[libsigrok.git] / src / hardware / norma-dmm / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
 *
 * 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 "protocol.h"

#define LINE_LENGTH 20

SR_PRIV const struct nmadmm_req nmadmm_requests[] = {
	{ NMADMM_REQ_IDN, "IDN?" },
	{ NMADMM_REQ_IDN, "STATUS?" },
	ALL_ZERO
};

static int nma_send_req(const struct sr_dev_inst *sdi, int req, char *params)
{
	struct sr_serial_dev_inst *serial;
	struct dev_context *devc;
	char buf[NMADMM_BUFSIZE];
	int len;

	if (!sdi || !(serial = sdi->conn) || !(devc = sdi->priv))
		return SR_ERR_BUG;

	len = snprintf(buf, sizeof(buf), "%s%s\r\n",
		nmadmm_requests[req].req_str, params ? params : "");

	sr_spew("Sending request: '%s'.", buf);

	devc->last_req = req;
	devc->last_req_pending = TRUE;

	if (serial_write_blocking(serial, buf, len,
			serial_timeout(serial, len)) < 0) {
		sr_err("Unable to send request.");
		devc->last_req_pending = FALSE;
		return SR_ERR;
	}

	devc->req_sent_at = g_get_monotonic_time();

	return SR_OK;
}

/**
 * Convert hexadecimal digit to int.
 *
 * @param[in] xgit Hexadecimal digit to convert.
 * @return Int value of xgit (0 on invalid xgit).
 */
SR_PRIV int xgittoint(char xgit)
{
	if ((xgit >= '0') && (xgit <= '9'))
		return xgit - '0';
	xgit = tolower(xgit);
	if ((xgit >= 'a') && (xgit <= 'f'))
		return xgit - 'a';
	return 0;
}

/**
 * Process received line. It consists of 20 hex digits + \\r\\n,
 * e.g. '08100400018100400000'.
 */
static void nma_process_line(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	int pos, flags;
	int vt, range;	/* Measurement value type, range in device format */
	int mmode, devstat;	/* Measuring mode, device status */
	float value;	/* Measured value */
	float scale;	/* Scaling factor depending on range and function */
	struct sr_datafeed_analog analog;
	struct sr_analog_encoding encoding;
	struct sr_analog_meaning meaning;
	struct sr_analog_spec spec;
	struct sr_datafeed_packet packet;

	devc = sdi->priv;

	devc->buf[LINE_LENGTH] = '\0';

	sr_spew("Received line '%s'.", devc->buf);

	/* Check line. */
	if (strlen((const char *)devc->buf) != LINE_LENGTH) {
		sr_err("line: Invalid status '%s', must be 20 hex digits.",
		       devc->buf);
		devc->buflen = 0;
		return;
	}

	for (pos = 0; pos < LINE_LENGTH; pos++) {
		if (!isxdigit(devc->buf[pos])) {
			sr_err("line: Expected hex digit in '%s' at pos %d!",
				devc->buf, pos);
			devc->buflen = 0;
			return;
		}
	}

	/* Start decoding. */
	value = 0.0;
	scale = 1.0;
	/* TODO: Use proper 'digits' value for this device (and its modes). */
	sr_analog_init(&analog, &encoding, &meaning, &spec, 2);

	/*
	 * The numbers are hex digits, starting from 0.
	 * 0: Keyboard status, currently not interesting.
	 * 1: Central switch status, currently not interesting.
	 * 2: Type of measured value.
	 */
	vt = xgittoint(devc->buf[2]);
	switch (vt) {
	case 0:
		analog.meaning->mq = SR_MQ_VOLTAGE;
		break;
	case 1:
		analog.meaning->mq = SR_MQ_CURRENT;	/* 2A */
		break;
	case 2:
		analog.meaning->mq = SR_MQ_RESISTANCE;
		break;
	case 3:
		analog.meaning->mq = SR_MQ_CAPACITANCE;
		break;
	case 4:
		analog.meaning->mq = SR_MQ_TEMPERATURE;
		break;
	case 5:
		analog.meaning->mq = SR_MQ_FREQUENCY;
		break;
	case 6:
		analog.meaning->mq = SR_MQ_CURRENT;	/* 10A */
		break;
	case 7:
		analog.meaning->mq = SR_MQ_GAIN;		/* TODO: Scale factor */
		break;
	case 8:
		analog.meaning->mq = SR_MQ_GAIN;		/* Percentage */
		scale /= 100.0;
		break;
	case 9:
		analog.meaning->mq = SR_MQ_GAIN;		/* dB */
		scale /= 100.0;
		break;
	default:
		sr_err("Unknown value type: 0x%02x.", vt);
		break;
	}

