biss0001: add C driver and example, C++ wraps C driver

Signed-off-by: Jon Trulson <jtrulson@ics.com>

src/biss0001/biss0001.c

@@ -0,0 +1,77 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ *         Zion Orent <zorent@ics.com>
+ * Copyright (c) 2016 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.
+ */
+
+#include <assert.h>
+#include "biss0001.h"
+
+biss0001_context biss0001_init(unsigned int pin)
+{
+    biss0001_context dev =
+        (biss0001_context)malloc(sizeof(struct _biss0001_context));
+
+    if (!dev)
+        return NULL;
+
+    dev->gpio = NULL;
+
+    // make sure MRAA is initialized
+    int mraa_rv;
+    if ((mraa_rv = mraa_init()) != MRAA_SUCCESS)
+    {
+        printf("%s: mraa_init() failed (%d).\n", __FUNCTION__, mraa_rv);
+        biss0001_close(dev);
+        return NULL;
+    }
+
+    // initialize the MRAA context
+
+    if (!(dev->gpio = mraa_gpio_init(pin)))
+    {
+        printf("%s: mraa_gpio_init() failed.\n", __FUNCTION__);
+        biss0001_close(dev);
+        return NULL;
+    }
+
+    mraa_gpio_dir(dev->gpio, MRAA_GPIO_IN);
+
+    return dev;
+}
+
+void biss0001_close(biss0001_context dev)
+{
+    assert(dev != NULL);
+
+    if (dev->gpio)
+        mraa_gpio_close(dev->gpio);
+
+    free(dev);
+}
+
+bool biss0001_motion_detected(const biss0001_context dev)
+{
+    assert(dev != NULL);
+
+    return (mraa_gpio_read(dev->gpio) ? true : false);
+}