[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 drv_context *drvc;
	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, *devices;
	const struct pps_model *model;
	uint8_t packet[PACKET_SIZE];
	unsigned int i;
	int delay_ms, ret;
	const char *conn, *serialcomm;
	char channel[10];

	devices = NULL;
	drvc = di->context;
	drvc->instances = NULL;

	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->driver = di;
	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;
	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

	serial_close(serial);
	if (!devices)
		sr_serial_dev_inst_free(serial);

	return devices;
}

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, ret;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;

	ret = SR_OK;
	if (!cg) {
		/* No channel group: global options. */
		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 ret;
}

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;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	ret = SR_OK;
	devc = sdi->priv;
	if (!cg) {
		/* No channel group: global options. */
		switch (key) {
		case SR_CONF_CHANNEL_CONFIG:
			sval = g_variant_get_string(data, NULL);
			if ((ival = find_str(sval, channel_modes,
							ARRAY_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 {
		/* Channel group specified: per-channel options. */
		/* 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;
	GVariant *gvar;
	GVariantBuilder gvb;
	int channel, ret, i;

	/* Always available. */
	if (key == SR_CONF_SCAN_OPTIONS) {
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		return SR_OK;
	}

	if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		return SR_OK;
	}

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;
	ret = SR_OK;
	if (!cg) {
		/* No channel group: global options. */
		switch (key) {
		case SR_CONF_DEVICE_OPTIONS:
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
			break;
		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(channel_modes, ARRAY_SIZE(channel_modes));
			}
			break;
		default:
			return SR_ERR_NA;
		}
	} else {
		/* Channel group specified: per-channel options. */
		if (!sdi)
			return SR_ERR_ARG;
		/* 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 = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
			break;
		case SR_CONF_VOLTAGE_TARGET:
			g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
			/* Min, max, step. */
			for (i = 0; i < 3; i++) {
				gvar = g_variant_new_double(devc->model->channels[channel].voltage[i]);
				g_variant_builder_add_value(&gvb, gvar);
			}
			*data = g_variant_builder_end(&gvb);
			break;
		case SR_CONF_CURRENT_LIMIT:
			g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
			/* Min, max, step. */
			for (i = 0; i < 3; i++) {
				gvar = g_variant_new_double(devc->model->channels[channel].current[i]);
				g_variant_builder_add_value(&gvb, gvar);
			}
			*data = g_variant_builder_end(&gvb);
			break;
		default:
			return SR_ERR_NA;
		}
	}

	return ret;
}

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];

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	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, LOG_PREFIX);

