[libsigrok.git] / src / scpi / scpi_serial.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
 * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
 *
 * 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 <config.h>
#include <glib.h>
#include <stdlib.h>
#include <string.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#include "scpi.h"

#define LOG_PREFIX "scpi_serial"

#ifdef HAVE_SERIAL_COMM

struct scpi_serial {
	struct sr_serial_dev_inst *serial;
	gboolean got_newline;
};

/* Default serial port options for some known USB devices */
static const struct {
	uint16_t vendor_id;
	uint16_t product_id;
	const char *serialcomm;
} scpi_serial_usb_ids[] = {
	{ 0x0403, 0xed72, "115200/8n1/flow=1" }, /* Hameg HO720 */
	{ 0x0403, 0xed73, "115200/8n1/flow=1" }, /* Hameg HO730 */
	{ 0x0aad, 0x0117, "115200/8n1" },        /* R&S HMO series, previously branded as Hameg HMO */
	{ 0x0aad, 0x0118, "115200/8n1" },        /* R&S HMO series, previously branded as Hameg HMO */
	{ 0x0aad, 0x0119, "115200/8n1" },        /* R&S HMO series, previously branded as Hameg HMO */
	{ 0x2184, 0x0030, "115200/8n1" },        /* GW-Instek GDM-8341 (VCP, SiLabs CP210x) */
	{ 0x2184, 0x0058, "115200/8n1" },        /* GW-Instek GDM-9061 (USBCDC mode) */
};

static GSList *scpi_serial_scan(struct drv_context *drvc)
{
	GSList *l, *r, *resources = NULL;
	gchar *res;
	unsigned i;

	(void)drvc;

	for (i = 0; i < ARRAY_SIZE(scpi_serial_usb_ids); i++) {
		if (!(l = sr_serial_find_usb(scpi_serial_usb_ids[i].vendor_id,
					scpi_serial_usb_ids[i].product_id)))
			continue;
		for (r = l; r; r = r->next) {
			if (scpi_serial_usb_ids[i].serialcomm)
				res = g_strdup_printf("%s:%s", (char *) r->data,
				                      scpi_serial_usb_ids[i].serialcomm);
			else
				res = g_strdup(r->data);
			resources = g_slist_append(resources, res);
		}
		g_slist_free_full(l, g_free);
	}

	return resources;
}

static int scpi_serial_dev_inst_new(void *priv, struct drv_context *drvc,
		const char *resource, char **params, const char *serialcomm)
{
	GSList *l, *r;
	unsigned i;
	struct scpi_serial *sscpi = priv;

	(void)drvc;
	(void)params;

	/* If no serial port option is specified on the command-line using the
	 * "serialcomm" driver option, but the device is connected through USB
	 * and it requires a known default serial port option, then used it in
	 * order to avoid data corruption or even worse problems.
	 */
	if (!serialcomm) {
		for (i = 0; i < ARRAY_SIZE(scpi_serial_usb_ids); i++) {
			if (!(l = sr_serial_find_usb(scpi_serial_usb_ids[i].vendor_id,
						scpi_serial_usb_ids[i].product_id)))
				continue;
			for (r = l; r; r = r->next)
				if (!strcmp(resource, r->data) && scpi_serial_usb_ids[i].serialcomm)
					serialcomm = scpi_serial_usb_ids[i].serialcomm;
			g_slist_free_full(l, g_free);
		}
	}

	sscpi->serial = sr_serial_dev_inst_new(resource, serialcomm);

	return SR_OK;
}

static int scpi_serial_open(struct sr_scpi_dev_inst *scpi)
{
	struct scpi_serial *sscpi = scpi->priv;
	struct sr_serial_dev_inst *serial = sscpi->serial;

	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
		return SR_ERR;

	sscpi->got_newline = FALSE;

	return SR_OK;
}

static int scpi_serial_connection_id(struct sr_scpi_dev_inst *scpi,
		char **connection_id)
{
	struct scpi_serial *sscpi = scpi->priv;
	struct sr_serial_dev_inst *serial = sscpi->serial;

