[libsigrok.git] / hardware / fluke-dmm / fluke.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
 *
 * 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 <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "config.h"
#include "fluke-dmm.h"
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>


static struct sr_datafeed_analog *handle_qm_v1(const struct sr_dev_inst *sdi,
		char **tokens)
{
	struct sr_datafeed_analog *analog;
	float fvalue;
	char *e, *u;
	gboolean is_oor;

	(void)sdi;
	if (strcmp(tokens[0], "QM"))
		return NULL;

	if ((e = strstr(tokens[1], "Out of range"))) {
		is_oor = TRUE;
		fvalue = -1;
	} else {
		is_oor = FALSE;
		fvalue = strtof(tokens[1], &e);
		if (fvalue == 0.0 && e == tokens[1]) {
			/* Happens all the time, when switching modes. */
			sr_dbg("fluke-dmm: invalid float");
			return NULL;
		}
	}
	while(*e && *e == ' ')
		e++;

	analog = g_try_malloc0(sizeof(struct sr_datafeed_analog));
	analog->num_samples = 1;
	analog->data = g_try_malloc(sizeof(float));
	if (is_oor)
		*analog->data = NAN;
	else
		*analog->data = fvalue;
	analog->mq = -1;

	if ((u = strstr(e, "V DC")) || (u = strstr(e, "V AC"))) {
		analog->mq = SR_MQ_VOLTAGE;
		analog->unit = SR_UNIT_VOLT;
		if (!is_oor && e[0] == 'm')
			*analog->data /= 1000;
		/* This catches "V AC", "V DC" and "V AC+DC". */
		if (strstr(u, "AC"))
			analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS;
		if (strstr(u, "DC"))
			analog->mqflags |= SR_MQFLAG_DC;
	} else if ((u = strstr(e, "dBV")) || (u = strstr(e, "dBm"))) {
		analog->mq = SR_MQ_VOLTAGE;
		if (u[2] == 'm')
			analog->unit = SR_UNIT_DECIBEL_MW;
		else
			analog->unit = SR_UNIT_DECIBEL_VOLT;
		analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS;
	} else if ((u = strstr(e, "Ohms"))) {
		analog->mq = SR_MQ_RESISTANCE;
		analog->unit = SR_UNIT_OHM;
		if (is_oor)
			*analog->data = INFINITY;
		else if (e[0] == 'k')
			*analog->data *= 1000;
		else if (e[0] == 'M')
			*analog->data *= 1000000;
	} else if (!strcmp(e, "nS")) {
		analog->mq = SR_MQ_CONDUCTANCE;
		analog->unit = SR_UNIT_SIEMENS;
		*analog->data /= 1e+9;
	} else if ((u = strstr(e, "Farads"))) {
		analog->mq = SR_MQ_CAPACITANCE;
		analog->unit = SR_UNIT_FARAD;
		if (!is_oor) {
			if (e[0] == 'm')
				*analog->data /= 1e+3;
			else if (e[0] == 'u')
				*analog->data /= 1e+6;
			else if (e[0] == 'n')
				*analog->data /= 1e+9;
		}
	} else if ((u = strstr(e, "Deg C")) || (u = strstr(e, "Deg F"))) {
		analog->mq = SR_MQ_TEMPERATURE;
		if (u[4] == 'C')
			analog->unit = SR_UNIT_CELSIUS;
		else
			analog->unit = SR_UNIT_FAHRENHEIT;
	} else if ((u = strstr(e, "A AC")) || (u = strstr(e, "A DC"))) {
		analog->mq = SR_MQ_CURRENT;
		analog->unit = SR_UNIT_AMPERE;
		/* This catches "A AC", "A DC" and "A AC+DC". */
		if (strstr(u, "AC"))
			analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS;
		if (strstr(u, "DC"))
			analog->mqflags |= SR_MQFLAG_DC;
		if (!is_oor) {
			if (e[0] == 'm')
				*analog->data /= 1e+3;
			else if (e[0] == 'u')
				*analog->data /= 1e+6;
		}
	} else if ((u = strstr(e, "Hz"))) {
		analog->mq = SR_MQ_FREQUENCY;
		analog->unit = SR_UNIT_HERTZ;
		if (e[0] == 'k')
			*analog->data *= 1e+3;
	} else if (!strcmp(e, "%")) {
		analog->mq = SR_MQ_DUTY_CYCLE;
		analog->unit = SR_UNIT_PERCENTAGE;
	} else if ((u = strstr(e, "ms"))) {
		analog->mq = SR_MQ_PULSE_WIDTH;
		analog->unit = SR_UNIT_SECOND;
		*analog->data /= 1e+3;
	}

