[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;

	if (*str == '-' || *str == '+')
		str++;

	while (*str >= '0' && *str <= '9')
		str++;

	digits = 0;
	if (*str == '.') {
		str++;
		while (*str >= '0' && *str <= '9') {
			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;
	int exponent;
	enum sr_mq mq;
	enum sr_unit unit;
	enum sr_mqflag mqflags;

	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++;

	if (is_oor)
		fvalue = NAN;

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

	if (mq != 0) {
		/* Got a measurement. */
		digits -= exponent;
		fvalue *= pow(10.0f, exponent);

		sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
		analog.data = &fvalue;
		analog.num_samples = 1;
		analog.meaning->unit = unit;
		analog.meaning->mq = mq;
		analog.meaning->mqflags = mqflags;
		analog.meaning->channels = sdi->channels;

		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
d38d2ef0	1	/*
50985c20	2	* This file is part of the libsigrok project.
d38d2ef0 BV	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
6ec6c43b	20	#include <config.h>
d38d2ef0 BV	21	#include <stdlib.h>
	22	#include <math.h>
	23	#include <string.h>
4cea0ff7	24	#include <glib.h>
c1aae900	25	#include <libsigrok/libsigrok.h>
4cea0ff7	26	#include "libsigrok-internal.h"
2cb232a9	27	#include "protocol.h"
d38d2ef0	28
d9a026ea MP	29	static int count_digits(const char *str)
d9a026ea MP	30	{
d2e3ce76 MP	31	int digits;
d2e3ce76 MP	32
d9a026ea MP	33	if (str == '-' \|\| str == '+')
	34	str++;
	35
	36	while (str >= '0' && str <= '9')
d2e3ce76 MP	37	str++;
	38
	39	digits = 0;
	40	if (*str == '.') {
	41	str++;
d9a026ea	42	while (str >= '0' && str <= '9') {
d2e3ce76 MP	43	str++;
	44	digits++;
	45	}
	46	}
	47
	48	return digits;
	49	}
	50
19ab8e36	51	static void handle_qm_18x(const struct sr_dev_inst sdi, char *tokens)
fe31f8b9	52	{
19ab8e36 AS	53	struct dev_context *devc;
	54	struct sr_datafeed_packet packet;
	55	struct sr_datafeed_analog analog;
3f5cf2a0 UH	56	struct sr_analog_encoding encoding;
	57	struct sr_analog_meaning meaning;
	58	struct sr_analog_spec spec;
fe31f8b9 BV	59	float fvalue;
	60	char e, u;
	61	gboolean is_oor;
d2e3ce76	62	int digits;
104c7d56 MP	63	int exponent;
	64	enum sr_mq mq;
	65	enum sr_unit unit;
	66	enum sr_mqflag mqflags;
fe31f8b9	67
19ab8e36 AS	68	devc = sdi->priv;
19ab8e36 AS	69
4cea0ff7	70	if (strcmp(tokens[0], "QM") \|\| !tokens[1])
19ab8e36	71	return;
fe31f8b9 BV	72
	73	if ((e = strstr(tokens[1], "Out of range"))) {
	74	is_oor = TRUE;
	75	fvalue = -1;
d2e3ce76	76	digits = 0;
0c5f2abc	77	while (e && e != '.')
