NRF_EVT_FLASH_OPERATION_SUCCESS fired only if Radio notifications enabled.

[Valer_I]

Hello, Before writing here I made some forum search and didn't find the answer. Previously I used radio notifications to sync ADC measurements with radio events. Now I need to disable radio notifications in the project and noticed that firmware become working unstable. The BLE connection breaks ocasionally and the flash write operations stuck. Softdevice used S110. I do not use pstorage but use own functions. Flash operation states are read from SD_EVT_IRQHandler (SWI2) ( NRF_EVT_FLASH_OPERATION_SUCCESS and NRF_EVT_FLASH_OPERATION_ERROR ). Noticed that no interrupt fired after flash operation (sd_flash_write()) . What could cause such behaviour? Why enabling Radio notifications make flashoperation working?

P.S. I read the errata for softdevice but do not see the link with my issue.

[Valer_I]

The scheme of my NV functionality is next:

void SD_EVT_IRQHandler(void){
 uint32_t evt_id;
 while (sd_evt_get(&evt_id)!= NRF_ERROR_NOT_FOUND){
switch (evt_id){
case NRF_EVT_FLASH_OPERATION_SUCCESS:
if(need_to_write) sd_flash_write();
else set(EVENT);
break;				
 case NRF_EVT_FLASH_OPERATION_ERROR:            
set(EVENT);
break;
}
}
	
void flash_write(){  //erase page and wait until write operation started on erase operation finished. Than after write operation finished issue EVENT to break while loop.   
sd_flash_erase();
while( !EVENT || !TIMEOUT);
}

This works if radio notifications enabled, otherwise no interrupt triggered.