DAQmxCfgDigEdgeStartTrig

NI-DAQmx C Functions

DAQmxCfgDigEdgeStartTrig

int32 DAQmxCfgDigEdgeStartTrig (TaskHandle taskHandle, const char triggerSource[], int32 triggerEdge);

Purpose

Configures the task to start acquiring or generating samples on a rising or falling edge of a digital signal.

Parameters

Input
Name Type Description
taskHandle TaskHandle The task used in this function.
triggerSource const char [] The name of a terminal where there is a digital signal to use as the source of the trigger.
triggerEdge int32 Specifies on which edge of a digital signal to start acquiring or generating samples.
Value Description
DAQmx_Val_Rising Rising edge(s).
DAQmx_Val_Falling Falling edge(s).

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.