[libsigrok.git] / src / hardware / zketech-ebd-usb / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2018 Sven Bursch-Osewold <sb_git@bursch.com>
 *
 * 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"

/* Send a command to the device. */
SR_PRIV int zketech_ebd_usb_send(struct sr_serial_dev_inst *serial,
		uint8_t buf[], size_t count)
{
	int ret;

	zketech_ebd_usb_buffer_debug("Sending", buf, count);
	ret = serial_write_blocking(serial, buf, count, 0);
	if (ret < 0) {
		sr_err("Error sending command: %d.", ret);
		return ret;
	}
	sr_dbg("Sent %d bytes.", ret);

	return (ret == (int)count) ? SR_OK : SR_ERR;
}

/* Send the init/connect sequence; drive starts sending voltage and current. */
SR_PRIV int zketech_ebd_usb_init(struct sr_serial_dev_inst *serial,
		struct dev_context *devc)
{
	uint8_t init[] = { 0xfa, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0xf8 };

	(void)devc;

	int ret = zketech_ebd_usb_send(serial, init, 10);
	if (ret == SR_OK)
		devc->running = TRUE;

	return ret;
}

/* Start the load functionality. */
SR_PRIV int zketech_ebd_usb_loadstart(struct sr_serial_dev_inst *serial,
		struct dev_context *devc)
{
	uint8_t start[] = { 0xfa, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xf8 };
	int ret;

	ret = zketech_ebd_usb_send(serial, start, 10);
	sr_dbg("Current limit: %f.", devc->current_limit);
	if (zketech_ebd_usb_current_is0(devc))
		return SR_OK;

	ret = zketech_ebd_usb_sendcfg(serial, devc);
	if (ret == SR_OK) {
		sr_dbg("Load activated.");
		devc->load_activated = TRUE;
	}

	return ret;
}

/* Stop the load functionality. */
SR_PRIV int zketech_ebd_usb_loadstop(struct sr_serial_dev_inst *serial,
		struct dev_context *devc)
{
	int ret;
	uint8_t stop[] = { 0xfa, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xF8 };

	ret = zketech_ebd_usb_send(serial, stop, 10);
	if (ret == SR_OK)
		devc->load_activated = FALSE;

	return ret;
}

/* Stop the drive. */
SR_PRIV int zketech_ebd_usb_stop(struct sr_serial_dev_inst *serial,
		struct dev_context *devc)
{
	uint8_t stop[] = { 0xfa, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0xF8 };
	int ret;

	(void) devc;

	ret = zketech_ebd_usb_send(serial, stop, 10);
	if (ret == SR_OK) {
		devc->load_activated = FALSE;
		devc->running= FALSE;
	}

	return ret;
}

/* Send updated configuration values to the load. */
SR_PRIV int zketech_ebd_usb_sendcfg(struct sr_serial_dev_inst *serial,
		struct dev_context *devc)
{
	uint8_t send[] = { 0xfa, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8 };

	zketech_ebd_usb_value_encode(devc->current_limit, &send[2],
			&send[3], 1000.0);

	send[8] = send[1] ^ send[2] ^ send[3] ^ send[4] ^ send[5] ^ \
			send[6] ^ send[7];

	return zketech_ebd_usb_send(serial, send, 10);
}

/** Read count bytes from the serial connection. */
SR_PRIV int zketech_ebd_usb_read_chars(struct sr_serial_dev_inst *serial,
		int count, uint8_t *buf)
{
	int ret, received, turns;

	received = 0;
	turns = 0;

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

	zketech_ebd_usb_buffer_debug("Received", buf, received);

	return received;
}

/* Decode high byte and low byte into a float. */
SR_PRIV float zketech_ebd_usb_value_decode(uint8_t hi, uint8_t lo, float divisor)
{
	return ((float)hi * 240.0 + (float)lo) / divisor;
}

/* Encode a float into high byte and low byte. */
SR_PRIV void zketech_ebd_usb_value_encode(float current, uint8_t *hi,
		uint8_t *lo, float divisor)
{
	int value;

	value = (int)(current * divisor);
	sr_dbg("Value %d %d %d", value, value / 240, value % 240);
	*hi = value / 240;
	*lo = value % 240;
}

SR_PRIV int zketech_ebd_usb_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;
	float voltage, current, current_limit;
	GSList *l;

