summaryrefslogtreecommitdiff
path: root/trunk/users/erik/classes/php_serial.class.php
blob: 6e0e17d6928631001b2aa9eb62e198e7e929ea02 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
<?php
define ("SERIAL_DEVICE_NOTSET", 0);
define ("SERIAL_DEVICE_SET", 1);
define ("SERIAL_DEVICE_OPENED", 2);

/**
 * Serial port control class
 *
 * THIS PROGRAM COMES WITH ABSOLUTELY NO WARANTIES !
 * USE IT AT YOUR OWN RISKS !
 *
 * @author Rémy Sanchez <thenux@gmail.com>
 * @thanks Aurélien Derouineau for finding how to open serial ports with windows
 * @thanks Alec Avedisyan for help and testing with reading
 * @copyright under GPL 2 licence
 */
class phpSerial
{
	var $_device = null;
	var $_windevice = null;
	var $_dHandle = null;
	var $_dState = SERIAL_DEVICE_NOTSET;
	var $_buffer = "";
	var $_os = "";

	/**
	 * This var says if buffer should be flushed by sendMessage (true) or manualy (false)
	 *
	 * @var bool
	 */
	var $autoflush = true;

	/**
	 * Constructor. Perform some checks about the OS and setserial
	 *
	 * @return phpSerial
	 */
	function phpSerial ()
	{
		setlocale(LC_ALL, "en_US");

		$sysname = php_uname();

		if (substr($sysname, 0, 5) === "Linux")
		{
			$this->_os = "linux";

			if($this->_exec("stty --version") === 0)
			{
				register_shutdown_function(array($this, "deviceClose"));
			}
			else
			{
				trigger_error("No stty availible, unable to run.", E_USER_ERROR);
			}
		}
		elseif(substr($sysname, 0, 7) === "Windows")
		{
			$this->_os = "windows";
			register_shutdown_function(array($this, "deviceClose"));
		}
		else
		{
			trigger_error("Host OS is neither linux nor windows, unable tu run.", E_USER_ERROR);
			exit();
		}
	}

	//
	// OPEN/CLOSE DEVICE SECTION -- {START}
	//

	/**
	 * Device set function : used to set the device name/address.
	 * -> linux : use the device address, like /dev/ttyS0
	 * -> windows : use the COMxx device name, like COM1 (can also be used
	 *     with linux)
	 *
	 * @param string $device the name of the device to be used
	 * @return bool
	 */
	function deviceSet ($device)
	{
		if ($this->_dState !== SERIAL_DEVICE_OPENED)
		{
			if ($this->_os === "linux")
			{
				if (preg_match("@^COM(\d+):?$@i", $device, $matches))
				{
					$device = "/dev/ttyS" . ($matches[1] - 1);
				}

				if ($this->_exec("stty -F " . $device) === 0)
				{
					$this->_device = $device;
					$this->_dState = SERIAL_DEVICE_SET;
					return true;
				}
			}
			elseif ($this->_os === "windows")
			{
				if (preg_match("@^COM(\d+):?$@i", $device, $matches) and $this->_exec(exec("mode " . $device)) === 0)
				{
					$this->_windevice = "COM" . $matches[1];
					$this->_device = "\\.\com" . $matches[1];
					$this->_dState = SERIAL_DEVICE_SET;
					return true;
				}
			}

			trigger_error("Specified serial port is not valid", E_USER_WARNING);
			return false;
		}
		else
		{
			trigger_error("You must close your device before to set an other one", E_USER_WARNING);
			return false;
		}
	}

	/**
	 * Opens the device for reading and/or writing.
	 *
	 * @param string $mode Opening mode : same parameter as fopen()
	 * @return bool
	 */
	function deviceOpen ($mode = "r+b")
	{
		if ($this->_dState === SERIAL_DEVICE_OPENED)
		{
			trigger_error("The device is already opened", E_USER_NOTICE);
			return true;
		}

		if ($this->_dState === SERIAL_DEVICE_NOTSET)
		{
			trigger_error("The device must be set before to be open", E_USER_WARNING);
			return false;
		}

		if (!preg_match("@^[raw]\+?b?$@", $mode))
		{
			trigger_error("Invalid opening mode : ".$mode.". Use fopen() modes.", E_USER_WARNING);
			return false;
		}

		$this->_dHandle = @fopen($this->_device, $mode);

		if ($this->_dHandle !== false)
		{
			stream_set_blocking($this->_dHandle, 0);
			$this->_dState = SERIAL_DEVICE_OPENED;
			return true;
		}

		$this->_dHandle = null;
		trigger_error("Unable to open the device", E_USER_WARNING);
		return false;
	}

