[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/>.
 */

/**
 * @file
 *
 * <em>Motech LPS-30x series</em> power supply driver
 *
 * @internal
 */

#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;

	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:
			if (sr_atod(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:
			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
d9251a2c UH	21	/**
	22	* @file
	23	*
	24	* <em>Motech LPS-30x series</em> power supply driver
	25	*
	26	* @internal
1c3d002b MH	27	*/
1c3d002b MH	28
6ec6c43b	29	#include <config.h>
1c3d002b MH	30	#include <errno.h>
1c3d002b MH	31	#include <string.h>
41b7bd01 MH	32	#include "protocol.h"
41b7bd01 MH	33
1c3d002b MH	34	/** Send data packets for current measurements. */
	35	static void send_data(struct sr_dev_inst *sdi)
	36	{
	37	struct dev_context *devc;
	38	struct sr_datafeed_packet packet;
ddfe99d9 UH	39	struct sr_datafeed_analog analog;
	40	struct sr_analog_encoding encoding;
	41	struct sr_analog_meaning meaning;
	42	struct sr_analog_spec spec;
1c3d002b MH	43	int i;
	44	float data[MAX_CHANNELS];
	45
	46	devc = sdi->priv;
ddfe99d9	47	packet.type = SR_DF_ANALOG;
1c3d002b	48	packet.payload = &analog;
1c3d002b	49
869c8375	50	/* Note: digits/spec_digits will be overridden later. */
ddfe99d9 UH	51	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	52
	53	analog.meaning->channels = sdi->channels;
	54	analog.num_samples = 1;
	55	analog.meaning->mq = SR_MQ_VOLTAGE;
	56	analog.meaning->unit = SR_UNIT_VOLT;
	57	analog.meaning->mqflags = SR_MQFLAG_DC;
bcaadb36 AJ	58	analog.encoding->digits = 3;
bcaadb36 AJ	59	analog.spec->spec_digits = 2;
1c3d002b	60	analog.data = data;
ddfe99d9	61
1c3d002b	62	for (i = 0; i < devc->model->num_channels; i++)
ddfe99d9	63	((float )analog.data)[i] = devc->channel_status[i].output_voltage_last; / Value always 3.3 or 5 for channel 3, if present! */
1c3d002b MH	64	sr_session_send(sdi, &packet);
1c3d002b MH	65
ddfe99d9 UH	66	analog.meaning->mq = SR_MQ_CURRENT;
	67	analog.meaning->unit = SR_UNIT_AMPERE;
	68	analog.meaning->mqflags = 0;
bcaadb36 AJ	69	analog.encoding->digits = 4;
bcaadb36 AJ	70	analog.spec->spec_digits = 3;
1c3d002b MH	71	analog.data = data;
1c3d002b MH	72	for (i = 0; i < devc->model->num_channels; i++)
ddfe99d9	73	((float )analog.data)[i] = devc->channel_status[i].output_current_last; / Value always 0 for channel 3, if present! */
1c3d002b MH	74	sr_session_send(sdi, &packet);
1c3d002b MH	75
8aafc5e6	76	sr_sw_limits_update_samples_read(&devc->limits, 1);
1c3d002b MH	77	}
	78
	79	/** Process a complete line (without CR/LF) in buf. */
	80	static void process_line(struct sr_dev_inst *sdi)
	81	{
	82	struct dev_context *devc;
1c3d002b MH	83	double dbl;
	84	int auxint;
	85
	86	devc = sdi->priv;
1c3d002b MH	87
	88	switch (devc->acq_req_pending) {
	89	case 0: /* Should not happen... */
	90	break;
	91	case 1: /* Waiting for data reply to request */
	92	/* Convert numbers */
	93	switch (devc->acq_req) {
93b118da UH	94	case AQ_U1:
	95	case AQ_U2:
	96	case AQ_I1:
	97	case AQ_I2:
1c3d002b MH	98	if (sr_atod(devc->buf, &dbl) != SR_OK) {
1c3d002b MH	99	sr_err("Failed to convert '%s' to double, errno=%d %s",
7237e912	100	devc->buf, errno, g_strerror(errno));
1c3d002b MH	101	dbl = 0.0;
	102	}
	103	break;
	104	case AQ_STATUS:
	105	if (sr_atoi(devc->buf, &auxint) != SR_OK) {
	106	sr_err("Failed to convert '%s' to int, errno=%d %s",
7237e912	107	devc->buf, errno, g_strerror(errno));
1c3d002b MH	108	auxint = 0;
	109	}
	110	break;
	111	default:
	112	break;
	113	}
	114
	115	switch (devc->acq_req) {
	116	case AQ_U1:
	117	devc->channel_status[0].output_voltage_last = dbl;
