[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 <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;
	int i;
	float data[MAX_CHANNELS];

	devc = sdi->priv;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	analog.channels = sdi->channels;
	analog.num_samples = 1;

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

	devc->num_samples++;
}

/** 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, 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, 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;
	gdouble elapsed_s;

	(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 number of samples or time limit reached, stop acquisition. */
	if (devc->limit_samples && (devc->num_samples >= devc->limit_samples))
		sdi->driver->dev_acquisition_stop(sdi, cb_data);

	if (devc->limit_msec) {
		elapsed_s = g_timer_elapsed(devc->elapsed_msec, NULL);
		if ((elapsed_s * 1000) >= devc->limit_msec)
			sdi->driver->dev_acquisition_stop(sdi, cb_data);
	}

	/* Request next packet, if required. */
	if ((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)){
		if (devc->acq_req_pending) {
			gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
			if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
				sr_spew("Request timeout: req=%d t=%lldus", (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
	26	#include <errno.h>
	27	#include <string.h>
41b7bd01 MH	28	#include "protocol.h"
41b7bd01 MH	29
1c3d002b MH	30	/** Send data packets for current measurements. */
	31	static void send_data(struct sr_dev_inst *sdi)
	32	{
	33	struct dev_context *devc;
	34	struct sr_datafeed_packet packet;
	35	struct sr_datafeed_analog analog;
	36	int i;
	37	float data[MAX_CHANNELS];
	38
	39	devc = sdi->priv;
	40	packet.type = SR_DF_ANALOG;
	41	packet.payload = &analog;
	42	analog.channels = sdi->channels;
	43	analog.num_samples = 1;
	44
	45	analog.mq = SR_MQ_VOLTAGE;
	46	analog.unit = SR_UNIT_VOLT;
	47	analog.mqflags = SR_MQFLAG_DC;
	48	analog.data = data;
	49	for (i = 0; i < devc->model->num_channels; i++)
	50	analog.data[i] = devc->channel_status[i].output_voltage_last; /* Value always 3.3 or 5 for channel 3, if present! */
	51	sr_session_send(sdi, &packet);
	52
	53	analog.mq = SR_MQ_CURRENT;
	54	analog.unit = SR_UNIT_AMPERE;
	55	analog.mqflags = 0;
	56	analog.data = data;
	57	for (i = 0; i < devc->model->num_channels; i++)
	58	analog.data[i] = devc->channel_status[i].output_current_last; /* Value always 0 for channel 3, if present! */
	59	sr_session_send(sdi, &packet);
	60
	61	devc->num_samples++;
	62	}
	63
	64	/** Process a complete line (without CR/LF) in buf. */
	65	static void process_line(struct sr_dev_inst *sdi)
	66	{
	67	struct dev_context *devc;
1c3d002b MH	68	double dbl;
	69	int auxint;
	70
	71	devc = sdi->priv;
1c3d002b MH	72
	73	switch (devc->acq_req_pending) {
	74	case 0: /* Should not happen... */
	75	break;
	76	case 1: /* Waiting for data reply to request */
	77	/* Convert numbers */
	78	switch (devc->acq_req) {
93b118da UH	79	case AQ_U1:
	80	case AQ_U2:
	81	case AQ_I1:
	82	case AQ_I2:
1c3d002b MH	83	if (sr_atod(devc->buf, &dbl) != SR_OK) {
	84	sr_err("Failed to convert '%s' to double, errno=%d %s",
	85	devc->buf, errno, strerror(errno));
	86	dbl = 0.0;
	87	}
	88	break;
	89	case AQ_STATUS:
	90	if (sr_atoi(devc->buf, &auxint) != SR_OK) {
	91	sr_err("Failed to convert '%s' to int, errno=%d %s",
	92	devc->buf, errno, strerror(errno));
	93	auxint = 0;
	94	}
	95	break;
	96	default:
	97	break;
	98	}
	99
	100	switch (devc->acq_req) {
	101	case AQ_U1:
	102	devc->channel_status[0].output_voltage_last = dbl;
	103	break;
	104	case AQ_I1:
	105	devc->channel_status[0].output_current_last = dbl;
	106	break;
	107	case AQ_U2:
