[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));
	/* TODO: Use proper 'digits' value for this device (and its modes). */
	sr_analog_init(analog, &encoding, &meaning, &spec, 2);
	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));
	/* TODO: Use proper 'digits' value for this device (and its modes). */
	sr_analog_init(analog, &encoding, &meaning, &spec, 2);
	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;
	}

	/* TODO: Use proper 'digits' value for this device (and its modes). */
	sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
	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	/* TODO: Use proper 'digits' value for this device (and its modes). */
	67	sr_analog_init(analog, &encoding, &meaning, &spec, 2);
	68	analog->data = g_malloc(sizeof(float));
	69	analog->meaning->channels = sdi->channels;
	70	analog->num_samples = 1;
	71	if (is_oor)
	72	((float )analog->data) = NAN;
	73	else
	74	((float )analog->data) = fvalue;
	75	analog->meaning->mq = 0;
	76
	77	if ((u = strstr(e, "V DC")) \|\| (u = strstr(e, "V AC"))) {
	78	analog->meaning->mq = SR_MQ_VOLTAGE;
	79	analog->meaning->unit = SR_UNIT_VOLT;
	80	if (!is_oor && e[0] == 'm')
	81	((float )analog->data) /= 1000;
	82	/* This catches "V AC", "V DC" and "V AC+DC". */
	83	if (strstr(u, "AC"))
	84	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	85	if (strstr(u, "DC"))
	86	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	87	} else if ((u = strstr(e, "dBV")) \|\| (u = strstr(e, "dBm"))) {
	88	analog->meaning->mq = SR_MQ_VOLTAGE;
	89	if (u[2] == 'm')
	90	analog->meaning->unit = SR_UNIT_DECIBEL_MW;
	91	else
	92	analog->meaning->unit = SR_UNIT_DECIBEL_VOLT;
	93	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	94	} else if ((u = strstr(e, "Ohms"))) {
	95	analog->meaning->mq = SR_MQ_RESISTANCE;
	96	analog->meaning->unit = SR_UNIT_OHM;
	97	if (is_oor)
	98	((float )analog->data) = INFINITY;
	99	else if (e[0] == 'k')
	100	((float )analog->data) *= 1000;
	101	else if (e[0] == 'M')
	102	((float )analog->data) *= 1000000;
	103	} else if (!strcmp(e, "nS")) {
	104	analog->meaning->mq = SR_MQ_CONDUCTANCE;
	105	analog->meaning->unit = SR_UNIT_SIEMENS;
	106	((float )analog->data) /= 1e+9;
	107	} else if ((u = strstr(e, "Farads"))) {
	108	analog->meaning->mq = SR_MQ_CAPACITANCE;
	109	analog->meaning->unit = SR_UNIT_FARAD;
	110	if (!is_oor) {
	111	if (e[0] == 'm')
	112	((float )analog->data) /= 1e+3;
	113	else if (e[0] == 'u')
	114	((float )analog->data) /= 1e+6;
	115	else if (e[0] == 'n')
	116	((float )analog->data) /= 1e+9;
	117	}
	118	} else if ((u = strstr(e, "Deg C")) \|\| (u = strstr(e, "Deg F"))) {
	119	analog->meaning->mq = SR_MQ_TEMPERATURE;
	120	if (u[4] == 'C')
	121	analog->meaning->unit = SR_UNIT_CELSIUS;
	122	else
	123	analog->meaning->unit = SR_UNIT_FAHRENHEIT;
	124	} else if ((u = strstr(e, "A AC")) \|\| (u = strstr(e, "A DC"))) {
	125	analog->meaning->mq = SR_MQ_CURRENT;
	126	analog->meaning->unit = SR_UNIT_AMPERE;
	127	/* This catches "A AC", "A DC" and "A AC+DC". */
	128	if (strstr(u, "AC"))
	129	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	130	if (strstr(u, "DC"))
	131	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	132	if (!is_oor) {
	133	if (e[0] == 'm')
	134	((float )analog->data) /= 1e+3;
	135	else if (e[0] == 'u')
	136	((float )analog->data) /= 1e+6;
