[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))
		sdi->driver->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
1c3d002b MH	21	/** @file
	22	* <em>Motech LPS-30x series</em> power supply driver
	23	* @internal
	24	*/
	25
6ec6c43b	26	#include <config.h>
1c3d002b MH	27	#include <errno.h>
1c3d002b MH	28	#include <string.h>
41b7bd01 MH	29	#include "protocol.h"
41b7bd01 MH	30
1c3d002b MH	31	/** Send data packets for current measurements. */
	32	static void send_data(struct sr_dev_inst *sdi)
	33	{
	34	struct dev_context *devc;
	35	struct sr_datafeed_packet packet;
ddfe99d9 UH	36	struct sr_datafeed_analog analog;
	37	struct sr_analog_encoding encoding;
	38	struct sr_analog_meaning meaning;
	39	struct sr_analog_spec spec;
1c3d002b MH	40	int i;
	41	float data[MAX_CHANNELS];
	42
	43	devc = sdi->priv;
ddfe99d9	44	packet.type = SR_DF_ANALOG;
1c3d002b	45	packet.payload = &analog;
1c3d002b	46
869c8375	47	/* Note: digits/spec_digits will be overridden later. */
ddfe99d9 UH	48	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	49
	50	analog.meaning->channels = sdi->channels;
	51	analog.num_samples = 1;
	52	analog.meaning->mq = SR_MQ_VOLTAGE;
	53	analog.meaning->unit = SR_UNIT_VOLT;
	54	analog.meaning->mqflags = SR_MQFLAG_DC;
bcaadb36 AJ	55	analog.encoding->digits = 3;
bcaadb36 AJ	56	analog.spec->spec_digits = 2;
1c3d002b	57	analog.data = data;
ddfe99d9	58
1c3d002b	59	for (i = 0; i < devc->model->num_channels; i++)
ddfe99d9	60	((float )analog.data)[i] = devc->channel_status[i].output_voltage_last; / Value always 3.3 or 5 for channel 3, if present! */
1c3d002b MH	61	sr_session_send(sdi, &packet);
1c3d002b MH	62
ddfe99d9 UH	63	analog.meaning->mq = SR_MQ_CURRENT;
	64	analog.meaning->unit = SR_UNIT_AMPERE;
	65	analog.meaning->mqflags = 0;
bcaadb36 AJ	66	analog.encoding->digits = 4;
bcaadb36 AJ	67	analog.spec->spec_digits = 3;
1c3d002b MH	68	analog.data = data;
1c3d002b MH	69	for (i = 0; i < devc->model->num_channels; i++)
ddfe99d9	70	((float )analog.data)[i] = devc->channel_status[i].output_current_last; / Value always 0 for channel 3, if present! */
1c3d002b MH	71	sr_session_send(sdi, &packet);
1c3d002b MH	72
8aafc5e6	73	sr_sw_limits_update_samples_read(&devc->limits, 1);
1c3d002b MH	74	}
	75
	76	/** Process a complete line (without CR/LF) in buf. */
	77	static void process_line(struct sr_dev_inst *sdi)
	78	{
	79	struct dev_context *devc;
1c3d002b MH	80	double dbl;
	81	int auxint;
	82
	83	devc = sdi->priv;
1c3d002b MH	84
	85	switch (devc->acq_req_pending) {
	86	case 0: /* Should not happen... */
	87	break;
	88	case 1: /* Waiting for data reply to request */
	89	/* Convert numbers */
	90	switch (devc->acq_req) {
93b118da UH	91	case AQ_U1:
	92	case AQ_U2:
	93	case AQ_I1:
	94	case AQ_I2:
1c3d002b MH	95	if (sr_atod(devc->buf, &dbl) != SR_OK) {
1c3d002b MH	96	sr_err("Failed to convert '%s' to double, errno=%d %s",
7237e912	97	devc->buf, errno, g_strerror(errno));
1c3d002b MH	98	dbl = 0.0;
	99	}
	100	break;
	101	case AQ_STATUS:
	102	if (sr_atoi(devc->buf, &auxint) != SR_OK) {
	103	sr_err("Failed to convert '%s' to int, errno=%d %s",
7237e912	104	devc->buf, errno, g_strerror(errno));
1c3d002b MH	105	auxint = 0;
	106	}
	107	break;
	108	default:
	109	break;
	110	}
	111
	112	switch (devc->acq_req) {
	113	case AQ_U1:
	114	devc->channel_status[0].output_voltage_last = dbl;
	115	break;
	116	case AQ_I1:
	117	devc->channel_status[0].output_current_last = dbl;
	118	break;
	119	case AQ_U2:
	120	devc->channel_status[1].output_voltage_last = dbl;
