From a984b581a8ad093b55ec9f2d4677afdd77bf4705 Mon Sep 17 00:00:00 2001
From: Zach Eveland <zeveland@blacklabel-development.com>
Date: Sun, 1 Apr 2012 12:54:35 -0400
Subject: added Boolean operators to HardwareSerial and CDC to test whether the
 port is ready to send data.

Mostly useful for Leonardo - simple way to test whether the port is actually opened by an application and ready to receive data.  For Serial objects attached to real UARTs always returns true.
---
 cores/arduino/HardwareSerial.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'cores/arduino/HardwareSerial.cpp')

diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp
index 9985b78..f40ddee 100644
--- a/cores/arduino/HardwareSerial.cpp
+++ b/cores/arduino/HardwareSerial.cpp
@@ -398,6 +398,10 @@ size_t HardwareSerial::write(uint8_t c)
   return 1;
 }
 
+HardwareSerial::operator bool() {
+	return true;
+}
+
 // Preinstantiate Objects //////////////////////////////////////////////////////
 
 #if defined(UBRRH) && defined(UBRRL)
-- 
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