X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fhameg-hmo%2Fapi.c;h=b5b3bc29f0100dc588c53d3091d6031b3b2d2688;hb=5a7e62211c4714ea2aac35baac10cf448373d4f5;hp=8f76e65a8d29644e65bf91a16bdd12860ecb5a4d;hpb=06a3e78adb41974ed759b39812ba1f83fd21a5aa;p=libsigrok.git

diff --git a/hardware/hameg-hmo/api.c b/hardware/hameg-hmo/api.c
index 8f76e65a..b5b3bc29 100644
--- a/hardware/hameg-hmo/api.c
+++ b/hardware/hameg-hmo/api.c
@@ -17,31 +17,103 @@
  * 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 int32_t hwopts[] = {
+	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 GSList *scan(GSList *options)
+static int check_manufacturer(const char *manufacturer)
 {
-	struct drv_context *drvc;
-	GSList *devices;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(manufacturers); ++i)
+		if (!strcmp(manufacturer, manufacturers[i]))
+			return SR_OK;
 
-	(void)options;
+	return SR_ERR;
+}
 
-	devices = NULL;
-	drvc = di->priv;
-	drvc->instances = NULL;
+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;
+	}
 
-	/* TODO: scan for devices, either based on a SR_CONF_CONN option
-	 * or on a USB scan. */
+	if (check_manufacturer(hw_info->manufacturer) != SR_OK)
+		goto fail;
 
-	return devices;
+	if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
+				    hw_info->manufacturer, hw_info->model,
+				    hw_info->firmware_version))) {
+		goto fail;
+	}
+	sr_scpi_hw_info_free(hw_info);
+	hw_info = NULL;
+
+	if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
+		goto fail;
+
+	sdi->driver = di;
+	sdi->priv = devc;
+	sdi->inst_type = SR_INST_SCPI;
+	sdi->conn = scpi;
+
+	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)
@@ -49,16 +121,43 @@ static GSList *dev_list(void)
 	return ((struct drv_context *)(di->priv))->instances;
 }
 
+static void clear_helper(void *priv)
+{
+	unsigned int i;
+	struct dev_context *devc;
+	struct scope_config *model;
+
+	devc = priv;
+	model = devc->model_config;
+
+	hmo_scope_state_free(devc->model_state);
+
+	for (i = 0; i < model->analog_channels; ++i)
+		g_slist_free(devc->analog_groups[i].channels);
+
+	for (i = 0; i < model->digital_pods; ++i) {
+		g_slist_free(devc->digital_groups[i].channels);
+		g_free(devc->digital_groups[i].name);
+	}
+
+	g_free(devc->analog_groups);
+	g_free(devc->digital_groups);
+
+	g_free(devc);
+}
+
 static int dev_clear(void)
 {
-	return std_dev_clear(di, NULL);
+	return std_dev_clear(di, clear_helper);
 }
 
 static int dev_open(struct sr_dev_inst *sdi)
 {
-	(void)sdi;
+	if (sdi->status != SR_ST_ACTIVE && sr_scpi_open(sdi->conn) != SR_OK)
+		return SR_ERR;
 
-	/* TODO: get handle from sdi->conn and open it. */
+	if (hmo_scope_state_get(sdi) != SR_OK)
+		return SR_ERR;
 
 	sdi->status = SR_ST_ACTIVE;
 
@@ -67,9 +166,10 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	(void)sdi;
+	if (sdi->status == SR_ST_INACTIVE)
+		return SR_OK;
 
-	/* TODO: get handle from sdi->conn and close it. */
+	sr_scpi_close(sdi->conn);
 
 	sdi->status = SR_ST_INACTIVE;
 
@@ -80,94 +180,614 @@ static int cleanup(void)
 {
 	dev_clear();
 
-	/* TODO: free other driver resources, if any. */
-
 	return SR_OK;
 }
 
-static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
+static int check_channel_group(struct dev_context *devc,
+			     const struct sr_channel_group *cg)
 {
-	int ret;
+	unsigned int i;
+	struct scope_config *model;
+
+	model = devc->model_config;
+
+	if (!cg)
+		return CG_NONE;
 
-	(void)sdi;
-	(void)data;
+	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(int 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;
 
-	ret = SR_OK;
 	switch (key) {
-	/* TODO */
+	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:
-		return SR_ERR_NA;
+		ret = SR_ERR_NA;
 	}
 
 	return ret;
 }
 
-static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
+static GVariant *build_tuples(const uint64_t (*array)[][2], unsigned int n)
 {
-	int ret;
+	unsigned int i;
+	GVariant *rational[2];
+	GVariantBuilder gvb;
 
-	(void)data;
+	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 
-	if (sdi->status != SR_ST_ACTIVE)
-		return SR_ERR_DEV_CLOSED;
+	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(int 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;
 
-	ret = SR_OK;
 	switch (key) {
-	/* TODO */
+	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(int key, GVariant **data, const struct sr_dev_inst *sdi)
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
+		       const struct sr_channel_group *cg)
 {
-	int ret;
+	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;
 
-	(void)sdi;
-	(void)data;
+	model = devc->model_config;
 
-	ret = SR_OK;
 	switch (key) {
-	/* TODO */
+	case SR_CONF_DEVICE_OPTIONS:
+		if (cg_type == CG_NONE) {
+			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				model->hw_caps, model->num_hwcaps,
+				sizeof(int32_t));
+		} else if (cg_type == CG_ANALOG) {
+			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				model->analog_hwcaps, model->num_analog_hwcaps,
+				sizeof(int32_t));
+		} else {
+			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				NULL, 0, sizeof(int32_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 ret;
+	return SR_OK;
 }
 
-static int dev_acquisition_start(const struct sr_dev_inst *sdi,
-				    void *cb_data)
+SR_PRIV int hmo_request_data(const struct sr_dev_inst *sdi)
 {
-	(void)sdi;
-	(void)cb_data;
+	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;
 
-	/* TODO: configure hardware, reset acquisition state, set up
-	 * callbacks and send header packet. */
+	scpi = sdi->conn;
+	devc = sdi->priv;
+	digital_added = FALSE;
+
+	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;
+		}
+	}
 
-	return SR_OK;
+	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(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;
 
-	/* TODO: stop acquisition. */
+	devc = sdi->priv;
+
+	devc->num_frames = 0;
+	g_slist_free(devc->enabled_channels);
+	devc->enabled_channels = NULL;
+	scpi = sdi->conn;
+	sr_scpi_source_remove(scpi);
 
 	return SR_OK;
 }
 
 SR_PRIV struct sr_dev_driver hameg_hmo_driver_info = {
 	.name = "hameg-hmo",
-	.longname = "Hameg HMO scope driver",
+	.longname = "Hameg HMO",
 	.api_version = 1,
 	.init = init,
 	.cleanup = cleanup,