[libsigrok.git] / src / hardware / motech-lps-30x / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
 * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx)
 *
 * 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 <errno.h>
#include <string.h>
#include "protocol.h"

/** Send data packets for current measurements. */
static void send_data(struct sr_dev_inst *sdi)
{
	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;
	int i;
	float data[MAX_CHANNELS];

	devc = sdi->priv;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;

	/* Note: digits/spec_digits will be overridden later. */
	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);

	analog.meaning->channels = sdi->channels;
	analog.num_samples = 1;
	analog.meaning->mq = SR_MQ_VOLTAGE;
	analog.meaning->unit = SR_UNIT_VOLT;
	analog.meaning->mqflags = SR_MQFLAG_DC;
	analog.encoding->digits = 3;
	analog.spec->spec_digits = 2;
	analog.data = data;

	for (i = 0; i < devc->model->num_channels; i++)
		((float *)analog.data)[i] = devc->channel_status[i].output_voltage_last; /* Value always 3.3 or 5 for channel 3, if present! */
	sr_session_send(sdi, &packet);

	analog.meaning->mq = SR_MQ_CURRENT;
	analog.meaning->unit = SR_UNIT_AMPERE;
	analog.meaning->mqflags = 0;
	analog.encoding->digits = 4;
	analog.spec->spec_digits = 3;
	analog.data = data;
	for (i = 0; i < devc->model->num_channels; i++)
		((float *)analog.data)[i] = devc->channel_status[i].output_current_last; /* Value always 0 for channel 3, if present! */
	sr_session_send(sdi, &packet);

	sr_sw_limits_update_samples_read(&devc->limits, 1);
}

/** Process a complete line (without CR/LF) in buf. */
static void process_line(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	double dbl;
	int auxint;

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

	switch (devc->acq_req_pending) {
	case 0: /* Should not happen... */
		break;
	case 1: /* Waiting for data reply to request */
		/* Convert numbers */
		switch (devc->acq_req) {
		case AQ_U1:
		case AQ_U2:
		case AQ_I1:
		case AQ_I2:
			dbl = 0.0;
			if (sr_atod_ascii(devc->buf, &dbl) != SR_OK) {
				sr_err("Failed to convert '%s' to double, errno=%d %s",
					devc->buf, errno, g_strerror(errno));
				dbl = 0.0;
			}
			break;
		case AQ_STATUS:
			auxint = 0;
			if (sr_atoi(devc->buf, &auxint) != SR_OK) {
				sr_err("Failed to convert '%s' to int, errno=%d %s",
					devc->buf, errno, g_strerror(errno));
				auxint = 0;
			}
			break;
		default:
			break;
		}

		switch (devc->acq_req) {
		case AQ_U1:
			devc->channel_status[0].output_voltage_last = dbl;
			break;
		case AQ_I1:
			devc->channel_status[0].output_current_last = dbl;
			break;
		case AQ_U2:
			devc->channel_status[1].output_voltage_last = dbl;
			break;
		case AQ_I2:
			devc->channel_status[1].output_current_last = dbl;
			break;
		case AQ_STATUS: /* Process status and generate data. */
			if (lps_process_status(sdi, auxint) == SR_OK) {
				send_data(sdi);
			}
			break;
		default:
			break;
		}

		devc->acq_req_pending = 2;
		break;
	case 2: /* Waiting for OK after request */
		if (strcmp(devc->buf, "OK")) {
			sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
		}
		devc->acq_req_pending = 0;
		break;
	}

	devc->buf[0] = '\0';
	devc->buflen = 0;
}

SR_PRIV int motech_lps_30x_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 (LINELEN_MAX - devc->buflen - 2 > 0) {
			len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
			if (len < 1)
				break;

			/* Eliminate whitespace at beginning of line. */
			if (g_ascii_isspace(devc->buf[0])) {
				devc->buf[0] = '\0';
				devc->buflen = 0;
				continue;
			}

			devc->buflen += len;
			devc->buf[devc->buflen] = '\0';

			/* If line complete, process msg. */
			if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') || devc->buf[devc->buflen-1] == '\n')) {
				devc->buflen--;
				devc->buf[devc->buflen] = '\0';

				sr_spew("Line complete: \"%s\"", devc->buf);
				process_line(sdi);
			}
		}
	}

	if (sr_sw_limits_check(&devc->limits))
		sr_dev_acquisition_stop(sdi);

