[libsigrok.git] / src / hardware / uni-t-dmm / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012-2013 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 2 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 <stdlib.h>
#include <string.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#include "protocol.h"

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
};

static const uint32_t devopts[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_GET,
	SR_CONF_LIMIT_MSEC | SR_CONF_SET | SR_CONF_GET,
};

/*
 * Note 1: The actual baudrate of the Cyrustek ES519xx chip used in this DMM
 * is 19230. However, the WCH CH9325 chip (UART to USB/HID) used in (some
 * versions of) the UNI-T UT-D04 cable doesn't support 19230 baud. It only
 * supports 19200, and setting an unsupported baudrate will result in the
 * default of 2400 being used (which will not work with this DMM, of course).
 */

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	GSList *usb_devices, *devices, *l;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct drv_context *drvc;
	struct dmm_info *dmm;
	struct sr_usb_dev_inst *usb;
	struct sr_config *src;
	const char *conn;

	drvc = di->context;
	dmm = (struct dmm_info *)di;

	conn = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		switch (src->key) {
		case SR_CONF_CONN:
			conn = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	if (!conn)
		return NULL;

	devices = NULL;
	if (!(usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
		g_slist_free_full(usb_devices, g_free);
		return NULL;
	}

	for (l = usb_devices; l; l = l->next) {
		usb = l->data;
		devc = g_malloc0(sizeof(struct dev_context));
		devc->first_run = TRUE;
		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup(dmm->vendor);
		sdi->model = g_strdup(dmm->device);
		sdi->priv = devc;
		sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
		sdi->inst_type = SR_INST_USB;
		sdi->conn = usb;
		devices = g_slist_append(devices, sdi);
	}

	return std_scan_complete(di, devices);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di;
	struct drv_context *drvc;
	struct sr_usb_dev_inst *usb;

	di = sdi->driver;
	drvc = di->context;
	usb = sdi->conn;

	return sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
}

static int dev_close(struct sr_dev_inst *sdi)
{
	(void)sdi;

	/* TODO */

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	devc = sdi->priv;

	return sr_sw_limits_config_set(&devc->limits, key, data);
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

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

	devc = sdi->priv;

	sr_sw_limits_acquisition_start(&devc->limits);

	std_session_send_df_header(sdi);

	sr_session_source_add(sdi->session, -1, 0, 10 /* poll_timeout */,
			uni_t_dmm_receive_data, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	std_session_send_df_end(sdi);
	sr_session_source_remove(sdi->session, -1);

	return SR_OK;
}

#define DMM(ID, CHIPSET, VENDOR, MODEL, BAUDRATE, PACKETSIZE, \
			VALID, PARSE, DETAILS) \
	&((struct dmm_info) { \
		{ \
			.name = ID, \
			.longname = VENDOR " " MODEL, \
			.api_version = 1, \
			.init = std_init, \
			.cleanup = std_cleanup, \
			.scan = scan, \
			.dev_list = std_dev_list, \
			.config_get = NULL, \
			.config_set = config_set, \
			.config_list = config_list, \
			.dev_open = dev_open, \
			.dev_close = dev_close, \
			.dev_acquisition_start = dev_acquisition_start, \
			.dev_acquisition_stop = dev_acquisition_stop, \
			.context = NULL, \
		}, \
		VENDOR, MODEL, BAUDRATE, PACKETSIZE, \
		VALID, PARSE, DETAILS, sizeof(struct CHIPSET##_info) \
	}).di

