[libsigrok.git] / src / hardware / hameg-hmo / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.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 <stdlib.h>
#include "protocol.h"

#define SERIALCOMM "115200/8n1/flow=1"

SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
static struct sr_dev_driver *di = &hameg_hmo_driver_info;

static const char *manufacturers[] = {
	"HAMEG",
};

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

enum {
	CG_INVALID = -1,
	CG_NONE,
	CG_ANALOG,
	CG_DIGITAL,
};

static int init(struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static int check_manufacturer(const char *manufacturer)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
		if (!strcmp(manufacturer, manufacturers[i]))
			return SR_OK;

	return SR_ERR;
}

static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi)
{
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	struct sr_scpi_hw_info *hw_info;

	sdi = NULL;
	devc = NULL;
	hw_info = NULL;

	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
		sr_info("Couldn't get IDN response.");
		goto fail;
	}

	if (check_manufacturer(hw_info->manufacturer) != SR_OK)
		goto fail;

	sdi = sr_dev_inst_new();
	sdi->status = SR_ST_ACTIVE;
	sdi->vendor = g_strdup(hw_info->manufacturer);
	sdi->model = g_strdup(hw_info->model);
	sdi->version = g_strdup(hw_info->firmware_version);
	sdi->serial_num = g_strdup(hw_info->serial_number);
	sdi->driver = di;
	sdi->inst_type = SR_INST_SCPI;
	sdi->conn = scpi;

	sr_scpi_hw_info_free(hw_info);
	hw_info = NULL;

	if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
		goto fail;

	sdi->priv = devc;

	if (hmo_init_device(sdi) != SR_OK)
		goto fail;

	sr_scpi_close(sdi->conn);

	sdi->status = SR_ST_INACTIVE;

	return sdi;

fail:
	if (hw_info)
		sr_scpi_hw_info_free(hw_info);
	if (sdi)
		sr_dev_inst_free(sdi);
	if (devc)
		g_free(devc);

	return NULL;
}

static GSList *scan(GSList *options)
{
	return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
}

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static void clear_helper(void *priv)
{
	struct dev_context *devc;

	devc = priv;

	hmo_scope_state_free(devc->model_state);

	g_free(devc->analog_groups);
	g_free(devc->digital_groups);

	g_free(devc);
}

static int dev_clear(void)
{
	return std_dev_clear(di, clear_helper);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
		return SR_ERR;

	if (hmo_scope_state_get(sdi) != SR_OK)
		return SR_ERR;

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	if (sdi->status == SR_ST_INACTIVE)
		return SR_OK;

	sr_scpi_close(sdi->conn);

	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(void)
{
	dev_clear();

	return SR_OK;
}

static int check_channel_group(struct dev_context *devc,
			     const struct sr_channel_group *cg)
{
	unsigned int i;
	struct scope_config *model;

	model = devc->model_config;

	if (!cg)
		return CG_NONE;

	for (i = 0; i < model->analog_channels; ++i)
		if (cg == devc->analog_groups[i])
			return CG_ANALOG;

	for (i = 0; i < model->digital_pods; ++i)
		if (cg == devc->digital_groups[i])
			return CG_DIGITAL;

	sr_err("Invalid channel group specified.");

	return CG_INVALID;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		      const struct sr_channel_group *cg)
{
	int ret, cg_type;
	unsigned int i;
	struct dev_context *devc;
	struct scope_config *model;
	struct scope_state *state;

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

	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
		return SR_ERR;

	ret = SR_ERR_NA;
	model = devc->model_config;
	state = devc->model_state;

	switch (key) {
	case SR_CONF_NUM_TIMEBASE:
		*data = g_variant_new_int32(model->num_xdivs);
		ret = SR_OK;
		break;
	case SR_CONF_TIMEBASE:
		*data = g_variant_new("(tt)", (*model->timebases)[state->timebase][0],
				      (*model->timebases)[state->timebase][1]);
		ret = SR_OK;
		break;
	case SR_CONF_NUM_VDIV:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		} else if (cg_type == CG_ANALOG) {
			for (i = 0; i < model->analog_channels; ++i) {
				if (cg != devc->analog_groups[i])
					continue;
				*data = g_variant_new_int32(model->num_ydivs);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		break;
	case SR_CONF_VDIV:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		} else if (cg_type == CG_ANALOG) {
			for (i = 0; i < model->analog_channels; ++i) {
				if (cg != devc->analog_groups[i])
					continue;
				*data = g_variant_new("(tt)",
						      (*model->vdivs)[state->analog_channels[i].vdiv][0],
						      (*model->vdivs)[state->analog_channels[i].vdiv][1]);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = g_variant_new_string((*model->trigger_sources)[state->trigger_source]);
		ret = SR_OK;
		break;
	case SR_CONF_TRIGGER_SLOPE:
		*data = g_variant_new_string((*model->trigger_slopes)[state->trigger_slope]);
		ret = SR_OK;
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		*data = g_variant_new_double(state->horiz_triggerpos);
		ret = SR_OK;
		break;
	case SR_CONF_COUPLING:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		} else if (cg_type == CG_ANALOG) {
			for (i = 0; i < model->analog_channels; ++i) {
				if (cg != devc->analog_groups[i])
					continue;
				*data = g_variant_new_string((*model->coupling_options)[state->analog_channels[i].coupling]);
				ret = SR_OK;
				break;
			}

