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

/*
 * This file is part of the libsigrok 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 <config.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <glib.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#include "fluke-dmm.h"

static struct sr_datafeed_analog *handle_qm_18x(const struct sr_dev_inst *sdi,
		char **tokens)
{
	struct sr_datafeed_analog *analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;
	float fvalue;
	char *e, *u;
	gboolean is_oor;

	if (strcmp(tokens[0], "QM") || !tokens[1])
		return NULL;

	if ((e = strstr(tokens[1], "Out of range"))) {
		is_oor = TRUE;
		fvalue = -1;
		while (*e && *e != '.')
			e++;
	} else {
		is_oor = FALSE;
		/* Delimit the float, since sr_atof_ascii() wants only
		 * a valid float here. */
		e = tokens[1];
		while (*e && *e != ' ')
			e++;
		*e++ = '\0';
		if (sr_atof_ascii(tokens[1], &fvalue) != SR_OK || fvalue == 0.0) {
			/* Happens all the time, when switching modes. */
			sr_dbg("Invalid float.");
			return NULL;
		}
	}
	while (*e && *e == ' ')
		e++;

	analog = g_malloc0(sizeof(struct sr_datafeed_analog));
	sr_analog_init(analog, &encoding, &meaning, &spec, 0);
	analog->data = g_malloc(sizeof(float));
	analog->meaning->channels = sdi->channels;
	analog->num_samples = 1;
	if (is_oor)
		*((float *)analog->data) = NAN;
	else
		*((float *)analog->data) = fvalue;
	analog->meaning->mq = 0;

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

	if (analog->meaning->mq == 0) {
		/* Not a valid measurement. */
		g_free(analog->data);
		g_free(analog);
		analog = NULL;
	}

	return analog;
}

static struct sr_datafeed_analog *handle_qm_28x(const struct sr_dev_inst *sdi,
		char **tokens)
{
	struct sr_datafeed_analog *analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;
	float fvalue;

	if (!tokens[1])
		return NULL;

	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK || fvalue == 0.0) {
		sr_err("Invalid float '%s'.", tokens[0]);
		return NULL;
	}

	analog = g_malloc0(sizeof(struct sr_datafeed_analog));
	sr_analog_init(analog, &encoding, &meaning, &spec, 0);
	analog->data = g_malloc(sizeof(float));
	analog->meaning->channels = sdi->channels;
	analog->num_samples = 1;
	*((float *)analog->data) = fvalue;
	analog->meaning->mq = 0;

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

	if (analog->meaning->mq == 0) {
		/* Not a valid measurement. */
		g_free(analog->data);
		g_free(analog);
		analog = NULL;
	}

	return analog;
}

static void handle_qm_19x_meta(const struct sr_dev_inst *sdi, char **tokens)
{
	struct dev_context *devc;
	int meas_type, meas_unit, meas_char, i;

	/* Make sure we have 7 valid tokens. */
	for (i = 0; tokens[i] && i < 7; i++);
	if (i != 7)
		return;

	if (strcmp(tokens[1], "1"))
		/* Invalid measurement. */
		return;

	if (strcmp(tokens[2], "3"))
		/* Only interested in input from the meter mode source. */
		return;

	devc = sdi->priv;

	/* Measurement type 11 == absolute, 19 = relative */
	meas_type = strtol(tokens[0], NULL, 10);
	if (meas_type != 11 && meas_type != 19)
		/* Device is in some mode we don't support. */
		return;

