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support for max-duration in pulse-in

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Peli de Halleux
2016-08-17 11:35:54 -07:00
parent 8e811b913e
commit 9f31637000
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docs/reference/pins/pulse-in.md
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@ -18,12 +18,13 @@ Please read the [page about pins](/device/pins) carefully.
* ``name`` is a [string](/reference/types/string) that stores the name of the pin (``P0``, ``P1``, or ``P2``, up through ``P20``)
* ``value`` is the value of the pulse, ``high`` or ``low``
* ``maxDuration``, maximum duration in micro-seconds. If no pulse is received
### Returns
* a [number](/reference/types/number) that represents the pulse duration in micro-seconds
### Example: football score keeper
### Example: Measuring distance with a sonar
The following script sends a pulse on ``P0`` and reads the pulse returned by a HC-SR04 sonar to determine the distance of the object in front of the sensor.