		} else {
			ret = SR_ERR_NA;
		}
		break;
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(state->sample_rate);
		ret = SR_OK;
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
{
	unsigned int i;
	GVariant *rational[2];
	GVariantBuilder gvb;

	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);

	for (i = 0; i < n; i++) {
		rational[0] = g_variant_new_uint64((*array)[i][0]);
		rational[1] = g_variant_new_uint64((*array)[i][1]);

		/* FIXME: Valgrind reports a memory leak here. */
		g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	}

	return g_variant_builder_end(&gvb);
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		      const struct sr_channel_group *cg)
{
	int ret, cg_type;
	unsigned int i, j;
	char command[MAX_COMMAND_SIZE], float_str[30];
	struct dev_context *devc;
	struct scope_config *model;
	struct scope_state *state;
	const char *tmp;
	uint64_t p, q;
	double tmp_d;
	gboolean update_sample_rate;

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

	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
		return SR_ERR;

	model = devc->model_config;
	state = devc->model_state;
	update_sample_rate = FALSE;

	ret = SR_ERR_NA;

	switch (key) {
	case SR_CONF_LIMIT_FRAMES:
		devc->frame_limit = g_variant_get_uint64(data);
		ret = SR_OK;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		tmp = g_variant_get_string(data, NULL);
		for (i = 0; (*model->trigger_sources)[i]; i++) {
			if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
				continue;
			state->trigger_source = i;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
				   (*model->trigger_sources)[i]);

			ret = sr_scpi_send(sdi->conn, command);
			break;
		}
		break;
	case SR_CONF_VDIV:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		}

		g_variant_get(data, "(tt)", &p, &q);

		for (i = 0; i < model->num_vdivs; i++) {
			if (p != (*model->vdivs)[i][0] ||
			    q != (*model->vdivs)[i][1])
				continue;
			for (j = 1; j <= model->analog_channels; ++j) {
				if (cg != devc->analog_groups[j - 1])
					continue;
				state->analog_channels[j - 1].vdiv = i;
				g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
				g_snprintf(command, sizeof(command),
					   (*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
					   j, float_str);

				if (sr_scpi_send(sdi->conn, command) != SR_OK ||
				    sr_scpi_get_opc(sdi->conn) != SR_OK)
					return SR_ERR;

				break;
			}

			ret = SR_OK;
			break;
		}
		break;
	case SR_CONF_TIMEBASE:
		g_variant_get(data, "(tt)", &p, &q);

		for (i = 0; i < model->num_timebases; i++) {
			if (p != (*model->timebases)[i][0] ||
			    q != (*model->timebases)[i][1])
				continue;
			state->timebase = i;
			g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
				   float_str);

			ret = sr_scpi_send(sdi->conn, command);
			update_sample_rate = TRUE;
			break;
		}
		break;
	case SR_CONF_HORIZ_TRIGGERPOS:
		tmp_d = g_variant_get_double(data);

		if (tmp_d < 0.0 || tmp_d > 1.0)
			return SR_ERR;

		state->horiz_triggerpos = tmp_d;
		tmp_d = -(tmp_d - 0.5) *
			((double) (*model->timebases)[state->timebase][0] /
			(*model->timebases)[state->timebase][1])
			 * model->num_xdivs;

		g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
			   float_str);

		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		tmp = g_variant_get_string(data, NULL);

		if (!tmp || !(tmp[0] == 'f' || tmp[0] == 'r'))
			return SR_ERR_ARG;

		state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;

		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
			   (state->trigger_slope == 0) ? "POS" : "NEG");

		ret = sr_scpi_send(sdi->conn, command);
		break;
	case SR_CONF_COUPLING:
		if (cg_type == CG_NONE) {
			sr_err("No channel group specified.");
			return SR_ERR_CHANNEL_GROUP;
		}

		tmp = g_variant_get_string(data, NULL);

		for (i = 0; (*model->coupling_options)[i]; i++) {
			if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
				continue;
			for (j = 1; j <= model->analog_channels; ++j) {
				if (cg != devc->analog_groups[j - 1])
					continue;
				state->analog_channels[j-1].coupling = i;

				g_snprintf(command, sizeof(command),
					   (*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
					   j, tmp);

				if (sr_scpi_send(sdi->conn, command) != SR_OK ||
				    sr_scpi_get_opc(sdi->conn) != SR_OK)
					return SR_ERR;
				break;
			}

			ret = SR_OK;
			break;
		}
		break;
	default:
		ret = SR_ERR_NA;
		break;
	}

	if (ret == SR_OK)
		ret = sr_scpi_get_opc(sdi->conn);

	if (ret == SR_OK && update_sample_rate)
		ret = hmo_update_sample_rate(sdi);

	return ret;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		       const struct sr_channel_group *cg)
{
	int cg_type;
	struct dev_context *devc;
	struct scope_config *model;