	/* We might get metadata for absolute and relative mode (if the device
	 * is in relative mode). In that case, relative takes precedence. */
	if (meas_type == 11 && devc->meas_type == 19)
		return;

	meas_unit = strtol(tokens[3], NULL, 10);
	if (meas_unit == 0)
		/* Device is turned off. Really. */
		return;
	meas_char = strtol(tokens[4], NULL, 10);

	devc->mq = devc->unit = devc->mqflags = 0;
	switch (meas_unit) {
	case 1:
		devc->mq = SR_MQ_VOLTAGE;
		devc->unit = SR_UNIT_VOLT;
		if (meas_char == 1)
			devc->mqflags |= SR_MQFLAG_DC;
		else if (meas_char == 2)
			devc->mqflags |= SR_MQFLAG_AC;
		else if (meas_char == 3)
			devc->mqflags |= SR_MQFLAG_DC | SR_MQFLAG_AC;
		else if (meas_char == 15)
			devc->mqflags |= SR_MQFLAG_DIODE;
		break;
	case 2:
		devc->mq = SR_MQ_CURRENT;
		devc->unit = SR_UNIT_AMPERE;
		if (meas_char == 1)
			devc->mqflags |= SR_MQFLAG_DC;
		else if (meas_char == 2)
			devc->mqflags |= SR_MQFLAG_AC;
		else if (meas_char == 3)
			devc->mqflags |= SR_MQFLAG_DC | SR_MQFLAG_AC;
		break;
	case 3:
		if (meas_char == 1) {
			devc->mq = SR_MQ_RESISTANCE;
			devc->unit = SR_UNIT_OHM;
		} else if (meas_char == 16) {
			devc->mq = SR_MQ_CONTINUITY;
			devc->unit = SR_UNIT_BOOLEAN;
		}
		break;
	case 12:
		devc->mq = SR_MQ_TEMPERATURE;
		devc->unit = SR_UNIT_CELSIUS;
		break;
	case 13:
		devc->mq = SR_MQ_TEMPERATURE;
		devc->unit = SR_UNIT_FAHRENHEIT;
		break;
	default:
		sr_dbg("unknown unit: %d", meas_unit);
	}
	if (devc->mq == 0 && devc->unit == 0)
		return;

	/* If we got here, we know how to interpret the measurement. */
	devc->meas_type = meas_type;
	if (meas_type == 11)
		/* Absolute meter reading. */
		devc->is_relative = FALSE;
	else if (!strcmp(tokens[0], "19"))
		/* Relative meter reading. */
		devc->is_relative = TRUE;

}

static void handle_qm_19x_data(const struct sr_dev_inst *sdi, char **tokens)
{
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;
	float fvalue;

	if (!strcmp(tokens[0], "9.9E+37")) {
		/* An invalid measurement shows up on the display as "OL", but
		 * comes through like this. Since comparing 38-digit floats
		 * is rather problematic, we'll cut through this here. */
		fvalue = NAN;
	} else {
		if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK || fvalue == 0.0) {
			sr_err("Invalid float '%s'.", tokens[0]);
			return;
		}
	}

	devc = sdi->priv;
	if (devc->mq == 0 || devc->unit == 0)
		/* Don't have valid metadata yet. */
		return;

	if (devc->mq == SR_MQ_RESISTANCE && isnan(fvalue))
		fvalue = INFINITY;
	else if (devc->mq == SR_MQ_CONTINUITY) {
		if (isnan(fvalue))
			fvalue = 0.0;
		else
			fvalue = 1.0;
	}

	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	analog.meaning->channels = sdi->channels;
	analog.num_samples = 1;
	analog.data = &fvalue;
	analog.meaning->mq = devc->mq;
	analog.meaning->unit = devc->unit;
	analog.meaning->mqflags = 0;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	sr_session_send(sdi, &packet);

	sr_sw_limits_update_samples_read(&devc->limits, 1);
}

static void handle_line(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog *analog;
	int num_tokens, n, i;
	char cmd[16], **tokens;