	(void)revents;
	(void)fd;

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

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

	serial = sdi->conn;

	uint8_t reply[MSGLEN];
	int ret = zketech_ebd_usb_read_chars(serial, MSGLEN, reply);

	/* Tests for correct message. */
	if (ret != MSGLEN) {
		sr_err("Message invalid [Len].");
		return (ret < 0) ? ret : SR_ERR;
	}

	uint8_t xor = reply[1] ^ reply[2] ^ reply[3] ^ reply[4] ^ \
		      reply[5] ^ reply[6] ^ reply[7] ^ reply[8] ^ \
		      reply[9] ^ reply[10] ^ reply[11] ^ reply[12] ^ \
		      reply[13] ^ reply[14] ^ reply[15] ^ reply[16];

	if (reply[MSGFRAMEBEGINPOS] != MSGFRAMEBEGIN || \
			reply[MSGFRAMEENDPOS] != MSGFRAMEEND || \
			xor != reply[MSGCHECKSUMPOS]) {
		sr_err("Message invalid [XOR, BEGIN/END].");
		return SR_ERR;
	}

	/* Calculate values. */
	sr_dbg("V: %02X %02X A: %02X %02X -- Limit %02X %02X", reply[4],
		reply[5], reply[2], reply[3], reply[10], reply[11]);

	voltage = zketech_ebd_usb_value_decode(reply[4], reply[5], 1000.0);
	current = zketech_ebd_usb_value_decode(reply[2], reply[3], 10000.0);
	current_limit = zketech_ebd_usb_value_decode(reply[10], reply[11], 1000.0);

	sr_dbg("Voltage %f", voltage);
	sr_dbg("Current %f", current);
	sr_dbg("Current limit %f", current_limit);

	/* Begin frame. */
	packet.type = SR_DF_FRAME_BEGIN;
	packet.payload = NULL;
	sr_session_send(sdi, &packet);

	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;
	analog.data = &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;
	analog.data = &current;
	sr_session_send(sdi, &packet);
	g_slist_free(l);

	/* End frame. */
	packet.type = SR_DF_FRAME_END;
	packet.payload = NULL;
	sr_session_send(sdi, &packet);

	sr_sw_limits_update_samples_read(&devc->limits, 1);
	if (sr_sw_limits_check(&devc->limits))
		sr_dev_acquisition_stop(sdi);

	return TRUE;
}

SR_PRIV int zketech_ebd_usb_get_current_limit(const struct sr_dev_inst *sdi,
		float *current)
{
	struct dev_context *devc;

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

	g_mutex_lock(&devc->rw_mutex);
	*current = devc->current_limit;
	g_mutex_unlock(&devc->rw_mutex);

	return SR_OK;
}

SR_PRIV int zketech_ebd_usb_set_current_limit(const struct sr_dev_inst *sdi,
		float current)
{
	struct dev_context *devc;
	int ret;

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

	g_mutex_lock(&devc->rw_mutex);
	devc->current_limit = current;

	if (!devc->running) {
		sr_dbg("Setting current limit later.");
		g_mutex_unlock(&devc->rw_mutex);
		return SR_OK;
	}

	sr_dbg("Setting current limit to %fV.", current);

	if (devc->load_activated) {
		if (zketech_ebd_usb_current_is0(devc)) {
			/* Stop load. */
			ret = zketech_ebd_usb_loadstop(sdi->conn, devc);
		} else {
			/* Send new current. */
			ret = zketech_ebd_usb_sendcfg(sdi->conn, devc);
		}
	} else {
		if (zketech_ebd_usb_current_is0(devc)) {
			/* Nothing to do. */
			ret = SR_OK;
		} else {
			/* Start load. */
			ret = zketech_ebd_usb_loadstart(sdi->conn, devc);
		}
	}

	g_mutex_unlock(&devc->rw_mutex);

	return ret;
}

SR_PRIV gboolean zketech_ebd_usb_current_is0(struct dev_context *devc)
{
	return devc->current_limit < 0.001;
}