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

	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
		return SR_ERR;

	model = devc->model_config;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		if (cg_type == CG_NONE) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				model->devopts, model->num_devopts,
				sizeof(uint32_t));
		} else if (cg_type == CG_ANALOG) {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				model->analog_devopts, model->num_analog_devopts,
				sizeof(uint32_t));
		} else {
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				NULL, 0, sizeof(uint32_t));
		}
		break;
	case SR_CONF_COUPLING:
		if (cg_type == CG_NONE)
			return SR_ERR_CHANNEL_GROUP;
		*data = g_variant_new_strv(*model->coupling_options,
			   g_strv_length((char **)*model->coupling_options));
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = g_variant_new_strv(*model->trigger_sources,
			   g_strv_length((char **)*model->trigger_sources));
		break;
	case SR_CONF_TRIGGER_SLOPE:
		*data = g_variant_new_strv(*model->trigger_slopes,
			   g_strv_length((char **)*model->trigger_slopes));
		break;
	case SR_CONF_TIMEBASE:
		*data = build_tuples(model->timebases, model->num_timebases);
		break;
	case SR_CONF_VDIV:
		if (cg_type == CG_NONE)
			return SR_ERR_CHANNEL_GROUP;
		*data = build_tuples(model->vdivs, model->num_vdivs);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
{
	char command[MAX_COMMAND_SIZE];
	struct sr_channel *ch;
	struct dev_context *devc;
	struct scope_config *model;

	devc = sdi->priv;
	model = devc->model_config;

	ch = devc->current_channel->data;

	switch (ch->type) {
	case SR_CHANNEL_ANALOG:
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
			   ch->index + 1);
		break;
	case SR_CHANNEL_LOGIC:
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
			   ch->index < 8 ? 1 : 2);
		break;
	default:
		sr_err("Invalid channel type.");
		break;
	}

	return sr_scpi_send(sdi->conn, command);
}

static int hmo_check_channels(GSList *channels)
{
	GSList *l;
	struct sr_channel *ch;
	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;

	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;

	for (l = channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_ANALOG:
			if (ch->index == 2)
				enabled_chan3 = TRUE;
			else if (ch->index == 3)
				enabled_chan4 = TRUE;
			break;
		case SR_CHANNEL_LOGIC:
			if (ch->index < 8)
				enabled_pod1 = TRUE;
			else
				enabled_pod2 = TRUE;
			break;
		default:
			return SR_ERR;
		}
	}

	if ((enabled_pod1 && enabled_chan3) ||
	    (enabled_pod2 && enabled_chan4))
		return SR_ERR;

	return SR_OK;
}

static int hmo_setup_channels(const struct sr_dev_inst *sdi)
{
	GSList *l;
	unsigned int i;
	gboolean *pod_enabled, setup_changed;
	char command[MAX_COMMAND_SIZE];
	struct scope_state *state;
	struct scope_config *model;
	struct sr_channel *ch;
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;

	devc = sdi->priv;
	scpi = sdi->conn;
	state = devc->model_state;
	model = devc->model_config;
	setup_changed = FALSE;

	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);

	for (l = sdi->channels; l; l = l->next) {
		ch = l->data;
		switch (ch->type) {
		case SR_CHANNEL_ANALOG:
			if (ch->enabled == state->analog_channels[ch->index].state)
				break;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
				   ch->index + 1, ch->enabled);

			if (sr_scpi_send(scpi, command) != SR_OK)
				return SR_ERR;
			state->analog_channels[ch->index].state = ch->enabled;
			setup_changed = TRUE;
			break;
		case SR_CHANNEL_LOGIC:
			/*
			 * A digital POD needs to be enabled for every group of
			 * 8 channels.
			 */
			if (ch->enabled)
				pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;

			if (ch->enabled == state->digital_channels[ch->index])
				break;
			g_snprintf(command, sizeof(command),
				   (*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
				   ch->index, ch->enabled);

			if (sr_scpi_send(scpi, command) != SR_OK)
				return SR_ERR;

			state->digital_channels[ch->index] = ch->enabled;
			setup_changed = TRUE;
			break;
		default:
			return SR_ERR;
		}
	}

	for (i = 1; i <= model->digital_pods; ++i) {
		if (state->digital_pods[i - 1] == pod_enabled[i - 1])
			continue;
		g_snprintf(command, sizeof(command),
			   (*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
			   i, pod_enabled[i - 1]);
		if (sr_scpi_send(scpi, command) != SR_OK)
			return SR_ERR;
		state->digital_pods[i - 1] = pod_enabled[i - 1];
		setup_changed = TRUE;
	}

	g_free(pod_enabled);

	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
		return SR_ERR;

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	GSList *l;
	gboolean digital_added;
	struct sr_channel *ch;
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;

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

	scpi = sdi->conn;
	devc = sdi->priv;
	digital_added = FALSE;

	g_slist_free(devc->enabled_channels);
	devc->enabled_channels = NULL;

	for (l = sdi->channels; l; l = l->next) {
		ch = l->data;
		if (!ch->enabled)
			continue;
		/* Only add a single digital channel. */
		if (ch->type != SR_CHANNEL_LOGIC || !digital_added) {
			devc->enabled_channels = g_slist_append(
					devc->enabled_channels, ch);
			if (ch->type == SR_CHANNEL_LOGIC)
				digital_added = TRUE;
		}
	}

	if (!devc->enabled_channels)
		return SR_ERR;

	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
		sr_err("Invalid channel configuration specified!");
		return SR_ERR_NA;
	}

	if (hmo_setup_channels(sdi) != SR_OK) {
		sr_err("Failed to setup channel configuration!");
		return SR_ERR;
	}

	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
			hmo_receive_data, (void *)sdi);

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	devc->current_channel = devc->enabled_channels;

	return hmo_request_data(sdi);
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;
	struct sr_datafeed_packet packet;

	(void)cb_data;

	packet.type = SR_DF_END;
	packet.payload = NULL;
	sr_session_send(sdi, &packet);

