[libsigrok.git] / hardware / serial-dmm / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
 * Copyright (C) 2012 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 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"

static const int32_t hwopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

static const int32_t hwcaps[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_LIMIT_SAMPLES,
	SR_CONF_LIMIT_MSEC,
	SR_CONF_CONTINUOUS,
};

SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
SR_PRIV struct sr_dev_driver metex_me31_driver_info;
SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
SR_PRIV struct sr_dev_driver va_va18b_driver_info;
SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
SR_PRIV struct sr_dev_driver tecpel_dmm_8060_ser_driver_info;
SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;

SR_PRIV struct dmm_info dmms[] = {
	{
		"Digitek", "DT4000ZC", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_10_temp_c,
		&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
	},
	{
		"TekPower", "TP4000ZC", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_10_temp_c,
		&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
	},
	{
		"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&metex_me31_driver_info, receive_data_METEX_ME31,
	},
	{
		"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
	},
	{
		"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
	},
	{
		"V&A", "VA18B", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_01_temp_c,
		&va_va18b_driver_info, receive_data_VA_VA18B,
	},
	{
		"Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&metex_m3640d_driver_info, receive_data_METEX_M3640D,
	},
	{
		"PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
	},
	{
		"PCE", "PCE-DM32", "2400/8n1", 2400,
		FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_01_10_temp_f_c,
		&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
	},
	{
		"RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
	},
	{
		"RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
	},
	{
		"RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
		RS9LCD_PACKET_SIZE, NULL,
		sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
		NULL,
		&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
	},
	{
		"Tecpel", "DMM-8060 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
		2400, FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		NULL,
		&tecpel_dmm_8060_ser_driver_info,
		receive_data_TECPEL_DMM_8060_SER,
	},
	{
		"Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
		2400, FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_00_temp_c,
		&tecpel_dmm_8061_ser_driver_info,
		receive_data_TECPEL_DMM_8061_SER,
	},
	{
		"Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1", 1200,
		METEX14_PACKET_SIZE, sr_metex14_packet_request,
		sr_metex14_packet_valid, sr_metex14_parse,
		NULL,
		&voltcraft_m3650d_driver_info, receive_data_VOLTCRAFT_M3650D,
	},
	{
		"Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
		2400, FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		NULL,
		&voltcraft_vc820_ser_driver_info,
		receive_data_VOLTCRAFT_VC820_SER,
	},
	{
		"Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
		2400, FS9721_PACKET_SIZE, NULL,
		sr_fs9721_packet_valid, sr_fs9721_parse,
		sr_fs9721_00_temp_c,
		&voltcraft_vc840_ser_driver_info,
		receive_data_VOLTCRAFT_VC840_SER,
	},
	{
		"UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
		2400, FS9922_PACKET_SIZE, NULL,
		sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
		&uni_t_ut61d_ser_driver_info, receive_data_UNI_T_UT61D_SER,
	},
	{
		/* Note: ES51922 baudrate is actually 19230! */
		"UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
		19200, ES51922_PACKET_SIZE, NULL,
		sr_es51922_packet_valid, sr_es51922_parse, NULL,
		&uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
	},
};

static int dev_clear(int dmm)
{
	return std_dev_clear(dmms[dmm].di, NULL);
}

static int init(struct sr_context *sr_ctx, int dmm)
{
	sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);

	return std_init(sr_ctx, dmms[dmm].di, LOG_PREFIX);
}

static GSList *sdmm_scan(const char *conn, const char *serialcomm, int dmm)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_probe *probe;
	struct sr_serial_dev_inst *serial;
	GSList *devices;
	int dropped, ret;
	size_t len;
	uint8_t buf[128];

	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
		return NULL;

	if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
		return NULL;

	sr_info("Probing serial port %s.", conn);

	drvc = dmms[dmm].di->priv;
	devices = NULL;
	serial_flush(serial);

	/* Request a packet if the DMM requires this. */
	if (dmms[dmm].packet_request) {
		if ((ret = dmms[dmm].packet_request(serial)) < 0) {
			sr_err("Failed to request packet: %d.", ret);
			return FALSE;
		}
	}