/* Log a byte-array as hex values. */
SR_PRIV void zketech_ebd_usb_buffer_debug(const char *message, uint8_t buf[],
		size_t count)
{
	char buffer[count * 2 + 1];

	for (size_t j = 0; j < count; j++)
		sprintf(&buffer[2 * j], "%02X", buf[j]);

	buffer[count * 2] = 0;

	sr_dbg("%s: %s [%lu bytes]", message, buffer, count);
}
Commit	Line	Data
c527132a SBO	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2018 Sven Bursch-Osewold <sb_git@bursch.com>
	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 3 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 "protocol.h"
	22
9890fb1f SBO	23	/* Send a command to the device. */
	24	SR_PRIV int zketech_ebd_usb_send(struct sr_serial_dev_inst *serial,
	25	uint8_t buf[], size_t count)
	26	{
	27	int ret;
	28
	29	zketech_ebd_usb_buffer_debug("Sending", buf, count);
	30	ret = serial_write_blocking(serial, buf, count, 0);
	31	if (ret < 0) {
	32	sr_err("Error sending command: %d.", ret);
	33	return ret;
	34	}
	35	sr_dbg("Sent %d bytes.", ret);
	36
	37	return (ret == (int)count) ? SR_OK : SR_ERR;
	38	}
	39
	40	/* Send the init/connect sequence; drive starts sending voltage and current. */
	41	SR_PRIV int zketech_ebd_usb_init(struct sr_serial_dev_inst *serial,
	42	struct dev_context *devc)
	43	{
	44	uint8_t init[] = { 0xfa, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0xf8 };
	45
	46	(void)devc;
	47
	48	int ret = zketech_ebd_usb_send(serial, init, 10);
	49	if (ret == SR_OK)
	50	devc->running = TRUE;
	51
	52	return ret;
	53	}
	54
	55	/* Start the load functionality. */
	56	SR_PRIV int zketech_ebd_usb_loadstart(struct sr_serial_dev_inst *serial,
	57	struct dev_context *devc)
	58	{
	59	uint8_t start[] = { 0xfa, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xf8 };
	60	int ret;
	61
	62	ret = zketech_ebd_usb_send(serial, start, 10);
	63	sr_dbg("Current limit: %f.", devc->current_limit);
	64	if (zketech_ebd_usb_current_is0(devc))
	65	return SR_OK;
	66
	67	ret = zketech_ebd_usb_sendcfg(serial, devc);
	68	if (ret == SR_OK) {
	69	sr_dbg("Load activated.");
	70	devc->load_activated = TRUE;
	71	}
	72
	73	return ret;
	74	}
	75
	76	/* Stop the load functionality. */
	77	SR_PRIV int zketech_ebd_usb_loadstop(struct sr_serial_dev_inst *serial,
	78	struct dev_context *devc)
	79	{
	80	int ret;
	81	uint8_t stop[] = { 0xfa, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xF8 };
	82
	83	ret = zketech_ebd_usb_send(serial, stop, 10);
	84	if (ret == SR_OK)
	85	devc->load_activated = FALSE;
	86
87	return ret;
88	}
89
90	/* Stop the drive. */
91	SR_PRIV int zketech_ebd_usb_stop(struct sr_serial_dev_inst *serial,
92	struct dev_context *devc)
93	{
94	uint8_t stop[] = { 0xfa, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0xF8 };
95	int ret;
96
97	(void) devc;
98
99	ret = zketech_ebd_usb_send(serial, stop, 10);
100	if (ret == SR_OK) {
101	devc->load_activated = FALSE;
102	devc->running= FALSE;
103	}
104
105	return ret;
106	}
107
108	/* Send updated configuration values to the load. */
109	SR_PRIV int zketech_ebd_usb_sendcfg(struct sr_serial_dev_inst *serial,
110	struct dev_context *devc)
111	{
112	uint8_t send[] = { 0xfa, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8 };
113
114	zketech_ebd_usb_value_encode(devc->current_limit, &send[2],
115	&send[3], 1000.0);
116
