bufid);
	}
}

void error(void)
{
	dk_set_leds_state(DK_ALL_LEDS_MSK, DK_NO_LEDS_MSK);

	while (true)
	{
		/* Spin for ever */
		k_sleep(K_MSEC(1000));
	}
}

void main(void)
{
	int blink_status = 0;

	LOG_INF("Starting ZBOSS Coordinator example");

	/* Initialize */
	configure_gpio();

	/* Start Zigbee default thread */
	zigbee_enable();

	wdt_test();

	LOG_INF("ZBOSS Coordinator example started");

	while (1)
	{
		dk_set_led(RUN_STATUS_LED, (++blink_status) % 2);
		k_sleep(K_MSEC(RUN_LED_BLINK_INTERVAL));
		wdt_feed(wdt, wdt_channel_id);
	}
}


    #
# Copyright (c) 2020 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_WATCHDOG=y
CONFIG_SERIAL=y
CONFIG_GPIO=y

# Make sure printk is not printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048
CONFIG_MAIN_THREAD_PRIORITY=7
CONFIG_MAIN_STACK_SIZE=2048

CONFIG_ZIGBEE=y
CONFIG_ZIGBEE_APP_UTILS=y
CONFIG_ZIGBEE_ROLE_COORDINATOR=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Use software cryptography on nRF5340
CONFIG_TINYCRYPT=y
CONFIG_CTR_DRBG_CSPRNG_GENERATOR=y
CONFIG_ZIGBEE_USE_SOFTWARE_AES=y

#Networking
CONFIG_MPSL=n
CONFIG_NET_IPV6_MLD=n
CONFIG_NET_IPV6_NBR_CACHE=n
CONFIG_NET_IPV6_RA_RDNSS=n
CONFIG_NET_IP_ADDR_CHECK=n
CONFIG_NET_UDP=n

Reply
  • 0 in reply to Einar Thorsrud

    Hi, of course. I just added the watchdog to the network coordinator example for a quick test. The problem is the same.

    /*
 * Copyright (c) 2020 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

/** @file
 *  @brief Simple Zigbee network coordinator implementation
 */

#include <zephyr.h>
#include <device.h>
#include <logging/log.h>
#include <dk_buttons_and_leds.h>

#include <zboss_api.h>
#include <zb_mem_config_max.h>
#include <zigbee/zigbee_error_handler.h>
#include <zigbee/zigbee_app_utils.h>
#include <zb_nrf_platform.h>
#include <drivers/watchdog.h>

LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);

#if DT_NODE_HAS_STATUS(DT_ALIAS(watchdog0), okay)
#elif DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_watchdog)
#define WDT_NODE DT_INST(0, nordic_nrf_watchdog)
#endif
/*
 * If the devicetree has a watchdog node, get its label property.
 */
#ifdef WDT_NODE
#define WDT_DEV_NAME DT_LABEL(WDT_NODE)
#else
#define WDT_DEV_NAME ""
#error "Unsupported SoC and no watchdog0 alias in zephyr.dts"
#endif

const struct device *wdt; /*There could only be one watchdog instance for nRF*/
int wdt_channel_id;

static void wdt_callback(const struct device *wdt_dev, int channel_id)
{
	static bool handled_event;

	if (handled_event)
	{
		return;
	}

	wdt_feed(wdt_dev, channel_id);

	LOG_ERR("Watchdog handled things..ready to reset");
	handled_event = true;
}

uint8_t wdt_test()
{
	struct wdt_timeout_cfg wdt_config;
	/* Reset SoC when watchdog timer expires. */
	wdt_config.flags = WDT_FLAG_RESET_SOC;
	/* Expire watchdog after 1000 milliseconds. */
	wdt_config.window.min = 0U;
	wdt_config.window.max = 1000;

	/* Set up watchdog callback. Jump into it when watchdog expired. */
	wdt_config.callback = wdt_callback;

	LOG_WRN("Initialize Watchdog");

	wdt = device_get_binding(WDT_DEV_NAME);
	if (!wdt)
	{
		LOG_ERR("Cannot get WDT device");
		return -1;
	}

	/*Add WDT channel*/

	wdt_channel_id = wdt_install_timeout(wdt, &wdt_config);
	if (wdt_channel_id == -ENOTSUP)
	{
		wdt_config.callback = NULL;
		wdt_channel_id = wdt_install_timeout(wdt, &wdt_config);
	}
	if (wdt_channel_id < 0)
	{
		LOG_ERR("Watchdog channel install error");
		return -1;
	}
	LOG_WRN("Watchdog added to channel %i", wdt_channel_id);