	/*
	 * There's no way to get an ID from the multimeter. It just sends data
	 * periodically (or upon request), so the best we can do is check if
	 * the packets match the expected format.
	 */

	/* Let's get a bit of data and see if we can find a packet. */
	len = sizeof(buf);
	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
				   dmms[dmm].packet_valid, 1000,
				   dmms[dmm].baudrate);
	if (ret != SR_OK)
		goto scan_cleanup;

	/*
	 * If we dropped more than two packets worth of data, something is
	 * wrong. We shouldn't quit however, since the dropped bytes might be
	 * just zeroes at the beginning of the stream. Those can occur as a
	 * combination of the nonstandard cable that ships with some devices
	 * and the serial port or USB to serial adapter.
	 */
	dropped = len - dmms[dmm].packet_size;
	if (dropped > 2 * dmms[dmm].packet_size)
		sr_warn("Had to drop too much data.");

	sr_info("Found device on port %s.", conn);

	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
				    dmms[dmm].device, "")))
		goto scan_cleanup;

	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
		sr_err("Device context malloc failed.");
		goto scan_cleanup;
	}

	sdi->inst_type = SR_INST_SERIAL;
	sdi->conn = serial;

	sdi->priv = devc;
	sdi->driver = dmms[dmm].di;
	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
		goto scan_cleanup;
	sdi->probes = g_slist_append(sdi->probes, probe);
	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

scan_cleanup:
	serial_close(serial);

	return devices;
}

static GSList *scan(GSList *options, int dmm)
{
	struct sr_config *src;
	GSList *l, *devices;
	const char *conn, *serialcomm;

	conn = serialcomm = 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;
		case SR_CONF_SERIALCOMM:
			serialcomm = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	if (!conn)
		return NULL;

	if (serialcomm) {
		/* Use the provided comm specs. */
		devices = sdmm_scan(conn, serialcomm, dmm);
	} else {
		/* Try the default. */
		devices = sdmm_scan(conn, dmms[dmm].conn, dmm);
	}

	return devices;
}

static GSList *dev_list(int dmm)
{
	return ((struct drv_context *)(dmms[dmm].di->priv))->instances;
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_serial_dev_inst *serial;

	serial = sdi->conn;
	if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
		return SR_ERR;

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_serial_dev_inst *serial;

	serial = sdi->conn;
	if (serial && serial->fd != -1) {
		serial_close(serial);
		sdi->status = SR_ST_INACTIVE;
	}

	return SR_OK;
}

static int cleanup(int dmm)
{
	return dev_clear(dmm);
}

static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	switch (id) {
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		sr_dbg("Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	case SR_CONF_LIMIT_MSEC:
		devc->limit_msec = g_variant_get_uint64(data);
		sr_dbg("Setting time limit to %" PRIu64 "ms.",
		       devc->limit_msec);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

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

	(void)sdi;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi,
				    void *cb_data, int dmm)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	devc->cb_data = cb_data;

	/*
	 * Reset the number of samples to take. If we've already collected our
	 * quota, but we start a new session, and don't reset this, we'll just
	 * quit without acquiring any new samples.
	 */
	devc->num_samples = 0;
	devc->starttime = g_get_monotonic_time();

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

	/* Poll every 50ms, or whenever some data comes in. */
	serial = sdi->conn;
	sr_source_add(serial->fd, G_IO_IN, 50,
		      dmms[dmm].receive_data, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	return std_dev_acquisition_stop_serial(sdi, cb_data, dev_close,
					       sdi->conn, LOG_PREFIX);
}

/* Driver-specific API function wrappers */
#define HW_INIT(X) \
static int init_##X(struct sr_context *sr_ctx) { return init(sr_ctx, X); }
#define HW_CLEANUP(X) \
static int cleanup_##X(void) { return cleanup(X); }
#define HW_SCAN(X) \
static GSList *scan_##X(GSList *options) { return scan(options, X); }
#define HW_DEV_LIST(X) \
static GSList *dev_list_##X(void) { return dev_list(X); }
#define HW_DEV_CLEAR(X) \
static int dev_clear_##X(void) { return dev_clear(X); }
#define HW_DEV_ACQUISITION_START(X) \
static int dev_acquisition_start_##X(const struct sr_dev_inst *sdi, \
void *cb_data) { return dev_acquisition_start(sdi, cb_data, X); }

