[libsigrok.git] / src / hardware / korad-kaxxxxp / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2015 Hannu Vuolasaho <vuokkosetae@gmail.com>
 * Copyright (C) 2018 Frank Stettner <frank-stettner@gmx.net>
 *
 * 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 "protocol.h"

#define REQ_TIMEOUT_MS 500
#define DEVICE_PROCESSING_TIME_MS 80

SR_PRIV int korad_kaxxxxp_send_cmd(struct sr_serial_dev_inst *serial,
				const char *cmd)
{
	int ret;

	sr_dbg("Sending '%s'.", cmd);
	if ((ret = serial_write_blocking(serial, cmd, strlen(cmd), 0)) < 0) {
		sr_err("Error sending command: %d.", ret);
		return ret;
	}

	return ret;
}

SR_PRIV int korad_kaxxxxp_read_chars(struct sr_serial_dev_inst *serial,
				int count, char *buf)
{
	int ret, received, turns;

	received = 0;
	turns = 0;

	do {
		if ((ret = serial_read_blocking(serial, buf + received,
				count - received,
				serial_timeout(serial, count))) < 0) {
			sr_err("Error %d reading %d bytes from device.",
			       ret, count);
			return ret;
		}
		received += ret;
		turns++;
	} while ((received < count) && (turns < 100));

	buf[count] = 0;

	sr_spew("Received: '%s'.", buf);

	return ret;
}

static void give_device_time_to_process(struct dev_context *devc)
{
	int64_t sleeping_time;

	sleeping_time = devc->req_sent_at + (DEVICE_PROCESSING_TIME_MS * 1000);
	sleeping_time -= g_get_monotonic_time();

	if (sleeping_time > 0) {
		g_usleep(sleeping_time);
		sr_spew("Sleeping for processing %" PRIi64 " usec", sleeping_time);
	}
}

SR_PRIV int korad_kaxxxxp_set_value(struct sr_serial_dev_inst *serial,
				int target, struct dev_context *devc)
{
	char *msg;
	const char *cmd;
	float value;
	int ret;

	g_mutex_lock(&devc->rw_mutex);
	give_device_time_to_process(devc);

	switch (target) {
	case KAXXXXP_CURRENT:
	case KAXXXXP_VOLTAGE:
	case KAXXXXP_STATUS:
		sr_err("Can't set measurable parameter %d.", target);
		g_mutex_unlock(&devc->rw_mutex);
		return SR_ERR;
	case KAXXXXP_CURRENT_MAX:
		cmd = "ISET1:%05.3f";
		value = devc->current_max;
		break;
	case KAXXXXP_VOLTAGE_MAX:
		cmd = "VSET1:%05.2f";
		value = devc->voltage_max;
		break;
	case KAXXXXP_OUTPUT:
		cmd = "OUT%01.0f";
		value = (devc->output_enabled) ? 1 : 0;
		break;
	case KAXXXXP_BEEP:
		cmd = "BEEP%01.0f";
		value = (devc->beep_enabled) ? 1 : 0;
		break;
	case KAXXXXP_OCP:
		cmd = "OCP%01.0f";
		value = (devc->ocp_enabled) ? 1 : 0;
		break;
	case KAXXXXP_OVP:
		cmd = "OVP%01.0f";
		value = (devc->ovp_enabled) ? 1 : 0;
		break;
	case KAXXXXP_SAVE:
		cmd = "SAV%01.0f";
		if (devc->program < 1 || devc->program > 5) {
			sr_err("Only programs 1-5 supported and %d isn't "
			       "between them.", devc->program);
			g_mutex_unlock(&devc->rw_mutex);
			return SR_ERR;
		}
		value = devc->program;
		break;
	case KAXXXXP_RECALL:
		cmd = "RCL%01.0f";
		if (devc->program < 1 || devc->program > 5) {
			sr_err("Only programs 1-5 supported and %d isn't "
			       "between them.", devc->program);
			g_mutex_unlock(&devc->rw_mutex);
			return SR_ERR;
		}
		value = devc->program;
		break;
	default:
		sr_err("Don't know how to set %d.", target);
		g_mutex_unlock(&devc->rw_mutex);
		return SR_ERR;
	}

