Measurement Computing ADLIB WIN - Manual (Page 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.