SR_REGISTER_DEV_DRIVER_LIST(uni_t_dmm_drivers,
	DMM(
		"tecpel-dmm-8061", fs9721,
		"Tecpel", "DMM-8061", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_00_temp_c
	),
	DMM(
		"uni-t-ut372", ut372,
		"UNI-T", "UT372", 2400,
		UT372_PACKET_SIZE,
		sr_ut372_packet_valid, sr_ut372_parse,
		NULL
	),
	DMM(
		"uni-t-ut60a", fs9721,
		"UNI-T", "UT60A", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		NULL
	),
	DMM(
		"uni-t-ut60e", fs9721,
		"UNI-T", "UT60E", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_00_temp_c
	),
	DMM(
		"uni-t-ut60g", es519xx,
		/* The baudrate is actually 19230, see "Note 1" below. */
		"UNI-T", "UT60G", 19200,
		ES519XX_11B_PACKET_SIZE,
		sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
		NULL
	),
	DMM(
		"uni-t-ut61b", fs9922,
		"UNI-T", "UT61B", 2400,
		FS9922_PACKET_SIZE,
		sr_fs9922_packet_valid, sr_fs9922_parse,
		NULL
	),
	DMM(
		"uni-t-ut61c", fs9922,
		"UNI-T", "UT61C", 2400,
		FS9922_PACKET_SIZE,
		sr_fs9922_packet_valid, sr_fs9922_parse,
		NULL
	),
	DMM(
		"uni-t-ut61d", fs9922,
		"UNI-T", "UT61D", 2400,
		FS9922_PACKET_SIZE,
		sr_fs9922_packet_valid, sr_fs9922_parse,
		NULL
	),
	DMM(
		"uni-t-ut61e", es519xx,
		/* The baudrate is actually 19230, see "Note 1" below. */
		"UNI-T", "UT61E", 19200,
		ES519XX_14B_PACKET_SIZE,
		sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
		NULL
	),
	DMM(
		"uni-t-ut71a", ut71x,
		"UNI-T", "UT71A", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"uni-t-ut71b", ut71x,
		"UNI-T", "UT71B", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"uni-t-ut71c", ut71x,
		"UNI-T", "UT71C", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"uni-t-ut71d", ut71x,
		"UNI-T", "UT71D", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"uni-t-ut71e", ut71x,
		"UNI-T", "UT71E", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"voltcraft-vc820", fs9721,
		"Voltcraft", "VC-820", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		NULL
	),
	DMM(
		"voltcraft-vc830", fs9922,
		/*
		 * Note: The VC830 doesn't set the 'volt' and 'diode' bits of
		 * the FS9922 protocol. Instead, it only sets the user-defined
		 * bit "z1" to indicate "diode mode" and "voltage".
		 */
		"Voltcraft", "VC-830", 2400,
		FS9922_PACKET_SIZE,
		sr_fs9922_packet_valid, sr_fs9922_parse,
		&sr_fs9922_z1_diode
	),
	DMM(
		"voltcraft-vc840", fs9721,
		"Voltcraft", "VC-840", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_00_temp_c
	),
	DMM(
		"voltcraft-vc870", vc870,
		"Voltcraft", "VC-870", 9600, VC870_PACKET_SIZE,
		sr_vc870_packet_valid, sr_vc870_parse, NULL
	),
	DMM(
		"voltcraft-vc920", ut71x,
		"Voltcraft", "VC-920", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"voltcraft-vc940", ut71x,
		"Voltcraft", "VC-940", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"voltcraft-vc960", ut71x,
		"Voltcraft", "VC-960", 2400, UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"tenma-72-7730", ut71x,
		"Tenma", "72-7730", 2400,
		UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"tenma-72-7732", ut71x,
		"Tenma", "72-7732", 2400,
		UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"tenma-72-9380a", ut71x,
		"Tenma", "72-9380A", 2400,
		UT71X_PACKET_SIZE,
		sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	),
	DMM(
		"tenma-72-7745", fs9721,
		"Tenma", "72-7745", 2400,
