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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 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include <fcntl.h> | |
21 | #include <unistd.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <glib.h> | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | #include "protocol.h" | |
28 | ||
29 | static const int hwcaps[] = { | |
30 | SR_CONF_OSCILLOSCOPE, | |
31 | SR_CONF_LIMIT_SAMPLES, | |
32 | SR_CONF_TIMEBASE, | |
33 | SR_CONF_TRIGGER_SOURCE, | |
34 | SR_CONF_TRIGGER_SLOPE, | |
35 | SR_CONF_HORIZ_TRIGGERPOS, | |
36 | SR_CONF_VDIV, | |
37 | SR_CONF_COUPLING, | |
38 | 0, | |
39 | }; | |
40 | ||
41 | static const struct sr_rational timebases[] = { | |
42 | /* nanoseconds */ | |
43 | { 2, 1000000000 }, | |
44 | { 5, 1000000000 }, | |
45 | { 10, 1000000000 }, | |
46 | { 20, 1000000000 }, | |
47 | { 50, 1000000000 }, | |
48 | { 100, 1000000000 }, | |
49 | { 500, 1000000000 }, | |
50 | /* microseconds */ | |
51 | { 1, 1000000 }, | |
52 | { 2, 1000000 }, | |
53 | { 5, 1000000 }, | |
54 | { 10, 1000000 }, | |
55 | { 20, 1000000 }, | |
56 | { 50, 1000000 }, | |
57 | { 100, 1000000 }, | |
58 | { 200, 1000000 }, | |
59 | { 500, 1000000 }, | |
60 | /* milliseconds */ | |
61 | { 1, 1000 }, | |
62 | { 2, 1000 }, | |
63 | { 5, 1000 }, | |
64 | { 10, 1000 }, | |
65 | { 20, 1000 }, | |
66 | { 50, 1000 }, | |
67 | { 100, 1000 }, | |
68 | { 200, 1000 }, | |
69 | { 500, 1000 }, | |
70 | /* seconds */ | |
71 | { 1, 1 }, | |
72 | { 2, 1 }, | |
73 | { 5, 1 }, | |
74 | { 10, 1 }, | |
75 | { 20, 1 }, | |
76 | { 50, 1 }, | |
77 | { 0, 0}, | |
78 | }; | |
79 | ||
80 | static const struct sr_rational vdivs[] = { | |
81 | /* millivolts */ | |
82 | { 2, 1000 }, | |
83 | { 5, 1000 }, | |
84 | { 10, 1000 }, | |
85 | { 20, 1000 }, | |
86 | { 50, 1000 }, | |
87 | { 100, 1000 }, | |
88 | { 200, 1000 }, | |
89 | { 500, 1000 }, | |
90 | /* volts */ | |
91 | { 1, 1 }, | |
92 | { 2, 1 }, | |
93 | { 5, 1 }, | |
94 | { 10, 1 }, | |
95 | { 0, 0 }, | |
96 | }; | |
97 | ||
98 | static const char *trigger_sources[] = { | |
99 | "CH1", | |
100 | "CH2", | |
101 | "EXT", | |
102 | "AC Line", | |
103 | NULL, | |
104 | }; | |
105 | ||
106 | static const char *coupling[] = { | |
107 | "AC", | |
108 | "DC", | |
109 | "GND", | |
110 | NULL, | |
111 | }; | |
112 | ||
113 | static const char *supported_models[] = { | |
114 | "DS1052E", | |
115 | "DS1102E", | |
116 | "DS1052D", | |
117 | "DS1102D" | |
118 | }; | |
119 | ||
120 | SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info; | |
121 | static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info; | |
122 | ||
123 | /* Properly close and free all devices. */ | |
124 | static int clear_instances(void) | |
125 | { | |
126 | struct sr_dev_inst *sdi; | |
127 | struct drv_context *drvc; | |
128 | struct dev_context *devc; | |
129 | GSList *l; | |
130 | ||
131 | if (!(drvc = di->priv)) | |
132 | return SR_OK; | |
133 | ||
134 | for (l = drvc->instances; l; l = l->next) { | |
135 | if (!(sdi = l->data)) | |
136 | continue; | |
137 | if (!(devc = sdi->priv)) | |
138 | continue; | |
139 | ||
140 | g_free(devc->device); | |
141 | g_slist_free(devc->enabled_probes); | |
142 | close(devc->fd); | |
143 | ||
144 | sr_dev_inst_free(sdi); | |
145 | } | |
146 | ||
147 | g_slist_free(drvc->instances); | |
148 | drvc->instances = NULL; | |
149 | ||
150 | return SR_OK; | |
151 | } | |
152 | ||
153 | static int hw_init(struct sr_context *sr_ctx) | |
154 | { | |
155 | return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN); | |
156 | } | |
157 | ||
158 | static GSList *hw_scan(GSList *options) | |
159 | { | |
160 | struct drv_context *drvc; | |
161 | struct sr_dev_inst *sdi; | |
162 | struct dev_context *devc; | |
163 | struct sr_probe *probe; | |
164 | GSList *devices; | |
165 | GDir *dir; | |
166 | const gchar *dev_name; | |
167 | const gchar *dev_dir = "/dev/"; | |