/* Driver structs and API function wrappers */
#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
HW_INIT(ID_UPPER) \
HW_CLEANUP(ID_UPPER) \
HW_SCAN(ID_UPPER) \
HW_DEV_LIST(ID_UPPER) \
HW_DEV_CLEAR(ID_UPPER) \
HW_DEV_ACQUISITION_START(ID_UPPER) \
SR_PRIV struct sr_dev_driver ID##_driver_info = { \
	.name = NAME, \
	.longname = LONGNAME, \
	.api_version = 1, \
	.init = init_##ID_UPPER, \
	.cleanup = cleanup_##ID_UPPER, \
	.scan = scan_##ID_UPPER, \
	.dev_list = dev_list_##ID_UPPER, \
	.dev_clear = dev_clear_##ID_UPPER, \
	.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_##ID_UPPER, \
	.dev_acquisition_stop = dev_acquisition_stop, \
	.priv = NULL, \
};

DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
DRV(radioshack_22_805, RADIOSHACK_22_805, "radioshack-22-805", "RadioShack 22-805")
DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
DRV(tecpel_dmm_8060_ser, TECPEL_DMM_8060_SER, "tecpel-dmm-8060-ser", "Tecpel DMM-8060 (UT-D02 cable)")
DRV(tecpel_dmm_8061_ser, TECPEL_DMM_8061_SER, "tecpel-dmm-8061-ser", "Tecpel DMM-8061 (UT-D02 cable)")
DRV(voltcraft_m3650d, VOLTCRAFT_M3650D, "voltcraft-m3650d", "Voltcraft M-3650D")
DRV(voltcraft_vc820_ser, VOLTCRAFT_VC820_SER, "voltcraft-vc820-ser", "Voltcraft VC-820 (UT-D02 cable)")
DRV(voltcraft_vc840_ser, VOLTCRAFT_VC840_SER, "voltcraft-vc840-ser", "Voltcraft VC-840 (UT-D02 cable)")
DRV(uni_t_ut61d_ser, UNI_T_UT61D_SER, "uni-t-ut61d-ser", "UNI-T UT61D (UT-D02 cable)")
DRV(uni_t_ut61e_ser, UNI_T_UT61E_SER, "uni-t-ut61e-ser", "UNI-T UT61E (UT-D02 cable)")
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	5	* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
	6	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
	7	*
	8	* This program is free software: you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation, either version 3 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
	22	#include <sys/types.h>
	23	#include <sys/stat.h>
	24	#include <fcntl.h>
	25	#include <string.h>
	26	#include <errno.h>
	27	#include <glib.h>
	28	#include "libsigrok.h"
	29	#include "libsigrok-internal.h"
	30	#include "protocol.h"
	31
	32	static const int32_t hwopts[] = {
	33	SR_CONF_CONN,
	34	SR_CONF_SERIALCOMM,
	35	};
	36
	37	static const int32_t hwcaps[] = {
	38	SR_CONF_MULTIMETER,
	39	SR_CONF_LIMIT_SAMPLES,
	40	SR_CONF_LIMIT_MSEC,
	41	SR_CONF_CONTINUOUS,
	42	};
	43
	44	SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
	45	SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
	46	SR_PRIV struct sr_dev_driver metex_me31_driver_info;
	47	SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
	48	SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
	49	SR_PRIV struct sr_dev_driver va_va18b_driver_info;
	50	SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
	51	SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
	52	SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
	53	SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
	54	SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
	55	SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
	56	SR_PRIV struct sr_dev_driver tecpel_dmm_8060_ser_driver_info;
	57	SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
	58	SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
	59	SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
	60	SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
	61	SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
	62	SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
	63
	64	SR_PRIV struct dmm_info dmms[] = {
	65	{
	66	"Digitek", "DT4000ZC", "2400/8n1", 2400,
	67	FS9721_PACKET_SIZE, NULL,
	68	sr_fs9721_packet_valid, sr_fs9721_parse,
