[libsigrok.git] / src / hardware / gmc-mh-1x-2x / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013, 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
 *
 * 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/>.
 */

/**
 * @file
 *
 * Gossen Metrawatt Metrahit 1x/2x drivers
 *
 * @internal
 */

#include <config.h>
#include <string.h>
#include "protocol.h"

/* Serial communication parameters for Metrahit 1x/2x with 'RS232' adaptor */
#define SERIALCOMM_1X_RS232 "8228/6n1/dtr=1/rts=1/flow=0" /* =8192, closer with divider */
#define SERIALCOMM_2X_RS232 "9600/6n1/dtr=1/rts=1/flow=0"
#define SERIALCOMM_2X "9600/8n1/dtr=1/rts=1/flow=0"
#define VENDOR_GMC "Gossen Metrawatt"

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

/** Hardware capabilities for Metrahit 1x/2x devices in send mode. */
static const uint32_t devopts_sm[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_THERMOMETER, /**< All GMC 1x/2x multimeters seem to support this */
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
};

/** Hardware capabilities for Metrahit 2x devices in bidirectional Mode. */
static const uint32_t devopts_bd[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_THERMOMETER, /**< All GMC 1x/2x multimeters seem to support this */
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET,
};

/* TODO:
 * - For the 29S SR_CONF_ENERGYMETER, too.
 * - SR_CONF_PATTERN_MODE for some 2x devices
 * - SR_CONF_DATALOG for 22M, 26M, 29S and storage adaptors.
 * Need to implement device-specific lists.
 */

/**
 * Read single byte from serial port.
 *
 * @retval -1 Timeout or error.
 * @retval other Byte.
 */
static int read_byte(struct sr_serial_dev_inst *serial, gint64 timeout)
{
	uint8_t result = 0;
	int rc = 0;

	for (;;) {
		rc = serial_read_nonblocking(serial, &result, 1);
		if (rc == 1) {
			sr_spew("read: 0x%02x/%d", result, result);
			return result;
		}
		if (g_get_monotonic_time() > timeout)
			return -1;
		g_usleep(2000);
	}
}

/**
 * Try to detect GMC 1x/2x multimeter model in send mode for max. 1 second.
 *
 * @param serial Configured, open serial port.
 *
 * @retval NULL Detection failed.
 * @retval other Model code.
 */
static enum model scan_model_sm(struct sr_serial_dev_inst *serial)
{
	int byte, bytecnt, cnt;
	enum model model;
	gint64 timeout_us;

	model = METRAHIT_NONE;
	timeout_us = g_get_monotonic_time() + (1 * 1000 * 1000);

	/*
	 * Try to find message consisting of device code and several
	 * (at least 4) data bytes.
	 */
	for (bytecnt = 0; bytecnt < 100; bytecnt++) {
		byte = read_byte(serial, timeout_us);
		if ((byte == -1) || (timeout_us < g_get_monotonic_time()))
			break;
		if ((byte & MSGID_MASK) == MSGID_INF) {
			if (!(model = gmc_decode_model_sm(byte & MSGC_MASK)))
				break;
			/* Now expect (at least) 4 data bytes. */
			for (cnt = 0; cnt < 4; cnt++) {
				byte = read_byte(serial, timeout_us);
				if ((byte == -1) ||
					((byte & MSGID_MASK) != MSGID_DATA))
				{
					model = METRAHIT_NONE;
					bytecnt = 100;
					break;
				}
			}
			break;
		}
	}

	return model;
}

/**
 * Scan for Metrahit 1x and Metrahit 2x in send mode using Gossen Metrawatt
 * 'RS232' interface.
 *
 * The older 1x models use 8192 baud and the newer 2x 9600 baud.
 * The DMM usually sends up to about 20 messages per second. However, depending
 * on configuration and measurement mode the intervals can be much larger and
 * then the detection might not work.
 */
static GSList *scan_1x_2x_rs232(struct sr_dev_driver *di, GSList *options)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_config *src;
	struct sr_serial_dev_inst *serial;
	GSList *l, *devices;
	const char *conn, *serialcomm;
	enum model model;
	gboolean serialcomm_given;

	devices = NULL;
	conn = serialcomm = NULL;
	serialcomm_given = FALSE;

	sr_spew("scan_1x_2x_rs232() called!");

