- introduced initRS232Finished and initRS232WithFlags

- allow empty terminator in readRS232TillTerm

rs232controller.w

@@ -69,6 +69,8 @@ The following interface functions are provided:
                                              int errorBufferLen);
 	int getRS232Timeout(prs232 self);
         int initRS232(prs232 self);
+        int initRS232WithFlags(prs232 self, int flags);
+        int initRS232Finished(prs232 self);
 	void closeRS232(prs232 self);
         prs232 createRS232(char *host, int iPort);
 	void KillRS232(void *pData);
@@ -103,6 +105,12 @@ directly followed by a read.
  iCode.
 \item[initRS232] tries to close and reopen the RS232 connection. This is 
  useful for the automatic fixing of communication problems encountered.
+\item[initRS232WithFlags] the same as initRS232, but with flags. flags = 1:
+ do not block on connect (use initRS232Finished to check success).
+ flags=2: wait 1000 ms after last close or restart (workaround for a bug
+ in Lantronix terminal server). flags=3: both options. flags=0: no opitons.
+\item[initRS232Finished] returns 0 when connect in progress, 1 when finished,
+ FAILEDCONNECT on failure.
 \item[closeRS232] closes a network connection but does not delete the datastructure.
 \item[createRS232] creates a new rs232 data structure with all
 parameters at  default values. The connection is NOT opened.