/** * returns the mean of N raw values of aixs indicated by the index number . * * @param index Indicates the axis (x=0,y=1,z=2). * @return The mean value. */ private float getRawMean(int index) { int t = 0; for (int i = 1; i <= samples; i++) { accel.fetchRawAccel(raw); t += raw[index]; try { Thread.sleep(10); } catch (InterruptedException ex) { } } return t / samples; }
/** * Displays the raw value of axis indicated by index. A low pass filter is applied on the raw * values to make reading easier. * * @param index Indicates the axis (x=0,y=1,z=2). */ private void showLowPass(int index) { float alpha = 0.95f; float lowpassed = 0; while (!Button.ENTER.isDown()) { accel.fetchRawAccel(raw); lowpassed = alpha * raw[index] + (1.0f - alpha) * lowpassed; LCD.drawString(Double.toString(lowpassed), 0, 3); try { Thread.sleep(150); } catch (InterruptedException ex) { } } while (Button.ENTER.isDown()) ; }