[libsigrok.git] / hardware / common / serial.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
 *
 * 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/>.
 */

#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <glob.h>
#include <termios.h>
#endif
#include <stdlib.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"

// FIXME: Must be moved, or rather passed as function argument.
#ifdef _WIN32
static HANDLE hdl;
#endif

static const char *serial_port_glob[] = {
	/* Linux */
	"/dev/ttyS*",
	"/dev/ttyUSB*",
	"/dev/ttyACM*",
	/* MacOS X */
	"/dev/ttys*",
	"/dev/tty.USB-*",
	"/dev/tty.Modem-*",
	NULL,
};

SR_PRIV GSList *list_serial_ports(void)
{
	GSList *ports;

#ifdef _WIN32
	/* TODO */
	ports = NULL;
	ports = g_slist_append(ports, g_strdup("COM1"));
#else
	glob_t g;
	unsigned int i, j;

	ports = NULL;
	for (i = 0; serial_port_glob[i]; i++) {
		if (glob(serial_port_glob[i], 0, NULL, &g))
			continue;
		for (j = 0; j < g.gl_pathc; j++)
			ports = g_slist_append(ports, g_strdup(g.gl_pathv[j]));
		globfree(&g);
	}
#endif

	return ports;
}

SR_PRIV int serial_open(const char *pathname, int flags)
{
#ifdef _WIN32
	/* FIXME: Don't hardcode COM1. */
	hdl = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, 0,
			 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
	if (hdl == INVALID_HANDLE_VALUE) {
		/* TODO: Error handling. */
	}
	return 0;
#else
	return open(pathname, flags);
#endif
}

/*
 * Close the serial port.
 * Returns 0 upon success, -1 upon failure.
 */
SR_PRIV int serial_close(int fd)
{
#ifdef _WIN32
	/* Returns non-zero upon success, 0 upon failure. */
	return (CloseHandle(hdl) == 0) ? -1 : 0;
#else
	/* Returns 0 upon success, -1 upon failure. */
	return close(fd);
#endif
}

/*
 * Flush serial port buffers (if any).
 * Returns 0 upon success, -1 upon failure.
 */
SR_PRIV int serial_flush(int fd)
{
#ifdef _WIN32
	/* Returns non-zero upon success, 0 upon failure. */
	return (PurgeComm(hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) ? -1 : 0;
#else
	/* Returns 0 upon success, -1 upon failure. */
	return tcflush(fd, TCIOFLUSH);
#endif
}

/*
 * Write a number of bytes to the specified serial port.
 * Returns the number of bytes written, or -1 upon failure.
 */
SR_PRIV int serial_write(int fd, const void *buf, size_t count)
{
#ifdef _WIN32
	DWORD tmp = 0;

	/* FIXME */
	/* Returns non-zero upon success, 0 upon failure. */
	WriteFile(hdl, buf, count, &tmp, NULL);
#else
	/* Returns the number of bytes written, or -1 upon failure. */
	return write(fd, buf, count);
#endif
}

/*
 * Read a number of bytes from the specified serial port.
 * Returns the number of bytes read, or -1 upon failure.
 */
SR_PRIV int serial_read(int fd, void *buf, size_t count)
{
#ifdef _WIN32
	DWORD tmp = 0;

	/* FIXME */
	/* Returns non-zero upon success, 0 upon failure. */
	return ReadFile(hdl, buf, count, &tmp, NULL);
#else
	/* Returns the number of bytes read, or -1 upon failure. */
	return read(fd, buf, count);
#endif
}

SR_PRIV void *serial_backup_params(int fd)
{
#ifdef _WIN32
	/* TODO */
#else
	struct termios *term;

	/* TODO: 'term' is never g_free()'d? */
	if (!(term = g_try_malloc(sizeof(struct termios)))) {
		sr_err("serial: %s: term malloc failed", __func__);
		return NULL;
	}

	tcgetattr(fd, term);

	return term;
#endif
}

SR_PRIV void serial_restore_params(int fd, void *backup)
{
#ifdef _WIN32
	/* TODO */
#else
	tcsetattr(fd, TCSADRAIN, (struct termios *)backup);
#endif
}

