[libsigrok.git] / hardware / rigol-ds1xx2 / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012 Martin Ling <martin-git@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 <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"

static const int hwcaps[] = {
	SR_CONF_OSCILLOSCOPE,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_TIMEBASE,
	SR_CONF_TRIGGER_SOURCE,
	SR_CONF_TRIGGER_SLOPE,
	SR_CONF_HORIZ_TRIGGERPOS,
	SR_CONF_VDIV,
	SR_CONF_COUPLING,
	0,
};

static const struct sr_rational timebases[] = {
	/* nanoseconds */
	{ 2, 1000000000 },
	{ 5, 1000000000 },
	{ 10, 1000000000 },
	{ 20, 1000000000 },
	{ 50, 1000000000 },
	{ 100, 1000000000 },
	{ 500, 1000000000 },
	/* microseconds */
	{ 1, 1000000 },
	{ 2, 1000000 },
	{ 5, 1000000 },
	{ 10, 1000000 },
	{ 20, 1000000 },
	{ 50, 1000000 },
	{ 100, 1000000 },
	{ 200, 1000000 },
	{ 500, 1000000 },
	/* milliseconds */
	{ 1, 1000 },
	{ 2, 1000 },
	{ 5, 1000 },
	{ 10, 1000 },
	{ 20, 1000 },
	{ 50, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 500, 1000 },
	/* seconds */
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
	{ 10, 1 },
	{ 20, 1 },
	{ 50, 1 },
	{ 0, 0},
};

static const struct sr_rational vdivs[] = {
	/* millivolts */
	{ 2, 1000 },
	{ 5, 1000 },
	{ 10, 1000 },
	{ 20, 1000 },
	{ 50, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 500, 1000 },
	/* volts */
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
	{ 10, 1 },
	{ 0, 0 },
};

static const char *trigger_sources[] = {
	"CH1",
	"CH2",
	"EXT",
	"AC Line",
	NULL,
};

static const char *coupling[] = {
	"AC",
	"DC",
	"GND",
	NULL,
};

static const char *supported_models[] = {
	"DS1052E",
	"DS1102E",
	"DS1052D",
	"DS1102D",
};

SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;

/* Properly close and free all devices. */
static int clear_instances(void)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *l;

	if (!(drvc = di->priv))
		return SR_OK;

	for (l = drvc->instances; l; l = l->next) {
		if (!(sdi = l->data))
			continue;
		if (!(devc = sdi->priv))
			continue;

		g_free(devc->device);
		g_slist_free(devc->enabled_probes);
		close(devc->fd);

		sr_dev_inst_free(sdi);
	}

	g_slist_free(drvc->instances);
	drvc->instances = NULL;

	return SR_OK;
}

static int hw_init(struct sr_context *sr_ctx)
{
	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
}

static GSList *hw_scan(GSList *options)
{
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_probe *probe;
	GSList *devices;
	GDir *dir;
	const gchar *dev_name;
	const gchar *dev_dir = "/dev/";
	const gchar *prefix = "usbtmc";
	gchar *device;
	const gchar *idn_query = "*IDN?";
	int len, num_tokens, fd, i;
	const gchar *delimiter = ",";
	gchar **tokens;
	const char *manufacturer, *model, *version;
	gboolean matched = FALSE;
	char buf[256];

	(void)options;

	drvc = di->priv;
	drvc->instances = NULL;

	devices = NULL;

	dir = g_dir_open("/sys/class/usb/", 0, NULL);

	if (dir == NULL)
		return NULL;

	while ((dev_name = g_dir_read_name(dir)) != NULL) {
		if (strncmp(dev_name, prefix, strlen(prefix))) 
			continue;

		device = g_strconcat(dev_dir, dev_name, NULL);

		fd = open(device, O_RDWR);
		len = write(fd, idn_query, strlen(idn_query));
		len = read(fd, buf, sizeof(buf));
		close(fd);
		if (len == 0) {
			g_free(device);
			return NULL;
		}

		buf[len] = 0;
		tokens = g_strsplit(buf, delimiter, 0);
		close(fd);
		sr_dbg("response: %s %d [%s]", device, len, buf);