	/*Start Watchdog*/

	int err = wdt_setup(wdt, 1);
	if (err < 0)
	{
		LOG_ERR("Watchdog setup error");
		return err;
	}

	return 0;
}

#define RUN_STATUS_LED DK_LED1
#define RUN_LED_BLINK_INTERVAL 1000

/* LED indicating that network is opened for new nodes */
#define ZIGBEE_NETWORK_STATE_LED DK_LED3

/* Button which reopens the Zigbee Network */
#define KEY_ZIGBEE_NETWORK_REOPEN DK_BTN1_MSK

/**
 * If set to ZB_TRUE then device will not open the network
 * after forming or reboot.
 */
#define ZIGBEE_MANUAL_STEERING ZB_FALSE

#define ZIGBEE_PERMIT_LEGACY_DEVICES ZB_FALSE

#ifndef ZB_COORDINATOR_ROLE
#error Define ZB_COORDINATOR_ROLE to compile coordinator source code.
#endif

/**@brief Callback used in order to visualise network steering period.
 *
 * @param[in]   param   Not used. Required by callback type definition.
 */
static void steering_finished(zb_uint8_t param)
{
	ARG_UNUSED(param);
	LOG_INF("Network steering finished");
	dk_set_led_off(ZIGBEE_NETWORK_STATE_LED);
}

/**@brief Callback for button events.
 *
 * @param[in]   button_state  Bitmask containing buttons state.
 * @param[in]   has_changed   Bitmask containing buttons
 *                            that has changed their state.
 */
static void button_changed(uint32_t button_state, uint32_t has_changed)
{
	/* Calculate bitmask of buttons that are pressed
	 * and have changed their state.
	 */
	uint32_t buttons = button_state & has_changed;
	zb_bool_t comm_status;

	if (buttons & KEY_ZIGBEE_NETWORK_REOPEN)
	{
		(void)(ZB_SCHEDULE_APP_ALARM_CANCEL(
			steering_finished, ZB_ALARM_ANY_PARAM));

		comm_status = bdb_start_top_level_commissioning(
			ZB_BDB_NETWORK_STEERING);
		if (comm_status)
		{
			LOG_INF("Top level comissioning restated");
		}
		else
		{
			LOG_INF("Top level comissioning hasn't finished yet!");
		}
	}
}

/**@brief Function for initializing LEDs and Buttons. */
static void configure_gpio(void)
{
	int err;

	err = dk_buttons_init(button_changed);
	if (err)
	{
		LOG_ERR("Cannot init buttons (err: %d)", err);
	}

	err = dk_leds_init();
	if (err)
	{
		LOG_ERR("Cannot init LEDs (err: %d)", err);
	}
}

/**@brief Zigbee stack event handler.
 *
 * @param[in]   bufid   Reference to the Zigbee stack buffer
 *                      used to pass signal.
 */
void zboss_signal_handler(zb_bufid_t bufid)
{
	/* Read signal description out of memory buffer. */
	zb_zdo_app_signal_hdr_t *sg_p = NULL;
	zb_zdo_app_signal_type_t sig = zb_get_app_signal(bufid, &sg_p);
	zb_ret_t status = ZB_GET_APP_SIGNAL_STATUS(bufid);
	zb_ret_t zb_err_code;
	zb_bool_t comm_status;
	zb_time_t timeout_bi;

	switch (sig)
	{
	case ZB_BDB_SIGNAL_DEVICE_REBOOT:
		/* BDB initialization completed after device reboot,
		 * use NVRAM contents during initialization.
		 * Device joined/rejoined and started.
		 */
		if (status == RET_OK)
		{
			if (ZIGBEE_MANUAL_STEERING == ZB_FALSE)
			{
				LOG_INF("Start network steering");
				comm_status = bdb_start_top_level_commissioning(
					ZB_BDB_NETWORK_STEERING);
				ZB_COMM_STATUS_CHECK(comm_status);
			}
			else
			{
				LOG_INF("Coordinator restarted successfully");
			}
		}
		else
		{
			LOG_ERR("Failed to initialize Zigbee stack using NVRAM data (status: %d)",
					status);
		}
		break;

	case ZB_BDB_SIGNAL_STEERING:
		if (status == RET_OK)
		{
			if (ZIGBEE_PERMIT_LEGACY_DEVICES == ZB_TRUE)
			{
				LOG_INF("Allow pre-Zigbee 3.0 devices to join the network");
				zb_bdb_set_legacy_device_support(1);
			}

