iio: added event api

Signed-off-by: Lay, Kuan Loon <kuan.loon.lay@intel.com> Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
2015-10-16 09:18:32 +08:00
parent e5f28ab04c
commit 4c41d2c2df
5 changed files with 379 additions and 0 deletions
--- a/api/mraa/iio.h
+++ b/api/mraa/iio.h
@@ -25,6 +25,7 @@
 #pragma once

 #include "common.h"
+#include "iio_kernel_headers.h"

 typedef struct {
    int index;
@@ -40,6 +41,11 @@ typedef struct {
    unsigned int location;
 } mraa_iio_channel;

+typedef struct {
+    char *name;
+	int enabled;
+} mraa_iio_event;
+
 /**
 * @file
 * @brief iio
@@ -96,6 +102,17 @@ mraa_result_t mraa_iio_write(mraa_iio_context dev, const char* attribute);

 mraa_result_t mraa_iio_get_channel_data(mraa_iio_context dev);

+mraa_result_t mraa_iio_get_event_data(mraa_iio_context dev);
+
+mraa_result_t mraa_iio_event_read(mraa_iio_context dev, const char* attribute, float* data);
+
+mraa_result_t mraa_iio_event_write(mraa_iio_context dev, const char* attribute, const char* data);
+
+mraa_result_t mraa_iio_event_poll(mraa_iio_context dev, struct iio_event_data* data);
+
+mraa_result_t mraa_iio_event_setup_callback(mraa_iio_context dev, void (*fptr)(struct iio_event_data* data), void* args);
+
+mraa_result_t mraa_iio_event_extract_event(struct iio_event_data* event, int* chan_type, int* modifier, int* type, int* direction, int* channel, int* channel2, int* different);
 /**
 * De-inits an mraa_iio_context device
 *
--- a/api/mraa/iio_kernel_headers.h
+++ b/api/mraa/iio_kernel_headers.h
@@ -0,0 +1,136 @@
+/*
+ * Author: Lay, Kuan Loon <kuan.loon.lay@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.
+ */
+
+//For kernel 4.1+,
+//#include <linux/iio/types.h>
+//#include <linux/iio/events.h>
+
+//linux/iio/types.h
+enum iio_chan_type {
+        IIO_VOLTAGE,
+        IIO_CURRENT,
+        IIO_POWER,
+        IIO_ACCEL,
+        IIO_ANGL_VEL,
+        IIO_MAGN,
+        IIO_LIGHT,
+        IIO_INTENSITY,
+        IIO_PROXIMITY,
+        IIO_TEMP,
+        IIO_INCLI,
+        IIO_ROT,
+        IIO_ANGL,
+        IIO_TIMESTAMP,
+        IIO_CAPACITANCE,
+        IIO_ALTVOLTAGE,
+        IIO_CCT,
+        IIO_PRESSURE,
+        IIO_HUMIDITYRELATIVE,
+        IIO_ACTIVITY,
+        IIO_STEPS,
+        IIO_ENERGY,
+        IIO_DISTANCE,
+        IIO_VELOCITY,
+};
+
+enum iio_modifier {
+        IIO_NO_MOD,
+        IIO_MOD_X,
+        IIO_MOD_Y,
+        IIO_MOD_Z,
+        IIO_MOD_X_AND_Y,
+        IIO_MOD_X_AND_Z,
+        IIO_MOD_Y_AND_Z,
+        IIO_MOD_X_AND_Y_AND_Z,
+        IIO_MOD_X_OR_Y,
+        IIO_MOD_X_OR_Z,
+        IIO_MOD_Y_OR_Z,
+        IIO_MOD_X_OR_Y_OR_Z,
+        IIO_MOD_LIGHT_BOTH,
+        IIO_MOD_LIGHT_IR,
+        IIO_MOD_ROOT_SUM_SQUARED_X_Y,
+        IIO_MOD_SUM_SQUARED_X_Y_Z,
+        IIO_MOD_LIGHT_CLEAR,
+        IIO_MOD_LIGHT_RED,
+        IIO_MOD_LIGHT_GREEN,
+        IIO_MOD_LIGHT_BLUE,
+        IIO_MOD_QUATERNION,
+        IIO_MOD_TEMP_AMBIENT,
+        IIO_MOD_TEMP_OBJECT,
+        IIO_MOD_NORTH_MAGN,
+        IIO_MOD_NORTH_TRUE,
+        IIO_MOD_NORTH_MAGN_TILT_COMP,
+        IIO_MOD_NORTH_TRUE_TILT_COMP,
+        IIO_MOD_RUNNING,
+        IIO_MOD_JOGGING,
+        IIO_MOD_WALKING,
+        IIO_MOD_STILL,
+        IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
+};
+
+enum iio_event_type {
+        IIO_EV_TYPE_THRESH,
+        IIO_EV_TYPE_MAG,
+        IIO_EV_TYPE_ROC,
+        IIO_EV_TYPE_THRESH_ADAPTIVE,
+        IIO_EV_TYPE_MAG_ADAPTIVE,
+        IIO_EV_TYPE_CHANGE,
+};
+
+enum iio_event_direction {
+        IIO_EV_DIR_EITHER,
+        IIO_EV_DIR_RISING,
+        IIO_EV_DIR_FALLING,
+        IIO_EV_DIR_NONE,
+};
+
+//linux/iio/events.h
+#include <linux/ioctl.h>
+
+/**
+ * struct iio_event_data - The actual event being pushed to userspace
+ * @id:		event identifier
+ * @timestamp:	best estimate of time of event occurrence (often from
+ *		the interrupt handler)
+ */
+struct iio_event_data {
+	unsigned long long int	id;
+	long long int	timestamp;
+};
+
+#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
+
+#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
+
+#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
+
+#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
+
+/* Event code number extraction depends on which type of event we have.
+ * Perhaps review this function in the future*/
+#define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((short int)(mask & 0xFFFF))
+#define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((short int)(((mask) >> 16) & 0xFFFF))
+
+#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
+#define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)