	/* 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;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	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 = NULL,
	.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 drv_context *drvc;
	82	struct dev_context *devc;
	83	struct sr_config *src;
	84	struct sr_channel *ch;
	85	struct sr_channel_group *cg;
	86	struct sr_serial_dev_inst *serial;
	87	GSList l, devices;
	88	const struct pps_model *model;
	89	uint8_t packet[PACKET_SIZE];
	90	unsigned int i;
	91	int delay_ms, ret;
	92	const char conn, serialcomm;
	93	char channel[10];
	94
	95	devices = NULL;
	96	drvc = di->context;
	97	drvc->instances = NULL;
	98
	99	conn = serialcomm = NULL;
	100	for (l = options; l; l = l->next) {
	101	src = l->data;
	102	switch (src->key) {
	103	case SR_CONF_CONN:
	104	conn = g_variant_get_string(src->data, NULL);
	105	break;
	106	case SR_CONF_SERIALCOMM:
	107	serialcomm = g_variant_get_string(src->data, NULL);
	108	break;
	109	}
	110	}
	111	if (!conn)
	112	return NULL;
	113	if (!serialcomm)
	114	serialcomm = SERIALCOMM;
	115
	116	serial = sr_serial_dev_inst_new(conn, serialcomm);
	117
	118	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	119	return NULL;
	120
	121	serial_flush(serial);
	122
	123	/* This is how the vendor software scans for hardware. */
	124	memset(packet, 0, PACKET_SIZE);
	125	packet[0] = 0xaa;
	126	packet[1] = 0xaa;
	127	delay_ms = serial_timeout(serial, PACKET_SIZE);
	128	if (serial_write_blocking(serial, packet, PACKET_SIZE, delay_ms) < PACKET_SIZE) {
	129	sr_err("Unable to write while probing for hardware.");
	130	return NULL;
	131	}
	132	/* The device responds with a 24-byte packet when it receives a packet.
	133	* At 9600 baud, 300ms is long enough for it to have arrived. */
	134	g_usleep(300 * 1000);
	135	memset(packet, 0, PACKET_SIZE);
	136	if ((ret = serial_read_nonblocking(serial, packet, PACKET_SIZE)) < 0) {
	137	sr_err("Unable to read while probing for hardware: %s",
	138	sr_strerror(ret));
	139	return NULL;
	140	}
	141	if (ret != PACKET_SIZE \|\| packet[0] != 0xaa \|\| packet[1] != 0xaa) {
	142	/* Doesn't look like an Atten PPS. */
	143	return NULL;
	144	}
	145
	146	model = NULL;
	147	for (i = 0; i < ARRAY_SIZE(models); i++) {
	148	if (models[i].modelid == modelid) {
	149	model = &models[i];
	150	break;
	151	}
	152	}
	153	if (!model) {
	154	sr_err("Unknown modelid %d", modelid);
	155	return NULL;
	156	}
	157
	158	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	159	sdi->status = SR_ST_INACTIVE;
	160	sdi->vendor = g_strdup("Atten");
	161	sdi->model = g_strdup(model->name);
	162	sdi->driver = di;
	163	sdi->inst_type = SR_INST_SERIAL;
	164	sdi->conn = serial;
	165	for (i = 0; i < MAX_CHANNELS; i++) {
	166	snprintf(channel, 10, "CH%d", i + 1);
	167	ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel);
	168	cg = g_malloc(sizeof(struct sr_channel_group));
	169	cg->name = g_strdup(channel);
	170	cg->channels = g_slist_append(NULL, ch);
	171	cg->priv = NULL;
	172	sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	173	}
	174
	175	devc = g_malloc0(sizeof(struct dev_context));
	176	devc->model = model;
	177	devc->config = g_malloc0(sizeof(struct per_channel_config) * model->num_channels);
	178	devc->delay_ms = delay_ms;
	179	sdi->priv = devc;
	180	drvc->instances = g_slist_append(drvc->instances, sdi);
	181	devices = g_slist_append(devices, sdi);
	182
	183	serial_close(serial);
	184	if (!devices)
	185	sr_serial_dev_inst_free(serial);
	186
	187	return devices;
	188	}
	189
	190	static GSList scan_3203(struct sr_dev_driver di, GSList *options)
	191	{
	192	return scan(di, options, PPS_3203T_3S);
	193	}
	194
	195	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	196	const struct sr_channel_group *cg)
	197	{
	198	struct dev_context *devc;
	199	struct sr_channel *ch;
	200	int channel, ret;
	201
	202	if (!sdi)
	203	return SR_ERR_ARG;
	204
	205	devc = sdi->priv;
	206
	207	ret = SR_OK;
	208	if (!cg) {
	209	/* No channel group: global options. */
	210	switch (key) {
	211	case SR_CONF_CHANNEL_CONFIG:
	212	*data = g_variant_new_string(channel_modes[devc->channel_mode]);
	213	break;
	214	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