			/* Schedule an alarm to notify about the end
			 * of steering period
			 */
			LOG_INF("Network steering started");
			zb_err_code = ZB_SCHEDULE_APP_ALARM(
				steering_finished, 0,
				ZB_TIME_ONE_SECOND *
					ZB_ZGP_DEFAULT_COMMISSIONING_WINDOW);
			ZB_ERROR_CHECK(zb_err_code);
		}
		break;

	case ZB_ZDO_SIGNAL_DEVICE_ANNCE:
	{
		zb_zdo_signal_device_annce_params_t *dev_annce_params =
			ZB_ZDO_SIGNAL_GET_PARAMS(
				sg_p, zb_zdo_signal_device_annce_params_t);

		LOG_INF("New device commissioned or rejoined (short: 0x%04hx)",
				dev_annce_params->device_short_addr);

		zb_err_code = ZB_SCHEDULE_APP_ALARM_CANCEL(steering_finished,
												   ZB_ALARM_ANY_PARAM);
		if (zb_err_code == RET_OK)
		{
			LOG_INF("Joining period extended.");
			zb_err_code = ZB_SCHEDULE_APP_ALARM(
				steering_finished, 0,
				ZB_TIME_ONE_SECOND *
					ZB_ZGP_DEFAULT_COMMISSIONING_WINDOW);
			ZB_ERROR_CHECK(zb_err_code);
		}
	}
	break;

	default:
		/* Call default signal handler. */
		ZB_ERROR_CHECK(zigbee_default_signal_handler(bufid));
		break;
	}

	/* Update network status LED */
	if (ZB_JOINED() &&
		(ZB_SCHEDULE_GET_ALARM_TIME(steering_finished, ZB_ALARM_ANY_PARAM,
									&timeout_bi) == RET_OK))
	{
		dk_set_led_on(ZIGBEE_NETWORK_STATE_LED);
	}
	else
	{
		dk_set_led_off(ZIGBEE_NETWORK_STATE_LED);
	}

	/*
	 * All callbacks should either reuse or free passed buffers.
	 * If bufid == 0, the buffer is invalid (not passed).
	 */
	if (bufid)
	{
		zb_buf_free(bufid);
	}
}

void error(void)
{
	dk_set_leds_state(DK_ALL_LEDS_MSK, DK_NO_LEDS_MSK);

	while (true)
	{
		/* Spin for ever */
		k_sleep(K_MSEC(1000));
	}
}

void main(void)
{
	int blink_status = 0;

	LOG_INF("Starting ZBOSS Coordinator example");

	/* Initialize */
	configure_gpio();

	/* Start Zigbee default thread */
	zigbee_enable();

	wdt_test();

	LOG_INF("ZBOSS Coordinator example started");

	while (1)
	{
		dk_set_led(RUN_STATUS_LED, (++blink_status) % 2);
		k_sleep(K_MSEC(RUN_LED_BLINK_INTERVAL));
		wdt_feed(wdt, wdt_channel_id);
	}
}


    #
# Copyright (c) 2020 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_WATCHDOG=y
CONFIG_SERIAL=y
CONFIG_GPIO=y

# Make sure printk is not printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048
CONFIG_MAIN_THREAD_PRIORITY=7
CONFIG_MAIN_STACK_SIZE=2048

CONFIG_ZIGBEE=y
CONFIG_ZIGBEE_APP_UTILS=y
CONFIG_ZIGBEE_ROLE_COORDINATOR=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Use software cryptography on nRF5340
CONFIG_TINYCRYPT=y
CONFIG_CTR_DRBG_CSPRNG_GENERATOR=y
CONFIG_ZIGBEE_USE_SOFTWARE_AES=y

#Networking
CONFIG_MPSL=n
CONFIG_NET_IPV6_MLD=n
CONFIG_NET_IPV6_NBR_CACHE=n
CONFIG_NET_IPV6_RA_RDNSS=n
CONFIG_NET_IP_ADDR_CHECK=n
CONFIG_NET_UDP=n

Children
  • 0 in reply to mnvcsUDT

    Hello,

    I tested now with nRF Connect SDK 1.7.0 and your changes to the network_coordinator sample. I tested building for both nrf5340dk_nrf5340_cpuapp_ns and nrf5340dk_nrf5340_cpuapp, but in both cases I was able to program repeatedly using west flash.