	108	devc->channel_status[1].output_voltage_last = dbl;
	109	break;
	110	case AQ_I2:
	111	devc->channel_status[1].output_current_last = dbl;
	112	break;
	113	case AQ_STATUS: /* Process status and generate data. */
	114	if (lps_process_status(sdi, auxint) == SR_OK) {
	115	send_data(sdi);
	116	}
	117	break;
	118	default:
	119	break;
	120	}
	121
	122	devc->acq_req_pending = 2;
	123	break;
	124	case 2: /* Waiting for OK after request */
	125	if (strcmp(devc->buf, "OK")) {
	126	sr_err("Unexpected reply while waiting for OK: '%s'", devc->buf);
	127	}
	128	devc->acq_req_pending = 0;
	129	break;
	130	}
	131
	132	devc->buf[0] = '\0';
	133	devc->buflen = 0;
	134	}
	135
41b7bd01 MH	136	SR_PRIV int motech_lps_30x_receive_data(int fd, int revents, void *cb_data)
41b7bd01 MH	137	{
1c3d002b	138	struct sr_dev_inst *sdi;
41b7bd01	139	struct dev_context *devc;
1c3d002b	140	struct sr_serial_dev_inst *serial;
1c3d002b MH	141	int len;
1c3d002b MH	142	gdouble elapsed_s;
41b7bd01 MH	143
	144	(void)fd;
	145
	146	if (!(sdi = cb_data))
	147	return TRUE;
	148
	149	if (!(devc = sdi->priv))
	150	return TRUE;
	151
1c3d002b MH	152	serial = sdi->conn;
	153
	154	if (revents == G_IO_IN) { /* Serial data arrived. */
	155	while (LINELEN_MAX - devc->buflen - 2 > 0) {
e0501240	156	len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
1c3d002b MH	157	if (len < 1)
	158	break;
	159
	160	/* Eliminate whitespace at beginning of line. */
	161	if (g_ascii_isspace(devc->buf[0])) {
	162	devc->buf[0] = '\0';
	163	devc->buflen = 0;
	164	continue;
	165	}
	166
1c3d002b MH	167	devc->buflen += len;
	168	devc->buf[devc->buflen] = '\0';
	169
	170	/* If line complete, process msg. */
	171	if ((devc->buflen > 0) && ((devc->buf[devc->buflen-1] == '\r') \|\| devc->buf[devc->buflen-1] == '\n')) {
	172	devc->buflen--;
	173	devc->buf[devc->buflen] = '\0';
	174
	175	sr_spew("Line complete: \"%s\"", devc->buf);
	176	process_line(sdi);
	177	}
	178	}
	179	}
	180
	181	/* If number of samples or time limit reached, stop acquisition. */
	182	if (devc->limit_samples && (devc->num_samples >= devc->limit_samples))
	183	sdi->driver->dev_acquisition_stop(sdi, cb_data);
	184
	185	if (devc->limit_msec) {
	186	elapsed_s = g_timer_elapsed(devc->elapsed_msec, NULL);
	187	if ((elapsed_s * 1000) >= devc->limit_msec)
	188	sdi->driver->dev_acquisition_stop(sdi, cb_data);
	189	}
	190
	191	/* Request next packet, if required. */
	192	if ((sdi->status == SR_ST_ACTIVE) && (devc->acq_running)){
	193	if (devc->acq_req_pending) {
	194	gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
	195	if (elapsed_us > (REQ_TIMEOUT_MS * 1000)) {
	196	sr_spew("Request timeout: req=%d t=%lldus", (int)devc->acq_req, elapsed_us);
	197	devc->acq_req_pending = 0;
	198	}
	199	}
	200	if (devc->acq_req_pending == 0) {
0c5f2abc	201	switch (devc->acq_req) {
1c3d002b MH	202	case AQ_NONE: /* Fall through */
	203	case AQ_STATUS:
	204	devc->acq_req = AQ_U1;
	205	lps_send_req(serial, "VOUT1");
	206	break;
	207	case AQ_U1:
	208	devc->acq_req = AQ_I1;
	209	lps_send_req(serial, "IOUT1");
	210	break;
	211	case AQ_I1:
	212	if (devc->model->num_channels == 1) {
	213	devc->acq_req = AQ_STATUS;
	214	lps_send_req(serial, "STATUS");
	215	} else {
	216	devc->acq_req = AQ_U2;
	217	lps_send_req(serial, "VOUT2");
	218	}
	219	break;
	220	case AQ_U2:
	221	devc->acq_req = AQ_I2;
	222	lps_send_req(serial, "IOUT2");
	223	break;
	224	case AQ_I2:
	225	devc->acq_req = AQ_STATUS;
	226	lps_send_req(serial, "STATUS");
	227	break;
	228	default:
	229	sr_err("Illegal devc->acq_req=%d", devc->acq_req);
	230	return SR_ERR;
	231	}
	232	devc->req_sent_at = g_get_real_time();
	233	devc->acq_req_pending = 1;
	234	}
41b7bd01 MH	235	}
	236
	237	return TRUE;
	238	}