nrf52840 soft reset cause

RE: nrf52840 soft reset cause

simoiamma — Thu, 15 Feb 2024 17:06:30 GMT

So, I really don't know what could be the problem. I'm having the same issue with the LFXO crystal. Some boards works and other don't. If I can get them to work I'll let you know.

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 15:10:35 GMT

not exatly

buy it is done in PCBWAY

RE: nrf52840 soft reset cause

simoiamma — Thu, 15 Feb 2024 13:25:16 GMT

Do you know the process and at which temperature the board was soldered? Has the board been washed using ultrasonic cleaner?

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 11:39:47 GMT

i tested another PCB (of this circuit) but does not work

if crystal is soldered incorrect orientation it should work because XC1 or XC2 is same to each other for rotate.

RE: nrf52840 soft reset cause

simoiamma — Thu, 15 Feb 2024 11:23:19 GMT

I'm not an hardware designer expert, but I don't see obvious error like too long or overlapping traces. Maybe the crystal is broken or soldered badly or with incorrect orientation, do you have the option of replacing it?

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 09:29:11 GMT

RE: nrf52840 soft reset cause

simoiamma — Thu, 15 Feb 2024 08:51:07 GMT

I think it may be better to have an image of the routing of the traces of the 32MHz crystal than the schematic.

I'm also having issue with external crystals, one possible cause could be too much heat transfer when soldering the crystal component.

Simone

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 08:44:16 GMT

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 08:43:30 GMT

...

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 08:43:06 GMT

this is our circuit

what is your idea about shematic?

RE: nrf52840 soft reset cause

Susheel Nuguru — Thu, 15 Feb 2024 08:05:02 GMT

It means that you external oscillator is not starting or giving a stable clock. Yes, sounds more like a hardware related issue with the external clock or the connections to it.

RE: nrf52840 soft reset cause

katrindqaws — Thu, 15 Feb 2024 06:42:39 GMT

i add this but the code is Being stuck in while loop

it means the NRF_CLOCK->EVENTS_HFCLKSTARTED is zero

what is the problem?

hardware side?

RE: nrf52840 soft reset cause

simoiamma — Wed, 14 Feb 2024 14:19:15 GMT

You need to start the HFCLK somewhere before calling bt_enable(), with the code provided in the question I've linked in my previous answer, that is:

	NRF_TIMER1->BITMODE = TIMER_BITMODE_BITMODE_32Bit << TIMER_BITMODE_BITMODE_Pos;
	NRF_TIMER1->TASKS_CLEAR = 1;
	NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
	NRF_TIMER1->TASKS_START = 1;
	NRF_CLOCK->TASKS_HFCLKSTART = 1;
	while(NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
	NRF_TIMER1->TASKS_CAPTURE[0] = 1;

	printk("HF Clock has started. Startup time: %d uS\n", NRF_TIMER1->CC[0]);

Simone

RE: nrf52840 soft reset cause

katrindqaws — Mon, 12 Feb 2024 15:57:50 GMT

/*
* Copyright (c) 2018 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
*/

#include <zephyr/types.h>
#include <stddef.h>
#include <string.h>
#include <errno.h>
#include <zephyr/sys/printk.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>
#include <soc.h>

#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/bluetooth/hci.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/bluetooth/uuid.h>
#include <zephyr/bluetooth/gatt.h>

#include <bluetooth/services/lbs.h>

#include <zephyr/settings/settings.h>

#include <dk_buttons_and_leds.h>
#include <helpers/nrfx_reset_reason.h>
#define DEVICE_NAME             CONFIG_BT_DEVICE_NAME
#define DEVICE_NAME_LEN         (sizeof(DEVICE_NAME) - 1)

#define RUN_STATUS_LED          DK_LED1
#define CON_STATUS_LED          DK_LED2
#define RUN_LED_BLINK_INTERVAL 1000