357e341d	78	e++;
fe31f8b9 BV	79	} else {
fe31f8b9 BV	80	is_oor = FALSE;
357e341d BV	81	/* Delimit the float, since sr_atof_ascii() wants only
	82	* a valid float here. */
	83	e = tokens[1];
0c5f2abc	84	while (e && e != ' ')
357e341d BV	85	e++;
357e341d BV	86	*e++ = '\0';
ad42cfeb	87	if (sr_atof_ascii(tokens[1], &fvalue) != SR_OK) {
fe31f8b9	88	/* Happens all the time, when switching modes. */
e7f803f3	89	sr_dbg("Invalid float: '%s'", tokens[1]);
19ab8e36	90	return;
fe31f8b9	91	}
d2e3ce76	92	digits = count_digits(tokens[1]);
fe31f8b9	93	}
0c5f2abc	94	while (e && e == ' ')
fe31f8b9 BV	95	e++;
fe31f8b9 BV	96
fe31f8b9	97	if (is_oor)
19ab8e36	98	fvalue = NAN;
fe31f8b9	99
104c7d56 MP	100	mq = 0;
	101	unit = 0;
	102	exponent = 0;
	103	mqflags = 0;
fe31f8b9	104	if ((u = strstr(e, "V DC")) \|\| (u = strstr(e, "V AC"))) {
104c7d56 MP	105	mq = SR_MQ_VOLTAGE;
104c7d56 MP	106	unit = SR_UNIT_VOLT;
fe31f8b9	107	if (!is_oor && e[0] == 'm')
104c7d56	108	exponent = -3;
fe31f8b9 BV	109	/* This catches "V AC", "V DC" and "V AC+DC". */
fe31f8b9 BV	110	if (strstr(u, "AC"))
104c7d56	111	mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
fe31f8b9	112	if (strstr(u, "DC"))
104c7d56	113	mqflags \|= SR_MQFLAG_DC;
fe31f8b9	114	} else if ((u = strstr(e, "dBV")) \|\| (u = strstr(e, "dBm"))) {
104c7d56	115	mq = SR_MQ_VOLTAGE;
fe31f8b9	116	if (u[2] == 'm')
104c7d56	117	unit = SR_UNIT_DECIBEL_MW;
fe31f8b9	118	else
104c7d56 MP	119	unit = SR_UNIT_DECIBEL_VOLT;
104c7d56 MP	120	mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
fe31f8b9	121	} else if ((u = strstr(e, "Ohms"))) {
104c7d56 MP	122	mq = SR_MQ_RESISTANCE;
104c7d56 MP	123	unit = SR_UNIT_OHM;
fe31f8b9	124	if (is_oor)
19ab8e36	125	fvalue = INFINITY;
fe31f8b9	126	else if (e[0] == 'k')
104c7d56	127	exponent = 3;
fe31f8b9	128	else if (e[0] == 'M')
104c7d56	129	exponent = 6;
fe31f8b9	130	} else if (!strcmp(e, "nS")) {
104c7d56 MP	131	mq = SR_MQ_CONDUCTANCE;
	132	unit = SR_UNIT_SIEMENS;
	133	exponent = -9;
fe31f8b9	134	} else if ((u = strstr(e, "Farads"))) {
104c7d56 MP	135	mq = SR_MQ_CAPACITANCE;
104c7d56 MP	136	unit = SR_UNIT_FARAD;
fe31f8b9 BV	137	if (!is_oor) {
fe31f8b9 BV	138	if (e[0] == 'm')
104c7d56	139	exponent = -3;
fe31f8b9	140	else if (e[0] == 'u')
104c7d56	141	exponent = -6;
fe31f8b9	142	else if (e[0] == 'n')
104c7d56	143	exponent = -9;
fe31f8b9 BV	144	}
fe31f8b9 BV	145	} else if ((u = strstr(e, "Deg C")) \|\| (u = strstr(e, "Deg F"))) {
104c7d56	146	mq = SR_MQ_TEMPERATURE;
fe31f8b9	147	if (u[4] == 'C')
104c7d56	148	unit = SR_UNIT_CELSIUS;
fe31f8b9	149	else
104c7d56	150	unit = SR_UNIT_FAHRENHEIT;
fe31f8b9	151	} else if ((u = strstr(e, "A AC")) \|\| (u = strstr(e, "A DC"))) {
104c7d56 MP	152	mq = SR_MQ_CURRENT;
104c7d56 MP	153	unit = SR_UNIT_AMPERE;
fe31f8b9 BV	154	/* This catches "A AC", "A DC" and "A AC+DC". */
fe31f8b9 BV	155	if (strstr(u, "AC"))
104c7d56	156	mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
fe31f8b9	157	if (strstr(u, "DC"))
104c7d56	158	mqflags \|= SR_MQFLAG_DC;
fe31f8b9 BV	159	if (!is_oor) {
fe31f8b9 BV	160	if (e[0] == 'm')
104c7d56	161	exponent = -3;
fe31f8b9	162	else if (e[0] == 'u')
104c7d56	163	exponent = -6;
