Sensor HAL: Added Compass

Added Compass (Magnetometer) HAL as defined by HID sensor usage
table. This only implements the minimal set.

Change-Id: I19c222019b8770942e23f614ada8a2c35d401471
Signed-off-by: srinivas pandruvada <srinivas.pandruvada@intel.com>

diff --git a/common/libsensors/HidSensor_Compass3D.cpp b/common/libsensors/HidSensor_Compass3D.cpp
new file mode 100644 (file)
index 0000000..f9f03d0
--- /dev/null
+++ b/common/libsensors/HidSensor_Compass3D.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <fcntl.h>
+#include <errno.h>
+#include <math.h>
+#include <poll.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <sys/select.h>
+#include <cutils/log.h>
+
+#include "common.h"
+#include "SensorConfig.h"
+#include "HidSensor_Compass3D.h"
+
+#define CHANNEL_X 0
+#define CHANNEL_Y 1
+#define CHANNEL_Z 2
+
+struct compass_3d_sample{
+    unsigned int compass_x;
+    unsigned int compass_y;
+    unsigned int compass_z;
+} __packed;
+
+const struct sensor_t CompassSensor::sSensorInfo_compass3D = {
+    "HID_SENSOR Compass 3D", "Intel", 1, SENSORS_MAGNETIC_FIELD_HANDLE,
+        SENSOR_TYPE_MAGNETIC_FIELD, RANGE_M, RESOLUTION_M, 0.1f, 23000, {}
+};
+const int retry_cnt = 5;
+
+CompassSensor::CompassSensor(): SensorIIODev("magn_3d", "in_magn_scale", "in_magn_offset", "in_magn_", retry_cnt){
+    ALOGV(">>ComassSensor 3D: constructor!");
+    mPendingEvent.version = sizeof(sensors_event_t);
+    mPendingEvent.sensor = ID_M;
+    mPendingEvent.type = SENSOR_TYPE_MAGNETIC_FIELD;
+    memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
+    ALOGV("<<ComassSensor 3D: constructor!");
+}
+
+int CompassSensor::processEvent(unsigned char *raw_data, size_t raw_data_len){
+    struct compass_3d_sample *sample;
+
+    ALOGV(">>%s", __func__);
+    if (IsDeviceInitialized() == false){
+        ALOGE("Device was not initialized \n");
+        return  - 1;
+    } if (raw_data_len < sizeof(struct compass_3d_sample)){
+        ALOGE("Insufficient length \n");
+        return  - 1;
+    }
+    sample = (struct compass_3d_sample*)raw_data;
+
+    mPendingEvent.data[0] = mPendingEvent.magnetic.x = CONVERT_M_MG_VTF16E14_X
+        (GetChannelBytesUsedSize(CHANNEL_X), GetExponentValue(), sample->compass_x);
+    mPendingEvent.data[1] = mPendingEvent.magnetic.y = CONVERT_M_MG_VTF16E14_Y
+        (GetChannelBytesUsedSize(CHANNEL_Y), GetExponentValue(), sample->compass_y);
+    mPendingEvent.data[2] = mPendingEvent.magnetic.z = CONVERT_M_MG_VTF16E14_Z
+        (GetChannelBytesUsedSize(CHANNEL_Z), GetExponentValue(), sample->compass_z);
+
+    ALOGV("COMPASS 3D Sample %fuT %fuT %fuT\n", mPendingEvent.magnetic.x,
+        mPendingEvent.magnetic.y, mPendingEvent.magnetic.z);
+    ALOGV("<<%s", __func__);
+    return 0;
+}

diff --git a/common/libsensors/HidSensor_Compass3D.h b/common/libsensors/HidSensor_Compass3D.h
new file mode 100644 (file)
index 0000000..ebf117e
--- /dev/null
+++ b/common/libsensors/HidSensor_Compass3D.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef HIDSENSOR_COMPASS3D_H
+#define HIDSENSOR_COMPASS3D_H
+
+#include <stdint.h>
+#include <errno.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include "SensorIIODev.h"
+#include "Helpers.h"
+
+class CompassSensor : public SensorIIODev {
+
+public:
+    CompassSensor();
+    virtual int processEvent(unsigned char *raw_data, size_t raw_data_len);
+    static const struct sensor_t sSensorInfo_compass3D;
+};
+#endif