[libsigrok.git] / hardware / serial-dmm / protocol.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
 * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"

static void log_dmm_packet(const uint8_t *buf)
{
	sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x"
	       " %02x %02x %02x %02x %02x %02x %02x",
	       buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
	       buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13]);
}

SR_PRIV void dmm_details_dt4000zc(struct sr_datafeed_analog *analog, void *info)
{
	dmm_details_tp4000zc(analog, info); /* Same as TP4000ZC. */
}

SR_PRIV void dmm_details_tp4000zc(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature. */
	if (info_local->is_c2c1_10) {
		analog->mq = SR_MQ_TEMPERATURE;
		analog->unit = SR_UNIT_CELSIUS;
	}
}

SR_PRIV void dmm_details_va18b(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature. */
	if (info_local->is_c2c1_01) {
		analog->mq = SR_MQ_TEMPERATURE;
		analog->unit = SR_UNIT_CELSIUS;
	}
}

SR_PRIV void dmm_details_pce_dm32(struct sr_datafeed_analog *analog, void *info)
{
	struct fs9721_info *info_local;

	info_local = (struct fs9721_info *)info;

	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (F). */
	if (info_local->is_c2c1_01) {
		analog->mq = SR_MQ_TEMPERATURE;
		analog->unit = SR_UNIT_FAHRENHEIT;
	}

	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
	if (info_local->is_c2c1_10) {
		analog->mq = SR_MQ_TEMPERATURE;
		analog->unit = SR_UNIT_CELSIUS;
	}
}

static void handle_packet(const uint8_t *buf, struct dev_context *devc,
			  int dmm, void *info)
{
	float floatval;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog *analog;

	log_dmm_packet(buf);

	if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) {
		sr_err("Analog packet malloc failed.");
		return;
	}

	analog->num_samples = 1;
	analog->mq = -1;

	dmms[dmm].packet_parse(buf, &floatval, analog, info);
	analog->data = &floatval;

	/* If this DMM needs additional handling, call the resp. function. */
	if (dmms[dmm].dmm_details)
		dmms[dmm].dmm_details(analog, info);

	if (analog->mq != -1) {
		/* Got a measurement. */
		packet.type = SR_DF_ANALOG;
		packet.payload = analog;
		sr_session_send(devc->cb_data, &packet);
		devc->num_samples++;
	}

	g_free(analog);
}

static void handle_new_data(struct dev_context *devc, int dmm, void *info)
{
	int len, i, offset = 0;

	/* Try to get as much data as the buffer can hold. */
	len = DMM_BUFSIZE - devc->buflen;
	len = serial_read(devc->serial, devc->buf + devc->buflen, len);
	if (len < 1) {
		sr_err("Serial port read error: %d.", len);
		return;
	}
	devc->buflen += len;

	/* Now look for packets in that data. */
	while ((devc->buflen - offset) >= dmms[dmm].packet_size) {
		if (dmms[dmm].packet_valid(devc->buf + offset)) {
			handle_packet(devc->buf + offset, devc, dmm, info);
			offset += dmms[dmm].packet_size;
		} else {
			offset++;
		}
	}

	/* If we have any data left, move it to the beginning of our buffer. */
	for (i = 0; i < devc->buflen - offset; i++)
		devc->buf[i] = devc->buf[offset + i];
	devc->buflen -= offset;
}

static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	int ret;

	(void)fd;

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

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

	if (revents == G_IO_IN) {
		/* Serial data arrived. */
		handle_new_data(devc, dmm, info);
	} else {
		/* Timeout, send another packet request (if DMM needs it). */
		if (dmms[dmm].packet_request) {
			ret = dmms[dmm].packet_request(devc->serial);
			if (ret < 0) {
				sr_err("Failed to request packet: %d.", ret);
				return FALSE;
			}
		}
	}

	if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
		sr_info("Requested number of samples reached, stopping.");
		sdi->driver->dev_acquisition_stop(sdi, cb_data);
		return TRUE;
	}

	return TRUE;
}

#define RECEIVE_DATA(ID_UPPER, DMM_DRIVER) \
SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
	struct DMM_DRIVER##_info info; \
	return receive_data(fd, revents, ID_UPPER, &info, cb_data); }

