Merge pull request #413 from cHemingway/fix_portenta_i2c_count

Add 3rd I2C bus for Arduino Portenta H7, Fixes #332

Author: facchinm

libraries/Wire/Wire.cpp

@@ -188,4 +188,7 @@ arduino::MbedI2C Wire(I2C_SDA, I2C_SCL);
 #endif
 #if WIRE_HOWMANY > 1
 arduino::MbedI2C Wire1(I2C_SDA1, I2C_SCL1);
+#endif
+#if WIRE_HOWMANY > 2
+arduino::MbedI2C Wire2(I2C_SDA2, I2C_SCL2);
 #endif

libraries/Wire/Wire.h

@@ -95,5 +95,8 @@ extern arduino::MbedI2C Wire;
 #if WIRE_HOWMANY > 1
 extern arduino::MbedI2C Wire1;
 #endif
+#if WIRE_HOWMANY > 2
+extern arduino::MbedI2C Wire2;
+#endif
 
 typedef arduino::MbedI2C TwoWire;

variants/PORTENTA_H7_M4/pins_arduino.h

@@ -115,7 +115,7 @@ static const uint8_t SCK  = PIN_SPI_SCK;
 uint8_t getUniqueSerialNumber(uint8_t* name);
 void _ontouch1200bps_();
 
-#define WIRE_HOWMANY		2
+#define WIRE_HOWMANY		3
 
 #define I2C_SDA				(digitalPinToPinName(PIN_WIRE_SDA))
 #define I2C_SCL				(digitalPinToPinName(PIN_WIRE_SCL))
@@ -124,6 +124,8 @@ void _ontouch1200bps_();
 #define I2C_SCL_INTERNAL	(PB_6)
 #define I2C_SDA1			I2C_SDA_INTERNAL
 #define I2C_SCL1			I2C_SCL_INTERNAL
+#define I2C_SDA2			(PH_12)
+#define I2C_SCL2			(PH_11)
 
 #define SPI_HOWMANY			1
 

variants/PORTENTA_H7_M7/pins_arduino.h

@@ -122,7 +122,7 @@ static const uint8_t SCK  = PIN_SPI_SCK;
 uint8_t getUniqueSerialNumber(uint8_t* name);
 void _ontouch1200bps_();
 
-#define WIRE_HOWMANY		2
+#define WIRE_HOWMANY		3
 
 #define I2C_SDA				(digitalPinToPinName(PIN_WIRE_SDA))
 #define I2C_SCL				(digitalPinToPinName(PIN_WIRE_SCL))
@@ -131,6 +131,8 @@ void _ontouch1200bps_();
 #define I2C_SCL_INTERNAL	(PB_6)
 #define I2C_SDA1			I2C_SDA_INTERNAL
 #define I2C_SCL1			I2C_SCL_INTERNAL
+#define I2C_SDA2			(PH_12)
+#define I2C_SCL2			(PH_11)
 
 #define SPI_HOWMANY			1