	devc = sdi->priv;
	serial = sdi->conn;
	sr_spew("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("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]) {
		if (devc->profile->model == FLUKE_187 || devc->profile->model == FLUKE_189) {
			devc->expect_response = FALSE;
			analog = handle_qm_18x(sdi, tokens);
		} else if (devc->profile->model == FLUKE_287 || devc->profile->model == FLUKE_289) {
			devc->expect_response = FALSE;
			analog = handle_qm_28x(sdi, tokens);
		} else if (devc->profile->model == FLUKE_190) {
			devc->expect_response = FALSE;
			for (num_tokens = 0; tokens[num_tokens]; num_tokens++);
			if (num_tokens >= 7) {
				/* Response to QM: this is a comma-separated list of
				 * fields with metadata about the measurement. This
				 * format can return multiple sets of metadata,
				 * split into sets of 7 tokens each. */
				devc->meas_type = 0;
				for (i = 0; i < num_tokens; i += 7)
					handle_qm_19x_meta(sdi, tokens + i);
				if (devc->meas_type) {
					/* Slip the request in now, before the main
					 * timer loop asks for metadata again. */
					n = sprintf(cmd, "QM %d\r", devc->meas_type);
					if (serial_write_blocking(serial, cmd, n, SERIAL_WRITE_TIMEOUT_MS) < 0)
						sr_err("Unable to send QM (measurement).");
				}
			} else {
				/* Response to QM <n> measurement request. */
				handle_qm_19x_data(sdi, tokens);
			}
		}
	}
	g_strfreev(tokens);
	devc->buflen = 0;

	if (analog) {
		/* Got a measurement. */
		packet.type = SR_DF_ANALOG;
		packet.payload = analog;
		sr_session_send(sdi, &packet);
		sr_sw_limits_update_samples_read(&devc->limits, 1);
		g_free(analog->data);
		g_free(analog);
	}

}

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

	(void)fd;

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

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

	serial = sdi->conn;
	if (revents == G_IO_IN) {
		/* Serial data arrived. */
		while (FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
			len = serial_read_nonblocking(serial, 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 (sr_sw_limits_check(&devc->limits)) {
		sdi->driver->dev_acquisition_stop(sdi);
		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 easier to recover from any
	 * out-of-sync or temporary disconnect issues. */
	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
			|| elapsed > devc->profile->timeout) {
		if (serial_write_blocking(serial, "QM\r", 3, SERIAL_WRITE_TIMEOUT_MS) < 0)
			sr_err("Unable to send QM.");
		devc->cmd_sent_at = now;
		devc->expect_response = TRUE;
	}

