add serial_flush() method to clean rx buffer

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@737 7ae35d74-ebe9-4afe-98af-79ac388436b8

src/serial.c

@@ -4,7 +4,7 @@
  *  Parts of the PTT handling are derived from soundmodem, an excellent
  *  ham packet softmodem written by Thomas Sailer, HB9JNX.
  *
- *		$Id: serial.c,v 1.18 2001-08-22 21:12:09 f4cfe Exp $
+ *		$Id: serial.c,v 1.19 2001-12-15 03:13:39 aa1vl Exp $
  *
  *   This library is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU Library General Public License as
@@ -475,6 +475,18 @@ int write_block(port_t *p, const char *txbuffer, size_t count)
   return RIG_OK;
 }
 
+/*
+ * Flush all characters waiting in RX buffer.
+ */
+
+int serial_flush( port_t *p )
+{
+  tcflush(p->fd, TCIFLUSH);
+
+  return RIG_OK;
+}
+
+
 /*
  * Read "num" bytes from "fd" and put results into
  * an array of unsigned char pointed to by "rxbuffer"

src/serial.h

@@ -2,7 +2,7 @@
  *  Hamlib Interface - serial communication header
  *  Copyright (c) 2000,2001 by Stephane Fillod and Frank Singleton
  *
- *		$Id: serial.h,v 1.11 2001-07-13 19:08:15 f4cfe Exp $
+ *		$Id: serial.h,v 1.12 2001-12-15 03:13:39 aa1vl Exp $
  *
  *   This library is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU Library General Public License as
@@ -27,7 +27,7 @@
 
 
 extern HAMLIB_EXPORT(int) serial_open(port_t *rs);
-
+extern HAMLIB_EXPORT(int) serial_flush(port_t *p);
 extern HAMLIB_EXPORT(int) read_block(port_t *p, char *rxbuffer, size_t count);
 extern HAMLIB_EXPORT(int) write_block(port_t *p, const char *txbuffer, size_t count);
 extern HAMLIB_EXPORT(int) fread_block(port_t *p, char *rxbuffer, size_t count);