	/* Only request the next packet if required. */
	if (!((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)))
		return TRUE;

	if (devc->acq_req_pending) {
		int64_t elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
		if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
			sr_spew("Request timeout: req=%d t=%" PRIi64 "us",
				(int)devc->acq_req, elapsed_us);
			devc->acq_req_pending = 0;
		}
	}

	if (devc->acq_req_pending == 0) {
		switch (devc->acq_req) {
		case AQ_NONE: /* Fall through */
		case AQ_STATUS:
			devc->acq_req = AQ_U1;
			lps_send_req(serial, "VOUT1");
			break;
		case AQ_U1:
			devc->acq_req = AQ_I1;
			lps_send_req(serial, "IOUT1");
			break;
		case AQ_I1:
			if (devc->model->num_channels == 1) {
				devc->acq_req = AQ_STATUS;
				lps_send_req(serial, "STATUS");
			} else {
				devc->acq_req = AQ_U2;
				lps_send_req(serial, "VOUT2");
			}
			break;
		case AQ_U2:
			devc->acq_req = AQ_I2;
			lps_send_req(serial, "IOUT2");
			break;
		case AQ_I2:
			devc->acq_req = AQ_STATUS;
			lps_send_req(serial, "STATUS");
			break;
		default:
			sr_err("Illegal devc->acq_req=%d", devc->acq_req);
			return SR_ERR;
		}
		devc->req_sent_at = g_get_real_time();
		devc->acq_req_pending = 1;
	}