		FS9721_PACKET_SIZE,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_00_temp_c
	),
	DMM(
		"tenma-72-7750", es519xx,
		/* The baudrate is actually 19230, see "Note 1" below. */
		"Tenma", "72-7750", 19200,
		ES519XX_11B_PACKET_SIZE,
		sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
		NULL
	),
);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2012-2013 Uwe Hermann <uwe@hermann-uwe.de>
	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 2 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 <config.h>
	21	#include <stdlib.h>
	22	#include <string.h>
	23	#include <libsigrok/libsigrok.h>
	24	#include "libsigrok-internal.h"
	25	#include "protocol.h"
	26
	27	static const uint32_t scanopts[] = {
	28	SR_CONF_CONN,
	29	};
	30
	31	static const uint32_t devopts[] = {
	32	SR_CONF_MULTIMETER,
	33	SR_CONF_CONTINUOUS,
	34	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET \| SR_CONF_GET,
	35	SR_CONF_LIMIT_MSEC \| SR_CONF_SET \| SR_CONF_GET,
	36	};
	37
	38	/*
	39	* Note 1: The actual baudrate of the Cyrustek ES519xx chip used in this DMM
	40	* is 19230. However, the WCH CH9325 chip (UART to USB/HID) used in (some
	41	* versions of) the UNI-T UT-D04 cable doesn't support 19230 baud. It only
	42	* supports 19200, and setting an unsupported baudrate will result in the
	43	* default of 2400 being used (which will not work with this DMM, of course).
	44	*/
	45
	46	static GSList scan(struct sr_dev_driver di, GSList *options)
	47	{
	48	GSList usb_devices, devices, *l;
	49	struct sr_dev_inst *sdi;
	50	struct dev_context *devc;
	51	struct drv_context *drvc;
	52	struct dmm_info *dmm;
	53	struct sr_usb_dev_inst *usb;
	54	struct sr_config *src;
	55	const char *conn;
	56
	57	drvc = di->context;
	58	dmm = (struct dmm_info *)di;
	59
	60	conn = NULL;
	61	for (l = options; l; l = l->next) {
	62	src = l->data;
	63	switch (src->key) {
	64	case SR_CONF_CONN:
	65	conn = g_variant_get_string(src->data, NULL);
	66	break;
	67	}
	68	}
	69	if (!conn)
	70	return NULL;
	71
	72	devices = NULL;
	73	if (!(usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
	74	g_slist_free_full(usb_devices, g_free);
	75	return NULL;
	76	}
	77
	78	for (l = usb_devices; l; l = l->next) {
	79	usb = l->data;
	80	devc = g_malloc0(sizeof(struct dev_context));
	81	devc->first_run = TRUE;
	82	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	83	sdi->status = SR_ST_INACTIVE;
	84	sdi->vendor = g_strdup(dmm->vendor);
	85	sdi->model = g_strdup(dmm->device);
	86	sdi->priv = devc;
	87	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
	88	sdi->inst_type = SR_INST_USB;
	89	sdi->conn = usb;
	90	devices = g_slist_append(devices, sdi);
	91	}
	92
	93	return std_scan_complete(di, devices);
	94	}
	95
	96	static int dev_open(struct sr_dev_inst *sdi)
	97	{
	98	struct sr_dev_driver *di;
	99	struct drv_context *drvc;
	100	struct sr_usb_dev_inst *usb;
	101
	102	di = sdi->driver;
	103	drvc = di->context;
	104	usb = sdi->conn;
	105
	106	return sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	107	}
	108
	109	static int dev_close(struct sr_dev_inst *sdi)
	110	{
	111	(void)sdi;
	112
	113	/* TODO */
	114
	115	return SR_OK;
	116	}
	117
	118	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	119	const struct sr_channel_group *cg)
	120	{
	121	struct dev_context *devc;
	122
	123	(void)cg;
	124
	125	devc = sdi->priv;
