[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!");

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

	return NULL;
}

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

	std_serial_dev_close(sdi);

	sdi->status = SR_ST_INACTIVE;
	if ((devc = sdi->priv))
		devc->model = METRAHIT_NONE;

	return SR_OK;
}

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;

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

	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;

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

	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 int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	return std_serial_dev_acquisition_stop(sdi, dev_close);
}

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 = 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 = 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	/** @file
	21	* Gossen Metrawatt Metrahit 1x/2x drivers
	22	* @internal
	23	*/
	24
	25	#include <config.h>
	26	#include <string.h>
	27	#include "protocol.h"
	28
	29	/* Serial communication parameters for Metrahit 1x/2x with 'RS232' adaptor */
	30	#define SERIALCOMM_1X_RS232 "8228/6n1/dtr=1/rts=1/flow=0" /* =8192, closer with divider */
	31	#define SERIALCOMM_2X_RS232 "9600/6n1/dtr=1/rts=1/flow=0"
	32	#define SERIALCOMM_2X "9600/8n1/dtr=1/rts=1/flow=0"
	33	#define VENDOR_GMC "Gossen Metrawatt"
	34
	35	static const uint32_t scanopts[] = {
	36	SR_CONF_CONN,
	37	SR_CONF_SERIALCOMM,
	38	};
	39
	40	/** Hardware capabilities for Metrahit 1x/2x devices in send mode. */
	41	static const uint32_t devopts_sm[] = {
	42	SR_CONF_MULTIMETER,
	43	SR_CONF_THERMOMETER, /*< All GMC 1x/2x multimeters seem to support this /
	44	SR_CONF_CONTINUOUS,
	45	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	46	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	47	};
	48
	49	/** Hardware capabilities for Metrahit 2x devices in bidirectional Mode. */
	50	static const uint32_t devopts_bd[] = {
	51	SR_CONF_MULTIMETER,
	52	SR_CONF_THERMOMETER, /*< All GMC 1x/2x multimeters seem to support this /
	53	SR_CONF_CONTINUOUS,
	54	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	55	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	56	SR_CONF_POWER_OFF \| SR_CONF_GET \| SR_CONF_SET,
	57	};
	58
	59	/* TODO:
	60	* - For the 29S SR_CONF_ENERGYMETER, too.
	61	* - SR_CONF_PATTERN_MODE for some 2x devices
	62	* - SR_CONF_DATALOG for 22M, 26M, 29S and storage adaptors.
	63	* Need to implement device-specific lists.
	64	*/
	65
	66	/**
	67	* Read single byte from serial port.
	68	*
	69	* @retval -1 Timeout or error.
	70	* @retval other Byte.
	71	*/
	72	static int read_byte(struct sr_serial_dev_inst *serial, gint64 timeout)
	73	{
	74	uint8_t result = 0;
	75	int rc = 0;
	76
	77	for (;;) {
	78	rc = serial_read_nonblocking(serial, &result, 1);
	79	if (rc == 1) {
	80	sr_spew("read: 0x%02x/%d", result, result);
	81	return result;
	82	}
	83	if (g_get_monotonic_time() > timeout)
	84	return -1;
	85	g_usleep(2000);
	86	}
	87	}
	88
	89	/**
	90	* Try to detect GMC 1x/2x multimeter model in send mode for max. 1 second.
	91	*
	92	* @param serial Configured, open serial port.
	93	*
	94	* @retval NULL Detection failed.
	95	* @retval other Model code.
	96	*/
	97	static enum model scan_model_sm(struct sr_serial_dev_inst *serial)
	98	{
	99	int byte, bytecnt, cnt;
	100	enum model model;
	101	gint64 timeout_us;
	102
	103	model = METRAHIT_NONE;
	104	timeout_us = g_get_monotonic_time() + (1 * 1000 * 1000);
	105
	106	/*
	107	* Try to find message consisting of device code and several
	108	* (at least 4) data bytes.
	109	*/
	110	for (bytecnt = 0; bytecnt < 100; bytecnt++) {
	111	byte = read_byte(serial, timeout_us);
	112	if ((byte == -1) \|\| (timeout_us < g_get_monotonic_time()))
	113	break;
	114	if ((byte & MSGID_MASK) == MSGID_INF) {
