[libsigrok.git] / src / hardware / arachnid-labs-re-load-pro / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2015-2016 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 2 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 <math.h>
#include <string.h>
#include "protocol.h"

#define READ_TIMEOUT_MS 500

static int send_cmd(const struct sr_dev_inst *sdi, const char *cmd,
		char *replybuf, int replybufsize)
{
	char *bufptr;
	int len, ret;
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;

	devc = sdi->priv;
	serial = sdi->conn;

	/* Send the command (blocking, with timeout). */
	if ((ret = serial_write_blocking(serial, cmd,
			strlen(cmd), serial_timeout(serial,
			strlen(cmd)))) < (int)strlen(cmd)) {
		sr_err("Unable to send command.");
		return SR_ERR;
	}

	if (!devc->acquisition_running) {
		/* Read the reply (blocking, with timeout). */
		memset(replybuf, 0, replybufsize);
		bufptr = replybuf;
		len = replybufsize;
		ret = serial_readline(serial, &bufptr, &len, READ_TIMEOUT_MS);

		/* If we got 0 characters (possibly one \r or \n), retry once. */
		if (len == 0) {
			len = replybufsize;
			ret = serial_readline(serial, &bufptr, &len, READ_TIMEOUT_MS);
		}

		if (g_str_has_prefix((const char *)&bufptr, "err ")) {
			sr_err("Device replied with an error: '%s'.", bufptr);
			return SR_ERR;
		}
	}

	return ret;
}

SR_PRIV int reloadpro_set_current_limit(const struct sr_dev_inst *sdi,
					float current_limit)
{
	struct dev_context *devc;
	int ret, ma;
	char buf[100];
	char *cmd;

	devc = sdi->priv;

	if (current_limit < 0 || current_limit > 6) {
		sr_err("The current limit must be 0-6 A (was %f A).", current_limit);
		return SR_ERR_ARG;
	}

	/* Hardware expects current limit in mA, integer (0..6000). */
	ma = (int)round(current_limit * 1000);

	cmd = g_strdup_printf("set %d\n", ma);
	g_mutex_lock(&devc->acquisition_mutex);
	ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf));
	g_mutex_unlock(&devc->acquisition_mutex);
	g_free(cmd);

	if (ret < 0) {
		sr_err("Error sending current limit command: %d.", ret);
		return SR_ERR;
	}
	return SR_OK;
}

SR_PRIV int reloadpro_set_on_off(const struct sr_dev_inst *sdi, gboolean on)
{
	struct dev_context *devc;
	int ret;
	char buf[100];
	const char *cmd;

	devc = sdi->priv;

	cmd = (on) ? "on\n" : "off\n";
	g_mutex_lock(&devc->acquisition_mutex);
	ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf));
	g_mutex_unlock(&devc->acquisition_mutex);

	if (ret < 0) {
		sr_err("Error sending on/off command: %d.", ret);
		return SR_ERR;
	}
	return SR_OK;
}

SR_PRIV int reloadpro_set_under_voltage_threshold(const struct sr_dev_inst *sdi,
					float voltage)
{
	struct dev_context *devc;
	int ret, mv;
	char buf[100];
	char *cmd;

	devc = sdi->priv;

	if (voltage < 0 || voltage > 60) {
		sr_err("The under voltage threshold must be 0-60 V (was %f V).",
			voltage);
		return SR_ERR_ARG;
	}

	/* Hardware expects voltage in mV, integer (0..60000). */
	mv = (int)round(voltage * 1000);

	sr_spew("Setting under voltage threshold to %f V (%d mV).", voltage, mv);

	cmd = g_strdup_printf("uvlo %d\n", mv);
	g_mutex_lock(&devc->acquisition_mutex);
	ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf));
	g_mutex_unlock(&devc->acquisition_mutex);
	g_free(cmd);

	if (ret < 0) {
		sr_err("Error sending under voltage threshold command: %d.", ret);
		return SR_ERR;
	}
	return SR_OK;
}