	/* 3: Measurement range for measured value */
	range = xgittoint(devc->buf[3]);
	switch (vt) {
	case 0: /* V */
		scale *= pow(10.0, range - 5);
		break;
	case 1: /* A */
		scale *= pow(10.0, range - 7);
		break;
	case 2: /* Ω */
		scale *= pow(10.0, range - 2);
		break;
	case 3: /* F */
		scale *= pow(10.0, range - 12);
		break;
	case 4: /* °C */
		scale *= pow(10.0, range - 1);
		break;
	case 5: /* Hz */
		scale *= pow(10.0, range - 2);
		break;
	// No default, other value types have fixed display format.
	}

	/* 5: Sign and 1st digit */
	flags = xgittoint(devc->buf[5]);
	value = (flags & 0x03);
	if (flags & 0x04)
		scale *= -1;

	/* 6-9: 2nd-4th digit */
	for (pos = 6; pos < 10; pos++)
		value = value * 10 + xgittoint(devc->buf[pos]);
	value *= scale;

	/* 10: Display counter */
	mmode = xgittoint(devc->buf[10]);
	switch (mmode) {
	case 0: /* Frequency */
		analog.meaning->unit = SR_UNIT_HERTZ;
		break;
	case 1: /* V TRMS, only type 5 */
		analog.meaning->unit = SR_UNIT_VOLT;
		analog.meaning->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
		break;
	case 2: /* V AC */
		analog.meaning->unit = SR_UNIT_VOLT;
		analog.meaning->mqflags |= SR_MQFLAG_AC;
		if (devc->type >= 3)
			analog.meaning->mqflags |= SR_MQFLAG_RMS;
		break;
	case 3: /* V DC */
		analog.meaning->unit = SR_UNIT_VOLT;
		analog.meaning->mqflags |= SR_MQFLAG_DC;
		break;
	case 4: /* Ohm */
		analog.meaning->unit = SR_UNIT_OHM;
		break;
	case 5: /* Continuity */
		analog.meaning->unit = SR_UNIT_BOOLEAN;
		analog.meaning->mq = SR_MQ_CONTINUITY;
		/* TODO: Continuity handling is a bit odd in libsigrok. */
		break;
	case 6: /* Degree Celsius */
		analog.meaning->unit = SR_UNIT_CELSIUS;
		break;
	case 7: /* Capacity */
		analog.meaning->unit = SR_UNIT_FARAD;
		break;
	case 8: /* Current DC */
		analog.meaning->unit = SR_UNIT_AMPERE;
		analog.meaning->mqflags |= SR_MQFLAG_DC;
		break;
	case 9: /* Current AC */
		analog.meaning->unit = SR_UNIT_AMPERE;
		analog.meaning->mqflags |= SR_MQFLAG_AC;
		if (devc->type >= 3)
			analog.meaning->mqflags |= SR_MQFLAG_RMS;
		break;
	case 0xa: /* Current TRMS, only type 5 */
		analog.meaning->unit = SR_UNIT_AMPERE;
		analog.meaning->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
		break;
	case 0xb: /* Diode */
		analog.meaning->unit = SR_UNIT_VOLT;
		analog.meaning->mqflags |= (SR_MQFLAG_DIODE | SR_MQFLAG_DC);
		break;
	default:
		sr_err("Unknown mmode: 0x%02x.", mmode);
		break;
	}

	/* 11: Device status */
	devstat = xgittoint(devc->buf[11]);

	switch (devstat) {
	case 1: /* Normal measurement */
		break;
	case 2: /* Input loop (limit, reference values) */
		break;
	case 3: /* TRANS/SENS */
		break;
	case 4: /* Error */
		sr_err("Device error. Fuse?"); /* TODO: Really abort? */
		devc->buflen = 0;
		return;	/* Cannot continue. */
	default:
		sr_err("Unknown device status: 0x%02x", devstat);
		break;
	}