/* Driver-specific receive_data() wrappers */
RECEIVE_DATA(DIGITEK_DT4000ZC, fs9721)
RECEIVE_DATA(TEKPOWER_TP4000ZC, fs9721)
RECEIVE_DATA(METEX_ME31, metex14)
RECEIVE_DATA(PEAKTECH_3410, metex14)
RECEIVE_DATA(MASTECH_MAS345, metex14)
RECEIVE_DATA(VA_VA18B, fs9721)
RECEIVE_DATA(METEX_M3640D, metex14)
RECEIVE_DATA(PEAKTECH_4370, metex14)
RECEIVE_DATA(PCE_PCE_DM32, fs9721)
RECEIVE_DATA(RADIOSHACK_22_168, metex14)
RECEIVE_DATA(RADIOSHACK_22_812, rs9lcd)
RECEIVE_DATA(VOLTCRAFT_VC820, fs9721)
RECEIVE_DATA(VOLTCRAFT_VC840, fs9721)
Commit	Line	Data
7dc55d93 AG	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
729b01f9	5	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
7dc55d93 AG	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
7dc55d93 AG	21	#include <stdlib.h>
	22	#include <math.h>
	23	#include <string.h>
	24	#include <errno.h>
22f54192	25	#include <glib.h>
bbabddbd UH	26	#include "libsigrok.h"
	27	#include "libsigrok-internal.h"
	28	#include "protocol.h"
7dc55d93	29
6bef68a7 UH	30	static void log_dmm_packet(const uint8_t *buf)
	31	{
	32	sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x"
	33	" %02x %02x %02x %02x %02x %02x %02x",
	34	buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
	35	buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13]);
	36	}
	37
f086b830 UH	38	SR_PRIV void dmm_details_dt4000zc(struct sr_datafeed_analog analog, void info)
	39	{
	40	dmm_details_tp4000zc(analog, info); /* Same as TP4000ZC. */
	41	}
	42
729b01f9 UH	43	SR_PRIV void dmm_details_tp4000zc(struct sr_datafeed_analog analog, void info)
	44	{
	45	struct fs9721_info *info_local;
	46
	47	info_local = (struct fs9721_info *)info;
	48
	49	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature. */
	50	if (info_local->is_c2c1_10) {
	51	analog->mq = SR_MQ_TEMPERATURE;
6dca2f16 UH	52	analog->unit = SR_UNIT_CELSIUS;
	53	}
	54	}
	55
	56	SR_PRIV void dmm_details_va18b(struct sr_datafeed_analog analog, void info)
	57	{
	58	struct fs9721_info *info_local;
	59
	60	info_local = (struct fs9721_info *)info;
	61
	62	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature. */
	63	if (info_local->is_c2c1_01) {
	64	analog->mq = SR_MQ_TEMPERATURE;
729b01f9 UH	65	analog->unit = SR_UNIT_CELSIUS;
	66	}
	67	}
	68
d4bd66a0 UH	69	SR_PRIV void dmm_details_pce_dm32(struct sr_datafeed_analog analog, void info)
	70	{
	71	struct fs9721_info *info_local;
	72
	73	info_local = (struct fs9721_info *)info;
	74
	75	/* User-defined FS9721_LP3 flag 'c2c1_01' means temperature (F). */
	76	if (info_local->is_c2c1_01) {
	77	analog->mq = SR_MQ_TEMPERATURE;
	78	analog->unit = SR_UNIT_FAHRENHEIT;
	79	}
	80
	81	/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature (C). */
	82	if (info_local->is_c2c1_10) {
	83	analog->mq = SR_MQ_TEMPERATURE;
	84	analog->unit = SR_UNIT_CELSIUS;
	85	}
	86	}
	87
729b01f9 UH	88	static void handle_packet(const uint8_t buf, struct dev_context devc,
729b01f9 UH	89	int dmm, void *info)
7dc55d93	90	{
8c1adf37	91	float floatval;
7dc55d93 AG	92	struct sr_datafeed_packet packet;
	93	struct sr_datafeed_analog *analog;
	94
6bef68a7 UH	95	log_dmm_packet(buf);
6bef68a7 UH	96
bbabddbd	97	if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) {
8c1adf37	98	sr_err("Analog packet malloc failed.");
7dc55d93 AG	99	return;
7dc55d93 AG	100	}
bbabddbd	101
bbabddbd	102	analog->num_samples = 1;
7dc55d93 AG	103	analog->mq = -1;
7dc55d93 AG	104
729b01f9	105	dmms[dmm].packet_parse(buf, &floatval, analog, info);
d84fc9cb	106	analog->data = &floatval;
be5c1d3b	107