	msg = g_malloc0(20 + 1);
	if (cmd)
		sr_snprintf_ascii(msg, 20, cmd, value);

	ret = korad_kaxxxxp_send_cmd(serial, msg);
	devc->req_sent_at = g_get_monotonic_time();
	g_free(msg);

	g_mutex_unlock(&devc->rw_mutex);

	return ret;
}

SR_PRIV int korad_kaxxxxp_get_value(struct sr_serial_dev_inst *serial,
				int target, struct dev_context *devc)
{
	int ret, count;
	char reply[6];
	float *value;
	char status_byte;

	g_mutex_lock(&devc->rw_mutex);
	give_device_time_to_process(devc);

	value = NULL;
	count = 5;

	switch (target) {
	case KAXXXXP_CURRENT:
		/* Read current from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "IOUT1?");
		value = &(devc->current);
		break;
	case KAXXXXP_CURRENT_MAX:
		/* Read set current from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "ISET1?");
		value = &(devc->current_max);
		break;
	case KAXXXXP_VOLTAGE:
		/* Read voltage from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "VOUT1?");
		value = &(devc->voltage);
		break;
	case KAXXXXP_VOLTAGE_MAX:
		/* Read set voltage from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "VSET1?");
		value = &(devc->voltage_max);
		break;
	case KAXXXXP_STATUS:
	case KAXXXXP_OUTPUT:
	case KAXXXXP_OCP:
	case KAXXXXP_OVP:
		/* Read status from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "STATUS?");
		count = 1;
		break;
	default:
		sr_err("Don't know how to query %d.", target);
		g_mutex_unlock(&devc->rw_mutex);
		return SR_ERR;
	}

	devc->req_sent_at = g_get_monotonic_time();

	if ((ret = korad_kaxxxxp_read_chars(serial, count, reply)) < 0) {
		g_mutex_unlock(&devc->rw_mutex);
		return ret;
	}

	reply[count] = 0;

	if (value) {
		sr_atof_ascii((const char *)&reply, value);
		sr_dbg("value: %f", *value);
	} else {
		/* We have status reply. */
		status_byte = reply[0];
		/* Constant current */
		devc->cc_mode[0] = !(status_byte & (1 << 0)); /* Channel one */
		devc->cc_mode[1] = !(status_byte & (1 << 1)); /* Channel two */
		/*
		 * Tracking
		 * status_byte & ((1 << 2) | (1 << 3))
		 * 00 independent 01 series 11 parallel
		 */
		devc->beep_enabled = (1 << 4);
		devc->ocp_enabled = (status_byte & (1 << 5));
		devc->output_enabled = (status_byte & (1 << 6));
		/* Velleman LABPS3005 quirk */
		if (devc->output_enabled)
			devc->ovp_enabled = (status_byte & (1 << 7));
		sr_dbg("Status: 0x%02x", status_byte);
		sr_spew("Status: CH1: constant %s CH2: constant %s. "
			"Tracking would be %s. Device is "
			"%s and %s. Buttons are %s. Output is %s "
			"and extra byte is %s.",
			(status_byte & (1 << 0)) ? "voltage" : "current",
			(status_byte & (1 << 1)) ? "voltage" : "current",
			(status_byte & (1 << 2)) ? "parallel" : "series",
			(status_byte & (1 << 3)) ? "tracking" : "independent",
			(status_byte & (1 << 4)) ? "beeping" : "silent",
			(status_byte & (1 << 5)) ? "locked" : "unlocked",
			(status_byte & (1 << 6)) ? "enabled" : "disabled",
			(status_byte & (1 << 7)) ? "true" : "false");
	}

