Digilent WaveForms Manual do Utilizador descarregar pdf (Página 53)

WaveForms™ SDK Reference Manual

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FDwfAnalogIOChannelInfo(HDWF hdwf, int idxChannel, int *pnNodes)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- pnNodes – Pointer to variable to return the number of node .

The function above returns the number of nodes associated with the specified channel.

FDwfAnalogIOChannelNodeName(

HDWF hdwf, int idxChannel, char szNodeName[32], char szUnits[16])

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- szNodeName – Pointer to character array to return the node name.

- szUnits – Pointer to character array to return the value units.

The function above returns the node name (“Voltage”, “Current”…) and units (“V”, “A”) for an Analog I/O node.

FDwfAnalogIOChannelNodeInfo(

HDWF hdwf, int idxChannel, int idxNode, ANALOGIO *panalogio)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- idxNode – Node index.

- panalogio – Pointer to variable to return the node type.

The function above returns the supported channel nodes. They are returned (by reference) as a bit field. This bit

field can be parsed using the IsBitSet Macro. Individual bits are defined using the ANALOGIO constants in dwf.h.

The acquisition mode selects one of the following modes, ANALOGIO:

ANALOGIO Modes

ANALOGIO Mode Functions

analogioEnable

Enable I/O node; used to enable a power supply, reference voltage, etc.

analogioVoltage

Voltage I/O node; used to input/output voltage levels.

analogioCurrent

Current I/O node; used to input/output current levels.

analogioTemperature

Temperature I/O node; used to retrieve read values from a temperature sensor.

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Digilent WaveForms Manual do Utilizador Página 53