[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) 2018-2019 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_LIMIT:
		cmd = "ISET1:%05.3f";
		value = devc->set_current_limit;
		break;
	case KAXXXXP_VOLTAGE_TARGET:
		cmd = "VSET1:%05.2f";
		value = devc->set_voltage_target;
		break;
	case KAXXXXP_OUTPUT:
		cmd = "OUT%01.0f";
		value = (devc->set_output_enabled) ? 1 : 0;
		/* Set value back to recognize changes */
		devc->output_enabled = devc->set_output_enabled;
		break;
	case KAXXXXP_BEEP:
		cmd = "BEEP%01.0f";
		value = (devc->set_beep_enabled) ? 1 : 0;
		break;
	case KAXXXXP_OCP:
		cmd = "OCP%01.0f";
		value = (devc->set_ocp_enabled) ? 1 : 0;
		/* Set value back to recognize changes */
		devc->ocp_enabled = devc->set_ocp_enabled;
		break;
	case KAXXXXP_OVP:
		cmd = "OVP%01.0f";
		value = (devc->set_ovp_enabled) ? 1 : 0;
		/* Set value back to recognize changes */
		devc->ovp_enabled = devc->set_ovp_enabled;
		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;
	gboolean prev_status;

	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_LIMIT:
		/* Read set current from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "ISET1?");
		value = &(devc->current_limit);
		break;
	case KAXXXXP_VOLTAGE:
		/* Read voltage from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "VOUT1?");
		value = &(devc->voltage);
		break;
	case KAXXXXP_VOLTAGE_TARGET:
		/* Read set voltage from device. */
		ret = korad_kaxxxxp_send_cmd(serial, "VSET1?");
		value = &(devc->voltage_target);
		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 channel one. */
		prev_status = devc->cc_mode[0];
		devc->cc_mode[0] = !(status_byte & (1 << 0));
		devc->cc_mode_1_changed = devc->cc_mode[0] != prev_status;
		/* Constant current channel two. */
		prev_status = devc->cc_mode[1];
		devc->cc_mode[1] = !(status_byte & (1 << 1));
		devc->cc_mode_2_changed = devc->cc_mode[1] != prev_status;

		/*
		 * Tracking:
		 * status_byte & ((1 << 2) | (1 << 3))
		 * 00 independent 01 series 11 parallel
		 */
		devc->beep_enabled = status_byte & (1 << 4);

		/* OCP enabled. */
		prev_status = devc->ocp_enabled;
		devc->ocp_enabled = status_byte & (1 << 5);
		devc->ocp_enabled_changed = devc->ocp_enabled != prev_status;

		/* Output status. */
		prev_status = devc->output_enabled;
		devc->output_enabled = status_byte & (1 << 6);
		devc->output_enabled_changed = devc->output_enabled != prev_status;

		/* OVP enabled, special handling for Velleman LABPS3005 quirk. */
		if ((devc->model->model_id == VELLEMAN_LABPS3005D && devc->output_enabled) ||
			devc->model->model_id != VELLEMAN_LABPS3005D) {

			prev_status = devc->ovp_enabled;
			devc->ovp_enabled = status_byte & (1 << 7);
			devc->ovp_enabled_changed = devc->ovp_enabled != prev_status;
		}

		sr_dbg("Status: 0x%02x", status_byte);
		sr_spew("Status: CH1: constant %s CH2: constant %s. "
			"Tracking would be %s and %s. Output is %s. "
			"OCP is %s, OVP is %s. Device 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 << 6)) ? "enabled" : "disabled",
			(status_byte & (1 << 5)) ? "enabled" : "disabled",
			(status_byte & (1 << 7)) ? "enabled" : "disabled",
			(status_byte & (1 << 4)) ? "beeping" : "silent");
	}

