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authoratinm <atin.malaviya@gmail.com>2011-05-17 11:12:26 -0400
committeratinm <atin.malaviya@gmail.com>2011-05-17 11:12:26 -0400
commit93a7e5951c8dfcdf609161875493ef6925f68ca7 (patch)
tree4f6a18bc3d66a41021e627412a54bb80567264c3 /libsensors/CompassSensor.cpp
parent306e030c5772b1cd1d38a4801db2bc128021003a (diff)
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moved to device/samsung/aries-common
Diffstat (limited to 'libsensors/CompassSensor.cpp')
-rw-r--r--libsensors/CompassSensor.cpp166
1 files changed, 166 insertions, 0 deletions
diff --git a/libsensors/CompassSensor.cpp b/libsensors/CompassSensor.cpp
new file mode 100644
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--- /dev/null
+++ b/libsensors/CompassSensor.cpp
@@ -0,0 +1,166 @@
+/*
+ * 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 "CompassSensor.h"
+
+
+/*****************************************************************************/
+CompassSensor::CompassSensor()
+ : SensorBase(NULL, "magnetic_sensor"),
+ //mEnabled(0),
+ mInputReader(4),
+ mHasPendingEvent(false)
+{
+ LOGD("CompassSensor::CompassSensor()");
+ mPendingEvent.version = sizeof(sensors_event_t);
+ mPendingEvent.sensor = ID_M;
+ mPendingEvent.type = SENSOR_TYPE_MAGNETIC_FIELD;
+ mPendingEvent.magnetic.status = SENSOR_STATUS_ACCURACY_HIGH;
+
+
+ memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
+
+ LOGD("CompassSensor::CompassSensor() open data_fd");
+
+ if (data_fd) {
+ strcpy(input_sysfs_path, "/sys/class/input/");
+ strcat(input_sysfs_path, input_name);
+ strcat(input_sysfs_path, "/device/");
+ input_sysfs_path_len = strlen(input_sysfs_path);
+
+ //enable(0, 1);
+ }
+}
+
+CompassSensor::~CompassSensor() {
+
+ LOGD("CompassSensor::~CompassSensor()");
+ if (mEnabled) {
+ enable(0, 0);
+ }
+}
+
+
+
+int CompassSensor::enable(int32_t, int en) {
+
+
+ LOGD("CompassSensor::~enable(0, %d)", en);
+ int flags = en ? 1 : 0;
+ if (flags != mEnabled) {
+ int fd;
+ strcpy(&input_sysfs_path[input_sysfs_path_len], "enable");
+ LOGD("CompassSensor::~enable(0, %d) open %s",en, input_sysfs_path);
+ fd = open(input_sysfs_path, O_RDWR);
+ if (fd >= 0) {
+ LOGD("CompassSensor::~enable(0, %d) opened %s",en, input_sysfs_path);
+ char buf[2];
+ int err;
+ buf[1] = 0;
+ if (flags) {
+ buf[0] = '1';
+ } else {
+ buf[0] = '0';
+ }
+ err = write(fd, buf, sizeof(buf));
+ close(fd);
+ mEnabled = flags;
+ return 0;
+ }
+ return -1;
+ }
+ return 0;
+}
+
+
+bool CompassSensor::hasPendingEvents() const {
+ /* FIXME probably here should be returning mEnabled but instead
+ mHasPendingEvents. It does not work, so we cheat.*/
+ //LOGD("CompassSensor::~hasPendingEvents %d", mHasPendingEvent ? 1 : 0 );
+ return mHasPendingEvent;
+}
+
+
+int CompassSensor::setDelay(int32_t handle, int64_t ns)
+{
+ LOGD("CompassSensor::~setDelay(%d, %d)", handle, ns);
+ /* FIXME needs changes to the kernel driver.
+ We need to add a IOCTL that can set the samplingrate
+ the driver in ther kernel supports this allready only need
+ to add a IOCTL on both sides for that*/
+ return 0;
+}
+
+
+int CompassSensor::readEvents(sensors_event_t* data, int count)
+{
+ //LOGD("CompassSensor::~readEvents() %d", count);
+ if (count < 1)
+ return -EINVAL;
+
+ if (mHasPendingEvent) {
+ mHasPendingEvent = false;
+ mPendingEvent.timestamp = getTimestamp();
+ *data = mPendingEvent;
+ return mEnabled ? 1 : 0;
+ }
+
+ ssize_t n = mInputReader.fill(data_fd);
+ if (n < 0)
+ return n;
+
+ int numEventReceived = 0;
+ input_event const* event;
+
+ while (count && mInputReader.readEvent(&event)) {
+ int type = event->type;
+ if (type == EV_REL) {
+ float value = event->value;
+ if (event->code == EVENT_TYPE_MAGV_X) {
+ mPendingEvent.magnetic.x = value * CONVERT_M_X;
+ } else if (event->code == EVENT_TYPE_MAGV_Y) {
+ mPendingEvent.magnetic.y = value * CONVERT_M_Y;
+ } else if (event->code == EVENT_TYPE_MAGV_Z) {
+ mPendingEvent.magnetic.z = value * CONVERT_M_Z;
+ }
+ } else if (type == EV_SYN) {
+ mPendingEvent.timestamp = timevalToNano(event->time);
+ if (mEnabled) {
+ *data++ = mPendingEvent;
+ count--;
+ numEventReceived++;
+ }
+ } else {
+ LOGE("CompassSensor: unknown event (type=%d, code=%d)",
+ type, event->code);
+ }
+ mInputReader.next();
+ }
+
+ //LOGD("CompassSensor::~readEvents() numEventReceived = %d", numEventReceived);
+ return numEventReceived++;
+
+}