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

	devc = sdi->priv;

	devc->num_frames = 0;
	g_slist_free(devc->enabled_channels);
	devc->enabled_channels = NULL;
	scpi = sdi->conn;
	sr_scpi_source_remove(sdi->session, scpi);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	.name = "hameg-hmo",
	.longname = "Hameg HMO",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.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 <stdlib.h>
	21	#include "protocol.h"
	22
	23	#define SERIALCOMM "115200/8n1/flow=1"
	24
	25	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info;
	26	static struct sr_dev_driver *di = &hameg_hmo_driver_info;
	27
	28	static const char *manufacturers[] = {
	29	"HAMEG",
	30	};
	31
	32	static const uint32_t scanopts[] = {
	33	SR_CONF_CONN,
	34	SR_CONF_SERIALCOMM,
	35	};
	36
	37	enum {
	38	CG_INVALID = -1,
	39	CG_NONE,
	40	CG_ANALOG,
	41	CG_DIGITAL,
	42	};
	43
	44	static int init(struct sr_context *sr_ctx)
	45	{
	46	return std_init(sr_ctx, di, LOG_PREFIX);
	47	}
	48
	49	static int check_manufacturer(const char *manufacturer)
	50	{
	51	unsigned int i;
	52
	53	for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
	54	if (!strcmp(manufacturer, manufacturers[i]))
	55	return SR_OK;
	56
	57	return SR_ERR;
	58	}
	59
	60	static struct sr_dev_inst hmo_probe_serial_device(struct sr_scpi_dev_inst scpi)
	61	{
	62	struct sr_dev_inst *sdi;
	63	struct dev_context *devc;
	64	struct sr_scpi_hw_info *hw_info;
	65
	66	sdi = NULL;
	67	devc = NULL;
	68	hw_info = NULL;
	69
	70	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
	71	sr_info("Couldn't get IDN response.");
	72	goto fail;
	73	}
	74
	75	if (check_manufacturer(hw_info->manufacturer) != SR_OK)
	76	goto fail;
	77
	78	sdi = sr_dev_inst_new();
	79	sdi->status = SR_ST_ACTIVE;
	80	sdi->vendor = g_strdup(hw_info->manufacturer);
	81	sdi->model = g_strdup(hw_info->model);
	82	sdi->version = g_strdup(hw_info->firmware_version);
	83	sdi->serial_num = g_strdup(hw_info->serial_number);
	84	sdi->driver = di;
	85	sdi->inst_type = SR_INST_SCPI;
	86	sdi->conn = scpi;
	87
	88	sr_scpi_hw_info_free(hw_info);
	89	hw_info = NULL;
	90
	91	if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
	92	goto fail;
	93
	94	sdi->priv = devc;
	95
	96	if (hmo_init_device(sdi) != SR_OK)
	97	goto fail;
	98
	99	sr_scpi_close(sdi->conn);
	100
	101	sdi->status = SR_ST_INACTIVE;
	102
	103	return sdi;
	104
	105	fail:
	106	if (hw_info)
	107	sr_scpi_hw_info_free(hw_info);
	108	if (sdi)
	109	sr_dev_inst_free(sdi);
	110	if (devc)
	111	g_free(devc);
	112
	113	return NULL;
	114	}
	115
	116	static GSList scan(GSList options)
	117	{
	118	return sr_scpi_scan(di->priv, options, hmo_probe_serial_device);
	119	}
	120
	121	static GSList *dev_list(void)
	122	{
	123	return ((struct drv_context *)(di->priv))->instances;
	124	}
	125
	126	static void clear_helper(void *priv)
	127	{
	128	struct dev_context *devc;
	129
	130	devc = priv;
	131
	132	hmo_scope_state_free(devc->model_state);
	133
	134	g_free(devc->analog_groups);
	135	g_free(devc->digital_groups);
	136
	137	g_free(devc);
	138	}
	139
	140	static int dev_clear(void)
	141	{
	142	return std_dev_clear(di, clear_helper);
	143	}
	144
	145	static int dev_open(struct sr_dev_inst *sdi)
	146	{
	147	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
	148	return SR_ERR;
	149
	150	if (hmo_scope_state_get(sdi) != SR_OK)
	151	return SR_ERR;
	152
	153	sdi->status = SR_ST_ACTIVE;
	154
	155	return SR_OK;
	156	}
	157
	158	static int dev_close(struct sr_dev_inst *sdi)
	159	{
	160	if (sdi->status == SR_ST_INACTIVE)
	161	return SR_OK;
	162
	163	sr_scpi_close(sdi->conn);
	164
	165	sdi->status = SR_ST_INACTIVE;
	166
	167	return SR_OK;
	168	}
	169
	170	static int cleanup(void)
	171	{
	172	dev_clear();
	173
	174	return SR_OK;
	175	}
	176
	177	static int check_channel_group(struct dev_context *devc,
	178	const struct sr_channel_group *cg)
	179	{
	180	unsigned int i;
	181	struct scope_config *model;
	182
	183	model = devc->model_config;
	184
	185	if (!cg)
	186	return CG_NONE;
	187
	188	for (i = 0; i < model->analog_channels; ++i)
	189	if (cg == devc->analog_groups[i])
	190	return CG_ANALOG;
	191
	192	for (i = 0; i < model->digital_pods; ++i)
	193	if (cg == devc->digital_groups[i])