	if (analog->mq == -1) {
		/* Not a valid measurement. */
		g_free(analog->data);
		g_free(analog);
		analog = NULL;
	}

	return analog;
}

static struct sr_datafeed_analog *handle_qm_v2(const struct sr_dev_inst *sdi,
		char **tokens)
{
	struct sr_datafeed_analog *analog;
	float fvalue;
	char *eptr;

	(void)sdi;
	fvalue = strtof(tokens[0], &eptr);
	if (fvalue == 0.0 && eptr == tokens[0]) {
		sr_err("fluke-dmm: invalid float");
		return NULL;
	}

	analog = g_try_malloc0(sizeof(struct sr_datafeed_analog));
	analog->num_samples = 1;
	analog->data = g_try_malloc(sizeof(float));
	*analog->data = fvalue;
	analog->mq = -1;

	if (!strcmp(tokens[1], "VAC") || !strcmp(tokens[1], "VDC")) {
		analog->mq = SR_MQ_VOLTAGE;
		analog->unit = SR_UNIT_VOLT;
		if (!strcmp(tokens[2], "NORMAL")) {
			if (tokens[1][1] == 'A') {
				analog->mqflags |= SR_MQFLAG_AC;
				analog->mqflags |= SR_MQFLAG_RMS;
			} else
				analog->mqflags |= SR_MQFLAG_DC;
		} else if (!strcmp(tokens[2], "OL") || !strcmp(tokens[2], "OL_MINUS")) {
			*analog->data = NAN;
		} else
			analog->mq = -1;
	} if (!strcmp(tokens[1], "CEL") || !strcmp(tokens[1], "FAR")) {
		if (!strcmp(tokens[2], "NORMAL")) {
			analog->mq = SR_MQ_TEMPERATURE;
			if (tokens[1][0] == 'C')
				analog->unit = SR_UNIT_CELSIUS;
			else
				analog->unit = SR_UNIT_FAHRENHEIT;
		}
	} if (!strcmp(tokens[1], "OHM")) {
		if (!strcmp(tokens[3], "NONE")) {
			analog->mq = SR_MQ_RESISTANCE;
			analog->unit = SR_UNIT_OHM;
			if (!strcmp(tokens[2], "OL") || !strcmp(tokens[2], "OL_MINUS")) {
				*analog->data = INFINITY;
			} else if (strcmp(tokens[2], "NORMAL"))
				analog->mq = -1;
		} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
			analog->mq = SR_MQ_CONTINUITY;
			analog->unit = SR_UNIT_BOOLEAN;
			*analog->data = 0.0;
		} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
			analog->mq = SR_MQ_CONTINUITY;
			analog->unit = SR_UNIT_BOOLEAN;
			*analog->data = 1.0;
		}
	} if (!strcmp(tokens[1], "F")
			&& !strcmp(tokens[2], "NORMAL")
			&& !strcmp(tokens[3], "NONE")) {
		analog->mq = SR_MQ_CAPACITANCE;
		analog->unit = SR_UNIT_FARAD;
	} else if (!strcmp(tokens[1], "AAC") || !strcmp(tokens[1], "ADC")) {
		analog->mq = SR_MQ_CURRENT;
		analog->unit = SR_UNIT_AMPERE;
		if (!strcmp(tokens[2], "NORMAL")) {
			if (tokens[1][1] == 'A') {
				analog->mqflags |= SR_MQFLAG_AC;
				analog->mqflags |= SR_MQFLAG_RMS;
			} else
				analog->mqflags |= SR_MQFLAG_DC;
		} else if (!strcmp(tokens[2], "OL") || !strcmp(tokens[2], "OL_MINUS")) {
			*analog->data = NAN;
		} else
			analog->mq = -1;
	} if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
		analog->mq = SR_MQ_FREQUENCY;
		analog->unit = SR_UNIT_HERTZ;
	} if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
		analog->mq = SR_MQ_DUTY_CYCLE;
		analog->unit = SR_UNIT_PERCENTAGE;
	} if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
		analog->mq = SR_MQ_PULSE_WIDTH;
		analog->unit = SR_UNIT_SECOND;
	} if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
		analog->mq = SR_MQ_CONDUCTANCE;
		analog->unit = SR_UNIT_SIEMENS;
	}

