ADXL345 interrupts

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Hello,

I am trying to get my arduino to sleep and wake up on event from adxl345. So far so good->that part was easy.

But…

I can do that only once or twice and then my device hungs completely.

Unless i od that constantly:

interrupts = adxl.getInterruptSource();
    do {

      //Activity
      if (adxl.triggered(interrupts, ADXL345_ACTIVITY)) {
        Serial.println("*** ACTIVITY ***");
        bb(); //blink
        adxl.get_Gxyz(xyz);
      }
      interrupts = adxl.getInterruptSource();
      Serial.println ("Interrupts="+(String)interrupts);
    } while (interrupts != 0); //never true

It looks like internal buffer is filling … so I put FIFO to bypass mode during setup().

	setRegisterBit(ADXL345_FIFO_CTL, 7, 0); 
	setRegisterBit(ADXL345_FIFO_CTL, 6, 0);

but it did not help…

Have you seen a proper way to handle adxl345 with interrupts and sleep?