pwm.hpp: Add C++ wrapper around Pwm

* maa_pwm_context becomes an opaque pointer
* C++ wrapper class Pwm
* swig now uses C++ wrapper Pwm to generate API

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

api/pwm.hpp

@@ -0,0 +1,82 @@
+/*
+ * 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 pwm C++ interface for libmaa
+ *
+ */
+
+#include "pwm.h"
+
+namespace maa {
+
+class Pwm {
+    public:
+        Pwm(int pin, int chipid=-1) {
+            if (chipid == -1)
+                m_pwm = maa_pwm_init(pin);
+            else
+                m_pwm = maa_pwm_init_raw(pin, chipid);
+        }
+        ~Pwm() {
+            maa_pwm_close(m_pwm);
+        }
+        maa_result_t write(float percentage) {
+            return maa_pwm_write(m_pwm, percentage);
+        }
+        float read() {
+            return maa_pwm_read(m_pwm);
+        }
+        maa_result_t period(float period) {
+            return maa_pwm_period(m_pwm, period);
+        }
+        maa_result_t period_ms(int ms) {
+            return maa_pwm_period_ms(m_pwm, ms);
+        }
+        maa_result_t period_us(int us) {
+            return maa_pwm_period_us(m_pwm, us);
+        }
+        maa_result_t pulsewidth(float seconds) {
+            return maa_pwm_pulsewidth(m_pwm, seconds);
+        }
+        maa_result_t pulsewidth_ms(int ms) {
+            return maa_pwm_pulsewidth_ms(m_pwm, ms);
+        }
+        maa_result_t pulsewidth_us(int us) {
+            return maa_pwm_pulsewidth_us(m_pwm, us);
+        }
+        maa_result_t enable(bool enable) {
+            if (enable)
+                return maa_pwm_enable(m_pwm, 1);
+            else
+                return maa_pwm_enable(m_pwm, 0);
+        }
+    private:
+        maa_pwm_context m_pwm;
+};
+
+}