[libsigrok.git] / src / hardware / atten-pps3xxx / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 Bert Vermeulen <bert@biot.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 <string.h>
#include "protocol.h"

/*
 * The default serial communication settings on the device are 9600
 * baud, 9 data bits. The 9th bit isn't actually used, and the vendor
 * software uses Mark parity to absorb the extra bit.
 *
 * Since 9 data bits is not a standard available in POSIX, we use two
 * stop bits to skip over the extra bit instead.
 */
#define SERIALCOMM "9600/8n2"

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

static const uint32_t drvopts[] = {
	SR_CONF_POWER_SUPPLY,
};

static const uint32_t devopts[] = {
	SR_CONF_CONTINUOUS,
	SR_CONF_CHANNEL_CONFIG | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_OVER_CURRENT_PROTECTION_ENABLED | SR_CONF_GET | SR_CONF_SET,
};

static const uint32_t devopts_cg[] = {
	SR_CONF_VOLTAGE | SR_CONF_GET,
	SR_CONF_VOLTAGE_TARGET | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_CURRENT | SR_CONF_GET,
	SR_CONF_CURRENT_LIMIT | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
};

static const char *channel_modes[] = {
	"Independent",
	"Series",
	"Parallel",
};

static const struct pps_model models[] = {
	{ PPS_3203T_3S, "PPS3203T-3S",
		CHANMODE_INDEPENDENT | CHANMODE_SERIES | CHANMODE_PARALLEL,
		3,
		{
			/* Channel 1 */
			{ { 0, 32, 0.01 }, { 0, 3, 0.001 } },
			/* Channel 2 */
			{ { 0, 32, 0.01 }, { 0, 3, 0.001 } },
			/* Channel 3 */
			{ { 0, 6, 0.01 }, { 0, 3, 0.001 } },
		},
	},
};

static GSList *scan(struct sr_dev_driver *di, GSList *options, int modelid)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_config *src;
	struct sr_channel *ch;
	struct sr_channel_group *cg;
	struct sr_serial_dev_inst *serial;
	GSList *l;
	const struct pps_model *model;
	uint8_t packet[PACKET_SIZE];
	unsigned int i;
	int delay_ms, ret;
	const char *conn, *serialcomm;
	char channel[10];

	conn = serialcomm = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		switch (src->key) {
		case SR_CONF_CONN:
			conn = g_variant_get_string(src->data, NULL);
			break;
		case SR_CONF_SERIALCOMM:
			serialcomm = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	if (!conn)
		return NULL;
	if (!serialcomm)
		serialcomm = SERIALCOMM;

	serial = sr_serial_dev_inst_new(conn, serialcomm);

	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
		return NULL;

	serial_flush(serial);

	/* This is how the vendor software scans for hardware. */
	memset(packet, 0, PACKET_SIZE);
	packet[0] = 0xaa;
	packet[1] = 0xaa;
	delay_ms = serial_timeout(serial, PACKET_SIZE);
	if (serial_write_blocking(serial, packet, PACKET_SIZE, delay_ms) < PACKET_SIZE) {
		sr_err("Unable to write while probing for hardware.");
		return NULL;
	}
	/* The device responds with a 24-byte packet when it receives a packet.
	 * At 9600 baud, 300ms is long enough for it to have arrived. */
	g_usleep(300 * 1000);
	memset(packet, 0, PACKET_SIZE);
	if ((ret = serial_read_nonblocking(serial, packet, PACKET_SIZE)) < 0) {
		sr_err("Unable to read while probing for hardware: %s",
				sr_strerror(ret));
		return NULL;
	}
	if (ret != PACKET_SIZE || packet[0] != 0xaa || packet[1] != 0xaa) {
		/* Doesn't look like an Atten PPS. */
		return NULL;
	}

	model = NULL;
	for (i = 0; i < ARRAY_SIZE(models); i++) {
		if (models[i].modelid == modelid) {
			model = &models[i];
			break;
		}
	}
	if (!model) {
		sr_err("Unknown modelid %d", modelid);
		return NULL;
	}

