[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 "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;
	} else if (!strcmp(tokens[1], "dBV") || !strcmp(tokens[1], "dBm")) {
		analog->mq = SR_MQ_VOLTAGE;
		if (tokens[1][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 (!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;
		}
	} else 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;
		}
	} else 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;
	} else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
		analog->mq = SR_MQ_DUTY_CYCLE;
		analog->unit = SR_UNIT_PERCENTAGE;
	} else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
		analog->mq = SR_MQ_PULSE_WIDTH;
		analog->unit = SR_UNIT_SECOND;
	} else 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"
d38d2ef0 BV	23	#include "fluke-dmm.h"
	24	#include <stdlib.h>
	25	#include <math.h>
	26	#include <string.h>
	27	#include <errno.h>
	28
	29
fe31f8b9 BV	30	static struct sr_datafeed_analog handle_qm_v1(const struct sr_dev_inst sdi,
	31	char **tokens)
	32	{
	33	struct sr_datafeed_analog *analog;
	34	float fvalue;
	35	char e, u;
	36	gboolean is_oor;
	37
	38	(void)sdi;
	39	if (strcmp(tokens[0], "QM"))
	40	return NULL;
	41
	42	if ((e = strstr(tokens[1], "Out of range"))) {
	43	is_oor = TRUE;
	44	fvalue = -1;
	45	} else {
	46	is_oor = FALSE;
	47	fvalue = strtof(tokens[1], &e);
	48	if (fvalue == 0.0 && e == tokens[1]) {
	49	/* Happens all the time, when switching modes. */
	50	sr_dbg("fluke-dmm: invalid float");
	51	return NULL;
	52	}
	53	}
	54	while(e && e == ' ')
	55	e++;
	56
	57	analog = g_try_malloc0(sizeof(struct sr_datafeed_analog));
	58	analog->num_samples = 1;
	59	analog->data = g_try_malloc(sizeof(float));
	60	if (is_oor)
	61	*analog->data = NAN;
	62	else
	63	*analog->data = fvalue;
	64	analog->mq = -1;
	65
	66	if ((u = strstr(e, "V DC")) \|\| (u = strstr(e, "V AC"))) {
	67	analog->mq = SR_MQ_VOLTAGE;
	68	analog->unit = SR_UNIT_VOLT;
	69	if (!is_oor && e[0] == 'm')
	70	*analog->data /= 1000;
	71	/* This catches "V AC", "V DC" and "V AC+DC". */
	72	if (strstr(u, "AC"))
	73	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	74	if (strstr(u, "DC"))
	75	analog->mqflags \|= SR_MQFLAG_DC;
	76	} else if ((u = strstr(e, "dBV")) \|\| (u = strstr(e, "dBm"))) {
	77	analog->mq = SR_MQ_VOLTAGE;
	78	if (u[2] == 'm')
	79	analog->unit = SR_UNIT_DECIBEL_MW;
	80	else
	81	analog->unit = SR_UNIT_DECIBEL_VOLT;
	82	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	83	} else if ((u = strstr(e, "Ohms"))) {
	84	analog->mq = SR_MQ_RESISTANCE;
	85	analog->unit = SR_UNIT_OHM;
	86	if (is_oor)
	87	*analog->data = INFINITY;
	88	else if (e[0] == 'k')
	89	analog->data = 1000;
	90	else if (e[0] == 'M')
	91	analog->data = 1000000;
	92	} else if (!strcmp(e, "nS")) {
	93	analog->mq = SR_MQ_CONDUCTANCE;
94	analog->unit = SR_UNIT_SIEMENS;
95	*analog->data /= 1e+9;
96	} else if ((u = strstr(e, "Farads"))) {
97	analog->mq = SR_MQ_CAPACITANCE;
98	analog->unit = SR_UNIT_FARAD;
99	if (!is_oor) {
100	if (e[0] == 'm')
101	*analog->data /= 1e+3;
102	else if (e[0] == 'u')
103	*analog->data /= 1e+6;
104	else if (e[0] == 'n')
105	*analog->data /= 1e+9;
106	}
107	} else if ((u = strstr(e, "Deg C")) \|\| (u = strstr(e, "Deg F"))) {
108	analog->mq = SR_MQ_TEMPERATURE;
109	if (u[4] == 'C')
110	analog->unit = SR_UNIT_CELSIUS;
111	else
112	analog->unit = SR_UNIT_FAHRENHEIT;
113	} else if ((u = strstr(e, "A AC")) \|\| (u = strstr(e, "A DC"))) {
114	analog->mq = SR_MQ_CURRENT;
115	analog->unit = SR_UNIT_AMPERE;
116	/* This catches "A AC", "A DC" and "A AC+DC". */
117	if (strstr(u, "AC"))
118	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
119	if (strstr(u, "DC"))