	115	if (!(model = gmc_decode_model_sm(byte & MSGC_MASK)))
	116	break;
	117	/* Now expect (at least) 4 data bytes. */
	118	for (cnt = 0; cnt < 4; cnt++) {
	119	byte = read_byte(serial, timeout_us);
	120	if ((byte == -1) \|\|
	121	((byte & MSGID_MASK) != MSGID_DATA))
	122	{
	123	model = METRAHIT_NONE;
	124	bytecnt = 100;
	125	break;
	126	}
	127	}
	128	break;
	129	}
	130	}
	131
	132	return model;
	133	}
	134
	135	/**
	136	* Scan for Metrahit 1x and Metrahit 2x in send mode using Gossen Metrawatt
	137	* 'RS232' interface.
	138	*
	139	* The older 1x models use 8192 baud and the newer 2x 9600 baud.
	140	* The DMM usually sends up to about 20 messages per second. However, depending
	141	* on configuration and measurement mode the intervals can be much larger and
	142	* then the detection might not work.
	143	*/
	144	static GSList scan_1x_2x_rs232(struct sr_dev_driver di, GSList *options)
	145	{
	146	struct sr_dev_inst *sdi;
	147	struct dev_context *devc;
	148	struct sr_config *src;
	149	struct sr_serial_dev_inst *serial;
	150	GSList l, devices;
	151	const char conn, serialcomm;
	152	enum model model;
	153	gboolean serialcomm_given;
	154
	155	devices = NULL;
	156	conn = serialcomm = NULL;
	157	serialcomm_given = FALSE;
	158
	159	sr_spew("scan_1x_2x_rs232() called!");
	160
	161	for (l = options; l; l = l->next) {
	162	src = l->data;
	163	switch (src->key) {
	164	case SR_CONF_CONN:
	165	conn = g_variant_get_string(src->data, NULL);
	166	break;
	167	case SR_CONF_SERIALCOMM:
	168	serialcomm = g_variant_get_string(src->data, NULL);
	169	serialcomm_given = TRUE;
	170	break;
	171	}
	172	}
	173	if (!conn)
	174	return NULL;
	175	if (!serialcomm)
	176	serialcomm = SERIALCOMM_2X_RS232;
	177
	178	serial = sr_serial_dev_inst_new(conn, serialcomm);
	179
	180	if (serial_open(serial, SERIAL_RDWR) != SR_OK) {
	181	sr_serial_dev_inst_free(serial);
	182	return NULL;
	183	}
	184
	185	serial_flush(serial);
	186
	187	model = scan_model_sm(serial);
	188
	189	/*
	190	* If detection failed and no user-supplied parameters,
	191	* try second baud rate.
	192	*/
	193	if ((model == METRAHIT_NONE) && !serialcomm_given) {
	194	serialcomm = SERIALCOMM_1X_RS232;
	195	g_free(serial->serialcomm);
	196	serial->serialcomm = g_strdup(serialcomm);
	197	if (serial_set_paramstr(serial, serialcomm) == SR_OK) {
	198	serial_flush(serial);
	199	model = scan_model_sm(serial);
	200	}
	201	}
	202
	203	if (model != METRAHIT_NONE) {
	204	sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(model));
	205	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	206	sdi->status = SR_ST_INACTIVE;
	207	sdi->vendor = g_strdup(VENDOR_GMC);
	208	sdi->model = g_strdup(gmc_model_str(model));
	209	devc = g_malloc0(sizeof(struct dev_context));
	210	sr_sw_limits_init(&devc->limits);
	211	devc->model = model;
	212	devc->settings_ok = FALSE;
	213	sdi->conn = serial;
	214	sdi->priv = devc;
	215	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
	216	devices = g_slist_append(devices, sdi);
	217	}
	218
	219	return std_scan_complete(di, devices);
	220	}
	221
	222	/**
	223	* Scan for Metrahit 2x in a bidirectional mode using Gossen Metrawatt
	224	* 'BD 232' interface.
	225	*/
	226	static GSList scan_2x_bd232(struct sr_dev_driver di, GSList *options)
	227	{
	228	struct sr_dev_inst *sdi;
	229	struct dev_context *devc;
	230	struct sr_config *src;
	231	struct sr_serial_dev_inst *serial;
	232	GSList l, devices;
	233	const char conn, serialcomm;
	234	int cnt, byte;
	235	gint64 timeout_us;
	236
	237	sdi = NULL;
	238	devc = NULL;
	239	conn = serialcomm = NULL;
	240	devices = NULL;
	241
	242	sr_spew("scan_2x_bd232() called!");
	243
	244	for (l = options; l; l = l->next) {
	245	src = l->data;
	246	switch (src->key) {
	247	case SR_CONF_CONN:
	248	conn = g_variant_get_string(src->data, NULL);