fe31f8b9 BV	164	}
fe31f8b9 BV	165	} else if ((u = strstr(e, "Hz"))) {
104c7d56 MP	166	mq = SR_MQ_FREQUENCY;
104c7d56 MP	167	unit = SR_UNIT_HERTZ;
fe31f8b9	168	if (e[0] == 'k')
104c7d56	169	exponent = 3;
fe31f8b9	170	} else if (!strcmp(e, "%")) {
104c7d56 MP	171	mq = SR_MQ_DUTY_CYCLE;
104c7d56 MP	172	unit = SR_UNIT_PERCENTAGE;
fe31f8b9	173	} else if ((u = strstr(e, "ms"))) {
104c7d56 MP	174	mq = SR_MQ_PULSE_WIDTH;
	175	unit = SR_UNIT_SECOND;
	176	exponent = -3;
fe31f8b9 BV	177	}
fe31f8b9 BV	178
104c7d56	179	if (mq != 0) {
19ab8e36	180	/* Got a measurement. */
104c7d56 MP	181	digits -= exponent;
	182	fvalue *= pow(10.0f, exponent);
	183
	184	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
	185	analog.data = &fvalue;
	186	analog.num_samples = 1;
	187	analog.meaning->unit = unit;
	188	analog.meaning->mq = mq;
	189	analog.meaning->mqflags = mqflags;
	190	analog.meaning->channels = sdi->channels;
	191
19ab8e36 AS	192	packet.type = SR_DF_ANALOG;
	193	packet.payload = &analog;
	194	sr_session_send(sdi, &packet);
	195	sr_sw_limits_update_samples_read(&devc->limits, 1);
fe31f8b9	196	}
fe31f8b9 BV	197	}
fe31f8b9 BV	198
19ab8e36	199	static void handle_qm_28x(const struct sr_dev_inst sdi, char *tokens)
d38d2ef0	200	{
19ab8e36 AS	201	struct dev_context *devc;
	202	struct sr_datafeed_packet packet;
	203	struct sr_datafeed_analog analog;
3f5cf2a0 UH	204	struct sr_analog_encoding encoding;
	205	struct sr_analog_meaning meaning;
	206	struct sr_analog_spec spec;
d38d2ef0	207	float fvalue;
d2e3ce76	208	int digits;
d38d2ef0	209
19ab8e36 AS	210	devc = sdi->priv;
19ab8e36 AS	211
4cea0ff7	212	if (!tokens[1])
19ab8e36	213	return;
4cea0ff7	214
ad42cfeb	215	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK) {
357e341d	216	sr_err("Invalid float '%s'.", tokens[0]);
19ab8e36	217	return;
d38d2ef0	218	}
d2e3ce76	219	digits = count_digits(tokens[0]);
d38d2ef0	220
d2e3ce76	221	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
19ab8e36 AS	222	analog.data = &fvalue;
	223	analog.meaning->channels = sdi->channels;
	224	analog.num_samples = 1;
	225	analog.meaning->mq = 0;
d38d2ef0 BV	226
d38d2ef0 BV	227	if (!strcmp(tokens[1], "VAC") \|\| !strcmp(tokens[1], "VDC")) {
19ab8e36 AS	228	analog.meaning->mq = SR_MQ_VOLTAGE;
19ab8e36 AS	229	analog.meaning->unit = SR_UNIT_VOLT;
d38d2ef0 BV	230	if (!strcmp(tokens[2], "NORMAL")) {
d38d2ef0 BV	231	if (tokens[1][1] == 'A') {
19ab8e36 AS	232	analog.meaning->mqflags \|= SR_MQFLAG_AC;
19ab8e36 AS	233	analog.meaning->mqflags \|= SR_MQFLAG_RMS;
d38d2ef0	234	} else
19ab8e36	235	analog.meaning->mqflags \|= SR_MQFLAG_DC;
d38d2ef0	236	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
19ab8e36	237	fvalue = NAN;
d38d2ef0	238	} else
19ab8e36	239	analog.meaning->mq = 0;
a28dac0a	240	} else if (!strcmp(tokens[1], "dBV") \|\| !strcmp(tokens[1], "dBm")) {
19ab8e36	241	analog.meaning->mq = SR_MQ_VOLTAGE;
2c04dede	242	if (tokens[1][2] == 'm')
19ab8e36	243	analog.meaning->unit = SR_UNIT_DECIBEL_MW;
2c04dede	244	else
19ab8e36 AS	245	analog.meaning->unit = SR_UNIT_DECIBEL_VOLT;
19ab8e36 AS	246	analog.meaning->mqflags \|= SR_MQFLAG_AC \| SR_MQFLAG_RMS;
