AN-000227
Document Number: AN-000227
Page 10 of 15
Revision: 1.0
•
Reset the SmartSonic board using the board’s reset button (next to the Programming EDBG connector).
•
Status messages from the application will appear on the terminal output, followed by summary data from
the sensor initialization (device frequency, etc.) and configuration (maximum range, etc.).
•
Measurement data from each sensor device will then be output in a continuous loop. During each
measurement cycle, a line of output is generated for each sensor. Each line of output includes:
o
Internal timestamp value
o
Sensor number
o
Boolean indicator of whether object presence was detected (0 = no presence, 1 = presence)
o
Range measurement, expressed in millimeters
o
Confidence level (expressed as a percentage). In the presence algorithm the detection of motion
is based on a criterion passing a threshold. The confidence is derived from the following criterion
value (the criterion value is defined in the algorithm and is not settable in the end application):
If the criterion < threshold, confidence is 0 (or very low)
If the criterion
≥
10 x threshold, confidence is maximum (100%)
In between the confidence is linearized.
•
If more than one sensor is used, an additional line of output is generated during each measurement cycle,
with a merged result based on combined data from all sensors.
