[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
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013, 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
	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	/**
	21	* @file
	22	*
	23	* Gossen Metrawatt Metrahit 1x/2x drivers
	24	*
	25	* @internal
	26	*/
	27
	28	#include <config.h>
	29	#include <string.h>
	30	#include "protocol.h"
	31
	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"
	35	#define SERIALCOMM_2X "9600/8n1/dtr=1/rts=1/flow=0"
	36	#define VENDOR_GMC "Gossen Metrawatt"
	37
	38	static const uint32_t scanopts[] = {
	39	SR_CONF_CONN,
	40	SR_CONF_SERIALCOMM,
	41	};
	42
	43	/** Hardware capabilities for Metrahit 1x/2x devices in send mode. */
	44	static const uint32_t devopts_sm[] = {
	45	SR_CONF_MULTIMETER,
	46	SR_CONF_THERMOMETER, /*< All GMC 1x/2x multimeters seem to support this /
	47	SR_CONF_CONTINUOUS,
	48	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	49	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	50	};
	51
	52	/** Hardware capabilities for Metrahit 2x devices in bidirectional Mode. */
	53	static const uint32_t devopts_bd[] = {
	54	SR_CONF_MULTIMETER,
	55	SR_CONF_THERMOMETER, /*< All GMC 1x/2x multimeters seem to support this /
	56	SR_CONF_CONTINUOUS,
	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,
	60	};
	61
	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
	69	/**
	70	* Read single byte from serial port.
	71	*
	72	* @retval -1 Timeout or error.
	73	* @retval other Byte.
	74	*/
	75	static int read_byte(struct sr_serial_dev_inst *serial, gint64 timeout)
	76	{
	77	uint8_t result = 0;
	78	int rc = 0;
	79
	80	for (;;) {
	81	rc = serial_read_nonblocking(serial, &result, 1);
	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
	92	/**
	93	* Try to detect GMC 1x/2x multimeter model in send mode for max. 1 second.
	94	*
	95	* @param serial Configured, open serial port.
	96	*
	97	* @retval NULL Detection failed.
	98	* @retval other Model code.
	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
	106	model = METRAHIT_NONE;
	107	timeout_us = g_get_monotonic_time() + (1 * 1000 * 1000);
	108
	109	/*
	110	* Try to find message consisting of device code and several
	111	* (at least 4) data bytes.
	112	*/
	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) {
	118	if (!(model = gmc_decode_model_sm(byte & MSGC_MASK)))
	119	break;
	120	/* Now expect (at least) 4 data bytes. */
	121	for (cnt = 0; cnt < 4; cnt++) {
	122	byte = read_byte(serial, timeout_us);
	123	if ((byte == -1) \|\|
	124	((byte & MSGID_MASK) != MSGID_DATA))
	125	{
	126	model = METRAHIT_NONE;
	127	bytecnt = 100;
	128	break;
	129	}
	130	}
	131	break;
	132	}
	133	}
	134
	135	return model;
	136	}
	137
	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.
	146	*/
	147	static GSList scan_1x_2x_rs232(struct sr_dev_driver di, GSList *options)
	148	{
	149	struct sr_dev_inst *sdi;
	150	struct dev_context *devc;
	151	struct sr_config *src;
	152	struct sr_serial_dev_inst *serial;
	153	GSList l, devices;
	154	const char conn, serialcomm;
	155	enum model model;
	156	gboolean serialcomm_given;
	157
	158	devices = NULL;
	159	conn = serialcomm = NULL;
	160	serialcomm_given = FALSE;
	161
	162	sr_spew("scan_1x_2x_rs232() called!");
	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
	181	serial = sr_serial_dev_inst_new(conn, serialcomm);
	182
	183	if (serial_open(serial, SERIAL_RDWR) != SR_OK) {
	184	sr_serial_dev_inst_free(serial);
	185	return NULL;
	186	}
	187
	188	serial_flush(serial);
	189
	190	model = scan_model_sm(serial);
	191
	192	/*
	193	* If detection failed and no user-supplied parameters,
	194	* try second baud rate.
