apps/web/imgsrv/start_gps_compass.php

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#!/usr/local/sbin/php -q
<?php
/*
*! FILE NAME  : start_gps_compass.php
*! DESCRIPTION: Looks for USB GPS (currently Garmin GPS 18 USB) and compass
*!              (currently Ocean Server OS-5000), re-initializes Exif header
*!              and starts the devices if found
*!
*! Copyright (C) 2008 Elphel, Inc
*! -----------------------------------------------------------------------------**
*!
*!  This program is free software: you can redistribute it and/or modify
*!  it under the terms of the GNU General Public License as published by
*!  the Free Software Foundation, either version 3 of the License, or
*!  (at your option) any later version.
*!
*!  This program is distributed in the hope that it will be useful,
*!  but WITHOUT ANY WARRANTY; without even the implied warranty of
*!  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*!  GNU General Public License for more details.
*!
*!  You should have received a copy of the GNU General Public License
*!  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*! -----------------------------------------------------------------------------**
*!  $Log: start_gps_compass.php,v $
*!  Revision 1.1.1.1  2008/11/27 20:04:01  elphel
*!
*!
*!  Revision 1.2  2008/11/20 07:03:40  elphel
*!  exit value now encodes detected devices
*!
*!  Revision 1.1  2008/04/07 09:14:47  elphel
*!  Discover/startup GPS and compass
*!
*/
//look uptime, sleep if just started (no USB yet)
 $wait_time=20; // wait for $wait_time if both devices were not found, retry
    $compass=null;
    $GPS=null;
    find_gps_compass();
//    echo "compass: ";var_dump($compass);echo "\n";
//    echo "GPS:     ";var_dump($GPS);echo "\n";
   if ((!$compass || !$GPS) && ((exec('date +%s')+0) <30)) {
          echo "waiting $wait_time sec for USB devices to start up\n";
          sleep($wait_time);
          echo "Retrying detection\n";
          find_gps_compass();
    }
//    echo "compass: ";var_dump($compass);echo "\n";
//    echo "GPS:     ";var_dump($GPS);echo "\n";
    $noGPS=    ($compass || $GPS)?"" : "noGPS"; 
    $nocompass=($compass)?"" : "nocompass"; 
    $cmd="/usr/html/exif.php init $noGPS $nocompass";
    echo "Initializing Exif template: $cmd\n";
    exec($cmd);
// kill those GPS and compass if they are running already
    exec("killall -q garminusb2exif");
    exec("killall -q compass");
    if ($GPS) {
      echo "Starting ".$GPS["name"]. " as ". $GPS["file"]. "\n";
      $cmd ="/usr/local/bin/garminusb2exif ". $GPS["file"]." &";
      echo "exec: $cmd \n";
      popen($cmd,"r");
    }
    if ($compass) {
      echo "Starting ".$compass["name"]. " as ". $compass["file"]. "\n";
      exec ("stty -F ".$compass["file"]." -echo speed 19200");
      $cmd="/usr/local/bin/compass ". $compass["file"]." &";
      echo "exec: $cmd \n";
      popen($cmd,"r");
    }
    exit (($compass?2:0) | ($GPS?1:0));

 function find_gps_compass() {
    global $GPS, $compass;
    $devices=array(
              "compass"=>array(array("name"=>"Ocean Server OS-5000","driver"=>"cp2101")),
              "GPS"    =>array(array("name"=>"Garmin GPS 18 USB","driver"=>"garmin_gps")));
    exec("ls /sys/bus/usb-serial/devices",$usb_ser_devs); // ("ttyUSB0","ttyUSB1")
    $devs = new SimpleXMLElement("<?xml version='1.0' standalone='yes'?><USB_serial_devices/>");
    
    foreach ($usb_ser_devs as $dev) {
      $arr=split("/",exec("ls /sys/bus/usb-serial/devices/".$dev."/driver -l"));
      $driver=$arr[count($arr)-1];
      foreach ($devices["compass"] as $d) {
        if ($d["driver"]==$driver) {
          $dd=$devs->addChild ('compass');
          $dd->addChild ('name',$d["name"]);
          $dd->addChild ('driver',$d["driver"]);
          $dd->addChild ('file',"/dev/".$dev);
        }
      }
      foreach ($devices["GPS"] as $d) {
        if ($d["driver"]==$driver) {
          $dd=$devs->addChild ('GPS');
          $dd->addChild ('name',$d["name"]);
          $dd->addChild ('driver',$d["driver"]);
          $dd->addChild ('file',"/dev/".$dev);
        }
      }
    }
//    var_dump($devs);
    $state_file=fopen("/var/html/gps_compass.xml","w");
    fwrite($state_file,$devs->asXML());
    fclose($state_file);

// start here from XML
    foreach ($devs->compass as $a) {
      $compass=array("file"=>(string) $a->file, "name"=> (string) $a->name);
      break; // use first one
    }
    foreach ($devs->GPS as $a) {
      $GPS=array("file"=>(string) $a->file, "name"=> (string) $a->name);
      break; // use first one
    }
}
  
//ls /sys/bus/usb-serial/devices/ttyUSB0/driver -l
//         $xml->addChild ('error','No sync capable board detected, use "role=self" for the onboard timer');
//    $sxml=$xml->asXML();
?>

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