	/* 12-19: Flags and display symbols */
	/* 12, 13 */
	flags = (xgittoint(devc->buf[12]) << 8) | xgittoint(devc->buf[13]);
	/* 0x80: PRINT TODO: Stop polling when discovered? */
	/* 0x40: EXTR */
	if (analog.meaning->mq == SR_MQ_CONTINUITY) {
		if (flags & 0x20)
			value = 1.0; /* Beep */
		else
			value = 0.0;
	}
	/* 0x10: AVG */
	/* 0x08: Diode */
	if (flags & 0x04) /* REL */
		analog.meaning->mqflags |= SR_MQFLAG_RELATIVE;
	/* 0x02: SHIFT	*/
	if (flags & 0x01) /* % */
		analog.meaning->unit = SR_UNIT_PERCENTAGE;

	/* 14, 15 */
	flags = (xgittoint(devc->buf[14]) << 8) | xgittoint(devc->buf[15]);
	if (!(flags & 0x80))	/* MAN: Manual range */
		analog.meaning->mqflags |= SR_MQFLAG_AUTORANGE;
	if (flags & 0x40) /* LOBATT1: Low battery, measurement still within specs */
		devc->lowbatt = 1;
	/* 0x20: PEAK */
	/* 0x10: COUNT */
	if (flags & 0x08)	/* HOLD */
		analog.meaning->mqflags |= SR_MQFLAG_HOLD;
	/* 0x04: LIMIT	*/
	if (flags & 0x02) 	/* MAX */
		analog.meaning->mqflags |= SR_MQFLAG_MAX;
	if (flags & 0x01) 	/* MIN */
		analog.meaning->mqflags |= SR_MQFLAG_MIN;

	/* 16, 17 */
	flags = (xgittoint(devc->buf[16]) << 8) | xgittoint(devc->buf[17]);
	/* 0xe0: undefined */
	if (flags & 0x10) { /* LOBATT2: Low battery, measurement inaccurate */
		devc->lowbatt = 2;
		sr_warn("Low battery, measurement quality degraded!");
	}
	/* 0x08: SCALED */
	/* 0x04: RATE (=lower resolution, allows higher data rate up to 10/s. */
	/* 0x02: Current clamp */
	if (flags & 0x01) { /* dB */
		/*
		 * TODO: The Norma has an adjustable dB reference value. If
		 * changed from default, this is not correct.
		 */
		if (analog.meaning->unit == SR_UNIT_VOLT)
			analog.meaning->unit = SR_UNIT_DECIBEL_VOLT;
		else
			analog.meaning->unit = SR_UNIT_UNITLESS;
	}

	/* 18, 19 */
	/* flags = (xgittoint(devc->buf[18]) << 8) | xgittoint(devc->buf[19]); */
	/* 0x80: Undefined. */
	/* 0x40: Remote mode, keyboard locked */
	/* 0x38: Undefined. */
	/* 0x04: MIN > MAX */
	/* 0x02: Measured value < Min */
	/* 0x01: Measured value > Max */

	/* 4: Flags. Evaluating this after setting value! */
	flags = xgittoint(devc->buf[4]);
	if (flags & 0x04) /* Invalid value */
		value = NAN;
	else if (flags & 0x01) /* Overload */
		value = INFINITY;
	if (flags & 0x02) { /* Duplicate value, has been sent before. */
		sr_spew("Duplicate value, dismissing!");
		devc->buflen = 0;
		return;
	}

	sr_spew("range=%d/scale=%f/value=%f", range,
		(double)scale, (double)value);

	/* Finish and send packet. */
	analog.meaning->channels = sdi->channels;
	analog.num_samples = 1;
	analog.data = &value;

	memset(&packet, 0, sizeof(struct sr_datafeed_packet));
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	sr_session_send(sdi, &packet);

	/* Finish processing. */
	sr_sw_limits_update_samples_read(&devc->limits, 1);
	devc->buflen = 0;
}

SR_PRIV int norma_dmm_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;