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->vendor = g_strdup("Atten");
	sdi->model = g_strdup(model->name);
	sdi->inst_type = SR_INST_SERIAL;
	sdi->conn = serial;
	for (i = 0; i < MAX_CHANNELS; i++) {
		snprintf(channel, 10, "CH%d", i + 1);
		ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel);
		cg = g_malloc(sizeof(struct sr_channel_group));
		cg->name = g_strdup(channel);
		cg->channels = g_slist_append(NULL, ch);
		cg->priv = NULL;
		sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	}

	devc = g_malloc0(sizeof(struct dev_context));
	devc->model = model;
	devc->config = g_malloc0(sizeof(struct per_channel_config) * model->num_channels);
	devc->delay_ms = delay_ms;
	sdi->priv = devc;

	serial_close(serial);

	return std_scan_complete(di, g_slist_append(NULL, sdi));
}

static GSList *scan_3203(struct sr_dev_driver *di, GSList *options)
{
	return scan(di, options, PPS_3203T_3S);
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	struct sr_channel *ch;
	int channel;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;

	if (!cg) {
		switch (key) {
		case SR_CONF_CHANNEL_CONFIG:
			*data = g_variant_new_string(channel_modes[devc->channel_mode]);
			break;
		case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
			*data = g_variant_new_boolean(devc->over_current_protection);
			break;
		default:
			return SR_ERR_NA;
		}
	} else {
		/* We only ever have one channel per channel group in this driver. */
		ch = cg->channels->data;
		channel = ch->index;

		switch (key) {
		case SR_CONF_VOLTAGE:
			*data = g_variant_new_double(devc->config[channel].output_voltage_last);
			break;
		case SR_CONF_VOLTAGE_TARGET:
			*data = g_variant_new_double(devc->config[channel].output_voltage_max);
			break;
		case SR_CONF_CURRENT:
			*data = g_variant_new_double(devc->config[channel].output_current_last);
			break;
		case SR_CONF_CURRENT_LIMIT:
			*data = g_variant_new_double(devc->config[channel].output_current_max);
			break;
		case SR_CONF_ENABLED:
			*data = g_variant_new_boolean(devc->config[channel].output_enabled);
			break;
		default:
			return SR_ERR_NA;
		}
	}

	return SR_OK;
}

static int find_str(const char *str, const char **strings, int array_size)
{
	int idx, i;

	idx = -1;
	for (i = 0; i < array_size; i++) {
		if (!strcmp(str, strings[i])) {
			idx = i;
			break;
		}
	}

	return idx;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	struct sr_channel *ch;
	gdouble dval;
	int channel, ret, ival;
	const char *sval;
	gboolean bval;

	ret = SR_OK;
	devc = sdi->priv;
	if (!cg) {
		switch (key) {
		case SR_CONF_CHANNEL_CONFIG:
			sval = g_variant_get_string(data, NULL);
			if ((ival = find_str(sval, ARRAY_AND_SIZE(channel_modes))) == -1) {
				ret = SR_ERR_ARG;
				break;
			}
			if (devc->model->channel_modes && (1 << ival) == 0) {
				/* Not supported on this model. */
				ret = SR_ERR_ARG;
			}
			if (ival == devc->channel_mode_set)
				/* Nothing to do. */
				break;
			devc->channel_mode_set = ival;
			devc->config_dirty = TRUE;
			break;
		case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
			bval = g_variant_get_boolean(data);
			if (bval == devc->over_current_protection_set)
				/* Nothing to do. */
				break;
			devc->over_current_protection_set = bval;
			devc->config_dirty = TRUE;
			break;
		default:
			return SR_ERR_NA;
		}
	} else {
		/* We only ever have one channel per channel group in this driver. */
		ch = cg->channels->data;
		channel = ch->index;

		switch (key) {
		case SR_CONF_VOLTAGE_TARGET:
			dval = g_variant_get_double(data);
			if (dval < 0 || dval > devc->model->channels[channel].voltage[1])
				ret = SR_ERR_ARG;
			devc->config[channel].output_voltage_max = dval;
			devc->config_dirty = TRUE;
			break;
		case SR_CONF_CURRENT_LIMIT:
			dval = g_variant_get_double(data);
			if (dval < 0 || dval > devc->model->channels[channel].current[1])
				ret = SR_ERR_ARG;
			devc->config[channel].output_current_max = dval;
			devc->config_dirty = TRUE;
			break;
		case SR_CONF_ENABLED:
			bval = g_variant_get_boolean(data);
			if (bval == devc->config[channel].output_enabled_set)
				/* Nothing to do. */
				break;
			devc->config[channel].output_enabled_set = bval;
			devc->config_dirty = TRUE;
			break;
		default:
			ret = SR_ERR_NA;
		}
	}

	return ret;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	struct sr_channel *ch;
	int channel;

	devc = (sdi) ? sdi->priv : NULL;

