WriteSPIDAC Method

Beta Innovations USB SDK .NET/COM

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Writes contents of iDataBuffer to SPI compatible peripherals or DACs on the port specified by inPort. This function can be used on modules supporting either DACs or SPI ports.

Namespace:  BIUSBWrapper
Assembly:  BIUSBWrapper (in BIUSBWrapper.dll)

Syntax

Visual Basic (Declaration)
Public Shared Function WriteSPIDAC ( _
	ByRef iDeviceList As DeviceParam, _
	inPort As Byte, _
	ByRef iDataBuffer As DAC_OUTPUTS, _
	inLevel As Byte _
) As Integer
C#
public static int WriteSPIDAC(
	ref DeviceParam iDeviceList,
	byte inPort,
	ref DAC_OUTPUTS iDataBuffer,
	byte inLevel
)

Parameters

iDeviceList
Type: BIUSBWrapper..::.DeviceParam %
A DeviceParam structure. Must contain valid device information returned from call to DetectHID.
inPort
Type: System..::.Byte
Zero based index of output Port to write to.
iDataBuffer
Type: BIUSBWrapper..::.DAC_OUTPUTS %
DAC_OUTPUTS structure containing data to write to the port specified by the inPort parameter. A port supporting 10 DAC or SPI outputs will require a 40-byte buffer, each 32 bits long word corresponding to the data to be written to the corresponding DAC/SPI output. Note that all SPI/DACs on a port are written to at the same time. Writing to a single SPI/DAC is not possible; therefore SPI/DAC buffer data must be updated in iDataBuffer for all SPI/DACs on the specified port.

Actual data length output on a corresponding SPI/DAC channel is determined by the module's capability, not the maximum word length of 32 bits per channel as defined in the DAC_OUTPUTS structure.

inLevel
Type: System..::.Byte
Output level range from 0 to 7. This value sets the pulse width of the backlight if supported.

Return Value

0: If failure writing to device.

>0: if success, returns number of bytes written to device.

See Also

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