		for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);

		if (num_tokens < 4) {
			g_strfreev(tokens);
			g_free(device);
			return NULL;
		}

		manufacturer = tokens[0];
		model = tokens[1];
		version = tokens[3];

		if (strcmp(manufacturer, "Rigol Technologies")) {
			g_strfreev(tokens);
			g_free(device);
			return NULL;
		}

		for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
			if (!strcmp(model, supported_models[i])) {
				matched = 1;
				break;
			}
		}

		if (!matched || !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
			manufacturer, model, version))) {
			g_strfreev(tokens);
			g_free(device);
			return NULL;
		}

		g_strfreev(tokens);

		if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
			sr_err("Device context malloc failed.");
			g_free(device);
			return NULL;
		}

		devc->device = device;

		sdi->priv = devc;
		sdi->driver = di;

		for (i = 0; i < 2; i++) {
			if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
			    i == 0 ? "CH1" : "CH2")))
				return NULL;
			sdi->probes = g_slist_append(sdi->probes, probe);
		}

		drvc->instances = g_slist_append(drvc->instances, sdi);
		devices = g_slist_append(devices, sdi);
	}

	g_dir_close(dir);

	return devices;
}

static GSList *hw_dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static int hw_dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	int fd;

	devc = sdi->priv;

	if ((fd = open(devc->device, O_RDWR)) == -1)
		return SR_ERR;

	devc->fd = fd;

	devc->scale = 1;

	return SR_OK;
}

static int hw_dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

	close(devc->fd);

	return SR_OK;
}

static int hw_cleanup(void)
{
	clear_instances();

	return SR_OK;
}

static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	uint64_t tmp_u64;
	float tmp_float;
	struct sr_rational tmp_rat;
	int ret, i, j;
	char *channel;

	devc = sdi->priv;

	if (sdi->status != SR_ST_ACTIVE) {
		sr_err("Device inactive, can't set config options.");
		return SR_ERR;
	}

	ret = SR_OK;
	switch (id) {
	case SR_CONF_LIMIT_FRAMES:
		devc->limit_frames = *(const uint64_t *)value;
		break;
	case SR_CONF_TRIGGER_SLOPE:
		tmp_u64 = *(const int *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
				       tmp_u64 ? "POS" : "NEG");
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		tmp_float = *(const float *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
		break;
	case SR_CONF_TIMEBASE:
		tmp_rat = *(const struct sr_rational *)value;
		rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
				       (float)tmp_rat.p / tmp_rat.q);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		if (!strcmp(value, "CH1"))
			channel = "CHAN1";
		else if (!strcmp(value, "CH2"))
			channel = "CHAN2";
		else if (!strcmp(value, "EXT"))
			channel = "EXT";
		else if (!strcmp(value, "AC Line"))
			channel = "ACL";
		else {
			ret = SR_ERR_ARG;
			break;
		}
		rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
		break;
	case SR_CONF_VDIV:
		/* TODO: Not supporting vdiv per channel yet. */
		tmp_rat = *(const struct sr_rational *)value;
		for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
			if (vdivs[i].p == tmp_rat.p
					&& vdivs[i].q == tmp_rat.q) {
				devc->scale = (float)tmp_rat.p / tmp_rat.q;
				for (j = 0; j < 2; j++)
					rigol_ds1xx2_send_data(devc->fd,
					 ":CHAN%d:SCAL %.3f\n", j, devc->scale);
				break;
			}
		}
		if (vdivs[i].p == 0 && vdivs[i].q == 0)
			ret = SR_ERR_ARG;
		break;
	case SR_CONF_COUPLING:
		/* TODO: Not supporting coupling per channel yet. */
		for (i = 0; coupling[i]; i++) {
			if (!strcmp(value, coupling[i])) {
				for (j = 0; j < 2; j++)
					rigol_ds1xx2_send_data(devc->fd,
					  ":CHAN%d:COUP %s\n", j, coupling[i]);
				break;
			}
		}
		if (coupling[i] == 0)
			ret = SR_ERR_ARG;
		break;
	default:
		sr_err("Unknown hardware capability: %d.", id);
		ret = SR_ERR_ARG;
		break;
	}

	return ret;
}

static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
{

	(void)sdi;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = hwcaps;
		break;
	case SR_CONF_COUPLING:
		*data = coupling;
		break;
	case SR_CONF_VDIV:
		*data = vdivs;
		break;
	case SR_CONF_TIMEBASE:
		*data = timebases;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = trigger_sources;
		break;
	default:
		return SR_ERR_ARG;
	}

	return SR_OK;
}

static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
				    void *cb_data)
{
	struct dev_context *devc;
	char buf[256];
	int len;

