Measurement-computing ADLIB WIN Instrukcja Użytkownika Pobierz pdf (Strona 120)

Chapter 39 Counter / Timer

26-2

26.4 AL_CounterOut

Prototype C\C++

ERRNUM AL_CounterOut(LHLD lhld, double dRate, long lUnits);

Visual Basic for Windows

Function AL_CounterOut(ByVal lhld As Long, ByVal dRate As Double,

ByVal lUnits As Long) As Long

LHLD lhld handle of the LDSD

double dRate specifies the rate of the Counter Output port

long lUnits specifies the rate units

After the Timer has been initialized, The AL_CounterOut function immedialetly sets the hardware

Counter Output port of the LDSD to the specified rate. Subsequent calls to AL_CounterOut will update

the output rate as specified.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

dRate Specifies the rate at which a Counter Output will occur.

lUnits Sets the units in which the above rate parameter is specified. The available

settings are defined as AL_HERTZ or AL_TICS in the ADLIB include file.

Returns:

On success ERRNUM is set to 1, otherwise ERRNUM contains the last error code that occurred during the

call.

Related Functions:

AL_SetCtrMode

AL_GetCtrMode

Supported Logical Device Subsystems:

Pci55xx Series: CTR2, CTR3, Options: 7.7 to 500000

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

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Measurement-computing ADLIB WIN Instrukcja Użytkownika Strona 120