    This is a bit of a mystery. Can you write how you build the application? And the DK version you are reproducing this on? Any other information that could help me reproduce would also be useful.

  • 0 in reply to Einar Thorsrud

    Okay. This is indeed a mistery now.

    I attached the build log. The DK version is 0.11.0. The nrf SDK is at 1.7.0. Zephyr is 2.6.99-ncs1

    ..@.. network_coordinator % west build -b nrf5340dk_nrf5340_cpuapp
-- west build: generating a build system
Including boilerplate (Zephyr base (cached)):  /../../zephyr/cmake/app/boilerplate.cmake
-- Application:  /../../network_coordinator
-- Zephyr version: 2.6.99 ( /../../zephyr), build: v2.6.99-ncs1
-- Found west (found suitable version "0.11.1", minimum required is "0.7.1")
-- Board: nrf5340dk_nrf5340_cpuapp
-- Cache files will be written to:  /../Library/Caches/zephyr
-- Found dtc: /usr/local/bin/dtc (found suitable version "1.6.0", minimum required is "1.4.6")
-- Found toolchain: gnuarmemb (/usr/local/gcc_arm/gcc-arm-none-eabi-10-2020-q4-major)
-- Found BOARD.dts:  /../../zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpuapp.dts
-- Generated zephyr.dts:  /../../network_coordinator/build/zephyr/zephyr.dts
-- Generated devicetree_unfixed.h:  /../../network_coordinator/build/zephyr/include/generated/devicetree_unfixed.h
-- Generated device_extern.h:  /../../network_coordinator/build/zephyr/include/generated/device_extern.h
-- Including generated dts.cmake file:  /../../network_coordinator/build/zephyr/dts.cmake
Parsing  /../../zephyr/Kconfig
Loaded configuration ' /../../zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpuapp_defconfig'
Merged configuration ' /../../network_coordinator/prj_nrf5340dk_nrf5340_cpuapp.conf'
Configuration saved to ' /../../network_coordinator/build/zephyr/.config'
Kconfig header saved to ' /../../network_coordinator/build/zephyr/include/generated/autoconf.h'
-- The C compiler identification is GNU 10.2.1
-- The CXX compiler identification is GNU 10.2.1
-- The ASM compiler identification is GNU
-- Found assembler: /usr/local/gcc_arm/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-gcc
Adding '802154_rpmsg' firmware as child image since CONFIG_NRF_802154_SER_HOST is set to y

=== child image 802154_rpmsg - CPUNET begin ===
Including boilerplate (Zephyr base):  /../../zephyr/cmake/app/boilerplate.cmake
-- Application:  /../../zephyr/samples/boards/nrf/ieee802154/802154_rpmsg
-- Zephyr version: 2.6.99 ( /../../zephyr), build: v2.6.99-ncs1
-- Found Python3: /usr/local/bin/python3.9 (found suitable exact version "3.9.7") found components: Interpreter 
-- Found west (found suitable version "0.11.1", minimum required is "0.7.1")
-- Board: nrf5340dk_nrf5340_cpunet
-- Cache files will be written to:  /../Library/Caches/zephyr
-- Found dtc: /usr/local/bin/dtc (found suitable version "1.6.0", minimum required is "1.4.6")
-- Found toolchain: gnuarmemb (/usr/local/gcc_arm/gcc-arm-none-eabi-10-2020-q4-major)
-- Found BOARD.dts:  /../../zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpunet.dts
-- Generated zephyr.dts:  /../../network_coordinator/build/802154_rpmsg/zephyr/zephyr.dts
-- Generated devicetree_unfixed.h:  /../../network_coordinator/build/802154_rpmsg/zephyr/include/generated/devicetree_unfixed.h
-- Generated device_extern.h:  /../../network_coordinator/build/802154_rpmsg/zephyr/include/generated/device_extern.h
-- Including generated dts.cmake file:  /../../network_coordinator/build/802154_rpmsg/zephyr/dts.cmake
Parsing  /../../zephyr/Kconfig
Loaded configuration ' /../../zephyr/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpunet_defconfig'
Merged configuration ' /../../zephyr/samples/boards/nrf/ieee802154/802154_rpmsg/prj.conf'
Merged configuration ' /../../nrf/subsys/partition_manager/partition_manager_enabled.conf'
Configuration saved to ' /../../network_coordinator/build/802154_rpmsg/zephyr/.config'
Kconfig header saved to ' /../../network_coordinator/build/802154_rpmsg/zephyr/include/generated/autoconf.h'
-- The C compiler identification is GNU 10.2.1
-- The CXX compiler identification is GNU 10.2.1
-- The ASM compiler identification is GNU
-- Found assembler: /usr/local/gcc_arm/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-gcc
-- libmetal version: 1.0.0 ( /../../zephyr/samples/boards/nrf/ieee802154/802154_rpmsg)
-- Build type:  
-- Host:    Darwin/x86_64
-- Target:  Generic/arm
-- Machine: cortexm
-- Looking for include file stdatomic.h
-- Looking for include file stdatomic.h - found
-- open-amp version: 1.0.0 ( /../../modules/lib/open-amp/open-amp)
-- Host:    Darwin/x86_64
-- Target:  Generic/arm
-- Machine: cortexm
-- C_FLAGS :  -Wall -Wextra
-- Looking for include file fcntl.h
-- Looking for include file fcntl.h - found
-- Configuring done
-- Generating done
-- Build files have been written to:  /../../network_coordinator/build/802154_rpmsg
=== child image 802154_rpmsg - CPUNET end ===