	*connection_id = g_strdup(serial->port);

	return SR_OK;
}

static int scpi_serial_source_add(struct sr_session *session, void *priv,
		int events, int timeout, sr_receive_data_callback cb, void *cb_data)
{
	struct scpi_serial *sscpi = priv;
	struct sr_serial_dev_inst *serial = sscpi->serial;

	return serial_source_add(session, serial, events, timeout, cb, cb_data);
}

static int scpi_serial_source_remove(struct sr_session *session, void *priv)
{
	struct scpi_serial *sscpi = priv;
	struct sr_serial_dev_inst *serial = sscpi->serial;

	return serial_source_remove(session, serial);
}

static int scpi_serial_send(void *priv, const char *command)
{
	int result;
	struct scpi_serial *sscpi = priv;
	struct sr_serial_dev_inst *serial = sscpi->serial;

	result = serial_write_blocking(serial, command, strlen(command), 0);
	if (result < 0) {
		sr_err("Error while sending SCPI command '%s': %d.",
			command, result);
		return SR_ERR;
	}

	sr_spew("Successfully sent SCPI command: '%s'.", command);

	return SR_OK;
}

static int scpi_serial_read_begin(void *priv)
{
	struct scpi_serial *sscpi = priv;
	sscpi->got_newline = FALSE;

	return SR_OK;
}

static int scpi_serial_read_data(void *priv, char *buf, int maxlen)
{
	struct scpi_serial *sscpi = priv;
	int ret;

	/* Try to read new data into the buffer. */
	ret = serial_read_nonblocking(sscpi->serial, buf, maxlen);
	if (ret < 0)
		return ret;

	/*
	 * Check for line termination at the end of the receive data.
	 * Handle the usual case of NL, as well as the unusual NL+CR
	 * combination (some GWInstek DMMs were found to do this).
	 */
	sscpi->got_newline = FALSE;
	if (ret >= 1 && buf[ret - 1] == '\n') {
		sscpi->got_newline = TRUE;
		sr_spew("Received NL terminator");
	} else if (ret >= 2 && buf[ret - 2] == '\n' && buf[ret - 1] == '\r') {
		ret--;
		sscpi->got_newline = TRUE;
		sr_spew("Received NL+CR terminator");
	}

	return ret;
}

static int scpi_serial_read_complete(void *priv)
{
	struct scpi_serial *sscpi = priv;

	return sscpi->got_newline;
}

static int scpi_serial_close(struct sr_scpi_dev_inst *scpi)
{
	struct scpi_serial *sscpi = scpi->priv;

	return serial_close(sscpi->serial);
}

static void scpi_serial_free(void *priv)
{
	struct scpi_serial *sscpi = priv;

	sr_serial_dev_inst_free(sscpi->serial);
}

SR_PRIV const struct sr_scpi_dev_inst scpi_serial_dev = {
	.name          = "serial",
	.prefix        = "",
	.transport     = SCPI_TRANSPORT_SERIAL,
	.priv_size     = sizeof(struct scpi_serial),
	.scan          = scpi_serial_scan,
	.dev_inst_new  = scpi_serial_dev_inst_new,
	.open          = scpi_serial_open,
	.connection_id = scpi_serial_connection_id,
	.source_add    = scpi_serial_source_add,
	.source_remove = scpi_serial_source_remove,
	.send          = scpi_serial_send,
	.read_begin    = scpi_serial_read_begin,
	.read_data     = scpi_serial_read_data,
	.read_complete = scpi_serial_read_complete,
	.close         = scpi_serial_close,
	.free          = scpi_serial_free,
};

