91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android/sensor.h>
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#include <gui/Sensor.h>
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#include <gui/SensorManager.h>
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#include <gui/SensorEventQueue.h>
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#include <utils/PollLoop.h>
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using namespace android;
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bool receiver(int fd, int events, void* data)
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{
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sp<SensorEventQueue> q((SensorEventQueue*)data);
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ssize_t n;
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ASensorEvent buffer[8];
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while ((n = q->read(buffer, 8)) > 0) {
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for (int i=0 ; i<n ; i++) {
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if (buffer[i].type == Sensor::TYPE_ACCELEROMETER) {
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printf("time=%lld, value=<%5.1f,%5.1f,%5.1f>\n",
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buffer[i].timestamp,
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buffer[i].acceleration.x,
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buffer[i].acceleration.y,
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buffer[i].acceleration.z);
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}
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}
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}
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if (n<0 && n != -EAGAIN) {
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printf("error reading events (%s)\n", strerror(-n));
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}
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return true;
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}
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int main(int argc, char** argv)
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{
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SensorManager& mgr(SensorManager::getInstance());
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Sensor const* const* list;
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ssize_t count = mgr.getSensorList(&list);
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printf("numSensors=%d\n", count);
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sp<SensorEventQueue> q = mgr.createEventQueue();
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printf("queue=%p\n", q.get());
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Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_ACCELEROMETER);
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printf("accelerometer=%p (%s)\n",
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accelerometer, accelerometer->getName().string());
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q->enableSensor(accelerometer);
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q->setEventRate(accelerometer, ms2ns(10));
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sp<PollLoop> loop = new PollLoop(false);
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loop->setCallback(q->getFd(), POLLIN, receiver, q.get());
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do {
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//printf("about to poll...\n");
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int32_t ret = loop->pollOnce(-1, 0, 0);
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switch (ret) {
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case ALOOPER_POLL_CALLBACK:
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//("ALOOPER_POLL_CALLBACK\n");
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break;
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case ALOOPER_POLL_TIMEOUT:
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printf("ALOOPER_POLL_TIMEOUT\n");
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break;
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case ALOOPER_POLL_ERROR:
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printf("ALOOPER_POLL_TIMEOUT\n");
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break;
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default:
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printf("ugh? poll returned %d\n", ret);
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break;
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}
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} while (1);
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return 0;
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}
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