nRF 51822 radio receive running error

RE: nRF 51822 radio receive running error

JiachengWang — Fri, 31 Jul 2015 03:46:18 GMT

The timeout is 10ms.

Thanks a lot for your suggestion, I'll try more.

RE: nRF 51822 radio receive running error

Hung Bui — Thu, 30 Jul 2015 15:23:27 GMT

@Jiacheng: How long is the timeout ?

If you have an interrupt that can interrupt between the time you assign initial_timer and the while loop code, then you can easily get a timeout, depend on how much time that interrupt handler uses. Also if you are receiving something, I don't think you will have the RADIO disabled immediately.

I suggest you to put the assign initial_timer = NRF_RTC0->COUNTER; right above the while loop. And maybe increase the timeout so that it should be OK when the code is preempted by the interrupt.

RE: nRF 51822 radio receive running error

JiachengWang — Thu, 30 Jul 2015 02:29:03 GMT

Thanks a lot for your comment.

With more debug, it seems the problem is in the "while" loop of radio disable. with following update of radio disable code:

  NRF_RADIO->EVENTS_DISABLED = 0U;
  /* Disable radio */
  NRF_RADIO->TASKS_DISABLE = 1U;
  while(NRF_RADIO->EVENTS_DISABLED == 0U)
  {
	  /* radio disable time out */	
		if (((NRF_RTC0->COUNTER - initial_timer) > (wait_time_out_ms + 1)) || (NRF_RTC0->COUNTER < initial_timer))
		{		
#if (IF_PRINT_LOG)
      printf("..................Radio disable time out in Rx..................\r\n" );
#endif
      /* system reset */
      NVIC_SystemReset( );
    }
  }

some time the radio disable is running time out. Because I have another function have higher priority than radio Rx listening, if the radio is interupted while it is listening, the radio disable has problem.

RE: nRF 51822 radio receive running error

Hung Bui — Mon, 27 Jul 2015 09:16:14 GMT

@JiachengWang: If you don't use watchdog, in which loop would the program stuck in this function ? I don't see any reason it should be stuck here.