Extended timeouts, txStandBy changes

- For use in noisy or low signal scenarios
- Allows user specified timeout period of extended duration
- Modified txStandBy() and writeBlocking() functions to rely on a user
defined timeout period, automatic retries and payload reUse

examples/TransferTimeouts/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__