	(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 (NMADMM_BUFSIZE - devc->buflen - 1 > 0) {
			len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
			if (len < 1)
				break;
			devc->buflen += len;
			*(devc->buf + devc->buflen) = '\0';
			if (*(devc->buf + devc->buflen - 1) == '\n') {
				/*
				 * TODO: According to specs, should be \r, but
				 * then we'd have to get rid of the \n.
				 */
				devc->last_req_pending = FALSE;
				nma_process_line(sdi);
				break;
			}
		}
	}

	if (sr_sw_limits_check(&devc->limits)) {
		sr_dev_acquisition_stop(sdi);
	} else {
		/* Request next package. */
		if (devc->last_req_pending) {
			gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
			if (elapsed_us > NMADMM_TIMEOUT_MS * 1000) {/* Timeout! */
				sr_spew("Request timeout!");
				devc->last_req_pending = FALSE;
			}
		}
		if (!devc->last_req_pending) {
			if (nma_send_req(sdi, NMADMM_REQ_STATUS, NULL) != SR_OK)
				return FALSE;
		}
	}

	return TRUE;
}
Commit	Line	Data
bfd48770 MH	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
	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>
bfd48770 MH	21	#include "protocol.h"
bfd48770 MH	22
07ffa5b3 UH	23	#define LINE_LENGTH 20
07ffa5b3 UH	24
e790bd5c UH	25	SR_PRIV const struct nmadmm_req nmadmm_requests[] = {
	26	{ NMADMM_REQ_IDN, "IDN?" },
	27	{ NMADMM_REQ_IDN, "STATUS?" },
1b4aedc0	28	ALL_ZERO
e790bd5c UH	29	};
	30
	31	static int nma_send_req(const struct sr_dev_inst sdi, int req, char params)
	32	{
	33	struct sr_serial_dev_inst *serial;
	34	struct dev_context *devc;
	35	char buf[NMADMM_BUFSIZE];
	36	int len;
	37
	38	if (!sdi \|\| !(serial = sdi->conn) \|\| !(devc = sdi->priv))
	39	return SR_ERR_BUG;
f8e76e2e	40
e790bd5c UH	41	len = snprintf(buf, sizeof(buf), "%s%s\r\n",
e790bd5c UH	42	nmadmm_requests[req].req_str, params ? params : "");
f8e76e2e	43
e790bd5c	44	sr_spew("Sending request: '%s'.", buf);
f8e76e2e	45
e790bd5c UH	46	devc->last_req = req;
e790bd5c UH	47	devc->last_req_pending = TRUE;
f8e76e2e	48
d545c81c UH	49	if (serial_write_blocking(serial, buf, len,
d545c81c UH	50	serial_timeout(serial, len)) < 0) {
92714255	51	sr_err("Unable to send request.");
e790bd5c UH	52	devc->last_req_pending = FALSE;
	53	return SR_ERR;
	54	}
	55
a4e435eb MH	56	devc->req_sent_at = g_get_monotonic_time();
a4e435eb MH	57
e790bd5c UH	58	return SR_OK;
	59	}
	60
	61	/**
	62	* Convert hexadecimal digit to int.
	63	*
	64	* @param[in] xgit Hexadecimal digit to convert.
	65	* @return Int value of xgit (0 on invalid xgit).
f8e76e2e MH	66	*/
	67	SR_PRIV int xgittoint(char xgit)
	68	{
	69	if ((xgit >= '0') && (xgit <= '9'))
	70	return xgit - '0';
	71	xgit = tolower(xgit);
	72	if ((xgit >= 'a') && (xgit <= 'f'))
	73	return xgit - 'a';
	74	return 0;
	75	}
	76
e790bd5c	77	/**
04cb9157	78	* Process received line. It consists of 20 hex digits + \\r\\n,
e790bd5c UH	79	* e.g. '08100400018100400000'.
e790bd5c UH	80	*/
f8e76e2e MH	81	static void nma_process_line(const struct sr_dev_inst *sdi)
	82	{
	83	struct dev_context *devc;
	84	int pos, flags;