	return TRUE;
}
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok 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 <config.h>
	21	#include <stdlib.h>
	22	#include <math.h>
	23	#include <string.h>
	24	#include <glib.h>
	25	#include <libsigrok/libsigrok.h>
	26	#include "libsigrok-internal.h"
	27	#include "fluke-dmm.h"
	28
	29	static struct sr_datafeed_analog handle_qm_18x(const struct sr_dev_inst sdi,
	30	char **tokens)
	31	{
	32	struct sr_datafeed_analog *analog;
	33	struct sr_analog_encoding encoding;
	34	struct sr_analog_meaning meaning;
	35	struct sr_analog_spec spec;
	36	float fvalue;
	37	char e, u;
	38	gboolean is_oor;
	39
	40	if (strcmp(tokens[0], "QM") \|\| !tokens[1])
	41	return NULL;
	42
	43	if ((e = strstr(tokens[1], "Out of range"))) {
	44	is_oor = TRUE;
	45	fvalue = -1;
	46	while (e && e != '.')
	47	e++;
	48	} else {
	49	is_oor = FALSE;
	50	/* Delimit the float, since sr_atof_ascii() wants only
	51	* a valid float here. */
	52	e = tokens[1];
	53	while (e && e != ' ')
	54	e++;
	55	*e++ = '\0';
	56	if (sr_atof_ascii(tokens[1], &fvalue) != SR_OK \|\| fvalue == 0.0) {
	57	/* Happens all the time, when switching modes. */
	58	sr_dbg("Invalid float.");
	59	return NULL;
	60	}
	61	}
	62	while (e && e == ' ')
	63	e++;
	64
	65	analog = g_malloc0(sizeof(struct sr_datafeed_analog));
	66	sr_analog_init(analog, &encoding, &meaning, &spec, 0);
	67	analog->data = g_malloc(sizeof(float));
	68	analog->meaning->channels = sdi->channels;
	69	analog->num_samples = 1;
	70	if (is_oor)
	71	((float )analog->data) = NAN;
	72	else
	73	((float )analog->data) = fvalue;
	74	analog->meaning->mq = 0;
	75
	76	if ((u = strstr(e, "V DC")) \|\| (u = strstr(e, "V AC"))) {
	77	analog->meaning->mq = SR_MQ_VOLTAGE;
	78	analog->meaning->unit = SR_UNIT_VOLT;
	79	if (!is_oor && e[0] == 'm')
	80	((float )analog->data) /= 1000;
	81	/* This catches "V AC", "V DC" and "V AC+DC". */
	82	if (strstr(u, "AC"))
	83	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	84	if (strstr(u, "DC"))
	85	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	86	} else if ((u = strstr(e, "dBV")) \|\| (u = strstr(e, "dBm"))) {
	87	analog->meaning->mq = SR_MQ_VOLTAGE;
	88	if (u[2] == 'm')
	89	analog->meaning->unit = SR_UNIT_DECIBEL_MW;
	90	else
	91	analog->meaning->unit = SR_UNIT_DECIBEL_VOLT;
	92	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	93	} else if ((u = strstr(e, "Ohms"))) {
	94	analog->meaning->mq = SR_MQ_RESISTANCE;
	95	analog->meaning->unit = SR_UNIT_OHM;
	96	if (is_oor)
	97	((float )analog->data) = INFINITY;
	98	else if (e[0] == 'k')
	99	((float )analog->data) *= 1000;
	100	else if (e[0] == 'M')
	101	((float )analog->data) *= 1000000;
	102	} else if (!strcmp(e, "nS")) {
	103	analog->meaning->mq = SR_MQ_CONDUCTANCE;
	104	analog->meaning->unit = SR_UNIT_SIEMENS;
	105	((float )analog->data) /= 1e+9;
	106	} else if ((u = strstr(e, "Farads"))) {
	107	analog->meaning->mq = SR_MQ_CAPACITANCE;
	108	analog->meaning->unit = SR_UNIT_FARAD;
	109	if (!is_oor) {
	110	if (e[0] == 'm')
	111	((float )analog->data) /= 1e+3;
	112	else if (e[0] == 'u')
	113	((float )analog->data) /= 1e+6;
	114	else if (e[0] == 'n')
	115	((float )analog->data) /= 1e+9;
	116	}
	117	} else if ((u = strstr(e, "Deg C")) \|\| (u = strstr(e, "Deg F"))) {
	118	analog->meaning->mq = SR_MQ_TEMPERATURE;
	119	if (u[4] == 'C')
	120	analog->meaning->unit = SR_UNIT_CELSIUS;
	121	else
	122	analog->meaning->unit = SR_UNIT_FAHRENHEIT;
