return SR_OK;
}
+static void send_chunk(struct sr_dev_inst *sdi,
+ const uint8_t *packets, unsigned int num_tfers)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_logic logic;
+ struct sr_datafeed_packet sr_packet;
+ unsigned int max_samples, n_samples, total_samples, free_n_samples;
+ unsigned int i, j, k;
+ int do_signal_trigger;
+ uint16_t *wp;
+ const uint8_t *rp;
+ uint16_t state;
+ uint8_t repetitions;
+
+ devc = sdi->priv;
+
+ logic.unitsize = 2;
+ logic.data = devc->convbuffer;
+
+ sr_packet.type = SR_DF_LOGIC;
+ sr_packet.payload = &logic;
+
+ max_samples = devc->convbuffer_size / 2;
+ n_samples = 0;
+ wp = (uint16_t *)devc->convbuffer;
+ total_samples = 0;
+ do_signal_trigger = 0;
+
+ if (devc->had_triggers_configured && devc->reading_behind_trigger == 0 && devc->info.n_rep_packets_before_trigger == 0) {
+ std_session_send_df_trigger(sdi);
+ devc->reading_behind_trigger = 1;
+ }
+
+ rp = packets;
+ for (i = 0; i < num_tfers; i++) {
+ for (k = 0; k < NUM_PACKETS_IN_CHUNK; k++) {
+ free_n_samples = max_samples - n_samples;
+ if (free_n_samples < 256 || do_signal_trigger) {
+ logic.length = n_samples * 2;
+ sr_session_send(sdi, &sr_packet);
+ n_samples = 0;
+ wp = (uint16_t *)devc->convbuffer;
+ if (do_signal_trigger) {
+ std_session_send_df_trigger(sdi);
+ do_signal_trigger = 0;
+ }
+ }
+
+ state = read_u16le_inc(&rp);
+ repetitions = read_u8_inc(&rp);
+ for (j = 0; j < repetitions; j++)
+ *wp++ = state;
+
+ n_samples += repetitions;
+ total_samples += repetitions;
+ devc->total_samples += repetitions;
+ if (!devc->reading_behind_trigger) {
+ devc->n_reps_until_trigger--;
+ if (devc->n_reps_until_trigger == 0) {
+ devc->reading_behind_trigger = 1;
+ do_signal_trigger = 1;
+ sr_dbg(" here is trigger position after %" PRIu64 " samples, %.6fms",
+ devc->total_samples,
+ (double)devc->total_samples / devc->cur_samplerate * 1e3);
+ }
+ }
+ }
+ (void)read_u8_inc(&rp); /* Skip sequence number. */
+ }
+ if (n_samples) {
+ logic.length = n_samples * 2;
+ sr_session_send(sdi, &sr_packet);
+ if (do_signal_trigger) {
+ std_session_send_df_trigger(sdi);
+ }
+ }
+ sr_dbg("send_chunk done after %d samples", total_samples);
+}
+
+static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct sr_usb_dev_inst *usb;
+ int ret;
+
+ sdi = transfer->user_data;
+ devc = sdi->priv;
+ usb = sdi->conn;
+
+ sr_dbg("receive_transfer(): status %s received %d bytes.",
+ libusb_error_name(transfer->status), transfer->actual_length);
+
+ if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
+ sr_err("bulk transfer timeout!");
+ devc->transfer_finished = 1;
+ }
+ send_chunk(sdi, transfer->buffer, transfer->actual_length / TRANSFER_PACKET_LENGTH);
+
+ devc->n_bytes_to_read -= transfer->actual_length;
+ if (devc->n_bytes_to_read) {
+ uint32_t to_read = devc->n_bytes_to_read;
+ /* determine read size for the next usb transfer */
+ if (to_read >= LA2016_USB_BUFSZ)
+ to_read = LA2016_USB_BUFSZ;
+ else /* last transfer, make read size some multiple of LA2016_EP6_PKTSZ */
+ to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
+ libusb_fill_bulk_transfer(
+ transfer, usb->devhdl,
+ 0x86, transfer->buffer, to_read,
+ receive_transfer, (void *)sdi, DEFAULT_TIMEOUT_MS);
+
+ if ((ret = libusb_submit_transfer(transfer)) == 0)
+ return;
+ sr_err("Failed to submit further transfer: %s.", libusb_error_name(ret));
+ }
+
+ g_free(transfer->buffer);
+ libusb_free_transfer(transfer);
+ devc->transfer_finished = 1;
+}
+
+SR_PRIV int la2016_receive_data(int fd, int revents, void *cb_data)
+{
+ const struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct drv_context *drvc;
+ struct timeval tv;
+
+ (void)fd;
+ (void)revents;
+
+ sdi = cb_data;
+ devc = sdi->priv;
+ drvc = sdi->driver->context;
+
+ if (devc->have_trigger == 0) {
+ if (la2016_has_triggered(sdi) == 0) {
+ /* not yet ready for download */
+ return TRUE;
+ }
+ devc->have_trigger = 1;
+ devc->transfer_finished = 0;
+ devc->reading_behind_trigger = 0;
+ devc->total_samples = 0;
+ /* we can start retrieving data! */
+ if (la2016_start_retrieval(sdi, receive_transfer) != SR_OK) {
+ sr_err("failed to start retrieval!");
+ return FALSE;
+ }
+ sr_dbg("retrieval is started...");
+ std_session_send_df_frame_begin(sdi);
+
+ return TRUE;
+ }
+
+ tv.tv_sec = tv.tv_usec = 0;
+ libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
+
+ if (devc->transfer_finished) {
+ sr_dbg("transfer is finished!");
+ std_session_send_df_frame_end(sdi);
+
+ usb_source_remove(sdi->session, drvc->sr_ctx);
+ std_session_send_df_end(sdi);
+
+ la2016_stop_acquisition(sdi);
+
+ g_free(devc->convbuffer);
+ devc->convbuffer = NULL;
+
+ devc->transfer = NULL;
+
+ sr_dbg("transfer is now finished");
+ }
+
+ return TRUE;
+}
+
SR_PRIV int la2016_init_device(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
projects / libsigrok.git / blobdiff