	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);
			serialcomm_given = TRUE;
			break;
		}
	}
	if (!conn)
		return NULL;
	if (!serialcomm)
		serialcomm = SERIALCOMM_2X_RS232;

	serial = sr_serial_dev_inst_new(conn, serialcomm);

	if (serial_open(serial, SERIAL_RDWR) != SR_OK) {
		sr_serial_dev_inst_free(serial);
		return NULL;
	}

	serial_flush(serial);

	model = scan_model_sm(serial);

	/*
	 * If detection failed and no user-supplied parameters,
	 * try second baud rate.
	 */
	if ((model == METRAHIT_NONE) && !serialcomm_given) {
		serialcomm = SERIALCOMM_1X_RS232;
		g_free(serial->serialcomm);
		serial->serialcomm = g_strdup(serialcomm);
		if (serial_set_paramstr(serial, serialcomm) == SR_OK) {
			serial_flush(serial);
			model = scan_model_sm(serial);
		}
	}

	if (model != METRAHIT_NONE) {
		sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(model));
		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup(VENDOR_GMC);
		sdi->model = g_strdup(gmc_model_str(model));
		devc = g_malloc0(sizeof(struct dev_context));
		sr_sw_limits_init(&devc->limits);
		devc->model = model;
		devc->settings_ok = FALSE;
		sdi->conn = serial;
		sdi->priv = devc;
		sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
		devices = g_slist_append(devices, sdi);
	}

	return std_scan_complete(di, devices);
}

/**
 * Scan for Metrahit 2x in a bidirectional mode using Gossen Metrawatt
 * 'BD 232' interface.
 */
static GSList *scan_2x_bd232(struct sr_dev_driver *di, GSList *options)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_config *src;
	struct sr_serial_dev_inst *serial;
	GSList *l, *devices;
	const char *conn, *serialcomm;
	int cnt, byte;
	gint64 timeout_us;

	sdi = NULL;
	devc = NULL;
	conn = serialcomm = NULL;
	devices = NULL;

	sr_spew("scan_2x_bd232() called!");

	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)
		serialcomm = SERIALCOMM_2X;

	serial = sr_serial_dev_inst_new(conn, serialcomm);

	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
		goto exit_err;

	devc = g_malloc0(sizeof(struct dev_context));

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->vendor = g_strdup(VENDOR_GMC);
	sdi->priv = devc;

	/* Send message 03 "Query multimeter version and status" */
	sdi->conn = serial;
	if (req_stat14(sdi, TRUE) != SR_OK)
		goto exit_err;

	/* Wait for reply from device(s) for up to 2s. */
	timeout_us = g_get_monotonic_time() + (2 * 1000 * 1000);

	while (timeout_us > g_get_monotonic_time()) {
		/* Receive reply (14 bytes) */
		devc->buflen = 0;
		for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
			byte = read_byte(serial, timeout_us);
			if (byte != -1)
				devc->buf[devc->buflen++] = (byte & MASK_6BITS);
		}

		if (devc->buflen != GMC_REPLY_SIZE)
			continue;

		devc->addr = devc->buf[0];
		process_msg14(sdi);
		devc->buflen = 0;

		if (devc->model != METRAHIT_NONE) {
			sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(devc->model));
			sr_sw_limits_init(&devc->limits);
			sdi->model = g_strdup(gmc_model_str(devc->model));
			sdi->version = g_strdup_printf("Firmware %d.%d", devc->fw_ver_maj, devc->fw_ver_min);
			sdi->conn = serial;
			sdi->priv = devc;
			sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
			devices = g_slist_append(devices, sdi);
			devc = g_malloc0(sizeof(struct dev_context));
			sdi = g_malloc0(sizeof(struct sr_dev_inst));
			sdi->status = SR_ST_INACTIVE;
			sdi->vendor = g_strdup(VENDOR_GMC);
		}
	};