	123	} else if ((u = strstr(e, "A AC")) \|\| (u = strstr(e, "A DC"))) {
	124	analog->meaning->mq = SR_MQ_CURRENT;
	125	analog->meaning->unit = SR_UNIT_AMPERE;
	126	/* This catches "A AC", "A DC" and "A AC+DC". */
	127	if (strstr(u, "AC"))
	128	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	129	if (strstr(u, "DC"))
	130	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	131	if (!is_oor) {
	132	if (e[0] == 'm')
	133	((float )analog->data) /= 1e+3;
	134	else if (e[0] == 'u')
	135	((float )analog->data) /= 1e+6;
	136	}
	137	} else if ((u = strstr(e, "Hz"))) {
	138	analog->meaning->mq = SR_MQ_FREQUENCY;
	139	analog->meaning->unit = SR_UNIT_HERTZ;
	140	if (e[0] == 'k')
	141	((float )analog->data) *= 1e+3;
	142	} else if (!strcmp(e, "%")) {
	143	analog->meaning->mq = SR_MQ_DUTY_CYCLE;
	144	analog->meaning->unit = SR_UNIT_PERCENTAGE;
	145	} else if ((u = strstr(e, "ms"))) {
	146	analog->meaning->mq = SR_MQ_PULSE_WIDTH;
	147	analog->meaning->unit = SR_UNIT_SECOND;
	148	((float )analog->data) /= 1e+3;
	149	}
	150
	151	if (analog->meaning->mq == 0) {
	152	/* Not a valid measurement. */
	153	g_free(analog->data);
	154	g_free(analog);
	155	analog = NULL;
	156	}
	157
	158	return analog;
	159	}
	160
	161	static struct sr_datafeed_analog handle_qm_28x(const struct sr_dev_inst sdi,
	162	char **tokens)
	163	{
	164	struct sr_datafeed_analog *analog;
	165	struct sr_analog_encoding encoding;
	166	struct sr_analog_meaning meaning;
	167	struct sr_analog_spec spec;
	168	float fvalue;
	169
	170	if (!tokens[1])
	171	return NULL;
	172
	173	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK \|\| fvalue == 0.0) {
	174	sr_err("Invalid float '%s'.", tokens[0]);
	175	return NULL;
	176	}
	177
	178	analog = g_malloc0(sizeof(struct sr_datafeed_analog));
	179	sr_analog_init(analog, &encoding, &meaning, &spec, 0);
	180	analog->data = g_malloc(sizeof(float));
	181	analog->meaning->channels = sdi->channels;
	182	analog->num_samples = 1;
	183	((float )analog->data) = fvalue;
	184	analog->meaning->mq = 0;
	185
	186	if (!strcmp(tokens[1], "VAC") \|\| !strcmp(tokens[1], "VDC")) {
	187	analog->meaning->mq = SR_MQ_VOLTAGE;
	188	analog->meaning->unit = SR_UNIT_VOLT;
	189	if (!strcmp(tokens[2], "NORMAL")) {
	190	if (tokens[1][1] == 'A') {
	191	analog->meaning->mqflags \|= SR_MQFLAG_AC;
	192	analog->meaning->mqflags \|= SR_MQFLAG_RMS;
	193	} else
	194	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	195	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	196	((float )analog->data) = NAN;
	197	} else
	198	analog->meaning->mq = 0;
	199	} else if (!strcmp(tokens[1], "dBV") \|\| !strcmp(tokens[1], "dBm")) {
	200	analog->meaning->mq = SR_MQ_VOLTAGE;
	201	if (tokens[1][2] == 'm')
	202	analog->meaning->unit = SR_UNIT_DECIBEL_MW;
	203	else
	204	analog->meaning->unit = SR_UNIT_DECIBEL_VOLT;
	205	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	206	} else if (!strcmp(tokens[1], "CEL") \|\| !strcmp(tokens[1], "FAR")) {
	207	if (!strcmp(tokens[2], "NORMAL")) {
	208	analog->meaning->mq = SR_MQ_TEMPERATURE;
	209	if (tokens[1][0] == 'C')
	210	analog->meaning->unit = SR_UNIT_CELSIUS;
	211	else
	212	analog->meaning->unit = SR_UNIT_FAHRENHEIT;
	213	}
	214	} else if (!strcmp(tokens[1], "OHM")) {
	215	if (!strcmp(tokens[3], "NONE")) {
	216	analog->meaning->mq = SR_MQ_RESISTANCE;
	217	analog->meaning->unit = SR_UNIT_OHM;