	if (!cg) {
		switch (key) {
		case SR_CONF_SCAN_OPTIONS:
		case SR_CONF_DEVICE_OPTIONS:
			return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
		case SR_CONF_CHANNEL_CONFIG:
			if (devc->model->channel_modes == CHANMODE_INDEPENDENT) {
				/* The 1-channel models. */
				*data = g_variant_new_strv(channel_modes, 1);
			} else {
				/* The other models support all modes. */
				*data = g_variant_new_strv(ARRAY_AND_SIZE(channel_modes));
			}
			break;
		default:
			return SR_ERR_NA;
		}
	} else {
		/* We only ever have one channel per channel group in this driver. */
		ch = cg->channels->data;
		channel = ch->index;

		switch (key) {
		case SR_CONF_DEVICE_OPTIONS:
			*data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
			break;
		case SR_CONF_VOLTAGE_TARGET:
			*data = std_gvar_min_max_step_array(devc->model->channels[channel].voltage);
			break;
		case SR_CONF_CURRENT_LIMIT:
			*data = std_gvar_min_max_step_array(devc->model->channels[channel].current);
			break;
		default:
			return SR_ERR_NA;
		}
	}

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

	if (devc->config_dirty)
		/* Some configuration changes were queued up but didn't
		 * get sent to the device, likely because we were never
		 * in acquisition mode. Send them out now. */
		send_config(sdi);

	return std_serial_dev_close(sdi);
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	uint8_t packet[PACKET_SIZE];

	devc = sdi->priv;
	memset(devc->packet, 0x44, PACKET_SIZE);
	devc->packet_size = 0;

	devc->acquisition_running = TRUE;

	serial = sdi->conn;
	serial_source_add(sdi->session, serial, G_IO_IN, 50,
			atten_pps3xxx_receive_data, (void *)sdi);
	std_session_send_df_header(sdi);

	/* Send a "channel" configuration packet now. */
	memset(packet, 0, PACKET_SIZE);
	packet[0] = 0xaa;
	packet[1] = 0xaa;
	send_packet(sdi, packet);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;
	devc->acquisition_running = FALSE;

