Rename the I2 port class.

I2C3.h

@@ -0,0 +1,48 @@
+/*
+ *   Copyright (C) 2020,2021 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+
+#if defined(MODE_OLED)
+
+#if !defined(I2C3_H)
+#define  I2C3_H
+
+#if defined(STM32F7XX)
+#include "stm32f7xx.h"
+#include "stm32f7xx_i2c.h"
+#endif
+
+
+class CI2C3 {
+public:
+  CI2C3();
+
+  bool init();
+
+  uint8_t write(uint8_t addr, const uint8_t* data, uint16_t length);
+
+private:
+  bool waitISRFlagsSet(uint32_t flags);
+  void configureDataTransfer(uint8_t size);
+};
+
+#endif
+
+#endif
+