nRF52 radio bit counter

RE: nRF52 radio bit counter

ovrebekk — Fri, 03 Mar 2017 08:32:45 GMT

Hi Oskar
Yes, events are used to generate interrupts. First you have to allow that event to create interrupts by setting the right bit in the NRF_RADIO->INTENSET register, enable the interrupt for the radio peripheral itself, and implement the interrupt handler.

Example:

NRF_RADIO->INTENSET = RADIO_INTENSET_END_Msk;        
NVIC_EnableIRQ(RADIO_IRQn);     
     
void RADIO_IRQHandler(void)           
{        
  if(NRF_RADIO->EVENTS_END)       
  {         
    NRF_RADIO->EVENTS_END = 0;        
    // Count the events here      
  }        
}

RE: nRF52 radio bit counter

Oskar Baginski — Thu, 02 Mar 2017 10:07:42 GMT

Well I have one more question, how to count END events? I thought about checking value of the certain register but it requires timer(very fast actually) and using one is not an option. Does END event equal interrupt so I could handle it?

RE: nRF52 radio bit counter

ovrebekk — Thu, 02 Mar 2017 07:28:35 GMT

I am glad to hear it. The best of luck on your project :)

RE: nRF52 radio bit counter

Oskar Baginski — Wed, 01 Mar 2017 18:21:48 GMT

Yes indeed, I'm working on my own protocol and I think the biggest obstacle I faced has been defeated thanks to your advice.

RE: nRF52 radio bit counter

ovrebekk — Wed, 01 Mar 2017 15:55:58 GMT

If you are making your own protocol then it's definitely an option. If you are using one of our libraries, such as nrf_esb.c or Gazell, then I think it's easier just to update a variable in the TX callback function.

RE: nRF52 radio bit counter

Oskar Baginski — Wed, 01 Mar 2017 15:48:57 GMT

I suppose that PPI module is solution. Thank you for help, Torbjørn

RE: nRF52 radio bit counter

ovrebekk — Wed, 01 Mar 2017 15:30:03 GMT

Hi Oskar

The bit counter is intended to count bits within the packet, and not entire packets. To count total packets you would be better of just updating a variable in the code (since you probably need to run some processing before/after each packet anyway), or set up a timer module in counter mode and have it count the END events through the PPI.

We don't have any examples for the bit counter, no, but it is used internally by some of our stacks and libraries.

Best regards
Torbjørn