	218	if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	219	((float )analog->data) = INFINITY;
	220	} else if (strcmp(tokens[2], "NORMAL"))
	221	analog->meaning->mq = 0;
	222	} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
	223	analog->meaning->mq = SR_MQ_CONTINUITY;
	224	analog->meaning->unit = SR_UNIT_BOOLEAN;
	225	((float )analog->data) = 0.0;
	226	} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
	227	analog->meaning->mq = SR_MQ_CONTINUITY;
	228	analog->meaning->unit = SR_UNIT_BOOLEAN;
	229	((float )analog->data) = 1.0;
	230	}
	231	} else if (!strcmp(tokens[1], "F")
	232	&& !strcmp(tokens[2], "NORMAL")
	233	&& !strcmp(tokens[3], "NONE")) {
	234	analog->meaning->mq = SR_MQ_CAPACITANCE;
	235	analog->meaning->unit = SR_UNIT_FARAD;
	236	} else if (!strcmp(tokens[1], "AAC") \|\| !strcmp(tokens[1], "ADC")) {
	237	analog->meaning->mq = SR_MQ_CURRENT;
	238	analog->meaning->unit = SR_UNIT_AMPERE;
	239	if (!strcmp(tokens[2], "NORMAL")) {
	240	if (tokens[1][1] == 'A') {
	241	analog->meaning->mqflags \|= SR_MQFLAG_AC;
	242	analog->meaning->mqflags \|= SR_MQFLAG_RMS;
	243	} else
	244	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	245	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	246	((float )analog->data) = NAN;
	247	} else
	248	analog->meaning->mq = 0;
	249	} if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
	250	analog->meaning->mq = SR_MQ_FREQUENCY;
	251	analog->meaning->unit = SR_UNIT_HERTZ;
	252	} else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
	253	analog->meaning->mq = SR_MQ_DUTY_CYCLE;
	254	analog->meaning->unit = SR_UNIT_PERCENTAGE;
	255	} else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
	256	analog->meaning->mq = SR_MQ_PULSE_WIDTH;
	257	analog->meaning->unit = SR_UNIT_SECOND;
	258	} else if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
	259	analog->meaning->mq = SR_MQ_CONDUCTANCE;
	260	analog->meaning->unit = SR_UNIT_SIEMENS;
	261	}
	262
	263	if (analog->meaning->mq == 0) {
	264	/* Not a valid measurement. */
	265	g_free(analog->data);
	266	g_free(analog);
	267	analog = NULL;
	268	}
	269
	270	return analog;
	271	}
	272
	273	static void handle_qm_19x_meta(const struct sr_dev_inst sdi, char *tokens)
	274	{
	275	struct dev_context *devc;
	276	int meas_type, meas_unit, meas_char, i;
	277
	278	/* Make sure we have 7 valid tokens. */
	279	for (i = 0; tokens[i] && i < 7; i++);
	280	if (i != 7)
	281	return;
	282
	283	if (strcmp(tokens[1], "1"))
	284	/* Invalid measurement. */
	285	return;
	286
	287	if (strcmp(tokens[2], "3"))
	288	/* Only interested in input from the meter mode source. */
	289	return;
	290
	291	devc = sdi->priv;
	292
	293	/* Measurement type 11 == absolute, 19 = relative */
	294	meas_type = strtol(tokens[0], NULL, 10);
	295	if (meas_type != 11 && meas_type != 19)
	296	/* Device is in some mode we don't support. */
	297	return;
	298
	299	/* We might get metadata for absolute and relative mode (if the device
	300	* is in relative mode). In that case, relative takes precedence. */
	301	if (meas_type == 11 && devc->meas_type == 19)
	302	return;
	303
	304	meas_unit = strtol(tokens[3], NULL, 10);
	305	if (meas_unit == 0)
	306	/* Device is turned off. Really. */
	307	return;
	308	meas_char = strtol(tokens[4], NULL, 10);
	309
	310	devc->mq = devc->unit = devc->mqflags = 0;
	311	switch (meas_unit) {
	312	case 1:
	313	devc->mq = SR_MQ_VOLTAGE;
	314	devc->unit = SR_UNIT_VOLT;
	315	if (meas_char == 1)
	316	devc->mqflags \|= SR_MQFLAG_DC;
