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