A110x: Adding C source

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

src/a110x/a110x.c

@@ -0,0 +1,74 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ *         Abhishek Malik <abhishek.malik@intel.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 "a110x.h"
+
+a110x_context a110x_init(uint8_t pin){
+    a110x_context dev =
+      (a110x_context) malloc(sizeof(struct _a110x_context));
+
+    if (!dev)
+      {
+        return NULL;
+      }
+
+    dev->gpio_pin = pin;
+    dev->gpio = mraa_gpio_init(dev->gpio_pin);
+    if (mraa_gpio_dir(dev->gpio, MRAA_GPIO_IN) != MRAA_SUCCESS){
+        free(dev);
+        return NULL;
+    }
+    dev->isr_installed = false;
+    return dev;
+}
+
+void a110x_close(a110x_context dev){
+    free(dev);
+}
+
+upm_result_t a110x_magnet_detected(a110x_context dev, bool* res){
+    int val = mraa_gpio_read(dev->gpio);
+    if (val == 0)
+        *res = false;
+    else
+        *res = true;
+    return UPM_SUCCESS;
+}
+
+upm_result_t a110x_install_isr(a110x_context dev,
+                               mraa_gpio_edge_t edge_level,
+                               void (*isr)(void *), void *arg){
+    if (dev->isr_installed)
+        a110x_uninstall_isr(dev);
+
+    mraa_gpio_isr(dev->gpio, edge_level, isr, arg);
+    dev->isr_installed = true;
+    return UPM_SUCCESS;
+}
+
+upm_result_t a110x_uninstall_isr(a110x_context dev){
+    mraa_gpio_isr_exit(dev->gpio);
+    dev->isr_installed = false;
+    return UPM_SUCCESS;
+}