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  • Case ID: 290579
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SOFTDEVICE: INVALID MEMORY ACCESS at INFO=2

user116950

Hi,

I'm using the nRF52840 SDKs (15.0.0) and nRF-IEEE-802.15.4-radio-driver(1.1.0). BLE and the CoAP baseed on 802.15.4 work fine, but when I  call this function 

void
ble_advertising_stop_nrf52840(void)
{
  uint32_t err_code = 0;

  PRINTF("ble_advertising_stop_nrf52840() >>>\n");

  err_code = sd_ble_gap_adv_stop(m_adv_handle);
  PRINTF("sd_ble_gap_adv_stop() returned %ld\n", err_code);

  if((err_code == NRF_SUCCESS) ||
     (err_code == NRF_ERROR_INVALID_STATE))
  {
    /* Documentation states that if NRF_ERROR_INVALID_STATE is
    * returned then the ble stack is likely not in an advertising
    * state. So we assume that adverts are off and everything is
    * working as expected. */
    m_is_advertising = false;
  }
  else
  {
    /* reboot device because of fatal error */
    BLE_ERROR_CHECK(err_code);
  }
  PRINTF("ble_advertising_stop_nrf52840() <<<\n");
}    (I checked the err_code above, it is NRF_SUCCESS)
 

After several minutes I got the "SOFTDEVICE: INVALID MEMORY ACCESS" fault. 

According to the INFO = 2 message. There seems to be the radio peripheral violation. After I dumped assembly form   .elf   file. The pc address 0x76ad6 points to a branch in nrf_802154_core.c file. 

The .c file is as below.

Then I added a print(); function before result = false;  then I can't see any messages. Then I print the 

nrf_802154_rsch_timeslot_us_left_get() , it indeed >MAX_CRIT_SECT_TIME.

After I added the print(); funciton, The PC changed ,but it still stoped at nRF-IEEE-802.15.4-radio-driver. If I comment out the ble_advertising_stop_nrf52840(void) function, it works fine.

So can you please help me?

Best regards

  • 0

    Hello,

    So you are using the 802154 radio driver that is used in the SDK for Thread and Zigbee? 

    After several minutes I got the "SOFTDEVICE: INVALID MEMORY ACCESS" fault. 

    Does this mean that you are calling sd_ble_gap_adv_stop() several times over several minutes, or does it take several minutes for the error to occur after calling it once?

    What else are you doing in the meantime? I assume you are not advertising? Are you in a connection? Are you scanning? Do you overstay any of the timeslots? I didn't understand what you meant by:

    nrf_802154_rsch_timeslot_us_left_get() , it indeed >MAX_CRIT_SECT_TIME.

    Does the issue occur inside a timeslot, or outside?

    After I added the print(); funciton, The PC changed ,but it still stoped at nRF-IEEE-802.15.4-radio-driver.

    That is probably because of the rebuild that things get shuffled around. 

    Is there anything else I should know? Are you using FreeRTOS?

    Best regards,

    Edvin

  • 0 in reply to user26071

    Hi Edvin,

    Thank you for your reply.  The 802154 radio driver is an individual version, I uploaded the radio driver for your reference.

    Does this mean that you are calling sd_ble_gap_adv_stop() several times over several minutes, or does it take several minutes for the error to occur after calling it once?

    I called this function only once. It takes several minutes for the error to occur.

    What else are you doing in the meantime?I assume you are not advertising? Are you in a connection? Are you scanning? 

     After sd_ble_gap_adv_stop() is called, I use nRFconnect mobile app to see RSSI Graph.It confirms it's not advertising. I am not in a connection. And I'm not scanning. 
     I didn't understand what you meant by:nrf_802154_rsch_timeslot_us_left_get() , it indeed >MAX_CRIT_SECT_TIME.
    since the PC stopped here.
    I checked the remaining_timeslot_time_is_enough_for_crit_sect()
     it indeed >MAX_CRIT_SECT_TIME.
    I mean nrf_802154_rsch_timeslot_us_left_get() >= MAX_CRIT_SECT_TIME;
    below are nrf_802154_rsch_timeslot_us_left_get()  values after Stopped BLE Adverts.
    Do you overstay any of the timeslots?
    I don't know how to estimate this.But  If I comment out the ble_advertising_stop_nrf52840(void) function, it works fine. So I don't think I overstay any of the timeslots.

    Does the issue occur inside a timeslot, or outside?

    Sorry, I don't know how to estimate this either. I can't debug the code.I can only print messages.

    Is there anything else I should know? Are you using FreeRTOS?

    I am using CONTIKI.

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