a28dac0a	247	} else if (!strcmp(tokens[1], "CEL") \|\| !strcmp(tokens[1], "FAR")) {
d38d2ef0	248	if (!strcmp(tokens[2], "NORMAL")) {
19ab8e36	249	analog.meaning->mq = SR_MQ_TEMPERATURE;
d38d2ef0	250	if (tokens[1][0] == 'C')
19ab8e36	251	analog.meaning->unit = SR_UNIT_CELSIUS;
d38d2ef0	252	else
19ab8e36	253	analog.meaning->unit = SR_UNIT_FAHRENHEIT;
d38d2ef0	254	}
a28dac0a	255	} else if (!strcmp(tokens[1], "OHM")) {
d38d2ef0	256	if (!strcmp(tokens[3], "NONE")) {
19ab8e36 AS	257	analog.meaning->mq = SR_MQ_RESISTANCE;
19ab8e36 AS	258	analog.meaning->unit = SR_UNIT_OHM;
d38d2ef0	259	if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
19ab8e36	260	fvalue = INFINITY;
d38d2ef0	261	} else if (strcmp(tokens[2], "NORMAL"))
19ab8e36	262	analog.meaning->mq = 0;
d38d2ef0	263	} else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) {
19ab8e36 AS	264	analog.meaning->mq = SR_MQ_CONTINUITY;
	265	analog.meaning->unit = SR_UNIT_BOOLEAN;
	266	fvalue = 0.0;
d38d2ef0	267	} else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) {
19ab8e36 AS	268	analog.meaning->mq = SR_MQ_CONTINUITY;
	269	analog.meaning->unit = SR_UNIT_BOOLEAN;
	270	fvalue = 1.0;
d38d2ef0	271	}
a28dac0a	272	} else if (!strcmp(tokens[1], "F")
d38d2ef0 BV	273	&& !strcmp(tokens[2], "NORMAL")
d38d2ef0 BV	274	&& !strcmp(tokens[3], "NONE")) {
19ab8e36 AS	275	analog.meaning->mq = SR_MQ_CAPACITANCE;
19ab8e36 AS	276	analog.meaning->unit = SR_UNIT_FARAD;
d38d2ef0	277	} else if (!strcmp(tokens[1], "AAC") \|\| !strcmp(tokens[1], "ADC")) {
19ab8e36 AS	278	analog.meaning->mq = SR_MQ_CURRENT;
19ab8e36 AS	279	analog.meaning->unit = SR_UNIT_AMPERE;
d38d2ef0 BV	280	if (!strcmp(tokens[2], "NORMAL")) {
d38d2ef0 BV	281	if (tokens[1][1] == 'A') {
19ab8e36 AS	282	analog.meaning->mqflags \|= SR_MQFLAG_AC;
19ab8e36 AS	283	analog.meaning->mqflags \|= SR_MQFLAG_RMS;
d38d2ef0	284	} else
19ab8e36	285	analog.meaning->mqflags \|= SR_MQFLAG_DC;
d38d2ef0	286	} else if (!strcmp(tokens[2], "OL") \|\| !strcmp(tokens[2], "OL_MINUS")) {
19ab8e36	287	fvalue = NAN;
d38d2ef0	288	} else
19ab8e36 AS	289	analog.meaning->mq = 0;
	290	} else if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) {
	291	analog.meaning->mq = SR_MQ_FREQUENCY;
	292	analog.meaning->unit = SR_UNIT_HERTZ;
a28dac0a	293	} else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) {
19ab8e36 AS	294	analog.meaning->mq = SR_MQ_DUTY_CYCLE;
19ab8e36 AS	295	analog.meaning->unit = SR_UNIT_PERCENTAGE;
a28dac0a	296	} else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) {
19ab8e36 AS	297	analog.meaning->mq = SR_MQ_PULSE_WIDTH;
19ab8e36 AS	298	analog.meaning->unit = SR_UNIT_SECOND;
a28dac0a	299	} else if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) {
19ab8e36 AS	300	analog.meaning->mq = SR_MQ_CONDUCTANCE;
19ab8e36 AS	301	analog.meaning->unit = SR_UNIT_SIEMENS;
d38d2ef0 BV	302	}
d38d2ef0 BV	303
19ab8e36 AS	304	if (analog.meaning->mq != 0) {
	305	/* Got a measurement. */
	306	packet.type = SR_DF_ANALOG;
	307	packet.payload = &analog;
	308	sr_session_send(sdi, &packet);
	309	sr_sw_limits_update_samples_read(&devc->limits, 1);
d38d2ef0	310	}
d38d2ef0 BV	311	}
d38d2ef0 BV	312