	118	break;
	119	case AQ_I1:
	120	devc->channel_status[0].output_current_last = dbl;
	121	break;
	122	case AQ_U2:
	123	devc->channel_status[1].output_voltage_last = dbl;
	124	break;
	125	case AQ_I2:
	126	devc->channel_status[1].output_current_last = dbl;
	127	break;
	128	case AQ_STATUS: /* Process status and generate data. */
	129	if (lps_process_status(sdi, auxint) == SR_OK) {
	130	send_data(sdi);
	131	}
	132	break;
	133	default:
	134	break;
	135	}
	136
	137	devc->acq_req_pending = 2;
	138	break;
	139	case 2: /* Waiting for OK after request */
	140	if (strcmp(devc->buf, "OK")) {
	141	sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
	142	}
	143	devc->acq_req_pending = 0;
	144	break;
	145	}
	146
	147	devc->buf[0] = '\0';
	148	devc->buflen = 0;
	149	}
	150
41b7bd01 MH	151	SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data)
41b7bd01 MH	152	{
1c3d002b	153	struct sr_dev_inst *sdi;
41b7bd01	154	struct dev_context *devc;
1c3d002b	155	struct sr_serial_dev_inst *serial;
1c3d002b	156	int len;
41b7bd01 MH	157
	158	(void)fd;
	159
	160	if (!(sdi = cb_data))
	161	return TRUE;
	162
	163	if (!(devc = sdi->priv))
	164	return TRUE;
	165
1c3d002b MH	166	serial = sdi->conn;
	167
	168	if (revents == G_IO_IN) { /* Serial data arrived. */
	169	while (LINELEN_MAX - devc->buflen - 2 > 0) {
e0501240	170	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
1c3d002b MH	171	if (len < 1)
	172	break;
	173
	174	/* Eliminate whitespace at beginning of line. */
	175	if (g_ascii_isspace(devc->buf[0])) {
	176	devc->buf[0] = '\0';
	177	devc->buflen = 0;
	178	continue;
	179	}
	180
1c3d002b MH	181	devc->buflen += len;
	182	devc->buf[devc->buflen] = '\0';
	183
	184	/* If line complete, process msg. */
	185	if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') \|\| devc->buf[devc->buflen-1] == '\n')) {
	186	devc->buflen--;
	187	devc->buf[devc->buflen] = '\0';
	188
	189	sr_spew("Line complete: \"%s\"", devc->buf);
	190	process_line(sdi);
	191	}
	192	}
	193	}
	194
8aafc5e6	195	if (sr_sw_limits_check(&devc->limits))
d2f7c417	196	sr_dev_acquisition_stop(sdi);
1c3d002b	197
dc89faea UH	198	/* Only request the next packet if required. */
	199	if (!((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)))
	200	return TRUE;
	201
	202	if (devc->acq_req_pending) {
6433156c	203	int64_t elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
dc89faea	204	if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
6433156c DE	205	sr_spew("Request timeout: req=%d t=%" PRIi64 "us",
6433156c DE	206	(int)devc->acq_req, elapsed_us);
dc89faea	207	devc->acq_req_pending = 0;
1c3d002b	208	}
dc89faea UH	209	}
	210
	211	if (devc->acq_req_pending == 0) {
	212	switch (devc->acq_req) {
	213	case AQ_NONE: /* Fall through */
	214	case AQ_STATUS:
	215	devc->acq_req = AQ_U1;
	216	lps_send_req(serial, "VOUT1");
	217	break;
	218	case AQ_U1:
	219	devc->acq_req = AQ_I1;
	220	lps_send_req(serial, "IOUT1");
	221	break;
	222	case AQ_I1:
	223	if (devc->model->num_channels == 1) {
1c3d002b MH	224	devc->acq_req = AQ_STATUS;
1c3d002b MH	225	lps_send_req(serial, "STATUS");
dc89faea UH	226	} else {
	227	devc->acq_req = AQ_U2;
	228	lps_send_req(serial, "VOUT2");
1c3d002b	229	}
dc89faea UH	230	break;
	231	case AQ_U2:
	232	devc->acq_req = AQ_I2;
	233	lps_send_req(serial, "IOUT2");
	234	break;
	235	case AQ_I2:
	236	devc->acq_req = AQ_STATUS;
	237	lps_send_req(serial, "STATUS");
	238	break;
	239	default:
	240	sr_err("Illegal devc->acq_req=%d", devc->acq_req);
	241	return SR_ERR;
1c3d002b	242	}
dc89faea UH	243	devc->req_sent_at = g_get_real_time();
dc89faea UH	244	devc->acq_req_pending = 1;
41b7bd01 MH	245	}
	246
	247	return TRUE;
	248	}