	/* Read the sixth byte from ISET? BUG workaround. */
	if (target == KAXXXXP_CURRENT_LIMIT)
		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 = SR_MQFLAG_DC;
		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);
	} else if (devc->acquisition_target == KAXXXXP_STATUS) {
		if (devc->cc_mode_1_changed) {
			sr_session_send_meta(sdi, SR_CONF_REGULATION,
				g_variant_new_string((devc->cc_mode[0]) ? "CC" : "CV"));
			devc->cc_mode_1_changed = FALSE;
		}
		if (devc->cc_mode_2_changed) {
			sr_session_send_meta(sdi, SR_CONF_REGULATION,
				g_variant_new_string((devc->cc_mode[1]) ? "CC" : "CV"));
			devc->cc_mode_2_changed = FALSE;
		}
		if (devc->output_enabled_changed) {
			sr_session_send_meta(sdi, SR_CONF_ENABLED,
				g_variant_new_boolean(devc->output_enabled));
			devc->output_enabled_changed = FALSE;
		}
		if (devc->ocp_enabled_changed) {
			sr_session_send_meta(sdi, SR_CONF_OVER_CURRENT_PROTECTION_ENABLED,
				g_variant_new_boolean(devc->ocp_enabled));
			devc->ocp_enabled_changed = FALSE;
		}
		if (devc->ovp_enabled_changed) {
			sr_session_send_meta(sdi, SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED,
				g_variant_new_boolean(devc->ovp_enabled));
			devc->ovp_enabled_changed = FALSE;
		}
	}
	next_measurement(devc);