11fb7110 BV	313	static void handle_qm_19x_meta(const struct sr_dev_inst sdi, char *tokens)
	314	{
	315	struct dev_context *devc;
	316	int meas_type, meas_unit, meas_char, i;
	317
	318	/* Make sure we have 7 valid tokens. */
	319	for (i = 0; tokens[i] && i < 7; i++);
	320	if (i != 7)
	321	return;
	322
	323	if (strcmp(tokens[1], "1"))
	324	/* Invalid measurement. */
	325	return;
	326
	327	if (strcmp(tokens[2], "3"))
	328	/* Only interested in input from the meter mode source. */
	329	return;
	330
	331	devc = sdi->priv;
	332
	333	/* Measurement type 11 == absolute, 19 = relative */
	334	meas_type = strtol(tokens[0], NULL, 10);
	335	if (meas_type != 11 && meas_type != 19)
	336	/* Device is in some mode we don't support. */
	337	return;
	338
	339	/* We might get metadata for absolute and relative mode (if the device
	340	* is in relative mode). In that case, relative takes precedence. */
	341	if (meas_type == 11 && devc->meas_type == 19)
	342	return;
	343
	344	meas_unit = strtol(tokens[3], NULL, 10);
	345	if (meas_unit == 0)
	346	/* Device is turned off. Really. */
	347	return;
	348	meas_char = strtol(tokens[4], NULL, 10);
	349
55ec0b67 UH	350	devc->mq = 0;
	351	devc->unit = 0;
	352	devc->mqflags = 0;
	353
11fb7110 BV	354	switch (meas_unit) {
	355	case 1:
	356	devc->mq = SR_MQ_VOLTAGE;
	357	devc->unit = SR_UNIT_VOLT;
	358	if (meas_char == 1)
	359	devc->mqflags \|= SR_MQFLAG_DC;
	360	else if (meas_char == 2)
	361	devc->mqflags \|= SR_MQFLAG_AC;
	362	else if (meas_char == 3)
	363	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	364	else if (meas_char == 15)
64aa214a	365	devc->mqflags \|= SR_MQFLAG_DIODE \| SR_MQFLAG_DC;
11fb7110 BV	366	break;
	367	case 2:
	368	devc->mq = SR_MQ_CURRENT;
	369	devc->unit = SR_UNIT_AMPERE;
	370	if (meas_char == 1)
	371	devc->mqflags \|= SR_MQFLAG_DC;
	372	else if (meas_char == 2)
	373	devc->mqflags \|= SR_MQFLAG_AC;
	374	else if (meas_char == 3)
	375	devc->mqflags \|= SR_MQFLAG_DC \| SR_MQFLAG_AC;
	376	break;
	377	case 3:
	378	if (meas_char == 1) {
	379	devc->mq = SR_MQ_RESISTANCE;
	380	devc->unit = SR_UNIT_OHM;
	381	} else if (meas_char == 16) {
	382	devc->mq = SR_MQ_CONTINUITY;
	383	devc->unit = SR_UNIT_BOOLEAN;
	384	}
	385	break;
	386	case 12:
	387	devc->mq = SR_MQ_TEMPERATURE;
	388	devc->unit = SR_UNIT_CELSIUS;
	389	break;
	390	case 13:
	391	devc->mq = SR_MQ_TEMPERATURE;
	392	devc->unit = SR_UNIT_FAHRENHEIT;
	393	break;
	394	default:
	395	sr_dbg("unknown unit: %d", meas_unit);
	396	}
3f5cf2a0	397	if (devc->mq == 0 && devc->unit == 0)
11fb7110 BV	398	return;
	399
	400	/* If we got here, we know how to interpret the measurement. */
	401	devc->meas_type = meas_type;
	402	if (meas_type == 11)
	403	/* Absolute meter reading. */
	404	devc->is_relative = FALSE;
	405	else if (!strcmp(tokens[0], "19"))
	406	/* Relative meter reading. */
	407	devc->is_relative = TRUE;
	408
	409	}
	410
	411	static void handle_qm_19x_data(const struct sr_dev_inst sdi, char *tokens)
	412	{
	413	struct dev_context *devc;
	414	struct sr_datafeed_packet packet;
3f5cf2a0 UH	415	struct sr_datafeed_analog analog;
	416	struct sr_analog_encoding encoding;
	417	struct sr_analog_meaning meaning;