	return SR_OK;
}

static struct sr_dev_driver atten_pps3203_driver_info = {
	.name = "atten-pps3203",
	.longname = "Atten PPS3203T-3S",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan_3203,
	.dev_list = std_dev_list,
	.dev_clear = std_dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = std_serial_dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(atten_pps3203_driver_info);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 Bert Vermeulen <bert@biot.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 <string.h>
	22	#include "protocol.h"
	23
	24	/*
	25	* The default serial communication settings on the device are 9600
	26	* baud, 9 data bits. The 9th bit isn't actually used, and the vendor
	27	* software uses Mark parity to absorb the extra bit.
	28	*
	29	* Since 9 data bits is not a standard available in POSIX, we use two
	30	* stop bits to skip over the extra bit instead.
	31	*/
	32	#define SERIALCOMM "9600/8n2"
	33
	34	static const uint32_t scanopts[] = {
	35	SR_CONF_CONN,
	36	SR_CONF_SERIALCOMM,
	37	};
	38
	39	static const uint32_t drvopts[] = {
	40	SR_CONF_POWER_SUPPLY,
	41	};
	42
	43	static const uint32_t devopts[] = {
	44	SR_CONF_CONTINUOUS,
	45	SR_CONF_CHANNEL_CONFIG \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	46	SR_CONF_OVER_CURRENT_PROTECTION_ENABLED \| SR_CONF_GET \| SR_CONF_SET,
	47	};
	48
	49	static const uint32_t devopts_cg[] = {
	50	SR_CONF_VOLTAGE \| SR_CONF_GET,
	51	SR_CONF_VOLTAGE_TARGET \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	52	SR_CONF_CURRENT \| SR_CONF_GET,
	53	SR_CONF_CURRENT_LIMIT \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	54	SR_CONF_ENABLED \| SR_CONF_GET \| SR_CONF_SET,
	55	};
	56
	57	static const char *channel_modes[] = {
	58	"Independent",
	59	"Series",
	60	"Parallel",
	61	};
	62
	63	static const struct pps_model models[] = {
	64	{ PPS_3203T_3S, "PPS3203T-3S",
	65	CHANMODE_INDEPENDENT \| CHANMODE_SERIES \| CHANMODE_PARALLEL,
	66	3,
	67	{
	68	/* Channel 1 */
	69	{ { 0, 32, 0.01 }, { 0, 3, 0.001 } },
	70	/* Channel 2 */
	71	{ { 0, 32, 0.01 }, { 0, 3, 0.001 } },
	72	/* Channel 3 */
	73	{ { 0, 6, 0.01 }, { 0, 3, 0.001 } },
	74	},
	75	},
	76	};
	77
	78	static GSList scan(struct sr_dev_driver di, GSList *options, int modelid)
	79	{
	80	struct sr_dev_inst *sdi;
	81	struct dev_context *devc;
	82	struct sr_config *src;
	83	struct sr_channel *ch;
	84	struct sr_channel_group *cg;
	85	struct sr_serial_dev_inst *serial;
	86	GSList *l;
	87	const struct pps_model *model;
	88	uint8_t packet[PACKET_SIZE];
	89	unsigned int i;
	90	int delay_ms, ret;
	91	const char conn, serialcomm;
	92	char channel[10];
	93
	94	conn = serialcomm = NULL;
	95	for (l = options; l; l = l->next) {
	96	src = l->data;
	97	switch (src->key) {
	98	case SR_CONF_CONN:
	99	conn = g_variant_get_string(src->data, NULL);
	100	break;
	101	case SR_CONF_SERIALCOMM:
	102	serialcomm = g_variant_get_string(src->data, NULL);
	103	break;
	104	}
	105	}
	106	if (!conn)
	107	return NULL;
	108	if (!serialcomm)
	109	serialcomm = SERIALCOMM;
	110
	111	serial = sr_serial_dev_inst_new(conn, serialcomm);
	112
	113	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	114	return NULL;
	115
	116	serial_flush(serial);
	117
	118	/* This is how the vendor software scans for hardware. */
	119	memset(packet, 0, PACKET_SIZE);
	120	packet[0] = 0xaa;
	121	packet[1] = 0xaa;
	122	delay_ms = serial_timeout(serial, PACKET_SIZE);
	123	if (serial_write_blocking(serial, packet, PACKET_SIZE, delay_ms) < PACKET_SIZE) {
	124	sr_err("Unable to write while probing for hardware.");
	125	return NULL;
	126	}
	127	/* The device responds with a 24-byte packet when it receives a packet.
	128	* At 9600 baud, 300ms is long enough for it to have arrived. */
	129	g_usleep(300 * 1000);
	130	memset(packet, 0, PACKET_SIZE);
	131	if ((ret = serial_read_nonblocking(serial, packet, PACKET_SIZE)) < 0) {
	132	sr_err("Unable to read while probing for hardware: %s",
	133	sr_strerror(ret));
	134	return NULL;
	135	}
	136	if (ret != PACKET_SIZE \|\| packet[0] != 0xaa \|\| packet[1] != 0xaa) {
	137	/* Doesn't look like an Atten PPS. */
	138	return NULL;
	139	}
	140
	141	model = NULL;
	142	for (i = 0; i < ARRAY_SIZE(models); i++) {
	143	if (models[i].modelid == modelid) {
