RE: NRF52832 BLE scanning event not triggered after some time(randomly like 1hour, 3 hour)

AKanade — Fri, 13 Dec 2019 07:37:27 GMT

hi balajiks

nRF52832 is new for me and i want to start working on this board

So, can you please guide me, form where i can start writing code for scanning program using FreeRtos.

Or please share your scanning project code with me, so it will be very helpful for me

RE: NRF52832 BLE scanning event not triggered after some time(randomly like 1hour, 3 hour)

balajiks — Tue, 23 Jul 2019 08:19:45 GMT

Thanks susheel.

i will make changes in my code base and update you later

RE: NRF52832 BLE scanning event not triggered after some time(randomly like 1hour, 3 hour)

Susheel Nuguru — Tue, 23 Jul 2019 08:13:38 GMT

This was fixed in SDK15.3, there was a corner case in the below file

nRF5_SDK_15.2.0_9412b96\components\softdevice\common\nrf_sdh_freertos.c

Please replace contents of SD_EVT_IRQHandler() and softdevice_task() functions to below

void SD_EVT_IRQHandler(void)
{
    BaseType_t yield_req = pdFALSE;

    vTaskNotifyGiveFromISR(m_softdevice_task, &yield_req);

    /* Switch the task if required. */
    portYIELD_FROM_ISR(yield_req);
}


/* This function gets events from the SoftDevice and processes them. */
static void softdevice_task(void * pvParameter)
{
    NRF_LOG_DEBUG("Enter softdevice_task.");

    if (m_task_hook != NULL)
    {
        m_task_hook(pvParameter);
    }

    while (true)
    {
        nrf_sdh_evts_poll();                    /* let the handlers run first, incase the EVENT occured before creating this task */

        (void) ulTaskNotifyTake(pdTRUE,         /* Clear the notification value before exiting (equivalent to the binary semaphore). */
                                portMAX_DELAY); /* Block indefinitely (INCLUDE_vTaskSuspend has to be enabled).*/
    }
}

In SDK15.2, softdevice_task was calling vTaskSuspend unconditionally. which could cause deadlocks. This is fixed in SDK15.3

Left in the picture above is from SDK15.3 and right is SDK15.2