	/* Read the sixth byte from ISET? BUG workaround. */
	if (target == KAXXXXP_CURRENT_MAX)
		serial_read_blocking(serial, &status_byte, 1, 10);

	g_mutex_unlock(&devc->rw_mutex);

	return ret;
}

SR_PRIV int korad_kaxxxxp_get_all_values(struct sr_serial_dev_inst *serial,
				struct dev_context *devc)
{
	int ret, target;

	for (target = KAXXXXP_CURRENT;
			target <= KAXXXXP_STATUS; target++) {
		if ((ret = korad_kaxxxxp_get_value(serial, target, devc)) < 0)
			return ret;
	}

	return ret;
}

static void next_measurement(struct dev_context *devc)
{
	switch (devc->acquisition_target) {
	case KAXXXXP_CURRENT:
		devc->acquisition_target = KAXXXXP_VOLTAGE;
		break;
	case KAXXXXP_VOLTAGE:
		devc->acquisition_target = KAXXXXP_STATUS;
		break;
	case KAXXXXP_STATUS:
		devc->acquisition_target = KAXXXXP_CURRENT;
		break;
	default:
		devc->acquisition_target = KAXXXXP_CURRENT;
		sr_err("Invalid target for next acquisition.");
	}
}

SR_PRIV int korad_kaxxxxp_receive_data(int fd, int revents, void *cb_data)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	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;
	GSList *l;

	(void)fd;
	(void)revents;

	if (!(sdi = cb_data))
		return TRUE;

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

	serial = sdi->conn;

	/* Get the value. */
	korad_kaxxxxp_get_value(serial, devc->acquisition_target, devc);

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

	/* Send the value forward. */
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	analog.num_samples = 1;
	l = g_slist_copy(sdi->channels);
	if (devc->acquisition_target == KAXXXXP_CURRENT) {
		l = g_slist_remove_link(l, g_slist_nth(l, 0));
		analog.meaning->channels = l;
		analog.meaning->mq = SR_MQ_CURRENT;
		analog.meaning->unit = SR_UNIT_AMPERE;
		analog.meaning->mqflags = 0;
		analog.encoding->digits = 3;
		analog.spec->spec_digits = 3;
		analog.data = &devc->current;
		sr_session_send(sdi, &packet);
	} else if (devc->acquisition_target == KAXXXXP_VOLTAGE) {
		l = g_slist_remove_link(l, g_slist_nth(l, 1));
		analog.meaning->channels = l;
		analog.meaning->mq = SR_MQ_VOLTAGE;
		analog.meaning->unit = SR_UNIT_VOLT;
		analog.meaning->mqflags = SR_MQFLAG_DC;
		analog.encoding->digits = 2;
		analog.spec->spec_digits = 2;
		analog.data = &devc->voltage;
		sr_session_send(sdi, &packet);
		sr_sw_limits_update_samples_read(&devc->limits, 1);
	}
	next_measurement(devc);