	if (analog->mq == -1) {
		/* Not a valid measurement. */
		g_free(analog->data);
		g_free(analog);
		analog = NULL;
	}

	return analog;
}

static void handle_line(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog *analog;
	char **tokens;

	devc = sdi->priv;
	sr_spew("fluke-dmm: received line '%s' (%d)", devc->buf, devc->buflen);

	if (devc->buflen == 1) {
		if (devc->buf[0] != '0') {
			/* Not just a CMD_ACK from the query command. */
			sr_dbg("fluke-dmm: got CMD_ACK '%c'", devc->buf[0]);
			devc->expect_response = FALSE;
		}
		devc->buflen = 0;
		return;
	}

	analog = NULL;
	tokens = g_strsplit(devc->buf, ",", 0);
	if (tokens[0] && tokens[1]) {
		if (devc->profile->model == FLUKE_187) {
			devc->expect_response = FALSE;
			analog = handle_qm_v1(sdi, tokens);
		} else if (devc->profile->model == FLUKE_287) {
			devc->expect_response = FALSE;
			analog = handle_qm_v2(sdi, tokens);
		}
	}
	g_strfreev(tokens);
	devc->buflen = 0;

	if (analog) {
		/* Got a measurement. */
		packet.type = SR_DF_ANALOG;
		packet.payload = analog;
		sr_session_send(devc->cb_data, &packet);
		devc->num_samples++;
		g_free(analog->data);
		g_free(analog);
	}

}

SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
{
	const struct sr_dev_inst *sdi;
	struct dev_context *devc;
	int len;
	int64_t now, elapsed;

	if (!(sdi = cb_data))
		return TRUE;

	if (!(devc = sdi->priv))
		return TRUE;

	if (revents == G_IO_IN) {
		/* Serial data arrived. */
		while(FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
			len = serial_read(fd, devc->buf + devc->buflen, 1);
			if (len < 1)
				break;
			devc->buflen++;
			*(devc->buf + devc->buflen) = '\0';
			if (*(devc->buf + devc->buflen - 1) == '\r') {
				*(devc->buf + --devc->buflen) = '\0';
				handle_line(sdi);
				break;
			}
		}
	}

	if (devc->num_samples >= devc->limit_samples) {
		sdi->driver->dev_acquisition_stop(sdi, cb_data);
		return TRUE;
	}

	now = g_get_monotonic_time() / 1000;
	elapsed = now - devc->cmd_sent_at;
	/* Send query command at poll_period interval, or after 1 second
	 * has elapsed. This will make it recover from any out-of-sync
	 * or temporary disconnect issues. */
	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
			|| elapsed > 1000) {
		sr_spew("fluke-dmm: sending QM");
		if (serial_write(devc->serial->fd, "QM\r", 3) == -1)
			sr_err("fluke-dmm: unable to send QM: %s", strerror(errno));
		devc->cmd_sent_at = now;
		devc->expect_response = TRUE;
	}