	return TRUE;
}
Commit	Line	Data
41b7bd01 MH	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
1c3d002b	5	* Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx)
41b7bd01 MH	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
6ec6c43b	21	#include <config.h>
1c3d002b MH	22	#include <errno.h>
1c3d002b MH	23	#include <string.h>
41b7bd01 MH	24	#include "protocol.h"
41b7bd01 MH	25
1c3d002b MH	26	/** Send data packets for current measurements. */
	27	static void send_data(struct sr_dev_inst *sdi)
	28	{
	29	struct dev_context *devc;
	30	struct sr_datafeed_packet packet;
ddfe99d9 UH	31	struct sr_datafeed_analog analog;
	32	struct sr_analog_encoding encoding;
	33	struct sr_analog_meaning meaning;
	34	struct sr_analog_spec spec;
1c3d002b MH	35	int i;
	36	float data[MAX_CHANNELS];
	37
	38	devc = sdi->priv;
ddfe99d9	39	packet.type = SR_DF_ANALOG;
1c3d002b	40	packet.payload = &analog;
1c3d002b	41
869c8375	42	/* Note: digits/spec_digits will be overridden later. */
ddfe99d9 UH	43	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	44
	45	analog.meaning->channels = sdi->channels;
	46	analog.num_samples = 1;
	47	analog.meaning->mq = SR_MQ_VOLTAGE;
	48	analog.meaning->unit = SR_UNIT_VOLT;
	49	analog.meaning->mqflags = SR_MQFLAG_DC;
bcaadb36 AJ	50	analog.encoding->digits = 3;
bcaadb36 AJ	51	analog.spec->spec_digits = 2;
1c3d002b	52	analog.data = data;
ddfe99d9	53
1c3d002b	54	for (i = 0; i < devc->model->num_channels; i++)
ddfe99d9	55	((float )analog.data)[i] = devc->channel_status[i].output_voltage_last; / Value always 3.3 or 5 for channel 3, if present! */
1c3d002b MH	56	sr_session_send(sdi, &packet);
1c3d002b MH	57
ddfe99d9 UH	58	analog.meaning->mq = SR_MQ_CURRENT;
	59	analog.meaning->unit = SR_UNIT_AMPERE;
	60	analog.meaning->mqflags = 0;
bcaadb36 AJ	61	analog.encoding->digits = 4;
bcaadb36 AJ	62	analog.spec->spec_digits = 3;
1c3d002b MH	63	analog.data = data;
1c3d002b MH	64	for (i = 0; i < devc->model->num_channels; i++)
ddfe99d9	65	((float )analog.data)[i] = devc->channel_status[i].output_current_last; / Value always 0 for channel 3, if present! */
1c3d002b MH	66	sr_session_send(sdi, &packet);
1c3d002b MH	67
8aafc5e6	68	sr_sw_limits_update_samples_read(&devc->limits, 1);
1c3d002b MH	69	}
	70
	71	/** Process a complete line (without CR/LF) in buf. */
	72	static void process_line(struct sr_dev_inst *sdi)
	73	{
	74	struct dev_context *devc;
1c3d002b MH	75	double dbl;
	76	int auxint;
	77
	78	devc = sdi->priv;
e4924d75 GS	79	if (!devc)
e4924d75 GS	80	return;
1c3d002b MH	81
	82	switch (devc->acq_req_pending) {
	83	case 0: /* Should not happen... */
	84	break;
	85	case 1: /* Waiting for data reply to request */
	86	/* Convert numbers */
	87	switch (devc->acq_req) {
93b118da UH	88	case AQ_U1:
	89	case AQ_U2:
	90	case AQ_I1:
	91	case AQ_I2:
e4924d75	92	dbl = 0.0;
4f0463a0	93	if (sr_atod_ascii(devc->buf, &dbl) != SR_OK) {
1c3d002b	94	sr_err("Failed to convert '%s' to double, errno=%d %s",
7237e912	95	devc->buf, errno, g_strerror(errno));
1c3d002b MH	96	dbl = 0.0;
	97	}
	98	break;
	99	case AQ_STATUS:
e4924d75	100	auxint = 0;
1c3d002b MH	101	if (sr_atoi(devc->buf, &auxint) != SR_OK) {
1c3d002b MH	102	sr_err("Failed to convert '%s' to int, errno=%d %s",
7237e912	103	devc->buf, errno, g_strerror(errno));
1c3d002b MH	104	auxint = 0;
	105	}
	106	break;
	107	default:
	108	break;
	109	}
	110
	111	switch (devc->acq_req) {
	112	case AQ_U1:
	113	devc->channel_status[0].output_voltage_last = dbl;
	114	break;
	115	case AQ_I1:
	116	devc->channel_status[0].output_current_last = dbl;
	117	break;
	118	case AQ_U2:
	119	devc->channel_status[1].output_voltage_last = dbl;
	120	break;
	121	case AQ_I2:
	122	devc->channel_status[1].output_current_last = dbl;
	123	break;
	124	case AQ_STATUS: /* Process status and generate data. */
	125	if (lps_process_status(sdi, auxint) == SR_OK) {
	126	send_data(sdi);
	127	}
	128	break;
	129	default:
	130	break;
	131	}
	132
	133	devc->acq_req_pending = 2;
	134	break;
	135	case 2: /* Waiting for OK after request */
	136	if (strcmp(devc->buf, "OK")) {
	137	sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
	138	}
	139	devc->acq_req_pending = 0;
	140	break;
	141	}
	142
	143	devc->buf[0] = '\0';
	144	devc->buflen = 0;
	145	}
	146
41b7bd01 MH	147	SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data)
41b7bd01 MH	148	{
1c3d002b	149	struct sr_dev_inst *sdi;
41b7bd01	150	struct dev_context *devc;
1c3d002b	151	struct sr_serial_dev_inst *serial;
1c3d002b	152	int len;
41b7bd01 MH	153
	154	(void)fd;
	155
	156	if (!(sdi = cb_data))
	157	return TRUE;
	158
	159	if (!(devc = sdi->priv))
	160	return TRUE;
	161
1c3d002b MH	162	serial = sdi->conn;
	163
	164	if (revents == G_IO_IN) { /* Serial data arrived. */
	165	while (LINELEN_MAX - devc->buflen - 2 > 0) {
e0501240	166	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
1c3d002b MH	167	if (len < 1)
	168	break;
	169
	170	/* Eliminate whitespace at beginning of line. */
	171	if (g_ascii_isspace(devc->buf[0])) {
	172	devc->buf[0] = '\0';
	173	devc->buflen = 0;
	174	continue;
	175	}
	176
1c3d002b MH	177	devc->buflen += len;
	178	devc->buf[devc->buflen] = '\0';
	179
	180	/* If line complete, process msg. */
	181	if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') \|\| devc->buf[devc->buflen-1] == '\n')) {
	182	devc->buflen--;
	183	devc->buf[devc->buflen] = '\0';
	184
	185	sr_spew("Line complete: \"%s\"", devc->buf);
	186	process_line(sdi);
	187	}
	188	}
	189	}
	190
8aafc5e6	191	if (sr_sw_limits_check(&devc->limits))
d2f7c417	192	sr_dev_acquisition_stop(sdi);
1c3d002b	193
dc89faea UH	194	/* Only request the next packet if required. */
	195	if (!((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)))
	196	return TRUE;
	197
	198	if (devc->acq_req_pending) {
6433156c	199	int64_t elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
dc89faea	200	if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
6433156c DE	201	sr_spew("Request timeout: req=%d t=%" PRIi64 "us",
6433156c DE	202	(int)devc->acq_req, elapsed_us);
dc89faea	203	devc->acq_req_pending = 0;
1c3d002b	204	}
dc89faea UH	205	}
	206
	207	if (devc->acq_req_pending == 0) {
	208	switch (devc->acq_req) {
	209	case AQ_NONE: /* Fall through */
	210	case AQ_STATUS:
	211	devc->acq_req = AQ_U1;
	212	lps_send_req(serial, "VOUT1");
	213	break;
	214	case AQ_U1:
	215	devc->acq_req = AQ_I1;
	216	lps_send_req(serial, "IOUT1");
	217	break;
	218	case AQ_I1:
	219	if (devc->model->num_channels == 1) {
1c3d002b MH	220	devc->acq_req = AQ_STATUS;
1c3d002b MH	221	lps_send_req(serial, "STATUS");
dc89faea UH	222	} else {
	223	devc->acq_req = AQ_U2;
	224	lps_send_req(serial, "VOUT2");
1c3d002b	225	}
dc89faea UH	226	break;
	227	case AQ_U2:
	228	devc->acq_req = AQ_I2;
	229	lps_send_req(serial, "IOUT2");
	230	break;
	231	case AQ_I2:
	232	devc->acq_req = AQ_STATUS;
	233	lps_send_req(serial, "STATUS");
	234	break;
	235	default:
	236	sr_err("Illegal devc->acq_req=%d", devc->acq_req);
	237	return SR_ERR;
1c3d002b	238	}
dc89faea UH	239	devc->req_sent_at = g_get_real_time();
dc89faea UH	240	devc->acq_req_pending = 1;
41b7bd01 MH	241	}
	242
	243	return TRUE;
	244	}