[libsigrok.git] / src / hardware / fluke-dmm / protocol.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 "protocol.h"

static int count_digits(const char *str) {
	int digits;

	while (*str && *str != ' ' && *str != ',' && *str != '.')
		str++;

	digits = 0;
	if (*str == '.') {
		str++;
		while (*str && *str != ' ' && *str != ',') {
			str++;
			digits++;
		}
	}

	return digits;
}

static void handle_qm_18x(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;
	char *e, *u;
	gboolean is_oor;
	int digits;

	devc = sdi->priv;

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

	if ((e = strstr(tokens[1], "Out of range"))) {
		is_oor = TRUE;
		fvalue = -1;
		digits = 0;
		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) {
			/* Happens all the time, when switching modes. */
			sr_dbg("Invalid float: '%s'", tokens[1]);
			return;
		}
		digits = count_digits(tokens[1]);
	}
	while (*e && *e == ' ')
		e++;

	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
	analog.data = &fvalue;
	analog.meaning->channels = sdi->channels;
	analog.num_samples = 1;
	if (is_oor)
		fvalue = NAN;
	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')
			fvalue /= 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)
			fvalue = INFINITY;
		else if (e[0] == 'k')
			fvalue *= 1000;
		else if (e[0] == 'M')
			fvalue *= 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')
				fvalue /= 1e+3;
			else if (e[0] == 'u')
				fvalue /= 1e+6;
			else if (e[0] == 'n')
				fvalue /= 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')
				fvalue /= 1e+3;
			else if (e[0] == 'u')
				fvalue /= 1e+6;
		}
	} else if ((u = strstr(e, "Hz"))) {
		analog.meaning->mq = SR_MQ_FREQUENCY;
		analog.meaning->unit = SR_UNIT_HERTZ;
		if (e[0] == 'k')
			fvalue *= 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;
		fvalue /= 1e+3;
	}

	if (analog.meaning->mq != 0) {
		/* 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);
	}
}

static void handle_qm_28x(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;
	int digits;

	devc = sdi->priv;

	if (!tokens[1])
		return;

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

	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
	analog.data = &fvalue;
	analog.meaning->channels = sdi->channels;
	analog.num_samples = 1;
	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")) {
			fvalue = 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")) {
				fvalue = 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;
			fvalue = 0.0;
		} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
			analog.meaning->mq = SR_MQ_CONTINUITY;
			analog.meaning->unit = SR_UNIT_BOOLEAN;
			fvalue = 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")) {
			fvalue = NAN;
		} else
			analog.meaning->mq = 0;
	} else 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) {
		/* 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);
	}
}

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 = 0;
	devc->unit = 0;
	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 | SR_MQFLAG_DC;
		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;
	int digits;

	digits = 2;
	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;
		}
		digits = count_digits(tokens[0]);
	}

	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, digits);
	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;
	int num_tokens, n, i;
	char cmd[16], **tokens;
	int ret;

	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;
	}

	tokens = g_strsplit(devc->buf, ",", 0);
	if (tokens[0]) {
		switch (devc->profile->model) {
		case FLUKE_87:
		case FLUKE_89:
		case FLUKE_187:
		case FLUKE_189:
			devc->expect_response = FALSE;
			handle_qm_18x(sdi, tokens);
			break;
		case FLUKE_190:
			devc->expect_response = FALSE;
			num_tokens = g_strv_length(tokens);
			if (num_tokens < 7) {
				/* Response to QM <n> measurement request. */
				handle_qm_19x_data(sdi, tokens);
				break;
			}
			/*
			 * 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);
				ret = serial_write_blocking(serial,
					cmd, n, SERIAL_WRITE_TIMEOUT_MS);
				if (ret < 0)
					sr_err("Cannot send QM (measurement).");
			}
			break;
		case FLUKE_287:
		case FLUKE_289:
			devc->expect_response = FALSE;
			handle_qm_28x(sdi, tokens);
			break;
		}
	}
	g_strfreev(tokens);
	devc->buflen = 0;
}