SR_PRIV int reloadpro_get_current_limit(const struct sr_dev_inst *sdi,
					float *current_limit)
{
	struct dev_context *devc;
	int ret;
	char buf[100];
	gint64 end_time;

	devc = sdi->priv;

	g_mutex_lock(&devc->acquisition_mutex);
	if ((ret = send_cmd(sdi, "set\n", (char *)&buf, sizeof(buf))) < 0) {
		sr_err("Error sending current limit query: %d.", ret);
		return SR_ERR;
	}

	if (devc->acquisition_running) {
		end_time = g_get_monotonic_time () + 5 * G_TIME_SPAN_SECOND;
		if (!g_cond_wait_until(&devc->current_limit_cond,
				&devc->acquisition_mutex, end_time)) {
			/* Timeout has passed. */
			g_mutex_unlock(&devc->acquisition_mutex);
			return SR_ERR;
		}
	} else {
		/* Hardware sends current limit in mA, integer (0..6000). */
		devc->current_limit = g_ascii_strtod(buf + 4, NULL) / 1000;
	}
	g_mutex_unlock(&devc->acquisition_mutex);

	if (current_limit)
		*current_limit = devc->current_limit;

	return SR_OK;
}

SR_PRIV int reloadpro_get_under_voltage_threshold(const struct sr_dev_inst *sdi,
					float *uvc_threshold)
{
	struct dev_context *devc;
	int ret;
	char buf[100];
	gint64 end_time;

	devc = sdi->priv;

	g_mutex_lock(&devc->acquisition_mutex);
	if ((ret = send_cmd(sdi, "uvlo\n", (char *)&buf, sizeof(buf))) < 0) {
		sr_err("Error sending under voltage threshold query: %d.", ret);
		return SR_ERR;
	}

	if (devc->acquisition_running) {
		end_time = g_get_monotonic_time () + 5 * G_TIME_SPAN_SECOND;
		if (!g_cond_wait_until(&devc->uvc_threshold_cond,
				&devc->acquisition_mutex, end_time)) {
			/* Timeout has passed. */
			g_mutex_unlock(&devc->acquisition_mutex);
			return SR_ERR;
		}
	} else {
		/* Hardware sends voltage in mV, integer (0..60000). */
		devc->uvc_threshold = g_ascii_strtod(buf + 5, NULL) / 1000;
	}
	g_mutex_unlock(&devc->acquisition_mutex);

	if (uvc_threshold)
		*uvc_threshold = devc->uvc_threshold;

	return SR_OK;
}

SR_PRIV int reloadpro_get_voltage_current(const struct sr_dev_inst *sdi,
		float *voltage, float *current)
{
	struct dev_context *devc;
	int ret;
	char buf[100];
	char **tokens;
	gint64 end_time;

	devc = sdi->priv;

	g_mutex_lock(&devc->acquisition_mutex);
	if ((ret = send_cmd(sdi, "read\n", (char *)&buf, sizeof(buf))) < 0) {
		sr_err("Error sending voltage/current query: %d.", ret);
		return SR_ERR;
	}

	if (devc->acquisition_running) {
		end_time = g_get_monotonic_time () + 5 * G_TIME_SPAN_SECOND;
		if (!g_cond_wait_until(&devc->voltage_cond,
				&devc->acquisition_mutex, end_time)) {
			/* Timeout has passed. */
			g_mutex_unlock(&devc->acquisition_mutex);
			return SR_ERR;
		}
	} else {
		/* Reply: "read <current> <voltage>". */
		tokens = g_strsplit((const char *)&buf, " ", 3);
		devc->voltage = g_ascii_strtod(tokens[2], NULL) / 1000;
		devc->current = g_ascii_strtod(tokens[1], NULL) / 1000;
		g_strfreev(tokens);
	}
	g_mutex_unlock(&devc->acquisition_mutex);

	if (voltage)
		*voltage = devc->voltage;
	if (current)
		*current = devc->current;

	return SR_OK;
}

static void handle_packet(const struct sr_dev_inst *sdi)
{
	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;
	struct dev_context *devc;
	char **tokens;
	GSList *l;

	devc = sdi->priv;

	if (g_str_has_prefix((const char *)devc->buf, "overtemp")) {
		sr_warn("Overtemperature condition!");
		devc->otp_active = TRUE;
		sr_session_send_meta(sdi, SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE,
			g_variant_new_boolean(TRUE));
		return;
	}

