DAQmxCreateCOPulseChanFreq

int32 DAQmxCreateCOPulseChanFreq (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 units, int32 idleState, float64 initialDelay, float64 freq, float64 dutyCycle);

Purpose

Creates channel(s) to generate digital pulses that freq and dutyCycle define and adds the channel to the task you specify with taskHandle. The pulses appear on the default output terminal of the counter unless you select a different output terminal.

Parameters

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
units	int32	The units in which to specify freq. Name Description DAQmx_Val_Hz hertz
idleState	int32	The resting state of the output terminal. Value Description DAQmx_Val_High High state. DAQmx_Val_Low Low state.
initialDelay	float64	The amount of time in seconds to wait before generating the first pulse.
freq	float64	The frequency at which to generate pulses.
dutyCycle	float64	The width of the pulse divided by the pulse period. NI-DAQmx uses this ratio, combined with frequency, to determine pulse width and the interval between pulses.

Return Value

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.