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

	return TRUE;
}
Commit	Line	Data
e75ee7de HV	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2015 Hannu Vuolasaho <vuokkosetae@gmail.com>
3f9b48ae	5	* Copyright (C) 2018 Frank Stettner <frank-stettner@gmx.net>
e75ee7de HV	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
	21	#include <config.h>
	22	#include "protocol.h"
	23
d7083042 HV	24	#define REQ_TIMEOUT_MS 500
	25	#define DEVICE_PROCESSING_TIME_MS 80
	26
16fc7ee2	27	SR_PRIV int korad_kaxxxxp_send_cmd(struct sr_serial_dev_inst *serial,
d7083042 HV	28	const char *cmd)
	29	{
	30	int ret;
	31
	32	sr_dbg("Sending '%s'.", cmd);
	33	if ((ret = serial_write_blocking(serial, cmd, strlen(cmd), 0)) < 0) {
	34	sr_err("Error sending command: %d.", ret);
	35	return ret;
	36	}
	37
	38	return ret;
	39	}
	40
16fc7ee2	41	SR_PRIV int korad_kaxxxxp_read_chars(struct sr_serial_dev_inst *serial,
d7083042 HV	42	int count, char *buf)
	43	{
	44	int ret, received, turns;
	45
	46	received = 0;
	47	turns = 0;
	48
	49	do {
	50	if ((ret = serial_read_blocking(serial, buf + received,
	51	count - received,
	52	serial_timeout(serial, count))) < 0) {
	53	sr_err("Error %d reading %d bytes from device.",
	54	ret, count);
	55	return ret;
	56	}
	57	received += ret;
	58	turns++;
	59	} while ((received < count) && (turns < 100));
	60
	61	buf[count] = 0;
	62
	63	sr_spew("Received: '%s'.", buf);
	64
	65	return ret;
	66	}
	67
	68	static void give_device_time_to_process(struct dev_context *devc)
	69	{
	70	int64_t sleeping_time;
	71
	72	sleeping_time = devc->req_sent_at + (DEVICE_PROCESSING_TIME_MS * 1000);
	73	sleeping_time -= g_get_monotonic_time();
	74
	75	if (sleeping_time > 0) {
	76	g_usleep(sleeping_time);
ef2bcf11	77	sr_spew("Sleeping for processing %" PRIi64 " usec", sleeping_time);
d7083042 HV	78	}
	79	}
	80
16fc7ee2	81	SR_PRIV int korad_kaxxxxp_set_value(struct sr_serial_dev_inst *serial,
3f9b48ae	82	int target, struct dev_context *devc)
d7083042	83	{
8f39d569	84	char *msg;
2c240774	85	const char *cmd;
d7083042 HV	86	float value;
	87	int ret;
	88
3f9b48ae	89	g_mutex_lock(&devc->rw_mutex);
d7083042 HV	90	give_device_time_to_process(devc);
d7083042 HV	91
3f9b48ae	92	switch (target) {
16fc7ee2 UH	93	case KAXXXXP_CURRENT:
	94	case KAXXXXP_VOLTAGE:
	95	case KAXXXXP_STATUS:
3f9b48ae FS	96	sr_err("Can't set measurable parameter %d.", target);
3f9b48ae FS	97	g_mutex_unlock(&devc->rw_mutex);
d7083042	98	return SR_ERR;
16fc7ee2	99	case KAXXXXP_CURRENT_MAX:
d7083042 HV	100	cmd = "ISET1:%05.3f";
	101	value = devc->current_max;
	102	break;
16fc7ee2	103	case KAXXXXP_VOLTAGE_MAX:
d7083042 HV	104	cmd = "VSET1:%05.2f";
	105	value = devc->voltage_max;
	106	break;
16fc7ee2	107	case KAXXXXP_OUTPUT:
d7083042 HV	108	cmd = "OUT%01.0f";
	109	value = (devc->output_enabled) ? 1 : 0;
	110	break;
16fc7ee2	111	case KAXXXXP_BEEP:
d7083042 HV	112	cmd = "BEEP%01.0f";