	121	break;
	122	case AQ_I2:
	123	devc->channel_status[1].output_current_last = dbl;
	124	break;
	125	case AQ_STATUS: /* Process status and generate data. */
	126	if (lps_process_status(sdi, auxint) == SR_OK) {
	127	send_data(sdi);
	128	}
	129	break;
	130	default:
	131	break;
	132	}
	133
	134	devc->acq_req_pending = 2;
	135	break;
	136	case 2: /* Waiting for OK after request */
	137	if (strcmp(devc->buf, "OK")) {
	138	sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
	139	}
	140	devc->acq_req_pending = 0;
	141	break;
	142	}
	143
	144	devc->buf[0] = '\0';
	145	devc->buflen = 0;
	146	}
	147
41b7bd01 MH	148	SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data)
41b7bd01 MH	149	{
1c3d002b	150	struct sr_dev_inst *sdi;
41b7bd01	151	struct dev_context *devc;
1c3d002b	152	struct sr_serial_dev_inst *serial;
1c3d002b	153	int len;
41b7bd01 MH	154
	155	(void)fd;
	156
	157	if (!(sdi = cb_data))
	158	return TRUE;
	159
	160	if (!(devc = sdi->priv))
	161	return TRUE;
	162
1c3d002b MH	163	serial = sdi->conn;
	164
	165	if (revents == G_IO_IN) { /* Serial data arrived. */
	166	while (LINELEN_MAX - devc->buflen - 2 > 0) {
e0501240	167	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
1c3d002b MH	168	if (len < 1)
	169	break;
	170
	171	/* Eliminate whitespace at beginning of line. */
	172	if (g_ascii_isspace(devc->buf[0])) {
	173	devc->buf[0] = '\0';
	174	devc->buflen = 0;
	175	continue;
	176	}
	177
1c3d002b MH	178	devc->buflen += len;
	179	devc->buf[devc->buflen] = '\0';
	180
	181	/* If line complete, process msg. */
	182	if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') \|\| devc->buf[devc->buflen-1] == '\n')) {
	183	devc->buflen--;
	184	devc->buf[devc->buflen] = '\0';
	185
	186	sr_spew("Line complete: \"%s\"", devc->buf);
	187	process_line(sdi);
	188	}
	189	}
	190	}
	191
8aafc5e6	192	if (sr_sw_limits_check(&devc->limits))
695dc859	193	sdi->driver->dev_acquisition_stop(sdi);
1c3d002b	194
dc89faea UH	195	/* Only request the next packet if required. */
	196	if (!((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)))
	197	return TRUE;
	198
	199	if (devc->acq_req_pending) {
6433156c	200	int64_t elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
dc89faea	201	if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
6433156c DE	202	sr_spew("Request timeout: req=%d t=%" PRIi64 "us",
6433156c DE	203	(int)devc->acq_req, elapsed_us);
dc89faea	204	devc->acq_req_pending = 0;
1c3d002b	205	}
dc89faea UH	206	}
	207
	208	if (devc->acq_req_pending == 0) {
	209	switch (devc->acq_req) {
	210	case AQ_NONE: /* Fall through */
	211	case AQ_STATUS:
	212	devc->acq_req = AQ_U1;
	213	lps_send_req(serial, "VOUT1");
	214	break;
	215	case AQ_U1:
	216	devc->acq_req = AQ_I1;
	217	lps_send_req(serial, "IOUT1");
	218	break;
	219	case AQ_I1:
	220	if (devc->model->num_channels == 1) {
1c3d002b MH	221	devc->acq_req = AQ_STATUS;
1c3d002b MH	222	lps_send_req(serial, "STATUS");
dc89faea UH	223	} else {
	224	devc->acq_req = AQ_U2;
	225	lps_send_req(serial, "VOUT2");
1c3d002b	226	}
dc89faea UH	227	break;
	228	case AQ_U2:
	229	devc->acq_req = AQ_I2;
	230	lps_send_req(serial, "IOUT2");
	231	break;
	232	case AQ_I2:
	233	devc->acq_req = AQ_STATUS;
	234	lps_send_req(serial, "STATUS");
	235	break;
	236	default:
	237	sr_err("Illegal devc->acq_req=%d", devc->acq_req);
	238	return SR_ERR;
1c3d002b	239	}
dc89faea UH	240	devc->req_sent_at = g_get_real_time();
dc89faea UH	241	devc->acq_req_pending = 1;
41b7bd01 MH	242	}
	243
	244	return TRUE;
	245	}