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Chapter 16 Logical Device Transfer Methods

15-2

15.2 AL_GetDataTransferMethod

Prototype C\C++

ERRNUM AL_GetDataTransferMethod(LHLD lhld, LPSTR lpstrMethod, long

lMaxLen);

Visual Basic for Windows

Function AL_GetDataTransferMethod(ByVal lhld As Long,

ByVal lpstrMethod As String,

ByVal lLength As Long) As Long

LHLD lhld handle of the LDSD

LPSTR lpstrMode destination address of the transfer method string

long lMaxLength the count in bytes to be copied

The AL_GetDataTransferMethod function retrieves the data transfer method of the LDSD.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

lpstrMode Points to the destination string for the copy.

lMaxLength Maximum length in bytes to be copied to the user string , including the NULL

termination character.

Returns:

On success ERRNUM is set to 1 and destination string lpstrMethod is set to either

AL_DTM_SOFTWARE, AL_DTM_DMA, AL_DTM_IRQ or AL_DTM_C40PORT as defined in the

ADLIB include file, otherwise ERRNUM contains the last error code that occurred during the call and the

destination string is considered invalid.

Related Functions:

AL_SetDataTransferMethod

Supported Logical Device Subsystems:

Pci55xx Series: CTR0, CTR1, CTR2, CTR3

Note that CTR0, CTR1 Counters are referenced in the user manual as CNTR0/1 and

Timers CTR2, CTR3 are referenced in the user manual as TMR0/1.

Pci55xx Series: DIN0 to DIN3, DOT0 to DOT3

Pci55xx Series: ADC0, DAC0, DAC1

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Measurement-computing ADLIB WIN Manual do Utilizador Página 60