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Chapter 31 Input Configurations

24-1

24. INPUT CONFIGURATIONS

Input Configurations allows the random ordering of Differential, Single Ended or Pseudo Differential

channels 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 input configurations.

24.1 AL_SetInputConfigList

Prototype C\C++

ERRNUM AL_SetInputConfigList(LHLD lhld, LPINPUTCONFIGLIST lpInputConfiglist);

Visual Basic for Windows

Function AL_SetInputConfigList(ByVal lhld As Long, lpInputConfiglist As INPUTCONFIGLIST)

As Long

LHLD lhld handle of the LDSD

LPINPUTCONFIGLIST lpchanlist address of the user INPUTCONFIGLIST structure

The AL_SetInputConfigList function sets the InputConfig list settings in the LDSD. The INPUTCONFIG

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

Channel/InputConfig 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 InputConfig type when running. The

InputConfig ID setting in the array can be obtained from the capability file.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

lpInputConfiglist Specifies a 32 bit far pointer to a INPUTCONFIG information

structure. The structure has been pre-defined in the ADLIB include file

and is defined as follows:

typedef struct tagINPUTCONFIGLIST

{

long lType; /* 0 = Not Defined */

/* 1 = Use string list */

/* 2 = Use array of ints */

char achInputConfigList[MAX_INPUTCONFIG_STRLEN];

long lNumElements;

long alInputConfigList[MAX_INPUTCONFIG_LIST_ARRAYLEN];

}INPUTCONFIG;

typedef INPUTCONFIG FAR * LPINPUTCONFIGLIST;

Returns:

On success ERRNUM is set to 1 and the information contained in the lpInputConfiglist 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 Manuale Utente Pagina 105