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)) {
		sr_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 "protocol.h"
	28
	29	static int count_digits(const char *str) {
	30	int digits;
	31
	32	while (str && str != ' ' && str != ',' && str != '.')
	33	str++;
	34
	35	digits = 0;
	36	if (*str == '.') {
	37	str++;
	38	while (str && str != ' ' && *str != ',') {
	39	str++;
	40	digits++;
	41	}
	42	}
	43
	44	return digits;
	45	}
	46
	47	static void handle_qm_18x(const struct sr_dev_inst sdi, char *tokens)
	48	{
	49	struct dev_context *devc;
	50	struct sr_datafeed_packet packet;
	51	struct sr_datafeed_analog analog;
	52	struct sr_analog_encoding encoding;
	53	struct sr_analog_meaning meaning;
	54	struct sr_analog_spec spec;
	55	float fvalue;
	56	char e, u;
	57	gboolean is_oor;
	58	int digits;
	59
	60	devc = sdi->priv;
	61
	62	if (strcmp(tokens[0], "QM") \|\| !tokens[1])
	63	return;
	64
	65	if ((e = strstr(tokens[1], "Out of range"))) {
	66	is_oor = TRUE;
	67	fvalue = -1;
	68	digits = 0;
	69	while (e && e != '.')
	70	e++;
	71	} else {
	72	is_oor = FALSE;
	73	/* Delimit the float, since sr_atof_ascii() wants only
	74	* a valid float here. */
	75	e = tokens[1];
	76	while (e && e != ' ')
	77	e++;
	78	*e++ = '\0';
	79	if (sr_atof_ascii(tokens[1], &fvalue) != SR_OK) {
	80	/* Happens all the time, when switching modes. */
	81	sr_dbg("Invalid float: '%s'", tokens[1]);
	82	return;
	83	}
	84	digits = count_digits(tokens[1]);
	85	}
	86	while (e && e == ' ')
	87	e++;
	88
	89	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
	90	analog.data = &fvalue;
	91	analog.meaning->channels = sdi->channels;
	92	analog.num_samples = 1;
	93	if (is_oor)
	94	fvalue = NAN;
	95	analog.meaning->mq = 0;
	96
	97	if ((u = strstr(e, "V DC")) \|\| (u = strstr(e, "V AC"))) {
	98	analog.meaning->mq = SR_MQ_VOLTAGE;
	99	analog.meaning->unit = SR_UNIT_VOLT;
	100	if (!is_oor && e[0] == 'm')
	101	fvalue /= 1000;
	102	/* This catches "V AC", "V DC" and "V AC+DC". */
	103	if (strstr(u, "AC"))
	104	analog.meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	105	if (strstr(u, "DC"))
	106	analog.meaning->mqflags \|= SR_MQFLAG_DC;
	107	} else if ((u = strstr(e, "dBV")) \|\| (u = strstr(e, "dBm"))) {
	108	analog.meaning->mq = SR_MQ_VOLTAGE;
	109	if (u[2] == 'm')
	110	analog.meaning->unit = SR_UNIT_DECIBEL_MW;
	111	else
	112	analog.meaning->unit = SR_UNIT_DECIBEL_VOLT;
	113	analog.meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	114	} else if ((u = strstr(e, "Ohms"))) {
	115	analog.meaning->mq = SR_MQ_RESISTANCE;
	116	analog.meaning->unit = SR_UNIT_OHM;
	117	if (is_oor)
	118	fvalue = INFINITY;
	119	else if (e[0] == 'k')
	120	fvalue *= 1000;
	121	else if (e[0] == 'M')
	122	fvalue *= 1000000;
	123	} else if (!strcmp(e, "nS")) {
	124	analog.meaning->mq = SR_MQ_CONDUCTANCE;
	125	analog.meaning->unit = SR_UNIT_SIEMENS;
	126	((float )analog.data) /= 1e+9;
	127	} else if ((u = strstr(e, "Farads"))) {
	128	analog.meaning->mq = SR_MQ_CAPACITANCE;
	129	analog.meaning->unit = SR_UNIT_FARAD;
	130	if (!is_oor) {
	131	if (e[0] == 'm')
	132	fvalue /= 1e+3;
	133	else if (e[0] == 'u')
	134	fvalue /= 1e+6;
	135	else if (e[0] == 'n')
	136	fvalue /= 1e+9;
	137	}
	138	} else if ((u = strstr(e, "Deg C")) \|\| (u = strstr(e, "Deg F"))) {
	139	analog.meaning->mq = SR_MQ_TEMPERATURE;
	140	if (u[4] == 'C')
