navMessageReceive (Functionblock)

navMessageReceive returns a text message received from the navigation device.

If the navigation device supports API level 2, additional information can be received with navMessageReceiveX.

Note that the text message is only valid after a "message received" event is raised; the event will be removed when this function block is called.

A "message received" event is raised when the user writes a text message or sends a quick message.

Input:

None.

Output:

time : DINT

The timestamp when the text message was sent from the navigation device.

message : STRING

The received text message.

ready : BOOL

Declaration:

FUNCTION_BLOCK navMessageReceive;
VAR_OUTPUT
  time   : DINT;
  message : STRING;
  ready   : BOOL;
END_VAR;

Example:

INCLUDE rtcu.inc
 
VAR
  msgRcv : navMessageReceive;
END_VAR;
 
FUNCTION ReadMessage;
  msgRcv();
  IF msgRcv.ready THEN
    DebugMsg(message := "*** message received ***");
    DebugFmt(message := "-time=\4", v4 := msgRcv.time);
    DebugMsg(message := "-text=" + msgRcv.message);
END_IF;
END_FUNCTION;
 
THREAD_BLOCK navMonitor;
VAR
  event : INT := 0;
END_VAR;
 
WHILE event <> -1 DO
  event := navWaitEvent(timeout := -1);
  CASE event OF
     ...
    2: ReadMessage();
     ...
  END_CASE;
END_WHILE;
END_THREAD_BLOCK;