	194	return CG_DIGITAL;
	195
	196	sr_err("Invalid channel group specified.");
	197
	198	return CG_INVALID;
	199	}
	200
	201	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	202	const struct sr_channel_group *cg)
	203	{
	204	int ret, cg_type;
	205	unsigned int i;
	206	struct dev_context *devc;
	207	struct scope_config *model;
	208	struct scope_state *state;
	209
	210	if (!sdi \|\| !(devc = sdi->priv))
	211	return SR_ERR_ARG;
	212
	213	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	214	return SR_ERR;
	215
	216	ret = SR_ERR_NA;
	217	model = devc->model_config;
	218	state = devc->model_state;
	219
	220	switch (key) {
	221	case SR_CONF_NUM_TIMEBASE:
	222	*data = g_variant_new_int32(model->num_xdivs);
	223	ret = SR_OK;
	224	break;
	225	case SR_CONF_TIMEBASE:
	226	data = g_variant_new("(tt)", (model->timebases)[state->timebase][0],
	227	(*model->timebases)[state->timebase][1]);
	228	ret = SR_OK;
	229	break;
	230	case SR_CONF_NUM_VDIV:
	231	if (cg_type == CG_NONE) {
	232	sr_err("No channel group specified.");
	233	return SR_ERR_CHANNEL_GROUP;
	234	} else if (cg_type == CG_ANALOG) {
	235	for (i = 0; i < model->analog_channels; ++i) {
	236	if (cg != devc->analog_groups[i])
	237	continue;
	238	*data = g_variant_new_int32(model->num_ydivs);
	239	ret = SR_OK;
	240	break;
	241	}
	242
	243	} else {
	244	ret = SR_ERR_NA;
	245	}
	246	break;
	247	case SR_CONF_VDIV:
	248	if (cg_type == CG_NONE) {
	249	sr_err("No channel group specified.");
	250	return SR_ERR_CHANNEL_GROUP;
	251	} else if (cg_type == CG_ANALOG) {
	252	for (i = 0; i < model->analog_channels; ++i) {
	253	if (cg != devc->analog_groups[i])
	254	continue;
	255	*data = g_variant_new("(tt)",
	256	(*model->vdivs)[state->analog_channels[i].vdiv][0],
	257	(*model->vdivs)[state->analog_channels[i].vdiv][1]);
	258	ret = SR_OK;
	259	break;
	260	}
	261
	262	} else {
	263	ret = SR_ERR_NA;
	264	}
	265	break;
	266	case SR_CONF_TRIGGER_SOURCE:
	267	data = g_variant_new_string((model->trigger_sources)[state->trigger_source]);
	268	ret = SR_OK;
	269	break;
	270	case SR_CONF_TRIGGER_SLOPE:
	271	data = g_variant_new_string((model->trigger_slopes)[state->trigger_slope]);
	272	ret = SR_OK;
	273	break;
	274	case SR_CONF_HORIZ_TRIGGERPOS:
	275	*data = g_variant_new_double(state->horiz_triggerpos);
	276	ret = SR_OK;
	277	break;
	278	case SR_CONF_COUPLING:
	279	if (cg_type == CG_NONE) {
	280	sr_err("No channel group specified.");
	281	return SR_ERR_CHANNEL_GROUP;
	282	} else if (cg_type == CG_ANALOG) {
	283	for (i = 0; i < model->analog_channels; ++i) {
	284	if (cg != devc->analog_groups[i])
	285	continue;
	286	data = g_variant_new_string((model->coupling_options)[state->analog_channels[i].coupling]);
	287	ret = SR_OK;
	288	break;
	289	}
	290
	291	} else {
	292	ret = SR_ERR_NA;
	293	}
	294	break;
	295	case SR_CONF_SAMPLERATE:
	296	*data = g_variant_new_uint64(state->sample_rate);
	297	ret = SR_OK;
	298	break;
	299	default:
	300	ret = SR_ERR_NA;
	301	}
	302
	303	return ret;
	304	}
	305
	306	static GVariant build_tuples(const uint64_t (array)[][2], unsigned int n)
	307	{
	308	unsigned int i;
	309	GVariant *rational[2];
	310	GVariantBuilder gvb;
	311
	312	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	313
	314	for (i = 0; i < n; i++) {
	315	rational[0] = g_variant_new_uint64((*array)[i][0]);
	316	rational[1] = g_variant_new_uint64((*array)[i][1]);
	317
	318	/* FIXME: Valgrind reports a memory leak here. */
	319	g_variant_builder_add_value(&gvb, g_variant_new_tuple(rational, 2));
	320	}
	321
	322	return g_variant_builder_end(&gvb);
	323	}
	324
	325	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	326	const struct sr_channel_group *cg)
	327	{
	328	int ret, cg_type;
	329	unsigned int i, j;
	330	char command[MAX_COMMAND_SIZE], float_str[30];
	331	struct dev_context *devc;
	332	struct scope_config *model;
	333	struct scope_state *state;
	334	const char *tmp;
	335	uint64_t p, q;
	336	double tmp_d;
	337	gboolean update_sample_rate;
	338
	339	if (!sdi \|\| !(devc = sdi->priv))
	340	return SR_ERR_ARG;
	341
	342	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	343	return SR_ERR;
	344
	345	model = devc->model_config;
	346	state = devc->model_state;