117	send[8] = send[1] ^ send[2] ^ send[3] ^ send[4] ^ send[5] ^ \
118	send[6] ^ send[7];
119
120	return zketech_ebd_usb_send(serial, send, 10);
121	}
122
123	/** Read count bytes from the serial connection. */
124	SR_PRIV int zketech_ebd_usb_read_chars(struct sr_serial_dev_inst *serial,
125	int count, uint8_t *buf)
126	{
127	int ret, received, turns;
128
129	received = 0;
130	turns = 0;
131
132	do {
133	ret = serial_read_blocking(serial, buf + received,
134	count - received, serial_timeout(serial, count));
135	if (ret < 0) {
136	sr_err("Error %d reading %d bytes.", ret, count);
137	return ret;
138	}
139	received += ret;
140	turns++;
141	} while ((received < count) && (turns < 100));
142
143	zketech_ebd_usb_buffer_debug("Received", buf, received);
144
145	return received;
146	}
147
148	/* Decode high byte and low byte into a float. */
149	SR_PRIV float zketech_ebd_usb_value_decode(uint8_t hi, uint8_t lo, float divisor)
150	{
151	return ((float)hi * 240.0 + (float)lo) / divisor;
152	}
153
154	/* Encode a float into high byte and low byte. */
155	SR_PRIV void zketech_ebd_usb_value_encode(float current, uint8_t *hi,
156	uint8_t *lo, float divisor)
157	{
158	int value;
159
160	value = (int)(current * divisor);
161	sr_dbg("Value %d %d %d", value, value / 240, value % 240);
162	*hi = value / 240;
163	*lo = value % 240;
164	}
165
c527132a SBO	166	SR_PRIV int zketech_ebd_usb_receive_data(int fd, int revents, void *cb_data)
c527132a SBO	167	{
9890fb1f	168	struct sr_dev_inst *sdi;
c527132a	169	struct dev_context *devc;
9890fb1f SBO	170	struct sr_serial_dev_inst *serial;
	171	struct sr_datafeed_packet packet;
	172	struct sr_datafeed_analog analog;
	173	struct sr_analog_encoding encoding;
	174	struct sr_analog_meaning meaning;
	175	struct sr_analog_spec spec;
	176	float voltage, current, current_limit;
	177	GSList *l;
c527132a	178
9890fb1f	179	(void)revents;
c527132a SBO	180	(void)fd;
	181
	182	if (!(sdi = cb_data))
9890fb1f	183	return FALSE;
c527132a SBO	184
c527132a SBO	185	if (!(devc = sdi->priv))
9890fb1f SBO	186	return FALSE;
	187
	188	serial = sdi->conn;
	189
	190	uint8_t reply[MSGLEN];
	191	int ret = zketech_ebd_usb_read_chars(serial, MSGLEN, reply);
	192
	193	/* Tests for correct message. */
	194	if (ret != MSGLEN) {
	195	sr_err("Message invalid [Len].");
	196	return (ret < 0) ? ret : SR_ERR;
	197	}
c527132a	198
9890fb1f SBO	199	uint8_t xor = reply[1] ^ reply[2] ^ reply[3] ^ reply[4] ^ \
	200	reply[5] ^ reply[6] ^ reply[7] ^ reply[8] ^ \
	201	reply[9] ^ reply[10] ^ reply[11] ^ reply[12] ^ \
	202	reply[13] ^ reply[14] ^ reply[15] ^ reply[16];
	203
	204	if (reply[MSGFRAMEBEGINPOS] != MSGFRAMEBEGIN \|\| \
	205	reply[MSGFRAMEENDPOS] != MSGFRAMEEND \|\| \
	206	xor != reply[MSGCHECKSUMPOS]) {
	207	sr_err("Message invalid [XOR, BEGIN/END].");
	208	return SR_ERR;
c527132a SBO	209	}
c527132a SBO	210
9890fb1f SBO	211	/* Calculate values. */
	212	sr_dbg("V: %02X %02X A: %02X %02X -- Limit %02X %02X", reply[4],
	213	reply[5], reply[2], reply[3], reply[10], reply[11]);
	214
	215	voltage = zketech_ebd_usb_value_decode(reply[4], reply[5], 1000.0);
	216	current = zketech_ebd_usb_value_decode(reply[2], reply[3], 10000.0);
	217	current_limit = zketech_ebd_usb_value_decode(reply[10], reply[11], 1000.0);
	218
	219	sr_dbg("Voltage %f", voltage);
