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File: irp_rxtxArduino.php

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  Classes of Marco Sillano  >  IRP Classes  >  irp_rxtxArduino.php  >  Download  
File: irp_rxtxArduino.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: IRP Classes
Send and receive infrared commands via serial port
Author: By
Last change:
Date: 4 years ago
Size: 4,026 bytes
 

Contents

Class file image Download
<?php
/*
  irp_extxArduino - Example for irp_classes (https://github.com/msillano/irp_classes)
  Copyright (c) 2017 Marco Sillano. All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
// using 'PHP Serial extension' free: TX/RX to/from Arduino in php
// see arduino/rawRxTx02.ino
function txArduino($raw)
  {
   
$arduinocom = 'COM3'; // TODO: change here if required
   
if (!ser_isopen())
       
ser_open($arduinocom, 9600, 8, "None", "1", "None");
   
//
   
if (!ser_isopen())
      {
        echo
"<div class=Error>";
        echo
"ERROR: '.$arduinocom.' not open ";
        echo
"</div>";
        exit;
      }
    echo
'+++ from Serial: ' . ser_version() . '<br>'; // to verify 1000 bytes limits
   
sleep(2);
   
$fromarduino = '';
   
// wait an 'A' from Arduino
   
do
      {
       
sleep(2);
       
$fromarduino = ser_read(); // handshake
     
} while (strpos($fromarduino, 'A') === false);
   
// echo 'start send <br>';
    // then send 'T' + data
   
ser_write('T'); // command: T
   
sleep(1);
   
ser_write($raw); // send data
 
}
// receive RAW fron Arduino
function rxArduino($protocol=NULL)
  {
   
$arduinocom = 'COM3'; // TODO: change here if required
   
if (!ser_isopen())
       
ser_open($arduinocom, 9600, 8, "None", "1", "None");
   
//
   
if (!ser_isopen())
      {
        echo
"<div class=Error>";
        echo
"ERROR: '.$arduinocom.' not open ";
        echo
"</div>";
        exit;
      }
    echo
'+++ from Serial: ' . ser_version() . '<br>';
   
sleep(2);
   
$fromarduino = '';
   
$RXstatus = 0;
   
// RX finite state Automata
   
while (true)
      {
       
sleep(2);
        switch (
$RXstatus)
        {
            case
0: // waiting 'A'
               
$fromarduino = ser_read();
               
// echo 'status 0, rx ='.$fromarduino.'<br>';
               
if (strpos($fromarduino, 'A') === false)
                    break;
               
$RXstatus = 1;
                break;
            case
1: // sends 'R' command
               
ser_write('R');
               
sleep(1);
               
$fromarduino = ser_read();
               
// echo 'status 1, rx ='.$fromarduino.'<br>';
               
$fromarduino = '';
               
sleep(2);
               
$RXstatus = 2;
                break;
            case
2: //collect all data
               
$fromarduino .= ser_read();
               
// echo 'status 2, rx ='.$fromarduino.'<br>';
               
if (strpos($fromarduino, '}') !== false)
                  {
                   
$RXstatus = 3; // end RAW
                   
break;
                  }
                if (
strpos($fromarduino, 'A') !== false)
                   
$RXstatus = 0; // restart
               
break;
            case
3: // done: format RAW and returns
               
$s = strpos($fromarduino, '={'); // start RAW
               
$e = strpos($fromarduino, '}'); // end RAW
               
if ($e > $s)
                    return
trim(substr($fromarduino, $s + 2, $e - $s - 2));
               
$e = strrpos($fromarduino, '}');
                if (
$e > $s)
                    return
trim(substr($fromarduino, $s + 2, $e - $s - 2));
               
$status = 0; // bad data, restart
       
}
      }
  }
?>

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