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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Martin Ling <martin-git@earth.li> | |
5 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
6 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
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/>. | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <stdarg.h> | |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <math.h> | |
27 | #include <glib.h> | |
28 | #include "libsigrok.h" | |
29 | #include "libsigrok-internal.h" | |
30 | #include "protocol.h" | |
31 | ||
32 | SR_PRIV int rigol_ds1xx2_receive(int fd, int revents, void *cb_data) | |
33 | { | |
34 | struct sr_dev_inst *sdi; | |
35 | struct dev_context *devc; | |
36 | struct sr_datafeed_packet packet; | |
37 | struct sr_datafeed_analog analog; | |
38 | struct sr_datafeed_logic logic; | |
39 | unsigned char buf[DIGITAL_WAVEFORM_SIZE]; | |
40 | double vdiv, offset; | |
41 | float data[ANALOG_WAVEFORM_SIZE]; | |
42 | int len, i, waveform_size; | |
43 | struct sr_probe *probe; | |
44 | ||
45 | if (!(sdi = cb_data)) | |
46 | return TRUE; | |
47 | ||
48 | if (!(devc = sdi->priv)) | |
49 | return TRUE; | |
50 | ||
51 | if (revents == G_IO_IN) { | |
52 | probe = devc->channel_frame; | |
53 | waveform_size = probe->type == SR_PROBE_ANALOG ? | |
54 | ANALOG_WAVEFORM_SIZE : DIGITAL_WAVEFORM_SIZE; | |
55 | len = read(fd, buf, waveform_size - devc->num_frame_bytes); | |
56 | sr_dbg("Received %d bytes.", len); | |
57 | if (len == -1) | |
58 | return TRUE; | |
59 | ||
60 | if (devc->num_frame_bytes == 0) { | |
61 | /* Start of a new frame. */ | |
62 | packet.type = SR_DF_FRAME_BEGIN; | |
63 | sr_session_send(sdi, &packet); | |
64 | } | |
65 | ||
66 | if (probe->type == SR_PROBE_ANALOG) { | |
67 | for (i = 0; i < len; i++) { | |
68 | vdiv = devc->vdiv[probe->index]; | |
69 | offset = devc->vert_offset[probe->index]; | |
70 | data[i] = vdiv / 25.6 * (128 - buf[i]) - offset; | |
71 | } | |
72 | analog.probes = g_slist_append(NULL, probe); | |
73 | analog.num_samples = len; | |
74 | analog.data = data; | |
75 | analog.mq = SR_MQ_VOLTAGE; | |
76 | analog.unit = SR_UNIT_VOLT; | |
77 | analog.mqflags = 0; | |
78 | packet.type = SR_DF_ANALOG; | |
79 | packet.payload = &analog; | |
80 | sr_session_send(cb_data, &packet); | |
81 | g_slist_free(analog.probes); | |
82 | ||
83 | if (len != ANALOG_WAVEFORM_SIZE) | |
84 | /* Don't have the whole frame yet. */ | |
85 | return TRUE; | |
86 | } else { | |
87 | logic.length = len - 10; | |
88 | logic.unitsize = 2; | |
89 | logic.data = buf + 10; | |
90 | packet.type = SR_DF_LOGIC; | |
91 | packet.payload = &logic; | |
92 | sr_session_send(cb_data, &packet); | |
93 | ||
94 | if (len != DIGITAL_WAVEFORM_SIZE) | |
95 | /* Don't have the whole frame yet. */ | |
96 | return TRUE; | |
97 | } | |
98 | ||
99 | /* End of the frame. */ | |
100 | packet.type = SR_DF_FRAME_END; | |
101 | sr_session_send(sdi, &packet); | |
102 | devc->num_frame_bytes = 0; | |
103 | ||
104 | if (devc->enabled_analog_probes | |
105 | && devc->channel_frame == devc->enabled_analog_probes->data | |
106 | && devc->enabled_analog_probes->next != NULL) { | |
107 | /* We got the frame for the first analog channel, but | |
108 | * there's a second analog channel. */ | |
