Home | History | Annotate | Download | only in tests 
      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <inttypes.h>
     18 #include <android/sensor.h>
     19 #include <gui/Sensor.h>
     20 #include <gui/SensorManager.h>
     21 #include <gui/SensorEventQueue.h>
     22 #include <utils/Looper.h>
     23 
     24 using namespace android;
     25 
     26 static nsecs_t sStartTime = 0;
     27 
     28 
     29 int receiver(__unused int fd, __unused int events, void* data)
     30 {
     31     sp<SensorEventQueue> q((SensorEventQueue*)data);
     32     ssize_t n;
     33     ASensorEvent buffer[8];
     34 
     35     static nsecs_t oldTimeStamp = 0;
     36 
     37     while ((n = q->read(buffer, 8)) > 0) {
     38         for (int i=0 ; i<n ; i++) {
     39             float t;
     40             if (oldTimeStamp) {
     41                 t = float(buffer[i].timestamp - oldTimeStamp) / s2ns(1);
     42             } else {
     43                 t = float(buffer[i].timestamp - sStartTime) / s2ns(1);
     44             }
     45             oldTimeStamp = buffer[i].timestamp;
     46 
     47             if (buffer[i].type == Sensor::TYPE_ACCELEROMETER) {
     48                 printf("%" PRId64 "\t%8f\t%8f\t%8f\t%f\n",
     49                         buffer[i].timestamp,
     50                         buffer[i].data[0], buffer[i].data[1], buffer[i].data[2],
     51                         1.0/t);
     52             }
     53 
     54         }
     55     }
     56     if (n<0 && n != -EAGAIN) {
     57         printf("error reading events (%s)\n", strerror(-n));
     58     }
     59     return 1;
     60 }
     61 
     62 
     63 int main()
     64 {
     65     SensorManager& mgr = SensorManager::getInstanceForPackage(String16("Sensor Service Test"));
     66 
     67     Sensor const* const* list;
     68     ssize_t count = mgr.getSensorList(&list);
     69     printf("numSensors=%d\n", int(count));
     70 
     71     sp<SensorEventQueue> q = mgr.createEventQueue();
     72     printf("queue=%p\n", q.get());
     73 
     74     Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_ACCELEROMETER);
     75     printf("accelerometer=%p (%s)\n",
     76             accelerometer, accelerometer->getName().string());
     77 
     78     sStartTime = systemTime();
     79 
     80     q->enableSensor(accelerometer);
     81 
     82     q->setEventRate(accelerometer, ms2ns(10));
     83 
     84     sp<Looper> loop = new Looper(false);
     85     loop->addFd(q->getFd(), 0, ALOOPER_EVENT_INPUT, receiver, q.get());
     86 
     87     do {
     88         //printf("about to poll...\n");
     89         int32_t ret = loop->pollOnce(-1);
     90         switch (ret) {
     91             case ALOOPER_POLL_WAKE:
     92                 //("ALOOPER_POLL_WAKE\n");
     93                 break;
     94             case ALOOPER_POLL_CALLBACK:
     95                 //("ALOOPER_POLL_CALLBACK\n");
     96                 break;
     97             case ALOOPER_POLL_TIMEOUT:
     98                 printf("ALOOPER_POLL_TIMEOUT\n");
     99                 break;
    100             case ALOOPER_POLL_ERROR:
    101                 printf("ALOOPER_POLL_TIMEOUT\n");
    102                 break;
    103             default:
    104                 printf("ugh? poll returned %d\n", ret);
    105                 break;
    106         }
    107     } while (1);
    108 
    109 
    110     return 0;
    111 }
    112