2 * This file is part of the libsigrok project.
4 * Copyright (C) 2015 Sergey Alirzaev <zl29ah@gmail.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 static void send_samples(struct sr_dev_inst *sdi, uint64_t samples_to_send)
26 struct sr_datafeed_packet packet;
27 struct sr_datafeed_logic logic;
28 struct dev_context *devc;
30 sr_spew("Sending %" PRIu64 " samples.", samples_to_send);
34 packet.type = SR_DF_LOGIC;
35 packet.payload = &logic;
36 logic.length = samples_to_send;
38 logic.data = devc->data_buf;
39 sr_session_send(sdi, &packet);
41 devc->samples_sent += samples_to_send;
42 devc->bytes_received -= samples_to_send;
45 SR_PRIV int ftdi_la_set_samplerate(struct dev_context *devc)
49 ret = ftdi_set_baudrate(devc->ftdic,
50 devc->cur_samplerate / devc->desc->samplerate_div);
52 sr_err("Failed to set baudrate (%d): %s.", devc->cur_samplerate,
53 ftdi_get_error_string(devc->ftdic));
59 SR_PRIV int ftdi_la_receive_data(int fd, int revents, void *cb_data)
61 struct sr_dev_inst *sdi;
62 struct dev_context *devc;
71 if (!(devc = sdi->priv))
73 if (!(revents == G_IO_IN || revents == 0))
78 /* Get a block of data. */
79 bytes_read = ftdi_read_data(devc->ftdic, devc->data_buf, DATA_BUF_SIZE);
81 sr_err("Failed to read FTDI data (%d): %s.",
82 bytes_read, ftdi_get_error_string(devc->ftdic));
83 sr_dev_acquisition_stop(sdi);
86 if (bytes_read == 0) {
87 sr_spew("Received 0 bytes, nothing to do.");
90 sr_spew("Got some data.");
91 devc->bytes_received += bytes_read;
93 n = devc->samples_sent + devc->bytes_received;
95 if (devc->limit_samples && (n >= devc->limit_samples)) {
96 send_samples(sdi, devc->limit_samples - devc->samples_sent);
97 sr_info("Requested number of samples reached.");
98 sr_dev_acquisition_stop(sdi);
101 send_samples(sdi, devc->bytes_received);