Yoctopuce Yocto-RangeFinder, Руководство пользователя, Страница: 85 / 497

get_currentValue
The
get_currentValue()
method of the object returned by
YRangeFinder.FindRangeFinder
allows you to obtain the distance measured by the sensor,
in mm or in inches depending on the sensor configuration.
A real example
Launch Microsoft Visual C# and open the corresponding sample project provided in the directory
Examples/Doc-GettingStarted-Yocto-RangeFinder of the Yoctopuce library.
In this example, you will recognize the functions explained above, but this time used with all side
materials needed to make it work nicely as a small demo.
using System ;
using System.Collections.Generic ;
using System.Linq ;
using System.Text ;
namespace ConsoleApplication1
{
class Program
{
static void usage ()
{
string execname = System . AppDomain . CurrentDomain . FriendlyName ;
Console . WriteLine ( ex " <serial_number>" ) ;
Console . WriteLine ( ex " <logical_name>" ) ;
Console . WriteLine ( ex " any " ) ;
Environment . Exit ( 0 ) ;
}
static void Main ( string [] args )
{
string errmsg = "" ;
string target;
YRangeFinder rf;
YLightSensor ir;
YTemperature tmp;
if ( args. Length < 1 ) usage () ;
target = args [ 0 ] . ToUpper () ;
// Setup the API to use local USB devices
if ( YAPI. RegisterHub ( "usb" , ref errmsg ) != YAPI. SUCCESS ) {
Console . WriteLine ( "RegisterHub error: " + errmsg ) ;
Environment . Exit ( 0 ) ;
}
if ( target == "ANY" ) {
rf = YRangeFinder. FirstRangeFinder () ;
if ( rf == null ) {
Console . WriteLine ( "No module connected (check USB cable) " ) ;
Environment . Exit ( 0 ) ;
}
target = rf. get_module () . get_serialNumber () ;
} else rf = YRangeFinder. FindRangeFinder ( ".rangefinder1" ) ;
if ( !rf. isOnline ()) {
Console . WriteLine ( "Module not connected (check identification and USB cable)" ) ;
Environment . Exit ( 0 ) ;
}
ir = YLightSensor. FindLightSensor ( ".lightSensor1" ) ;
tmp = YTemperature. FindTemperature ( ".temperature1" ) ;
while ( rf. isOnline ()) {
Console . WriteLine ( "Distance : " + rf. get_currentValue () . ToString ()) ;
Console . WriteLine ( "Ambiant IR : " + ir. get_currentValue () . ToString ()) ;
Console . WriteLine ( "Temperature : " + tmp. get_currentValue () . ToString ()) ;
Console . WriteLine ( " (press Ctrl-C to exit)" ) ;
YAPI. Sleep ( 1000 , ref errmsg ) ;
}
YAPI. FreeAPI () ;
}
13. Using Yocto-RangeFinder with C#
www.yoctopuce.com 79