	(void)cb_data;

	devc = sdi->priv;

	devc->num_frames = 0;

	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);

	/* Hardcoded to CH1 only. */
	devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
	len = read(devc->fd, buf, sizeof(buf));
	buf[len] = 0;
	devc->scale = atof(buf);
	sr_dbg("Scale is %.3f.", devc->scale);
	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
	len = read(devc->fd, buf, sizeof(buf));
	buf[len] = 0;
	devc->offset = atof(buf);
	sr_dbg("Offset is %.6f.", devc->offset);
	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");

	return SR_OK;
}

static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;

	(void)cb_data;

	devc = sdi->priv;

	if (sdi->status != SR_ST_ACTIVE) {
		sr_err("Device inactive, can't stop acquisition.");
		return SR_ERR;
	}

	sr_source_remove(devc->fd);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	.name = "rigol-ds1xx2",
	.longname = "Rigol DS1xx2",
	.api_version = 1,
	.init = hw_init,
	.cleanup = hw_cleanup,
	.scan = hw_scan,
	.dev_list = hw_dev_list,
	.dev_clear = clear_instances,
	.config_get = NULL,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.dev_acquisition_start = hw_dev_acquisition_start,
	.dev_acquisition_stop = hw_dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2012 Martin Ling <martin-git@earth.li>
	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
	20	#include <fcntl.h>
	21	#include <unistd.h>
	22	#include <stdlib.h>
	23	#include <string.h>
	24	#include <glib.h>
	25	#include "libsigrok.h"
	26	#include "libsigrok-internal.h"
	27	#include "protocol.h"
	28
	29	static const int hwcaps[] = {
	30	SR_CONF_OSCILLOSCOPE,
	31	SR_CONF_LIMIT_SAMPLES,
	32	SR_CONF_TIMEBASE,
	33	SR_CONF_TRIGGER_SOURCE,
	34	SR_CONF_TRIGGER_SLOPE,
	35	SR_CONF_HORIZ_TRIGGERPOS,
	36	SR_CONF_VDIV,
	37	SR_CONF_COUPLING,
	38	0,
	39	};
	40
	41	static const struct sr_rational timebases[] = {
	42	/* nanoseconds */
	43	{ 2, 1000000000 },
	44	{ 5, 1000000000 },
	45	{ 10, 1000000000 },
	46	{ 20, 1000000000 },
	47	{ 50, 1000000000 },
	48	{ 100, 1000000000 },
	49	{ 500, 1000000000 },
	50	/* microseconds */
	51	{ 1, 1000000 },
	52	{ 2, 1000000 },
	53	{ 5, 1000000 },
	54	{ 10, 1000000 },
	55	{ 20, 1000000 },
	56	{ 50, 1000000 },
	57	{ 100, 1000000 },
	58	{ 200, 1000000 },
	59	{ 500, 1000000 },
	60	/* milliseconds */
	61	{ 1, 1000 },
	62	{ 2, 1000 },
	63	{ 5, 1000 },
	64	{ 10, 1000 },
	65	{ 20, 1000 },
	66	{ 50, 1000 },
	67	{ 100, 1000 },
	68	{ 200, 1000 },
	69	{ 500, 1000 },
	70	/* seconds */
	71	{ 1, 1 },
	72	{ 2, 1 },
	73	{ 5, 1 },
	74	{ 10, 1 },
	75	{ 20, 1 },
	76	{ 50, 1 },
	77	{ 0, 0},
	78	};
	79
	80	static const struct sr_rational vdivs[] = {
	81	/* millivolts */
	82	{ 2, 1000 },
	83	{ 5, 1000 },
	84	{ 10, 1000 },
	85	{ 20, 1000 },
	86	{ 50, 1000 },
	87	{ 100, 1000 },
	88	{ 200, 1000 },
	89	{ 500, 1000 },
	90	/* volts */
	91	{ 1, 1 },
	92	{ 2, 1 },
	93	{ 5, 1 },
	94	{ 10, 1 },
	95	{ 0, 0 },
	96	};
	97
	98	static const char *trigger_sources[] = {
	99	"CH1",
	100	"CH2",
	101	"EXT",
	102	"AC Line",
	103	NULL,
	104	};
	105
	106	static const char *coupling[] = {
	107	"AC",
	108	"DC",
	109	"GND",
	110	NULL,
	111	};
	112