-- libmetal version: 1.0.0 ( /../../network_coordinator)
-- Build type:  
-- Host:    Darwin/x86_64
-- Target:  Generic/arm
-- Machine: cortexm
-- Looking for include file stdatomic.h
-- Looking for include file stdatomic.h - found
-- open-amp version: 1.0.0 ( /../../modules/lib/open-amp/open-amp)
-- Host:    Darwin/x86_64
-- Target:  Generic/arm
-- Machine: cortexm
-- C_FLAGS :  -Wall -Wextra
-- Looking for include file fcntl.h
-- Looking for include file fcntl.h - found
CMake Warning at  /../../nrfxlib/nrf_802154/sl/sl/CMakeLists.txt:14 (message):
  This combination of SoC and floating point ABI is not supported by the
  nrf_802154_sl
  lib.( /../../nrfxlib/nrf_802154/sl/sl/lib/nRF5340_CPUAPP/hard-float
  doesn't exist.)


CMake Warning at  /../../zephyr/CMakeLists.txt:1612 (message):
  __ASSERT() statements are globally ENABLED


-- Configuring done
-- Generating done
-- Build files have been written to:  /../../network_coordinator/build
-- west build: building application
[1/330] Preparing syscall dependency handling

[7/330] Performing build step for '802154_rpmsg_subimage'
[1/248] Preparing syscall dependency handling

[239/248] Linking C executable zephyr/zephyr_prebuilt.elf

[246/248] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       67996 B       256 KB     25.94%
            SRAM:       26856 B        64 KB     40.98%
           SRAM1:          0 GB        64 KB      0.00%
        IDT_LIST:          0 GB         2 KB      0.00%
[248/248] Generating zephyr/merged_CPUNET.hex
[318/330] Linking C executable zephyr/zephyr_prebuilt.elf

[328/330] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:      298692 B       976 KB     29.89%
            SRAM:       69688 B       512 KB     13.29%
        IDT_LIST:          0 GB         2 KB      0.00%
[330/330] Generating zephyr/merged_domains.hex
..@.. network_coordinator %

  • 0 in reply to mnvcsUDT

    Hi,

    I'm struggling the same issue and whole day I spent today to understand, why I was not able to attach to RTT. Turned out, that simply flash is cleared during attaching to RTT service Slight smile, what can be found below. In my case device is locked every time after flashing and off/on sequence. It happens on custom board based on NRF52832 and what is more interesting, I cannot reproduce it on NRF52DK with exactly the same hex file and steps.
    I found this topic because I was looking for CONFIG_NRF_SECURE_APPROTECT_LOCK.
    This is hello_world app, so no sophisticated features, watchdogs, etc.
    So far I have found, that loading image to RAM using debugger and then attaching to RTT can be a workaround in this case.

