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USB DrDAQ Programmer's Guide 9
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3.5
USB DrDAQ Routines
3.5.1
Summary
The following table explains each of the driver routines supplied with the USB DrDAQ
data logger:
Routine Description
UsbDrDaqOpenUnit open and enumerate the unit
UsbDrDaqCloseUnit close the unit
UsbDrDaqGetUnitInfo return various items of information about the
unit
UsbDrDaqRun tell the unit to start capturing data
UsbDrDaqReady indicate when UsbDrDaqRun has captured
data
UsbDrDaqStop abort data collection
UsbDrDaqSetInterval set the sampling speed of the unit
UsbDrDaqSetTrigger set the trigger on the unit
UsbDrDaqGetValues get a number of sample values after a run
UsbDrDaqGetTriggerTimeOffsetNs returns the time between the trigger point and
the first post-trigger sample
UsbDrDaqGetSingle get a single value from a specified channel
UsbDrDaqOpenUnitAsync open the unit without waiting for completion
UsbDrDaqOpenUnitProgress report progress of UsbDrDaqOpenUnitAsync
UsbDrDaqGetScalings discover the scalings, both built-in and custom,
that are available
UsbDrDaqSetScalings sets the scaling for a particular channel
UsbDrDaqSetSigGenBuiltIn sets the arbitrary waveform generator using
standard waveform types
UsbDrDaqSetSigGenArbitrary allows full control of the arbitrary waveform
generator
UsbDrDaqStopSigGen turns the AWG off
UsbDrDaqSetDO control the digital outputs on the unit
UsbDrDaqSetPWM used to configure the general-purpose I/Os as
pulse-width modulation outputs
UsbDrDaqGetInput used to configure the general-purpose I/Os as
digital inputs
UsbDrDaqStartPulseCount used to configure the general-purpose I/Os for
pulse counting and to start counting
UsbDrDaqGetPulseCount will return the current pulse count
UsbDrDaqEnableRGBLED enables or disables RGB mode on the LED
UsbDrDaqSetRGBLED used to set the colour of the LED once RGB
mode has been enabled
UsbDrDaqGetChannelInfo returns a set of information about the currently
selected scaling for the specified channel
The driver allows you to do the following:
Identify and open the logger
Take a single reading from a particular channel
Collect a block of samples at fixed time intervals from one or more channels
Set up a trigger event for a particular channel
Get information about scalings available for a channel
Select a scaling for a channel
Control and read general-purpose I/Os
Control arbitrary waveform generator
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