Specify the callback function to execute when the CD, CTS, DSR, or RI pins change state
You configure PinStatusFcn to execute a callback function when a pin status event occurs. A pin status event occurs when the Carrier Detect (CD), Clear to Send (CTS), Data Set Ready (DSR) or Ring Indicator (RI) pin changes state. A serial port pin changes state when it is asserted or unasserted. Information about the state of these pins is recorded in the PinStatus property.
If the RecordStatus property value is on, and a pin status event occurs, the record file records this information:
The event type as PinStatus
The pin that changed its state, and the pin state as either on or off
The time the event occurred using the format day-month-year hour:minute:second:millisecond
To learn how to create a callback function, see Creating and Executing Callback Functions.