sr_info("Current samplerate: %s", tmp);
g_free(tmp);
+ sr_info("Current samples per acquisition (i.e. frame): %d",
+ state->samples_per_frame);
+
sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)",
(*config->trigger_sources)[state->trigger_source],
(*config->trigger_slopes)[state->trigger_slope],
state->trigger_slope = i;
+ if (dlm_acq_length_get(sdi->conn, &state->samples_per_frame) != SR_OK) {
+ sr_err("Failed to query acquisition length.");
+ return SR_ERR;
+ }
+
dlm_sample_rate_query(sdi);
scope_state_dump(config, state);
return SR_OK;
}
-/**
- * Send an SCPI command, read the reply and store the result in scpi_response
- * without performing any processing on it.
- *
- * @param scpi Previously initialised SCPI device structure.
- * @param command The SCPI command to send to the device (can be NULL).
- * @param scpi_response Pointer where to store the parsed result.
- *
- * @return SR_OK on success, SR_ERR on failure.
- */
-static int dlm_scpi_get_raw(struct sr_scpi_dev_inst *scpi,
- const char *command, GArray **scpi_response)
+SR_PRIV int dlm_channel_data_request(const struct sr_dev_inst *sdi)
{
- char buf[256];
- int len;
-
- if (command)
- if (sr_scpi_send(scpi, command) != SR_OK)
- return SR_ERR;
-
- if (sr_scpi_read_begin(scpi) != SR_OK)
- return SR_ERR;
+ struct dev_context *devc;
+ struct sr_channel *ch;
+ int result;
- *scpi_response = g_array_new(FALSE, FALSE, sizeof(uint8_t));
+ devc = sdi->priv;
+ ch = devc->current_channel->data;
- while (!sr_scpi_read_complete(scpi)) {
- len = sr_scpi_read_data(scpi, buf, sizeof(buf));
- if (len < 0) {
- g_array_free(*scpi_response, TRUE);
- *scpi_response = NULL;
- return SR_ERR;
- }
- g_array_append_vals(*scpi_response, buf, len);
+ switch (ch->type) {
+ case SR_CHANNEL_ANALOG:
+ result = dlm_analog_data_get(sdi->conn, ch->index + 1);
+ break;
+ case SR_CHANNEL_LOGIC:
+ result = dlm_digital_data_get(sdi->conn);
+ break;
+ default:
+ sr_err("Invalid channel type encountered (%d).",
+ ch->type);
+ result = SR_ERR;
}
- return SR_OK;
+ if (result == SR_OK)
+ devc->data_pending = TRUE;
+ else
+ devc->data_pending = FALSE;
+
+ return result;
}
/**
* Turns raw sample data into voltages and sends them off to the session bus.
*
* @param data The raw sample data.
- * @samples Number of samples that were acquired.
* @ch_state Pointer to the state of the channel whose data we're processing.
* @sdi The device instance.
*
* @return SR_ERR when data is trucated, SR_OK otherwise.
*/
-static int dlm_analog_samples_send(GArray *data, int samples,
+static int dlm_analog_samples_send(GArray *data,
struct analog_channel_state *ch_state,
struct sr_dev_inst *sdi)
{
- int i;
+ uint32_t i, samples;
float voltage, range, offset;
GArray *float_data;
struct dev_context *devc;
+ struct scope_state *model_state;
struct sr_channel *ch;
struct sr_datafeed_analog analog;
struct sr_datafeed_packet packet;
+ devc = sdi->priv;
+ model_state = devc->model_state;
+ samples = model_state->samples_per_frame;
+ ch = devc->current_channel->data;
+
if (data->len < samples * sizeof(uint8_t)) {
sr_err("Truncated waveform data packet received.");
return SR_ERR;
}
- devc = sdi->priv;
- ch = devc->current_channel->data;
-
range = ch_state->waveform_range;
offset = ch_state->waveform_offset;
* Sends logic sample data off to the session bus.
*
* @param data The raw sample data.
- * @samples Number of samples that were acquired.
* @ch_state Pointer to the state of the channel whose data we're processing.
* @sdi The device instance.
*
* @return SR_ERR when data is trucated, SR_OK otherwise.