	215	*data = g_variant_new_boolean(devc->over_current_protection);
	216	break;
	217	default:
	218	return SR_ERR_NA;
	219	}
	220	} else {
	221	/* We only ever have one channel per channel group in this driver. */
	222	ch = cg->channels->data;
	223	channel = ch->index;
	224
	225	switch (key) {
	226	case SR_CONF_VOLTAGE:
	227	*data = g_variant_new_double(devc->config[channel].output_voltage_last);
	228	break;
	229	case SR_CONF_VOLTAGE_TARGET:
	230	*data = g_variant_new_double(devc->config[channel].output_voltage_max);
	231	break;
	232	case SR_CONF_CURRENT:
	233	*data = g_variant_new_double(devc->config[channel].output_current_last);
	234	break;
	235	case SR_CONF_CURRENT_LIMIT:
	236	*data = g_variant_new_double(devc->config[channel].output_current_max);
	237	break;
	238	case SR_CONF_ENABLED:
	239	*data = g_variant_new_boolean(devc->config[channel].output_enabled);
	240	break;
	241	default:
	242	return SR_ERR_NA;
	243	}
	244	}
	245
	246	return ret;
	247	}
	248
	249	static int find_str(const char str, const char *strings, int array_size)
	250	{
	251	int idx, i;
	252
	253	idx = -1;
	254	for (i = 0; i < array_size; i++) {
	255	if (!strcmp(str, strings[i])) {
	256	idx = i;
	257	break;
	258	}
	259	}
	260
	261	return idx;
	262	}
	263
	264	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	265	const struct sr_channel_group *cg)
	266	{
	267	struct dev_context *devc;
	268	struct sr_channel *ch;
	269	gdouble dval;
	270	int channel, ret, ival;
	271	const char *sval;
	272	gboolean bval;
	273
	274	if (sdi->status != SR_ST_ACTIVE)
	275	return SR_ERR_DEV_CLOSED;
	276
	277	ret = SR_OK;
	278	devc = sdi->priv;
	279	if (!cg) {
	280	/* No channel group: global options. */
	281	switch (key) {
	282	case SR_CONF_CHANNEL_CONFIG:
	283	sval = g_variant_get_string(data, NULL);
	284	if ((ival = find_str(sval, channel_modes,
	285	ARRAY_SIZE(channel_modes))) == -1) {
	286	ret = SR_ERR_ARG;
	287	break;
	288	}
	289	if (devc->model->channel_modes && (1 << ival) == 0) {
	290	/* Not supported on this model. */
	291	ret = SR_ERR_ARG;
	292	}
	293	if (ival == devc->channel_mode_set)
	294	/* Nothing to do. */
	295	break;
	296	devc->channel_mode_set = ival;
	297	devc->config_dirty = TRUE;
	298	break;
	299	case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
	300	bval = g_variant_get_boolean(data);
	301	if (bval == devc->over_current_protection_set)
	302	/* Nothing to do. */
	303	break;
	304	devc->over_current_protection_set = bval;
	305	devc->config_dirty = TRUE;
	306	break;
	307	default:
	308	return SR_ERR_NA;
	309	}
	310	} else {
	311	/* Channel group specified: per-channel options. */
	312	/* We only ever have one channel per channel group in this driver. */
	313	ch = cg->channels->data;
	314	channel = ch->index;
	315
	316	switch (key) {
	317	case SR_CONF_VOLTAGE_TARGET:
	318	dval = g_variant_get_double(data);
	319	if (dval < 0 \|\| dval > devc->model->channels[channel].voltage[1])
	320	ret = SR_ERR_ARG;
	321	devc->config[channel].output_voltage_max = dval;
	322	devc->config_dirty = TRUE;
	323	break;
	324	case SR_CONF_CURRENT_LIMIT:
	325	dval = g_variant_get_double(data);
	326	if (dval < 0 \|\| dval > devc->model->channels[channel].current[1])
	327	ret = SR_ERR_ARG;
	328	devc->config[channel].output_current_max = dval;
	329	devc->config_dirty = TRUE;
	330	break;
	331	case SR_CONF_ENABLED:
	332	bval = g_variant_get_boolean(data);
	333	if (bval == devc->config[channel].output_enabled_set)
	334	/* Nothing to do. */
	335	break;
	336	devc->config[channel].output_enabled_set = bval;
	337	devc->config_dirty = TRUE;
	338	break;
	339	default:
	340	ret = SR_ERR_NA;
	341	}
	342	}
	343
	344	return ret;
	345	}
	346
	347	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	348	const struct sr_channel_group *cg)
	349	{
	350	struct dev_context *devc;
	351	struct sr_channel *ch;
	352	GVariant *gvar;
	353	GVariantBuilder gvb;
	354	int channel, ret, i;
	355
	356	/* Always available. */
	357	if (key == SR_CONF_SCAN_OPTIONS) {
	358	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	359	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	360	return SR_OK;
	361	}
	362
	363	if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