	69	sr_fs9721_10_temp_c,
	70	&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
	71	},
	72	{
	73	"TekPower", "TP4000ZC", "2400/8n1", 2400,
	74	FS9721_PACKET_SIZE, NULL,
	75	sr_fs9721_packet_valid, sr_fs9721_parse,
	76	sr_fs9721_10_temp_c,
	77	&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
	78	},
	79	{
	80	"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
	81	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	82	sr_metex14_packet_valid, sr_metex14_parse,
	83	NULL,
	84	&metex_me31_driver_info, receive_data_METEX_ME31,
	85	},
	86	{
	87	"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
	88	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	89	sr_metex14_packet_valid, sr_metex14_parse,
	90	NULL,
	91	&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
	92	},
	93	{
	94	"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
	95	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	96	sr_metex14_packet_valid, sr_metex14_parse,
	97	NULL,
	98	&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
	99	},
	100	{
	101	"V&A", "VA18B", "2400/8n1", 2400,
	102	FS9721_PACKET_SIZE, NULL,
	103	sr_fs9721_packet_valid, sr_fs9721_parse,
	104	sr_fs9721_01_temp_c,
	105	&va_va18b_driver_info, receive_data_VA_VA18B,
	106	},
	107	{
	108	"Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
	109	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	110	sr_metex14_packet_valid, sr_metex14_parse,
	111	NULL,
	112	&metex_m3640d_driver_info, receive_data_METEX_M3640D,
	113	},
	114	{
	115	"PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
	116	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	117	sr_metex14_packet_valid, sr_metex14_parse,
	118	NULL,
	119	&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
	120	},
	121	{
	122	"PCE", "PCE-DM32", "2400/8n1", 2400,
	123	FS9721_PACKET_SIZE, NULL,
	124	sr_fs9721_packet_valid, sr_fs9721_parse,
	125	sr_fs9721_01_10_temp_f_c,
	126	&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
	127	},
	128	{
	129	"RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
	130	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	131	sr_metex14_packet_valid, sr_metex14_parse,
	132	NULL,
	133	&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
	134	},
	135	{
	136	"RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
	137	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	138	sr_metex14_packet_valid, sr_metex14_parse,
	139	NULL,
	140	&radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
	141	},
	142	{
	143	"RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
	144	RS9LCD_PACKET_SIZE, NULL,
	145	sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
	146	NULL,
	147	&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
	148	},
	149	{
	150	"Tecpel", "DMM-8060 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
	151	2400, FS9721_PACKET_SIZE, NULL,
	152	sr_fs9721_packet_valid, sr_fs9721_parse,
	153	NULL,
	154	&tecpel_dmm_8060_ser_driver_info,
	155	receive_data_TECPEL_DMM_8060_SER,
	156	},
	157	{
	158	"Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
	159	2400, FS9721_PACKET_SIZE, NULL,
	160	sr_fs9721_packet_valid, sr_fs9721_parse,
	161	sr_fs9721_00_temp_c,
	162	&tecpel_dmm_8061_ser_driver_info,
	163	receive_data_TECPEL_DMM_8061_SER,
	164	},
	165	{
	166	"Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1", 1200,
	167	METEX14_PACKET_SIZE, sr_metex14_packet_request,
	168	sr_metex14_packet_valid, sr_metex14_parse,
	169	NULL,
	170	&voltcraft_m3650d_driver_info, receive_data_VOLTCRAFT_M3650D,
	171	},
	172	{
	173	"Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
	174	2400, FS9721_PACKET_SIZE, NULL,