	/* Free last alloc if no device found */
	if (devc->model == METRAHIT_NONE) {
		g_free(devc);
		sr_dev_inst_free(sdi);
	}

	return std_scan_complete(di, devices);

exit_err:
	sr_info("scan_2x_bd232(): Error!");

	sr_serial_dev_inst_free(serial);
	g_free(devc);
	sr_dev_inst_free(sdi);

	return NULL;
}

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

	devc = sdi->priv;

	devc->model = METRAHIT_NONE;

	return std_serial_dev_close(sdi);
}

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

	(void)cg;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
	case SR_CONF_LIMIT_MSEC:
		return sr_sw_limits_config_get(&devc->limits, key, data);
	case SR_CONF_POWER_OFF:
		*data = g_variant_new_boolean(FALSE);
		break;
	default:
		return SR_ERR_NA;
	}

	return ret;
}

/** Implementation of config_list, auxiliary function for common parts. */
static int config_list_common(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;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

/** Implementation of config_list for Metrahit 1x/2x send mode */
static int config_list_sm(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
			  const struct sr_channel_group *cg)
{
	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts_sm, ARRAY_SIZE(devopts_sm), sizeof(uint32_t));
		break;
	default:
		return config_list_common(key, data, sdi, cg);
	}

	return SR_OK;
}

/** Implementation of config_list for Metrahit 2x bidirectional mode */
static int config_list_bd(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
			  const struct sr_channel_group *cg)
{
	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts_bd, ARRAY_SIZE(devopts_bd), sizeof(uint32_t));
		break;
	default:
		return config_list_common(key, data, sdi, cg);
	}

	return SR_OK;
}

static int dev_acquisition_start_1x_2x_rs232(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;

	devc = sdi->priv;
	devc->settings_ok = FALSE;
	devc->buflen = 0;

	sr_sw_limits_acquisition_start(&devc->limits);
	std_session_send_df_header(sdi);

	/* Poll every 40ms, or whenever some data comes in. */
	serial = sdi->conn;
	serial_source_add(sdi->session, serial, G_IO_IN, 40,
			gmc_mh_1x_2x_receive_data, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_start_2x_bd232(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;

	devc = sdi->priv;
	devc->settings_ok = FALSE;
	devc->buflen = 0;

	sr_sw_limits_acquisition_start(&devc->limits);
	std_session_send_df_header(sdi);

	/* Poll every 40ms, or whenever some data comes in. */
	serial = sdi->conn;
	serial_source_add(sdi->session, serial, G_IO_IN, 40,
			gmc_mh_2x_receive_data, (void *)sdi);

	/* Send start message */
	return req_meas14(sdi);
}

static struct sr_dev_driver gmc_mh_1x_2x_rs232_driver_info = {
	.name = "gmc-mh-1x-2x-rs232",
	.longname = "Gossen Metrawatt Metrahit 1x/2x, RS232 interface",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan_1x_2x_rs232,
	.dev_list = std_dev_list,
	.dev_clear = NULL,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list_sm,
	.dev_open = std_serial_dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start_1x_2x_rs232,
	.dev_acquisition_stop = std_serial_dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(gmc_mh_1x_2x_rs232_driver_info);