	141	analog.meaning->unit = SR_UNIT_CELSIUS;
	142	else
	143	analog.meaning->unit = SR_UNIT_FAHRENHEIT;
	144	} else if ((u = strstr(e, "A AC")) \|\| (u = strstr(e, "A DC"))) {
	145	analog.meaning->mq = SR_MQ_CURRENT;
	146	analog.meaning->unit = SR_UNIT_AMPERE;
	147	/* This catches "A AC", "A DC" and "A AC+DC". */
	148	if (strstr(u, "AC"))
	149	analog.meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	150	if (strstr(u, "DC"))
	151	analog.meaning->mqflags \|= SR_MQFLAG_DC;
	152	if (!is_oor) {
	153	if (e[0] == 'm')
	154	fvalue /= 1e+3;
	155	else if (e[0] == 'u')
	156	fvalue /= 1e+6;
	157	}
	158	} else if ((u = strstr(e, "Hz"))) {
	159	analog.meaning->mq = SR_MQ_FREQUENCY;
	160	analog.meaning->unit = SR_UNIT_HERTZ;
	161	if (e[0] == 'k')
	162	fvalue *= 1e+3;
	163	} else if (!strcmp(e, "%")) {
	164	analog.meaning->mq = SR_MQ_DUTY_CYCLE;
	165	analog.meaning->unit = SR_UNIT_PERCENTAGE;
	166	} else if ((u = strstr(e, "ms"))) {
	167	analog.meaning->mq = SR_MQ_PULSE_WIDTH;
	168	analog.meaning->unit = SR_UNIT_SECOND;
	169	fvalue /= 1e+3;
	170	}
	171
	172	if (analog.meaning->mq != 0) {
	173	/* Got a measurement. */
	174	packet.type = SR_DF_ANALOG;
	175	packet.payload = &analog;
	176	sr_session_send(sdi, &packet);
	177	sr_sw_limits_update_samples_read(&devc->limits, 1);
	178	}
	179	}
	180
	181	static void handle_qm_28x(const struct sr_dev_inst sdi, char *tokens)
	182	{
	183	struct dev_context *devc;
	184	struct sr_datafeed_packet packet;
	185	struct sr_datafeed_analog analog;
	186	struct sr_analog_encoding encoding;
	187	struct sr_analog_meaning meaning;
	188	struct sr_analog_spec spec;
	189	float fvalue;
	190	int digits;
	191
	192	devc = sdi->priv;
	193
	194	if (!tokens[1])
	195	return;
	196
	197	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK) {
	198	sr_err("Invalid float '%s'.", tokens[0]);
	199	return;
	200	}
	201	digits = count_digits(tokens[0]);
	202
	203	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
	204	analog.data = &fvalue;
	205	analog.meaning->channels = sdi->channels;
	206	analog.num_samples = 1;
	207	analog.meaning->mq = 0;
	208
	209	if (!strcmp(tokens[1], "VAC") \|\| !strcmp(tokens[1], "VDC")) {
	210	analog.meaning->mq = SR_MQ_VOLTAGE;
	211	analog.meaning->unit = SR_UNIT_VOLT;
	212	if (!strcmp(tokens[2], "NORMAL")) {
	213	if (tokens[1][1] == 'A') {
	214	analog.meaning->mqflags \|= SR_MQFLAG_AC;
	215	analog.meaning->mqflags \|= SR_MQFLAG_RMS;
	216	} else
	217	analog.meaning->mqflags \|= SR_MQFLAG_DC;
	218	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	219	fvalue = NAN;
	220	} else
	221	analog.meaning->mq = 0;
	222	} else if (!strcmp(tokens[1], "dBV") \|\| !strcmp(tokens[1], "dBm")) {
	223	analog.meaning->mq = SR_MQ_VOLTAGE;
	224	if (tokens[1][2] == 'm')
	225	analog.meaning->unit = SR_UNIT_DECIBEL_MW;
	226	else
	227	analog.meaning->unit = SR_UNIT_DECIBEL_VOLT;
	228	analog.meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
	229	} else if (!strcmp(tokens[1], "CEL") \|\| !strcmp(tokens[1], "FAR")) {
	230	if (!strcmp(tokens[2], "NORMAL")) {
	231	analog.meaning->mq = SR_MQ_TEMPERATURE;
	232	if (tokens[1][0] == 'C')
	233	analog.meaning->unit = SR_UNIT_CELSIUS;
	234	else
	235	analog.meaning->unit = SR_UNIT_FAHRENHEIT;
	236	}
	237	} else if (!strcmp(tokens[1], "OHM")) {
	238	if (!strcmp(tokens[3], "NONE")) {
	239	analog.meaning->mq = SR_MQ_RESISTANCE;