#define USER_LED                DK_LED3

#define USER_BUTTON             DK_BTN1_MSK

static bool app_button_state;
uint32_t reason;

static const struct bt_data ad[] = {
   BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
   BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN),
};

static const struct bt_data sd[] = {
   BT_DATA_BYTES(BT_DATA_UUID128_ALL, BT_UUID_LBS_VAL),
};

static void connected(struct bt_conn *conn, uint8_t err)
{
   if (err) {
       printk("Connection failed (err %u)\n", err);
       return;
   }

   printk("Connected\n");

   dk_set_led_on(CON_STATUS_LED);
}

static void disconnected(struct bt_conn *conn, uint8_t reason)
{
   printk("Disconnected (reason %u)\n", reason);

   dk_set_led_off(CON_STATUS_LED);
}

#ifdef CONFIG_BT_LBS_SECURITY_ENABLED
static void security_changed(struct bt_conn *conn, bt_security_t level,
                 enum bt_security_err err)
{
   char addr[BT_ADDR_LE_STR_LEN];

   bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

   if (!err) {
       printk("Security changed: %s level %u\n", addr, level);
   } else {
       printk("Security failed: %s level %u err %d\n", addr, level,
           err);
   }
}
#endif

BT_CONN_CB_DEFINE(conn_callbacks) = {
   .connected        = connected,
   .disconnected     = disconnected,
#ifdef CONFIG_BT_LBS_SECURITY_ENABLED
   .security_changed = security_changed,
#endif
};

#if defined(CONFIG_BT_LBS_SECURITY_ENABLED)
static void auth_passkey_display(struct bt_conn *conn, unsigned int passkey)
{
   char addr[BT_ADDR_LE_STR_LEN];

   bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

   printk("Passkey for %s: %06u\n", addr, passkey);
}

static void auth_cancel(struct bt_conn *conn)
{
   char addr[BT_ADDR_LE_STR_LEN];

   bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

   printk("Pairing cancelled: %s\n", addr);
}

static void pairing_complete(struct bt_conn *conn, bool bonded)
{
   char addr[BT_ADDR_LE_STR_LEN];

   bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

   printk("Pairing completed: %s, bonded: %d\n", addr, bonded);
}

static void pairing_failed(struct bt_conn *conn, enum bt_security_err reason)
{
   char addr[BT_ADDR_LE_STR_LEN];

   bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));

   printk("Pairing failed conn: %s, reason %d\n", addr, reason);
}

static struct bt_conn_auth_cb conn_auth_callbacks = {
   .passkey_display = auth_passkey_display,
   .cancel = auth_cancel,
};

static struct bt_conn_auth_info_cb conn_auth_info_callbacks = {
   .pairing_complete = pairing_complete,
   .pairing_failed = pairing_failed
};
#else
static struct bt_conn_auth_cb conn_auth_callbacks;
static struct bt_conn_auth_info_cb conn_auth_info_callbacks;
#endif

static void app_led_cb(bool led_state)
{
   dk_set_led(USER_LED, led_state);
}

static bool app_button_cb(void)
{
   return app_button_state;
}

static struct bt_lbs_cb lbs_callbacs = {
   .led_cb    = app_led_cb,
   .button_cb = app_button_cb,
};

static void button_changed(uint32_t button_state, uint32_t has_changed)
{
   if (has_changed & USER_BUTTON) {
       uint32_t user_button_state = button_state & USER_BUTTON;

       bt_lbs_send_button_state(user_button_state);
       app_button_state = user_button_state ? true : false;
   }
}

static int init_button(void)
{
   int err;