	85	int vt, range; /* Measurement value type, range in device format */
	86	int mmode, devstat; /* Measuring mode, device status */
	87	float value; /* Measured value */
	88	float scale; /* Scaling factor depending on range and function */
55bee166 UH	89	struct sr_datafeed_analog analog;
	90	struct sr_analog_encoding encoding;
	91	struct sr_analog_meaning meaning;
	92	struct sr_analog_spec spec;
f8e76e2e MH	93	struct sr_datafeed_packet packet;
	94
	95	devc = sdi->priv;
	96
07ffa5b3	97	devc->buf[LINE_LENGTH] = '\0';
f8e76e2e MH	98
	99	sr_spew("Received line '%s'.", devc->buf);
	100
e790bd5c	101	/* Check line. */
07ffa5b3	102	if (strlen((const char *)devc->buf) != LINE_LENGTH) {
e790bd5c UH	103	sr_err("line: Invalid status '%s', must be 20 hex digits.",
e790bd5c UH	104	devc->buf);
f8e76e2e MH	105	devc->buflen = 0;
	106	return;
	107	}
e790bd5c	108
07ffa5b3	109	for (pos = 0; pos < LINE_LENGTH; pos++) {
f8e76e2e MH	110	if (!isxdigit(devc->buf[pos])) {
	111	sr_err("line: Expected hex digit in '%s' at pos %d!",
	112	devc->buf, pos);
	113	devc->buflen = 0;
	114	return;
	115	}
e790bd5c	116	}
f8e76e2e MH	117
	118	/* Start decoding. */
	119	value = 0.0;
	120	scale = 1.0;
7dcaddd3 UH	121	/* TODO: Use proper 'digits' value for this device (and its modes). */
7dcaddd3 UH	122	sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
f8e76e2e	123
e790bd5c UH	124	/*
	125	* The numbers are hex digits, starting from 0.
	126	* 0: Keyboard status, currently not interesting.
	127	* 1: Central switch status, currently not interesting.
	128	* 2: Type of measured value.
	129	*/
f8e76e2e MH	130	vt = xgittoint(devc->buf[2]);
f8e76e2e MH	131	switch (vt) {
e790bd5c	132	case 0:
55bee166	133	analog.meaning->mq = SR_MQ_VOLTAGE;
f8e76e2e	134	break;
e790bd5c	135	case 1:
55bee166	136	analog.meaning->mq = SR_MQ_CURRENT; /* 2A */
f8e76e2e	137	break;
e790bd5c	138	case 2:
55bee166	139	analog.meaning->mq = SR_MQ_RESISTANCE;
f8e76e2e	140	break;
e790bd5c	141	case 3:
55bee166	142	analog.meaning->mq = SR_MQ_CAPACITANCE;
f8e76e2e	143	break;
e790bd5c	144	case 4:
55bee166	145	analog.meaning->mq = SR_MQ_TEMPERATURE;
f8e76e2e	146	break;
e790bd5c	147	case 5:
55bee166	148	analog.meaning->mq = SR_MQ_FREQUENCY;
f8e76e2e	149	break;
e790bd5c	150	case 6:
55bee166	151	analog.meaning->mq = SR_MQ_CURRENT; /* 10A */
f8e76e2e	152	break;
e790bd5c	153	case 7:
55bee166	154	analog.meaning->mq = SR_MQ_GAIN; /* TODO: Scale factor */
f8e76e2e	155	break;
e790bd5c	156	case 8:
55bee166	157	analog.meaning->mq = SR_MQ_GAIN; /* Percentage */
f8e76e2e MH	158	scale /= 100.0;
f8e76e2e MH	159	break;
e790bd5c	160	case 9:
55bee166	161	analog.meaning->mq = SR_MQ_GAIN; /* dB */
f8e76e2e MH	162	scale /= 100.0;
f8e76e2e MH	163	break;
e790bd5c UH	164	default:
	165	sr_err("Unknown value type: 0x%02x.", vt);
	166	break;
f8e76e2e	167	}
e790bd5c	168
f8e76e2e MH	169	/* 3: Measurement range for measured value */
	170	range = xgittoint(devc->buf[3]);
	171	switch (vt) {
e790bd5c	172	case 0: /* V */
f8e76e2e MH	173	scale *= pow(10.0, range - 5);
f8e76e2e MH	174	break;
e790bd5c	175	case 1: /* A */