	126
	127	return sr_sw_limits_config_set(&devc->limits, key, data);
	128	}
	129
	130	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	131	const struct sr_channel_group *cg)
	132	{
	133	(void)sdi;
	134	(void)cg;
	135
	136	switch (key) {
	137	case SR_CONF_SCAN_OPTIONS:
	138	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	139	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	140	break;
	141	case SR_CONF_DEVICE_OPTIONS:
	142	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	143	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	144	break;
	145	default:
	146	return SR_ERR_NA;
	147	}
	148
	149	return SR_OK;
	150	}
	151
	152	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	153	{
	154	struct dev_context *devc;
	155
	156	devc = sdi->priv;
	157
	158	sr_sw_limits_acquisition_start(&devc->limits);
	159
	160	std_session_send_df_header(sdi);
	161
	162	sr_session_source_add(sdi->session, -1, 0, 10 /* poll_timeout */,
	163	uni_t_dmm_receive_data, (void *)sdi);
	164
	165	return SR_OK;
	166	}
	167
	168	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	169	{
	170	std_session_send_df_end(sdi);
	171	sr_session_source_remove(sdi->session, -1);
	172
	173	return SR_OK;
	174	}
	175
	176	#define DMM(ID, CHIPSET, VENDOR, MODEL, BAUDRATE, PACKETSIZE, \
	177	VALID, PARSE, DETAILS) \
	178	&((struct dmm_info) { \
	179	{ \
	180	.name = ID, \
	181	.longname = VENDOR " " MODEL, \
	182	.api_version = 1, \
	183	.init = std_init, \
	184	.cleanup = std_cleanup, \
	185	.scan = scan, \
	186	.dev_list = std_dev_list, \
	187	.config_get = NULL, \
	188	.config_set = config_set, \
	189	.config_list = config_list, \
	190	.dev_open = dev_open, \
	191	.dev_close = dev_close, \
	192	.dev_acquisition_start = dev_acquisition_start, \
	193	.dev_acquisition_stop = dev_acquisition_stop, \
	194	.context = NULL, \
	195	}, \
	196	VENDOR, MODEL, BAUDRATE, PACKETSIZE, \
	197	VALID, PARSE, DETAILS, sizeof(struct CHIPSET##_info) \
	198	}).di
	199
	200	SR_REGISTER_DEV_DRIVER_LIST(uni_t_dmm_drivers,
	201	DMM(
	202	"tecpel-dmm-8061", fs9721,
	203	"Tecpel", "DMM-8061", 2400,
	204	FS9721_PACKET_SIZE,
	205	sr_fs9721_packet_valid, sr_fs9721_parse,
	206	sr_fs9721_00_temp_c
	207	),
	208	DMM(
	209	"uni-t-ut372", ut372,
	210	"UNI-T", "UT372", 2400,
	211	UT372_PACKET_SIZE,
	212	sr_ut372_packet_valid, sr_ut372_parse,
	213	NULL
	214	),
	215	DMM(
	216	"uni-t-ut60a", fs9721,
	217	"UNI-T", "UT60A", 2400,
	218	FS9721_PACKET_SIZE,
	219	sr_fs9721_packet_valid, sr_fs9721_parse,
	220	NULL
	221	),
	222	DMM(
	223	"uni-t-ut60e", fs9721,
	224	"UNI-T", "UT60E", 2400,
	225	FS9721_PACKET_SIZE,
	226	sr_fs9721_packet_valid, sr_fs9721_parse,
	227	sr_fs9721_00_temp_c
	228	),
	229	DMM(
	230	"uni-t-ut60g", es519xx,
	231	/* The baudrate is actually 19230, see "Note 1" below. */
	232	"UNI-T", "UT60G", 19200,
	233	ES519XX_11B_PACKET_SIZE,
	234	sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
	235	NULL
	236	),
	237	DMM(
	238	"uni-t-ut61b", fs9922,
	239	"UNI-T", "UT61B", 2400,
	240	FS9922_PACKET_SIZE,
	241	sr_fs9922_packet_valid, sr_fs9922_parse,
	242	NULL
	243	),
	244	DMM(
	245	"uni-t-ut61c", fs9922,
	246	"UNI-T", "UT61C", 2400,
	247	FS9922_PACKET_SIZE,
	248	sr_fs9922_packet_valid, sr_fs9922_parse,
	249	NULL
	250	),
	251	DMM(
	252	"uni-t-ut61d", fs9922,
	253	"UNI-T", "UT61D", 2400,
	254	FS9922_PACKET_SIZE,
