DioEchoBackMultiByte

Function

Inputs multiple ports for the status of multiple output ports.

Format

Ret = DioEchoBackMultiByte ( Id , PortNo , PortNum , Data )

Parameters

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

PortNo [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Store the logical output port numbers into an array, and specify the base address of this array.

PortNum [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the number of ports which are specified by PortNo. The maximum number of ports is 256.

Data [ VB.NET: Byte ] [ C, C++: BYTE * ] [ C#: out byte ] [ Python: ctypes.POINTER(ctypes.c_ubyte) ]
Specify the address of the variable to store the output data. The output data are returned by hex number from 0H to FFH.

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.
DIO_ERR_SYS_NOT_SUPPORTED	20001	This board couldn't use this function.
DIO_ERR_SYS_PORT_NO	20100	Port No. beyond the limit.
DIO_ERR_SYS_PORT_NUM	20101	Port number beyond the limit.

The others (See also: Details of Error Code)

Initial Value

The initial values of output data are 0 after the device is reset. (DIO-0808RN-USB is set to FFH)

Remarks

Inputs multiple ports for the status of multiple output ports. Before this function is called, it is necessary that the logical port numbers to be input are set into the array specified by PortNo. The data are stored into the array named Data by the order of logical ports which are specified by PortNo.
The output data are returned by hex number from 0H to FFH.
This function is used for monitoring the outputting contents.

Example

Inputs the status of output port 0 and 1.

VB.NET	Dim Ret As Integer Dim PortNo(1) As Short Dim Data(1) As Byte PortNo(0) = 0 PortNo(1) = 1 Ret = DioEchoBackMultiByte ( Id , PortNo , 2 , Data )
C, C++	long Ret; short PortNo[2] BYTE Data[2]; PortNo[0] = 0; PortNo[1] = 1; Ret = DioEchoBackMultiByte ( Id , PortNo , 2 , Data );
C#	int Ret; short[] PortNo = new short[2]; byte[] Data = new byte[2]; PortNo[0] = 0; PortNo[1] = 1; Ret = dio.EchoBackMultiByte ( Id , out PortNo , 2 , out Data );
Python	Ret = ctypes.c_long() PortNoType = ctypes.c_short * 2 PortNo = PortNoType() DataType = ctypes.c_ubyte * 2 Data = DataType() PortNo[0] = 0 PortNo[1] = 1 Ret.value = cdio.DioEchoBackMultiByte ( Id , PortNo , 2 , Data )