f8e76e2e MH	176	scale *= pow(10.0, range - 7);
f8e76e2e MH	177	break;
e790bd5c	178	case 2: /* Ω */
f8e76e2e MH	179	scale *= pow(10.0, range - 2);
f8e76e2e MH	180	break;
e790bd5c	181	case 3: /* F */
f8e76e2e MH	182	scale *= pow(10.0, range - 12);
f8e76e2e MH	183	break;
e790bd5c	184	case 4: /* °C */
f8e76e2e MH	185	scale *= pow(10.0, range - 1);
f8e76e2e MH	186	break;
e790bd5c	187	case 5: /* Hz */
f8e76e2e MH	188	scale *= pow(10.0, range - 2);
f8e76e2e MH	189	break;
e790bd5c	190	// No default, other value types have fixed display format.
f8e76e2e MH	191	}
	192
	193	/* 5: Sign and 1st digit */
	194	flags = xgittoint(devc->buf[5]);
	195	value = (flags & 0x03);
e790bd5c UH	196	if (flags & 0x04)
	197	scale *= -1;
	198
f8e76e2e MH	199	/* 6-9: 2nd-4th digit */
	200	for (pos = 6; pos < 10; pos++)
	201	value = value * 10 + xgittoint(devc->buf[pos]);
	202	value *= scale;
	203
	204	/* 10: Display counter */
	205	mmode = xgittoint(devc->buf[10]);
	206	switch (mmode) {
e790bd5c	207	case 0: /* Frequency */
55bee166	208	analog.meaning->unit = SR_UNIT_HERTZ;
f8e76e2e	209	break;
e790bd5c	210	case 1: /* V TRMS, only type 5 */
55bee166 UH	211	analog.meaning->unit = SR_UNIT_VOLT;
55bee166 UH	212	analog.meaning->mqflags \|= (SR_MQFLAG_AC \| SR_MQFLAG_DC \| SR_MQFLAG_RMS);
f8e76e2e	213	break;
e790bd5c	214	case 2: /* V AC */
55bee166 UH	215	analog.meaning->unit = SR_UNIT_VOLT;
55bee166 UH	216	analog.meaning->mqflags \|= SR_MQFLAG_AC;
e790bd5c	217	if (devc->type >= 3)
55bee166	218	analog.meaning->mqflags \|= SR_MQFLAG_RMS;
f8e76e2e	219	break;
e790bd5c	220	case 3: /* V DC */
55bee166 UH	221	analog.meaning->unit = SR_UNIT_VOLT;
55bee166 UH	222	analog.meaning->mqflags \|= SR_MQFLAG_DC;
f8e76e2e	223	break;
e790bd5c	224	case 4: /* Ohm */
55bee166	225	analog.meaning->unit = SR_UNIT_OHM;
f8e76e2e	226	break;
e790bd5c	227	case 5: /* Continuity */
55bee166 UH	228	analog.meaning->unit = SR_UNIT_BOOLEAN;
55bee166 UH	229	analog.meaning->mq = SR_MQ_CONTINUITY;
e790bd5c	230	/* TODO: Continuity handling is a bit odd in libsigrok. */
f8e76e2e MH	231	break;
f8e76e2e MH	232	case 6: /* Degree Celsius */
55bee166	233	analog.meaning->unit = SR_UNIT_CELSIUS;
f8e76e2e	234	break;
e790bd5c	235	case 7: /* Capacity */
55bee166	236	analog.meaning->unit = SR_UNIT_FARAD;
f8e76e2e MH	237	break;
f8e76e2e MH	238	case 8: /* Current DC */
55bee166 UH	239	analog.meaning->unit = SR_UNIT_AMPERE;
55bee166 UH	240	analog.meaning->mqflags \|= SR_MQFLAG_DC;
f8e76e2e	241	break;
e790bd5c	242	case 9: /* Current AC */
55bee166 UH	243	analog.meaning->unit = SR_UNIT_AMPERE;
55bee166 UH	244	analog.meaning->mqflags \|= SR_MQFLAG_AC;
e790bd5c	245	if (devc->type >= 3)
55bee166	246	analog.meaning->mqflags \|= SR_MQFLAG_RMS;
f8e76e2e	247	break;
e790bd5c	248	case 0xa: /* Current TRMS, only type 5 */
55bee166 UH	249	analog.meaning->unit = SR_UNIT_AMPERE;
55bee166 UH	250	analog.meaning->mqflags \|= (SR_MQFLAG_AC \| SR_MQFLAG_DC \| SR_MQFLAG_RMS);
f8e76e2e	251	break;
e790bd5c	252	case 0xb: /* Diode */
55bee166 UH	253	analog.meaning->unit = SR_UNIT_VOLT;
55bee166 UH	254	analog.meaning->mqflags \|= (SR_MQFLAG_DIODE \| SR_MQFLAG_DC);