/*
 * Set serial parameters.
 *
 * flowcontrol: 1 = rts/cts, 2 = xon/xoff
 * parity: 0 = none, 1 = even, 2 = odd
 */
SR_PRIV int serial_set_params(int fd, int baudrate, int bits, int parity,
			      int stopbits, int flowcontrol)
{
#ifdef _WIN32
	DCB dcb;

	if (!GetCommState(hdl, &dcb)) {
		/* TODO: Error handling. */
		return SR_ERR;
	}

	switch (baudrate) {
	/* TODO: Support for higher baud rates. */
	case 115200:
		dcb.BaudRate = CBR_115200;
		break;
	case 57600:
		dcb.BaudRate = CBR_57600;
		break;
	case 38400:
		dcb.BaudRate = CBR_38400;
		break;
	case 19200:
		dcb.BaudRate = CBR_19200;
		break;
	case 9600:
		dcb.BaudRate = CBR_9600;
		break;
	case 4800:
		dcb.BaudRate = CBR_4800;
		break;
	case 2400:
		dcb.BaudRate = CBR_2400;
		break;
	default:
		/* TODO: Error handling. */
		break;
	}
	dcb.ByteSize = bits;
	dcb.Parity = NOPARITY; /* TODO: Don't hardcode. */
	dcb.StopBits = ONESTOPBIT; /* TODO: Don't hardcode. */

	if (!SetCommState(hdl, &dcb)) {
		/* TODO: Error handling. */
		return SR_ERR;
	}
#else
	struct termios term;
	speed_t baud;

	if (tcgetattr(fd, &term) < 0)
		return SR_ERR;

	switch (baudrate) {
	case 2400:
		baud = B2400;
		break;
	case 4800:
		baud = B4800;
		break;
	case 9600:
		baud = B9600;
		break;
	case 38400:
		baud = B38400;
		break;
	case 57600:
		baud = B57600;
		break;
	case 115200:
		baud = B115200;
		break;
#ifndef __APPLE__
	case 460800:
		baud = B460800;
		break;
#endif
	default:
		return SR_ERR;
	}
	if (cfsetospeed(&term, baud) < 0)
		return SR_ERR;
	if (cfsetispeed(&term, baud) < 0)
		return SR_ERR;

	term.c_cflag &= ~CSIZE;
	switch (bits) {
	case 8:
		term.c_cflag |= CS8;
		break;
	case 7:
		term.c_cflag |= CS7;
		break;
	default:
		return SR_ERR;
	}

	term.c_cflag &= ~CSTOPB;
	switch (stopbits) {
	case 1:
		break;
	case 2:
		term.c_cflag |= CSTOPB;
	default:
		return SR_ERR;
	}

	term.c_iflag &= ~(IXON | IXOFF);
	term.c_cflag &= ~CRTSCTS;
	switch (flowcontrol) {
	case 0:
		/* No flow control. */
		break;
	case 1:
		term.c_cflag |= CRTSCTS;
	case 2:
		term.c_iflag |= IXON | IXOFF;
		break;
	default:
		return SR_ERR;
	}

	term.c_iflag &= ~IGNPAR;
	term.c_cflag &= ~(PARODD | PARENB);
	switch (parity) {
	case SERIAL_PARITY_NONE:
		term.c_iflag |= IGNPAR;
		break;
	case SERIAL_PARITY_EVEN:
		term.c_cflag |= PARENB;
		break;
	case SERIAL_PARITY_ODD:
		term.c_cflag |= PARENB | PARODD;
		break;
	default:
		return SR_ERR;
	}