	if (g_str_has_prefix((const char *)devc->buf, "undervolt")) {
		sr_warn("Undervoltage condition!");
		devc->uvc_active = TRUE;
		sr_session_send_meta(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION_ACTIVE,
			g_variant_new_boolean(TRUE));
		return;
	}

	if (g_str_has_prefix((const char *)devc->buf, "err ")) {
		sr_err("Device replied with an error: '%s'.", devc->buf);
		return;
	}

	if (g_str_has_prefix((const char *)devc->buf, "set ")) {
		tokens = g_strsplit((const char *)devc->buf, " ", 2);
		devc->current_limit = g_ascii_strtod(tokens[1], NULL) / 1000;
		g_strfreev(tokens);
		g_cond_signal(&devc->current_limit_cond);
		sr_session_send_meta(sdi, SR_CONF_CURRENT_LIMIT,
			g_variant_new_double(devc->current_limit));
		return;
	}

	if (g_str_has_prefix((const char *)devc->buf, "uvlo ")) {
		tokens = g_strsplit((const char *)devc->buf, " ", 2);
		devc->uvc_threshold = g_ascii_strtod(tokens[1], NULL) / 1000;
		g_strfreev(tokens);
		g_cond_signal(&devc->uvc_threshold_cond);
		if (devc->uvc_threshold == .0) {
			sr_session_send_meta(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION,
				g_variant_new_boolean(FALSE));
		} else {
			sr_session_send_meta(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION,
				g_variant_new_boolean(TRUE));
			sr_session_send_meta(sdi,
				SR_CONF_UNDER_VOLTAGE_CONDITION_THRESHOLD,
				g_variant_new_double(devc->uvc_threshold));
		}
		return;
	}

	if (!g_str_has_prefix((const char *)devc->buf, "read ")) {
		sr_dbg("Unknown packet: '%s'.", devc->buf);
		return;
	}

	tokens = g_strsplit((const char *)devc->buf, " ", 3);
	devc->voltage = g_ascii_strtod(tokens[2], NULL) / 1000;
	devc->current = g_ascii_strtod(tokens[1], NULL) / 1000;
	g_strfreev(tokens);
	g_cond_signal(&devc->voltage_cond);

	/* Begin frame. */
	std_session_send_df_frame_begin(sdi);

	sr_analog_init(&analog, &encoding, &meaning, &spec, 4);

	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	analog.num_samples = 1;

	/* Voltage */
	l = g_slist_copy(sdi->channels);
	l = g_slist_remove_link(l, g_slist_nth(l, 1));
	meaning.channels = l;
	meaning.mq = SR_MQ_VOLTAGE;
	meaning.mqflags = SR_MQFLAG_DC;
	meaning.unit = SR_UNIT_VOLT;
	encoding.digits = 3;
	analog.data = &devc->voltage;
	sr_session_send(sdi, &packet);
	g_slist_free(l);

	/* Current */
	l = g_slist_copy(sdi->channels);
	l = g_slist_remove_link(l, g_slist_nth(l, 0));
	meaning.channels = l;
	meaning.mq = SR_MQ_CURRENT;
	meaning.mqflags = SR_MQFLAG_DC;
	meaning.unit = SR_UNIT_AMPERE;
	encoding.digits = 3;
	analog.data = &devc->current;
	sr_session_send(sdi, &packet);
	g_slist_free(l);

	/* End frame. */
	std_session_send_df_frame_end(sdi);

	sr_sw_limits_update_samples_read(&devc->limits, 1);
}

static void handle_new_data(const struct sr_dev_inst *sdi)
{
	int len;
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	char *buf;

	devc = sdi->priv;
	serial = sdi->conn;

	len = RELOADPRO_BUFSIZE - devc->buflen;
	buf = devc->buf;
	g_mutex_lock(&devc->acquisition_mutex);
	if (serial_readline(serial, &buf, &len, 250) != SR_OK) {
		g_mutex_unlock(&devc->acquisition_mutex);
		return;
	}

	if (len == 0) {
		g_mutex_unlock(&devc->acquisition_mutex);
		return; /* No new bytes, nothing to do. */
	}
	if (len < 0) {
		sr_err("Serial port read error: %d.", len);
		g_mutex_unlock(&devc->acquisition_mutex);
		return;
	}
	devc->buflen += len;

	handle_packet(sdi);
	g_mutex_unlock(&devc->acquisition_mutex);
	memset(devc->buf, 0, RELOADPRO_BUFSIZE);
	devc->buflen = 0;
}

