Problem with fstorage and ble active in Release mode

[Stebitt]

I'm using nRF52832 SoC with nRF5_SDK17.1.0 and SoftDevice v7.3.0. I'm using following code to write data into flash.

 err_code = nrf_fstorage_write(&g_fs, write_addr, buffer32, 128, NULL);

  wait_while_fs_busy(&g_fs);

/* Wait helper: sleep while fstorage is busy (write/erase are async). */
static void wait_while_fs_busy(nrf_fstorage_t const * p_fs)
{
    uint32_t waited_ms = 0;

    while (nrf_fstorage_is_busy(p_fs))
    {

      if ((p_fs->p_api == &nrf_fstorage_sd) && nrf_sdh_is_enabled())
      {
           __enable_irq();
           __set_BASEPRI(0);
           (void)sd_app_evt_wait();
      }
      else
      {
            __WFE();
      }

      (void)NRF_LOG_PROCESS();
      waited_ms++;
      if (waited_ms > 5000)
      {
         NRF_LOG_ERROR("fstorage wait timeout");
         break;
      }
      NRF_LOG_PROCESS();
   }
}

It works fine when compiled in debug mode.

Whenever it's compiled in release mode and fstorage is used while ble is connected, the code enters 2 to 3 times sd_app_evt_wait(); an then hangs in this function.

Whenever it's compiled in release mode and fstorage is used after ble is disconnected, the code enters sd_app_evt_wait(); and hangs in this function immediately.

--> I guess no event is generated any more or masked.

Why this is happening?

[Susheel Nuguru]

Hi Stephan, 

Your wait_while_fs_busy function is too complex and unnecessary. We have already exposed the helper to check the status on nrf_storage . Your wait function can just use nrf_fstorage_is_busy

void wait_while_fs_busy(nrf_fstorage_t const * p_fstorage)
{
    /* While fstorage is busy, sleep and wait for an event. */
    while (nrf_fstorage_is_busy(p_fstorage))
    {
        power_manage();
    }
}

[Stebitt]

Thanks for your replay. Will power_manage()  comply with SD functionality?

could you please post the code of power_manage() - thanks

Remark to 'wait_while_fs_busy function is too complex' : I tried also only the call of sd_app_evt_wait();   --> with same result - it hangs in this call

In this case, the loop  'wait_while_fs_busy  goes twice in sd_app_evt_wait(); within 30us and this repeats after 650us  6 times and then hangs again in sd_app_evt_wait();

[Susheel Nuguru]

Are you calling wait_while_fs_busy from main context or some other interrupt context?
I cannot do online meetings, if you can give me your code, I can do a quick test on my end to see why this happens only in released mode. Clearly there seems to be some timing issue.

[Stebitt]

It's called from the main. Here my code...

All the LED_ON / LED_OFF sequences are for debugging to see on an oscilloscope where the code goes through. 

 nrf52_ble_fw-pool - FLO2_v03 - nRF.zip

[Stebitt]

Hi - could you load my code to you platform and test it? 

[Stebitt]

Hi support - I wonder if you could proceed with testing our code regarding the issue we have.

Another attempt would be if you would provide me a code where BT communication and fstorage runs in compiled mode. Then we could add our application step by step to it. 

I would like to emphasize that we really need your support in this matter.

[Susheel Nuguru]

Hi Stephan, I am really sorry, this thread fell out of my visible queue. I will take a look at your project tomorrow. Sorry for the delays.