	137	}
	138	} else if ((u = strstr(e, "Hz"))) {
	139	analog->meaning->mq = SR_MQ_FREQUENCY;
	140	analog->meaning->unit = SR_UNIT_HERTZ;
	141	if (e[0] == 'k')
	142	((float )analog->data) *= 1e+3;
	143	} else if (!strcmp(e, "%")) {
	144	analog->meaning->mq = SR_MQ_DUTY_CYCLE;
	145	analog->meaning->unit = SR_UNIT_PERCENTAGE;
	146	} else if ((u = strstr(e, "ms"))) {
	147	analog->meaning->mq = SR_MQ_PULSE_WIDTH;
	148	analog->meaning->unit = SR_UNIT_SECOND;
	149	((float )analog->data) /= 1e+3;
	150	}
	151
	152	if (analog->meaning->mq == 0) {
	153	/* Not a valid measurement. */
	154	g_free(analog->data);
	155	g_free(analog);
	156	analog = NULL;
	157	}
	158
	159	return analog;
	160	}
	161
	162	static struct sr_datafeed_analog handle_qm_28x(const struct sr_dev_inst sdi,
	163	char **tokens)
	164	{
	165	struct sr_datafeed_analog *analog;
	166	struct sr_analog_encoding encoding;
	167	struct sr_analog_meaning meaning;
	168	struct sr_analog_spec spec;
	169	float fvalue;
	170
	171	if (!tokens[1])
	172	return NULL;
	173
	174	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK \|\| fvalue == 0.0) {
	175	sr_err("Invalid float '%s'.", tokens[0]);
	176	return NULL;
	177	}
	178
	179	analog = g_malloc0(sizeof(struct sr_datafeed_analog));
	180	/* TODO: Use proper 'digits' value for this device (and its modes). */
	181	sr_analog_init(analog, &encoding, &meaning, &spec, 2);
	182	analog->data = g_malloc(sizeof(float));
	183	analog->meaning->channels = sdi->channels;
	184	analog->num_samples = 1;
	185	((float )analog->data) = fvalue;
	186	analog->meaning->mq = 0;
	187
	188	if (!strcmp(tokens[1], "VAC") \|\| !strcmp(tokens[1], "VDC")) {
	189	analog->meaning->mq = SR_MQ_VOLTAGE;
	190	analog->meaning->unit = SR_UNIT_VOLT;
	191	if (!strcmp(tokens[2], "NORMAL")) {
	192	if (tokens[1][1] == 'A') {
	193	analog->meaning->mqflags \|= SR_MQFLAG_AC;
	194	analog->meaning->mqflags \|= SR_MQFLAG_RMS;
	195	} else
	196	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	197	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	198	((float )analog->data) = NAN;
	199	} else
	200	analog->meaning->mq = 0;
	201	} else if (!strcmp(tokens[1], "dBV") \|\| !strcmp(tokens[1], "dBm")) {
	202	analog->meaning->mq = SR_MQ_VOLTAGE;
	203	if (tokens[1][2] == 'm')
	204	analog->meaning->unit = SR_UNIT_DECIBEL_MW;
	205	else
	206	analog->meaning->unit = SR_UNIT_DECIBEL_VOLT;
	207	analog->meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	208	} else if (!strcmp(tokens[1], "CEL") \|\| !strcmp(tokens[1], "FAR")) {
	209	if (!strcmp(tokens[2], "NORMAL")) {
	210	analog->meaning->mq = SR_MQ_TEMPERATURE;
	211	if (tokens[1][0] == 'C')
	212	analog->meaning->unit = SR_UNIT_CELSIUS;
	213	else
	214	analog->meaning->unit = SR_UNIT_FAHRENHEIT;
	215	}
	216	} else if (!strcmp(tokens[1], "OHM")) {
	217	if (!strcmp(tokens[3], "NONE")) {
	218	analog->meaning->mq = SR_MQ_RESISTANCE;
	219	analog->meaning->unit = SR_UNIT_OHM;
	220	if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	221	((float )analog->data) = INFINITY;
	222	} else if (strcmp(tokens[2], "NORMAL"))
	223	analog->meaning->mq = 0;
	224	} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
	225	analog->meaning->mq = SR_MQ_CONTINUITY;
	226	analog->meaning->unit = SR_UNIT_BOOLEAN;
	227	((float )analog->data) = 0.0;
	228	} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