	195	*/
	196	if ((model == METRAHIT_NONE) && !serialcomm_given) {
	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
	206	if (model != METRAHIT_NONE) {
	207	sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(model));
	208	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	209	sdi->status = SR_ST_INACTIVE;
	210	sdi->vendor = g_strdup(VENDOR_GMC);
	211	sdi->model = g_strdup(gmc_model_str(model));
	212	devc = g_malloc0(sizeof(struct dev_context));
	213	sr_sw_limits_init(&devc->limits);
	214	devc->model = model;
	215	devc->settings_ok = FALSE;
	216	sdi->conn = serial;
	217	sdi->priv = devc;
	218	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
	219	devices = g_slist_append(devices, sdi);
	220	}
	221
	222	return std_scan_complete(di, devices);
	223	}
	224
	225	/**
	226	* Scan for Metrahit 2x in a bidirectional mode using Gossen Metrawatt
	227	* 'BD 232' interface.
	228	*/
	229	static GSList scan_2x_bd232(struct sr_dev_driver di, GSList *options)
	230	{
	231	struct sr_dev_inst *sdi;
	232	struct dev_context *devc;
	233	struct sr_config *src;
	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
	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
	263	serial = sr_serial_dev_inst_new(conn, serialcomm);
	264
	265	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	266	goto exit_err;
	267
	268	devc = g_malloc0(sizeof(struct dev_context));
	269
	270	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	271	sdi->status = SR_ST_INACTIVE;
	272	sdi->vendor = g_strdup(VENDOR_GMC);
	273	sdi->priv = devc;
	274
	275	/* Send message 03 "Query multimeter version and status" */
	276	sdi->conn = serial;
	277	if (req_stat14(sdi, TRUE) != SR_OK)
	278	goto exit_err;
	279
	280	/* Wait for reply from device(s) for up to 2s. */
	281	timeout_us = g_get_monotonic_time() + (2 * 1000 * 1000);
	282
	283	while (timeout_us > g_get_monotonic_time()) {
	284	/* Receive reply (14 bytes) */
	285	devc->buflen = 0;
	286	for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
	287	byte = read_byte(serial, timeout_us);
	288	if (byte != -1)
	289	devc->buf[devc->buflen++] = (byte & MASK_6BITS);
	290	}
	291
	292	if (devc->buflen != GMC_REPLY_SIZE)
	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));
	301	sr_sw_limits_init(&devc->limits);
	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;
	306	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
	307	devices = g_slist_append(devices, sdi);
	308	devc = g_malloc0(sizeof(struct dev_context));
	309	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	310	sdi->status = SR_ST_INACTIVE;
	311	sdi->vendor = g_strdup(VENDOR_GMC);
	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
	321	return std_scan_complete(di, devices);
	322
	323	exit_err:
	324	sr_info("scan_2x_bd232(): Error!");
	325
	326	sr_serial_dev_inst_free(serial);
	327	g_free(devc);
	328	sr_dev_inst_free(sdi);
	329
	330	return NULL;
	331	}
	332
	333	static int dev_close(struct sr_dev_inst *sdi)
	334	{
	335	struct dev_context *devc;
	336
	337	devc = sdi->priv;
	338
	339	devc->model = METRAHIT_NONE;
	340
	341	return std_serial_dev_close(sdi);
	342	}
	343
	344	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	345	const struct sr_channel_group *cg)
	346	{
	347	int ret;
	348	struct dev_context *devc;
	349
	350	(void)cg;
	351
	352	if (!sdi)
	353	return SR_ERR_ARG;
	354
	355	devc = sdi->priv;
	356
	357	ret = SR_OK;
	358	switch (key) {
	359	case SR_CONF_LIMIT_SAMPLES:
	360	case SR_CONF_LIMIT_MSEC:
	361	return sr_sw_limits_config_get(&devc->limits, key, data);
	362	case SR_CONF_POWER_OFF:
	363	*data = g_variant_new_boolean(FALSE);
	364	break;
	365	default:
	366	return SR_ERR_NA;
	367	}
	368
	369	return ret;
	370	}
	371
	372	/** Implementation of config_list, auxiliary function for common parts. */