	418	struct sr_analog_spec spec;
11fb7110	419	float fvalue;
d2e3ce76	420	int digits;
11fb7110	421
d2e3ce76	422	digits = 2;
11fb7110 BV	423	if (!strcmp(tokens[0], "9.9E+37")) {
	424	/* An invalid measurement shows up on the display as "OL", but
	425	* comes through like this. Since comparing 38-digit floats
	426	* is rather problematic, we'll cut through this here. */
	427	fvalue = NAN;
	428	} else {
357e341d	429	if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK \|\| fvalue == 0.0) {
11fb7110 BV	430	sr_err("Invalid float '%s'.", tokens[0]);
	431	return;
	432	}
d2e3ce76	433	digits = count_digits(tokens[0]);
11fb7110 BV	434	}
	435
	436	devc = sdi->priv;
3f5cf2a0	437	if (devc->mq == 0 \|\| devc->unit == 0)
11fb7110 BV	438	/* Don't have valid metadata yet. */
	439	return;
	440
11fb7110 BV	441	if (devc->mq == SR_MQ_RESISTANCE && isnan(fvalue))
	442	fvalue = INFINITY;
	443	else if (devc->mq == SR_MQ_CONTINUITY) {
	444	if (isnan(fvalue))
	445	fvalue = 0.0;
	446	else
	447	fvalue = 1.0;
	448	}
	449
d2e3ce76	450	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
3f5cf2a0	451	analog.meaning->channels = sdi->channels;
11fb7110 BV	452	analog.num_samples = 1;
11fb7110 BV	453	analog.data = &fvalue;
3f5cf2a0 UH	454	analog.meaning->mq = devc->mq;
	455	analog.meaning->unit = devc->unit;
	456	analog.meaning->mqflags = 0;
	457	packet.type = SR_DF_ANALOG;
11fb7110	458	packet.payload = &analog;
695dc859	459	sr_session_send(sdi, &packet);
11fb7110	460
6aacf011	461	sr_sw_limits_update_samples_read(&devc->limits, 1);
11fb7110 BV	462	}
11fb7110 BV	463
d38d2ef0 BV	464	static void handle_line(const struct sr_dev_inst *sdi)
	465	{
	466	struct dev_context *devc;
919681f0	467	struct sr_serial_dev_inst *serial;
11fb7110 BV	468	int num_tokens, n, i;
11fb7110 BV	469	char cmd[16], **tokens;
ebf6aa30	470	int ret;
d38d2ef0 BV	471
d38d2ef0 BV	472	devc = sdi->priv;
919681f0	473	serial = sdi->conn;
31d84da3	474	sr_spew("Received line '%s' (%d).", devc->buf, devc->buflen);
d38d2ef0 BV	475
	476	if (devc->buflen == 1) {
	477	if (devc->buf[0] != '0') {
	478	/* Not just a CMD_ACK from the query command. */
31d84da3	479	sr_dbg("Got CMD_ACK '%c'.", devc->buf[0]);
d38d2ef0 BV	480	devc->expect_response = FALSE;
	481	}
	482	devc->buflen = 0;
	483	return;
	484	}
	485
d38d2ef0	486	tokens = g_strsplit(devc->buf, ",", 0);
4cea0ff7	487	if (tokens[0]) {
ebf6aa30 GS	488	switch (devc->profile->model) {
	489	case FLUKE_87:
	490	case FLUKE_89:
	491	case FLUKE_187:
	492	case FLUKE_189:
fe31f8b9	493	devc->expect_response = FALSE;
19ab8e36	494	handle_qm_18x(sdi, tokens);
ebf6aa30	495	break;
ebf6aa30	496	case FLUKE_190:
11fb7110	497	devc->expect_response = FALSE;
ebf6aa30 GS	498	num_tokens = g_strv_length(tokens);
ebf6aa30 GS	499	if (num_tokens < 7) {
11fb7110 BV	500	/* Response to QM <n> measurement request. */
11fb7110 BV	501	handle_qm_19x_data(sdi, tokens);
ebf6aa30	502	break;
11fb7110	503	}
ebf6aa30 GS	504	/*
	505	* Response to QM: This is a comma-separated list of
	506	* fields with metadata about the measurement. This
	507	* format can return multiple sets of metadata,
	508	* split into sets of 7 tokens each.
