21. High-level API Reference
YLightSensor
lightsensor
→
registerValueCallback()
Registers the callback function that is invoked on every change of advertised value.
js
function registerValueCallback(
callback
)
cpp
int registerValueCallback( YLightSensorValueCallback
callback
)
m
-(int) registerValueCallback : (YLightSensorValueCallback)
callback
pas
function registerValueCallback(
callback
: TYLightSensorValueCallback): LongInt
vb
function registerValueCallback( ) As Integer
cs
int registerValueCallback( ValueCallback
callback
)
java
int registerValueCallback( UpdateCallback
callback
)
uwp
async Task<int> registerValueCallback( ValueCallback
callback
)
py
def registerValueCallback(
callback
)
php
function registerValueCallback(
$callback
)
es
function registerValueCallback(
callback
)
The callback is invoked only during the execution of
ySleep
or
yHandleEvents
. This provides
control over the time when the callback is triggered. For good responsiveness, remember to call one of
these two functions periodically. To unregister a callback, pass a null pointer as argument.
Parameters :
callback
the callback function to call, or a null pointer. The callback function should take two arguments:
the function object of which the value has changed, and the character string describing the new
advertised value.
www.yoctopuce.com
401
Содержание Yocto-RangeFinder
Страница 1: ...Yocto RangeFinder User s guide...
Страница 2: ......
Страница 18: ...12 www yoctopuce com...
Страница 26: ...20 www yoctopuce com...
Страница 42: ...36 www yoctopuce com...
Страница 70: ...gcc lyocto lm lpthread lusb 1 0 lstdc 10 Using Yocto RangeFinder with C 64 www yoctopuce com...
Страница 90: ...84 www yoctopuce com...
Страница 120: ...114 www yoctopuce com...
Страница 130: ...124 www yoctopuce com...
Страница 158: ...21 High level API Reference On failure throws an exception or returns a negative error code 152 www yoctopuce com...
Страница 484: ...478 www yoctopuce com...
Страница 488: ...482 www yoctopuce com...
Страница 490: ...23 Characteristics 484 www yoctopuce com...
Страница 491: ......
Страница 492: ......