	/* Some default parameters */
	term.c_iflag &= ~(ICRNL);
	term.c_lflag &= ~(ICANON | ECHO);

	if (tcsetattr(fd, TCSADRAIN, &term) < 0)
		return SR_ERR;
#endif

	return SR_OK;
}

#define SERIAL_COMM_SPEC "^(\\d+)/([78])([neo])([12])$"
SR_PRIV int serial_set_paramstr(int fd, const char *paramstr)
{
	GRegex *reg;
	GMatchInfo *match;
	int speed, databits, parity, stopbits;
	char *mstr;

	speed = databits = parity = stopbits = 0;
	reg = g_regex_new(SERIAL_COMM_SPEC, 0, 0, NULL);
	if (g_regex_match(reg, paramstr, 0, &match)) {
		if ((mstr = g_match_info_fetch(match, 1)))
			speed = strtoul(mstr, NULL, 10);
		g_free(mstr);
		if ((mstr = g_match_info_fetch(match, 2)))
			databits = strtoul(mstr, NULL, 10);
		g_free(mstr);
		if ((mstr = g_match_info_fetch(match, 3))) {
			switch (mstr[0]) {
			case 'n':
				parity = SERIAL_PARITY_NONE;
				break;
			case 'e':
				parity = SERIAL_PARITY_EVEN;
				break;
			case 'o':
				parity = SERIAL_PARITY_ODD;
				break;
			}
		}
		g_free(mstr);
		if ((mstr = g_match_info_fetch(match, 4)))
			stopbits = strtoul(mstr, NULL, 10);
		g_free(mstr);
	}
	g_match_info_unref(match);
	g_regex_unref(reg);