	/**
	 * Closes the device
	 *
	 * @return bool
	 */
	function deviceClose ()
	{
		if ($this->_dState !== SERIAL_DEVICE_OPENED)
		{
			return true;
		}

		if (fclose($this->_dHandle))
		{
			$this->_dHandle = null;
			$this->_dState = SERIAL_DEVICE_SET;
			return true;
		}

		trigger_error("Unable to close the device", E_USER_ERROR);
		return false;
	}

	//
	// OPEN/CLOSE DEVICE SECTION -- {STOP}
	//

	//
	// CONFIGURE SECTION -- {START}
	//

	/**
	 * Configure the Baud Rate
	 * Possible rates : 110, 150, 300, 600, 1200, 2400, 4800, 9600, 38400,
	 * 57600 and 115200.
	 *
	 * @param int $rate the rate to set the port in
	 * @return bool
	 */
	function confBaudRate ($rate)
	{
		if ($this->_dState !== SERIAL_DEVICE_SET)
		{
			trigger_error("Unable to set the baud rate : the device is either not set or opened", E_USER_WARNING);
			return false;
		}

		$validBauds = array (
			110    => 11,
			150    => 15,
			300    => 30,
			600    => 60,
			1200   => 12,
			2400   => 24,
			4800   => 48,
			9600   => 96,
			19200  => 19,
			38400  => 38400,
			57600  => 57600,
			115200 => 115200
		);

		if (isset($validBauds[$rate]))
		{
			if ($this->_os === "linux")
			{
				$ret = $this->_exec("stty -F " . $this->_device . " " . (int) $rate, $out);
			}
			elseif ($this->_os === "windows")
			{
				$ret = $this->_exec("mode " . $this->_windevice . " BAUD=" . $validBauds[$rate], $out);
			}
			else return false;

			if ($ret !== 0)
			{
				trigger_error ("Unable to set baud rate: " . $out[1], E_USER_WARNING);
				return false;
			}
		}
	}

	/**
	 * Configure parity.
	 * Modes : odd, even, none
	 *
	 * @param string $parity one of the modes
	 * @return bool
	 */
	function confParity ($parity)
	{
		if ($this->_dState !== SERIAL_DEVICE_SET)
		{
			trigger_error("Unable to set parity : the device is either not set or opened", E_USER_WARNING);
			return false;
		}

		$args = array(
			"none" => "-parenb",
			"odd"  => "parenb parodd",
			"even" => "parenb -parodd",
		);

		if (!isset($args[$parity]))
		{
			trigger_error("Parity mode not supported", E_USER_WARNING);
			return false;
		}

		if ($this->_os === "linux")
		{
			$ret = $this->_exec("stty -F " . $this->_device . " " . $args[$parity], $out);
		}
		else
		{
			$ret = $this->_exec("mode " . $this->_windevice . " PARITY=" . $parity{0}, $out);
		}

		if ($ret === 0)
		{
			return true;
		}

		trigger_error("Unable to set parity : " . $out[1], E_USER_WARNING);
		return false;
	}

	/**
	 * Sets the length of a character.
	 *
	 * @param int $int length of a character (5 <= length <= 8)
	 * @return bool
	 */
	function confCharacterLength ($int)
	{
		if ($this->_dState !== SERIAL_DEVICE_SET)
		{
			trigger_error("Unable to set length of a character : the device is either not set or opened", E_USER_WARNING);
			return false;
		}

		$int = (int) $int;
		if ($int < 5) $int = 5;
		elseif ($int > 8) $int = 8;

		if ($this->_os === "linux")
		{
			$ret = $this->_exec("stty -F " . $this->_device . " cs" . $int, $out);
		}
		else
		{
			$ret = $this->_exec("mode " . $this->_windevice . " DATA=" . $int, $out);
		}

		if ($ret === 0)
		{
			return true;
		}

		trigger_error("Unable to set character length : " .$out[1], E_USER_WARNING);
		return false;
	}

	/**
	 * Sets the length of stop bits.
	 *
	 * @param float $length the length of a stop bit. It must be either 1,
	 * 1.5 or 2. 1.5 is not supported under linux and on some computers.
	 * @return bool
	 */
	function confStopBits ($length)
	{
		if ($this->_dState !== SERIAL_DEVICE_SET)
		{
			trigger_error("Unable to set the length of a stop bit : the device is either not set or opened", E_USER_WARNING);
			return false;
		}

		if ($length != 1 and $length != 2 and $length != 1.5 and !($length == 1.5 and $this->_os === "linux"))
		{
			trigger_error("Specified stop bit length is invalid", E_USER_WARNING);
			return false;
		}

		if ($this->_os === "linux")
		{
			$ret = $this->_exec("stty -F " . $this->_device . " " . (($length == 1) ? "-" : "") . "cstopb", $out);
		}
		else
		{
			$ret = $this->_exec("mode " . $this->_windevice . " STOP=" . $length, $out);
		}

		if ($ret === 0)
		{
			return true;
		}

		trigger_error("Unable to set stop bit length : " . $out[1], E_USER_WARNING);
		return false;
	}

	/**
	 * Configures the flow control
	 *
	 * @param string $mode Set the flow control mode. Availible modes :
	 * 	-> "none" : no flow control
	 * 	-> "rts/cts" : use RTS/CTS handshaking
	 * 	-> "xon/xoff" : use XON/XOFF protocol
	 * @return bool
	 */
	function confFlowControl ($mode)
	{
		if ($this->_dState !== SERIAL_DEVICE_SET)
		{
			trigger_error("Unable to set flow control mode : the device is either not set or opened", E_USER_WARNING);
			return false;
		}

