NRF_EVT_FLASH_OPERATION_SUCCESS event never fired

[Daniel Dakhno]

I am using the following code to enable the softdevice s130, which seems to run successfully:

    err_code = softdevice_enable(&ble_enable_params);
    APP_ERROR_CHECK(err_code);

    // Subscribe for BLE events.
    err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
    APP_ERROR_CHECK(err_code);

    err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
    APP_ERROR_CHECK(err_code);

My sys_evt_dispatch then tries to filter out FLASH events, but never gets called:

void sys_evt_dispatch(uint32_t sys_evt) {
    NRF_LOG_WARNING("evt is flash: %d\n", sys_evt == NRF_EVT_FLASH_OPERATION_SUCCESS || sys_evt == NRF_EVT_FLASH_OPERATION_ERROR);
    storage_on_sys_evt(sys_evt);
    ble_advertising_on_sys_evt(sys_evt);
}

So, I never receive the 

NRF_EVT_FLASH_OPERATION_SUCCESS event, although something is being written onto the flash.

Is there any need to enable specific events for this? Do I need to do any additional setup to receive NRF_EVT_FLASH_OPERATION_SUCCESS and NRF_EVT_FLASH_OPERATION_ERROR?

Kind regards,

Daniel

[Einar Thorsrud]

Hi Daniel,

Your sys_evt_dispatch() function that was registered with softdevice_sys_evt_handler_set() will be called for any system events, so if there is  a NRF_EVT_FLASH_OPERATION_SUCCESS or NRF_EVT_FLASH_OPERATION_ERROR it will be called (unless there is another issue somewhere that prevents the code from ever running).

I do not see a filter in you rcode snippets, but I see that you print "evt is flash: " and will get 0 printed for most events for most events and 1 for the two you have specified. Is the issue here that you don't get any events, or do you always see "evt is flash: 0"? What do you do when you would have expected the event? Perhaps you can share a bit more of your code and how you test and what you see so that i get a full(er) picture of what you are doing?

Einar

[Daniel Dakhno]

Hi,

thanks for your answer, I was hoping I forgot something obvious. My issue that I am not seeing any events in that callback. So no DEBUG prints at all.

Firstly, I am setting the event handler here. Then, I am calling dfu_init here, which sometimes issues a flash page erase.

Then, I am calling advertising_start here, which may fail to start since there is a pending flash operation and waits for the NRF_EVT_FLASH_OPERATION_SUCCESS event to start advertising.

That event does not seem to arrive, though, hence the advertising never starts.

Kind regards,

Daniel

[Einar Thorsrud]

I don't see anything obviously wrong related to the sys events in your code. Could it be that there is another issue that causes this as a side effect, for instance a same or higher priority interrupt that never completes, or something else that blocks it from being executed?

[Daniel Dakhno]

As far as i am concerned there is no Interrupt being fired at the same time. Also, my code continues executing after a flash event should be fired, so no ISR seems to block the processor...

[Einar Thorsrud]

I see... Which version of the S130 are you using? And which SDK, and also, which revision of the nRF51?

[Daniel Dakhno]

I am using s130 2.0.1, SDK 12.3 and an nRF51 qfac.

[Einar Thorsrud]

I see. I am not able to find anything. Are you able to reproduce this on a nRF51 DK? If so, can you share project that runs out of the box and reproduces this issue with me (along with instructions on how to reproduce the issue) so that I can have a closer look?