	if (speed)
		return serial_set_params(fd, speed, databits, parity, stopbits, 0);
	else
		return SR_ERR_ARG;
}
Commit	Line	Data
a1bb33af UH	1	/*
	2	* This file is part of the sigrok project.
	3	*
c73d2ea4	4	* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
a1bb33af UH	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
54b38f64	20	#include <string.h>
d02a535e BV	21	#include <sys/types.h>
	22	#include <sys/stat.h>
	23	#include <fcntl.h>
	24	#include <unistd.h>
926b866c	25	#ifdef _WIN32
a9f54bcd	26	#include <windows.h>
926b866c UH	27	#else
926b866c UH	28	#include <glob.h>
d02a535e	29	#include <termios.h>
926b866c	30	#endif
d02a535e	31	#include <stdlib.h>
a1bb33af	32	#include <glib.h>
45c59c8b BV	33	#include "libsigrok.h"
45c59c8b BV	34	#include "libsigrok-internal.h"
a1bb33af	35
926b866c UH	36	// FIXME: Must be moved, or rather passed as function argument.
926b866c UH	37	#ifdef _WIN32
a0ecd83b	38	static HANDLE hdl;
926b866c UH	39	#endif
926b866c UH	40
1a081ca6	41	static const char *serial_port_glob[] = {
a1bb33af UH	42	/* Linux */
	43	"/dev/ttyS*",
	44	"/dev/ttyUSB*",
	45	"/dev/ttyACM*",
	46	/* MacOS X */
	47	"/dev/ttys*",
	48	"/dev/tty.USB-*",
	49	"/dev/tty.Modem-*",
986f7270	50	NULL,
a1bb33af UH	51	};
a1bb33af UH	52
1a081ca6	53	SR_PRIV GSList *list_serial_ports(void)
a1bb33af	54	{
2119ab03 UH	55	GSList *ports;
2119ab03 UH	56
926b866c UH	57	#ifdef _WIN32
926b866c UH	58	/* TODO */
2119ab03	59	ports = NULL;
133a37bf	60	ports = g_slist_append(ports, g_strdup("COM1"));
926b866c	61	#else
a1bb33af	62	glob_t g;
afc8e4de	63	unsigned int i, j;
a1bb33af UH	64
a1bb33af UH	65	ports = NULL;
986f7270	66	for (i = 0; serial_port_glob[i]; i++) {
71dda106 PS	67	if (glob(serial_port_glob[i], 0, NULL, &g))
	68	continue;
	69	for (j = 0; j < g.gl_pathc; j++)
133a37bf	70	ports = g_slist_append(ports, g_strdup(g.gl_pathv[j]));
71dda106	71	globfree(&g);
a1bb33af	72	}
2119ab03	73	#endif
a1bb33af UH	74
	75	return ports;
	76	}
	77
1a081ca6	78	SR_PRIV int serial_open(const char *pathname, int flags)
d02a535e	79	{
926b866c UH	80	#ifdef _WIN32
	81	/* FIXME: Don't hardcode COM1. */
	82	hdl = CreateFile("COM1", GENERIC_READ \| GENERIC_WRITE, 0, 0,
	83	OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
	84	if (hdl == INVALID_HANDLE_VALUE) {
	85	/* TODO: Error handling. */
	86	}
	87	return 0;
	88	#else
d02a535e	89	return open(pathname, flags);
926b866c	90	#endif
d02a535e BV	91	}
d02a535e BV	92
2119ab03 UH	93	/*
	94	* Close the serial port.
	95	* Returns 0 upon success, -1 upon failure.
	96	*/
1a081ca6	97	SR_PRIV int serial_close(int fd)
d02a535e	98	{
926b866c	99	#ifdef _WIN32
2119ab03 UH	100	/* Returns non-zero upon success, 0 upon failure. */
2119ab03 UH	101	return (CloseHandle(hdl) == 0) ? -1 : 0;
926b866c	102	#else
2119ab03	103	/* Returns 0 upon success, -1 upon failure. */
d02a535e	104	return close(fd);
926b866c	105	#endif
d02a535e BV	106	}
d02a535e BV	107
1fdb75e1 UH	108	/*
	109	* Flush serial port buffers (if any).
	110	* Returns 0 upon success, -1 upon failure.
	111	*/
1a081ca6	112	SR_PRIV int serial_flush(int fd)
06d64eb8	113	{
1fdb75e1 UH	114	#ifdef _WIN32
1fdb75e1 UH	115	/* Returns non-zero upon success, 0 upon failure. */
2119ab03	116	return (PurgeComm(hdl, PURGE_RXCLEAR \| PURGE_TXCLEAR) == 0) ? -1 : 0;
1fdb75e1 UH	117	#else
1fdb75e1 UH	118	/* Returns 0 upon success, -1 upon failure. */
f0551a65	119	return tcflush(fd, TCIOFLUSH);
1fdb75e1	120	#endif
06d64eb8 BV	121	}
06d64eb8 BV	122
2119ab03 UH	123	/*