    Steps:

    Custom board NRF52832:


jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ west build -b nrf52dk_nrf52832
-- west build: generating a build system
Including boilerplate (Zephyr base): /home/jacek/projects/ncs/zephyr/cmake/app/boilerplate.cmake
-- Application: /home/jacek/projects/ncs/zephyr/samples/hello_world
-- Zephyr version: 2.6.99 (/home/jacek/projects/ncs/zephyr), build: v2.6.99-ncs1
-- Found Python3: /usr/bin/python3.8 (found suitable exact version "3.8.10") found components: Interpreter 
-- Found west (found suitable version "0.11.1", minimum required is "0.7.1")
-- Board: nrf52dk_nrf52832
-- Cache files will be written to: /home/jacek/.cache/zephyr
-- ZEPHYR_TOOLCHAIN_VARIANT not set, trying to locate Zephyr SDK
-- Using toolchain: zephyr 0.12.4 (/opt/zephyr-sdk)
-- Found dtc: /opt/zephyr-sdk/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.5.0", minimum required is "1.4.6")
-- Found BOARD.dts: /home/jacek/projects/ncs/zephyr/boards/arm/nrf52dk_nrf52832/nrf52dk_nrf52832.dts
-- Generated zephyr.dts: /home/jacek/projects/ncs/zephyr/samples/hello_world/build/zephyr/zephyr.dts
-- Generated devicetree_unfixed.h: /home/jacek/projects/ncs/zephyr/samples/hello_world/build/zephyr/include/generated/devicetree_unfixed.h
-- Generated device_extern.h: /home/jacek/projects/ncs/zephyr/samples/hello_world/build/zephyr/include/generated/device_extern.h
-- Including generated dts.cmake file: /home/jacek/projects/ncs/zephyr/samples/hello_world/build/zephyr/dts.cmake
Parsing /home/jacek/projects/ncs/zephyr/Kconfig
Loaded configuration '/home/jacek/projects/ncs/zephyr/boards/arm/nrf52dk_nrf52832/nrf52dk_nrf52832_defconfig'
Merged configuration '/home/jacek/projects/ncs/zephyr/samples/hello_world/prj.conf'
Configuration saved to '/home/jacek/projects/ncs/zephyr/samples/hello_world/build/zephyr/.config'
Kconfig header saved to '/home/jacek/projects/ncs/zephyr/samples/hello_world/build/zephyr/include/generated/autoconf.h'
-- The C compiler identification is GNU 10.2.0
-- The CXX compiler identification is GNU 10.2.0
-- The ASM compiler identification is GNU
-- Found assembler: /opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jacek/projects/ncs/zephyr/samples/hello_world/build
-- west build: building application
[1/148] Preparing syscall dependency handling

[141/148] Linking C executable zephyr/zephyr_prebuilt.elf

[148/148] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       16588 B       512 KB      3.16%
            SRAM:        5376 B        64 KB      8.20%
        IDT_LIST:          0 GB         2 KB      0.00%
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ nrfjprog -f nrf52 --program build/zephyr/zephyr.hex --sectorerase
ERROR: The operation attempted is unavailable due to readback protection in
ERROR: your device. Please use --recover to unlock the device.
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ nrfjprog --recover
Recovering device. This operation might take 30s.
Writing image to disable ap protect.
Erasing user code and UICR flash areas.
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ nrfjprog -f nrf52 --reset
Applying system reset.
Run.
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ /opt/SEGGER/JLink/JLinkExe -device NRF52832_xxAA -if swd -speed auto -AutoConnect 1 -RTTTelnetPort 36601
SEGGER J-Link Commander V7.56a (Compiled Oct 11 2021 16:31:53)
DLL version V7.56a, compiled Oct 11 2021 16:31:37

RTT Telnet Port set to 36601
Connecting to J-Link via USB...O.K.
Firmware: J-Link Pro V4 compiled Sep 24 2021 16:41:59
Hardware version: V4.00
S/N: 174402102
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
IP-Addr: DHCP (no addr. received yet)
VTref=3.125V
Device "NRF52832_XXAA" selected.


Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
[0][0]: E000E000 CID B105E00D PID 000BB00C SCS-M7
[0][1]: E0001000 CID B105E00D PID 003BB002 DWT
[0][2]: E0002000 CID B105E00D PID 002BB003 FPB
[0][3]: E0000000 CID B105E00D PID 003BB001 ITM
[0][4]: E0040000 CID B105900D PID 000BB9A1 TPIU
[0][5]: E0041000 CID B105900D PID 000BB925 ETM
Cortex-M4 identified.
J-Link>q
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ # power supply off/on sequence
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ /opt/SEGGER/JLink/JLinkExe -device NRF52832_xxAA -if swd -speed auto -AutoConnect 1 -RTTTelnetPort 36601
SEGGER J-Link Commander V7.56a (Compiled Oct 11 2021 16:31:53)
DLL version V7.56a, compiled Oct 11 2021 16:31:37

RTT Telnet Port set to 36601
Connecting to J-Link via USB...O.K.
Firmware: J-Link Pro V4 compiled Sep 24 2021 16:41:59
Hardware version: V4.00
S/N: 174402102
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
IP-Addr: DHCP (no addr. received yet)
VTref=3.127V
Device "NRF52832_XXAA" selected.


