Measurement-computing ADLIB WIN Bedienungsanleitung PDF herunterladen (Seite 111)

Chapter 34 Data Offsets

25-1

25. DATA OFFSETS

Data Offsets allows the random ordering of Bipolar and Unipolar channel input types to be programmed

into the board channel RAM list.

The Pci55xx Series has 16 channels of analog inputs with programmable gain that’s multiplexed to the 12

or 16-bit A/D converter and supported by 176 elements of channel list RAM. This allows the board to

access individual channels, with different Data Offset settings.

25.1 AL_SetDataOffsetList

Prototype C\C++

ERRNUM AL_SetDataOffsetList(LHLD lhld, LPDATAOFFSETLIST

lpDataOffsetlist);

Visual Basic for Windows

Function AL_SetDataOffsetList(ByVal lhld As Long, lpDataOffsetlist As

DATAOFFSETLIST) As Long

LHLD lhld handle of the LDSD

LPCHANLIST lpchanlist address of the user DATAOFFSET list structure

The AL_SetDataOffsetList function sets the DataOffset list settings in the LDSD. The DataOffset listing

is comprised of a channel number and DataOffset type. The DataOffset list may contain

Channel/DataOffset settings that are not currently set in the channel listing itself, only those channels

selected within the channel list will be set to the appropriate DataOffset type when running. The

DataOffset ID setting in the array can be obtained from the capabilities file.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

lpDataOffsetlist Specifies a 32 bit far pointer to a DATAOFFSET information structure. The

structure has been pre-defined in the ADLIB include file and is defined as

follows:

typedef struct tagDATAOFFSETLIST

{

long lType; /* 0 = Not Defined */

/* 1 = Use string list */

/* 2 = Use array of ints */

char achDataOffsetList[MAX_DATAOFFSET_STRLEN];

long lNumElements;

long alDataOffsetList[MAX_DATAOFFSET_LIST_ARRAYLEN];

}DATAOFFSET;

typedef DATAOFFSET FAR * LPDATAOFFSETLIST;

Returns:

On success ERRNUM is set to 1 and the information contained in the lpDataOffsetlist structure is

transferred to the LDSD, otherwise ERRNUM contains the last error code that occurred during the call.

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Measurement-computing ADLIB WIN Bedienungsanleitung Seite 111