Added Wire.end() for bit banged version (TwoWire.cpp)

Author: rogerclarkmelbourne

STM32F1/libraries/Wire/Wire.cpp

@@ -184,6 +184,18 @@ void TwoWire::begin(uint8 self_addr) {
     set_sda(HIGH);
 }
 
+void TwoWire::end()
+{
+	if (this->scl_pin)
+	{
+		pinMode(this->scl_pin, INPUT);
+	}
+	if (this->sda_pin)
+	{
+		pinMode(this->sda_pin, INPUT);
+	}
+}
+
 TwoWire::~TwoWire() {
     this->scl_pin=0;
     this->sda_pin=0;

STM32F1/libraries/Wire/Wire.h

@@ -111,6 +111,10 @@ class TwoWire : public WireBase {
      * Shifts out the data through SDA and clocks SCL for the slave device
      */
     void i2c_shift_out(uint8);
+	
+	
+
+	
  protected:
     /*
      * Processes the incoming I2C message defined by WireBase
@@ -130,6 +134,11 @@ class TwoWire : public WireBase {
      */
     void begin(uint8 = 0x00);
 
+    /*
+     * Sets pins SDA and SCL to INPUT
+     */
+	void end();	
+	
     /*
      * If object is destroyed, set pin numbers to 0.
      */