DioGetMaxPorts

Function

Retrieves the number of I/O ports of a device.

Format

Ret = DioGetMaxPorts ( Id , InPortNum , OutPortNum )

Parameters

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

InPortNum [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the address of the variable to store the number of input ports.

OutPortNum [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the address of the variable to store the number of output ports.

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_DLL_BUFF_ADDRESS

10100

Invalid data buffer address.

The others (See also: Details of Error Code)

Initial Value

None

Remarks

Retrieves the number of input ports and output ports of a device.
For USB device, retrieves the total number of I/O ports of all stacked modules.

Example

Retrieves the number of I/O ports of a device.

VB.NET

Dim Ret As Integer
Dim InPortNum As Short
Dim OutPortNum As Short
Ret = DioGetMaxPorts ( Id , InPortNum , OutPortNum )
 

C, C++

long Ret;
short InPortNum;
short OutPortNum;
Ret = DioGetMaxPorts ( Id , &InPortNum , &OutPortNum );
 

C#

int Ret;
short InPortNum;
short OutPortNum;
Ret = dio.GetMaxPorts ( Id , out InPortNum , out OutPortNum );
 

Python

Ret = ctypes.c_long()
InPortNum = ctypes.c_short()
OutPortNum = ctypes.c_short()
Ret.value = cdio.DioGetMaxPorts ( Id , ctypes.byref(InPortNum) , ctypes.byref(OutPortNum) )
 

See Also

None