	175	sr_fs9721_packet_valid, sr_fs9721_parse,
	176	NULL,
	177	&voltcraft_vc820_ser_driver_info,
	178	receive_data_VOLTCRAFT_VC820_SER,
	179	},
	180	{
	181	"Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
	182	2400, FS9721_PACKET_SIZE, NULL,
	183	sr_fs9721_packet_valid, sr_fs9721_parse,
	184	sr_fs9721_00_temp_c,
	185	&voltcraft_vc840_ser_driver_info,
	186	receive_data_VOLTCRAFT_VC840_SER,
	187	},
	188	{
	189	"UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
	190	2400, FS9922_PACKET_SIZE, NULL,
	191	sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
	192	&uni_t_ut61d_ser_driver_info, receive_data_UNI_T_UT61D_SER,
	193	},
	194	{
	195	/* Note: ES51922 baudrate is actually 19230! */
	196	"UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
	197	19200, ES51922_PACKET_SIZE, NULL,
	198	sr_es51922_packet_valid, sr_es51922_parse, NULL,
	199	&uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
	200	},
	201	};
	202
	203	static int dev_clear(int dmm)
	204	{
	205	return std_dev_clear(dmms[dmm].di, NULL);
	206	}
	207
	208	static int init(struct sr_context *sr_ctx, int dmm)
	209	{
	210	sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);
	211
	212	return std_init(sr_ctx, dmms[dmm].di, LOG_PREFIX);
	213	}
	214
	215	static GSList sdmm_scan(const char conn, const char *serialcomm, int dmm)
	216	{
	217	struct sr_dev_inst *sdi;
	218	struct drv_context *drvc;
	219	struct dev_context *devc;
	220	struct sr_probe *probe;
	221	struct sr_serial_dev_inst *serial;
	222	GSList *devices;
	223	int dropped, ret;
	224	size_t len;
	225	uint8_t buf[128];
	226
	227	if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
	228	return NULL;
	229
	230	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	231	return NULL;
	232
	233	sr_info("Probing serial port %s.", conn);
	234
	235	drvc = dmms[dmm].di->priv;
	236	devices = NULL;
	237	serial_flush(serial);
	238
	239	/* Request a packet if the DMM requires this. */
	240	if (dmms[dmm].packet_request) {
	241	if ((ret = dmms[dmm].packet_request(serial)) < 0) {
	242	sr_err("Failed to request packet: %d.", ret);
	243	return FALSE;
	244	}
	245	}
	246
	247	/*
	248	* There's no way to get an ID from the multimeter. It just sends data
	249	* periodically (or upon request), so the best we can do is check if
	250	* the packets match the expected format.
	251	*/
	252
	253	/* Let's get a bit of data and see if we can find a packet. */
	254	len = sizeof(buf);
	255	ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
	256	dmms[dmm].packet_valid, 1000,
	257	dmms[dmm].baudrate);
	258	if (ret != SR_OK)
	259	goto scan_cleanup;
	260
	261	/*
	262	* If we dropped more than two packets worth of data, something is
	263	* wrong. We shouldn't quit however, since the dropped bytes might be
	264	* just zeroes at the beginning of the stream. Those can occur as a
	265	* combination of the nonstandard cable that ships with some devices
	266	* and the serial port or USB to serial adapter.
	267	*/
	268	dropped = len - dmms[dmm].packet_size;
	269	if (dropped > 2 * dmms[dmm].packet_size)
	270	sr_warn("Had to drop too much data.");
	271
	272	sr_info("Found device on port %s.", conn);
	273
	274	if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
	275	dmms[dmm].device, "")))
	276	goto scan_cleanup;
	277
	278	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
	279	sr_err("Device context malloc failed.");
	280	goto scan_cleanup;
	281	}
	282
	283	sdi->inst_type = SR_INST_SERIAL;
	284	sdi->conn = serial;
	285
	286	sdi->priv = devc;
	287	sdi->driver = dmms[dmm].di;
	288	if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
	289	goto scan_cleanup;
	290	sdi->probes = g_slist_append(sdi->probes, probe);