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

	return TRUE;
}
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2015 Hannu Vuolasaho <vuokkosetae@gmail.com>
	5	* Copyright (C) 2018-2019 Frank Stettner <frank-stettner@gmx.net>
	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
	24	#define REQ_TIMEOUT_MS 500
	25	#define DEVICE_PROCESSING_TIME_MS 80
	26
	27	SR_PRIV int korad_kaxxxxp_send_cmd(struct sr_serial_dev_inst *serial,
	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
	41	SR_PRIV int korad_kaxxxxp_read_chars(struct sr_serial_dev_inst *serial,
	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);
	77	sr_spew("Sleeping for processing %" PRIi64 " usec", sleeping_time);
	78	}
	79	}
	80
	81	SR_PRIV int korad_kaxxxxp_set_value(struct sr_serial_dev_inst *serial,
	82	int target, struct dev_context *devc)
	83	{
	84	char *msg;
	85	const char *cmd;
	86	float value;
	87	int ret;
	88
	89	g_mutex_lock(&devc->rw_mutex);
	90	give_device_time_to_process(devc);
	91
	92	switch (target) {
	93	case KAXXXXP_CURRENT:
	94	case KAXXXXP_VOLTAGE:
	95	case KAXXXXP_STATUS:
	96	sr_err("Can't set measurable parameter %d.", target);
	97	g_mutex_unlock(&devc->rw_mutex);
	98	return SR_ERR;
	99	case KAXXXXP_CURRENT_LIMIT:
	100	cmd = "ISET1:%05.3f";
	101	value = devc->set_current_limit;
	102	break;
	103	case KAXXXXP_VOLTAGE_TARGET:
	104	cmd = "VSET1:%05.2f";
	105	value = devc->set_voltage_target;
	106	break;
	107	case KAXXXXP_OUTPUT:
	108	cmd = "OUT%01.0f";
	109	value = (devc->set_output_enabled) ? 1 : 0;
	110	/* Set value back to recognize changes */
	111	devc->output_enabled = devc->set_output_enabled;
	112	break;
	113	case KAXXXXP_BEEP:
	114	cmd = "BEEP%01.0f";
	115	value = (devc->set_beep_enabled) ? 1 : 0;
	116	break;
	117	case KAXXXXP_OCP:
	118	cmd = "OCP%01.0f";
	119	value = (devc->set_ocp_enabled) ? 1 : 0;
	120	/* Set value back to recognize changes */
	121	devc->ocp_enabled = devc->set_ocp_enabled;
	122	break;
	123	case KAXXXXP_OVP:
	124	cmd = "OVP%01.0f";
	125	value = (devc->set_ovp_enabled) ? 1 : 0;
	126	/* Set value back to recognize changes */
	127	devc->ovp_enabled = devc->set_ovp_enabled;
	128	break;
	129	case KAXXXXP_SAVE:
	130	cmd = "SAV%01.0f";
	131	if (devc->program < 1 \|\| devc->program > 5) {
	132	sr_err("Only programs 1-5 supported and %d isn't "
	133	"between them.", devc->program);
	134	g_mutex_unlock(&devc->rw_mutex);
	135	return SR_ERR;
	136	}
	137	value = devc->program;
	138	break;
	139	case KAXXXXP_RECALL:
	140	cmd = "RCL%01.0f";
	141	if (devc->program < 1 \|\| devc->program > 5) {
	142	sr_err("Only programs 1-5 supported and %d isn't "
	143	"between them.", devc->program);
	144	g_mutex_unlock(&devc->rw_mutex);
	145	return SR_ERR;
	146	}
	147	value = devc->program;
	148	break;
	149	default:
	150	sr_err("Don't know how to set %d.", target);
	151	g_mutex_unlock(&devc->rw_mutex);
	152	return SR_ERR;
	153	}
	154
	155	msg = g_malloc0(20 + 1);
	156	if (cmd)
	157	sr_snprintf_ascii(msg, 20, cmd, value);
	158
	159	ret = korad_kaxxxxp_send_cmd(serial, msg);
	160	devc->req_sent_at = g_get_monotonic_time();
	161	g_free(msg);
	162
	163	g_mutex_unlock(&devc->rw_mutex);
	164
	165	return ret;
	166	}
	167
	168	SR_PRIV int korad_kaxxxxp_get_value(struct sr_serial_dev_inst *serial,
	169	int target, struct dev_context *devc)
	170	{
	171	int ret, count;
	172	char reply[6];
	173	float *value;
	174	char status_byte;
	175	gboolean prev_status;
	176
	177	g_mutex_lock(&devc->rw_mutex);
	178	give_device_time_to_process(devc);
	179
	180	value = NULL;
	181	count = 5;
	182
	183	switch (target) {
	184	case KAXXXXP_CURRENT:
	185	/* Read current from device. */
	186	ret = korad_kaxxxxp_send_cmd(serial, "IOUT1?");
	187	value = &(devc->current);
	188	break;
