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_start(const struct sr_dev_inst *sdi)
{
GSList *l;
gboolean digital_added[MAX_DIGITAL_GROUP_COUNT];
size_t group, pod_count;
struct sr_channel *ch;
struct dev_context *devc;
struct sr_scpi_dev_inst *scpi;
int ret;
scpi = sdi->conn;
devc = sdi->priv;
/* Preset empty results. */
for (group = 0; group < ARRAY_SIZE(digital_added); group++)
digital_added[group] = FALSE;
g_slist_free(devc->enabled_channels);
devc->enabled_channels = NULL;
/*
* Contruct the list of enabled channels. Determine the highest
* number of digital pods involved in the acquisition.
*/
pod_count = 0;
for (l = sdi->channels; l; l = l->next) {
ch = l->data;
if (!ch->enabled)
continue;
/* Only add a single digital channel per group (pod). */
group = ch->index / 8;
if (ch->type != SR_CHANNEL_LOGIC || !digital_added[group]) {
devc->enabled_channels = g_slist_append(
devc->enabled_channels, ch);
if (ch->type == SR_CHANNEL_LOGIC) {
digital_added[group] = TRUE;
if (pod_count < group + 1)
pod_count = group + 1;
}
}
}
if (!devc->enabled_channels)
return SR_ERR;
devc->pod_count = pod_count;
devc->logic_data = NULL;
/*
* Check constraints. Some channels can be either analog or
* digital, but not both at the same time.
*/
if (hmo_check_channels(devc->enabled_channels) != SR_OK) {
sr_err("Invalid channel configuration specified!");
ret = SR_ERR_NA;
goto free_enabled;
}
/*
* Configure the analog and digital channels and the
* corresponding digital pods.
*/
if (hmo_setup_channels(sdi) != SR_OK) {
sr_err("Failed to setup channel configuration!");
ret = SR_ERR;
goto free_enabled;
}
/*
* Start acquisition on the first enabled channel. The
* receive routine will continue driving the acquisition.
*/
sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 50,
hmo_receive_data, (void *)sdi);
std_session_send_df_header(sdi);
devc->current_channel = devc->enabled_channels;
return hmo_request_data(sdi);
free_enabled:
g_slist_free(devc->enabled_channels);
devc->enabled_channels = NULL;
return ret;
}