	317	else if (meas_char == 2)
	318	devc->mqflags \|= SR_MQFLAG_AC;
	319	else if (meas_char == 3)
	320	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	321	else if (meas_char == 15)
	322	devc->mqflags \|= SR_MQFLAG_DIODE;
	323	break;
	324	case 2:
	325	devc->mq = SR_MQ_CURRENT;
	326	devc->unit = SR_UNIT_AMPERE;
	327	if (meas_char == 1)
	328	devc->mqflags \|= SR_MQFLAG_DC;
	329	else if (meas_char == 2)
	330	devc->mqflags \|= SR_MQFLAG_AC;
	331	else if (meas_char == 3)
	332	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	333	break;
	334	case 3:
	335	if (meas_char == 1) {
	336	devc->mq = SR_MQ_RESISTANCE;
	337	devc->unit = SR_UNIT_OHM;
	338	} else if (meas_char == 16) {
	339	devc->mq = SR_MQ_CONTINUITY;
	340	devc->unit = SR_UNIT_BOOLEAN;
	341	}
	342	break;
	343	case 12:
	344	devc->mq = SR_MQ_TEMPERATURE;
	345	devc->unit = SR_UNIT_CELSIUS;
	346	break;
	347	case 13:
	348	devc->mq = SR_MQ_TEMPERATURE;
	349	devc->unit = SR_UNIT_FAHRENHEIT;
	350	break;
	351	default:
	352	sr_dbg("unknown unit: %d", meas_unit);
	353	}
	354	if (devc->mq == 0 && devc->unit == 0)
	355	return;
	356
	357	/* If we got here, we know how to interpret the measurement. */
	358	devc->meas_type = meas_type;
	359	if (meas_type == 11)
	360	/* Absolute meter reading. */
	361	devc->is_relative = FALSE;
	362	else if (!strcmp(tokens[0], "19"))
	363	/* Relative meter reading. */
	364	devc->is_relative = TRUE;
	365
	366	}
	367
	368	static void handle_qm_19x_data(const struct sr_dev_inst sdi, char *tokens)
	369	{
	370	struct dev_context *devc;
	371	struct sr_datafeed_packet packet;
	372	struct sr_datafeed_analog analog;
	373	struct sr_analog_encoding encoding;
	374	struct sr_analog_meaning meaning;
	375	struct sr_analog_spec spec;
	376	float fvalue;
	377
	378	if (!strcmp(tokens[0], "9.9E+37")) {
	379	/* An invalid measurement shows up on the display as "OL", but
	380	* comes through like this. Since comparing 38-digit floats
	381	* is rather problematic, we'll cut through this here. */
	382	fvalue = NAN;
	383	} else {
	384	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK \|\| fvalue == 0.0) {
	385	sr_err("Invalid float '%s'.", tokens[0]);
	386	return;
	387	}
	388	}
	389
	390	devc = sdi->priv;
	391	if (devc->mq == 0 \|\| devc->unit == 0)
	392	/* Don't have valid metadata yet. */
	393	return;
	394
	395	if (devc->mq == SR_MQ_RESISTANCE && isnan(fvalue))
	396	fvalue = INFINITY;
	397	else if (devc->mq == SR_MQ_CONTINUITY) {
	398	if (isnan(fvalue))
	399	fvalue = 0.0;
	400	else
	401	fvalue = 1.0;
	402	}
	403
	404	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	405	analog.meaning->channels = sdi->channels;
	406	analog.num_samples = 1;
	407	analog.data = &fvalue;
	408	analog.meaning->mq = devc->mq;
	409	analog.meaning->unit = devc->unit;
	410	analog.meaning->mqflags = 0;
	411	packet.type = SR_DF_ANALOG;
	412	packet.payload = &analog;
	413	sr_session_send(sdi, &packet);
	414
	415	sr_sw_limits_update_samples_read(&devc->limits, 1);
	416	}
	417
	418	static void handle_line(const struct sr_dev_inst *sdi)
	419	{
	420	struct dev_context *devc;
	421	struct sr_serial_dev_inst *serial;
	422	struct sr_datafeed_packet packet;
	423	struct sr_datafeed_analog *analog;
	424	int num_tokens, n, i;
	425	char cmd[16], **tokens;
	426
	427	devc = sdi->priv;
	428	serial = sdi->conn;
	429	sr_spew("Received line '%s' (%d).", devc->buf, devc->buflen);
	430
	431	if (devc->buflen == 1) {
