Mint NextMove PCI Bedienungsanleitung PDF herunterladen (Seite 22)

5-2 Advanced Features

Priority Event Supported By

11 Axis Idle NextMove PCI

12: Lowest Unknown NextMove PCI

The Reset event only available on NextMove PCI. It is not generated by the controller but by the device

driver and is not subject to the priority scheme.

In order for the user to be informed of an event, a handler must be installed. Event handlers may be

installed in applications running on the controller (MintMT) and applications running on the PC. If both an

embedded handler (MintMT or an embedded application) and a PC handler are installed then only the

handler on the controller (MintMT or embedded) will be called.

When an event occurs and the appropriate handler is installed the handler is called. A higher priority event

will interrupt a lower priority event. If multiple events occur within 2ms, then the above priority system will

be used to decide which event to call.

5.1.1 Installing ActiveX event handlers

The events listed above will appear as part of the MintMT Controller object when the MintMT ActiveX

control has been included in the project. Within the development environment being used, code can be

added to an event handler. This code will be called when the controller generates an event of a specific

type.

In order for the ActiveX control to receive events both the device driver and the controller must be told for

which events handlers exist. This is done using an installXXXXhandler function. These functions are

passed a boolean value, either true to install the event handler or false to uninstall the event handler.

Once the handler has been installed the event will get generated by the controller, this will interrupt the

PC. The device driver will catch the interrupt and set an event in the ActiveX control. This event will then

call the event handler code in the PC application.

Serial Receive

To install a serial receive event handler the function installSerialReceiveEventHandler must be

called to install the event handler with the device driver and the controller. This function accepts a single

boolean parameter. Passing true will register the event handler and allow error events to be received.

Passing false will uninstall the event handler and prevent error events being generated or received.

When a character is transmitted from the controller to the PC a serial receive interrupt is generated. This

event is used by the output window in WorkBench v5. Installing a serial receive event handler in another

PC application will disable the output window in WorkBench v5.

Error event

To install an error event handler the function installErrorEventHandler must be called to install the

event handler with the device driver and the controller. This function accepts a single boolean parameter.

Passing true will install the event handler and allow error events to be received. Passing false will

uninstall the event handler and prevent error events being generated or received.

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Mint NextMove PCI Bedienungsanleitung Seite 22