	364	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	365	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	366	return SR_OK;
	367	}
	368
	369	if (!sdi)
	370	return SR_ERR_ARG;
	371
	372	devc = sdi->priv;
	373	ret = SR_OK;
	374	if (!cg) {
	375	/* No channel group: global options. */
	376	switch (key) {
	377	case SR_CONF_DEVICE_OPTIONS:
	378	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	379	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	380	break;
	381	case SR_CONF_CHANNEL_CONFIG:
	382	if (devc->model->channel_modes == CHANMODE_INDEPENDENT) {
	383	/* The 1-channel models. */
	384	*data = g_variant_new_strv(channel_modes, 1);
	385	} else {
	386	/* The other models support all modes. */
	387	*data = g_variant_new_strv(channel_modes, ARRAY_SIZE(channel_modes));
	388	}
	389	break;
	390	default:
	391	return SR_ERR_NA;
	392	}
	393	} else {
	394	/* Channel group specified: per-channel options. */
	395	if (!sdi)
	396	return SR_ERR_ARG;
	397	/* We only ever have one channel per channel group in this driver. */
	398	ch = cg->channels->data;
	399	channel = ch->index;
	400
	401	switch (key) {
	402	case SR_CONF_DEVICE_OPTIONS:
	403	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	404	devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
	405	break;
	406	case SR_CONF_VOLTAGE_TARGET:
	407	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	408	/* Min, max, step. */
	409	for (i = 0; i < 3; i++) {
	410	gvar = g_variant_new_double(devc->model->channels[channel].voltage[i]);
	411	g_variant_builder_add_value(&gvb, gvar);
	412	}
	413	*data = g_variant_builder_end(&gvb);
	414	break;
	415	case SR_CONF_CURRENT_LIMIT:
	416	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	417	/* Min, max, step. */
	418	for (i = 0; i < 3; i++) {
	419	gvar = g_variant_new_double(devc->model->channels[channel].current[i]);
	420	g_variant_builder_add_value(&gvb, gvar);
	421	}
	422	*data = g_variant_builder_end(&gvb);
	423	break;
	424	default:
	425	return SR_ERR_NA;
	426	}
	427	}
	428
	429	return ret;
	430	}
	431
	432	static int dev_close(struct sr_dev_inst *sdi)
	433	{
	434	struct dev_context *devc;
	435
	436	devc = sdi->priv;
	437	if (devc->config_dirty)
	438	/* Some configuration changes were queued up but didn't
	439	* get sent to the device, likely because we were never
	440	* in acquisition mode. Send them out now. */
	441	send_config(sdi);
	442
	443	return std_serial_dev_close(sdi);
	444	}
	445
	446	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	447	{
	448	struct dev_context *devc;
	449	struct sr_serial_dev_inst *serial;
	450	uint8_t packet[PACKET_SIZE];
	451
	452	if (sdi->status != SR_ST_ACTIVE)
	453	return SR_ERR_DEV_CLOSED;
	454
	455	devc = sdi->priv;
	456	memset(devc->packet, 0x44, PACKET_SIZE);
	457	devc->packet_size = 0;
	458
	459	devc->acquisition_running = TRUE;
	460
	461	serial = sdi->conn;
	462	serial_source_add(sdi->session, serial, G_IO_IN, 50,
	463	atten_pps3xxx_receive_data, (void *)sdi);
	464	std_session_send_df_header(sdi, LOG_PREFIX);
	465
	466	/* Send a "channel" configuration packet now. */
	467	memset(packet, 0, PACKET_SIZE);
	468	packet[0] = 0xaa;
	469	packet[1] = 0xaa;
	470	send_packet(sdi, packet);
	471
	472	return SR_OK;
	473	}
	474
	475	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	476	{
	477	struct dev_context *devc;
	478
	479	if (sdi->status != SR_ST_ACTIVE)
	480	return SR_ERR_DEV_CLOSED;
	481
	482	devc = sdi->priv;
	483	devc->acquisition_running = FALSE;
	484
	485	return SR_OK;
	486	}
	487
	488	static struct sr_dev_driver atten_pps3203_driver_info = {
	489	.name = "atten-pps3203",
	490	.longname = "Atten PPS3203T-3S",
	491	.api_version = 1,
	492	.init = std_init,
	493	.cleanup = std_cleanup,
	494	.scan = scan_3203,
	495	.dev_list = std_dev_list,
	496	.dev_clear = NULL,
	497	.config_get = config_get,
	498	.config_set = config_set,
	499	.config_list = config_list,
	500	.dev_open = std_serial_dev_open,
	501	.dev_close = dev_close,
	502	.dev_acquisition_start = dev_acquisition_start,
	503	.dev_acquisition_stop = dev_acquisition_stop,
	504	.context = NULL,
	505	};
	506	SR_REGISTER_DEV_DRIVER(atten_pps3203_driver_info);