	return TRUE;
}
Commit	Line	Data
d38d2ef0 BV	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	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	#include <glib.h>
	21	#include "libsigrok.h"
	22	#include "libsigrok-internal.h"
	23	#include "config.h"
	24	#include "fluke-dmm.h"
	25	#include <stdlib.h>
	26	#include <math.h>
	27	#include <string.h>
	28	#include <errno.h>
	29
	30
fe31f8b9 BV	31	static struct sr_datafeed_analog handle_qm_v1(const struct sr_dev_inst sdi,
	32	char **tokens)
	33	{
	34	struct sr_datafeed_analog *analog;
	35	float fvalue;
	36	char e, u;
	37	gboolean is_oor;
	38
	39	(void)sdi;
	40	if (strcmp(tokens[0], "QM"))
	41	return NULL;
	42
	43	if ((e = strstr(tokens[1], "Out of range"))) {
	44	is_oor = TRUE;
	45	fvalue = -1;
	46	} else {
	47	is_oor = FALSE;
	48	fvalue = strtof(tokens[1], &e);
	49	if (fvalue == 0.0 && e == tokens[1]) {
	50	/* Happens all the time, when switching modes. */
	51	sr_dbg("fluke-dmm: invalid float");
	52	return NULL;
	53	}
	54	}
	55	while(e && e == ' ')
	56	e++;
	57
	58	analog = g_try_malloc0(sizeof(struct sr_datafeed_analog));
	59	analog->num_samples = 1;
	60	analog->data = g_try_malloc(sizeof(float));
	61	if (is_oor)
	62	*analog->data = NAN;
	63	else
	64	*analog->data = fvalue;
	65	analog->mq = -1;
	66
	67	if ((u = strstr(e, "V DC")) \|\| (u = strstr(e, "V AC"))) {
	68	analog->mq = SR_MQ_VOLTAGE;
	69	analog->unit = SR_UNIT_VOLT;
	70	if (!is_oor && e[0] == 'm')
	71	*analog->data /= 1000;
	72	/* This catches "V AC", "V DC" and "V AC+DC". */
	73	if (strstr(u, "AC"))
	74	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	75	if (strstr(u, "DC"))
	76	analog->mqflags \|= SR_MQFLAG_DC;
	77	} else if ((u = strstr(e, "dBV")) \|\| (u = strstr(e, "dBm"))) {
	78	analog->mq = SR_MQ_VOLTAGE;
	79	if (u[2] == 'm')
	80	analog->unit = SR_UNIT_DECIBEL_MW;
	81	else
	82	analog->unit = SR_UNIT_DECIBEL_VOLT;
	83	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	84	} else if ((u = strstr(e, "Ohms"))) {
	85	analog->mq = SR_MQ_RESISTANCE;
	86	analog->unit = SR_UNIT_OHM;
	87	if (is_oor)
	88	*analog->data = INFINITY;
	89	else if (e[0] == 'k')
	90	analog->data = 1000;
	91	else if (e[0] == 'M')
	92	analog->data = 1000000;
	93	} else if (!strcmp(e, "nS")) {
	94	analog->mq = SR_MQ_CONDUCTANCE;
95	analog->unit = SR_UNIT_SIEMENS;
96	*analog->data /= 1e+9;
97	} else if ((u = strstr(e, "Farads"))) {
98	analog->mq = SR_MQ_CAPACITANCE;
99	analog->unit = SR_UNIT_FARAD;
100	if (!is_oor) {
101	if (e[0] == 'm')
102	*analog->data /= 1e+3;
103	else if (e[0] == 'u')
104	*analog->data /= 1e+6;
105	else if (e[0] == 'n')
106	*analog->data /= 1e+9;
107	}
108	} else if ((u = strstr(e, "Deg C")) \|\| (u = strstr(e, "Deg F"))) {
109	analog->mq = SR_MQ_TEMPERATURE;
110	if (u[4] == 'C')
111	analog->unit = SR_UNIT_CELSIUS;
112	else
113	analog->unit = SR_UNIT_FAHRENHEIT;
114	} else if ((u = strstr(e, "A AC")) \|\| (u = strstr(e, "A DC"))) {
115	analog->mq = SR_MQ_CURRENT;
116	analog->unit = SR_UNIT_AMPERE;
117	/* This catches "A AC", "A DC" and "A AC+DC". */
118	if (strstr(u, "AC"))
119	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
120	if (strstr(u, "DC"))
121	analog->mqflags \|= SR_MQFLAG_DC;
122	if (!is_oor) {
123	if (e[0] == 'm')
124	*analog->data /= 1e+3;
125	else if (e[0] == 'u')
126	*analog->data /= 1e+6;
127	}
128	} else if ((u = strstr(e, "Hz"))) {