	229	analog->meaning->mq = SR_MQ_CONTINUITY;
	230	analog->meaning->unit = SR_UNIT_BOOLEAN;
	231	((float )analog->data) = 1.0;
	232	}
	233	} else if (!strcmp(tokens[1], "F")
	234	&& !strcmp(tokens[2], "NORMAL")
	235	&& !strcmp(tokens[3], "NONE")) {
	236	analog->meaning->mq = SR_MQ_CAPACITANCE;
	237	analog->meaning->unit = SR_UNIT_FARAD;
	238	} else if (!strcmp(tokens[1], "AAC") \|\| !strcmp(tokens[1], "ADC")) {
	239	analog->meaning->mq = SR_MQ_CURRENT;
	240	analog->meaning->unit = SR_UNIT_AMPERE;
	241	if (!strcmp(tokens[2], "NORMAL")) {
	242	if (tokens[1][1] == 'A') {
	243	analog->meaning->mqflags \|= SR_MQFLAG_AC;
	244	analog->meaning->mqflags \|= SR_MQFLAG_RMS;
	245	} else
	246	analog->meaning->mqflags \|= SR_MQFLAG_DC;
	247	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	248	((float )analog->data) = NAN;
	249	} else
	250	analog->meaning->mq = 0;
	251	} if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
	252	analog->meaning->mq = SR_MQ_FREQUENCY;
	253	analog->meaning->unit = SR_UNIT_HERTZ;
	254	} else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
	255	analog->meaning->mq = SR_MQ_DUTY_CYCLE;
	256	analog->meaning->unit = SR_UNIT_PERCENTAGE;
	257	} else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
	258	analog->meaning->mq = SR_MQ_PULSE_WIDTH;
	259	analog->meaning->unit = SR_UNIT_SECOND;
	260	} else if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
	261	analog->meaning->mq = SR_MQ_CONDUCTANCE;
	262	analog->meaning->unit = SR_UNIT_SIEMENS;
	263	}
	264
	265	if (analog->meaning->mq == 0) {
	266	/* Not a valid measurement. */
	267	g_free(analog->data);
	268	g_free(analog);
	269	analog = NULL;
	270	}
	271
	272	return analog;
	273	}
	274
	275	static void handle_qm_19x_meta(const struct sr_dev_inst sdi, char *tokens)
	276	{
	277	struct dev_context *devc;
	278	int meas_type, meas_unit, meas_char, i;
	279
	280	/* Make sure we have 7 valid tokens. */
	281	for (i = 0; tokens[i] && i < 7; i++);
	282	if (i != 7)
	283	return;
	284
	285	if (strcmp(tokens[1], "1"))
	286	/* Invalid measurement. */
	287	return;
	288
	289	if (strcmp(tokens[2], "3"))
	290	/* Only interested in input from the meter mode source. */
	291	return;
	292
	293	devc = sdi->priv;
	294
	295	/* Measurement type 11 == absolute, 19 = relative */
	296	meas_type = strtol(tokens[0], NULL, 10);
	297	if (meas_type != 11 && meas_type != 19)
	298	/* Device is in some mode we don't support. */
	299	return;
	300
	301	/* We might get metadata for absolute and relative mode (if the device
	302	* is in relative mode). In that case, relative takes precedence. */
	303	if (meas_type == 11 && devc->meas_type == 19)
	304	return;
	305
	306	meas_unit = strtol(tokens[3], NULL, 10);
	307	if (meas_unit == 0)
	308	/* Device is turned off. Really. */
	309	return;
	310	meas_char = strtol(tokens[4], NULL, 10);
	311
	312	devc->mq = devc->unit = devc->mqflags = 0;
	313	switch (meas_unit) {
	314	case 1:
	315	devc->mq = SR_MQ_VOLTAGE;
	316	devc->unit = SR_UNIT_VOLT;
	317	if (meas_char == 1)
	318	devc->mqflags \|= SR_MQFLAG_DC;
	319	else if (meas_char == 2)
	320	devc->mqflags \|= SR_MQFLAG_AC;
	321	else if (meas_char == 3)
	322	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	323	else if (meas_char == 15)
	324	devc->mqflags \|= SR_MQFLAG_DIODE;
	325	break;
	326	case 2:
	327	devc->mq = SR_MQ_CURRENT;
	328	devc->unit = SR_UNIT_AMPERE;
	329	if (meas_char == 1)
	330	devc->mqflags \|= SR_MQFLAG_DC;
	331	else if (meas_char == 2)
	332	devc->mqflags \|= SR_MQFLAG_AC;
	333	else if (meas_char == 3)
	334	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	335	break;
	336	case 3:
	337	if (meas_char == 1) {
	338	devc->mq = SR_MQ_RESISTANCE;
	339	devc->unit = SR_UNIT_OHM;
	340	} else if (meas_char == 16) {
	341	devc->mq = SR_MQ_CONTINUITY;
	342	devc->unit = SR_UNIT_BOOLEAN;
	343	}
	344	break;
	345	case 12:
	346	devc->mq = SR_MQ_TEMPERATURE;
	347	devc->unit = SR_UNIT_CELSIUS;
	348	break;
	349	case 13:
	350	devc->mq = SR_MQ_TEMPERATURE;
	351	devc->unit = SR_UNIT_FAHRENHEIT;
	352	break;
	353	default:
	354	sr_dbg("unknown unit: %d", meas_unit);
	355	}
	356	if (devc->mq == 0 && devc->unit == 0)
	357	return;
	358
	359	/* If we got here, we know how to interpret the measurement. */
	360	devc->meas_type = meas_type;
	361	if (meas_type == 11)
	362	/* Absolute meter reading. */
	363	devc->is_relative = FALSE;
	364	else if (!strcmp(tokens[0], "19"))
	365	/* Relative meter reading. */
	366	devc->is_relative = TRUE;
	367
	368	}
	369
	370	static void handle_qm_19x_data(const struct sr_dev_inst sdi, char *tokens)
	371	{
	372	struct dev_context *devc;
	373	struct sr_datafeed_packet packet;
	374	struct sr_datafeed_analog analog;
	375	struct sr_analog_encoding encoding;
	376	struct sr_analog_meaning meaning;
	377	struct sr_analog_spec spec;
	378	float fvalue;
	379
	380	if (!strcmp(tokens[0], "9.9E+37")) {
	381	/* An invalid measurement shows up on the display as "OL", but
	382	* comes through like this. Since comparing 38-digit floats
	383	* is rather problematic, we'll cut through this here. */
	384	fvalue = NAN;
	385	} else {
	386	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK \|\| fvalue == 0.0) {
	387	sr_err("Invalid float '%s'.", tokens[0]);
	388	return;
	389	}
	390	}
	391
	392	devc = sdi->priv;
	393	if (devc->mq == 0 \|\| devc->unit == 0)
	394	/* Don't have valid metadata yet. */
	395	return;
	396
	397	if (devc->mq == SR_MQ_RESISTANCE && isnan(fvalue))
	398	fvalue = INFINITY;
	399	else if (devc->mq == SR_MQ_CONTINUITY) {
	400	if (isnan(fvalue))
	401	fvalue = 0.0;
	402	else
	403	fvalue = 1.0;
	404	}
	405
	406	/* TODO: Use proper 'digits' value for this device (and its modes). */
	407	sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
	408	analog.meaning->channels = sdi->channels;
	409	analog.num_samples = 1;
	410	analog.data = &fvalue;
	411	analog.meaning->mq = devc->mq;
	412	analog.meaning->unit = devc->unit;
	413	analog.meaning->mqflags = 0;
	414	packet.type = SR_DF_ANALOG;
	415	packet.payload = &analog;
	416	sr_session_send(sdi, &packet);
	417
	418	sr_sw_limits_update_samples_read(&devc->limits, 1);
	419	}
	420
	421	static void handle_line(const struct sr_dev_inst *sdi)
	422	{
	423	struct dev_context *devc;
	424	struct sr_serial_dev_inst *serial;
	425	struct sr_datafeed_packet packet;
	426	struct sr_datafeed_analog *analog;
	427	int num_tokens, n, i;
	428	char cmd[16], **tokens;
	429
	430	devc = sdi->priv;
	431	serial = sdi->conn;
	432	sr_spew("Received line '%s' (%d).", devc->buf, devc->buflen);
	433
	434	if (devc->buflen == 1) {
	435	if (devc->buf[0] != '0') {
	436	/* Not just a CMD_ACK from the query command. */
