[garyk]

Originally Posted by dratewka2

We are declaring the LightWhite as a DigitalInput;
then LightWhite = new DigitalInput(5);
we do... if (LightWhite->Get()==1)
{...do something...}

but we do not get the if to be entered....
any ideas???

Are the indicators on the body of the Light Sensor (assuming it's the KOP sensor) showing it's detecting light or dark? The interpretation of the indicators is among the information on the data sheet that came in each sensor bag. If the indicators aren't showing that an object is seen, the cRIO isn't going to see it either.

And the sensor's brown wire is wired to +12v, the blue wire to - ?. And according to your code, the white wire is connected to a DI and the black wire is cut and taped so it won't short to anything?

It's puzzling, but DigitalInput->Get() does not return a boolean, but an UINT32. Please see "WPILib C++ Reference" in c:\windriver\docs\extensions\FRC\.

An UINT32 is an unsigned 32 bit int, but all we care about is that it returns 1 or 0. In c++, as in c, an int can be interpreted as a boolean in an if().

Your

 if (LightWhite->Get()==1) {}

should work, the old-school C way of doing it is

 if (LightWhite->Get()) {}

.

Strictly speaking,

 if (LightWhite->Get())

is identical to

 if (LightWhite->Get() != 0)

but the effect is the same since the DI returns 0 0r 1.