129	analog->mq = SR_MQ_FREQUENCY;
130	analog->unit = SR_UNIT_HERTZ;
131	if (e[0] == 'k')
132	analog->data = 1e+3;
133	} else if (!strcmp(e, "%")) {
134	analog->mq = SR_MQ_DUTY_CYCLE;
135	analog->unit = SR_UNIT_PERCENTAGE;
136	} else if ((u = strstr(e, "ms"))) {
137	analog->mq = SR_MQ_PULSE_WIDTH;
138	analog->unit = SR_UNIT_SECOND;
139	*analog->data /= 1e+3;
140	}
141
142	if (analog->mq == -1) {
143	/* Not a valid measurement. */
144	g_free(analog->data);
145	g_free(analog);
146	analog = NULL;
147	}
148
149	return analog;
150	}
151
d38d2ef0 BV	152	static struct sr_datafeed_analog handle_qm_v2(const struct sr_dev_inst sdi,
	153	char **tokens)
	154	{
	155	struct sr_datafeed_analog *analog;
	156	float fvalue;
	157	char *eptr;
	158
	159	(void)sdi;
	160	fvalue = strtof(tokens[0], &eptr);
	161	if (fvalue == 0.0 && eptr == tokens[0]) {
	162	sr_err("fluke-dmm: invalid float");
	163	return NULL;
	164	}
	165
	166	analog = g_try_malloc0(sizeof(struct sr_datafeed_analog));
	167	analog->num_samples = 1;
	168	analog->data = g_try_malloc(sizeof(float));
	169	*analog->data = fvalue;
	170	analog->mq = -1;
	171
	172	if (!strcmp(tokens[1], "VAC") \|\| !strcmp(tokens[1], "VDC")) {
	173	analog->mq = SR_MQ_VOLTAGE;
	174	analog->unit = SR_UNIT_VOLT;
	175	if (!strcmp(tokens[2], "NORMAL")) {
	176	if (tokens[1][1] == 'A') {
	177	analog->mqflags \|= SR_MQFLAG_AC;
	178	analog->mqflags \|= SR_MQFLAG_RMS;
	179	} else
	180	analog->mqflags \|= SR_MQFLAG_DC;
	181	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	182	*analog->data = NAN;
	183	} else
	184	analog->mq = -1;
	185	} if (!strcmp(tokens[1], "CEL") \|\| !strcmp(tokens[1], "FAR")) {
	186	if (!strcmp(tokens[2], "NORMAL")) {
	187	analog->mq = SR_MQ_TEMPERATURE;
	188	if (tokens[1][0] == 'C')
fe31f8b9	189	analog->unit = SR_UNIT_CELSIUS;
d38d2ef0 BV	190	else
	191	analog->unit = SR_UNIT_FAHRENHEIT;
	192	}
	193	} if (!strcmp(tokens[1], "OHM")) {
	194	if (!strcmp(tokens[3], "NONE")) {
	195	analog->mq = SR_MQ_RESISTANCE;
	196	analog->unit = SR_UNIT_OHM;
	197	if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	198	*analog->data = INFINITY;
	199	} else if (strcmp(tokens[2], "NORMAL"))
	200	analog->mq = -1;
	201	} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
	202	analog->mq = SR_MQ_CONTINUITY;
	203	analog->unit = SR_UNIT_BOOLEAN;
	204	*analog->data = 0.0;
	205	} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
	206	analog->mq = SR_MQ_CONTINUITY;
	207	analog->unit = SR_UNIT_BOOLEAN;
	208	*analog->data = 1.0;
	209	}
	210	} if (!strcmp(tokens[1], "F")
	211	&& !strcmp(tokens[2], "NORMAL")
	212	&& !strcmp(tokens[3], "NONE")) {
	213	analog->mq = SR_MQ_CAPACITANCE;
	214	analog->unit = SR_UNIT_FARAD;
	215	} else if (!strcmp(tokens[1], "AAC") \|\| !strcmp(tokens[1], "ADC")) {
	216	analog->mq = SR_MQ_CURRENT;
	217	analog->unit = SR_UNIT_AMPERE;
d38d2ef0 BV	218	if (!strcmp(tokens[2], "NORMAL")) {
	219	if (tokens[1][1] == 'A') {
	220	analog->mqflags \|= SR_MQFLAG_AC;
	221	analog->mqflags \|= SR_MQFLAG_RMS;
	222	} else
	223	analog->mqflags \|= SR_MQFLAG_DC;
	224	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	225	*analog->data = NAN;
	226	} else
	227	analog->mq = -1;
	228	} if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
	229	analog->mq = SR_MQ_FREQUENCY;
	230	analog->unit = SR_UNIT_HERTZ;
	231	} if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