SR_PRIV int reloadpro_receive_data(int fd, int revents, void *cb_data)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;

	(void)fd;

	sdi = cb_data;
	devc = sdi->priv;

	if (revents != G_IO_IN)
		return TRUE;

	handle_new_data(sdi);

	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) 2015-2016 Uwe Hermann <uwe@hermann-uwe.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <config.h>
	21	#include <math.h>
	22	#include <string.h>
	23	#include "protocol.h"
	24
	25	#define READ_TIMEOUT_MS 500
	26
	27	static int send_cmd(const struct sr_dev_inst sdi, const char cmd,
	28	char *replybuf, int replybufsize)
	29	{
	30	char *bufptr;
	31	int len, ret;
	32	struct dev_context *devc;
	33	struct sr_serial_dev_inst *serial;
	34
	35	devc = sdi->priv;
	36	serial = sdi->conn;
	37
	38	/* Send the command (blocking, with timeout). */
	39	if ((ret = serial_write_blocking(serial, cmd,
	40	strlen(cmd), serial_timeout(serial,
	41	strlen(cmd)))) < (int)strlen(cmd)) {
	42	sr_err("Unable to send command.");
	43	return SR_ERR;
	44	}
	45
	46	if (!devc->acquisition_running) {
	47	/* Read the reply (blocking, with timeout). */
	48	memset(replybuf, 0, replybufsize);
	49	bufptr = replybuf;
	50	len = replybufsize;
	51	ret = serial_readline(serial, &bufptr, &len, READ_TIMEOUT_MS);
	52
	53	/* If we got 0 characters (possibly one \r or \n), retry once. */
	54	if (len == 0) {
	55	len = replybufsize;
	56	ret = serial_readline(serial, &bufptr, &len, READ_TIMEOUT_MS);
	57	}
	58
	59	if (g_str_has_prefix((const char *)&bufptr, "err ")) {
	60	sr_err("Device replied with an error: '%s'.", bufptr);
	61	return SR_ERR;
	62	}
	63	}
	64
	65	return ret;
	66	}
	67
	68	SR_PRIV int reloadpro_set_current_limit(const struct sr_dev_inst *sdi,
	69	float current_limit)
	70	{
	71	struct dev_context *devc;
	72	int ret, ma;
	73	char buf[100];
	74	char *cmd;
	75
	76	devc = sdi->priv;
	77
	78	if (current_limit < 0 \|\| current_limit > 6) {
	79	sr_err("The current limit must be 0-6 A (was %f A).", current_limit);
	80	return SR_ERR_ARG;
	81	}
	82
	83	/* Hardware expects current limit in mA, integer (0..6000). */
	84	ma = (int)round(current_limit * 1000);
	85
	86	cmd = g_strdup_printf("set %d\n", ma);
	87	g_mutex_lock(&devc->acquisition_mutex);
	88	ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf));
	89	g_mutex_unlock(&devc->acquisition_mutex);
	90	g_free(cmd);
	91
	92	if (ret < 0) {
	93	sr_err("Error sending current limit command: %d.", ret);
	94	return SR_ERR;
	95	}
	96	return SR_OK;
	97	}
	98
	99	SR_PRIV int reloadpro_set_on_off(const struct sr_dev_inst *sdi, gboolean on)
	100	{
	101	struct dev_context *devc;
	102	int ret;
	103	char buf[100];
	104	const char *cmd;
	105
	106	devc = sdi->priv;
	107
	108	cmd = (on) ? "on\n" : "off\n";
	109	g_mutex_lock(&devc->acquisition_mutex);
	110	ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf));
	111	g_mutex_unlock(&devc->acquisition_mutex);
	112
	113	if (ret < 0) {
	114	sr_err("Error sending on/off command: %d.", ret);
	115	return SR_ERR;
	116	}
	117	return SR_OK;
	118	}
	119
	120	SR_PRIV int reloadpro_set_under_voltage_threshold(const struct sr_dev_inst *sdi,