	144	model = &models[i];
	145	break;
	146	}
	147	}
	148	if (!model) {
	149	sr_err("Unknown modelid %d", modelid);
	150	return NULL;
	151	}
	152
	153	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	154	sdi->status = SR_ST_INACTIVE;
	155	sdi->vendor = g_strdup("Atten");
	156	sdi->model = g_strdup(model->name);
	157	sdi->inst_type = SR_INST_SERIAL;
	158	sdi->conn = serial;
	159	for (i = 0; i < MAX_CHANNELS; i++) {
	160	snprintf(channel, 10, "CH%d", i + 1);
	161	ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel);
	162	cg = g_malloc(sizeof(struct sr_channel_group));
	163	cg->name = g_strdup(channel);
	164	cg->channels = g_slist_append(NULL, ch);
	165	cg->priv = NULL;
	166	sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	167	}
	168
	169	devc = g_malloc0(sizeof(struct dev_context));
	170	devc->model = model;
	171	devc->config = g_malloc0(sizeof(struct per_channel_config) * model->num_channels);
	172	devc->delay_ms = delay_ms;
	173	sdi->priv = devc;
	174
	175	serial_close(serial);
	176
	177	return std_scan_complete(di, g_slist_append(NULL, sdi));
	178	}
	179
	180	static GSList scan_3203(struct sr_dev_driver di, GSList *options)
	181	{
	182	return scan(di, options, PPS_3203T_3S);
	183	}
	184
	185	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	186	const struct sr_channel_group *cg)
	187	{
	188	struct dev_context *devc;
	189	struct sr_channel *ch;
	190	int channel;
	191
	192	if (!sdi)
	193	return SR_ERR_ARG;
	194
	195	devc = sdi->priv;
	196
	197	if (!cg) {
	198	switch (key) {
	199	case SR_CONF_CHANNEL_CONFIG:
	200	*data = g_variant_new_string(channel_modes[devc->channel_mode]);
	201	break;
	202	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
	203	*data = g_variant_new_boolean(devc->over_current_protection);
	204	break;
	205	default:
	206	return SR_ERR_NA;
	207	}
	208	} else {
	209	/* We only ever have one channel per channel group in this driver. */
	210	ch = cg->channels->data;
	211	channel = ch->index;
	212
	213	switch (key) {
	214	case SR_CONF_VOLTAGE:
	215	*data = g_variant_new_double(devc->config[channel].output_voltage_last);
	216	break;
	217	case SR_CONF_VOLTAGE_TARGET:
	218	*data = g_variant_new_double(devc->config[channel].output_voltage_max);
	219	break;
	220	case SR_CONF_CURRENT:
	221	*data = g_variant_new_double(devc->config[channel].output_current_last);
	222	break;
	223	case SR_CONF_CURRENT_LIMIT:
	224	*data = g_variant_new_double(devc->config[channel].output_current_max);
	225	break;
	226	case SR_CONF_ENABLED:
	227	*data = g_variant_new_boolean(devc->config[channel].output_enabled);
	228	break;
	229	default:
	230	return SR_ERR_NA;
	231	}
	232	}
	233
	234	return SR_OK;
	235	}
	236
	237	static int find_str(const char str, const char *strings, int array_size)
	238	{
	239	int idx, i;
	240
	241	idx = -1;
	242	for (i = 0; i < array_size; i++) {
	243	if (!strcmp(str, strings[i])) {
	244	idx = i;
	245	break;
	246	}
	247	}
	248
	249	return idx;
	250	}
	251
	252	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	253	const struct sr_channel_group *cg)
	254	{
	255	struct dev_context *devc;
	256	struct sr_channel *ch;
	257	gdouble dval;
	258	int channel, ret, ival;
	259	const char *sval;
	260	gboolean bval;
	261
	262	ret = SR_OK;
	263	devc = sdi->priv;
	264	if (!cg) {
	265	switch (key) {
	266	case SR_CONF_CHANNEL_CONFIG:
	267	sval = g_variant_get_string(data, NULL);
	268	if ((ival = find_str(sval, ARRAY_AND_SIZE(channel_modes))) == -1) {
	269	ret = SR_ERR_ARG;
	270	break;
	271	}
	272	if (devc->model->channel_modes && (1 << ival) == 0) {
	273	/* Not supported on this model. */
	274	ret = SR_ERR_ARG;
	275	}
	276	if (ival == devc->channel_mode_set)
	277	/* Nothing to do. */
	278	break;
	279	devc->channel_mode_set = ival;
	280	devc->config_dirty = TRUE;
	281	break;
	282	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
	283	bval = g_variant_get_boolean(data);
	284	if (bval == devc->over_current_protection_set)
	285	/* Nothing to do. */
	286	break;
	287	devc->over_current_protection_set = bval;
	288	devc->config_dirty = TRUE;
	289	break;
	290	default:
	291	return SR_ERR_NA;
	292	}
	293	} else {
	294	/* We only ever have one channel per channel group in this driver. */
	295	ch = cg->channels->data;
	296	channel = ch->index;
	297
