Added end() to HardWire (I2C)

Author: rogerclarkmelbourne

STM32F1/libraries/Wire/HardWire.cpp

@@ -75,3 +75,8 @@ HardWire::~HardWire() {
 void HardWire::begin(uint8 self_addr) {
     i2c_master_enable(sel_hard, dev_flags);
 }
+
+void HardWire:end() {
+    i2c_disable(sel_hard);
+    sel_hard = 0;
+}

STM32F1/libraries/Wire/HardWire.h

@@ -59,6 +59,11 @@ class HardWire : public WireBase {
      * passed flags
      */
     HardWire(uint8, uint8 = 0);
+	
+	/*
+	 * Shuts down (disables) the hardware I2C
+	 */
+	void end();
 
     /*
      * Disables the I2C device and remove the device address.