	113	static const char *supported_models[] = {
	114	"DS1052E",
	115	"DS1102E",
	116	"DS1052D",
	117	"DS1102D",
	118	};
	119
	120	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
	121	static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
	122
	123	/* Properly close and free all devices. */
	124	static int clear_instances(void)
	125	{
	126	struct sr_dev_inst *sdi;
	127	struct drv_context *drvc;
	128	struct dev_context *devc;
	129	GSList *l;
	130
	131	if (!(drvc = di->priv))
	132	return SR_OK;
	133
	134	for (l = drvc->instances; l; l = l->next) {
	135	if (!(sdi = l->data))
	136	continue;
	137	if (!(devc = sdi->priv))
	138	continue;
	139
	140	g_free(devc->device);
	141	g_slist_free(devc->enabled_probes);
	142	close(devc->fd);
	143
	144	sr_dev_inst_free(sdi);
	145	}
	146
	147	g_slist_free(drvc->instances);
	148	drvc->instances = NULL;
	149
	150	return SR_OK;
	151	}
	152
	153	static int hw_init(struct sr_context *sr_ctx)
	154	{
	155	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
	156	}
	157
	158	static GSList hw_scan(GSList options)
	159	{
	160	struct drv_context *drvc;
	161	struct sr_dev_inst *sdi;
	162	struct dev_context *devc;
	163	struct sr_probe *probe;
	164	GSList *devices;
	165	GDir *dir;
	166	const gchar *dev_name;
	167	const gchar *dev_dir = "/dev/";
	168	const gchar *prefix = "usbtmc";
	169	gchar *device;
	170	const gchar idn_query = "IDN?";
	171	int len, num_tokens, fd, i;
	172	const gchar *delimiter = ",";
	173	gchar **tokens;
	174	const char manufacturer, model, *version;
	175	gboolean matched = FALSE;
	176	char buf[256];
	177
	178	(void)options;
	179
	180	drvc = di->priv;
	181	drvc->instances = NULL;
	182
	183	devices = NULL;
	184
	185	dir = g_dir_open("/sys/class/usb/", 0, NULL);
	186
	187	if (dir == NULL)
	188	return NULL;
	189
	190	while ((dev_name = g_dir_read_name(dir)) != NULL) {
	191	if (strncmp(dev_name, prefix, strlen(prefix)))
	192	continue;
	193
	194	device = g_strconcat(dev_dir, dev_name, NULL);
	195
	196	fd = open(device, O_RDWR);
	197	len = write(fd, idn_query, strlen(idn_query));
	198	len = read(fd, buf, sizeof(buf));
	199	close(fd);
	200	if (len == 0) {
	201	g_free(device);
	202	return NULL;
	203	}
	204
	205	buf[len] = 0;
	206	tokens = g_strsplit(buf, delimiter, 0);
	207	close(fd);
	208	sr_dbg("response: %s %d [%s]", device, len, buf);
	209
	210	for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
	211
	212	if (num_tokens < 4) {
	213	g_strfreev(tokens);
	214	g_free(device);
	215	return NULL;
	216	}
	217
	218	manufacturer = tokens[0];
	219	model = tokens[1];
	220	version = tokens[3];
	221
	222	if (strcmp(manufacturer, "Rigol Technologies")) {
	223	g_strfreev(tokens);
	224	g_free(device);
	225	return NULL;
	226	}
	227
	228	for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
	229	if (!strcmp(model, supported_models[i])) {
	230	matched = 1;
	231	break;
	232	}
	233	}
	234
	235	if (!matched \|\| !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
	236	manufacturer, model, version))) {
	237	g_strfreev(tokens);
	238	g_free(device);
	239	return NULL;
	240	}
	241
	242	g_strfreev(tokens);
	243
