fix wire requestFrom bugs

1. did not have default value for stopBit
2. did not use the 'address' parameter - instead relied on the _txAddress to be set in 'beginTransmission' but that is bad b/c you should be able to use 'requestFrom' completely independently

Author: oclyke

libraries/Wire/src/Wire.cpp

@@ -108,7 +108,7 @@ uint8_t TwoWire::requestFrom(uint8_t address, size_t quantity, bool stopBit)
 	_rxBuffer.clear();
 
 	am_hal_iom_transfer_t iomTransfer = {0};
-    iomTransfer.uPeerInfo.ui32I2CDevAddr = _txAddress; 
+    iomTransfer.uPeerInfo.ui32I2CDevAddr = address; 
     iomTransfer.ui32InstrLen = 0;           // 8-bit transfers
     iomTransfer.ui32Instr = 0;   // Offset;
     iomTransfer.ui32NumBytes = quantity;         // How many bytes to receive

libraries/Wire/src/Wire.h

@@ -47,7 +47,7 @@ class TwoWire : public Stream, public IOMaster {
     uint8_t endTransmission(bool stopBit);
     uint8_t endTransmission(void);
 
-    uint8_t requestFrom(uint8_t address, size_t quantity, bool stopBit);
+    uint8_t requestFrom(uint8_t address, size_t quantity, bool stopBit = true);
     uint8_t requestFrom(uint8_t address, size_t quantity);
 
     size_t write(uint8_t data);
@@ -77,7 +77,7 @@ class TwoWire : public Stream, public IOMaster {
 
 
     RingBufferN<AP3_WIRE_RX_BUFFER_LEN> _rxBuffer;// RX Buffer    
-    RingBufferN<AP3_WIRE_TX_BUFFER_LEN> _txBuffer;//TX buffer
+    RingBufferN<AP3_WIRE_TX_BUFFER_LEN> _txBuffer;// TX buffer
     uint8_t _linearBugger[AP3_WIRE_LINEAR_BUFFER_LEN]; // ToDo: choose a more efficient way to handle this
     uint8_t txAddress;