	291	drvc->instances = g_slist_append(drvc->instances, sdi);
	292	devices = g_slist_append(devices, sdi);
	293
	294	scan_cleanup:
	295	serial_close(serial);
	296
	297	return devices;
	298	}
	299
	300	static GSList scan(GSList options, int dmm)
	301	{
	302	struct sr_config *src;
	303	GSList l, devices;
	304	const char conn, serialcomm;
	305
	306	conn = serialcomm = NULL;
	307	for (l = options; l; l = l->next) {
	308	src = l->data;
	309	switch (src->key) {
	310	case SR_CONF_CONN:
	311	conn = g_variant_get_string(src->data, NULL);
	312	break;
	313	case SR_CONF_SERIALCOMM:
	314	serialcomm = g_variant_get_string(src->data, NULL);
	315	break;
	316	}
	317	}
	318	if (!conn)
	319	return NULL;
	320
	321	if (serialcomm) {
	322	/* Use the provided comm specs. */
	323	devices = sdmm_scan(conn, serialcomm, dmm);
	324	} else {
	325	/* Try the default. */
	326	devices = sdmm_scan(conn, dmms[dmm].conn, dmm);
	327	}
	328
	329	return devices;
	330	}
	331
	332	static GSList *dev_list(int dmm)
	333	{
	334	return ((struct drv_context *)(dmms[dmm].di->priv))->instances;
	335	}
	336
	337	static int dev_open(struct sr_dev_inst *sdi)
	338	{
	339	struct sr_serial_dev_inst *serial;
	340
	341	serial = sdi->conn;
	342	if (serial_open(serial, SERIAL_RDWR \| SERIAL_NONBLOCK) != SR_OK)
	343	return SR_ERR;
	344
	345	sdi->status = SR_ST_ACTIVE;
	346
	347	return SR_OK;
	348	}
	349
	350	static int dev_close(struct sr_dev_inst *sdi)
	351	{
	352	struct sr_serial_dev_inst *serial;
	353
	354	serial = sdi->conn;
	355	if (serial && serial->fd != -1) {
	356	serial_close(serial);
	357	sdi->status = SR_ST_INACTIVE;
	358	}
	359
	360	return SR_OK;
	361	}
	362
	363	static int cleanup(int dmm)
	364	{
	365	return dev_clear(dmm);
	366	}
	367
	368	static int config_set(int id, GVariant data, const struct sr_dev_inst sdi)
	369	{
	370	struct dev_context *devc;
	371
	372	if (sdi->status != SR_ST_ACTIVE)
	373	return SR_ERR_DEV_CLOSED;
	374
	375	if (!(devc = sdi->priv)) {
	376	sr_err("sdi->priv was NULL.");
	377	return SR_ERR_BUG;
	378	}
	379
	380	switch (id) {
	381	case SR_CONF_LIMIT_SAMPLES:
	382	devc->limit_samples = g_variant_get_uint64(data);
	383	sr_dbg("Setting sample limit to %" PRIu64 ".",
	384	devc->limit_samples);
	385	break;
	386	case SR_CONF_LIMIT_MSEC:
	387	devc->limit_msec = g_variant_get_uint64(data);
	388	sr_dbg("Setting time limit to %" PRIu64 "ms.",
	389	devc->limit_msec);
	390	break;
	391	default:
	392	return SR_ERR_NA;
	393	}
	394
	395	return SR_OK;
	396	}
	397
	398	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi)
	399	{
	400
	401	(void)sdi;
	402
	403	switch (key) {
	404	case SR_CONF_SCAN_OPTIONS:
	405	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	406	hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
	407	break;
	408	case SR_CONF_DEVICE_OPTIONS:
	409	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	410	hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
	411	break;
	412	default:
	413	return SR_ERR_NA;
	414	}
	415
	416	return SR_OK;
	417	}
	418
	419	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
	420	void *cb_data, int dmm)
	421	{
	422	struct dev_context *devc;
	423	struct sr_serial_dev_inst *serial;
	424
	425	if (sdi->status != SR_ST_ACTIVE)
	426	return SR_ERR_DEV_CLOSED;
	427
	428	if (!(devc = sdi->priv)) {
	429	sr_err("sdi->priv was NULL.");
	430	return SR_ERR_BUG;
	431	}
	432
	433	devc->cb_data = cb_data;
	434
	435	/*
	436	* Reset the number of samples to take. If we've already collected our
	437	* quota, but we start a new session, and don't reset this, we'll just
	438	* quit without acquiring any new samples.
	439	*/
	440	devc->num_samples = 0;
