DigitalSingleChannelReader.ReadMultiSamplePortByte Method
- 更新时间2023-02-21
- 阅读时长1分钟
Reads one or more 8-bit unsigned integer samples from a single DIChannel in a task.
Namespace: NationalInstruments.DAQmx
Assembly: NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.45.49302
Syntax
public byte[] ReadMultiSamplePortByte( int numberOfSamples )
Public Function ReadMultiSamplePortByte ( numberOfSamples As Integer ) As Byte()
Parameters
- numberOfSamples
- Type: SystemInt32
The number of samples to read. If you set numberOfSamples to -1 for a continuous acquisition, the read retrieves all samples available in the buffer at the time of the read. If you set numberOfSamples to -1 for a finite acquisition, the read behavior is set by the ReadAllAvailableSamples property of the DaqStream you are reading from.
Return Value
Type: ByteA 1D array of 8-bit unsigned integer samples from the task. Each element in the array corresponds to a sample from the task.
Exceptions
| Exception | Condition |
|---|---|
| DaqException | The NI-DAQmx driver returned an error. |
| OutOfMemoryException | There is not enough memory to carry out this operation. |
Remarks
Use this method for devices with up to eight lines per port.
NI-DAQmx read and write methods time out after the amount of time specified by the Timeout property on the task you are reading from or writing to.
Refer to NI-DAQmx Readers and Writers for more information about memory limitations in NI-DAQmx read methods.