	347	update_sample_rate = FALSE;
	348
	349	ret = SR_ERR_NA;
	350
	351	switch (key) {
	352	case SR_CONF_LIMIT_FRAMES:
	353	devc->frame_limit = g_variant_get_uint64(data);
	354	ret = SR_OK;
	355	break;
	356	case SR_CONF_TRIGGER_SOURCE:
	357	tmp = g_variant_get_string(data, NULL);
	358	for (i = 0; (*model->trigger_sources)[i]; i++) {
	359	if (g_strcmp0(tmp, (*model->trigger_sources)[i]) != 0)
	360	continue;
	361	state->trigger_source = i;
	362	g_snprintf(command, sizeof(command),
	363	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SOURCE],
	364	(*model->trigger_sources)[i]);
	365
	366	ret = sr_scpi_send(sdi->conn, command);
	367	break;
	368	}
	369	break;
	370	case SR_CONF_VDIV:
	371	if (cg_type == CG_NONE) {
	372	sr_err("No channel group specified.");
	373	return SR_ERR_CHANNEL_GROUP;
	374	}
	375
	376	g_variant_get(data, "(tt)", &p, &q);
	377
	378	for (i = 0; i < model->num_vdivs; i++) {
	379	if (p != (*model->vdivs)[i][0] \|\|
	380	q != (*model->vdivs)[i][1])
	381	continue;
	382	for (j = 1; j <= model->analog_channels; ++j) {
	383	if (cg != devc->analog_groups[j - 1])
	384	continue;
	385	state->analog_channels[j - 1].vdiv = i;
	386	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	387	g_snprintf(command, sizeof(command),
	388	(*model->scpi_dialect)[SCPI_CMD_SET_VERTICAL_DIV],
	389	j, float_str);
	390
	391	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	392	sr_scpi_get_opc(sdi->conn) != SR_OK)
	393	return SR_ERR;
	394
	395	break;
	396	}
	397
	398	ret = SR_OK;
	399	break;
	400	}
	401	break;
	402	case SR_CONF_TIMEBASE:
	403	g_variant_get(data, "(tt)", &p, &q);
	404
	405	for (i = 0; i < model->num_timebases; i++) {
	406	if (p != (*model->timebases)[i][0] \|\|
	407	q != (*model->timebases)[i][1])
	408	continue;
	409	state->timebase = i;
	410	g_ascii_formatd(float_str, sizeof(float_str), "%E", (float) p / q);
	411	g_snprintf(command, sizeof(command),
	412	(*model->scpi_dialect)[SCPI_CMD_SET_TIMEBASE],
	413	float_str);
	414
	415	ret = sr_scpi_send(sdi->conn, command);
	416	update_sample_rate = TRUE;
	417	break;
	418	}
	419	break;
	420	case SR_CONF_HORIZ_TRIGGERPOS:
	421	tmp_d = g_variant_get_double(data);
	422
	423	if (tmp_d < 0.0 \|\| tmp_d > 1.0)
	424	return SR_ERR;
	425
	426	state->horiz_triggerpos = tmp_d;
	427	tmp_d = -(tmp_d - 0.5) *
	428	((double) (*model->timebases)[state->timebase][0] /
	429	(*model->timebases)[state->timebase][1])
	430	* model->num_xdivs;
	431
	432	g_ascii_formatd(float_str, sizeof(float_str), "%E", tmp_d);
	433	g_snprintf(command, sizeof(command),
	434	(*model->scpi_dialect)[SCPI_CMD_SET_HORIZ_TRIGGERPOS],
	435	float_str);
	436
	437	ret = sr_scpi_send(sdi->conn, command);
	438	break;
	439	case SR_CONF_TRIGGER_SLOPE:
	440	tmp = g_variant_get_string(data, NULL);
	441
	442	if (!tmp \|\| !(tmp[0] == 'f' \|\| tmp[0] == 'r'))
	443	return SR_ERR_ARG;
	444
	445	state->trigger_slope = (tmp[0] == 'r') ? 0 : 1;
	446
	447	g_snprintf(command, sizeof(command),
	448	(*model->scpi_dialect)[SCPI_CMD_SET_TRIGGER_SLOPE],
	449	(state->trigger_slope == 0) ? "POS" : "NEG");
	450
	451	ret = sr_scpi_send(sdi->conn, command);
	452	break;
	453	case SR_CONF_COUPLING:
	454	if (cg_type == CG_NONE) {
	455	sr_err("No channel group specified.");
	456	return SR_ERR_CHANNEL_GROUP;
	457	}
	458
	459	tmp = g_variant_get_string(data, NULL);
	460
	461	for (i = 0; (*model->coupling_options)[i]; i++) {
	462	if (strcmp(tmp, (*model->coupling_options)[i]) != 0)
	463	continue;
	464	for (j = 1; j <= model->analog_channels; ++j) {
	465	if (cg != devc->analog_groups[j - 1])
	466	continue;
	467	state->analog_channels[j-1].coupling = i;
	468
	469	g_snprintf(command, sizeof(command),
	470	(*model->scpi_dialect)[SCPI_CMD_SET_COUPLING],
	471	j, tmp);
	472
	473	if (sr_scpi_send(sdi->conn, command) != SR_OK \|\|
	474	sr_scpi_get_opc(sdi->conn) != SR_OK)
	475	return SR_ERR;
	476	break;
	477	}
	478
	479	ret = SR_OK;
	480	break;
	481	}
	482	break;
	483	default:
	484	ret = SR_ERR_NA;
	485	break;
	486	}
	487
	488	if (ret == SR_OK)
	489	ret = sr_scpi_get_opc(sdi->conn);
	490
	491	if (ret == SR_OK && update_sample_rate)
	492	ret = hmo_update_sample_rate(sdi);
	493
	494	return ret;
	495	}
	496
	497	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	498	const struct sr_channel_group *cg)