	441	devc->starttime = g_get_monotonic_time();
	442
	443	/* Send header packet to the session bus. */
	444	std_session_send_df_header(cb_data, LOG_PREFIX);
	445
	446	/* Poll every 50ms, or whenever some data comes in. */
	447	serial = sdi->conn;
	448	sr_source_add(serial->fd, G_IO_IN, 50,
	449	dmms[dmm].receive_data, (void *)sdi);
	450
	451	return SR_OK;
	452	}
	453
	454	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	455	{
	456	return std_dev_acquisition_stop_serial(sdi, cb_data, dev_close,
	457	sdi->conn, LOG_PREFIX);
	458	}
	459
	460	/* Driver-specific API function wrappers */
	461	#define HW_INIT(X) \
	462	static int init_##X(struct sr_context *sr_ctx) { return init(sr_ctx, X); }
	463	#define HW_CLEANUP(X) \
	464	static int cleanup_##X(void) { return cleanup(X); }
	465	#define HW_SCAN(X) \
	466	static GSList scan_##X(GSList options) { return scan(options, X); }
	467	#define HW_DEV_LIST(X) \
	468	static GSList *dev_list_##X(void) { return dev_list(X); }
	469	#define HW_DEV_CLEAR(X) \
	470	static int dev_clear_##X(void) { return dev_clear(X); }
	471	#define HW_DEV_ACQUISITION_START(X) \
	472	static int dev_acquisition_start_##X(const struct sr_dev_inst *sdi, \
	473	void *cb_data) { return dev_acquisition_start(sdi, cb_data, X); }
	474
	475	/* Driver structs and API function wrappers */
	476	#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
	477	HW_INIT(ID_UPPER) \
	478	HW_CLEANUP(ID_UPPER) \
	479	HW_SCAN(ID_UPPER) \
	480	HW_DEV_LIST(ID_UPPER) \
	481	HW_DEV_CLEAR(ID_UPPER) \
	482	HW_DEV_ACQUISITION_START(ID_UPPER) \
	483	SR_PRIV struct sr_dev_driver ID##_driver_info = { \
	484	.name = NAME, \
	485	.longname = LONGNAME, \
	486	.api_version = 1, \
	487	.init = init_##ID_UPPER, \
	488	.cleanup = cleanup_##ID_UPPER, \
	489	.scan = scan_##ID_UPPER, \
	490	.dev_list = dev_list_##ID_UPPER, \
	491	.dev_clear = dev_clear_##ID_UPPER, \
	492	.config_get = NULL, \
	493	.config_set = config_set, \
	494	.config_list = config_list, \
	495	.dev_open = dev_open, \
	496	.dev_close = dev_close, \
	497	.dev_acquisition_start = dev_acquisition_start_##ID_UPPER, \
	498	.dev_acquisition_stop = dev_acquisition_stop, \
	499	.priv = NULL, \
	500	};
	501
	502	DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
	503	DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
	504	DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
	505	DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
	506	DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
	507	DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
	508	DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
	509	DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
	510	DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
	511	DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
	512	DRV(radioshack_22_805, RADIOSHACK_22_805, "radioshack-22-805", "RadioShack 22-805")
	513	DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
	514	DRV(tecpel_dmm_8060_ser, TECPEL_DMM_8060_SER, "tecpel-dmm-8060-ser", "Tecpel DMM-8060 (UT-D02 cable)")
	515	DRV(tecpel_dmm_8061_ser, TECPEL_DMM_8061_SER, "tecpel-dmm-8061-ser", "Tecpel DMM-8061 (UT-D02 cable)")
	516	DRV(voltcraft_m3650d, VOLTCRAFT_M3650D, "voltcraft-m3650d", "Voltcraft M-3650D")
	517	DRV(voltcraft_vc820_ser, VOLTCRAFT_VC820_SER, "voltcraft-vc820-ser", "Voltcraft VC-820 (UT-D02 cable)")
	518	DRV(voltcraft_vc840_ser, VOLTCRAFT_VC840_SER, "voltcraft-vc840-ser", "Voltcraft VC-840 (UT-D02 cable)")
	519	DRV(uni_t_ut61d_ser, UNI_T_UT61D_SER, "uni-t-ut61d-ser", "UNI-T UT61D (UT-D02 cable)")
	520	DRV(uni_t_ut61e_ser, UNI_T_UT61E_SER, "uni-t-ut61e-ser", "UNI-T UT61E (UT-D02 cable)")