	121	float voltage)
	122	{
	123	struct dev_context *devc;
	124	int ret, mv;
	125	char buf[100];
	126	char *cmd;
	127
	128	devc = sdi->priv;
	129
	130	if (voltage < 0 \|\| voltage > 60) {
	131	sr_err("The under voltage threshold must be 0-60 V (was %f V).",
	132	voltage);
	133	return SR_ERR_ARG;
	134	}
	135
	136	/* Hardware expects voltage in mV, integer (0..60000). */
	137	mv = (int)round(voltage * 1000);
	138
	139	sr_spew("Setting under voltage threshold to %f V (%d mV).", voltage, mv);
	140
	141	cmd = g_strdup_printf("uvlo %d\n", mv);
	142	g_mutex_lock(&devc->acquisition_mutex);
	143	ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf));
	144	g_mutex_unlock(&devc->acquisition_mutex);
	145	g_free(cmd);
	146
	147	if (ret < 0) {
	148	sr_err("Error sending under voltage threshold command: %d.", ret);
	149	return SR_ERR;
	150	}
	151	return SR_OK;
	152	}
	153
	154	SR_PRIV int reloadpro_get_current_limit(const struct sr_dev_inst *sdi,
	155	float *current_limit)
	156	{
	157	struct dev_context *devc;
	158	int ret;
	159	char buf[100];
	160	gint64 end_time;
	161
	162	devc = sdi->priv;
	163
	164	g_mutex_lock(&devc->acquisition_mutex);
	165	if ((ret = send_cmd(sdi, "set\n", (char *)&buf, sizeof(buf))) < 0) {
	166	sr_err("Error sending current limit query: %d.", ret);
	167	return SR_ERR;
	168	}
	169
	170	if (devc->acquisition_running) {
	171	end_time = g_get_monotonic_time () + 5 * G_TIME_SPAN_SECOND;
	172	if (!g_cond_wait_until(&devc->current_limit_cond,
	173	&devc->acquisition_mutex, end_time)) {
	174	/* Timeout has passed. */
	175	g_mutex_unlock(&devc->acquisition_mutex);
	176	return SR_ERR;
	177	}
	178	} else {
	179	/* Hardware sends current limit in mA, integer (0..6000). */
	180	devc->current_limit = g_ascii_strtod(buf + 4, NULL) / 1000;
	181	}
	182	g_mutex_unlock(&devc->acquisition_mutex);
	183
	184	if (current_limit)
	185	*current_limit = devc->current_limit;
	186
	187	return SR_OK;
	188	}
	189
	190	SR_PRIV int reloadpro_get_under_voltage_threshold(const struct sr_dev_inst *sdi,
	191	float *uvc_threshold)
	192	{
	193	struct dev_context *devc;
	194	int ret;
	195	char buf[100];
	196	gint64 end_time;
	197
	198	devc = sdi->priv;
	199
	200	g_mutex_lock(&devc->acquisition_mutex);
	201	if ((ret = send_cmd(sdi, "uvlo\n", (char *)&buf, sizeof(buf))) < 0) {
	202	sr_err("Error sending under voltage threshold query: %d.", ret);
	203	return SR_ERR;
	204	}
	205
	206	if (devc->acquisition_running) {
	207	end_time = g_get_monotonic_time () + 5 * G_TIME_SPAN_SECOND;
	208	if (!g_cond_wait_until(&devc->uvc_threshold_cond,
	209	&devc->acquisition_mutex, end_time)) {
	210	/* Timeout has passed. */
	211	g_mutex_unlock(&devc->acquisition_mutex);
	212	return SR_ERR;
	213	}
	214	} else {
	215	/* Hardware sends voltage in mV, integer (0..60000). */
	216	devc->uvc_threshold = g_ascii_strtod(buf + 5, NULL) / 1000;
	217	}
	218	g_mutex_unlock(&devc->acquisition_mutex);
	219
	220	if (uvc_threshold)
	221	*uvc_threshold = devc->uvc_threshold;
	222
	223	return SR_OK;
	224	}
	225
	226	SR_PRIV int reloadpro_get_voltage_current(const struct sr_dev_inst *sdi,
