DAQmxCfgChangeDetectionTiming
int32 DAQmxCfgChangeDetectionTiming (TaskHandle taskHandle, const char risingEdgeChan[], const char fallingEdgeChan[], int32 sampleMode, uInt64 sampsPerChan);
Purpose
Configures the task to acquire samples on the rising and/or falling edges of the lines or ports you specify.
Parameters
|
Input
|
| Name |
Type |
Description |
|
taskHandle
|
TaskHandle |
The task used in this function. |
|
risingEdgeChan
|
const char [] |
The names of the digital lines or ports on which to detect rising edges. You can specify a list or range of channels. |
|
fallingEdgeChan
|
const char [] |
The names of the digital lines or ports on which to detect falling edges. You can specify a list or range of channels. |
|
sampleMode
|
int32 |
Specifies whether the task acquires samples continuously or if it acquires a finite number of samples.
| Value |
|
Description |
|
DAQmx_Val_FiniteSamps
|
|
Acquire or generate a finite number of samples. |
|
DAQmx_Val_ContSamps
|
|
Acquire or generate samples until you stop the task. |
|
DAQmx_Val_HWTimedSinglePoint
|
|
Acquire or generate samples continuously using hardware timing without a buffer. Hardware timed single point sample mode is supported only for the sample clock and change detection timing types. |
|
|
sampsPerChan
|
uInt64 |
The number of samples to acquire from each channel if sampleMode is DAQmx_Val_FiniteSamps. If sampleMode is DAQmx_Val_ContSamps, NI-DAQmx uses this value to determine the buffer size. |
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. |