Measurement-computing Data Acquisition Systems rev.10.4 Bedienungsanleitung PDF herunterladen (Seite 191)

Function Usage

The term waveform/pattern output is used extensively throughout the entries for the

functions of the form

daqDac…. This refers to an analog waveform output modes and/or

digital pattern output modes. These terms describe output to digital-to-analog converter

(DAC) channels and/or digital input/output (DIO) channels that are synchronously

updated by a clock source defined by the application.

The waveform/pattern output transfer will be performed from the waveform/pattern output buffer configured

using the daqDacWaveSetBuffer function to the device’s internal output FIFO. This transfer will continue

until:

• The entire waveform/pattern output buffer has been transferred to the internal output FIFO on the

device.

• The transfer is halted (with the daqDacTransferStop function).

• The waveform/pattern output is disarmed (with the daqDacWaveDisarm function).

The waveform output can be specified for any DAC channel or the 16-bit DIO channel located on the P3 port,

However, the transfer is initiated for all channels configured for dynamic waveform/pattern output mode

(

DdomDynamicWave). The daqDacSetOutputMode function should be used to set the output mode to

DdomDynamicWave prior to calling this function.

This function should be used only with waveform/pattern output modes.

Prototypes

C/C++

daqDacTransferStart(DaqHandleT handle, DaqDacDeviceType deviceType, DWORD

chan);

Visual BASIC

VBdaqDacTransferStart&(ByVal handle&, ByVal deviceType&, ByVal chan&)

Program References

None

Programmer’s Manual 908494 Daq API Command Reference 4.4-9

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Measurement-computing Data Acquisition Systems rev.10.4 Bedienungsanleitung Seite 191