static struct sr_dev_driver gmc_mh_2x_bd232_driver_info = {
	.name = "gmc-mh-2x-bd232",
	.longname = "Gossen Metrawatt Metrahit 2x, BD232/SI232-II interface",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan_2x_bd232,
	.dev_list = std_dev_list,
	.dev_clear = NULL,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list_bd,
	.dev_open = std_serial_dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start_2x_bd232,
	.dev_acquisition_stop = std_serial_dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(gmc_mh_2x_bd232_driver_info);
Commit	Line	Data
7b4edcb6 MH	1	/*
	2	* This file is part of the libsigrok project.
	3	*
c90beca7	4	* Copyright (C) 2013, 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
7b4edcb6 MH	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
d9251a2c UH	20	/**
	21	* @file
	22	*
	23	* Gossen Metrawatt Metrahit 1x/2x drivers
	24	*
	25	* @internal
6392d599 MH	26	*/
6392d599 MH	27
6ec6c43b	28	#include <config.h>
f5792417	29	#include <string.h>
7b4edcb6 MH	30	#include "protocol.h"
7b4edcb6 MH	31
f5792417 MH	32	/* Serial communication parameters for Metrahit 1x/2x with 'RS232' adaptor */
	33	#define SERIALCOMM_1X_RS232 "8228/6n1/dtr=1/rts=1/flow=0" /* =8192, closer with divider */
	34	#define SERIALCOMM_2X_RS232 "9600/6n1/dtr=1/rts=1/flow=0"
6392d599	35	#define SERIALCOMM_2X "9600/8n1/dtr=1/rts=1/flow=0"
f5792417 MH	36	#define VENDOR_GMC "Gossen Metrawatt"
f5792417 MH	37
a0e0bb41	38	static const uint32_t scanopts[] = {
f5792417 MH	39	SR_CONF_CONN,
	40	SR_CONF_SERIALCOMM,
	41	};
	42
c90beca7	43	/** Hardware capabilities for Metrahit 1x/2x devices in send mode. */
f254bc4b	44	static const uint32_t devopts_sm[] = {
f5792417	45	SR_CONF_MULTIMETER,
d9251a2c	46	SR_CONF_THERMOMETER, /*< All GMC 1x/2x multimeters seem to support this /
f5792417	47	SR_CONF_CONTINUOUS,
5827f61b BV	48	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
5827f61b BV	49	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
f5792417 MH	50	};
f5792417 MH	51
c90beca7	52	/** Hardware capabilities for Metrahit 2x devices in bidirectional Mode. */
f254bc4b	53	static const uint32_t devopts_bd[] = {
c90beca7	54	SR_CONF_MULTIMETER,
d9251a2c	55	SR_CONF_THERMOMETER, /*< All GMC 1x/2x multimeters seem to support this /
c90beca7	56	SR_CONF_CONTINUOUS,
5827f61b BV	57	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	58	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	59	SR_CONF_POWER_OFF \| SR_CONF_GET \| SR_CONF_SET,
c90beca7 MH	60	};
c90beca7 MH	61
6392d599 MH	62	/* TODO:
	63	* - For the 29S SR_CONF_ENERGYMETER, too.
	64	* - SR_CONF_PATTERN_MODE for some 2x devices
	65	* - SR_CONF_DATALOG for 22M, 26M, 29S and storage adaptors.
	66	* Need to implement device-specific lists.
	67	*/
	68
fc348b77 UH	69	/**
	70	* Read single byte from serial port.
	71	*
	72	* @retval -1 Timeout or error.
	73	* @retval other Byte.
f5792417 MH	74	*/
f5792417 MH	75	static int read_byte(struct sr_serial_dev_inst *serial, gint64 timeout)
7b4edcb6	76	{
fc348b77	77	uint8_t result = 0;
f5792417 MH	78	int rc = 0;
	79
	80	for (;;) {
0714a010	81	rc = serial_read_nonblocking(serial, &result, 1);
f5792417 MH	82	if (rc == 1) {
	83	sr_spew("read: 0x%02x/%d", result, result);
	84	return result;
	85	}
	86	if (g_get_monotonic_time() > timeout)
	87	return -1;
	88	g_usleep(2000);
	89	}
	90	}
	91
fc348b77 UH	92	/**
fc348b77 UH	93	* Try to detect GMC 1x/2x multimeter model in send mode for max. 1 second.
f5792417	94	*
