A DLN adapter generates the
DLN_GPIO_EVENT_CHANGE events each time the level on the input pin changes.
Use the DlnGpioPinSetEventCfg()function to configure events. Pass
DLN_GPIO_EVENT_CHANGE for the
eventPeriod parameter is zero, the DLN adapter generates single events when the level on the input pin changes.
eventPeriod is non-zero, the DLN adapter resents the events periodically with the
eventPeriod interval while the level on the pin remains unchanged (a series of events).
A series of e vents begins when the level on the GPIO line changes. At this moment, the DLN adapter sends the first event in the series. The
eventCount field of the first event is set to zero and the
value field contains the actual value on the GPIO line. Then, while the level on the GPIO line remains unchanged, the DLN adapter repeatedly sends events with the same value in the
value field. The interval between recurring events is equal to
eventPeriod milliseconds. The
eventCount field increments for each event in the series. You can use this field to calculate the time passed from the last level change (time = eventCount * eventPeriod).When the level on the GPIO line changes, a new series of events begins. The
eventCount field is reset to zero and the
value field is set to the actual value present on the line after the change.