	244	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	245	sr_err("Device context malloc failed.");
	246	g_free(device);
	247	return NULL;
	248	}
	249
	250	devc->device = device;
	251
	252	sdi->priv = devc;
	253	sdi->driver = di;
	254
	255	for (i = 0; i < 2; i++) {
	256	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
	257	i == 0 ? "CH1" : "CH2")))
	258	return NULL;
	259	sdi->probes = g_slist_append(sdi->probes, probe);
	260	}
	261
	262	drvc->instances = g_slist_append(drvc->instances, sdi);
	263	devices = g_slist_append(devices, sdi);
	264	}
	265
	266	g_dir_close(dir);
	267
	268	return devices;
	269	}
	270
	271	static GSList *hw_dev_list(void)
	272	{
	273	return ((struct drv_context *)(di->priv))->instances;
	274	}
	275
	276	static int hw_dev_open(struct sr_dev_inst *sdi)
	277	{
	278	struct dev_context *devc;
	279	int fd;
	280
	281	devc = sdi->priv;
	282
	283	if ((fd = open(devc->device, O_RDWR)) == -1)
	284	return SR_ERR;
	285
	286	devc->fd = fd;
	287
	288	devc->scale = 1;
	289
	290	return SR_OK;
	291	}
	292
	293	static int hw_dev_close(struct sr_dev_inst *sdi)
	294	{
	295	struct dev_context *devc;
	296
	297	devc = sdi->priv;
	298
	299	close(devc->fd);
	300
	301	return SR_OK;
	302	}
	303
	304	static int hw_cleanup(void)
	305	{
	306	clear_instances();
	307
	308	return SR_OK;
	309	}
	310
	311	static int config_set(int id, const void value, const struct sr_dev_inst sdi)
	312	{
	313	struct dev_context *devc;
	314	uint64_t tmp_u64;
	315	float tmp_float;
	316	struct sr_rational tmp_rat;
	317	int ret, i, j;
	318	char *channel;
	319
	320	devc = sdi->priv;
	321
	322	if (sdi->status != SR_ST_ACTIVE) {
	323	sr_err("Device inactive, can't set config options.");
	324	return SR_ERR;
	325	}
	326
	327	ret = SR_OK;
	328	switch (id) {
	329	case SR_CONF_LIMIT_FRAMES:
	330	devc->limit_frames = (const uint64_t )value;
	331	break;
	332	case SR_CONF_TRIGGER_SLOPE:
	333	tmp_u64 = (const int )value;
	334	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
	335	tmp_u64 ? "POS" : "NEG");
	336	break;
	337	case SR_CONF_HORIZ_TRIGGERPOS:
	338	tmp_float = (const float )value;
	339	rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float);
	340	break;
	341	case SR_CONF_TIMEBASE:
	342	tmp_rat = (const struct sr_rational )value;
	343	rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
	344	(float)tmp_rat.p / tmp_rat.q);
	345	break;
	346	case SR_CONF_TRIGGER_SOURCE:
	347	if (!strcmp(value, "CH1"))
	348	channel = "CHAN1";
	349	else if (!strcmp(value, "CH2"))
	350	channel = "CHAN2";
	351	else if (!strcmp(value, "EXT"))
	352	channel = "EXT";
	353	else if (!strcmp(value, "AC Line"))
	354	channel = "ACL";
	355	else {
	356	ret = SR_ERR_ARG;
	357	break;
	358	}
	359	rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
	360	break;
	361	case SR_CONF_VDIV:
	362	/* TODO: Not supporting vdiv per channel yet. */
	363	tmp_rat = (const struct sr_rational )value;
	364	for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
	365	if (vdivs[i].p == tmp_rat.p
	366	&& vdivs[i].q == tmp_rat.q) {
	367	devc->scale = (float)tmp_rat.p / tmp_rat.q;
	368	for (j = 0; j < 2; j++)
	369	rigol_ds1xx2_send_data(devc->fd,
	370	":CHAN%d:SCAL %.3f\n", j, devc->scale);