fc348b77 UH	95	* @param serial Configured, open serial port.
	96	*
	97	* @retval NULL Detection failed.
	98	* @retval other Model code.
f5792417 MH	99	*/
	100	static enum model scan_model_sm(struct sr_serial_dev_inst *serial)
	101	{
	102	int byte, bytecnt, cnt;
	103	enum model model;
	104	gint64 timeout_us;
	105
873e0c12	106	model = METRAHIT_NONE;
1a46cc62	107	timeout_us = g_get_monotonic_time() + (1 * 1000 * 1000);
f5792417	108
fc348b77 UH	109	/*
	110	* Try to find message consisting of device code and several
	111	* (at least 4) data bytes.
	112	*/
f5792417 MH	113	for (bytecnt = 0; bytecnt < 100; bytecnt++) {
	114	byte = read_byte(serial, timeout_us);
	115	if ((byte == -1) \|\| (timeout_us < g_get_monotonic_time()))
	116	break;
	117	if ((byte & MSGID_MASK) == MSGID_INF) {
873e0c12	118	if (!(model = gmc_decode_model_sm(byte & MSGC_MASK)))
f5792417	119	break;
fc348b77	120	/* Now expect (at least) 4 data bytes. */
f5792417 MH	121	for (cnt = 0; cnt < 4; cnt++) {
	122	byte = read_byte(serial, timeout_us);
	123	if ((byte == -1) \|\|
d9251a2c	124	((byte & MSGID_MASK) != MSGID_DATA))
f5792417	125	{
873e0c12	126	model = METRAHIT_NONE;
f5792417 MH	127	bytecnt = 100;
	128	break;
	129	}
	130	}
	131	break;
	132	}
	133	}
7b4edcb6	134
f5792417 MH	135	return model;
	136	}
	137
fc348b77 UH	138	/**
	139	* Scan for Metrahit 1x and Metrahit 2x in send mode using Gossen Metrawatt
	140	* 'RS232' interface.
	141	*
	142	* The older 1x models use 8192 baud and the newer 2x 9600 baud.
	143	* The DMM usually sends up to about 20 messages per second. However, depending
	144	* on configuration and measurement mode the intervals can be much larger and
	145	* then the detection might not work.
f5792417	146	*/
4f840ce9	147	static GSList scan_1x_2x_rs232(struct sr_dev_driver di, GSList *options)
f5792417 MH	148	{
f5792417 MH	149	struct sr_dev_inst *sdi;
f5792417 MH	150	struct dev_context *devc;
f5792417 MH	151	struct sr_config *src;
f5792417 MH	152	struct sr_serial_dev_inst *serial;
	153	GSList l, devices;
	154	const char conn, serialcomm;
	155	enum model model;
	156	gboolean serialcomm_given;
7b4edcb6 MH	157
7b4edcb6 MH	158	devices = NULL;
f5792417	159	conn = serialcomm = NULL;
f5792417 MH	160	serialcomm_given = FALSE;
f5792417 MH	161
c90beca7	162	sr_spew("scan_1x_2x_rs232() called!");
f5792417 MH	163
	164	for (l = options; l; l = l->next) {
	165	src = l->data;
	166	switch (src->key) {
	167	case SR_CONF_CONN:
	168	conn = g_variant_get_string(src->data, NULL);
	169	break;
	170	case SR_CONF_SERIALCOMM:
	171	serialcomm = g_variant_get_string(src->data, NULL);
	172	serialcomm_given = TRUE;
	173	break;
	174	}
	175	}
	176	if (!conn)
	177	return NULL;
	178	if (!serialcomm)
	179	serialcomm = SERIALCOMM_2X_RS232;
	180
91219afc	181	serial = sr_serial_dev_inst_new(conn, serialcomm);
f5792417	182
e13e354f	183	if (serial_open(serial, SERIAL_RDWR) != SR_OK) {
f5792417 MH	184	sr_serial_dev_inst_free(serial);
	185	return NULL;
	186	}
7b4edcb6	187
f5792417 MH	188	serial_flush(serial);
	189
	190	model = scan_model_sm(serial);
	191
fc348b77 UH	192	/*
	193	* If detection failed and no user-supplied parameters,
	194	* try second baud rate.
	195	*/
873e0c12	196	if ((model == METRAHIT_NONE) && !serialcomm_given) {
f5792417 MH	197	serialcomm = SERIALCOMM_1X_RS232;
	198	g_free(serial->serialcomm);
	199	serial->serialcomm = g_strdup(serialcomm);
	200	if (serial_set_paramstr(serial, serialcomm) == SR_OK) {
	201	serial_flush(serial);
	202	model = scan_model_sm(serial);
	203	}
