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WIA_IPS_FEEDER_CONTROL

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The WIA_IPS_FEEDER_CONTROL property is used to configure manual control over the feeder motor. The WIA minidriver creates and maintains this property.

Property Type: VT_I4

Valid Values: WIA_PROP_LIST

Access Rights: Read/Write

Remarks

The following table describes the valid values for the WIA_IPS_FEEDER_CONTROL property.

Value Definition
WIA_FEEDER_CONTROL_AUTO The device controls the feeder motor operation. The feeder is started and stopped for each scan job IWiaMiniDrv::drvAcquireItemData& call. This is the required default value if the property is supported.
WIA_FEEDER_CONTROL_MANUAL The application controls the feeder motor operation. The feeder is started when the WIA minidriver receives a WIA_COMMAND_START_FEEDER command request and stopped when the WIA minidriver receives a WIA_COMMAND_STOP_FEEDER command request.

When the device supports this feature, the WIA application can use it to start the feeder motor before executing the first scan job (the first IWiaTransfer::Download call) and stop the feeder after the last scan job (the last IWiaTransfer::Download call in the current WIA application session) is complete. Between the individual jobs (IWiaTransfer::Download calls), the feeder is kept to its operating speed and is ready to continue the next job without delay.

If the WIA minidriver receives an IWiaMiniDrv::drvAcquireItemData request while WIA_FEEDER_CONTROL_MANUAL is set and without receiving a WIA_COMMAND_START_FEEDER command, the WIA minidriver must revert to WIA_FEEDER_COMMAND_AUTO before executing the scan job.

If WIA_FEEDER_CONTROL_MANUAL is set and the WIA minidriver receives a IWiaMiniDrv::drvUnInitializeWia request without receiving a WIA_COMMAND_STOP_FEEDER command, the WIA minidriver must stop the feeder before returning to the call.

This property is valid only for the Feeder item (WIA_CATEGORY_FEEDER) and is optional.

Requirements

Header: wiadef.h (include Wiadef.h)