	240	analog.meaning->unit = SR_UNIT_OHM;
	241	if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	242	fvalue = INFINITY;
	243	} else if (strcmp(tokens[2], "NORMAL"))
	244	analog.meaning->mq = 0;
	245	} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
	246	analog.meaning->mq = SR_MQ_CONTINUITY;
	247	analog.meaning->unit = SR_UNIT_BOOLEAN;
	248	fvalue = 0.0;
	249	} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
	250	analog.meaning->mq = SR_MQ_CONTINUITY;
	251	analog.meaning->unit = SR_UNIT_BOOLEAN;
	252	fvalue = 1.0;
	253	}
	254	} else if (!strcmp(tokens[1], "F")
	255	&& !strcmp(tokens[2], "NORMAL")
	256	&& !strcmp(tokens[3], "NONE")) {
	257	analog.meaning->mq = SR_MQ_CAPACITANCE;
	258	analog.meaning->unit = SR_UNIT_FARAD;
	259	} else if (!strcmp(tokens[1], "AAC") \|\| !strcmp(tokens[1], "ADC")) {
	260	analog.meaning->mq = SR_MQ_CURRENT;
	261	analog.meaning->unit = SR_UNIT_AMPERE;
	262	if (!strcmp(tokens[2], "NORMAL")) {
	263	if (tokens[1][1] == 'A') {
	264	analog.meaning->mqflags \|= SR_MQFLAG_AC;
	265	analog.meaning->mqflags \|= SR_MQFLAG_RMS;
	266	} else
	267	analog.meaning->mqflags \|= SR_MQFLAG_DC;
	268	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
	269	fvalue = NAN;
	270	} else
	271	analog.meaning->mq = 0;
	272	} else if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
	273	analog.meaning->mq = SR_MQ_FREQUENCY;
	274	analog.meaning->unit = SR_UNIT_HERTZ;
	275	} else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
	276	analog.meaning->mq = SR_MQ_DUTY_CYCLE;
	277	analog.meaning->unit = SR_UNIT_PERCENTAGE;
	278	} else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
	279	analog.meaning->mq = SR_MQ_PULSE_WIDTH;
	280	analog.meaning->unit = SR_UNIT_SECOND;
	281	} else if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
	282	analog.meaning->mq = SR_MQ_CONDUCTANCE;
	283	analog.meaning->unit = SR_UNIT_SIEMENS;
	284	}
	285
	286	if (analog.meaning->mq != 0) {
	287	/* Got a measurement. */
	288	packet.type = SR_DF_ANALOG;
	289	packet.payload = &analog;
	290	sr_session_send(sdi, &packet);
	291	sr_sw_limits_update_samples_read(&devc->limits, 1);
	292	}
	293	}
	294
	295	static void handle_qm_19x_meta(const struct sr_dev_inst sdi, char *tokens)
	296	{
	297	struct dev_context *devc;
	298	int meas_type, meas_unit, meas_char, i;
	299
	300	/* Make sure we have 7 valid tokens. */
	301	for (i = 0; tokens[i] && i < 7; i++);
	302	if (i != 7)
	303	return;
	304
	305	if (strcmp(tokens[1], "1"))
	306	/* Invalid measurement. */
	307	return;
	308
	309	if (strcmp(tokens[2], "3"))
	310	/* Only interested in input from the meter mode source. */
	311	return;
	312
	313	devc = sdi->priv;
	314
	315	/* Measurement type 11 == absolute, 19 = relative */
	316	meas_type = strtol(tokens[0], NULL, 10);
	317	if (meas_type != 11 && meas_type != 19)
	318	/* Device is in some mode we don't support. */
	319	return;
	320
	321	/* We might get metadata for absolute and relative mode (if the device
	322	* is in relative mode). In that case, relative takes precedence. */
	323	if (meas_type == 11 && devc->meas_type == 19)
	324	return;
	325
	326	meas_unit = strtol(tokens[3], NULL, 10);
	327	if (meas_unit == 0)
	328	/* Device is turned off. Really. */
	329	return;
	330	meas_char = strtol(tokens[4], NULL, 10);
	331
	332	devc->mq = 0;
	333	devc->unit = 0;
	334	devc->mqflags = 0;
	335
	336	switch (meas_unit) {
