User manual MATLAB DATA ACQUISITION TOOLBOX QUICK REFERENCE GUIDE

[. . . ] The rules associated with configuring properties include · Property names are not case sensitive. · set(ai) returns all settable properties for ai, while set(ai. Channel(index)) returns all settable properties for the specified channel. · get(ai) returns the current property values for ai, while get(ai. Channel(index)) returns the current property values for the specified channel. Advantech® Measurement ComputingTM National Instruments® Parallel port Microsoft® Windows® sound card For example, to create the analog input object ai for a sound card: ai = analoginput('winsound'); 2 Property Types Toolbox properties are divided into these two main types: · Common properties that apply to every channel or line contained by a device object · Channel/line properties that you can configure for individual channels or lines Common and channel/line properties are divided into these two types: · Base properties that apply to all supported hardware subsystems of a given type (AI, AO, DIO) · Device-specific properties that apply to the specific hardware you are using set and get display the base properties followed by the Issuing a Trigger To log data to the engine or a disk file (AI), or to output data from the engine (AO), a trigger must occur. The trigger types supported for all hardware are given below. Trigger Type Immediate Description The trigger occurs just after you issue start. [. . . ] Configure and return the specified property. Executing the Object start stop trigger wait AI AO DIO Start a device object. Wait for the device object to stop running. Working with Data flushdata getdata getsample getvalue peekdata putdata AI AO DIO Remove data from the data acquisition engine. Extract data, time, and event information from the data acquisition engine. Queue data in the engine for eventual output. 6 Working with Data putsample putvalue AI AO DIO Immediately output one sample. Write values to lines. Getting Information and Help daqhelp AI AO DIO Display help for device objects, constructors, adaptors, functions, and properties. Return property characteristics for device objects, channels, or lines. daqhwinfo propinfo General Purpose binvec2dec clear daqcallback daqfind AI AO DIO Convert binary vector to decimal value. A callback function that displays event information for the specified event. Return device objects, channels, or lines from the data acquisition engine to the MATLAB workspace. Specify that the hardware device starts when a manual trigger is issued. Specify the M-file callback function to execute when a trigger occurs. Specify the condition that must be satisfied before a trigger executes. Specify one or more voltage values that must be satisfied before a trigger executes. Specify the type of trigger to execute. 8 Analog Input Status Properties Logging Running SamplesAcquired SamplesAvailable Indicate whether data is being logged to memory or to a disk file. Indicate the number of samples available per channel in the engine. Analog Input Hardware Configuration Properties ChannelSkew ChannelSkewMode ClockSource InputType SampleRate Specify the time between consecutive scanned hardware channels. Specify the per-channel rate at which analog data is converted to digital data. Analog Input Callback Properties DataMissedFcn InputOverRangeFcn Specify the M-file callback function to execute when data is missed. Specify the M-file callback function to execute when acquired data exceeds the valid hardware range. Specify the M-file callback function to execute when a run-time error occurs. Specify the M-file callback function to execute every time a predefined number of samples is acquired for each channel group member. Specify the number of samples to acquire for each channel group member before a samples acquired event is generated. Specify the M-file callback function to execute just before the device object starts running. Specify the M-file callback function to execute just after the device object stops running. Specify the M-file callback function to execute whenever a predefined period of time passes. [. . . ] Store data that you want to associate with a device object. 12 Channel Properties Analog Output Channel Properties ChannelName DefaultChannel Value HwChannel Index NativeOffset NativeScaling OutputRange Parent Type Units UnitsRange Specify a descriptive channel name. Indicate the offset to use when converting between the native data format and doubles. Indicate the scaling to use when converting between the native data format and doubles. Specify the range of data as engineering units. 13 Digital I/O Base Properties Digital I/O base properties are divided into two main categories: common properties and line properties. [. . . ]