Move buffers for Wire library to DCCM area

Author: bigdinotech

libraries/Wire/src/Wire.cpp

@@ -33,7 +33,8 @@ TwoWire::TwoWire(I2C_CONTROLLER _controller_id)
     : rxBufferIndex(0), rxBufferLength(0), init_status(-1),
       controller_id(_controller_id)
 {
-    // Empty
+    rxBuffer = (uint8_t*)dccm_malloc(BUFFER_LENGTH);
+    txBuffer = (uint8_t*)dccm_malloc(BUFFER_LENGTH);
 }
 
 void TwoWire::begin(void)

libraries/Wire/src/Wire.h

@@ -58,13 +58,13 @@ class TwoWire : public Stream {
 
 private:
 	// RX Buffer
-	uint8_t rxBuffer[BUFFER_LENGTH];
+	uint8_t *rxBuffer;
 	uint8_t rxBufferIndex;
 	uint8_t rxBufferLength;
 
 	// TX Buffer
 	uint8_t txAddress;
-	uint8_t txBuffer[BUFFER_LENGTH];
+	uint8_t *txBuffer;
 	uint8_t txBufferLength;
 
 	int init_status;