	189	case KAXXXXP_CURRENT_LIMIT:
	190	/* Read set current from device. */
	191	ret = korad_kaxxxxp_send_cmd(serial, "ISET1?");
	192	value = &(devc->current_limit);
	193	break;
	194	case KAXXXXP_VOLTAGE:
	195	/* Read voltage from device. */
	196	ret = korad_kaxxxxp_send_cmd(serial, "VOUT1?");
	197	value = &(devc->voltage);
	198	break;
	199	case KAXXXXP_VOLTAGE_TARGET:
	200	/* Read set voltage from device. */
	201	ret = korad_kaxxxxp_send_cmd(serial, "VSET1?");
	202	value = &(devc->voltage_target);
	203	break;
	204	case KAXXXXP_STATUS:
	205	case KAXXXXP_OUTPUT:
	206	case KAXXXXP_OCP:
	207	case KAXXXXP_OVP:
	208	/* Read status from device. */
	209	ret = korad_kaxxxxp_send_cmd(serial, "STATUS?");
	210	count = 1;
	211	break;
	212	default:
	213	sr_err("Don't know how to query %d.", target);
	214	g_mutex_unlock(&devc->rw_mutex);
	215	return SR_ERR;
	216	}
	217
	218	devc->req_sent_at = g_get_monotonic_time();
	219
	220	if ((ret = korad_kaxxxxp_read_chars(serial, count, reply)) < 0) {
	221	g_mutex_unlock(&devc->rw_mutex);
	222	return ret;
	223	}
	224
	225	reply[count] = 0;
	226
	227	if (value) {
	228	sr_atof_ascii((const char *)&reply, value);
	229	sr_dbg("value: %f", *value);
	230	} else {
	231	/* We have status reply. */
	232	status_byte = reply[0];
	233
	234	/* Constant current channel one. */
	235	prev_status = devc->cc_mode[0];
	236	devc->cc_mode[0] = !(status_byte & (1 << 0));
	237	devc->cc_mode_1_changed = devc->cc_mode[0] != prev_status;
	238	/* Constant current channel two. */
	239	prev_status = devc->cc_mode[1];
	240	devc->cc_mode[1] = !(status_byte & (1 << 1));
	241	devc->cc_mode_2_changed = devc->cc_mode[1] != prev_status;
	242
	243	/*
	244	* Tracking:
	245	* status_byte & ((1 << 2) \| (1 << 3))
	246	* 00 independent 01 series 11 parallel
	247	*/
	248	devc->beep_enabled = status_byte & (1 << 4);
	249
	250	/* OCP enabled. */
	251	prev_status = devc->ocp_enabled;
	252	devc->ocp_enabled = status_byte & (1 << 5);
	253	devc->ocp_enabled_changed = devc->ocp_enabled != prev_status;
	254
	255	/* Output status. */
	256	prev_status = devc->output_enabled;
	257	devc->output_enabled = status_byte & (1 << 6);
	258	devc->output_enabled_changed = devc->output_enabled != prev_status;
	259
	260	/* OVP enabled, special handling for Velleman LABPS3005 quirk. */
	261	if ((devc->model->model_id == VELLEMAN_LABPS3005D && devc->output_enabled) \|\|
	262	devc->model->model_id != VELLEMAN_LABPS3005D) {
	263
	264	prev_status = devc->ovp_enabled;
	265	devc->ovp_enabled = status_byte & (1 << 7);
	266	devc->ovp_enabled_changed = devc->ovp_enabled != prev_status;
	267	}
	268
	269	sr_dbg("Status: 0x%02x", status_byte);
	270	sr_spew("Status: CH1: constant %s CH2: constant %s. "
	271	"Tracking would be %s and %s. Output is %s. "
	272	"OCP is %s, OVP is %s. Device is %s.",
	273	(status_byte & (1 << 0)) ? "voltage" : "current",
	274	(status_byte & (1 << 1)) ? "voltage" : "current",
	275	(status_byte & (1 << 2)) ? "parallel" : "series",
	276	(status_byte & (1 << 3)) ? "tracking" : "independent",
	277	(status_byte & (1 << 6)) ? "enabled" : "disabled",
	278	(status_byte & (1 << 5)) ? "enabled" : "disabled",
	279	(status_byte & (1 << 7)) ? "enabled" : "disabled",
	280	(status_byte & (1 << 4)) ? "beeping" : "silent");
	281	}
	282
	283	/* Read the sixth byte from ISET? BUG workaround. */
	284	if (target == KAXXXXP_CURRENT_LIMIT)
	285	serial_read_blocking(serial, &status_byte, 1, 10);
	286
	287	g_mutex_unlock(&devc->rw_mutex);
	288
	289	return ret;
	290	}
	291
	292	SR_PRIV int korad_kaxxxxp_get_all_values(struct sr_serial_dev_inst *serial,
	293	struct dev_context *devc)
	294	{
	295	int ret, target;
	296
	297	for (target = KAXXXXP_CURRENT;
	298	target <= KAXXXXP_STATUS; target++) {