	227	float voltage, float current)
	228	{
	229	struct dev_context *devc;
	230	int ret;
	231	char buf[100];
	232	char **tokens;
	233	gint64 end_time;
	234
	235	devc = sdi->priv;
	236
	237	g_mutex_lock(&devc->acquisition_mutex);
	238	if ((ret = send_cmd(sdi, "read\n", (char *)&buf, sizeof(buf))) < 0) {
	239	sr_err("Error sending voltage/current query: %d.", ret);
	240	return SR_ERR;
	241	}
	242
	243	if (devc->acquisition_running) {
	244	end_time = g_get_monotonic_time () + 5 * G_TIME_SPAN_SECOND;
	245	if (!g_cond_wait_until(&devc->voltage_cond,
	246	&devc->acquisition_mutex, end_time)) {
	247	/* Timeout has passed. */
	248	g_mutex_unlock(&devc->acquisition_mutex);
	249	return SR_ERR;
	250	}
	251	} else {
	252	/* Reply: "read <current> <voltage>". */
	253	tokens = g_strsplit((const char *)&buf, " ", 3);
	254	devc->voltage = g_ascii_strtod(tokens[2], NULL) / 1000;
	255	devc->current = g_ascii_strtod(tokens[1], NULL) / 1000;
	256	g_strfreev(tokens);
	257	}
	258	g_mutex_unlock(&devc->acquisition_mutex);
	259
	260	if (voltage)
	261	*voltage = devc->voltage;
	262	if (current)
	263	*current = devc->current;
	264
	265	return SR_OK;
	266	}
	267
	268	static void handle_packet(const struct sr_dev_inst *sdi)
	269	{
	270	struct sr_datafeed_packet packet;
	271	struct sr_datafeed_analog analog;
	272	struct sr_analog_encoding encoding;
	273	struct sr_analog_meaning meaning;
	274	struct sr_analog_spec spec;
	275	struct dev_context *devc;
	276	char **tokens;
	277	GSList *l;
	278
	279	devc = sdi->priv;
	280
	281	if (g_str_has_prefix((const char *)devc->buf, "overtemp")) {
	282	sr_warn("Overtemperature condition!");
	283	devc->otp_active = TRUE;
	284	sr_session_send_meta(sdi, SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE,
	285	g_variant_new_boolean(TRUE));
	286	return;
	287	}
	288
	289	if (g_str_has_prefix((const char *)devc->buf, "undervolt")) {
	290	sr_warn("Undervoltage condition!");
	291	devc->uvc_active = TRUE;
	292	sr_session_send_meta(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION_ACTIVE,
	293	g_variant_new_boolean(TRUE));
	294	return;
	295	}
	296
	297	if (g_str_has_prefix((const char *)devc->buf, "err ")) {
	298	sr_err("Device replied with an error: '%s'.", devc->buf);
	299	return;
	300	}
	301
	302	if (g_str_has_prefix((const char *)devc->buf, "set ")) {
	303	tokens = g_strsplit((const char *)devc->buf, " ", 2);
	304	devc->current_limit = g_ascii_strtod(tokens[1], NULL) / 1000;
	305	g_strfreev(tokens);
	306	g_cond_signal(&devc->current_limit_cond);
	307	sr_session_send_meta(sdi, SR_CONF_CURRENT_LIMIT,
	308	g_variant_new_double(devc->current_limit));
	309	return;
	310	}
	311
	312	if (g_str_has_prefix((const char *)devc->buf, "uvlo ")) {
	313	tokens = g_strsplit((const char *)devc->buf, " ", 2);
	314	devc->uvc_threshold = g_ascii_strtod(tokens[1], NULL) / 1000;
	315	g_strfreev(tokens);
	316	g_cond_signal(&devc->uvc_threshold_cond);
	317	if (devc->uvc_threshold == .0) {
	318	sr_session_send_meta(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION,
	319	g_variant_new_boolean(FALSE));
	320	} else {
