From 702b07d03c03cfc6c4f312ac88caf033c650bbef Mon Sep 17 00:00:00 2001
From: Kristian Lauszus <lauszus@gmail.com>
Date: Tue, 9 Oct 2012 20:41:47 +0200
Subject: [PATCH] Added flush()

---
 SPP.cpp | 2 ++
 SPP.h   | 1 +
 2 files changed, 3 insertions(+)

diff --git a/SPP.cpp b/SPP.cpp
index 08ca0241..c6b4b8ca 100644
--- a/SPP.cpp
+++ b/SPP.cpp
@@ -823,6 +823,8 @@ void SPP::printNumberln(uint16_t n) {
 }
 
 uint8_t SPP::read() {
+    if(rfcommAvailable == 0) // Don't read if there is nothing in the buffer
+        return 0;
     uint8_t output = rfcommDataBuffer[0];
     for(uint8_t i = 1; i < rfcommAvailable; i++)
         rfcommDataBuffer[i-1] = rfcommDataBuffer[i]; // Shift the buffer one left
diff --git a/SPP.h b/SPP.h
index f6fc97ec..bdddb566 100644
--- a/SPP.h
+++ b/SPP.h
@@ -120,6 +120,7 @@ public:
     
     uint8_t available() { return rfcommAvailable; }; // Get the bytes waiting to be read
     uint8_t read(); // Used to read the buffer
+    void flush() { rfcommAvailable = 0; }; // Discard all the bytes in the buffer
     
 private:
     /* Bluetooth dongle library pointer */