	113	value = (devc->beep_enabled) ? 1 : 0;
	114	break;
16fc7ee2	115	case KAXXXXP_OCP:
c40ed60f	116	cmd = "OCP%01.0f";
9e5366df	117	value = (devc->ocp_enabled) ? 1 : 0;
c40ed60f	118	break;
16fc7ee2	119	case KAXXXXP_OVP:
c40ed60f	120	cmd = "OVP%01.0f";
9e5366df	121	value = (devc->ovp_enabled) ? 1 : 0;
c40ed60f	122	break;
16fc7ee2	123	case KAXXXXP_SAVE:
d7083042 HV	124	cmd = "SAV%01.0f";
	125	if (devc->program < 1 \|\| devc->program > 5) {
	126	sr_err("Only programs 1-5 supported and %d isn't "
	127	"between them.", devc->program);
3f9b48ae	128	g_mutex_unlock(&devc->rw_mutex);
d7083042 HV	129	return SR_ERR;
	130	}
	131	value = devc->program;
	132	break;
16fc7ee2	133	case KAXXXXP_RECALL:
d7083042 HV	134	cmd = "RCL%01.0f";
	135	if (devc->program < 1 \|\| devc->program > 5) {
	136	sr_err("Only programs 1-5 supported and %d isn't "
	137	"between them.", devc->program);
3f9b48ae	138	g_mutex_unlock(&devc->rw_mutex);
d7083042 HV	139	return SR_ERR;
	140	}
	141	value = devc->program;
	142	break;
	143	default:
3f9b48ae FS	144	sr_err("Don't know how to set %d.", target);
3f9b48ae FS	145	g_mutex_unlock(&devc->rw_mutex);
d7083042 HV	146	return SR_ERR;
	147	}
	148
8f39d569	149	msg = g_malloc0(20 + 1);
d7083042	150	if (cmd)
8f39d569	151	sr_snprintf_ascii(msg, 20, cmd, value);
d7083042	152
16fc7ee2	153	ret = korad_kaxxxxp_send_cmd(serial, msg);
d7083042	154	devc->req_sent_at = g_get_monotonic_time();
8f39d569	155	g_free(msg);
3f9b48ae FS	156
3f9b48ae FS	157	g_mutex_unlock(&devc->rw_mutex);
d7083042 HV	158
	159	return ret;
	160	}
	161
3f9b48ae FS	162	SR_PRIV int korad_kaxxxxp_get_value(struct sr_serial_dev_inst *serial,
3f9b48ae FS	163	int target, struct dev_context *devc)
d7083042	164	{
3f9b48ae FS	165	int ret, count;
	166	char reply[6];
	167	float *value;
	168	char status_byte;
d7083042	169
3f9b48ae	170	g_mutex_lock(&devc->rw_mutex);
d7083042 HV	171	give_device_time_to_process(devc);
d7083042 HV	172
3f9b48ae FS	173	value = NULL;
	174	count = 5;
	175
	176	switch (target) {
16fc7ee2	177	case KAXXXXP_CURRENT:
d7083042	178	/* Read current from device. */
16fc7ee2	179	ret = korad_kaxxxxp_send_cmd(serial, "IOUT1?");
3f9b48ae	180	value = &(devc->current);
d7083042	181	break;
16fc7ee2	182	case KAXXXXP_CURRENT_MAX:
d7083042	183	/* Read set current from device. */
16fc7ee2	184	ret = korad_kaxxxxp_send_cmd(serial, "ISET1?");
3f9b48ae	185	value = &(devc->current_max);
d7083042	186	break;
16fc7ee2	187	case KAXXXXP_VOLTAGE:
d7083042	188	/* Read voltage from device. */
16fc7ee2	189	ret = korad_kaxxxxp_send_cmd(serial, "VOUT1?");
3f9b48ae	190	value = &(devc->voltage);
d7083042	191	break;
16fc7ee2	192	case KAXXXXP_VOLTAGE_MAX:
d7083042	193	/* Read set voltage from device. */
16fc7ee2	194	ret = korad_kaxxxxp_send_cmd(serial, "VSET1?");
3f9b48ae	195	value = &(devc->voltage_max);
d7083042	196	break;
16fc7ee2 UH	197	case KAXXXXP_STATUS:
16fc7ee2 UH	198	case KAXXXXP_OUTPUT:
3f9b48ae FS	199	case KAXXXXP_OCP:
3f9b48ae FS	200	case KAXXXXP_OVP:
d7083042	201	/* Read status from device. */
16fc7ee2	202	ret = korad_kaxxxxp_send_cmd(serial, "STATUS?");
3f9b48ae	203	count = 1;
d7083042 HV	204	break;
d7083042 HV	205	default:
3f9b48ae FS	206	sr_err("Don't know how to query %d.", target);
3f9b48ae FS	207	g_mutex_unlock(&devc->rw_mutex);
d7083042 HV	208	return SR_ERR;
	209	}
	210
	211	devc->req_sent_at = g_get_monotonic_time();
d7083042	212
3f9b48ae FS	213	if ((ret = korad_kaxxxxp_read_chars(serial, count, reply)) < 0) {
3f9b48ae FS	214	g_mutex_unlock(&devc->rw_mutex);
d7083042	215	return ret;
3f9b48ae	216	}
d7083042	217
3f9b48ae	218	reply[count] = 0;
d7083042	219
3f9b48ae FS	220	if (value) {
	221	sr_atof_ascii((const char *)&reply, value);
	222	sr_dbg("value: %f", *value);
d7083042 HV	223	} else {
d7083042 HV	224	/* We have status reply. */
3f9b48ae	225	status_byte = reply[0];
d7083042 HV	226	/* Constant current */
	227	devc->cc_mode[0] = !(status_byte & (1 << 0)); /* Channel one */
	228	devc->cc_mode[1] = !(status_byte & (1 << 1)); /* Channel two */
	229	/*
	230	* Tracking
	231	* status_byte & ((1 << 2) \| (1 << 3))
	232	* 00 independent 01 series 11 parallel
	233	*/
	234	devc->beep_enabled = (1 << 4);
9e5366df	235	devc->ocp_enabled = (status_byte & (1 << 5));
d7083042	236	devc->output_enabled = (status_byte & (1 << 6));
c40ed60f HV	237	/* Velleman LABPS3005 quirk */
c40ed60f HV	238	if (devc->output_enabled)
9e5366df	239	devc->ovp_enabled = (status_byte & (1 << 7));
d7083042	240	sr_dbg("Status: 0x%02x", status_byte);
c40ed60f HV	241	sr_spew("Status: CH1: constant %s CH2: constant %s. "
	242	"Tracking would be %s. Device is "
	243	"%s and %s. Buttons are %s. Output is %s "
	244	"and extra byte is %s.",
d7083042 HV	245	(status_byte & (1 << 0)) ? "voltage" : "current",
d7083042 HV	246	(status_byte & (1 << 1)) ? "voltage" : "current",
c40ed60f	247	(status_byte & (1 << 2)) ? "parallel" : "series",
d7083042 HV	248	(status_byte & (1 << 3)) ? "tracking" : "independent",
	249	(status_byte & (1 << 4)) ? "beeping" : "silent",
	250	(status_byte & (1 << 5)) ? "locked" : "unlocked",
c40ed60f HV	251	(status_byte & (1 << 6)) ? "enabled" : "disabled",
c40ed60f HV	252	(status_byte & (1 << 7)) ? "true" : "false");
d7083042	253	}
3f9b48ae	254
8abdf006	255	/* Read the sixth byte from ISET? BUG workaround. */
3f9b48ae	256	if (target == KAXXXXP_CURRENT_MAX)
8abdf006	257	serial_read_blocking(serial, &status_byte, 1, 10);
3f9b48ae FS	258
	259	g_mutex_unlock(&devc->rw_mutex);
	260
	261	return ret;
	262	}
	263
	264	SR_PRIV int korad_kaxxxxp_get_all_values(struct sr_serial_dev_inst *serial,
	265	struct dev_context *devc)
	266	{
	267	int ret, target;
	268
	269	for (target = KAXXXXP_CURRENT;
	270	target <= KAXXXXP_STATUS; target++) {
	271	if ((ret = korad_kaxxxxp_get_value(serial, target, devc)) < 0)
	272	return ret;