	124	* Write a number of bytes to the specified serial port.
	125	* Returns the number of bytes written, or -1 upon failure.
	126	*/
1a081ca6	127	SR_PRIV int serial_write(int fd, const void *buf, size_t count)
2119ab03 UH	128	{
	129	#ifdef _WIN32
	130	DWORD tmp = 0;
	131
	132	/* FIXME */
	133	/* Returns non-zero upon success, 0 upon failure. */
	134	WriteFile(hdl, buf, count, &tmp, NULL);
	135	#else
	136	/* Returns the number of bytes written, or -1 upon failure. */
	137	return write(fd, buf, count);
	138	#endif
	139	}
	140
	141	/*
	142	* Read a number of bytes from the specified serial port.
	143	* Returns the number of bytes read, or -1 upon failure.
	144	*/
1a081ca6	145	SR_PRIV int serial_read(int fd, void *buf, size_t count)
2119ab03 UH	146	{
	147	#ifdef _WIN32
	148	DWORD tmp = 0;
	149
	150	/* FIXME */
	151	/* Returns non-zero upon success, 0 upon failure. */
	152	return ReadFile(hdl, buf, count, &tmp, NULL);
	153	#else
	154	/* Returns the number of bytes read, or -1 upon failure. */
	155	return read(fd, buf, count);
	156	#endif
	157	}
	158
1a081ca6	159	SR_PRIV void *serial_backup_params(int fd)
d02a535e	160	{
926b866c UH	161	#ifdef _WIN32
	162	/* TODO */
	163	#else
d02a535e BV	164	struct termios *term;
d02a535e BV	165
c548332c UH	166	/* TODO: 'term' is never g_free()'d? */
	167	if (!(term = g_try_malloc(sizeof(struct termios)))) {
	168	sr_err("serial: %s: term malloc failed", __func__);
	169	return NULL;
	170	}
	171
d02a535e BV	172	tcgetattr(fd, term);
	173
	174	return term;
926b866c	175	#endif
d02a535e BV	176	}
d02a535e BV	177
1a081ca6	178	SR_PRIV void serial_restore_params(int fd, void *backup)
d02a535e	179	{
926b866c UH	180	#ifdef _WIN32
	181	/* TODO */
	182	#else
986f7270	183	tcsetattr(fd, TCSADRAIN, (struct termios *)backup);
926b866c	184	#endif
d02a535e BV	185	}
d02a535e BV	186
1ff7712c	187	/*
2119ab03 UH	188	* Set serial parameters.
	189	*
	190	* flowcontrol: 1 = rts/cts, 2 = xon/xoff
	191	* parity: 0 = none, 1 = even, 2 = odd
1ff7712c	192	*/
0abee507	193	SR_PRIV int serial_set_params(int fd, int baudrate, int bits, int parity,
1a081ca6	194	int stopbits, int flowcontrol)
d02a535e	195	{
926b866c UH	196	#ifdef _WIN32
	197	DCB dcb;
	198
	199	if (!GetCommState(hdl, &dcb)) {
	200	/* TODO: Error handling. */
e46b8fb1	201	return SR_ERR;
926b866c UH	202	}
926b866c UH	203
0abee507	204	switch (baudrate) {
1fdb75e1	205	/* TODO: Support for higher baud rates. */
926b866c UH	206	case 115200:
	207	dcb.BaudRate = CBR_115200;
	208	break;
	209	case 57600:
	210	dcb.BaudRate = CBR_57600;
	211	break;
	212	case 38400:
	213	dcb.BaudRate = CBR_38400;
	214	break;
	215	case 19200:
	216	dcb.BaudRate = CBR_19200;
	217	break;
	218	case 9600:
	219	dcb.BaudRate = CBR_9600;
	220	break;
e8e9dcdd AG	221	case 4800:
	222	dcb.BaudRate = CBR_4800;
	223	break;
0f708301 AG	224	case 2400:
	225	dcb.BaudRate = CBR_2400;
	226	break;
926b866c UH	227	default:
	228	/* TODO: Error handling. */
	229	break;
	230	}
	231	dcb.ByteSize = bits;
	232	dcb.Parity = NOPARITY; /* TODO: Don't hardcode. */
	233	dcb.StopBits = ONESTOPBIT; /* TODO: Don't hardcode. */
	234
	235	if (!SetCommState(hdl, &dcb)) {
	236	/* TODO: Error handling. */
e46b8fb1	237	return SR_ERR;
926b866c UH	238	}
926b866c UH	239	#else
d02a535e	240	struct termios term;
1ff7712c	241	speed_t baud;
d02a535e	242
6a6e23ab BV	243	if (tcgetattr(fd, &term) < 0)
	244	return SR_ERR;
	245
0abee507	246	switch (baudrate) {
0f708301 AG	247	case 2400:
	248	baud = B2400;
	249	break;
e8e9dcdd AG	250	case 4800:
	251	baud = B4800;
	252	break;