120	analog->mqflags \|= SR_MQFLAG_DC;
121	if (!is_oor) {
122	if (e[0] == 'm')
123	*analog->data /= 1e+3;
124	else if (e[0] == 'u')
125	*analog->data /= 1e+6;
126	}
127	} else if ((u = strstr(e, "Hz"))) {
128	analog->mq = SR_MQ_FREQUENCY;
129	analog->unit = SR_UNIT_HERTZ;
130	if (e[0] == 'k')
131	analog->data = 1e+3;
132	} else if (!strcmp(e, "%")) {
133	analog->mq = SR_MQ_DUTY_CYCLE;
134	analog->unit = SR_UNIT_PERCENTAGE;
135	} else if ((u = strstr(e, "ms"))) {
136	analog->mq = SR_MQ_PULSE_WIDTH;
137	analog->unit = SR_UNIT_SECOND;
138	*analog->data /= 1e+3;
139	}
140
141	if (analog->mq == -1) {
142	/* Not a valid measurement. */
143	g_free(analog->data);
144	g_free(analog);
145	analog = NULL;
146	}
147
148	return analog;
149	}
150
d38d2ef0 BV	151	static struct sr_datafeed_analog handle_qm_v2(const struct sr_dev_inst sdi,
	152	char **tokens)
	153	{
	154	struct sr_datafeed_analog *analog;
	155	float fvalue;
	156	char *eptr;
	157
	158	(void)sdi;
	159	fvalue = strtof(tokens[0], &eptr);
	160	if (fvalue == 0.0 && eptr == tokens[0]) {
	161	sr_err("fluke-dmm: invalid float");
	162	return NULL;
	163	}
	164
	165	analog = g_try_malloc0(sizeof(struct sr_datafeed_analog));
	166	analog->num_samples = 1;
	167	analog->data = g_try_malloc(sizeof(float));
	168	*analog->data = fvalue;
	169	analog->mq = -1;
	170
	171	if (!strcmp(tokens[1], "VAC") \|\| !strcmp(tokens[1], "VDC")) {
	172	analog->mq = SR_MQ_VOLTAGE;
	173	analog->unit = SR_UNIT_VOLT;
	174	if (!strcmp(tokens[2], "NORMAL")) {
	175	if (tokens[1][1] == 'A') {
	176	analog->mqflags \|= SR_MQFLAG_AC;
	177	analog->mqflags \|= SR_MQFLAG_RMS;
	178	} else
	179	analog->mqflags \|= SR_MQFLAG_DC;
	180	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	181	*analog->data = NAN;
	182	} else
	183	analog->mq = -1;
a28dac0a	184	} else if (!strcmp(tokens[1], "dBV") \|\| !strcmp(tokens[1], "dBm")) {
2c04dede BV	185	analog->mq = SR_MQ_VOLTAGE;
	186	if (tokens[1][2] == 'm')
	187	analog->unit = SR_UNIT_DECIBEL_MW;
	188	else
	189	analog->unit = SR_UNIT_DECIBEL_VOLT;
	190	analog->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
a28dac0a	191	} else if (!strcmp(tokens[1], "CEL") \|\| !strcmp(tokens[1], "FAR")) {
d38d2ef0 BV	192	if (!strcmp(tokens[2], "NORMAL")) {
	193	analog->mq = SR_MQ_TEMPERATURE;
	194	if (tokens[1][0] == 'C')
fe31f8b9	195	analog->unit = SR_UNIT_CELSIUS;
d38d2ef0 BV	196	else
	197	analog->unit = SR_UNIT_FAHRENHEIT;
	198	}
a28dac0a	199	} else if (!strcmp(tokens[1], "OHM")) {
d38d2ef0 BV	200	if (!strcmp(tokens[3], "NONE")) {
	201	analog->mq = SR_MQ_RESISTANCE;
	202	analog->unit = SR_UNIT_OHM;
	203	if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	204	*analog->data = INFINITY;
	205	} else if (strcmp(tokens[2], "NORMAL"))
	206	analog->mq = -1;
	207	} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
	208	analog->mq = SR_MQ_CONTINUITY;
	209	analog->unit = SR_UNIT_BOOLEAN;
	210	*analog->data = 0.0;
	211	} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
	212	analog->mq = SR_MQ_CONTINUITY;
	213	analog->unit = SR_UNIT_BOOLEAN;
	214	*analog->data = 1.0;
	215	}
a28dac0a	216	} else if (!strcmp(tokens[1], "F")
d38d2ef0 BV	217	&& !strcmp(tokens[2], "NORMAL")
	218	&& !strcmp(tokens[3], "NONE")) {
	219	analog->mq = SR_MQ_CAPACITANCE;
	220	analog->unit = SR_UNIT_FARAD;
	221	} else if (!strcmp(tokens[1], "AAC") \|\| !strcmp(tokens[1], "ADC")) {
	222	analog->mq = SR_MQ_CURRENT;
	223	analog->unit = SR_UNIT_AMPERE;
d38d2ef0 BV	224	if (!strcmp(tokens[2], "NORMAL")) {
	225	if (tokens[1][1] == 'A') {
	226	analog->mqflags \|= SR_MQFLAG_AC;
	227	analog->mqflags \|= SR_MQFLAG_RMS;
	228	} else
	229	analog->mqflags \|= SR_MQFLAG_DC;
	230	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	231	*analog->data = NAN;
