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/aio.h

@@ -0,0 +1,82 @@
+/*
+ * Author: Nandkishor Sonar
+ * 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 Analog input/output
+ *
+ * AIO is the anlog input & output interface to libmaa. It is used to read or
+ * set the voltage applied to an AIO pin.
+ *
+ * @snippet analogin_a0.c Interesting
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdint.h>
+
+#include "maa.h"
+#include "gpio.h"
+
+#define ADC_RAW_RESOLUTION_BITS         (12)
+#define ADC_SUPPORTED_RESOLUTION_BITS   (10)
+
+/**
+ * Opaque pointer definition to the internal struct _aio. This context refers
+ * to one single AIO pin on the board.
+ */
+typedef struct _aio* maa_aio_context;
+
+/**
+ * Initialise an Analog input device, connected to the specified pin
+ *
+ * @param pin Channel number to read ADC inputs
+ * @returns aio context or NULL
+ */
+maa_aio_context maa_aio_init(unsigned int pin);
+
+/**
+ * Read the input voltage
+ *
+ * @param dev The AIO context
+ * @returns The current input voltage, normalised to a 16-bit value
+ */
+uint16_t maa_aio_read(maa_aio_context dev);
+
+/**
+ * Close the analog input context, this will free the memory for the context
+ *
+ * @param dev The AIO context
+ * @return Result of operation
+ */
+maa_result_t maa_aio_close(maa_aio_context dev);
+
+#ifdef __cplusplus
+}
+#endif