refactor(i2c): simplify constructor

Signed-off-by: Frederic Pillon <[email protected]>

Author: fpistm

Diff for: libraries/Wire/src/Wire.cpp

@@ -33,18 +33,6 @@ static const uint8_t MASTER_ADDRESS = 0x01;
 
 // Constructors ////////////////////////////////////////////////////////////////
 
-TwoWire::TwoWire()
-{
-  memset((void *)&_i2c, 0, sizeof(_i2c));
-  _i2c.sda = digitalPinToPinName(SDA);
-  _i2c.scl = digitalPinToPinName(SCL);
-
-  txBuffer = nullptr;
-  txBufferAllocated = 0;
-  rxBuffer = nullptr;
-  rxBufferAllocated = 0;
-}
-
 TwoWire::TwoWire(uint32_t sda, uint32_t scl)
 {
   memset((void *)&_i2c, 0, sizeof(_i2c));

Diff for: libraries/Wire/src/Wire.h

@@ -76,8 +76,7 @@ class TwoWire : public Stream {
     void recoverBus(void);
 
   public:
-    TwoWire();
-    TwoWire(uint32_t sda, uint32_t scl);
+    TwoWire(uint32_t sda = SDA, uint32_t scl = SCL);
     ~TwoWire();
     // setSCL/SDA have to be called before begin()
     void setSCL(uint32_t scl)