	220	sr_dbg("Current %f", current);
	221	sr_dbg("Current limit %f", current_limit);
	222
	223	/* Begin frame. */
	224	packet.type = SR_DF_FRAME_BEGIN;
	225	packet.payload = NULL;
	226	sr_session_send(sdi, &packet);
	227
	228	sr_analog_init(&analog, &encoding, &meaning, &spec, 4);
	229
	230	packet.type = SR_DF_ANALOG;
	231	packet.payload = &analog;
	232	analog.num_samples = 1;
	233
	234	/* Voltage */
	235	l = g_slist_copy(sdi->channels);
	236	l = g_slist_remove_link(l, g_slist_nth(l, 1));
	237	meaning.channels = l;
	238	meaning.mq = SR_MQ_VOLTAGE;
	239	meaning.mqflags = SR_MQFLAG_DC;
	240	meaning.unit = SR_UNIT_VOLT;
	241	analog.data = &voltage;
	242	sr_session_send(sdi, &packet);
	243	g_slist_free(l);
	244
	245	/* Current */
	246	l = g_slist_copy(sdi->channels);
	247	l = g_slist_remove_link(l, g_slist_nth(l, 0));
	248	meaning.channels = l;
	249	meaning.mq = SR_MQ_CURRENT;
	250	meaning.mqflags = SR_MQFLAG_DC;
	251	meaning.unit = SR_UNIT_AMPERE;
	252	analog.data = &current;
	253	sr_session_send(sdi, &packet);
	254	g_slist_free(l);
	255
	256	/* End frame. */
	257	packet.type = SR_DF_FRAME_END;
	258	packet.payload = NULL;
	259	sr_session_send(sdi, &packet);
	260
	261	sr_sw_limits_update_samples_read(&devc->limits, 1);
	262	if (sr_sw_limits_check(&devc->limits))
	263	sr_dev_acquisition_stop(sdi);
	264
c527132a SBO	265	return TRUE;
c527132a SBO	266	}
9890fb1f SBO	267
	268	SR_PRIV int zketech_ebd_usb_get_current_limit(const struct sr_dev_inst *sdi,
	269	float *current)
	270	{
	271	struct dev_context *devc;
	272
	273	if (!(devc = sdi->priv))
	274	return SR_ERR;
	275
	276	g_mutex_lock(&devc->rw_mutex);
	277	*current = devc->current_limit;
	278	g_mutex_unlock(&devc->rw_mutex);
	279
	280	return SR_OK;
	281	}
	282
	283	SR_PRIV int zketech_ebd_usb_set_current_limit(const struct sr_dev_inst *sdi,
	284	float current)
	285	{
	286	struct dev_context *devc;
	287	int ret;
	288
	289	if (!(devc = sdi->priv))
	290	return SR_ERR;
	291
	292	g_mutex_lock(&devc->rw_mutex);
	293	devc->current_limit = current;
	294
	295	if (!devc->running) {
	296	sr_dbg("Setting current limit later.");
	297	g_mutex_unlock(&devc->rw_mutex);
	298	return SR_OK;
	299	}
	300
	301	sr_dbg("Setting current limit to %fV.", current);
	302
	303	if (devc->load_activated) {
	304	if (zketech_ebd_usb_current_is0(devc)) {
	305	/* Stop load. */
	306	ret = zketech_ebd_usb_loadstop(sdi->conn, devc);
	307	} else {
	308	/* Send new current. */
	309	ret = zketech_ebd_usb_sendcfg(sdi->conn, devc);
	310	}
	311	} else {
	312	if (zketech_ebd_usb_current_is0(devc)) {
	313	/* Nothing to do. */
	314	ret = SR_OK;
	315	} else {
	316	/* Start load. */
	317	ret = zketech_ebd_usb_loadstart(sdi->conn, devc);
	318	}
	319	}
	320
	321	g_mutex_unlock(&devc->rw_mutex);
	322
	323	return ret;
	324	}
	325
	326	SR_PRIV gboolean zketech_ebd_usb_current_is0(struct dev_context *devc)
	327	{
	328	return devc->current_limit < 0.001;
	329	}
	330
331	/* Log a byte-array as hex values. */
332	SR_PRIV void zketech_ebd_usb_buffer_debug(const char *message, uint8_t buf[],
333	size_t count)
334	{
335	char buffer[count * 2 + 1];
336
337	for (size_t j = 0; j < count; j++)
338	sprintf(&buffer[2 * j], "%02X", buf[j]);
339
340	buffer[count * 2] = 0;
341
342	sr_dbg("%s: %s [%lu bytes]", message, buffer, count);
343	}