109 | devc->channel_frame = devc->enabled_analog_probes->next->data; | |
110 | rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%c", | |
111 | devc->channel_frame->name[2]); | |
112 | } else { | |
113 | /* Done with both analog channels in this frame. */ | |
114 | if (devc->enabled_digital_probes | |
115 | && devc->channel_frame != devc->enabled_digital_probes->data) { | |
116 | /* Now we need to get the digital data. */ | |
117 | devc->channel_frame = devc->enabled_digital_probes->data; | |
118 | rigol_ds1xx2_send(devc, ":WAV:DATA? DIG"); | |
119 | } else if (++devc->num_frames == devc->limit_frames) { | |
120 | /* End of last frame. */ | |
121 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
122 | } else { | |
123 | /* Get the next frame, starting with the first analog channel. */ | |
124 | if (devc->enabled_analog_probes) { | |
125 | devc->channel_frame = devc->enabled_analog_probes->data; | |
126 | rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%c", | |
127 | devc->channel_frame->name[2]); | |
128 | } else { | |
129 | devc->channel_frame = devc->enabled_digital_probes->data; | |
130 | rigol_ds1xx2_send(devc, ":WAV:DATA? DIG"); | |
131 | } | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
136 | return TRUE; | |
137 | } | |
138 | ||
139 | SR_PRIV int rigol_ds1xx2_send(struct dev_context *devc, const char *format, ...) | |
140 | { | |
141 | va_list args; | |
142 | char buf[256]; | |
143 | int len, out, ret; | |
144 | ||
145 | va_start(args, format); | |
146 | len = vsnprintf(buf, 255, format, args); | |
147 | va_end(args); | |
148 | strcat(buf, "\n"); | |
149 | len++; | |
150 | out = write(devc->fd, buf, len); | |
151 | buf[len - 1] = '\0'; | |
152 | if (out != len) { | |
153 | sr_dbg("Only sent %d/%d bytes of '%s'.", out, len, buf); | |
154 | ret = SR_ERR; | |
155 | } else { | |
156 | sr_spew("Sent '%s'.", buf); | |
157 | ret = SR_OK; | |
158 | } | |
159 | ||
160 | return ret; | |
161 | } | |
162 | ||
163 | static int get_cfg(const struct sr_dev_inst *sdi, char *cmd, char *reply) | |
164 | { | |
165 | struct dev_context *devc; | |
166 | int len; | |
167 | ||
168 | devc = sdi->priv; | |
169 | ||
170 | if (rigol_ds1xx2_send(devc, cmd) != SR_OK) | |
171 | return SR_ERR; | |
172 | ||
173 | if ((len = read(devc->fd, reply, 255)) < 0) | |
174 | return SR_ERR; | |
175 | reply[len] = '\0'; | |
176 | sr_spew("Received '%s'.", reply); | |
177 | ||
178 | return SR_OK; | |
179 | } | |
180 | ||
181 | static int get_cfg_float(const struct sr_dev_inst *sdi, char *cmd, float *f) | |
182 | { | |
183 | char buf[256], *e; | |
184 | ||
185 | if (get_cfg(sdi, cmd, buf) != SR_OK) | |
186 | return SR_ERR; | |
187 | *f = strtof(buf, &e); | |
188 | if (e == buf || (fpclassify(*f) & (FP_ZERO | FP_NORMAL)) == 0) { | |
189 | sr_dbg("failed to parse response to '%s': '%s'", cmd, buf); | |
190 | return SR_ERR; | |
191 | } | |
192 | ||
193 | return SR_OK; | |
194 | } | |
195 | ||
196 | static int get_cfg_string(const struct sr_dev_inst *sdi, char *cmd, char **buf) | |
197 | { | |
198 | ||
199 | if (!(*buf = g_try_malloc0(256))) | |
200 | return SR_ERR_MALLOC; | |
201 | ||
202 | if (get_cfg(sdi, cmd, *buf) != SR_OK) | |
203 | return SR_ERR; | |
204 | ||
205 | return SR_OK; | |
206 | } | |
207 | ||