	204	}
	205
873e0c12 UH	206	if (model != METRAHIT_NONE) {
873e0c12 UH	207	sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(model));
aac29cc1	208	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	209	sdi->status = SR_ST_INACTIVE;
	210	sdi->vendor = g_strdup(VENDOR_GMC);
	211	sdi->model = g_strdup(gmc_model_str(model));
f57d8ffe	212	devc = g_malloc0(sizeof(struct dev_context));
3c413879	213	sr_sw_limits_init(&devc->limits);
f5792417	214	devc->model = model;
f5792417	215	devc->settings_ok = FALSE;
f5792417 MH	216	sdi->conn = serial;
f5792417 MH	217	sdi->priv = devc;
5e23fcab	218	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
f5792417 MH	219	devices = g_slist_append(devices, sdi);
f5792417 MH	220	}
7b4edcb6	221
15a5bfe4	222	return std_scan_complete(di, devices);
7b4edcb6 MH	223	}
7b4edcb6 MH	224
1a863916 UH	225	/**
	226	* Scan for Metrahit 2x in a bidirectional mode using Gossen Metrawatt
	227	* 'BD 232' interface.
c90beca7	228	*/
4f840ce9	229	static GSList scan_2x_bd232(struct sr_dev_driver di, GSList *options)
c90beca7 MH	230	{
c90beca7 MH	231	struct sr_dev_inst *sdi;
c90beca7 MH	232	struct dev_context *devc;
c90beca7 MH	233	struct sr_config *src;
c90beca7 MH	234	struct sr_serial_dev_inst *serial;
	235	GSList l, devices;
	236	const char conn, serialcomm;
	237	int cnt, byte;
	238	gint64 timeout_us;
	239
	240	sdi = NULL;
	241	devc = NULL;
	242	conn = serialcomm = NULL;
	243	devices = NULL;
	244
c90beca7 MH	245	sr_spew("scan_2x_bd232() called!");
	246
	247	for (l = options; l; l = l->next) {
	248	src = l->data;
	249	switch (src->key) {
	250	case SR_CONF_CONN:
	251	conn = g_variant_get_string(src->data, NULL);
	252	break;
	253	case SR_CONF_SERIALCOMM:
	254	serialcomm = g_variant_get_string(src->data, NULL);
	255	break;
	256	}
	257	}
	258	if (!conn)
	259	return NULL;
	260	if (!serialcomm)
	261	serialcomm = SERIALCOMM_2X;
	262
91219afc	263	serial = sr_serial_dev_inst_new(conn, serialcomm);
c90beca7	264
e13e354f	265	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
c90beca7 MH	266	goto exit_err;
c90beca7 MH	267
f57d8ffe	268	devc = g_malloc0(sizeof(struct dev_context));
c90beca7	269
aac29cc1	270	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	271	sdi->status = SR_ST_INACTIVE;
0af636be UH	272	sdi->vendor = g_strdup(VENDOR_GMC);
c90beca7 MH	273	sdi->priv = devc;
	274
	275	/* Send message 03 "Query multimeter version and status" */
	276	sdi->conn = serial;
c90beca7 MH	277	if (req_stat14(sdi, TRUE) != SR_OK)
	278	goto exit_err;
	279
	280	/* Wait for reply from device(s) for up to 2s. */
1a46cc62	281	timeout_us = g_get_monotonic_time() + (2 * 1000 * 1000);
c90beca7 MH	282
	283	while (timeout_us > g_get_monotonic_time()) {
	284	/* Receive reply (14 bytes) */
	285	devc->buflen = 0;
07ffa5b3	286	for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
c90beca7 MH	287	byte = read_byte(serial, timeout_us);
	288	if (byte != -1)
	289	devc->buf[devc->buflen++] = (byte & MASK_6BITS);
	290	}
	291
07ffa5b3	292	if (devc->buflen != GMC_REPLY_SIZE)
c90beca7 MH	293	continue;
	294
	295	devc->addr = devc->buf[0];
	296	process_msg14(sdi);
	297	devc->buflen = 0;
	298
	299	if (devc->model != METRAHIT_NONE) {
	300	sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(devc->model));
3c413879	301	sr_sw_limits_init(&devc->limits);
c90beca7 MH	302	sdi->model = g_strdup(gmc_model_str(devc->model));
	303	sdi->version = g_strdup_printf("Firmware %d.%d", devc->fw_ver_maj, devc->fw_ver_min);
	304	sdi->conn = serial;