	321	sr_session_send_meta(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION,
	322	g_variant_new_boolean(TRUE));
	323	sr_session_send_meta(sdi,
	324	SR_CONF_UNDER_VOLTAGE_CONDITION_THRESHOLD,
	325	g_variant_new_double(devc->uvc_threshold));
	326	}
	327	return;
	328	}
	329
	330	if (!g_str_has_prefix((const char *)devc->buf, "read ")) {
	331	sr_dbg("Unknown packet: '%s'.", devc->buf);
	332	return;
	333	}
	334
	335	tokens = g_strsplit((const char *)devc->buf, " ", 3);
	336	devc->voltage = g_ascii_strtod(tokens[2], NULL) / 1000;
	337	devc->current = g_ascii_strtod(tokens[1], NULL) / 1000;
	338	g_strfreev(tokens);
	339	g_cond_signal(&devc->voltage_cond);
	340
	341	/* Begin frame. */
	342	std_session_send_df_frame_begin(sdi);
	343
	344	sr_analog_init(&analog, &encoding, &meaning, &spec, 4);
	345
	346	packet.type = SR_DF_ANALOG;
	347	packet.payload = &analog;
	348	analog.num_samples = 1;
	349
	350	/* Voltage */
	351	l = g_slist_copy(sdi->channels);
	352	l = g_slist_remove_link(l, g_slist_nth(l, 1));
	353	meaning.channels = l;
	354	meaning.mq = SR_MQ_VOLTAGE;
	355	meaning.mqflags = SR_MQFLAG_DC;
	356	meaning.unit = SR_UNIT_VOLT;
	357	encoding.digits = 3;
	358	analog.data = &devc->voltage;
	359	sr_session_send(sdi, &packet);
	360	g_slist_free(l);
	361
	362	/* Current */
	363	l = g_slist_copy(sdi->channels);
	364	l = g_slist_remove_link(l, g_slist_nth(l, 0));
	365	meaning.channels = l;
	366	meaning.mq = SR_MQ_CURRENT;
	367	meaning.mqflags = SR_MQFLAG_DC;
	368	meaning.unit = SR_UNIT_AMPERE;
	369	encoding.digits = 3;
	370	analog.data = &devc->current;
	371	sr_session_send(sdi, &packet);
	372	g_slist_free(l);
	373
	374	/* End frame. */
	375	std_session_send_df_frame_end(sdi);
	376
	377	sr_sw_limits_update_samples_read(&devc->limits, 1);
	378	}
	379
	380	static void handle_new_data(const struct sr_dev_inst *sdi)
	381	{
	382	int len;
	383	struct dev_context *devc;
	384	struct sr_serial_dev_inst *serial;
	385	char *buf;
	386
	387	devc = sdi->priv;
	388	serial = sdi->conn;
	389
	390	len = RELOADPRO_BUFSIZE - devc->buflen;
	391	buf = devc->buf;
	392	g_mutex_lock(&devc->acquisition_mutex);
	393	if (serial_readline(serial, &buf, &len, 250) != SR_OK) {
	394	g_mutex_unlock(&devc->acquisition_mutex);
	395	return;
	396	}
	397
	398	if (len == 0) {
	399	g_mutex_unlock(&devc->acquisition_mutex);
	400	return; /* No new bytes, nothing to do. */
	401	}
	402	if (len < 0) {
	403	sr_err("Serial port read error: %d.", len);
	404	g_mutex_unlock(&devc->acquisition_mutex);
	405	return;
	406	}
	407	devc->buflen += len;
	408
	409	handle_packet(sdi);
	410	g_mutex_unlock(&devc->acquisition_mutex);
	411	memset(devc->buf, 0, RELOADPRO_BUFSIZE);
	412	devc->buflen = 0;
	413	}
	414
	415	SR_PRIV int reloadpro_receive_data(int fd, int revents, void *cb_data)
	416	{
	417	struct sr_dev_inst *sdi;
	418	struct dev_context *devc;
	419
	420	(void)fd;
	421
	422	sdi = cb_data;
	423	devc = sdi->priv;
	424
	425	if (revents != G_IO_IN)
	426	return TRUE;
	427
	428	handle_new_data(sdi);
	429
	430	if (sr_sw_limits_check(&devc->limits))
	431	sr_dev_acquisition_stop(sdi);
	432
	433	return TRUE;
	434	}