	371	break;
	372	}
	373	}
	374	if (vdivs[i].p == 0 && vdivs[i].q == 0)
	375	ret = SR_ERR_ARG;
	376	break;
	377	case SR_CONF_COUPLING:
	378	/* TODO: Not supporting coupling per channel yet. */
	379	for (i = 0; coupling[i]; i++) {
	380	if (!strcmp(value, coupling[i])) {
	381	for (j = 0; j < 2; j++)
	382	rigol_ds1xx2_send_data(devc->fd,
	383	":CHAN%d:COUP %s\n", j, coupling[i]);
	384	break;
	385	}
	386	}
	387	if (coupling[i] == 0)
	388	ret = SR_ERR_ARG;
	389	break;
	390	default:
	391	sr_err("Unknown hardware capability: %d.", id);
	392	ret = SR_ERR_ARG;
	393	break;
	394	}
	395
	396	return ret;
	397	}
	398
	399	static int config_list(int key, const void *data, const struct sr_dev_inst sdi)
	400	{
	401
	402	(void)sdi;
	403
	404	switch (key) {
	405	case SR_CONF_DEVICE_OPTIONS:
	406	*data = hwcaps;
	407	break;
	408	case SR_CONF_COUPLING:
	409	*data = coupling;
	410	break;
	411	case SR_CONF_VDIV:
	412	*data = vdivs;
	413	break;
	414	case SR_CONF_TIMEBASE:
	415	*data = timebases;
	416	break;
	417	case SR_CONF_TRIGGER_SOURCE:
	418	*data = trigger_sources;
	419	break;
	420	default:
	421	return SR_ERR_ARG;
	422	}
	423
	424	return SR_OK;
	425	}
	426
	427	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
	428	void *cb_data)
	429	{
	430	struct dev_context *devc;
	431	char buf[256];
	432	int len;
	433
	434	(void)cb_data;
	435
	436	devc = sdi->priv;
	437
	438	devc->num_frames = 0;
	439
	440	sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);
	441
	442	/* Send header packet to the session bus. */
	443	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
	444
	445	/* Hardcoded to CH1 only. */
	446	devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
	447	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
	448	len = read(devc->fd, buf, sizeof(buf));
	449	buf[len] = 0;
	450	devc->scale = atof(buf);
	451	sr_dbg("Scale is %.3f.", devc->scale);
	452	rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
	453	len = read(devc->fd, buf, sizeof(buf));
	454	buf[len] = 0;
	455	devc->offset = atof(buf);
	456	sr_dbg("Offset is %.6f.", devc->offset);
	457	rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");
	458
	459	return SR_OK;
	460	}
	461
	462	static int hw_dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	463	{
	464	struct dev_context *devc;
	465
	466	(void)cb_data;
	467
	468	devc = sdi->priv;
	469
	470	if (sdi->status != SR_ST_ACTIVE) {
	471	sr_err("Device inactive, can't stop acquisition.");
	472	return SR_ERR;
	473	}
	474
	475	sr_source_remove(devc->fd);
	476
	477	return SR_OK;
	478	}
	479
	480	SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
	481	.name = "rigol-ds1xx2",
	482	.longname = "Rigol DS1xx2",
	483	.api_version = 1,
	484	.init = hw_init,
	485	.cleanup = hw_cleanup,
	486	.scan = hw_scan,
	487	.dev_list = hw_dev_list,
	488	.dev_clear = clear_instances,
	489	.config_get = NULL,
	490	.config_set = config_set,
	491	.config_list = config_list,
	492	.dev_open = hw_dev_open,
	493	.dev_close = hw_dev_close,
	494	.dev_acquisition_start = hw_dev_acquisition_start,
	495	.dev_acquisition_stop = hw_dev_acquisition_stop,
	496	.priv = NULL,
	497	};