f8e76e2e MH	255	break;
f8e76e2e MH	256	default:
e790bd5c	257	sr_err("Unknown mmode: 0x%02x.", mmode);
f8e76e2e MH	258	break;
	259	}
	260
	261	/* 11: Device status */
	262	devstat = xgittoint(devc->buf[11]);
	263
	264	switch (devstat) {
e790bd5c	265	case 1: /* Normal measurement */
f8e76e2e	266	break;
e790bd5c	267	case 2: /* Input loop (limit, reference values) */
f8e76e2e	268	break;
e790bd5c	269	case 3: /* TRANS/SENS */
f8e76e2e	270	break;
e790bd5c UH	271	case 4: /* Error */
e790bd5c UH	272	sr_err("Device error. Fuse?"); /* TODO: Really abort? */
f8e76e2e	273	devc->buflen = 0;
e790bd5c	274	return; /* Cannot continue. */
f8e76e2e	275	default:
e790bd5c	276	sr_err("Unknown device status: 0x%02x", devstat);
f8e76e2e MH	277	break;
	278	}
	279
	280	/* 12-19: Flags and display symbols */
	281	/* 12, 13 */
	282	flags = (xgittoint(devc->buf[12]) << 8) \| xgittoint(devc->buf[13]);
	283	/* 0x80: PRINT TODO: Stop polling when discovered? */
e790bd5c	284	/* 0x40: EXTR */
55bee166	285	if (analog.meaning->mq == SR_MQ_CONTINUITY) {
e790bd5c UH	286	if (flags & 0x20)
	287	value = 1.0; /* Beep */
	288	else
	289	value = 0.0;
f8e76e2e MH	290	}
	291	/* 0x10: AVG */
	292	/* 0x08: Diode */
	293	if (flags & 0x04) /* REL */
55bee166	294	analog.meaning->mqflags \|= SR_MQFLAG_RELATIVE;
f8e76e2e MH	295	/* 0x02: SHIFT */
f8e76e2e MH	296	if (flags & 0x01) /* % */
55bee166	297	analog.meaning->unit = SR_UNIT_PERCENTAGE;
f8e76e2e MH	298
	299	/* 14, 15 */
	300	flags = (xgittoint(devc->buf[14]) << 8) \| xgittoint(devc->buf[15]);
e790bd5c	301	if (!(flags & 0x80)) /* MAN: Manual range */
55bee166	302	analog.meaning->mqflags \|= SR_MQFLAG_AUTORANGE;
e790bd5c	303	if (flags & 0x40) /* LOBATT1: Low battery, measurement still within specs */
f8e76e2e	304	devc->lowbatt = 1;
e790bd5c UH	305	/* 0x20: PEAK */
	306	/* 0x10: COUNT */
	307	if (flags & 0x08) /* HOLD */
55bee166	308	analog.meaning->mqflags \|= SR_MQFLAG_HOLD;
f8e76e2e	309	/* 0x04: LIMIT */
e790bd5c	310	if (flags & 0x02) /* MAX */
55bee166	311	analog.meaning->mqflags \|= SR_MQFLAG_MAX;
e790bd5c	312	if (flags & 0x01) /* MIN */
55bee166	313	analog.meaning->mqflags \|= SR_MQFLAG_MIN;
f8e76e2e MH	314
	315	/* 16, 17 */
	316	flags = (xgittoint(devc->buf[16]) << 8) \| xgittoint(devc->buf[17]);
	317	/* 0xe0: undefined */
e790bd5c	318	if (flags & 0x10) { /* LOBATT2: Low battery, measurement inaccurate */
f8e76e2e MH	319	devc->lowbatt = 2;
	320	sr_warn("Low battery, measurement quality degraded!");
	321	}
	322	/* 0x08: SCALED */
f3f19d11	323	/* 0x04: RATE (=lower resolution, allows higher data rate up to 10/s. */
e790bd5c UH	324	/* 0x02: Current clamp */
	325	if (flags & 0x01) { /* dB */
	326	/*
	327	* TODO: The Norma has an adjustable dB reference value. If
	328	* changed from default, this is not correct.
	329	*/
55bee166 UH	330	if (analog.meaning->unit == SR_UNIT_VOLT)
55bee166 UH	331	analog.meaning->unit = SR_UNIT_DECIBEL_VOLT;
f8e76e2e	332	else
55bee166	333	analog.meaning->unit = SR_UNIT_UNITLESS;
f8e76e2e MH	334	}
	335
	336	/* 18, 19 */
