2 * This file is part of the libsigrok project.
4 * Copyright (C) 2012 Martin Ling <martin-git@earth.li>
5 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 #include "libsigrok.h"
29 #include "libsigrok-internal.h"
32 SR_PRIV int rigol_ds1xx2_receive(int fd, int revents, void *cb_data)
34 struct sr_dev_inst *sdi;
35 struct dev_context *devc;
36 struct sr_datafeed_packet packet;
37 struct sr_datafeed_analog analog;
38 unsigned char buf[WAVEFORM_SIZE];
40 float data[WAVEFORM_SIZE];
46 if (!(devc = sdi->priv))
49 if (revents == G_IO_IN) {
50 len = read(fd, buf, WAVEFORM_SIZE - devc->num_frame_bytes);
51 sr_dbg("Received %d bytes.", len);
55 if (devc->num_frame_bytes == 0) {
56 /* Start of a new frame. */
57 packet.type = SR_DF_FRAME_BEGIN;
58 sr_session_send(sdi, &packet);
61 probenum = devc->channel_frame->name[2] == '1' ? 0 : 1;
62 for (i = 0; i < len; i++) {
63 vdiv = devc->vdiv[probenum];
64 offset = devc->vert_offset[probenum];
65 data[i] = vdiv / 25.6 * (128 - buf[i]) - offset;
67 analog.probes = g_slist_append(NULL, devc->channel_frame);
68 analog.num_samples = len;
70 analog.mq = SR_MQ_VOLTAGE;
71 analog.unit = SR_UNIT_VOLT;
73 packet.type = SR_DF_ANALOG;
74 packet.payload = &analog;
75 sr_session_send(cb_data, &packet);
76 g_slist_free(analog.probes);
78 devc->num_frame_bytes += len;
80 if (devc->num_frame_bytes != WAVEFORM_SIZE) {
81 /* Don't have the whole frame yet. */
85 /* End of the frame. */
86 packet.type = SR_DF_FRAME_END;
87 sr_session_send(sdi, &packet);
88 devc->num_frame_bytes = 0;
90 if (devc->channel_frame == devc->enabled_probes->data
91 && devc->enabled_probes->next != NULL) {
92 /* We got the frame for the first channel, but
93 * there's a second channel. */
94 devc->channel_frame = devc->enabled_probes->next->data;
95 rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%c",
96 devc->channel_frame->name[2]);
98 /* Done with both channels in this frame. */
99 if (++devc->num_frames == devc->limit_frames) {
100 sdi->driver->dev_acquisition_stop(sdi, cb_data);
102 /* Get the next frame, starting with the first channel. */
103 devc->channel_frame = devc->enabled_probes->data;
104 rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%c",
105 devc->channel_frame->name[2]);
113 SR_PRIV int rigol_ds1xx2_send(struct dev_context *devc, const char *format, ...)
119 va_start(args, format);
120 len = vsnprintf(buf, 255, format, args);
124 out = write(devc->fd, buf, len);
127 sr_dbg("Only sent %d/%d bytes of '%s'.", out, len, buf);
130 sr_spew("Sent '%s'.", buf);
137 static int get_cfg(const struct sr_dev_inst *sdi, char *cmd, char *reply)
139 struct dev_context *devc;
144 if (rigol_ds1xx2_send(devc, cmd) != SR_OK)
147 if ((len = read(devc->fd, reply, 255)) < 0)
150 sr_spew("Received '%s'.", reply);
155 static int get_cfg_float(const struct sr_dev_inst *sdi, char *cmd, float *f)
159 if (get_cfg(sdi, cmd, buf) != SR_OK)
161 *f = strtof(buf, &e);
162 if (e == buf || (fpclassify(*f) & (FP_ZERO | FP_NORMAL)) == 0) {
163 sr_dbg("failed to parse response to '%s': '%s'", cmd, buf);
170 static int get_cfg_string(const struct sr_dev_inst *sdi, char *cmd, char **buf)
173 if (!(*buf = g_try_malloc0(256)))
174 return SR_ERR_MALLOC;
176 if (get_cfg(sdi, cmd, *buf) != SR_OK)
182 SR_PRIV int rigol_ds1xx2_get_dev_cfg(const struct sr_dev_inst *sdi)
184 struct dev_context *devc;
190 if (get_cfg_string(sdi, ":CHAN1:DISP?", &t_s) != SR_OK)
192 devc->channels[0] = !strcmp(t_s, "ON") ? TRUE : FALSE;
194 if (get_cfg_string(sdi, ":CHAN2:DISP?", &t_s) != SR_OK)
196 devc->channels[1] = !strcmp(t_s, "ON") ? TRUE : FALSE;
198 sr_dbg("Current channel state CH1 %s CH2 %s",
199 devc->channels[0] ? "on" : "off",
200 devc->channels[1] ? "on" : "off");
203 if (get_cfg_float(sdi, ":TIM:SCAL?", &devc->timebase) != SR_OK)
205 sr_dbg("Current timebase %f", devc->timebase);
208 if (get_cfg_float(sdi, ":CHAN1:SCAL?", &devc->vdiv[0]) != SR_OK)
210 if (get_cfg_float(sdi, ":CHAN2:SCAL?", &devc->vdiv[1]) != SR_OK)
212 sr_dbg("Current vertical gain CH1 %f CH2 %f", devc->vdiv[0], devc->vdiv[1]);
214 /* Vertical offset. */
215 if (get_cfg_float(sdi, ":CHAN1:OFFS?", &devc->vert_offset[0]) != SR_OK)
217 if (get_cfg_float(sdi, ":CHAN2:OFFS?", &devc->vert_offset[1]) != SR_OK)
219 sr_dbg("Current vertical offset CH1 %f CH2 %f", devc->vert_offset[0],
220 devc->vert_offset[1]);
223 if (get_cfg_string(sdi, ":CHAN1:COUP?", &devc->coupling[0]) != SR_OK)
225 if (get_cfg_string(sdi, ":CHAN2:COUP?", &devc->coupling[1]) != SR_OK)
227 sr_dbg("Current coupling CH1 %s CH2 %s", devc->coupling[0],
230 /* Trigger source. */
231 if (get_cfg_string(sdi, ":TRIG:EDGE:SOUR?", &devc->trigger_source) != SR_OK)
233 sr_dbg("Current trigger source %s", devc->trigger_source);
235 /* Horizontal trigger position. */
236 if (get_cfg_float(sdi, ":TIM:OFFS?", &devc->horiz_triggerpos) != SR_OK)
238 sr_dbg("Current horizontal trigger position %f", devc->horiz_triggerpos);
241 if (get_cfg_string(sdi, ":TRIG:EDGE:SLOP?", &devc->trigger_slope) != SR_OK)
243 sr_dbg("Current trigger slope %s", devc->trigger_slope);