	432	if (devc->buf[0] != '0') {
	433	/* Not just a CMD_ACK from the query command. */
	434	sr_dbg("Got CMD_ACK '%c'.", devc->buf[0]);
	435	devc->expect_response = FALSE;
	436	}
	437	devc->buflen = 0;
	438	return;
	439	}
	440
	441	analog = NULL;
	442	tokens = g_strsplit(devc->buf, ",", 0);
	443	if (tokens[0]) {
	444	if (devc->profile->model == FLUKE_187 \|\| devc->profile->model == FLUKE_189) {
	445	devc->expect_response = FALSE;
	446	analog = handle_qm_18x(sdi, tokens);
	447	} else if (devc->profile->model == FLUKE_287 \|\| devc->profile->model == FLUKE_289) {
	448	devc->expect_response = FALSE;
	449	analog = handle_qm_28x(sdi, tokens);
	450	} else if (devc->profile->model == FLUKE_190) {
	451	devc->expect_response = FALSE;
	452	for (num_tokens = 0; tokens[num_tokens]; num_tokens++);
	453	if (num_tokens >= 7) {
	454	/* Response to QM: this is a comma-separated list of
	455	* fields with metadata about the measurement. This
	456	* format can return multiple sets of metadata,
	457	* split into sets of 7 tokens each. */
	458	devc->meas_type = 0;
	459	for (i = 0; i < num_tokens; i += 7)
	460	handle_qm_19x_meta(sdi, tokens + i);
	461	if (devc->meas_type) {
	462	/* Slip the request in now, before the main
	463	* timer loop asks for metadata again. */
	464	n = sprintf(cmd, "QM %d\r", devc->meas_type);
	465	if (serial_write_blocking(serial, cmd, n, SERIAL_WRITE_TIMEOUT_MS) < 0)
	466	sr_err("Unable to send QM (measurement).");
	467	}
	468	} else {
	469	/* Response to QM <n> measurement request. */
	470	handle_qm_19x_data(sdi, tokens);
	471	}
	472	}
	473	}
	474	g_strfreev(tokens);
	475	devc->buflen = 0;
	476
	477	if (analog) {
	478	/* Got a measurement. */
	479	packet.type = SR_DF_ANALOG;
	480	packet.payload = analog;
	481	sr_session_send(sdi, &packet);
	482	sr_sw_limits_update_samples_read(&devc->limits, 1);
	483	g_free(analog->data);
	484	g_free(analog);
	485	}
	486
	487	}
	488
	489	SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
	490	{
	491	struct sr_dev_inst *sdi;
	492	struct dev_context *devc;
	493	struct sr_serial_dev_inst *serial;
	494	int len;
	495	int64_t now, elapsed;
	496
	497	(void)fd;
	498
	499	if (!(sdi = cb_data))
	500	return TRUE;
	501
	502	if (!(devc = sdi->priv))
	503	return TRUE;
	504
	505	serial = sdi->conn;
	506	if (revents == G_IO_IN) {
	507	/* Serial data arrived. */
	508	while (FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
	509	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
	510	if (len < 1)
	511	break;
	512	devc->buflen++;
	513	*(devc->buf + devc->buflen) = '\0';
	514	if (*(devc->buf + devc->buflen - 1) == '\r') {
	515	*(devc->buf + --devc->buflen) = '\0';
	516	handle_line(sdi);
	517	break;
	518	}
	519	}
	520	}
	521
	522	if (sr_sw_limits_check(&devc->limits)) {
	523	sdi->driver->dev_acquisition_stop(sdi);
	524	return TRUE;
	525	}
	526
	527	now = g_get_monotonic_time() / 1000;
	528	elapsed = now - devc->cmd_sent_at;
	529	/* Send query command at poll_period interval, or after 1 second
	530	* has elapsed. This will make it easier to recover from any
	531	* out-of-sync or temporary disconnect issues. */
	532	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
	533	\|\| elapsed > devc->profile->timeout) {
	534	if (serial_write_blocking(serial, "QM\r", 3, SERIAL_WRITE_TIMEOUT_MS) < 0)
	535	sr_err("Unable to send QM.");
	536	devc->cmd_sent_at = now;
	537	devc->expect_response = TRUE;
	538	}
	539
	540	return TRUE;
	541	}