Connecting to target via SWD
InitTarget() start
CTRL-AP indicates that the device is secured.
For debugger connection the device needs to be unsecured.
Note: Unsecuring will trigger a mass erase of the internal flash.

Executing default behavior previously saved in the registry.
Device will be unsecured now.
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
[0][0]: E000E000 CID B105E00D PID 000BB00C SCS-M7
[0][1]: E0001000 CID B105E00D PID 003BB002 DWT
[0][2]: E0002000 CID B105E00D PID 002BB003 FPB
[0][3]: E0000000 CID B105E00D PID 003BB001 ITM
[0][4]: E0040000 CID B105900D PID 000BB9A1 TPIU
[0][5]: E0041000 CID B105900D PID 000BB925 ETM
Cortex-M4 identified.
J-Link>q
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$

    NRF52DK:

jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ nrfjprog -f nrf52 --program build/zephyr/zephyr.hex --sectorerase
Parsing image file.
Erasing page at address 0x0.
Erasing page at address 0x1000.
Erasing page at address 0x2000.
Erasing page at address 0x3000.
Erasing page at address 0x4000.
Applying system reset.
Checking that the area to write is not protected.
Programming device.
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ nrfjprog -f nrf52 --reset
Applying system reset.
Run.
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ /opt/SEGGER/JLink/JLinkExe -device NRF52832_xxAA -if swd -speed auto -AutoConnect 1 -RTTTelnetPort 36601
SEGGER J-Link Commander V7.56a (Compiled Oct 11 2021 16:31:53)
DLL version V7.56a, compiled Oct 11 2021 16:31:37

RTT Telnet Port set to 36601
Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Feb  2 2021 16:47:20
Hardware version: V1.00
S/N: 682192662
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
VTref=3.300V
Device "NRF52832_XXAA" selected.


Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
[0][0]: E000E000 CID B105E00D PID 000BB00C SCS-M7
[0][1]: E0001000 CID B105E00D PID 003BB002 DWT
[0][2]: E0002000 CID B105E00D PID 002BB003 FPB
[0][3]: E0000000 CID B105E00D PID 003BB001 ITM
[0][4]: E0040000 CID B105900D PID 000BB9A1 TPIU
[0][5]: E0041000 CID B105900D PID 000BB925 ETM
Cortex-M4 identified.
J-Link>q
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ # power supply off/on sequence
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$ /opt/SEGGER/JLink/JLinkExe -device NRF52832_xxAA -if swd -speed auto -AutoConnect 1 -RTTTelnetPort 36601
SEGGER J-Link Commander V7.56a (Compiled Oct 11 2021 16:31:53)
DLL version V7.56a, compiled Oct 11 2021 16:31:37

RTT Telnet Port set to 36601
Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Feb  2 2021 16:47:20
Hardware version: V1.00
S/N: 682192662
License(s): RDI, FlashBP, FlashDL, JFlash, GDB
VTref=3.300V
Device "NRF52832_XXAA" selected.


Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
DPIDR: 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
[0][0]: E000E000 CID B105E00D PID 000BB00C SCS-M7
[0][1]: E0001000 CID B105E00D PID 003BB002 DWT
[0][2]: E0002000 CID B105E00D PID 002BB003 FPB
[0][3]: E0000000 CID B105E00D PID 003BB001 ITM
[0][4]: E0040000 CID B105900D PID 000BB9A1 TPIU
[0][5]: E0041000 CID B105900D PID 000BB925 ETM
Cortex-M4 identified.
J-Link>q
jacek@zbook:~/projects/ncs/zephyr/samples/hello_world$

    Best regards,
    Jacek

  • 0 in reply to j4cekc1dz

    I understand you are seeing issues related to the improve AP protect mechanism on the latest revisions of the nRF52 series devices, but it is not clear that it is the same issue as discussed in this thread. Please open a new question for for the issue you are seeing instead of discussing it in this thread.

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