	305	sdi->priv = devc;
5e23fcab	306	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
c90beca7	307	devices = g_slist_append(devices, sdi);
f57d8ffe	308	devc = g_malloc0(sizeof(struct dev_context));
aac29cc1	309	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	310	sdi->status = SR_ST_INACTIVE;
0af636be UH	311	sdi->vendor = g_strdup(VENDOR_GMC);
c90beca7 MH	312	}
	313	};
	314
	315	/* Free last alloc if no device found */
	316	if (devc->model == METRAHIT_NONE) {
	317	g_free(devc);
	318	sr_dev_inst_free(sdi);
	319	}
	320
15a5bfe4	321	return std_scan_complete(di, devices);
c90beca7 MH	322
	323	exit_err:
	324	sr_info("scan_2x_bd232(): Error!");
	325
04891a99	326	sr_serial_dev_inst_free(serial);
b1f83103	327	g_free(devc);
4bf93988	328	sr_dev_inst_free(sdi);
c90beca7 MH	329
	330	return NULL;
	331	}
	332
7b4edcb6 MH	333	static int dev_close(struct sr_dev_inst *sdi)
7b4edcb6 MH	334	{
f5792417	335	struct dev_context *devc;
7b4edcb6	336
f1ba6b4b	337	devc = sdi->priv;
7b4edcb6	338
f1ba6b4b	339	devc->model = METRAHIT_NONE;
f5792417	340
f1ba6b4b	341	return std_serial_dev_close(sdi);
7b4edcb6 MH	342	}
7b4edcb6 MH	343
584560f1 BV	344	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
584560f1 BV	345	const struct sr_channel_group *cg)
7b4edcb6 MH	346	{
7b4edcb6 MH	347	int ret;
fadd0707	348	struct dev_context *devc;
c90beca7	349
53b4680f	350	(void)cg;
c90beca7	351
709468ba	352	if (!sdi)
6392d599 MH	353	return SR_ERR_ARG;
6392d599 MH	354
709468ba UH	355	devc = sdi->priv;
709468ba UH	356
7b4edcb6 MH	357	ret = SR_OK;
7b4edcb6 MH	358	switch (key) {
6392d599	359	case SR_CONF_LIMIT_SAMPLES:
6392d599	360	case SR_CONF_LIMIT_MSEC:
3c413879	361	return sr_sw_limits_config_get(&devc->limits, key, data);
c90beca7 MH	362	case SR_CONF_POWER_OFF:
	363	*data = g_variant_new_boolean(FALSE);
	364	break;
7b4edcb6 MH	365	default:
	366	return SR_ERR_NA;
	367	}
	368
	369	return ret;
	370	}
	371
1a863916	372	/** Implementation of config_list, auxiliary function for common parts. */
584560f1 BV	373	static int config_list_common(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
584560f1 BV	374	const struct sr_channel_group *cg)
7b4edcb6	375	{
c90beca7	376	(void)sdi;
53b4680f	377	(void)cg;
7b4edcb6	378
7b4edcb6	379	switch (key) {
c90beca7	380	case SR_CONF_SCAN_OPTIONS:
584560f1	381	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
5827f61b	382	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
f5792417	383	break;
7b4edcb6	384	default:
f5792417	385	return SR_ERR_NA;
7b4edcb6 MH	386	}
7b4edcb6 MH	387
f5792417	388	return SR_OK;
7b4edcb6 MH	389	}
7b4edcb6 MH	390
c90beca7	391	/** Implementation of config_list for Metrahit 1x/2x send mode */
584560f1	392	static int config_list_sm(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	393	const struct sr_channel_group *cg)
7b4edcb6	394	{
7b4edcb6	395	switch (key) {
c90beca7	396	case SR_CONF_DEVICE_OPTIONS:
584560f1	397	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
5827f61b	398	devopts_sm, ARRAY_SIZE(devopts_sm), sizeof(uint32_t));
f5792417	399	break;
c90beca7	400	default:
53b4680f	401	return config_list_common(key, data, sdi, cg);
c90beca7 MH	402	}
	403
	404	return SR_OK;
	405	}
	406
	407	/** Implementation of config_list for Metrahit 2x bidirectional mode */
584560f1	408	static int config_list_bd(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	409	const struct sr_channel_group *cg)
c90beca7	410	{
c90beca7	411	switch (key) {
f5792417	412	case SR_CONF_DEVICE_OPTIONS:
584560f1	413	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
5827f61b	414	devopts_bd, ARRAY_SIZE(devopts_bd), sizeof(uint32_t));
f5792417	415	break;
7b4edcb6	416	default:
53b4680f	417	return config_list_common(key, data, sdi, cg);
7b4edcb6 MH	418	}
7b4edcb6 MH	419
f5792417	420	return SR_OK;
7b4edcb6 MH	421	}
7b4edcb6 MH	422
695dc859	423	static int dev_acquisition_start_1x_2x_rs232(const struct sr_dev_inst *sdi)
7b4edcb6	424	{
f5792417 MH	425	struct dev_context *devc;
	426	struct sr_serial_dev_inst *serial;
	427
208c1d35	428	devc = sdi->priv;
f5792417 MH	429	devc->settings_ok = FALSE;
	430	devc->buflen = 0;
	431
3c413879	432	sr_sw_limits_acquisition_start(&devc->limits);
bee2b016	433	std_session_send_df_header(sdi);
f5792417	434
f5792417 MH	435	/* Poll every 40ms, or whenever some data comes in. */
f5792417 MH	436	serial = sdi->conn;
102f1239 BV	437	serial_source_add(sdi->session, serial, G_IO_IN, 40,
102f1239 BV	438	gmc_mh_1x_2x_receive_data, (void *)sdi);
7b4edcb6 MH	439
	440	return SR_OK;
	441	}
	442
695dc859	443	static int dev_acquisition_start_2x_bd232(const struct sr_dev_inst *sdi)
c90beca7 MH	444	{
	445	struct dev_context *devc;
	446	struct sr_serial_dev_inst *serial;
	447
208c1d35	448	devc = sdi->priv;
c90beca7 MH	449	devc->settings_ok = FALSE;
	450	devc->buflen = 0;
	451
3c413879	452	sr_sw_limits_acquisition_start(&devc->limits);
bee2b016	453	std_session_send_df_header(sdi);
c90beca7	454
c90beca7 MH	455	/* Poll every 40ms, or whenever some data comes in. */
c90beca7 MH	456	serial = sdi->conn;
102f1239 BV	457	serial_source_add(sdi->session, serial, G_IO_IN, 40,
102f1239 BV	458	gmc_mh_2x_receive_data, (void *)sdi);
c90beca7 MH	459
	460	/* Send start message */
	461	return req_meas14(sdi);
	462	}
	463
dd5c48a6	464	static struct sr_dev_driver gmc_mh_1x_2x_rs232_driver_info = {
7b4edcb6	465	.name = "gmc-mh-1x-2x-rs232",
a90061e5	466	.longname = "Gossen Metrawatt Metrahit 1x/2x, RS232 interface",
7b4edcb6	467	.api_version = 1,
c2fdcc25	468	.init = std_init,
700d6b64	469	.cleanup = std_cleanup,
c90beca7	470	.scan = scan_1x_2x_rs232,
c01bf34c	471	.dev_list = std_dev_list,
a6630742	472	.dev_clear = NULL,
c90beca7 MH	473	.config_get = config_get,
	474	.config_set = config_set,
	475	.config_list = config_list_sm,
	476	.dev_open = std_serial_dev_open,
	477	.dev_close = dev_close,
	478	.dev_acquisition_start = dev_acquisition_start_1x_2x_rs232,
4b1a9d5d	479	.dev_acquisition_stop = std_serial_dev_acquisition_stop,
41812aca	480	.context = NULL,
c90beca7	481	};
dd5c48a6	482	SR_REGISTER_DEV_DRIVER(gmc_mh_1x_2x_rs232_driver_info);
c90beca7	483
dd5c48a6	484	static struct sr_dev_driver gmc_mh_2x_bd232_driver_info = {
c90beca7	485	.name = "gmc-mh-2x-bd232",
a90061e5	486	.longname = "Gossen Metrawatt Metrahit 2x, BD232/SI232-II interface",
c90beca7	487	.api_version = 1,
c2fdcc25	488	.init = std_init,
700d6b64	489	.cleanup = std_cleanup,
c90beca7	490	.scan = scan_2x_bd232,
c01bf34c	491	.dev_list = std_dev_list,
a6630742	492	.dev_clear = NULL,
7b4edcb6 MH	493	.config_get = config_get,
7b4edcb6 MH	494	.config_set = config_set,
c90beca7	495	.config_list = config_list_bd,
854434de	496	.dev_open = std_serial_dev_open,
7b4edcb6	497	.dev_close = dev_close,
c90beca7	498	.dev_acquisition_start = dev_acquisition_start_2x_bd232,
4b1a9d5d	499	.dev_acquisition_stop = std_serial_dev_acquisition_stop,
41812aca	500	.context = NULL,
7b4edcb6	501	};
dd5c48a6	502	SR_REGISTER_DEV_DRIVER(gmc_mh_2x_bd232_driver_info);