	499	{
	500	int cg_type;
	501	struct dev_context *devc;
	502	struct scope_config *model;
	503
	504	if (!sdi \|\| !(devc = sdi->priv))
	505	return SR_ERR_ARG;
	506
	507	if ((cg_type = check_channel_group(devc, cg)) == CG_INVALID)
	508	return SR_ERR;
	509
	510	model = devc->model_config;
	511
	512	switch (key) {
	513	case SR_CONF_SCAN_OPTIONS:
	514	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	515	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	516	break;
	517	case SR_CONF_DEVICE_OPTIONS:
	518	if (cg_type == CG_NONE) {
	519	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	520	model->devopts, model->num_devopts,
	521	sizeof(uint32_t));
	522	} else if (cg_type == CG_ANALOG) {
	523	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	524	model->analog_devopts, model->num_analog_devopts,
	525	sizeof(uint32_t));
	526	} else {
	527	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	528	NULL, 0, sizeof(uint32_t));
	529	}
	530	break;
	531	case SR_CONF_COUPLING:
	532	if (cg_type == CG_NONE)
	533	return SR_ERR_CHANNEL_GROUP;
	534	data = g_variant_new_strv(model->coupling_options,
	535	g_strv_length((char *)model->coupling_options));
	536	break;
	537	case SR_CONF_TRIGGER_SOURCE:
	538	data = g_variant_new_strv(model->trigger_sources,
	539	g_strv_length((char *)model->trigger_sources));
	540	break;
	541	case SR_CONF_TRIGGER_SLOPE:
	542	data = g_variant_new_strv(model->trigger_slopes,
	543	g_strv_length((char *)model->trigger_slopes));
	544	break;
	545	case SR_CONF_TIMEBASE:
	546	*data = build_tuples(model->timebases, model->num_timebases);
	547	break;
	548	case SR_CONF_VDIV:
	549	if (cg_type == CG_NONE)
	550	return SR_ERR_CHANNEL_GROUP;
	551	*data = build_tuples(model->vdivs, model->num_vdivs);
	552	break;
	553	default:
	554	return SR_ERR_NA;
	555	}
	556
	557	return SR_OK;
	558	}
	559
	560	SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
	561	{
	562	char command[MAX_COMMAND_SIZE];
	563	struct sr_channel *ch;
	564	struct dev_context *devc;
	565	struct scope_config *model;
	566
	567	devc = sdi->priv;
	568	model = devc->model_config;
	569
	570	ch = devc->current_channel->data;
	571
	572	switch (ch->type) {
	573	case SR_CHANNEL_ANALOG:
	574	g_snprintf(command, sizeof(command),
	575	(*model->scpi_dialect)[SCPI_CMD_GET_ANALOG_DATA],
	576	ch->index + 1);
	577	break;
	578	case SR_CHANNEL_LOGIC:
	579	g_snprintf(command, sizeof(command),
	580	(*model->scpi_dialect)[SCPI_CMD_GET_DIG_DATA],
	581	ch->index < 8 ? 1 : 2);
	582	break;
	583	default:
	584	sr_err("Invalid channel type.");
	585	break;
	586	}
	587
	588	return sr_scpi_send(sdi->conn, command);
	589	}
	590
	591	static int hmo_check_channels(GSList *channels)
	592	{
	593	GSList *l;
	594	struct sr_channel *ch;
	595	gboolean enabled_pod1, enabled_pod2, enabled_chan3, enabled_chan4;
	596
	597	enabled_pod1 = enabled_pod2 = enabled_chan3 = enabled_chan4 = FALSE;
	598
	599	for (l = channels; l; l = l->next) {
	600	ch = l->data;
	601	switch (ch->type) {
	602	case SR_CHANNEL_ANALOG:
	603	if (ch->index == 2)
	604	enabled_chan3 = TRUE;
	605	else if (ch->index == 3)
	606	enabled_chan4 = TRUE;
	607	break;
	608	case SR_CHANNEL_LOGIC:
	609	if (ch->index < 8)
	610	enabled_pod1 = TRUE;
	611	else
	612	enabled_pod2 = TRUE;
	613	break;
	614	default:
	615	return SR_ERR;
	616	}
	617	}
	618
	619	if ((enabled_pod1 && enabled_chan3) \|\|
	620	(enabled_pod2 && enabled_chan4))
	621	return SR_ERR;
	622
	623	return SR_OK;
	624	}
	625
	626	static int hmo_setup_channels(const struct sr_dev_inst *sdi)
	627	{
	628	GSList *l;
	629	unsigned int i;
	630	gboolean *pod_enabled, setup_changed;
	631	char command[MAX_COMMAND_SIZE];
	632	struct scope_state *state;
	633	struct scope_config *model;
	634	struct sr_channel *ch;
	635	struct dev_context *devc;
	636	struct sr_scpi_dev_inst *scpi;
	637
	638	devc = sdi->priv;
	639	scpi = sdi->conn;
	640	state = devc->model_state;
	641	model = devc->model_config;
	642	setup_changed = FALSE;
	643
	644	pod_enabled = g_try_malloc0(sizeof(gboolean) * model->digital_pods);
	645
	646	for (l = sdi->channels; l; l = l->next) {
	647	ch = l->data;
	648	switch (ch->type) {
	649	case SR_CHANNEL_ANALOG:
	650	if (ch->enabled == state->analog_channels[ch->index].state)
	651	break;
	652	g_snprintf(command, sizeof(command),
	653	(*model->scpi_dialect)[SCPI_CMD_SET_ANALOG_CHAN_STATE],
	654	ch->index + 1, ch->enabled);
	655
	656	if (sr_scpi_send(scpi, command) != SR_OK)
	657	return SR_ERR;
	658	state->analog_channels[ch->index].state = ch->enabled;
	659	setup_changed = TRUE;
	660	break;
	661	case SR_CHANNEL_LOGIC:
	662	/*
	663	* A digital POD needs to be enabled for every group of
	664	* 8 channels.
	665	*/
	666	if (ch->enabled)
	667	pod_enabled[ch->index < 8 ? 0 : 1] = TRUE;
	668
	669	if (ch->enabled == state->digital_channels[ch->index])
	670	break;
	671	g_snprintf(command, sizeof(command),
	672	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_CHAN_STATE],
	673	ch->index, ch->enabled);
	674
	675	if (sr_scpi_send(scpi, command) != SR_OK)
	676	return SR_ERR;
	677
	678	state->digital_channels[ch->index] = ch->enabled;
	679	setup_changed = TRUE;
	680	break;
	681	default:
	682	return SR_ERR;
	683	}
	684	}
	685
	686	for (i = 1; i <= model->digital_pods; ++i) {
	687	if (state->digital_pods[i - 1] == pod_enabled[i - 1])
	688	continue;
	689	g_snprintf(command, sizeof(command),
	690	(*model->scpi_dialect)[SCPI_CMD_SET_DIG_POD_STATE],
	691	i, pod_enabled[i - 1]);
	692	if (sr_scpi_send(scpi, command) != SR_OK)
	693	return SR_ERR;
	694	state->digital_pods[i - 1] = pod_enabled[i - 1];
	695	setup_changed = TRUE;
	696	}
	697
	698	g_free(pod_enabled);
	699
	700	if (setup_changed && hmo_update_sample_rate(sdi) != SR_OK)
	701	return SR_ERR;
	702
	703	return SR_OK;
	704	}
	705
	706	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	707	{
	708	GSList *l;
	709	gboolean digital_added;
	710	struct sr_channel *ch;
	711	struct dev_context *devc;
	712	struct sr_scpi_dev_inst *scpi;
	713
	714	if (sdi->status != SR_ST_ACTIVE)
	715	return SR_ERR_DEV_CLOSED;
	716
	717	scpi = sdi->conn;
	718	devc = sdi->priv;
	719	digital_added = FALSE;
	720
	721	g_slist_free(devc->enabled_channels);
	722	devc->enabled_channels = NULL;
	723
	724	for (l = sdi->channels; l; l = l->next) {
	725	ch = l->data;
	726	if (!ch->enabled)
	727	continue;
	728	/* Only add a single digital channel. */
	729	if (ch->type != SR_CHANNEL_LOGIC \|\| !digital_added) {
	730	devc->enabled_channels = g_slist_append(
	731	devc->enabled_channels, ch);
	732	if (ch->type == SR_CHANNEL_LOGIC)
	733	digital_added = TRUE;
	734	}
	735	}
	736
	737	if (!devc->enabled_channels)
	738	return SR_ERR;
	739
	740	if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
	741	sr_err("Invalid channel configuration specified!");
	742	return SR_ERR_NA;
	743	}
	744
	745	if (hmo_setup_channels(sdi) != SR_OK) {
	746	sr_err("Failed to setup channel configuration!");
	747	return SR_ERR;
	748	}
	749
	750	sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
	751	hmo_receive_data, (void *)sdi);
	752
	753	/* Send header packet to the session bus. */
	754	std_session_send_df_header(cb_data, LOG_PREFIX);
	755
	756	devc->current_channel = devc->enabled_channels;
	757
	758	return hmo_request_data(sdi);
	759	}
	760
	761	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	762	{
	763	struct dev_context *devc;
	764	struct sr_scpi_dev_inst *scpi;
	765	struct sr_datafeed_packet packet;
	766
	767	(void)cb_data;
	768
	769	packet.type = SR_DF_END;
	770	packet.payload = NULL;
	771	sr_session_send(sdi, &packet);
	772
	773	if (sdi->status != SR_ST_ACTIVE)
	774	return SR_ERR_DEV_CLOSED;
	775
	776	devc = sdi->priv;
	777
	778	devc->num_frames = 0;
	779	g_slist_free(devc->enabled_channels);
	780	devc->enabled_channels = NULL;
	781	scpi = sdi->conn;
	782	sr_scpi_source_remove(sdi->session, scpi);
	783
	784	return SR_OK;
	785	}
	786
	787	SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
	788	.name = "hameg-hmo",
	789	.longname = "Hameg HMO",
	790	.api_version = 1,
	791	.init = init,
	792	.cleanup = cleanup,
	793	.scan = scan,
	794	.dev_list = dev_list,
	795	.dev_clear = dev_clear,
	796	.config_get = config_get,
	797	.config_set = config_set,
	798	.config_list = config_list,
	799	.dev_open = dev_open,
	800	.dev_close = dev_close,
	801	.dev_acquisition_start = dev_acquisition_start,
	802	.dev_acquisition_stop = dev_acquisition_stop,
	803	.priv = NULL,
	804	};