#endif
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
	5	* Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <config.h>
	22	#include <glib.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <libsigrok/libsigrok.h>
	26	#include "libsigrok-internal.h"
	27	#include "scpi.h"
	28
	29	#define LOG_PREFIX "scpi_serial"
	30
	31	#ifdef HAVE_SERIAL_COMM
	32
	33	struct scpi_serial {
	34	struct sr_serial_dev_inst *serial;
	35	gboolean got_newline;
	36	};
	37
	38	/* Default serial port options for some known USB devices */
	39	static const struct {
	40	uint16_t vendor_id;
	41	uint16_t product_id;
	42	const char *serialcomm;
	43	} scpi_serial_usb_ids[] = {
	44	{ 0x0403, 0xed72, "115200/8n1/flow=1" }, /* Hameg HO720 */
	45	{ 0x0403, 0xed73, "115200/8n1/flow=1" }, /* Hameg HO730 */
	46	{ 0x0aad, 0x0117, "115200/8n1" }, /* R&S HMO series, previously branded as Hameg HMO */
	47	{ 0x0aad, 0x0118, "115200/8n1" }, /* R&S HMO series, previously branded as Hameg HMO */
	48	{ 0x0aad, 0x0119, "115200/8n1" }, /* R&S HMO series, previously branded as Hameg HMO */
	49	{ 0x2184, 0x0030, "115200/8n1" }, /* GW-Instek GDM-8341 (VCP, SiLabs CP210x) */
	50	{ 0x2184, 0x0058, "115200/8n1" }, /* GW-Instek GDM-9061 (USBCDC mode) */
	51	};
	52
	53	static GSList scpi_serial_scan(struct drv_context drvc)
	54	{
	55	GSList l, r, *resources = NULL;
	56	gchar *res;
	57	unsigned i;
	58
	59	(void)drvc;
	60
	61	for (i = 0; i < ARRAY_SIZE(scpi_serial_usb_ids); i++) {
	62	if (!(l = sr_serial_find_usb(scpi_serial_usb_ids[i].vendor_id,
	63	scpi_serial_usb_ids[i].product_id)))
	64	continue;
	65	for (r = l; r; r = r->next) {
	66	if (scpi_serial_usb_ids[i].serialcomm)
	67	res = g_strdup_printf("%s:%s", (char *) r->data,
	68	scpi_serial_usb_ids[i].serialcomm);
	69	else
	70	res = g_strdup(r->data);
	71	resources = g_slist_append(resources, res);
	72	}
	73	g_slist_free_full(l, g_free);
	74	}
	75
	76	return resources;
	77	}
	78
	79	static int scpi_serial_dev_inst_new(void priv, struct drv_context drvc,
	80	const char resource, char params, const char serialcomm)
	81	{
	82	GSList l, r;
	83	unsigned i;
	84	struct scpi_serial *sscpi = priv;
	85
	86	(void)drvc;
	87	(void)params;
	88
	89	/* If no serial port option is specified on the command-line using the
	90	* "serialcomm" driver option, but the device is connected through USB
	91	* and it requires a known default serial port option, then used it in
	92	* order to avoid data corruption or even worse problems.
	93	*/
	94	if (!serialcomm) {
	95	for (i = 0; i < ARRAY_SIZE(scpi_serial_usb_ids); i++) {
	96	if (!(l = sr_serial_find_usb(scpi_serial_usb_ids[i].vendor_id,
	97	scpi_serial_usb_ids[i].product_id)))
	98	continue;
	99	for (r = l; r; r = r->next)
	100	if (!strcmp(resource, r->data) && scpi_serial_usb_ids[i].serialcomm)
	101	serialcomm = scpi_serial_usb_ids[i].serialcomm;
	102	g_slist_free_full(l, g_free);
	103	}
	104	}
	105
	106	sscpi->serial = sr_serial_dev_inst_new(resource, serialcomm);
	107
	108	return SR_OK;
	109	}
	110
	111	static int scpi_serial_open(struct sr_scpi_dev_inst *scpi)
	112	{
	113	struct scpi_serial *sscpi = scpi->priv;
	114	struct sr_serial_dev_inst *serial = sscpi->serial;
	115
	116	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	117	return SR_ERR;
	118
	119	sscpi->got_newline = FALSE;
	120
	121	return SR_OK;
	122	}
	123
	124	static int scpi_serial_connection_id(struct sr_scpi_dev_inst *scpi,
	125	char **connection_id)
	126	{
	127	struct scpi_serial *sscpi = scpi->priv;