	249	break;
	250	case SR_CONF_SERIALCOMM:
	251	serialcomm = g_variant_get_string(src->data, NULL);
	252	break;
	253	}
	254	}
	255	if (!conn)
	256	return NULL;
	257	if (!serialcomm)
	258	serialcomm = SERIALCOMM_2X;
	259
	260	serial = sr_serial_dev_inst_new(conn, serialcomm);
	261
	262	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	263	goto exit_err;
	264
	265	devc = g_malloc0(sizeof(struct dev_context));
	266
	267	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	268	sdi->status = SR_ST_INACTIVE;
	269	sdi->vendor = g_strdup(VENDOR_GMC);
	270	sdi->priv = devc;
	271
	272	/* Send message 03 "Query multimeter version and status" */
	273	sdi->conn = serial;
	274	if (req_stat14(sdi, TRUE) != SR_OK)
	275	goto exit_err;
	276
	277	/* Wait for reply from device(s) for up to 2s. */
	278	timeout_us = g_get_monotonic_time() + (2 * 1000 * 1000);
	279
	280	while (timeout_us > g_get_monotonic_time()) {
	281	/* Receive reply (14 bytes) */
	282	devc->buflen = 0;
	283	for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
	284	byte = read_byte(serial, timeout_us);
	285	if (byte != -1)
	286	devc->buf[devc->buflen++] = (byte & MASK_6BITS);
	287	}
	288
	289	if (devc->buflen != GMC_REPLY_SIZE)
	290	continue;
	291
	292	devc->addr = devc->buf[0];
	293	process_msg14(sdi);
	294	devc->buflen = 0;
	295
	296	if (devc->model != METRAHIT_NONE) {
	297	sr_spew("%s %s detected!", VENDOR_GMC, gmc_model_str(devc->model));
	298	sr_sw_limits_init(&devc->limits);
	299	sdi->model = g_strdup(gmc_model_str(devc->model));
	300	sdi->version = g_strdup_printf("Firmware %d.%d", devc->fw_ver_maj, devc->fw_ver_min);
	301	sdi->conn = serial;
	302	sdi->priv = devc;
	303	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
	304	devices = g_slist_append(devices, sdi);
	305	devc = g_malloc0(sizeof(struct dev_context));
	306	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	307	sdi->status = SR_ST_INACTIVE;
	308	sdi->vendor = g_strdup(VENDOR_GMC);
	309	}
	310	};
	311
	312	/* Free last alloc if no device found */
	313	if (devc->model == METRAHIT_NONE) {
	314	g_free(devc);
	315	sr_dev_inst_free(sdi);
	316	}
	317
	318	return std_scan_complete(di, devices);
	319
	320	exit_err:
	321	sr_info("scan_2x_bd232(): Error!");
	322
	323	if (serial)
	324	sr_serial_dev_inst_free(serial);
	325	g_free(devc);
	326	if (sdi)
	327	sr_dev_inst_free(sdi);
	328
	329	return NULL;
	330	}
	331
	332	static int dev_close(struct sr_dev_inst *sdi)
	333	{
	334	struct dev_context *devc;
	335
	336	std_serial_dev_close(sdi);
	337
	338	sdi->status = SR_ST_INACTIVE;
	339	if ((devc = sdi->priv))
	340	devc->model = METRAHIT_NONE;
	341
	342	return SR_OK;
	343	}
	344
	345	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	346	const struct sr_channel_group *cg)
	347	{
	348	int ret;
	349	struct dev_context *devc;
	350
	351	(void)cg;
	352
	353	if (!sdi)
	354	return SR_ERR_ARG;
	355
	356	devc = sdi->priv;
	357
	358	ret = SR_OK;
	359	switch (key) {
	360	case SR_CONF_LIMIT_SAMPLES:
	361	case SR_CONF_LIMIT_MSEC:
	362	return sr_sw_limits_config_get(&devc->limits, key, data);
	363	case SR_CONF_POWER_OFF:
	364	*data = g_variant_new_boolean(FALSE);
	365	break;
	366	default:
	367	return SR_ERR_NA;
	368	}
	369
	370	return ret;
	371	}
	372
	373	/** Implementation of config_list, auxiliary function for common parts. */
	374	static int config_list_common(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	375	const struct sr_channel_group *cg)
	376	{
	377	(void)sdi;
	378	(void)cg;
	379
	380	switch (key) {
	381	case SR_CONF_SCAN_OPTIONS:
	382	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	383	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	384	break;
	385	default:
	386	return SR_ERR_NA;
	387	}
	388
	389	return SR_OK;
	390	}
	391
	392	/** Implementation of config_list for Metrahit 1x/2x send mode */