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

   return err;
}

int main(void)
{
   int blink_status = 0;
   int err;

   printk("Starting Bluetooth Peripheral LBS example\n");

   err = dk_leds_init();
   if (err) {
       printk("LEDs init failed (err %d)\n", err);
       return 0;
   }

   err = init_button();
   if (err) {
       printk("Button init failed (err %d)\n", err);
       return 0;
   }

   if (IS_ENABLED(CONFIG_BT_LBS_SECURITY_ENABLED)) {
       err = bt_conn_auth_cb_register(&conn_auth_callbacks);
       if (err) {
           printk("Failed to register authorization callbacks.\n");
           return 0;
       }

       err = bt_conn_auth_info_cb_register(&conn_auth_info_callbacks);
       if (err) {
           printk("Failed to register authorization info callbacks.\n");
           return 0;
       }
   }

   mpsl_clock_hfclk_latency_set(MPSL_CLOCK_HF_LATENCY_BEST);

   err = bt_enable(NULL);
   if (err) {
       printk("Bluetooth init failed (err %d)\n", err);
       return 0;
   }

   printk("Bluetooth initialized\n");

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

   err = bt_lbs_init(&lbs_callbacs);
   if (err) {
       printk("Failed to init LBS (err:%d)\n", err);
       return 0;
   }

   reason = nrfx_reset_reason_get();

   for(int i=0; i<5; i++){
       dk_set_led(DK_LED1, (++blink_status) % 2);
       k_sleep(K_MSEC(500));

   }

   err = bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad),sd, ARRAY_SIZE(sd));
   if (err) {
       printk("Advertising failed to start (err %d)\n", err);
       return 0;
   }

   for(int i=0; i<5; i++){
       dk_set_led(DK_LED2, (++blink_status) % 2);
       k_sleep(K_MSEC(500));

   }

   printk("Advertising successfully started\n");

   for (;;) {
       dk_set_led(DK_LED3, (++blink_status) % 2);
       k_sleep(K_MSEC(RUN_LED_BLINK_INTERVAL));
   }
}

RE: nrf52840 soft reset cause

katrindqaws — Mon, 12 Feb 2024 15:56:14 GMT

thank you simoiamma

I add this line before bt_enable() line

but the problem has not been solved yet!

my full code is copied from SDK samples:

