iio: Add initial module

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

api/mraa/iio.h

@@ -0,0 +1,74 @@
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@intel.com>
+ * Copyright (c) 2015 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 iio
+ *
+ * An iio context represents an IIO device
+ *
+ * @snippet iio_driver.c Interesting
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdint.h>
+
+#include "common.h"
+
+/**
+ * Opaque pointer definition to the internal struct _iio
+ */
+typedef struct _iio* mraa_iio_context;
+
+/**
+ * Initialise iio context
+ *
+ * @param bus iio device to use
+ * @return i2c context or NULL
+ */
+mraa_iio_context mraa_iio_init(int device);
+
+/**
+ */
+mraa_result_t mraa_iio_read(mraa_iio_context dev, uint32_t *data, int length);
+
+/**
+ * De-inits an mraa_iio_context device
+ *
+ * @param dev The iio context
+ * @return Result of operation
+ */
+mraa_result_t mraa_iio_stop(mraa_iio_context dev);
+
+#ifdef __cplusplus
+}
+#endif

include/mraa_internal_types.h

@@ -129,6 +129,13 @@ struct _uart {
     /*@}*/
 };
 
+/**
+ * A structure reprensting an IIO device
+ */
+struct _iio {
+    int num; /**< IIO device number */
+};
+
 /**
  * A bitfield representing the capabilities of a pin.
  */

src/CMakeLists.txt

@@ -16,6 +16,7 @@ set (mraa_LIB_SRCS_NOAUTO
   ${PROJECT_SOURCE_DIR}/src/spi/spi.c
   ${PROJECT_SOURCE_DIR}/src/aio/aio.c
   ${PROJECT_SOURCE_DIR}/src/uart/uart.c
+  ${PROJECT_SOURCE_DIR}/src/iio/iio.c
 )
 
 set (mraa_LIB_X86_SRCS_NOAUTO

src/iio/iio.c

@@ -0,0 +1,53 @@
+/*
+ * Author: Brendan Le Foll <brendan.le.foll@intel.com>
+ * Copyright (c) 2015 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 "iio.h"
+#include "mraa_internal.h"
+
+mraa_iio_context
+mraa_iio_init(int device)
+{
+    mraa_iio_context dev = (mraa_iio_context) calloc(1, sizeof(struct _iio));
+    if (dev == NULL) {
+        syslog(LOG_CRIT, "iio: Failed to allocate memory for context");
+        return NULL;
+    }
+
+    return dev;
+}
+
+
+mraa_result_t
+mraa_iio_read(mraa_iio_context dev, uint32_t* data, int length)
+{
+   return 0;
+}
+
+mraa_result_t
+mraa_iio_stop(mraa_iio_context dev)
+{
+    free(dev);
+    return MRAA_SUCCESS;
+}
+