static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
GHashTableIter iter;
void *value;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
devc = sdi->priv;
devc->sent_samples = 0;
g_hash_table_iter_init(&iter, devc->ch_ag);
while (g_hash_table_iter_next(&iter, NULL, &value))
generate_analog_pattern(value, devc->cur_samplerate);
sr_session_source_add(sdi->session, -1, 0, 100,
prepare_data, (struct sr_dev_inst *)sdi);
std_session_send_df_header(sdi);
/* We use this timestamp to decide how many more samples to send. */
devc->start_us = g_get_monotonic_time();
devc->spent_us = 0;
return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
GSList *l;
struct dev_context *devc;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
devc = sdi->priv;
if (devc->limit_samples == 0)
return SR_ERR;
devc->logic_counter = devc->analog_counter = 0;
/*
* Setting two channels connected by a pipe is a remnant from when the
* demo driver generated data in a thread, and collected and sent the
* data in the main program loop.
* They are kept here because it provides a convenient way of setting
* up a timeout-based polling mechanism.
*/
if (pipe(devc->pipe_fds)) {
sr_err("%s: pipe() failed", __func__);
return SR_ERR;
}
for (l = devc->analog_channel_groups; l; l = l->next) {
generate_analog_pattern(l->data, devc->cur_samplerate);
}
devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]);
g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
/* Set channel encoding to binary (default is UTF-8). */
g_io_channel_set_encoding(devc->channel, NULL, NULL);
/* Make channels to unbuffered. */
g_io_channel_set_buffered(devc->channel, FALSE);
sr_session_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR,
40, prepare_data, (void *)sdi);
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
/* We use this timestamp to decide how many more samples to send. */
devc->starttime = g_get_monotonic_time();
return SR_OK;
}