/** Copyright (c) 2018 Nordic Semiconductor ASA** SPDX-License-Identifier: LicenseRef-Nordic-5-Clause*/#include <zephyr/types.h>#include <stddef.h>#include <string.h>#include <errno.h>#include <zephyr/sys/printk.h>#include <zephyr/sys/byteorder.h>#include <zephyr/kernel.h>#include <zephyr/drivers/gpio.h>#include <soc.h>#include <zephyr/bluetooth/bluetooth.h>#include <zephyr/bluetooth/hci.h>#include <zephyr/bluetooth/conn.h>#include <zephyr/bluetooth/uuid.h>#include <zephyr/bluetooth/gatt.h>#include <bluetooth/services/lbs.h>#include <zephyr/settings/settings.h>#include <dk_buttons_and_leds.h>#include <helpers/nrfx_reset_reason.h>#define DEVICE_NAME             CONFIG_BT_DEVICE_NAME#define DEVICE_NAME_LEN         (sizeof(DEVICE_NAME) - 1)#define RUN_STATUS_LED          DK_LED1#define CON_STATUS_LED          DK_LED2#define RUN_LED_BLINK_INTERVAL  1000#define USER_LED                DK_LED3#define USER_BUTTON             DK_BTN1_MSKstatic bool app_button_state;uint32_t reason;static const struct bt_data ad[] = {BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN),};static const struct bt_data sd[] = {BT_DATA_BYTES(BT_DATA_UUID128_ALL, BT_UUID_LBS_VAL),};static void connected(struct bt_conn *conn, uint8_t err){if (err) {printk("Connection failed (err %u)\n", err);return;}printk("Connected\n");dk_set_led_on(CON_STATUS_LED);}static void disconnected(struct bt_conn *conn, uint8_t reason){printk("Disconnected (reason %u)\n", reason);dk_set_led_off(CON_STATUS_LED);}#ifdef CONFIG_BT_LBS_SECURITY_ENABLEDstatic void security_changed(struct bt_conn *conn, bt_security_t level,enum bt_security_err err){char addr[BT_ADDR_LE_STR_LEN];bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));if (!err) {printk("Security changed: %s level %u\n", addr, level);} else {printk("Security failed: %s level %u err %d\n", addr, level,err);}}#endifBT_CONN_CB_DEFINE(conn_callbacks) = {.connected        = connected,.disconnected     = disconnected,#ifdef CONFIG_BT_LBS_SECURITY_ENABLED.security_changed = security_changed,#endif};#if defined(CONFIG_BT_LBS_SECURITY_ENABLED)static void auth_passkey_display(struct bt_conn *conn, unsigned int passkey){char addr[BT_ADDR_LE_STR_LEN];bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));printk("Passkey for %s: %06u\n", addr, passkey);}static void auth_cancel(struct bt_conn *conn){char addr[BT_ADDR_LE_STR_LEN];bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));printk("Pairing cancelled: %s\n", addr);}static void pairing_complete(struct bt_conn *conn, bool bonded){char addr[BT_ADDR_LE_STR_LEN];bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));printk("Pairing completed: %s, bonded: %d\n", addr, bonded);}static void pairing_failed(struct bt_conn *conn, enum bt_security_err reason){char addr[BT_ADDR_LE_STR_LEN];bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));printk("Pairing failed conn: %s, reason %d\n", addr, reason);}static struct bt_conn_auth_cb conn_auth_callbacks = {.passkey_display = auth_passkey_display,.cancel = auth_cancel,};static struct bt_conn_auth_info_cb conn_auth_info_callbacks = {.pairing_complete = pairing_complete,.pairing_failed = pairing_failed};#elsestatic struct bt_conn_auth_cb conn_auth_callbacks;static struct bt_conn_auth_info_cb conn_auth_info_callbacks;#endifstatic void app_led_cb(bool led_state){dk_set_led(USER_LED, led_state);}static bool app_button_cb(void){return app_button_state;}static struct bt_lbs_cb lbs_callbacs = {.led_cb    = app_led_cb,.button_cb = app_button_cb,};static void button_changed(uint32_t button_state, uint32_t has_changed){if (has_changed & USER_BUTTON) {uint32_t user_button_state = button_state & USER_BUTTON;bt_lbs_send_button_state(user_button_state);app_button_state = user_button_state ? true : false;}}static int init_button(void){int err;err = dk_buttons_init(button_changed);if (err) {printk("Cannot init buttons (err: %d)\n", err);}return err;}int main(void){int blink_status = 0;int err;printk("Starting Bluetooth Peripheral LBS example\n");err = dk_leds_init();if (err) {printk("LEDs init failed (err %d)\n", err);return 0;}err = init_button();if (err) {printk("Button init failed (err %d)\n", err);return 0;}if (IS_ENABLED(CONFIG_BT_LBS_SECURITY_ENABLED)) {err = bt_conn_auth_cb_register(&conn_auth_callbacks);if (err) {printk("Failed to register authorization callbacks.\n");return 0;}err = bt_conn_auth_info_cb_register(&conn_auth_info_callbacks);if (err) {printk("Failed to register authorization info callbacks.\n");return 0;}}mpsl_clock_hfclk_latency_set(MPSL_CLOCK_HF_LATENCY_BEST);err = bt_enable(NULL);if (err) {printk("Bluetooth init failed (err %d)\n", err);return 0;}printk("Bluetooth initialized\n");if (IS_ENABLED(CONFIG_SETTINGS)) {settings_load();}err = bt_lbs_init(&lbs_callbacs);if (err) {printk("Failed to init LBS (err:%d)\n", err);return 0;}reason = nrfx_reset_reason_get();for(int i=0; i<5; i++){dk_set_led(DK_LED1, (++blink_status) % 2);k_sleep(K_MSEC(500));}err = bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad),sd, ARRAY_SIZE(sd));if (err) {printk("Advertising failed to start (err %d)\n", err);return 0;}for(int i=0; i<5; i++){dk_set_led(DK_LED2, (++blink_status) % 2);k_sleep(K_MSEC(500));}printk("Advertising successfully started\n");for (;;) {dk_set_led(DK_LED3, (++blink_status) % 2);k_sleep(K_MSEC(RUN_LED_BLINK_INTERVAL));}}