	273	}
d7083042 HV	274
	275	return ret;
	276	}
	277
	278	static void next_measurement(struct dev_context *devc)
	279	{
3f9b48ae	280	switch (devc->acquisition_target) {
16fc7ee2	281	case KAXXXXP_CURRENT:
3f9b48ae	282	devc->acquisition_target = KAXXXXP_VOLTAGE;
d7083042	283	break;
16fc7ee2	284	case KAXXXXP_VOLTAGE:
3f9b48ae	285	devc->acquisition_target = KAXXXXP_STATUS;
d7083042	286	break;
16fc7ee2	287	case KAXXXXP_STATUS:
3f9b48ae	288	devc->acquisition_target = KAXXXXP_CURRENT;
d7083042 HV	289	break;
d7083042 HV	290	default:
3f9b48ae FS	291	devc->acquisition_target = KAXXXXP_CURRENT;
3f9b48ae FS	292	sr_err("Invalid target for next acquisition.");
d7083042 HV	293	}
	294	}
	295
16fc7ee2	296	SR_PRIV int korad_kaxxxxp_receive_data(int fd, int revents, void *cb_data)
e75ee7de	297	{
d7083042	298	struct sr_dev_inst *sdi;
e75ee7de	299	struct dev_context *devc;
d7083042 HV	300	struct sr_serial_dev_inst *serial;
d7083042 HV	301	struct sr_datafeed_packet packet;
2e715341 UH	302	struct sr_datafeed_analog analog;
	303	struct sr_analog_encoding encoding;
	304	struct sr_analog_meaning meaning;
	305	struct sr_analog_spec spec;
23165d7b	306	GSList *l;
e75ee7de HV	307
e75ee7de HV	308	(void)fd;
a7e48f3c	309	(void)revents;
e75ee7de HV	310
	311	if (!(sdi = cb_data))
	312	return TRUE;
	313
	314	if (!(devc = sdi->priv))
	315	return TRUE;
	316
d7083042 HV	317	serial = sdi->conn;
d7083042 HV	318
a7e48f3c FS	319	/* Get the value. */
	320	korad_kaxxxxp_get_value(serial, devc->acquisition_target, devc);
	321
	322	/* Note: digits/spec_digits will be overridden later. */
	323	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	324
	325	/* Send the value forward. */
	326	packet.type = SR_DF_ANALOG;
	327	packet.payload = &analog;
	328	analog.num_samples = 1;
	329	l = g_slist_copy(sdi->channels);
	330	if (devc->acquisition_target == KAXXXXP_CURRENT) {
	331	l = g_slist_remove_link(l, g_slist_nth(l, 0));
	332	analog.meaning->channels = l;
	333	analog.meaning->mq = SR_MQ_CURRENT;
	334	analog.meaning->unit = SR_UNIT_AMPERE;
	335	analog.meaning->mqflags = 0;
	336	analog.encoding->digits = 3;
	337	analog.spec->spec_digits = 3;
	338	analog.data = &devc->current;
	339	sr_session_send(sdi, &packet);
	340	} else if (devc->acquisition_target == KAXXXXP_VOLTAGE) {
	341	l = g_slist_remove_link(l, g_slist_nth(l, 1));
	342	analog.meaning->channels = l;
	343	analog.meaning->mq = SR_MQ_VOLTAGE;
	344	analog.meaning->unit = SR_UNIT_VOLT;
	345	analog.meaning->mqflags = SR_MQFLAG_DC;
	346	analog.encoding->digits = 2;
	347	analog.spec->spec_digits = 2;
	348	analog.data = &devc->voltage;
	349	sr_session_send(sdi, &packet);
	350	sr_sw_limits_update_samples_read(&devc->limits, 1);
d7083042	351	}
a7e48f3c	352	next_measurement(devc);
d7083042	353
3f9b48ae	354	if (sr_sw_limits_check(&devc->limits))
d2f7c417	355	sr_dev_acquisition_stop(sdi);
e75ee7de HV	356
	357	return TRUE;
	358	}