	298	switch (key) {
	299	case SR_CONF_VOLTAGE_TARGET:
	300	dval = g_variant_get_double(data);
	301	if (dval < 0 \|\| dval > devc->model->channels[channel].voltage[1])
	302	ret = SR_ERR_ARG;
	303	devc->config[channel].output_voltage_max = dval;
	304	devc->config_dirty = TRUE;
	305	break;
	306	case SR_CONF_CURRENT_LIMIT:
	307	dval = g_variant_get_double(data);
	308	if (dval < 0 \|\| dval > devc->model->channels[channel].current[1])
	309	ret = SR_ERR_ARG;
	310	devc->config[channel].output_current_max = dval;
	311	devc->config_dirty = TRUE;
	312	break;
	313	case SR_CONF_ENABLED:
	314	bval = g_variant_get_boolean(data);
	315	if (bval == devc->config[channel].output_enabled_set)
	316	/* Nothing to do. */
	317	break;
	318	devc->config[channel].output_enabled_set = bval;
	319	devc->config_dirty = TRUE;
	320	break;
	321	default:
	322	ret = SR_ERR_NA;
	323	}
	324	}
	325
	326	return ret;
	327	}
	328
	329	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	330	const struct sr_channel_group *cg)
	331	{
	332	struct dev_context *devc;
	333	struct sr_channel *ch;
	334	int channel;
	335
	336	devc = (sdi) ? sdi->priv : NULL;
	337
	338	if (!cg) {
	339	switch (key) {
	340	case SR_CONF_SCAN_OPTIONS:
	341	case SR_CONF_DEVICE_OPTIONS:
	342	return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
	343	case SR_CONF_CHANNEL_CONFIG:
	344	if (devc->model->channel_modes == CHANMODE_INDEPENDENT) {
	345	/* The 1-channel models. */
	346	*data = g_variant_new_strv(channel_modes, 1);
	347	} else {
	348	/* The other models support all modes. */
	349	*data = g_variant_new_strv(ARRAY_AND_SIZE(channel_modes));
	350	}
	351	break;
	352	default:
	353	return SR_ERR_NA;
	354	}
	355	} else {
	356	/* We only ever have one channel per channel group in this driver. */
	357	ch = cg->channels->data;
	358	channel = ch->index;
	359
	360	switch (key) {
	361	case SR_CONF_DEVICE_OPTIONS:
	362	*data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
	363	break;
	364	case SR_CONF_VOLTAGE_TARGET:
	365	*data = std_gvar_min_max_step_array(devc->model->channels[channel].voltage);
	366	break;
	367	case SR_CONF_CURRENT_LIMIT:
	368	*data = std_gvar_min_max_step_array(devc->model->channels[channel].current);
	369	break;
	370	default:
	371	return SR_ERR_NA;
	372	}
	373	}
	374
	375	return SR_OK;
	376	}
	377
	378	static int dev_close(struct sr_dev_inst *sdi)
	379	{
	380	struct dev_context *devc;
	381
	382	devc = sdi->priv;
	383
	384	if (devc->config_dirty)
	385	/* Some configuration changes were queued up but didn't
	386	* get sent to the device, likely because we were never
	387	* in acquisition mode. Send them out now. */
	388	send_config(sdi);
	389
	390	return std_serial_dev_close(sdi);
	391	}
	392
	393	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	394	{
	395	struct dev_context *devc;
	396	struct sr_serial_dev_inst *serial;
	397	uint8_t packet[PACKET_SIZE];
	398
	399	devc = sdi->priv;
	400	memset(devc->packet, 0x44, PACKET_SIZE);
	401	devc->packet_size = 0;
	402
	403	devc->acquisition_running = TRUE;
	404
	405	serial = sdi->conn;
	406	serial_source_add(sdi->session, serial, G_IO_IN, 50,
	407	atten_pps3xxx_receive_data, (void *)sdi);
	408	std_session_send_df_header(sdi);
	409
	410	/* Send a "channel" configuration packet now. */
	411	memset(packet, 0, PACKET_SIZE);
	412	packet[0] = 0xaa;
	413	packet[1] = 0xaa;
	414	send_packet(sdi, packet);
	415
	416	return SR_OK;
	417	}
	418
	419	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	420	{
	421	struct dev_context *devc;
	422
	423	devc = sdi->priv;
	424	devc->acquisition_running = FALSE;
	425
	426	return SR_OK;
	427	}
	428
	429	static struct sr_dev_driver atten_pps3203_driver_info = {
	430	.name = "atten-pps3203",
	431	.longname = "Atten PPS3203T-3S",
	432	.api_version = 1,
	433	.init = std_init,
	434	.cleanup = std_cleanup,
	435	.scan = scan_3203,
	436	.dev_list = std_dev_list,
	437	.dev_clear = std_dev_clear,
	438	.config_get = config_get,
	439	.config_set = config_set,
	440	.config_list = config_list,
	441	.dev_open = std_serial_dev_open,
	442	.dev_close = dev_close,
	443	.dev_acquisition_start = dev_acquisition_start,
	444	.dev_acquisition_stop = dev_acquisition_stop,
	445	.context = NULL,
	446	};
	447	SR_REGISTER_DEV_DRIVER(atten_pps3203_driver_info);