	299	if ((ret = korad_kaxxxxp_get_value(serial, target, devc)) < 0)
	300	return ret;
	301	}
	302
	303	return ret;
	304	}
	305
	306	static void next_measurement(struct dev_context *devc)
	307	{
	308	switch (devc->acquisition_target) {
	309	case KAXXXXP_CURRENT:
	310	devc->acquisition_target = KAXXXXP_VOLTAGE;
	311	break;
	312	case KAXXXXP_VOLTAGE:
	313	devc->acquisition_target = KAXXXXP_STATUS;
	314	break;
	315	case KAXXXXP_STATUS:
	316	devc->acquisition_target = KAXXXXP_CURRENT;
	317	break;
	318	default:
	319	devc->acquisition_target = KAXXXXP_CURRENT;
	320	sr_err("Invalid target for next acquisition.");
	321	}
	322	}
	323
	324	SR_PRIV int korad_kaxxxxp_receive_data(int fd, int revents, void *cb_data)
	325	{
	326	struct sr_dev_inst *sdi;
	327	struct dev_context *devc;
	328	struct sr_serial_dev_inst *serial;
	329	struct sr_datafeed_packet packet;
	330	struct sr_datafeed_analog analog;
	331	struct sr_analog_encoding encoding;
	332	struct sr_analog_meaning meaning;
	333	struct sr_analog_spec spec;
	334	GSList *l;
	335
	336	(void)fd;
	337	(void)revents;
	338
	339	if (!(sdi = cb_data))
	340	return TRUE;
	341
	342	if (!(devc = sdi->priv))
	343	return TRUE;
	344
	345	serial = sdi->conn;
	346
	347	/* Get the value. */
	348	korad_kaxxxxp_get_value(serial, devc->acquisition_target, devc);
	349
	350	/* Note: digits/spec_digits will be overridden later. */
	351	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
	352
	353	/* Send the value forward. */
	354	packet.type = SR_DF_ANALOG;
	355	packet.payload = &analog;
	356	analog.num_samples = 1;
	357	l = g_slist_copy(sdi->channels);
	358	if (devc->acquisition_target == KAXXXXP_CURRENT) {
	359	l = g_slist_remove_link(l, g_slist_nth(l, 0));
	360	analog.meaning->channels = l;
	361	analog.meaning->mq = SR_MQ_CURRENT;
	362	analog.meaning->unit = SR_UNIT_AMPERE;
	363	analog.meaning->mqflags = SR_MQFLAG_DC;
	364	analog.encoding->digits = 3;
	365	analog.spec->spec_digits = 3;
	366	analog.data = &devc->current;
	367	sr_session_send(sdi, &packet);
	368	} else if (devc->acquisition_target == KAXXXXP_VOLTAGE) {
	369	l = g_slist_remove_link(l, g_slist_nth(l, 1));
	370	analog.meaning->channels = l;
	371	analog.meaning->mq = SR_MQ_VOLTAGE;
	372	analog.meaning->unit = SR_UNIT_VOLT;
	373	analog.meaning->mqflags = SR_MQFLAG_DC;
	374	analog.encoding->digits = 2;
	375	analog.spec->spec_digits = 2;
	376	analog.data = &devc->voltage;
	377	sr_session_send(sdi, &packet);
	378	sr_sw_limits_update_samples_read(&devc->limits, 1);
	379	} else if (devc->acquisition_target == KAXXXXP_STATUS) {
	380	if (devc->cc_mode_1_changed) {
	381	sr_session_send_meta(sdi, SR_CONF_REGULATION,
	382	g_variant_new_string((devc->cc_mode[0]) ? "CC" : "CV"));
	383	devc->cc_mode_1_changed = FALSE;
	384	}
	385	if (devc->cc_mode_2_changed) {
	386	sr_session_send_meta(sdi, SR_CONF_REGULATION,
	387	g_variant_new_string((devc->cc_mode[1]) ? "CC" : "CV"));
	388	devc->cc_mode_2_changed = FALSE;
	389	}
	390	if (devc->output_enabled_changed) {
	391	sr_session_send_meta(sdi, SR_CONF_ENABLED,
	392	g_variant_new_boolean(devc->output_enabled));
	393	devc->output_enabled_changed = FALSE;
	394	}
	395	if (devc->ocp_enabled_changed) {
	396	sr_session_send_meta(sdi, SR_CONF_OVER_CURRENT_PROTECTION_ENABLED,
	397	g_variant_new_boolean(devc->ocp_enabled));
	398	devc->ocp_enabled_changed = FALSE;
	399	}
	400	if (devc->ovp_enabled_changed) {
	401	sr_session_send_meta(sdi, SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED,
	402	g_variant_new_boolean(devc->ovp_enabled));
	403	devc->ovp_enabled_changed = FALSE;
	404	}
	405	}
	406	next_measurement(devc);
	407
	408	if (sr_sw_limits_check(&devc->limits))
	409	sr_dev_acquisition_stop(sdi);
	410
	411	return TRUE;
	412	}