e790bd5c	337	/* flags = (xgittoint(devc->buf[18]) << 8) \| xgittoint(devc->buf[19]); */
f8e76e2e MH	338	/* 0x80: Undefined. */
	339	/* 0x40: Remote mode, keyboard locked */
	340	/* 0x38: Undefined. */
e790bd5c	341	/* 0x04: MIN > MAX */
f8e76e2e MH	342	/* 0x02: Measured value < Min */
	343	/* 0x01: Measured value > Max */
	344
e790bd5c	345	/* 4: Flags. Evaluating this after setting value! */
f8e76e2e	346	flags = xgittoint(devc->buf[4]);
e790bd5c	347	if (flags & 0x04) /* Invalid value */
d9251a2c	348	value = NAN;
e790bd5c	349	else if (flags & 0x01) /* Overload */
d9251a2c	350	value = INFINITY;
e790bd5c	351	if (flags & 0x02) { /* Duplicate value, has been sent before. */
d9251a2c UH	352	sr_spew("Duplicate value, dismissing!");
	353	devc->buflen = 0;
	354	return;
f8e76e2e MH	355	}
f8e76e2e MH	356
e790bd5c UH	357	sr_spew("range=%d/scale=%f/value=%f", range,
e790bd5c UH	358	(double)scale, (double)value);
f8e76e2e	359
e790bd5c	360	/* Finish and send packet. */
55bee166	361	analog.meaning->channels = sdi->channels;
f8e76e2e MH	362	analog.num_samples = 1;
	363	analog.data = &value;
	364
d0148a50	365	memset(&packet, 0, sizeof(struct sr_datafeed_packet));
55bee166	366	packet.type = SR_DF_ANALOG;
f8e76e2e	367	packet.payload = &analog;
695dc859	368	sr_session_send(sdi, &packet);
f8e76e2e	369
e790bd5c	370	/* Finish processing. */
37dbffd1	371	sr_sw_limits_update_samples_read(&devc->limits, 1);
f8e76e2e MH	372	devc->buflen = 0;
	373	}
	374
bfd48770 MH	375	SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data)
bfd48770 MH	376	{
f8e76e2e	377	struct sr_dev_inst *sdi;
bfd48770	378	struct dev_context *devc;
f8e76e2e MH	379	struct sr_serial_dev_inst *serial;
f8e76e2e MH	380	int len;
bfd48770 MH	381
	382	(void)fd;
	383
	384	if (!(sdi = cb_data))
	385	return TRUE;
	386
	387	if (!(devc = sdi->priv))
	388	return TRUE;
	389
f8e76e2e	390	serial = sdi->conn;
bfd48770	391	if (revents == G_IO_IN) {
f8e76e2e	392	/* Serial data arrived. */
e790bd5c	393	while (NMADMM_BUFSIZE - devc->buflen - 1 > 0) {
32950cc0	394	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
f8e76e2e MH	395	if (len < 1)
	396	break;
	397	devc->buflen += len;
	398	*(devc->buf + devc->buflen) = '\0';
	399	if (*(devc->buf + devc->buflen - 1) == '\n') {
e790bd5c UH	400	/*
	401	* TODO: According to specs, should be \r, but
	402	* then we'd have to get rid of the \n.
	403	*/
f8e76e2e MH	404	devc->last_req_pending = FALSE;
	405	nma_process_line(sdi);
	406	break;
	407	}
	408	}
	409	}
	410
37dbffd1	411	if (sr_sw_limits_check(&devc->limits)) {
d2f7c417	412	sr_dev_acquisition_stop(sdi);
37dbffd1 LPC	413	} else {
37dbffd1 LPC	414	/* Request next package. */
a4e435eb MH	415	if (devc->last_req_pending) {
	416	gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
	417	if (elapsed_us > NMADMM_TIMEOUT_MS * 1000) {/* Timeout! */
	418	sr_spew("Request timeout!");
	419	devc->last_req_pending = FALSE;
	420	}
	421	}
	422	if (!devc->last_req_pending) {
	423	if (nma_send_req(sdi, NMADMM_REQ_STATUS, NULL) != SR_OK)
	424	return FALSE;
	425	}
bfd48770 MH	426	}
	427
	428	return TRUE;
	429	}