Measurement-computing UL for NI LabVIEW Manuel d'utilisateur télécharger pdf (Page 72)

Universal Library Virtual Instruments (VIs) Digital I/O VIs

DCfgBit.VI

Configures a specific digital bit within a digital port for input or output. This function treats all DIO ports on a

board as a single port (AUXPORT). This function is not supported by 8255 type DIO ports. Please refer to

board-specific information for details.

Summary:

Input: BoardNum [U32] - The board number assigned when installed with InstaCal. Can

be 0 to 100.

PortType [I32] - Digital I/O port containing the bit to configure.

BitNum - The bit number to configure as input or output.

Bit Direction [TF] - DIGITALOUT or DIGITALIN

Output:

BoardNum [U32] - The board number assigned when installed with InstaCal. Can

be 0 to 100. Can be used to pass

BoardNum parameter to another VI.

ErrCode [I32] - Error code. See ErrMsg.VI

Arguments:

BoardNum The board number associated with a board when it was installed with InstaCal.

PortType Specifies the digital I/O port whose bit to configure. The DCfgBit.VI supports

AUXPORT types only.

BitNum The bit number to configure as input or output. Can be 0 to 7 for AUXPORT types.

Bit Direction DIGITALOUT (True) or DIGITALIN (False - default) sets the digital bit as input

or output.

BoardNum (Out) The board number used when installed with InstaCal. This parameter can be used

to serialize VIs such that this VI precedes the next VI whose

BoardNum is attached

to this output.

ErrCode Error code returned from the Universal Library. Zero if no error occurred. Use

ErrMsg.VI to convert

ErrCode into a readable string.

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Measurement-computing UL for NI LabVIEW Manuel d'utilisateur Page 72