RE: nrf52840 soft reset cause

simoiamma — Mon, 12 Feb 2024 09:57:54 GMT

Hi katrindqawn,

I had the same problem and it was caused by the high ramp up time delay of the high frequency external crystal. Have a look there: https://devzone.nordicsemi.com/f/nordic-q-a/107808/reset-with-hard-fault-after-bluetooth-advertising

I solved starting the high frequency cristal before enabling ble subsystem, and also setting "mpsl_clock_hfclk_latency_set(MPSL_CLOCK_HF_LATENCY_WORST_CASE);"

Hope it helps.

Simone

RE: nrf52840 soft reset cause

jemalkorra — Mon, 12 Feb 2024 09:33:29 GMT

Hi, there is a function you can use to know the reset reason when the aplication reboots.

/**@brief Function to read the reason for the last reset. The reason is printed in the console. */
void get_reset_reason(void)
{
	int result = hwinfo_get_reset_cause(&reset_cause);
    if (result == 0) // Success, reset_cause now contains the reset cause flags
	{
        LOG_ERR("RESET");

		if (reset_cause & RESET_PIN) LOG_DBG("Reset cause is: RESET_PIN\n"); // 0
		else if (reset_cause & RESET_SOFTWARE) LOG_DBG("Reset cause is: RESET_SOFTWARE\n"); // 1
		else if (reset_cause & RESET_BROWNOUT) LOG_DBG("Reset cause is: RESET_BROWNOUT\n"); // 2
		else if(reset_cause & RESET_POR) LOG_DBG("Reset cause is: RESET_POR\n"); // 3
		else if(reset_cause & RESET_WATCHDOG) LOG_DBG("Reset cause is: RESET_WATCHDOG\n"); // 4
		else if(reset_cause & RESET_DEBUG) LOG_DBG("Reset cause is: RESET_DEBUG\n"); // 5
    	else if(reset_cause & RESET_SECURITY) LOG_DBG("Reset cause is: RESET_SECURITY\n"); // 6
		else if(reset_cause & RESET_LOW_POWER_WAKE) LOG_DBG("Reset cause is: RESET_LOW_POWER_WAKE\n"); // 7
		else if(reset_cause & RESET_CPU_LOCKUP) LOG_DBG("Reset cause is: RESET_CPU_LOCKUP\n"); // 8
		else if(reset_cause & RESET_PARITY) LOG_DBG("Reset cause is: RESET_PARITY\n"); // 9
		else if(reset_cause & RESET_PLL) LOG_DBG("Reset cause is: RESET_PLL\n"); // 10
		else if(reset_cause & RESET_CLOCK) LOG_DBG("Reset cause is: RESET_CLOCK\n"); // 11
		else if(reset_cause & RESET_HARDWARE) LOG_DBG("Reset cause is: RESET_HARDWARE\n"); // 12
		else if(reset_cause & RESET_USER) LOG_DBG("Reset cause is: RESET_USER\n"); // 13
		else if (reset_cause & RESET_TEMPERATURE) LOG_DBG("Reset cause is: RESET_TEMPERATURE\n\n"); // 14
		else LOG_DBG("\n\n reset cause is: %d\n\n",reset_cause);

    	hwinfo_clear_reset_cause(); // Clear the hardware flags. In that way we see only the cause of last reset
    } else if (result == -ENOSYS) 
	{
		LOG_ERR("\n\n there is no implementation for the particular device.\n\n");
    } else 
	{
		LOG_ERR("\n\n negative value on driver specific errors\n\n");
    }
}

In my case the reset reason is RESET_SOFTWARE. But I would like to have more info, how can I get it? I have a zigbee apliocation and I suspect the reset happes after I free the buffer. zb_buf_free(bufid); How can i debug this?

Best regards,