spi.hpp: Add C++ wrapper around Spi

* maa_spi_context becomes an opaque pointer
* C++ wrapper class Spi created
* swig now uses C++ wrapper Gpio to generate API

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

api/spi.hpp

@@ -0,0 +1,60 @@
+/*
+ * 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
+ *
+ * This file defines the spi C++ interface for libmaa
+ */
+
+#include "spi.h"
+
+namespace maa {
+
+class Spi {
+    public:
+        Spi() {
+            m_spi = maa_spi_init();
+        }
+        ~Spi() {
+            maa_spi_stop(m_spi);
+        }
+        maa_result_t mode(unsigned short mode) {
+            return maa_spi_mode(m_spi, mode);
+        }
+        maa_result_t frequency(int hz) {
+            return maa_spi_frequency(m_spi, hz);
+        }
+        uint8_t write(uint8_t data) {
+            return maa_spi_write(m_spi, data);
+        }
+        uint8_t* write_buf(uint8_t* data, int length) {
+            return maa_spi_write_buf(m_spi, data, length);
+        }
+    private:
+        maa_spi_context m_spi;
+};
+
+}