*/
-static int dlm_digital_samples_send(GArray *data, int samples,
+static int dlm_digital_samples_send(GArray *data,
struct sr_dev_inst *sdi)
{
+ struct dev_context *devc;
+ struct scope_state *model_state;
+ uint32_t samples;
struct sr_datafeed_logic logic;
struct sr_datafeed_packet packet;
+ devc = sdi->priv;
+ model_state = devc->model_state;
+ samples = model_state->samples_per_frame;
+
if (data->len < samples * sizeof(uint8_t)) {
sr_err("Truncated waveform data packet received.");
return SR_ERR;
*/
SR_PRIV int dlm_data_receive(int fd, int revents, void *cb_data)
{
- struct sr_channel *ch;
struct sr_dev_inst *sdi;
struct scope_state *model_state;
struct dev_context *devc;
+ struct sr_channel *ch;
struct sr_datafeed_packet packet;
- GArray *data;
- int result, num_bytes, samples;
+ int chunk_len, num_bytes;
+ static GArray *data = NULL;
(void)fd;
(void)revents;
if (!(model_state = (struct scope_state*)devc->model_state))
return FALSE;
- if (dlm_acq_length_get(sdi->conn, &samples) != SR_OK) {
- sr_err("Failed to query acquisition length.");
+ /* Are we waiting for a response from the device? */
+ if (!devc->data_pending)
return TRUE;
+
+ /* Check if a new query response is coming our way. */
+ if (!data) {
+ if (sr_scpi_read_begin(sdi->conn) == SR_OK)
+ /* The 16 here accounts for the header and EOL. */
+ data = g_array_sized_new(FALSE, FALSE, sizeof(uint8_t),
+ 16 + model_state->samples_per_frame);
+ else
+ return TRUE;
}
- packet.type = SR_DF_FRAME_BEGIN;
- sr_session_send(sdi, &packet);
+ /* Store incoming data. */
+ chunk_len = sr_scpi_read_data(sdi->conn, devc->receive_buffer,
+ RECEIVE_BUFFER_SIZE);
+ if (chunk_len < 0) {
+ sr_err("Error while reading data: %d", chunk_len);
+ goto fail;
+ }
+ g_array_append_vals(data, devc->receive_buffer, chunk_len);
- /* Request data for all active channels. */
- for (devc->current_channel = devc->enabled_channels;
- devc->current_channel;
- devc->current_channel = devc->current_channel->next) {
- ch = devc->current_channel->data;
+ /* Read the entire query response before processing. */
+ if (!sr_scpi_read_complete(sdi->conn))
+ return TRUE;
- switch (ch->type) {
- case SR_CHANNEL_ANALOG:
- result = dlm_analog_data_get(sdi->conn, ch->index + 1);
- break;
- case SR_CHANNEL_LOGIC:
- result = dlm_digital_data_get(sdi->conn);
- break;
- default:
- sr_err("Invalid channel type encountered (%d).",
- ch->type);
- continue;
- }
+ /* We finished reading and are no longer waiting for data. */
+ devc->data_pending = FALSE;
- if (result != SR_OK) {
- sr_err("Failed to query aquisition data.");
- goto fail;
- }
+ /* Signal the beginning of a new frame if this is the first channel. */
+ if (devc->current_channel == devc->enabled_channels) {
+ packet.type = SR_DF_FRAME_BEGIN;
+ sr_session_send(sdi, &packet);
+ }
- data = NULL;
- if (dlm_scpi_get_raw(sdi->conn, NULL, &data) != SR_OK) {
- sr_err("Failed to receive waveform data from device.");
- goto fail;
- }
+ if (dlm_block_data_header_process(data, &num_bytes) != SR_OK) {
+ sr_err("Encountered malformed block data header.");
+ goto fail;
+ }
- if (dlm_block_data_header_process(data, &num_bytes) != SR_OK) {
- sr_err("Encountered malformed block data header.");
- goto fail;
- }
+ if (num_bytes == 0) {
+ sr_warn("Zero-length waveform data packet received. " \
+ "Live mode not supported yet, stopping " \
+ "acquisition and retrying.");
+ /* Don't care about return value here. */
+ dlm_acquisition_stop(sdi->conn);
+ g_array_free(data, TRUE);
+ return TRUE;
+ }
- if (num_bytes == 0) {
- sr_warn("Zero-length waveform data packet received. " \
- "Live mode not supported yet, stopping " \
- "acquisition and retrying.");
- /* Don't care about return value here. */
- dlm_acquisition_stop(sdi->conn);
+ ch = devc->current_channel->data;
+ switch (ch->type) {
+ case SR_CHANNEL_ANALOG:
+ if (dlm_analog_samples_send(data,
+ &model_state->analog_states[ch->index],
+ sdi) != SR_OK)
goto fail;
- }
-
- switch (ch->type) {
- case SR_CHANNEL_ANALOG:
- if (dlm_analog_samples_send(data, samples,
- &model_state->analog_states[ch->index],
- sdi) != SR_OK)
- goto fail;
- break;
+ break;
+ case SR_CHANNEL_LOGIC:
+ if (dlm_digital_samples_send(data, sdi) != SR_OK)
+ goto fail;
+ break;
+ default:
+ sr_err("Invalid channel type encountered.");
+ break;
+ }
- case SR_CHANNEL_LOGIC:
- if (dlm_digital_samples_send(data, samples,
- sdi) != SR_OK)
- goto fail;
- break;
+ g_array_free(data, TRUE);
+ data = NULL;
- default:
- sr_err("Invalid channel type encountered.");
- break;
- }
+ /* Signal the end of this frame if this was the last enabled channel
+ * and set the next enabled channel. Then, request its data.
+ */
+ if (!devc->current_channel->next) {
+ packet.type = SR_DF_FRAME_END;
+ sr_session_send(sdi, &packet);
+ devc->current_channel = devc->enabled_channels;
+
+ /* As of now we only support importing the current acquisition
+ * data so we're going to stop at this point.
+ */
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+ return TRUE;
+ } else
+ devc->current_channel = devc->current_channel->next;
- g_array_free(data, TRUE);
+ if (dlm_channel_data_request(sdi) != SR_OK) {
+ sr_err("Failed to request aquisition data.");
+ goto fail;
}
- packet.type = SR_DF_FRAME_END;
- sr_session_send(sdi, &packet);
-
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
-
return TRUE;
fail:
- if (data)
+ if (data) {
g_array_free(data, TRUE);
+ data = NULL;
+ }
- return TRUE;
+ return FALSE;
}
projects / libsigrok.git / commitdiff