maa: add global maa.h and maa.hpp and stop using /usr/include/maa/

* pkg-config now only sees maa.h & maa.hpp
* usage of maa/*.{h,hpp} is still allowed
* examples updated to use maa.{h,hpp}

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

api/maa/i2c.h

@@ -0,0 +1,140 @@
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+
+/**
+ * @file
+ * @brief Inter-Integrated Circuit
+ *
+ * This file defines the i2c/Iic interface for libmaa. A context represents a
+ * bus and that bus may contain multiple addresses or i2c slaves. It is
+ * considered best practice to make sure the address is correct before doing
+ * any calls on i2c, in case another application or even thread changed the
+ * addres on that bus. Multiple instances of the same bus can exist.
+ *
+ * @snippet i2c_HMC5883L.c Interesting
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdint.h>
+
+#include "maa.h"
+#include "gpio.h"
+
+/**
+ * Opaque pointer definition to the internal struct _i2c
+ */
+typedef struct _i2c* maa_i2c_context;
+
+/**
+ * Initialise i2c context, using board defintions
+ *
+ * @param bus i2c bus to use
+ * @return i2c context or NULL
+ */
+maa_i2c_context maa_i2c_init(int bus);
+
+/**
+ * Initialise i2c context, passing in spi bus to use.
+ *
+ * @param bus The i2c bus to use i.e. /dev/i2c-2 would be "2"
+ * @return i2c context or NULL
+ */
+maa_i2c_context maa_i2c_init_raw(unsigned int bus);
+
+/**
+ * Sets the frequency of the i2c context
+ *
+ * @param dev The i2c context
+ * @param hz The bus frequency in hertz
+ * @return Result of operation
+ */
+maa_result_t maa_i2c_frequency(maa_i2c_context dev, int hz);
+
+/**
+ * Read from an i2c context
+ *
+ * @param dev The i2c context
+ * @param data pointer to the byte array to read data in to
+ * @param length max number of bytes to read
+ * @return Result of operation
+ */
+maa_result_t maa_i2c_read(maa_i2c_context dev, uint8_t *data, int length);
+
+/**
+ * Read a single byte from the i2c context
+ *
+ * @param dev The i2c context
+ * @return The result of the read or -1 if failed
+ */
+uint8_t maa_i2c_read_byte(maa_i2c_context dev);
+
+/**
+ * Write to an i2c context
+ *
+ * @param dev The i2c context
+ * @param data pointer to the byte array to be written
+ * @param length the number of bytes to transmit
+ * @return Result of operation
+ */
+maa_result_t maa_i2c_write(maa_i2c_context dev, const uint8_t *data, int length);
+
+/**
+ * Write a single byte to an i2c context
+ *
+ * @param dev The i2c context
+ * @param data The byte to write
+ * @return Result of operation
+ */
+maa_result_t maa_i2c_write_byte(maa_i2c_context dev, const uint8_t data);
+
+/**
+ * Sets the i2c context address.
+ *
+ * @param dev The i2c context
+ * @param address The address to set for the slave (ignoring the least
+ *   signifcant bit). If set to 0, the slave will only respond to the
+ *   general call address.
+ * @return Result of operation
+ */
+maa_result_t maa_i2c_address(maa_i2c_context dev, int address);
+
+/**
+ * De-inits an maa_i2c_context device
+ *
+ * @param dev The i2c context
+ * @return Result of operation
+ */
+maa_result_t maa_i2c_stop(maa_i2c_context dev);
+
+#ifdef __cplusplus
+}
+#endif