		$linuxModes = array(
			"none"     => "clocal -crtscts -ixon -ixoff",
			"rts/cts"  => "-clocal crtscts -ixon -ixoff",
			"xon/xoff" => "-clocal -crtscts ixon ixoff"
		);
		$windowsModes = array(
			"none"     => "xon=off octs=off rts=on",
			"rts/cts"  => "xon=off octs=on rts=hs",
			"xon/xoff" => "xon=on octs=off rts=on",
		);

		if ($mode !== "none" and $mode !== "rts/cts" and $mode !== "xon/xoff") {
			trigger_error("Invalid flow control mode specified", E_USER_ERROR);
			return false;
		}

		if ($this->_os === "linux")
			$ret = $this->_exec("stty -F " . $this->_device . " " . $linuxModes[$mode], $out);
		else
			$ret = $this->_exec("mode " . $this->_windevice . " " . $windowsModes[$mode], $out);

		if ($ret === 0) return true;
		else {
			trigger_error("Unable to set flow control : " . $out[1], E_USER_ERROR);
			return false;
		}
	}

	/**
	 * Sets a setserial parameter (cf man setserial)
	 * NO MORE USEFUL !
	 * 	-> No longer supported
	 * 	-> Only use it if you need it
	 *
	 * @param string $param parameter name
	 * @param string $arg parameter value
	 * @return bool
	 */
	function setSetserialFlag ($param, $arg = "")
	{
		if (!$this->_ckOpened()) return false;

		$return = exec ("setserial " . $this->_device . " " . $param . " " . $arg . " 2>&1");

		if ($return{0} === "I")
		{
			trigger_error("setserial: Invalid flag", E_USER_WARNING);
			return false;
		}
		elseif ($return{0} === "/")
		{
			trigger_error("setserial: Error with device file", E_USER_WARNING);
			return false;
		}
		else
		{
			return true;
		}
	}

	//
	// CONFIGURE SECTION -- {STOP}
	//

	//
	// I/O SECTION -- {START}
	//

	/**
	 * Sends a string to the device
	 *
	 * @param string $str string to be sent to the device
	 * @param float $waitForReply time to wait for the reply (in seconds)
	 */
	function sendMessage ($str, $waitForReply = 0.1)
	{
		$this->_buffer .= $str;

		if ($this->autoflush === true) $this->flush();

		usleep((int) ($waitForReply * 1000000));
	}

	/**
	 * Reads the port until no new datas are availible, then return the content.
	 *
	 * @pararm int $count number of characters to be read (will stop before
	 * 	if less characters are in the buffer)
	 * @return string
	 */
	function readPort ($count = 0)
	{
		if ($this->_dState !== SERIAL_DEVICE_OPENED)
		{
			trigger_error("Device must be opened to read it", E_USER_WARNING);
			return false;
		}

		if ($this->_os === "linux")
		{
			$content = ""; $i = 0;

			if ($count !== 0)
			{
				do {
					if ($i > $count) $content .= fread($this->_dHandle, ($count - $i));
					else $content .= fread($this->_dHandle, 128);
				} while (($i += 128) === strlen($content));
			}
			else
			{
				do {
					$content .= fread($this->_dHandle, 128);
				} while (($i += 128) === strlen($content));
			}

			return $content;
		}
		elseif ($this->_os === "windows")
		{
			/* Do nohting : not implented yet */
		}

		trigger_error("Reading serial port is not implemented for Windows", E_USER_WARNING);
		return false;
	}

	/**
	 * Flushes the output buffer
	 *
	 * @return bool
	 */
	function flush ()
	{
		if (!$this->_ckOpened()) return false;

		if (fwrite($this->_dHandle, $this->_buffer) !== false)
		{
			$this->_buffer = "";
			return true;
		}
		else
		{
			$this->_buffer = "";
			trigger_error("Error while sending message", E_USER_WARNING);
			return false;
		}
	}

	//
	// I/O SECTION -- {STOP}
	//

	//
	// INTERNAL TOOLKIT -- {START}
	//

	function _ckOpened()
	{
		if ($this->_dState !== SERIAL_DEVICE_OPENED)
		{
			trigger_error("Device must be opened", E_USER_WARNING);
			return false;
		}

		return true;
	}

	function _ckClosed()
	{
		if ($this->_dState !== SERIAL_DEVICE_CLOSED)
		{
			trigger_error("Device must be closed", E_USER_WARNING);
			return false;
		}

		return true;
	}

	function _exec($cmd, &$out = null)
	{
		$desc = array(
			1 => array("pipe", "w"),
			2 => array("pipe", "w")
		);

		$proc = proc_open($cmd, $desc, $pipes);

		$ret = stream_get_contents($pipes[1]);
		$err = stream_get_contents($pipes[2]);

		fclose($pipes[1]);
		fclose($pipes[2]);

		$retVal = proc_close($proc);

		if (func_num_args() == 2) $out = array($ret, $err);
		return $retVal;
	}

	//
	// INTERNAL TOOLKIT -- {STOP}
	//
}
?>