WIA_IPS_FEEDER_CONTROL
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)