208 | SR_PRIV int rigol_ds1xx2_get_dev_cfg(const struct sr_dev_inst *sdi) | |
209 | { | |
210 | struct dev_context *devc; | |
211 | char *t_s, *cmd; | |
212 | int i, res; | |
213 | ||
214 | devc = sdi->priv; | |
215 | ||
216 | /* Analog channel state. */ | |
217 | if (get_cfg_string(sdi, ":CHAN1:DISP?", &t_s) != SR_OK) | |
218 | return SR_ERR; | |
219 | devc->analog_channels[0] = !strcmp(t_s, "ON") ? TRUE : FALSE; | |
220 | g_free(t_s); | |
221 | if (get_cfg_string(sdi, ":CHAN2:DISP?", &t_s) != SR_OK) | |
222 | return SR_ERR; | |
223 | devc->analog_channels[1] = !strcmp(t_s, "ON") ? TRUE : FALSE; | |
224 | g_free(t_s); | |
225 | sr_dbg("Current analog channel state CH1 %s CH2 %s", | |
226 | devc->analog_channels[0] ? "on" : "off", | |
227 | devc->analog_channels[1] ? "on" : "off"); | |
228 | ||
229 | /* Digital channel state. */ | |
230 | if (devc->has_digital) { | |
231 | sr_dbg("Current digital channel state:"); | |
232 | for (i = 0; i < 16; i++) { | |
233 | cmd = g_strdup_printf(":DIG%d:TURN?", i); | |
234 | res = get_cfg_string(sdi, cmd, &t_s); | |
235 | g_free(cmd); | |
236 | if (res != SR_OK) | |
237 | return SR_ERR; | |
238 | devc->digital_channels[i] = !strcmp(t_s, "ON") ? TRUE : FALSE; | |
239 | g_free(t_s); | |
240 | sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "on" : "off"); | |
241 | } | |
242 | } | |
243 | ||
244 | /* Timebase. */ | |
245 | if (get_cfg_float(sdi, ":TIM:SCAL?", &devc->timebase) != SR_OK) | |
246 | return SR_ERR; | |
247 | sr_dbg("Current timebase %f", devc->timebase); | |
248 | ||
249 | /* Vertical gain. */ | |
250 | if (get_cfg_float(sdi, ":CHAN1:SCAL?", &devc->vdiv[0]) != SR_OK) | |
251 | return SR_ERR; | |
252 | if (get_cfg_float(sdi, ":CHAN2:SCAL?", &devc->vdiv[1]) != SR_OK) | |
253 | return SR_ERR; | |
254 | sr_dbg("Current vertical gain CH1 %f CH2 %f", devc->vdiv[0], devc->vdiv[1]); | |
255 | ||
256 | /* Vertical offset. */ | |
257 | if (get_cfg_float(sdi, ":CHAN1:OFFS?", &devc->vert_offset[0]) != SR_OK) | |
258 | return SR_ERR; | |
259 | if (get_cfg_float(sdi, ":CHAN2:OFFS?", &devc->vert_offset[1]) != SR_OK) | |
260 | return SR_ERR; | |
261 | sr_dbg("Current vertical offset CH1 %f CH2 %f", devc->vert_offset[0], | |
262 | devc->vert_offset[1]); | |
263 | ||
264 | /* Coupling. */ | |
265 | if (get_cfg_string(sdi, ":CHAN1:COUP?", &devc->coupling[0]) != SR_OK) | |
266 | return SR_ERR; | |
267 | if (get_cfg_string(sdi, ":CHAN2:COUP?", &devc->coupling[1]) != SR_OK) | |
268 | return SR_ERR; | |
269 | sr_dbg("Current coupling CH1 %s CH2 %s", devc->coupling[0], | |
270 | devc->coupling[1]); | |
271 | ||
272 | /* Trigger source. */ | |
273 | if (get_cfg_string(sdi, ":TRIG:EDGE:SOUR?", &devc->trigger_source) != SR_OK) | |
274 | return SR_ERR; | |
275 | sr_dbg("Current trigger source %s", devc->trigger_source); | |
276 | ||
277 | /* Horizontal trigger position. */ | |
278 | if (get_cfg_float(sdi, ":TIM:OFFS?", &devc->horiz_triggerpos) != SR_OK) | |
279 | return SR_ERR; | |
280 | sr_dbg("Current horizontal trigger position %f", devc->horiz_triggerpos); | |
281 | ||
282 | /* Trigger slope. */ | |
283 | if (get_cfg_string(sdi, ":TRIG:EDGE:SLOP?", &devc->trigger_slope) != SR_OK) | |
284 | return SR_ERR; | |
285 | sr_dbg("Current trigger slope %s", devc->trigger_slope); | |
286 | ||
287 | return SR_OK; | |
288 | } | |
289 |