	509	*/
	510	devc->meas_type = 0;
	511	for (i = 0; i < num_tokens; i += 7)
	512	handle_qm_19x_meta(sdi, tokens + i);
	513	if (devc->meas_type) {
	514	/*
	515	* Slip the request in now, before the main
	516	* timer loop asks for metadata again.
	517	*/
	518	n = sprintf(cmd, "QM %d\r", devc->meas_type);
	519	ret = serial_write_blocking(serial,
	520	cmd, n, SERIAL_WRITE_TIMEOUT_MS);
	521	if (ret < 0)
	522	sr_err("Cannot send QM (measurement).");
	523	}
	524	break;
0d68d6ba GS	525	case FLUKE_287:
	526	case FLUKE_289:
	527	devc->expect_response = FALSE;
	528	handle_qm_28x(sdi, tokens);
	529	break;
d38d2ef0	530	}
d38d2ef0 BV	531	}
	532	g_strfreev(tokens);
	533	devc->buflen = 0;
d38d2ef0 BV	534	}
	535
	536	SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data)
	537	{
642e9d62	538	struct sr_dev_inst *sdi;
d38d2ef0	539	struct dev_context *devc;
919681f0	540	struct sr_serial_dev_inst *serial;
d38d2ef0 BV	541	int len;
	542	int64_t now, elapsed;
	543
58d03f03 BV	544	(void)fd;
58d03f03 BV	545
d38d2ef0 BV	546	if (!(sdi = cb_data))
	547	return TRUE;
	548
	549	if (!(devc = sdi->priv))
	550	return TRUE;
	551
919681f0	552	serial = sdi->conn;
d38d2ef0 BV	553	if (revents == G_IO_IN) {
d38d2ef0 BV	554	/* Serial data arrived. */
0c5f2abc	555	while (FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) {
707fa85a	556	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
d38d2ef0 BV	557	if (len < 1)
	558	break;
	559	devc->buflen++;
	560	*(devc->buf + devc->buflen) = '\0';
	561	if (*(devc->buf + devc->buflen - 1) == '\r') {
	562	*(devc->buf + --devc->buflen) = '\0';
	563	handle_line(sdi);
	564	break;
	565	}
	566	}
	567	}
	568
6aacf011	569	if (sr_sw_limits_check(&devc->limits)) {
d2f7c417	570	sr_dev_acquisition_stop(sdi);
d38d2ef0 BV	571	return TRUE;
	572	}
	573
	574	now = g_get_monotonic_time() / 1000;
	575	elapsed = now - devc->cmd_sent_at;
	576	/* Send query command at poll_period interval, or after 1 second
d4b11de0 BV	577	* has elapsed. This will make it easier to recover from any
d4b11de0 BV	578	* out-of-sync or temporary disconnect issues. */
d38d2ef0	579	if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period)
d4b11de0	580	\|\| elapsed > devc->profile->timeout) {
20401400	581	if (serial_write_blocking(serial, "QM\r", 3, SERIAL_WRITE_TIMEOUT_MS) < 0)
bb27c765	582	sr_err("Unable to send QM.");
d38d2ef0 BV	583	devc->cmd_sent_at = now;
	584	devc->expect_response = TRUE;
	585	}
	586
	587	return TRUE;
	588	}