how to convert from port to single line

[adiman84]

Hi all,

I have a program (VB.net) that reads a whole digital port (8bits) in a certain time interval.  Now, I would like to write a function that can extract a certain bit from that port data and check whether the line that corresponds to this bit is 0 or 1.

Right now I am using the command ReadSingleSamplePortByte, also tried it with the one that returns a UInt32. So, from that data I would like to extract the information for line 3, for example. Any ideas how I can do this? I thought about masking, but don't know how I can convert the data into a boolean array.

Thanks,

Adrian

[Tom__Sedlack]

"AND" the value returned with the bit value you are looking for.  From your example, you can determine bit 3 being 1 or 0 by:

        Dim PortValue As Byte

        Dim BitValue As Boolean
        DIM TestBit as Integer=3

        PortValue = ReadSingleSamplePortByte

        BitValue = (PortValue And 2 ^ TestBit)
        MsgBox(BitValue)

Dimensioning BitValue as a Boolean gives you a TRUE/FALSE value.  Dimensioning as a Byte will give you a 1/0 value.