	128	struct sr_serial_dev_inst *serial = sscpi->serial;
	129
	130	*connection_id = g_strdup(serial->port);
	131
	132	return SR_OK;
	133	}
	134
	135	static int scpi_serial_source_add(struct sr_session session, void priv,
	136	int events, int timeout, sr_receive_data_callback cb, void *cb_data)
	137	{
	138	struct scpi_serial *sscpi = priv;
	139	struct sr_serial_dev_inst *serial = sscpi->serial;
	140
	141	return serial_source_add(session, serial, events, timeout, cb, cb_data);
	142	}
	143
	144	static int scpi_serial_source_remove(struct sr_session session, void priv)
	145	{
	146	struct scpi_serial *sscpi = priv;
	147	struct sr_serial_dev_inst *serial = sscpi->serial;
	148
	149	return serial_source_remove(session, serial);
	150	}
	151
	152	static int scpi_serial_send(void priv, const char command)
	153	{
	154	int result;
	155	struct scpi_serial *sscpi = priv;
	156	struct sr_serial_dev_inst *serial = sscpi->serial;
	157
	158	result = serial_write_blocking(serial, command, strlen(command), 0);
	159	if (result < 0) {
	160	sr_err("Error while sending SCPI command '%s': %d.",
	161	command, result);
	162	return SR_ERR;
	163	}
	164
	165	sr_spew("Successfully sent SCPI command: '%s'.", command);
	166
	167	return SR_OK;
	168	}
	169
	170	static int scpi_serial_read_begin(void *priv)
	171	{
	172	struct scpi_serial *sscpi = priv;
	173	sscpi->got_newline = FALSE;
	174
	175	return SR_OK;
	176	}
	177
	178	static int scpi_serial_read_data(void priv, char buf, int maxlen)
	179	{
	180	struct scpi_serial *sscpi = priv;
	181	int ret;
	182
	183	/* Try to read new data into the buffer. */
	184	ret = serial_read_nonblocking(sscpi->serial, buf, maxlen);
	185	if (ret < 0)
	186	return ret;
	187
	188	/*
	189	* Check for line termination at the end of the receive data.
	190	* Handle the usual case of NL, as well as the unusual NL+CR
	191	* combination (some GWInstek DMMs were found to do this).
	192	*/
	193	sscpi->got_newline = FALSE;
	194	if (ret >= 1 && buf[ret - 1] == '\n') {
	195	sscpi->got_newline = TRUE;
	196	sr_spew("Received NL terminator");
	197	} else if (ret >= 2 && buf[ret - 2] == '\n' && buf[ret - 1] == '\r') {
	198	ret--;
	199	sscpi->got_newline = TRUE;
	200	sr_spew("Received NL+CR terminator");
	201	}
	202
	203	return ret;
	204	}
	205
	206	static int scpi_serial_read_complete(void *priv)
	207	{
	208	struct scpi_serial *sscpi = priv;
	209
	210	return sscpi->got_newline;
	211	}
	212
	213	static int scpi_serial_close(struct sr_scpi_dev_inst *scpi)
	214	{
	215	struct scpi_serial *sscpi = scpi->priv;
	216
	217	return serial_close(sscpi->serial);
	218	}
	219
	220	static void scpi_serial_free(void *priv)
	221	{
	222	struct scpi_serial *sscpi = priv;
	223
	224	sr_serial_dev_inst_free(sscpi->serial);
	225	}
	226
	227	SR_PRIV const struct sr_scpi_dev_inst scpi_serial_dev = {
	228	.name = "serial",
	229	.prefix = "",
	230	.transport = SCPI_TRANSPORT_SERIAL,
	231	.priv_size = sizeof(struct scpi_serial),
	232	.scan = scpi_serial_scan,
	233	.dev_inst_new = scpi_serial_dev_inst_new,
	234	.open = scpi_serial_open,
	235	.connection_id = scpi_serial_connection_id,
	236	.source_add = scpi_serial_source_add,
	237	.source_remove = scpi_serial_source_remove,
	238	.send = scpi_serial_send,
	239	.read_begin = scpi_serial_read_begin,
	240	.read_data = scpi_serial_read_data,
	241	.read_complete = scpi_serial_read_complete,
	242	.close = scpi_serial_close,
	243	.free = scpi_serial_free,
	244	};
	245
	246	#endif