2 * This file is part of the libsigrok project.
4 * Copyright (C) 2012 Martin Ling <martin-git@earth.li>
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/>.
26 #include "libsigrok.h"
27 #include "libsigrok-internal.h"
30 SR_PRIV int rigol_ds1xx2_receive_data(int fd, int revents, void *cb_data)
32 struct sr_dev_inst *sdi;
33 struct dev_context *devc;
34 struct sr_datafeed_packet packet;
35 struct sr_datafeed_analog analog;
36 unsigned char buf[WAVEFORM_SIZE];
37 float data[WAVEFORM_SIZE];
43 if (!(devc = sdi->priv))
46 if (revents == G_IO_IN) {
47 len = read(fd, buf, WAVEFORM_SIZE);
48 sr_dbg("Received %d bytes.", len);
52 if (devc->num_frame_samples == 0) {
53 /* Start of a new frame. */
54 packet.type = SR_DF_FRAME_BEGIN;
55 sr_session_send(sdi, &packet);
58 for (i = 0; i < len; i++)
59 data[i] = devc->scale / 25.6 * (128 - buf[i]) - devc->offset;
60 analog.probes = devc->enabled_probes;
61 analog.num_samples = len;
63 analog.mq = SR_MQ_VOLTAGE;
64 analog.unit = SR_UNIT_VOLT;
66 packet.type = SR_DF_ANALOG;
67 packet.payload = &analog;
68 sr_session_send(cb_data, &packet);
70 if (len == WAVEFORM_SIZE) {
71 /* End of the frame. */
72 packet.type = SR_DF_FRAME_END;
73 sr_session_send(sdi, &packet);
75 if (++devc->num_frames == devc->limit_frames)
76 sdi->driver->dev_acquisition_stop(sdi, cb_data);
78 rigol_ds1xx2_send_data(fd, ":WAV:DATA?");
85 SR_PRIV int rigol_ds1xx2_send_data(int fd, const char *format, ...)
91 va_start(args, format);
92 len = vsprintf(buf, format, args);
96 out = write(fd, buf, len);
99 sr_dbg("Only sent %d/%d bytes of '%s'.", out, len, buf);
102 sr_dbg("Sent '%s'.", buf);