Mint NextMove PCI Bedienungsanleitung PDF herunterladen (Seite 24)

5-4 Advanced Features

Timer event

To install a timer event handler the function installTimerEventEventHandler 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 timer events to be received. Passing

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

The period of the timer event can be set using the function setTimerEvent.

Digital input event

To install a digital input event handler the function installInputEventHandler 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 digital input events to be received.

Passing false will uninstall the event handler and prevent digital input events being generated or

received.

When the input event handler is called, it is passed two parameters, a bank number and a bit pattern of

activated inputs. In the case of NextMove PCI where each PCI card has a bank of I/O (the main board is

bank 0, the first expansion board is bank 1 and the second expansion card is bank 2) the expansion cards

are read sequentially. It is advisable to set up a mask of digital inputs that will generate events using the

function setIMask.

Comms location changed event

To install a comms event handler the function installCommsEventHandler 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 comms events to be received. Passing false will

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

When the comms event handler is called, it is passed a bit pattern indicating the changed comms.

Comms events will be generated when an external source modifies the contents of comms locations 1 to 5

using the function setComms. Only external access to the comms array will call the embedded comms

event handler. Calling the MML function setComms in an embedded application will not generate a call to

an embedded comms event handler.

DPR event

To install a DPR event handler the function installDPREventHandler 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 DPR events to be received. Passing false will

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

DPR events are generated by an application running on the controller calling the function doDPREvent.

This can be done in MintMT using the keyword DPREVENT. This function accepts a 16-bit code which is

passed to the DPR event handler running on the PC application.

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Mint NextMove PCI Bedienungsanleitung Seite 24