Changeset 303 for branches/atorf/RWTHMindstormsNXT/GetUltrasonic.m

Timestamp:

09/25/08 16:51:10 (5 years ago)

Author:

atorf

Message:

• Adapted more functions (mostly Open*) to work with optional NXT handle
• Modified various minor bugs and help texts

Files:

• branches/atorf/RWTHMindstormsNXT/GetUltrasonic.m (modified) (1 diff)

branches/atorf/RWTHMindstormsNXT/GetUltrasonic.m

@@ -10 +10 @@
 %   |distance = GetUltraSonic(port)| returns the current measurement value |distance| of the NXT
 %   ultrasonic sensor. |distance| represents the measured distance in cm.
+%   If no echo can be detected (which could indicate that either there is
+%   no obstacle in the way, or the ultrasound does not get reflected, e.g.
+%   by fur-like surfaces), the reading will be 255. If no measurement can
+%   be made (defect sensor, cable disconnected, etc.), a value of -1 will
+%   be returned.
+%
 %   The given |port| number specifies the connection port. The value |port| can be
 %   addressed by the symbolic constants |SENSOR_1| , |SENSOR_2|, |SENSOR_3| and |SENSOR_4| analog to