1ff7712c DR	253	case 9600:
	254	baud = B9600;
	255	break;
	256	case 38400:
	257	baud = B38400;
	258	break;
	259	case 57600:
	260	baud = B57600;
	261	break;
	262	case 115200:
	263	baud = B115200;
	264	break;
9a751023	265	#ifndef __APPLE__
1ff7712c DR	266	case 460800:
	267	baud = B460800;
	268	break;
9a751023	269	#endif
1ff7712c	270	default:
e46b8fb1	271	return SR_ERR;
1ff7712c	272	}
6a6e23ab	273	if (cfsetospeed(&term, baud) < 0)
e46b8fb1	274	return SR_ERR;
1ff7712c	275	if (cfsetispeed(&term, baud) < 0)
e46b8fb1	276	return SR_ERR;
1ff7712c	277
d02a535e	278	term.c_cflag &= ~CSIZE;
1ff7712c DR	279	switch (bits) {
	280	case 8:
	281	term.c_cflag \|= CS8;
	282	break;
	283	case 7:
	284	term.c_cflag \|= CS7;
	285	break;
	286	default:
e46b8fb1	287	return SR_ERR;
1ff7712c DR	288	}
1ff7712c DR	289
d02a535e	290	term.c_cflag &= ~CSTOPB;
1ff7712c DR	291	switch (stopbits) {
	292	case 1:
	293	break;
	294	case 2:
	295	term.c_cflag \|= CSTOPB;
	296	default:
e46b8fb1	297	return SR_ERR;
1ff7712c DR	298	}
1ff7712c DR	299
f38b9763 BV	300	term.c_iflag &= ~(IXON \| IXOFF);
f38b9763 BV	301	term.c_cflag &= ~CRTSCTS;
1ff7712c	302	switch (flowcontrol) {
f38b9763 BV	303	case 0:
f38b9763 BV	304	/* No flow control. */
1ff7712c DR	305	break;
	306	case 1:
	307	term.c_cflag \|= CRTSCTS;
f38b9763 BV	308	case 2:
	309	term.c_iflag \|= IXON \| IXOFF;
	310	break;
1ff7712c	311	default:
e46b8fb1	312	return SR_ERR;
1ff7712c DR	313	}
1ff7712c DR	314
ac4a2ea4 DR	315	term.c_iflag &= ~IGNPAR;
ac4a2ea4 DR	316	term.c_cflag &= ~(PARODD \| PARENB);
1ff7712c	317	switch (parity) {
f8c1fcda	318	case SERIAL_PARITY_NONE:
1ff7712c DR	319	term.c_iflag \|= IGNPAR;
1ff7712c DR	320	break;
f8c1fcda	321	case SERIAL_PARITY_EVEN:
ac4a2ea4	322	term.c_cflag \|= PARENB;
1ff7712c	323	break;
f8c1fcda	324	case SERIAL_PARITY_ODD:
ac4a2ea4	325	term.c_cflag \|= PARENB \| PARODD;
1ff7712c DR	326	break;
1ff7712c DR	327	default:
e46b8fb1	328	return SR_ERR;
1ff7712c DR	329	}
1ff7712c DR	330
5c51e098	331	/* Some default parameters */
fb9d3bf9	332	term.c_iflag &= ~(ICRNL);
5c51e098 BV	333	term.c_lflag &= ~(ICANON \| ECHO);
5c51e098 BV	334
986f7270	335	if (tcsetattr(fd, TCSADRAIN, &term) < 0)
e46b8fb1	336	return SR_ERR;
926b866c	337	#endif
d02a535e	338
e46b8fb1	339	return SR_OK;
d02a535e	340	}
792fc686 BV	341
	342	#define SERIAL_COMM_SPEC "^(\\d+)/([78])([neo])([12])$"
	343	SR_PRIV int serial_set_paramstr(int fd, const char *paramstr)
	344	{
	345	GRegex *reg;
	346	GMatchInfo *match;
	347	int speed, databits, parity, stopbits;
	348	char *mstr;
	349
	350	speed = databits = parity = stopbits = 0;
	351	reg = g_regex_new(SERIAL_COMM_SPEC, 0, 0, NULL);
	352	if (g_regex_match(reg, paramstr, 0, &match)) {
	353	if ((mstr = g_match_info_fetch(match, 1)))
	354	speed = strtoul(mstr, NULL, 10);
	355	g_free(mstr);
	356	if ((mstr = g_match_info_fetch(match, 2)))
	357	databits = strtoul(mstr, NULL, 10);
	358	g_free(mstr);
	359	if ((mstr = g_match_info_fetch(match, 3))) {
	360	switch (mstr[0]) {
	361	case 'n':
	362	parity = SERIAL_PARITY_NONE;
	363	break;
	364	case 'e':
	365	parity = SERIAL_PARITY_EVEN;
	366	break;
	367	case 'o':
	368	parity = SERIAL_PARITY_ODD;
	369	break;
	370	}
	371	}
	372	g_free(mstr);
	373	if ((mstr = g_match_info_fetch(match, 4)))
	374	stopbits = strtoul(mstr, NULL, 10);
	375	g_free(mstr);
	376	}
	377	g_match_info_unref(match);
	378	g_regex_unref(reg);
	379
	380	if (speed)
	381	return serial_set_params(fd, speed, databits, parity, stopbits, 0);
	382	else
	383	return SR_ERR_ARG;
	384	}
	385