	255	sr_fs9922_packet_valid, sr_fs9922_parse,
	256	NULL
	257	),
	258	DMM(
	259	"uni-t-ut61e", es519xx,
	260	/* The baudrate is actually 19230, see "Note 1" below. */
	261	"UNI-T", "UT61E", 19200,
	262	ES519XX_14B_PACKET_SIZE,
	263	sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
	264	NULL
	265	),
	266	DMM(
	267	"uni-t-ut71a", ut71x,
	268	"UNI-T", "UT71A", 2400, UT71X_PACKET_SIZE,
	269	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	270	),
	271	DMM(
	272	"uni-t-ut71b", ut71x,
	273	"UNI-T", "UT71B", 2400, UT71X_PACKET_SIZE,
	274	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	275	),
	276	DMM(
	277	"uni-t-ut71c", ut71x,
	278	"UNI-T", "UT71C", 2400, UT71X_PACKET_SIZE,
	279	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	280	),
	281	DMM(
	282	"uni-t-ut71d", ut71x,
	283	"UNI-T", "UT71D", 2400, UT71X_PACKET_SIZE,
	284	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	285	),
	286	DMM(
	287	"uni-t-ut71e", ut71x,
	288	"UNI-T", "UT71E", 2400, UT71X_PACKET_SIZE,
	289	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	290	),
	291	DMM(
	292	"voltcraft-vc820", fs9721,
	293	"Voltcraft", "VC-820", 2400,
	294	FS9721_PACKET_SIZE,
	295	sr_fs9721_packet_valid, sr_fs9721_parse,
	296	NULL
	297	),
	298	DMM(
	299	"voltcraft-vc830", fs9922,
	300	/*
	301	* Note: The VC830 doesn't set the 'volt' and 'diode' bits of
	302	* the FS9922 protocol. Instead, it only sets the user-defined
	303	* bit "z1" to indicate "diode mode" and "voltage".
	304	*/
	305	"Voltcraft", "VC-830", 2400,
	306	FS9922_PACKET_SIZE,
	307	sr_fs9922_packet_valid, sr_fs9922_parse,
	308	&sr_fs9922_z1_diode
	309	),
	310	DMM(
	311	"voltcraft-vc840", fs9721,
	312	"Voltcraft", "VC-840", 2400,
	313	FS9721_PACKET_SIZE,
	314	sr_fs9721_packet_valid, sr_fs9721_parse,
	315	sr_fs9721_00_temp_c
	316	),
	317	DMM(
	318	"voltcraft-vc870", vc870,
	319	"Voltcraft", "VC-870", 9600, VC870_PACKET_SIZE,
	320	sr_vc870_packet_valid, sr_vc870_parse, NULL
	321	),
	322	DMM(
	323	"voltcraft-vc920", ut71x,
	324	"Voltcraft", "VC-920", 2400, UT71X_PACKET_SIZE,
	325	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	326	),
	327	DMM(
	328	"voltcraft-vc940", ut71x,
	329	"Voltcraft", "VC-940", 2400, UT71X_PACKET_SIZE,
	330	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	331	),
	332	DMM(
	333	"voltcraft-vc960", ut71x,
	334	"Voltcraft", "VC-960", 2400, UT71X_PACKET_SIZE,
	335	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	336	),
	337	DMM(
	338	"tenma-72-7730", ut71x,
	339	"Tenma", "72-7730", 2400,
	340	UT71X_PACKET_SIZE,
	341	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	342	),
	343	DMM(
	344	"tenma-72-7732", ut71x,
	345	"Tenma", "72-7732", 2400,
	346	UT71X_PACKET_SIZE,
	347	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	348	),
	349	DMM(
	350	"tenma-72-9380a", ut71x,
	351	"Tenma", "72-9380A", 2400,
	352	UT71X_PACKET_SIZE,
	353	sr_ut71x_packet_valid, sr_ut71x_parse, NULL
	354	),
	355	DMM(
	356	"tenma-72-7745", fs9721,
	357	"Tenma", "72-7745", 2400,
	358	FS9721_PACKET_SIZE,
	359	sr_fs9721_packet_valid, sr_fs9721_parse,
	360	sr_fs9721_00_temp_c
	361	),
	362	DMM(
	363	"tenma-72-7750", es519xx,
	364	/* The baudrate is actually 19230, see "Note 1" below. */
	365	"Tenma", "72-7750", 19200,
	366	ES519XX_11B_PACKET_SIZE,
	367	sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
	368	NULL
	369	),
	370	);