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NI-DAQmx Base 3.x C Function Reference Help
Conventions
Related Documentation
Key Concepts
Clocks
Terminal Names
Task Configuration/Control
DAQmxBaseClearTask
DAQmxBaseCreateTask
DAQmxBaseIsTaskDone
DAQmxBaseLoadTask
DAQmxBaseResetDevice
DAQmxBaseStartTask
DAQmxBaseStopTask
Channel Configuration/Creation
Create Analog Input Channels
DAQmxBaseCreateAIThrmcplChan
DAQmxBaseCreateAIVoltageChan
Create Analog Output Channel
DAQmxBaseCreateAOVoltageChan
Create Digital Input Channels
DAQmxBaseCreateDIChan
Create Digital Output Channels
DAQmxBaseCreateDOChan
Create Counter Input Channels
DAQmxBaseCreateCIPeriodChan
DAQmxBaseCreateCICountEdgesChan
DAQmxBaseCreateCIPulseWidthChan
Position
DAQmxBaseCreateCILinEncoderChan
DAQmxBaseCreateCIAngEncoderChan
Create Counter Output Channels
DAQmxBaseCreateCOPulseChanFreq
Timing
DAQmxBaseCfgSampClkTiming
DAQmxBaseCfgImplicitTiming
Triggering
Start Trigger
DAQmxBaseDisableStartTrig
DAQmxBaseCfgDigEdgeStartTrig
DAQmxBaseCfgAnlgEdgeStartTrig
Reference Trigger
DAQmxBaseCfgAnlgEdgeRefTrig
DAQmxBaseCfgDigEdgeRefTrig
DAQmxBaseDisableRefTrig
Read Functions
DAQmxBaseReadAnalogF64
DAQmxBaseReadBinaryI16
DAQmxBaseReadCounterF64
DAQmxBaseReadCounterScalarF64
DAQmxBaseReadCounterScalarU32
DAQmxBaseReadCounterU32
DAQmxBaseReadDigitalScalarU32
DAQmxBaseReadDigitalU32
DAQmxBaseReadDigitalU8
Write Functions
DAQmxBaseWriteAnalogF64
DAQmxBaseWriteDigitalU8
DAQmxBaseWriteDigitalU32
DAQmxBaseWriteDigitalScalarU32
Export HW Signals
DAQmxBaseExportSignal
Internal Buffer Configuration
DAQmxBaseCfgInputBuffer
Error Handling
DAQmxBaseGetExtendedErrorInfo
Glossary
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WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
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DAQmxBaseCreateDIChan

int32 DAQmxBaseCreateDIChan (TaskHandle taskHandle, const char lines[ ], const char nameToAssignToLines[ ], int32 lineGrouping);

Purpose

Creates channel(s) to measure digital signals and adds the channel(s) to the task you specify with taskHandle. For some devices (such as E Series), NI-DAQmx Base supports grouping the digital lines of a port as single channel, not multiple channels.

Parameters

Input
Name Type Description
taskHandle TaskHandle The task to which to add the channels that this function creates.
lines const char [ ] The names of the digital lines used to create a virtual channel. You can specify a list or range of lines such as the following: Dev1/port0:1 or Dev1/port0,Dev1/port2 or Dev1/port0/line0:4
nameToAssignToLines const char [ ] Pass NULL for this parameter. NI-DAQmx Base currently ignores this parameter.
lineGrouping int32 Always pass DAQmx_Val_ChanForAllLines.
Value Description
DAQmx_Val_ChanForAllLines One channel for all lines

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.
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