	232	} else
	233	analog->mq = -1;
	234	} if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
	235	analog->mq = SR_MQ_FREQUENCY;
	236	analog->unit = SR_UNIT_HERTZ;
a28dac0a	237	} else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
d38d2ef0 BV	238	analog->mq = SR_MQ_DUTY_CYCLE;
d38d2ef0 BV	239	analog->unit = SR_UNIT_PERCENTAGE;
a28dac0a	240	} else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
d38d2ef0 BV	241	analog->mq = SR_MQ_PULSE_WIDTH;
d38d2ef0 BV	242	analog->unit = SR_UNIT_SECOND;
a28dac0a	243	} else if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
d38d2ef0 BV	244	analog->mq = SR_MQ_CONDUCTANCE;
	245	analog->unit = SR_UNIT_SIEMENS;
	246	}
	247
d38d2ef0 BV	248	if (analog->mq == -1) {
	249	/* Not a valid measurement. */
	250	g_free(analog->data);
	251	g_free(analog);
	252	analog = NULL;
	253	}
	254
	255	return analog;
	256	}
	257
	258	static void handle_line(const struct sr_dev_inst *sdi)
	259	{
	260	struct dev_context *devc;
	261	struct sr_datafeed_packet packet;
	262	struct sr_datafeed_analog *analog;
	263	char **tokens;
	264
	265	devc = sdi->priv;
	266	sr_spew("fluke-dmm: received line '%s' (%d)", devc->buf, devc->buflen);
	267
	268	if (devc->buflen == 1) {
	269	if (devc->buf[0] != '0') {
	270	/* Not just a CMD_ACK from the query command. */
	271	sr_dbg("fluke-dmm: got CMD_ACK '%c'", devc->buf[0]);
	272	devc->expect_response = FALSE;
	273	}
	274	devc->buflen = 0;
	275	return;
	276	}
	277
	278	analog = NULL;
	279	tokens = g_strsplit(devc->buf, ",", 0);
fe31f8b9 BV	280	if (tokens[0] && tokens[1]) {
	281	if (devc->profile->model == FLUKE_187) {
	282	devc->expect_response = FALSE;
	283	analog = handle_qm_v1(sdi, tokens);
	284	} else if (devc->profile->model == FLUKE_287) {
d38d2ef0	285	devc->expect_response = FALSE;
fe31f8b9	286	analog = handle_qm_v2(sdi, tokens);
d38d2ef0	287	}
d38d2ef0 BV	288	}
	289	g_strfreev(tokens);
	290	devc->buflen = 0;
	291
	292	if (analog) {
	293	/* Got a measurement. */
d38d2ef0 BV	294	packet.type = SR_DF_ANALOG;
	295	packet.payload = analog;
	296	sr_session_send(devc->cb_data, &packet);
	297	devc->num_samples++;
	298	g_free(analog->data);
	299	g_free(analog);
	300	}
	301
	302	}
	303
	304	SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
	305	{
	306	const struct sr_dev_inst *sdi;
	307	struct dev_context *devc;
	308	int len;
	309	int64_t now, elapsed;
	310
	311	if (!(sdi = cb_data))
	312	return TRUE;
	313
	314	if (!(devc = sdi->priv))
	315	return TRUE;
	316
	317	if (revents == G_IO_IN) {
	318	/* Serial data arrived. */
	319	while(FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
	320	len = serial_read(fd, devc->buf + devc->buflen, 1);
	321	if (len < 1)
	322	break;
	323	devc->buflen++;
	324	*(devc->buf + devc->buflen) = '\0';
	325	if (*(devc->buf + devc->buflen - 1) == '\r') {
	326	*(devc->buf + --devc->buflen) = '\0';
	327	handle_line(sdi);
	328	break;
	329	}
	330	}
	331	}
	332
	333	if (devc->num_samples >= devc->limit_samples) {
	334	sdi->driver->dev_acquisition_stop(sdi, cb_data);
	335	return TRUE;
	336	}
	337
	338	now = g_get_monotonic_time() / 1000;
	339	elapsed = now - devc->cmd_sent_at;
	340	/* Send query command at poll_period interval, or after 1 second
	341	* has elapsed. This will make it recover from any out-of-sync
	342	* or temporary disconnect issues. */
	343	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
	344	\|\| elapsed > 1000) {
	345	sr_spew("fluke-dmm: sending QM");
	346	if (serial_write(devc->serial->fd, "QM\r", 3) == -1)
	347	sr_err("fluke-dmm: unable to send QM: %s", strerror(errno));
	348	devc->cmd_sent_at = now;
	349	devc->expect_response = TRUE;
	350	}
	351
	352	return TRUE;
	353	}
	354
	355