22f54192	108	/* If this DMM needs additional handling, call the resp. function. */
ce3777ad UH	109	if (dmms[dmm].dmm_details)
ce3777ad UH	110	dmms[dmm].dmm_details(analog, info);
7dc55d93	111
7dc55d93 AG	112	if (analog->mq != -1) {
7dc55d93 AG	113	/* Got a measurement. */
7dc55d93 AG	114	packet.type = SR_DF_ANALOG;
	115	packet.payload = analog;
	116	sr_session_send(devc->cb_data, &packet);
	117	devc->num_samples++;
	118	}
bbabddbd	119
7dc55d93 AG	120	g_free(analog);
	121	}
	122
729b01f9	123	static void handle_new_data(struct dev_context devc, int dmm, void info)
7dc55d93	124	{
bbabddbd	125	int len, i, offset = 0;
bbabddbd UH	126
bbabddbd UH	127	/* Try to get as much data as the buffer can hold. */
7dc55d93	128	len = DMM_BUFSIZE - devc->buflen;
d35afa87	129	len = serial_read(devc->serial, devc->buf + devc->buflen, len);
7dc55d93	130	if (len < 1) {
bbabddbd	131	sr_err("Serial port read error: %d.", len);
7dc55d93 AG	132	return;
	133	}
	134	devc->buflen += len;
	135
bbabddbd	136	/* Now look for packets in that data. */
729b01f9 UH	137	while ((devc->buflen - offset) >= dmms[dmm].packet_size) {
	138	if (dmms[dmm].packet_valid(devc->buf + offset)) {
	139	handle_packet(devc->buf + offset, devc, dmm, info);
	140	offset += dmms[dmm].packet_size;
7dc55d93 AG	141	} else {
	142	offset++;
	143	}
	144	}
	145
bbabddbd UH	146	/* If we have any data left, move it to the beginning of our buffer. */
bbabddbd UH	147	for (i = 0; i < devc->buflen - offset; i++)
7dc55d93 AG	148	devc->buf[i] = devc->buf[offset + i];
	149	devc->buflen -= offset;
	150	}
	151
729b01f9	152	static int receive_data(int fd, int revents, int dmm, void info, void cb_data)
7dc55d93	153	{
642e9d62	154	struct sr_dev_inst *sdi;
7dc55d93	155	struct dev_context *devc;
ce3777ad	156	int ret;
7dc55d93	157
d35afa87 BV	158	(void)fd;
d35afa87 BV	159
7dc55d93 AG	160	if (!(sdi = cb_data))
	161	return TRUE;
	162
	163	if (!(devc = sdi->priv))
	164	return TRUE;
	165
bbabddbd	166	if (revents == G_IO_IN) {
7dc55d93	167	/* Serial data arrived. */
729b01f9	168	handle_new_data(devc, dmm, info);
ce3777ad UH	169	} else {
	170	/* Timeout, send another packet request (if DMM needs it). */
	171	if (dmms[dmm].packet_request) {
	172	ret = dmms[dmm].packet_request(devc->serial);
	173	if (ret < 0) {
	174	sr_err("Failed to request packet: %d.", ret);
	175	return FALSE;
	176	}
	177	}
7dc55d93 AG	178	}
7dc55d93 AG	179
d55c89f5	180	if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
6bef68a7	181	sr_info("Requested number of samples reached, stopping.");
7dc55d93 AG	182	sdi->driver->dev_acquisition_stop(sdi, cb_data);
	183	return TRUE;
	184	}
	185
	186	return TRUE;
	187	}
729b01f9	188
22f54192	189	#define RECEIVE_DATA(ID_UPPER, DMM_DRIVER) \
dccfe015 UH	190	SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
	191	struct DMM_DRIVER##_info info; \
	192	return receive_data(fd, revents, ID_UPPER, &info, cb_data); }
	193
	194	/* Driver-specific receive_data() wrappers */
22f54192 UH	195	RECEIVE_DATA(DIGITEK_DT4000ZC, fs9721)
	196	RECEIVE_DATA(TEKPOWER_TP4000ZC, fs9721)
	197	RECEIVE_DATA(METEX_ME31, metex14)
	198	RECEIVE_DATA(PEAKTECH_3410, metex14)
	199	RECEIVE_DATA(MASTECH_MAS345, metex14)
	200	RECEIVE_DATA(VA_VA18B, fs9721)
	201	RECEIVE_DATA(METEX_M3640D, metex14)
	202	RECEIVE_DATA(PEAKTECH_4370, metex14)
	203	RECEIVE_DATA(PCE_PCE_DM32, fs9721)
	204	RECEIVE_DATA(RADIOSHACK_22_168, metex14)
	205	RECEIVE_DATA(RADIOSHACK_22_812, rs9lcd)
40830061	206	RECEIVE_DATA(VOLTCRAFT_VC820, fs9721)
54d11221	207	RECEIVE_DATA(VOLTCRAFT_VC840, fs9721)