	232	analog->mq = SR_MQ_DUTY_CYCLE;
	233	analog->unit = SR_UNIT_PERCENTAGE;
	234	} if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
	235	analog->mq = SR_MQ_PULSE_WIDTH;
	236	analog->unit = SR_UNIT_SECOND;
	237	} if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
	238	analog->mq = SR_MQ_CONDUCTANCE;
	239	analog->unit = SR_UNIT_SIEMENS;
	240	}
	241
d38d2ef0 BV	242	if (analog->mq == -1) {
	243	/* Not a valid measurement. */
	244	g_free(analog->data);
	245	g_free(analog);
	246	analog = NULL;
	247	}
	248
	249	return analog;
	250	}
	251
	252	static void handle_line(const struct sr_dev_inst *sdi)
	253	{
	254	struct dev_context *devc;
	255	struct sr_datafeed_packet packet;
	256	struct sr_datafeed_analog *analog;
	257	char **tokens;
	258
	259	devc = sdi->priv;
	260	sr_spew("fluke-dmm: received line '%s' (%d)", devc->buf, devc->buflen);
	261
	262	if (devc->buflen == 1) {
	263	if (devc->buf[0] != '0') {
	264	/* Not just a CMD_ACK from the query command. */
	265	sr_dbg("fluke-dmm: got CMD_ACK '%c'", devc->buf[0]);
	266	devc->expect_response = FALSE;
	267	}
	268	devc->buflen = 0;
	269	return;
	270	}
	271
	272	analog = NULL;
	273	tokens = g_strsplit(devc->buf, ",", 0);
fe31f8b9 BV	274	if (tokens[0] && tokens[1]) {
	275	if (devc->profile->model == FLUKE_187) {
	276	devc->expect_response = FALSE;
	277	analog = handle_qm_v1(sdi, tokens);
	278	} else if (devc->profile->model == FLUKE_287) {
d38d2ef0	279	devc->expect_response = FALSE;
fe31f8b9	280	analog = handle_qm_v2(sdi, tokens);
d38d2ef0	281	}
d38d2ef0 BV	282	}
	283	g_strfreev(tokens);
	284	devc->buflen = 0;
	285
	286	if (analog) {
	287	/* Got a measurement. */
d38d2ef0 BV	288	packet.type = SR_DF_ANALOG;
	289	packet.payload = analog;
	290	sr_session_send(devc->cb_data, &packet);
	291	devc->num_samples++;
	292	g_free(analog->data);
	293	g_free(analog);
	294	}
	295
	296	}
	297
	298	SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
	299	{
	300	const struct sr_dev_inst *sdi;
	301	struct dev_context *devc;
	302	int len;
	303	int64_t now, elapsed;
	304
	305	if (!(sdi = cb_data))
	306	return TRUE;
	307
	308	if (!(devc = sdi->priv))
	309	return TRUE;
	310
	311	if (revents == G_IO_IN) {
	312	/* Serial data arrived. */
	313	while(FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
	314	len = serial_read(fd, devc->buf + devc->buflen, 1);
	315	if (len < 1)
	316	break;
	317	devc->buflen++;
	318	*(devc->buf + devc->buflen) = '\0';
	319	if (*(devc->buf + devc->buflen - 1) == '\r') {
	320	*(devc->buf + --devc->buflen) = '\0';
	321	handle_line(sdi);
	322	break;
	323	}
	324	}
	325	}
	326
	327	if (devc->num_samples >= devc->limit_samples) {
	328	sdi->driver->dev_acquisition_stop(sdi, cb_data);
	329	return TRUE;
	330	}
	331
	332	now = g_get_monotonic_time() / 1000;
	333	elapsed = now - devc->cmd_sent_at;
	334	/* Send query command at poll_period interval, or after 1 second
	335	* has elapsed. This will make it recover from any out-of-sync
	336	* or temporary disconnect issues. */
	337	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
	338	\|\| elapsed > 1000) {
	339	sr_spew("fluke-dmm: sending QM");
	340	if (serial_write(devc->serial->fd, "QM\r", 3) == -1)
	341	sr_err("fluke-dmm: unable to send QM: %s", strerror(errno));
	342	devc->cmd_sent_at = now;
	343	devc->expect_response = TRUE;
	344	}
	345
	346	return TRUE;
	347	}
	348
	349