	337	case 1:
	338	devc->mq = SR_MQ_VOLTAGE;
	339	devc->unit = SR_UNIT_VOLT;
	340	if (meas_char == 1)
	341	devc->mqflags \|= SR_MQFLAG_DC;
	342	else if (meas_char == 2)
	343	devc->mqflags \|= SR_MQFLAG_AC;
	344	else if (meas_char == 3)
	345	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	346	else if (meas_char == 15)
	347	devc->mqflags \|= SR_MQFLAG_DIODE \| SR_MQFLAG_DC;
	348	break;
	349	case 2:
	350	devc->mq = SR_MQ_CURRENT;
	351	devc->unit = SR_UNIT_AMPERE;
	352	if (meas_char == 1)
	353	devc->mqflags \|= SR_MQFLAG_DC;
	354	else if (meas_char == 2)
	355	devc->mqflags \|= SR_MQFLAG_AC;
	356	else if (meas_char == 3)
	357	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	358	break;
	359	case 3:
	360	if (meas_char == 1) {
	361	devc->mq = SR_MQ_RESISTANCE;
	362	devc->unit = SR_UNIT_OHM;
	363	} else if (meas_char == 16) {
	364	devc->mq = SR_MQ_CONTINUITY;
	365	devc->unit = SR_UNIT_BOOLEAN;
	366	}
	367	break;
	368	case 12:
	369	devc->mq = SR_MQ_TEMPERATURE;
	370	devc->unit = SR_UNIT_CELSIUS;
	371	break;
	372	case 13:
	373	devc->mq = SR_MQ_TEMPERATURE;
	374	devc->unit = SR_UNIT_FAHRENHEIT;
	375	break;
	376	default:
	377	sr_dbg("unknown unit: %d", meas_unit);
	378	}
	379	if (devc->mq == 0 && devc->unit == 0)
	380	return;
	381
	382	/* If we got here, we know how to interpret the measurement. */
	383	devc->meas_type = meas_type;
	384	if (meas_type == 11)
	385	/* Absolute meter reading. */
	386	devc->is_relative = FALSE;
	387	else if (!strcmp(tokens[0], "19"))
	388	/* Relative meter reading. */
	389	devc->is_relative = TRUE;
	390
	391	}
	392
	393	static void handle_qm_19x_data(const struct sr_dev_inst sdi, char *tokens)
	394	{
	395	struct dev_context *devc;
	396	struct sr_datafeed_packet packet;
	397	struct sr_datafeed_analog analog;
	398	struct sr_analog_encoding encoding;
	399	struct sr_analog_meaning meaning;
	400	struct sr_analog_spec spec;
	401	float fvalue;
	402	int digits;
	403
	404	digits = 2;
	405	if (!strcmp(tokens[0], "9.9E+37")) {
	406	/* An invalid measurement shows up on the display as "OL", but
	407	* comes through like this. Since comparing 38-digit floats
	408	* is rather problematic, we'll cut through this here. */
	409	fvalue = NAN;
	410	} else {
	411	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK \|\| fvalue == 0.0) {
	412	sr_err("Invalid float '%s'.", tokens[0]);
	413	return;
	414	}
	415	digits = count_digits(tokens[0]);
	416	}
	417
	418	devc = sdi->priv;
	419	if (devc->mq == 0 \|\| devc->unit == 0)
	420	/* Don't have valid metadata yet. */
	421	return;
	422
	423	if (devc->mq == SR_MQ_RESISTANCE && isnan(fvalue))
	424	fvalue = INFINITY;
	425	else if (devc->mq == SR_MQ_CONTINUITY) {
	426	if (isnan(fvalue))
	427	fvalue = 0.0;
	428	else
	429	fvalue = 1.0;
	430	}
	431
	432	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
	433	analog.meaning->channels = sdi->channels;
	434	analog.num_samples = 1;
	435	analog.data = &fvalue;
	436	analog.meaning->mq = devc->mq;
	437	analog.meaning->unit = devc->unit;
	438	analog.meaning->mqflags = 0;
	439	packet.type = SR_DF_ANALOG;
	440	packet.payload = &analog;
	441	sr_session_send(sdi, &packet);
	442
	443	sr_sw_limits_update_samples_read(&devc->limits, 1);
	444	}
	445
	446	static void handle_line(const struct sr_dev_inst *sdi)
	447	{
	448	struct dev_context *devc;
	449	struct sr_serial_dev_inst *serial;