	393	static int config_list_sm(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	394	const struct sr_channel_group *cg)
	395	{
	396	switch (key) {
	397	case SR_CONF_DEVICE_OPTIONS:
	398	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	399	devopts_sm, ARRAY_SIZE(devopts_sm), sizeof(uint32_t));
	400	break;
	401	default:
	402	return config_list_common(key, data, sdi, cg);
	403	}
	404
	405	return SR_OK;
	406	}
	407
	408	/** Implementation of config_list for Metrahit 2x bidirectional mode */
	409	static int config_list_bd(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	410	const struct sr_channel_group *cg)
	411	{
	412	switch (key) {
	413	case SR_CONF_DEVICE_OPTIONS:
	414	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	415	devopts_bd, ARRAY_SIZE(devopts_bd), sizeof(uint32_t));
	416	break;
	417	default:
	418	return config_list_common(key, data, sdi, cg);
	419	}
	420
	421	return SR_OK;
	422	}
	423
	424	static int dev_acquisition_start_1x_2x_rs232(const struct sr_dev_inst *sdi)
	425	{
	426	struct dev_context *devc;
	427	struct sr_serial_dev_inst *serial;
	428
	429	if (sdi->status != SR_ST_ACTIVE)
	430	return SR_ERR_DEV_CLOSED;
	431
	432	devc = sdi->priv;
	433	devc->settings_ok = FALSE;
	434	devc->buflen = 0;
	435
	436	sr_sw_limits_acquisition_start(&devc->limits);
	437	std_session_send_df_header(sdi);
	438
	439	/* Poll every 40ms, or whenever some data comes in. */
	440	serial = sdi->conn;
	441	serial_source_add(sdi->session, serial, G_IO_IN, 40,
	442	gmc_mh_1x_2x_receive_data, (void *)sdi);
	443
	444	return SR_OK;
	445	}
	446
	447	static int dev_acquisition_start_2x_bd232(const struct sr_dev_inst *sdi)
	448	{
	449	struct dev_context *devc;
	450	struct sr_serial_dev_inst *serial;
	451
	452	if (sdi->status != SR_ST_ACTIVE)
	453	return SR_ERR_DEV_CLOSED;
	454
	455	devc = sdi->priv;
	456	devc->settings_ok = FALSE;
	457	devc->buflen = 0;
	458
	459	sr_sw_limits_acquisition_start(&devc->limits);
	460	std_session_send_df_header(sdi);
	461
	462	/* Poll every 40ms, or whenever some data comes in. */
	463	serial = sdi->conn;
	464	serial_source_add(sdi->session, serial, G_IO_IN, 40,
	465	gmc_mh_2x_receive_data, (void *)sdi);
	466
	467	/* Send start message */
	468	return req_meas14(sdi);
	469	}
	470
	471	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	472	{
	473	return std_serial_dev_acquisition_stop(sdi, dev_close);
	474	}
	475
	476	static struct sr_dev_driver gmc_mh_1x_2x_rs232_driver_info = {
	477	.name = "gmc-mh-1x-2x-rs232",
	478	.longname = "Gossen Metrawatt Metrahit 1x/2x, RS232 interface",
	479	.api_version = 1,
	480	.init = std_init,
	481	.cleanup = std_cleanup,
	482	.scan = scan_1x_2x_rs232,
	483	.dev_list = std_dev_list,
	484	.dev_clear = NULL,
	485	.config_get = config_get,
	486	.config_set = config_set,
	487	.config_list = config_list_sm,
	488	.dev_open = std_serial_dev_open,
	489	.dev_close = dev_close,
	490	.dev_acquisition_start = dev_acquisition_start_1x_2x_rs232,
	491	.dev_acquisition_stop = dev_acquisition_stop,
	492	.context = NULL,
	493	};
	494	SR_REGISTER_DEV_DRIVER(gmc_mh_1x_2x_rs232_driver_info);
	495
	496	static struct sr_dev_driver gmc_mh_2x_bd232_driver_info = {
	497	.name = "gmc-mh-2x-bd232",
	498	.longname = "Gossen Metrawatt Metrahit 2x, BD232/SI232-II interface",
	499	.api_version = 1,
	500	.init = std_init,
	501	.cleanup = std_cleanup,
	502	.scan = scan_2x_bd232,
	503	.dev_list = std_dev_list,
	504	.dev_clear = NULL,
	505	.config_get = config_get,
	506	.config_set = config_set,
	507	.config_list = config_list_bd,
	508	.dev_open = std_serial_dev_open,
	509	.dev_close = dev_close,
	510	.dev_acquisition_start = dev_acquisition_start_2x_bd232,
	511	.dev_acquisition_stop = dev_acquisition_stop,
	512	.context = NULL,
	513	};
	514	SR_REGISTER_DEV_DRIVER(gmc_mh_2x_bd232_driver_info);