	437	sr_dbg("Got CMD_ACK '%c'.", devc->buf[0]);
	438	devc->expect_response = FALSE;
	439	}
	440	devc->buflen = 0;
	441	return;
	442	}
	443
	444	analog = NULL;
	445	tokens = g_strsplit(devc->buf, ",", 0);
	446	if (tokens[0]) {
	447	if (devc->profile->model == FLUKE_187 \|\| devc->profile->model == FLUKE_189) {
	448	devc->expect_response = FALSE;
	449	analog = handle_qm_18x(sdi, tokens);
	450	} else if (devc->profile->model == FLUKE_287 \|\| devc->profile->model == FLUKE_289) {
	451	devc->expect_response = FALSE;
	452	analog = handle_qm_28x(sdi, tokens);
	453	} else if (devc->profile->model == FLUKE_190) {
	454	devc->expect_response = FALSE;
	455	for (num_tokens = 0; tokens[num_tokens]; num_tokens++);
	456	if (num_tokens >= 7) {
	457	/* Response to QM: this is a comma-separated list of
	458	* fields with metadata about the measurement. This
	459	* format can return multiple sets of metadata,
	460	* split into sets of 7 tokens each. */
	461	devc->meas_type = 0;
	462	for (i = 0; i < num_tokens; i += 7)
	463	handle_qm_19x_meta(sdi, tokens + i);
	464	if (devc->meas_type) {
	465	/* Slip the request in now, before the main
	466	* timer loop asks for metadata again. */
	467	n = sprintf(cmd, "QM %d\r", devc->meas_type);
	468	if (serial_write_blocking(serial, cmd, n, SERIAL_WRITE_TIMEOUT_MS) < 0)
	469	sr_err("Unable to send QM (measurement).");
	470	}
	471	} else {
	472	/* Response to QM <n> measurement request. */
	473	handle_qm_19x_data(sdi, tokens);
	474	}
	475	}
	476	}
	477	g_strfreev(tokens);
	478	devc->buflen = 0;
	479
	480	if (analog) {
	481	/* Got a measurement. */
	482	packet.type = SR_DF_ANALOG;
	483	packet.payload = analog;
	484	sr_session_send(sdi, &packet);
	485	sr_sw_limits_update_samples_read(&devc->limits, 1);
	486	g_free(analog->data);
	487	g_free(analog);
	488	}
	489
	490	}
	491
	492	SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
	493	{
	494	struct sr_dev_inst *sdi;
	495	struct dev_context *devc;
	496	struct sr_serial_dev_inst *serial;
	497	int len;
	498	int64_t now, elapsed;
	499
	500	(void)fd;
	501
	502	if (!(sdi = cb_data))
	503	return TRUE;
	504
	505	if (!(devc = sdi->priv))
	506	return TRUE;
	507
	508	serial = sdi->conn;
	509	if (revents == G_IO_IN) {
	510	/* Serial data arrived. */
	511	while (FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
	512	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
	513	if (len < 1)
	514	break;
	515	devc->buflen++;
	516	*(devc->buf + devc->buflen) = '\0';
	517	if (*(devc->buf + devc->buflen - 1) == '\r') {
	518	*(devc->buf + --devc->buflen) = '\0';
	519	handle_line(sdi);
	520	break;
	521	}
	522	}
	523	}
	524
	525	if (sr_sw_limits_check(&devc->limits)) {
	526	sdi->driver->dev_acquisition_stop(sdi);
	527	return TRUE;
	528	}
	529
	530	now = g_get_monotonic_time() / 1000;
	531	elapsed = now - devc->cmd_sent_at;
	532	/* Send query command at poll_period interval, or after 1 second
	533	* has elapsed. This will make it easier to recover from any
	534	* out-of-sync or temporary disconnect issues. */
	535	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
	536	\|\| elapsed > devc->profile->timeout) {
	537	if (serial_write_blocking(serial, "QM\r", 3, SERIAL_WRITE_TIMEOUT_MS) < 0)
	538	sr_err("Unable to send QM.");
	539	devc->cmd_sent_at = now;
	540	devc->expect_response = TRUE;
	541	}
	542
	543	return TRUE;
	544	}