DioDmGetDirection

Function

Retrieves the I/O direction of specified device.

Format

Ret = DioDmGetDirection ( Id , Direction )

Parameters

Id [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the device ID retrieved from DioInit.

Directoin [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the address of the variable to store the I/O direction.

Definition	Value [Dec]	Description
PI_32	1	32-bit input
PO_32	2	32-bit output
PIO_1616	3	16-bit input and 16-bit output

Return Value

Ret [ VB.NET: Integer ] [ C, C++: long ] [ C#: int ] [ Python: ctypes.c_long ]

Definition	Value [Dec]	Description
DIO_ERR_SUCCESS	0	Normal completed.
DIO_ERR_SYS_RECOVERED_FROM_STANDBY	7	Execute DioResetDevice function because the device has recovered from standby mode.
DIO_ERR_DLL_INVALID_ID	10001	Invalid ID specified.
DIO_ERR_DLL_CALL_DRIVER	10002	Not call the driver (Failure on DEVICE I/O CONTROL).
DIO_ERR_SYS_NOT_SUPPORTED	20001	This board couldn't use this function.

The others (See also: Details of Error Code)

Initial Value

The initial value of I/O direction is PI_32.

Example

Retrieves the I/O direction being set.

VB.NET	Dim Ret As Integer Dim Direction As Short Ret = DioDmGetDirection ( Id , Direction )
C, C++	long Ret; short Direction; Ret = DioDmGetDirection ( Id , &Direction );
C#	int Ret; short Direction; Ret = dio.DmGetDirection ( Id , out Direction );
Python	Ret = ctypes.c_long() Direction = ctypes.c_short() Ret.value = cdio.DioDmGetDirection ( Id , ctypes.byref(Direction) )