Linux: Add support for SPIDEV (#734)

RPi and Linux refactor. Add GPIO Sysfs for GPIO operations. Update configure script. Fix some cppcheck warnings. Add serial emulation that prints to stdout. Fix some file headers.
2017-01-14 23:50:21 +01:00
parent aa5cecfca1
commit 2e0f6b6229
43 changed files with 1574 additions and 593 deletions
@@ -0,0 +1,94 @@
+/*
+  TwoWire.h - TWI/I2C library for Arduino & Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
+  Modified December 2014 by Ivan Grokhotkov (ivan@esp8266.com) - esp8266 support
+  Modified April 2015 by Hrsto Gochkov (ficeto@ficeto.com) - alternative esp8266 support
+  Modified October 2016 by Marcelo Aquino <marceloaqno@gmail.org> for Raspberry Pi
+*/
+
+#ifndef Wire_h
+#define Wire_h
+
+#if !DOXYGEN
+#include <stdint.h>
+#include "Stream.h"
+#include "RPi.h"
+
+#define BUFFER_LENGTH 32
+
+class TwoWire : public Stream
+{
+
+private:
+	static uint8_t rxBuffer[];
+	static uint8_t rxBufferIndex;
+	static uint8_t rxBufferLength;
+
+	static uint8_t txAddress;
+	static uint8_t txBuffer[];
+	static uint8_t txBufferIndex;
+	static uint8_t txBufferLength;
+
+	static uint8_t transmitting;
+
+public:
+	void begin();
+	void begin(uint8_t address);
+	void begin(int address);
+	void end();
+	void setClock(uint32_t clock);
+
+	void beginTransmission(uint8_t address);
+	void beginTransmission(int address);
+	uint8_t endTransmission(void);
+
+	size_t requestFrom(uint8_t address, size_t size);
+	uint8_t requestFrom(uint8_t address, uint8_t quantity);
+	uint8_t requestFrom(int address, int quantity);
+
+	size_t write(uint8_t data);
+	size_t write(const uint8_t *data, size_t quantity);
+	int available();
+	int read();
+	int peek();
+	void flush();
+
+	inline size_t write(unsigned long n)
+	{
+		return write((uint8_t)n);
+	}
+	inline size_t write(long n)
+	{
+		return write((uint8_t)n);
+	}
+	inline size_t write(unsigned int n)
+	{
+		return write((uint8_t)n);
+	}
+	inline size_t write(int n)
+	{
+		return write((uint8_t)n);
+	}
+	using Print::write;
+};
+
+extern TwoWire Wire;
+
+#endif
+#endif