	450	int num_tokens, n, i;
	451	char cmd[16], **tokens;
	452	int ret;
	453
	454	devc = sdi->priv;
	455	serial = sdi->conn;
	456	sr_spew("Received line '%s' (%d).", devc->buf, devc->buflen);
	457
	458	if (devc->buflen == 1) {
	459	if (devc->buf[0] != '0') {
	460	/* Not just a CMD_ACK from the query command. */
	461	sr_dbg("Got CMD_ACK '%c'.", devc->buf[0]);
	462	devc->expect_response = FALSE;
	463	}
	464	devc->buflen = 0;
	465	return;
	466	}
	467
	468	tokens = g_strsplit(devc->buf, ",", 0);
	469	if (tokens[0]) {
	470	switch (devc->profile->model) {
	471	case FLUKE_87:
	472	case FLUKE_89:
	473	case FLUKE_187:
	474	case FLUKE_189:
	475	devc->expect_response = FALSE;
	476	handle_qm_18x(sdi, tokens);
	477	break;
	478	case FLUKE_190:
	479	devc->expect_response = FALSE;
	480	num_tokens = g_strv_length(tokens);
	481	if (num_tokens < 7) {
	482	/* Response to QM <n> measurement request. */
	483	handle_qm_19x_data(sdi, tokens);
	484	break;
	485	}
	486	/*
	487	* Response to QM: This is a comma-separated list of
	488	* fields with metadata about the measurement. This
	489	* format can return multiple sets of metadata,
	490	* split into sets of 7 tokens each.
	491	*/
	492	devc->meas_type = 0;
	493	for (i = 0; i < num_tokens; i += 7)
	494	handle_qm_19x_meta(sdi, tokens + i);
	495	if (devc->meas_type) {
	496	/*
	497	* Slip the request in now, before the main
	498	* timer loop asks for metadata again.
	499	*/
	500	n = sprintf(cmd, "QM %d\r", devc->meas_type);
	501	ret = serial_write_blocking(serial,
	502	cmd, n, SERIAL_WRITE_TIMEOUT_MS);
	503	if (ret < 0)
	504	sr_err("Cannot send QM (measurement).");
	505	}
	506	break;
	507	case FLUKE_287:
	508	case FLUKE_289:
	509	devc->expect_response = FALSE;
	510	handle_qm_28x(sdi, tokens);
	511	break;
	512	}
	513	}
	514	g_strfreev(tokens);
	515	devc->buflen = 0;
	516	}
	517
	518	SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
	519	{
	520	struct sr_dev_inst *sdi;
	521	struct dev_context *devc;
	522	struct sr_serial_dev_inst *serial;
	523	int len;
	524	int64_t now, elapsed;
	525
	526	(void)fd;
	527
	528	if (!(sdi = cb_data))
	529	return TRUE;
	530
	531	if (!(devc = sdi->priv))
	532	return TRUE;
	533
	534	serial = sdi->conn;
	535	if (revents == G_IO_IN) {
	536	/* Serial data arrived. */
	537	while (FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
	538	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
	539	if (len < 1)
	540	break;
	541	devc->buflen++;
	542	*(devc->buf + devc->buflen) = '\0';
	543	if (*(devc->buf + devc->buflen - 1) == '\r') {
	544	*(devc->buf + --devc->buflen) = '\0';
	545	handle_line(sdi);
	546	break;
	547	}
	548	}
	549	}
	550
	551	if (sr_sw_limits_check(&devc->limits)) {
	552	sr_dev_acquisition_stop(sdi);
	553	return TRUE;
	554	}
	555
	556	now = g_get_monotonic_time() / 1000;
	557	elapsed = now - devc->cmd_sent_at;
	558	/* Send query command at poll_period interval, or after 1 second
	559	* has elapsed. This will make it easier to recover from any
	560	* out-of-sync or temporary disconnect issues. */
	561	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
	562	\|\| elapsed > devc->profile->timeout) {
	563	if (serial_write_blocking(serial, "QM\r", 3, SERIAL_WRITE_TIMEOUT_MS) < 0)
	564	sr_err("Unable to send QM.");
	565	devc->cmd_sent_at = now;
	566	devc->expect_response = TRUE;
	567	}
	568
	569	return TRUE;
	570	}