	373	static int config_list_common(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	374	const struct sr_channel_group *cg)
	375	{
	376	(void)sdi;
	377	(void)cg;
	378
	379	switch (key) {
	380	case SR_CONF_SCAN_OPTIONS:
	381	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	382	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	383	break;
	384	default:
	385	return SR_ERR_NA;
	386	}
	387
	388	return SR_OK;
	389	}
	390
	391	/** Implementation of config_list for Metrahit 1x/2x send mode */
	392	static int config_list_sm(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	393	const struct sr_channel_group *cg)
	394	{
	395	switch (key) {
	396	case SR_CONF_DEVICE_OPTIONS:
	397	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	398	devopts_sm, ARRAY_SIZE(devopts_sm), sizeof(uint32_t));
	399	break;
	400	default:
	401	return config_list_common(key, data, sdi, cg);
	402	}
	403
	404	return SR_OK;
	405	}
	406
	407	/** Implementation of config_list for Metrahit 2x bidirectional mode */
	408	static int config_list_bd(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	409	const struct sr_channel_group *cg)
	410	{
	411	switch (key) {
	412	case SR_CONF_DEVICE_OPTIONS:
	413	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	414	devopts_bd, ARRAY_SIZE(devopts_bd), sizeof(uint32_t));
	415	break;
	416	default:
	417	return config_list_common(key, data, sdi, cg);
	418	}
	419
	420	return SR_OK;
	421	}
	422
	423	static int dev_acquisition_start_1x_2x_rs232(const struct sr_dev_inst *sdi)
	424	{
	425	struct dev_context *devc;
	426	struct sr_serial_dev_inst *serial;
	427
	428	devc = sdi->priv;
	429	devc->settings_ok = FALSE;
	430	devc->buflen = 0;
	431
	432	sr_sw_limits_acquisition_start(&devc->limits);
	433	std_session_send_df_header(sdi);
	434
	435	/* Poll every 40ms, or whenever some data comes in. */
	436	serial = sdi->conn;
	437	serial_source_add(sdi->session, serial, G_IO_IN, 40,
	438	gmc_mh_1x_2x_receive_data, (void *)sdi);
	439
	440	return SR_OK;
	441	}
	442
	443	static int dev_acquisition_start_2x_bd232(const struct sr_dev_inst *sdi)
	444	{
	445	struct dev_context *devc;
	446	struct sr_serial_dev_inst *serial;
	447
	448	devc = sdi->priv;
	449	devc->settings_ok = FALSE;
	450	devc->buflen = 0;
	451
	452	sr_sw_limits_acquisition_start(&devc->limits);
	453	std_session_send_df_header(sdi);
	454
	455	/* Poll every 40ms, or whenever some data comes in. */
	456	serial = sdi->conn;
	457	serial_source_add(sdi->session, serial, G_IO_IN, 40,
	458	gmc_mh_2x_receive_data, (void *)sdi);
	459
	460	/* Send start message */
	461	return req_meas14(sdi);
	462	}
	463
	464	static struct sr_dev_driver gmc_mh_1x_2x_rs232_driver_info = {
	465	.name = "gmc-mh-1x-2x-rs232",
	466	.longname = "Gossen Metrawatt Metrahit 1x/2x, RS232 interface",
	467	.api_version = 1,
	468	.init = std_init,
	469	.cleanup = std_cleanup,
	470	.scan = scan_1x_2x_rs232,
	471	.dev_list = std_dev_list,
	472	.dev_clear = NULL,
	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,
	479	.dev_acquisition_stop = std_serial_dev_acquisition_stop,
	480	.context = NULL,
	481	};
	482	SR_REGISTER_DEV_DRIVER(gmc_mh_1x_2x_rs232_driver_info);
	483
	484	static struct sr_dev_driver gmc_mh_2x_bd232_driver_info = {
	485	.name = "gmc-mh-2x-bd232",
	486	.longname = "Gossen Metrawatt Metrahit 2x, BD232/SI232-II interface",
	487	.api_version = 1,
	488	.init = std_init,
	489	.cleanup = std_cleanup,
	490	.scan = scan_2x_bd232,
	491	.dev_list = std_dev_list,
	492	.dev_clear = NULL,
	493	.config_get = config_get,
	494	.config_set = config_set,
	495	.config_list = config_list_bd,
	496	.dev_open = std_serial_dev_open,
	497	.dev_close = dev_close,
	498	.dev_acquisition_start = dev_acquisition_start_2x_bd232,
	499	.dev_acquisition_stop = std_serial_dev_acquisition_stop,
	500	.context = NULL,
	501	};
	502	SR_REGISTER_DEV_DRIVER(gmc_mh_2x_bd232_driver_info);