168 | const gchar *prefix = "usbtmc"; | |
169 | gchar *device; | |
170 | const gchar *idn_query = "*IDN?"; | |
171 | int len, num_tokens, fd, i; | |
172 | const gchar *delimiter = ","; | |
173 | gchar **tokens; | |
174 | const char *manufacturer, *model, *version; | |
175 | int num_models; | |
176 | gboolean matched = FALSE; | |
177 | char buf[256]; | |
178 | ||
179 | (void)options; | |
180 | ||
181 | drvc = di->priv; | |
182 | drvc->instances = NULL; | |
183 | ||
184 | devices = NULL; | |
185 | ||
186 | dir = g_dir_open("/sys/class/usb/", 0, NULL); | |
187 | ||
188 | if (dir == NULL) | |
189 | return NULL; | |
190 | ||
191 | while ((dev_name = g_dir_read_name(dir)) != NULL) { | |
192 | if (strncmp(dev_name, prefix, strlen(prefix))) | |
193 | continue; | |
194 | ||
195 | device = g_strconcat(dev_dir, dev_name, NULL); | |
196 | ||
197 | fd = open(device, O_RDWR); | |
198 | len = write(fd, idn_query, strlen(idn_query)); | |
199 | len = read(fd, buf, sizeof(buf)); | |
200 | close(fd); | |
201 | if (len == 0) { | |
202 | g_free(device); | |
203 | return NULL; | |
204 | } | |
205 | ||
206 | buf[len] = 0; | |
207 | tokens = g_strsplit(buf, delimiter, 0); | |
208 | close(fd); | |
209 | sr_dbg("response: %s %d [%s]", device, len, buf); | |
210 | ||
211 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
212 | ||
213 | if (num_tokens < 4) { | |
214 | g_strfreev(tokens); | |
215 | g_free(device); | |
216 | return NULL; | |
217 | } | |
218 | ||
219 | manufacturer = tokens[0]; | |
220 | model = tokens[1]; | |
221 | version = tokens[3]; | |
222 | ||
223 | if (strcmp(manufacturer, "Rigol Technologies")) { | |
224 | g_strfreev(tokens); | |
225 | g_free(device); | |
226 | return NULL; | |
227 | } | |
228 | ||
229 | num_models = sizeof(supported_models) / sizeof(supported_models[0]); | |
230 | ||
231 | for (i = 0; i < num_models; i++) { | |
232 | if (!strcmp(model, supported_models[i])) { | |
233 | matched = 1; | |
234 | break; | |
235 | } | |
236 | } | |
237 | ||
238 | if (!matched || !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, | |
239 | manufacturer, model, version))) { | |
240 | g_strfreev(tokens); | |
241 | g_free(device); | |
242 | return NULL; | |
243 | } | |
244 | ||
245 | g_strfreev(tokens); | |
246 | ||
247 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { | |
248 | sr_err("Device context malloc failed."); | |
249 | g_free(device); | |
250 | return NULL; | |
251 | } | |
252 | ||
253 | devc->device = device; | |
254 | ||
255 | sdi->priv = devc; | |
256 | sdi->driver = di; | |
257 | ||
258 | for (i = 0; i < 2; i++) { | |
259 | if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, | |
260 | i == 0 ? "CH1" : "CH2"))) | |
261 | return NULL; | |
262 | sdi->probes = g_slist_append(sdi->probes, probe); | |
263 | } | |
264 | ||
265 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
266 | devices = g_slist_append(devices, sdi); | |
267 | } | |
268 | ||
269 | g_dir_close(dir); | |
270 | ||
271 | return devices; | |
272 | } | |
273 | ||
274 | static GSList *hw_dev_list(void) | |
275 | { | |
276 | struct drv_context *drvc; | |
277 | ||
278 | drvc = di->priv; | |
279 | ||
280 | return drvc->instances; | |
281 | } | |
282 | ||
283 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
284 | { | |
285 | struct dev_context *devc; | |
286 | int fd; | |
287 | ||
288 | devc = sdi->priv; | |
289 | ||
290 | if ((fd = open(devc->device, O_RDWR)) == -1) | |
291 | return SR_ERR; | |
292 | ||
293 | devc->fd = fd; | |
294 | ||
295 | devc->scale = 1; | |
296 | ||
297 | return SR_OK; | |
298 | } | |
299 | ||
300 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
301 | { | |
302 | struct dev_context *devc; | |
303 | ||
304 | devc = sdi->priv; | |
305 | ||
306 | close(devc->fd); | |
307 | ||
308 | return SR_OK; | |
309 | } | |
310 | ||
311 | static int hw_cleanup(void) | |
312 | { | |
313 | clear_instances(); | |
314 | ||
315 | return SR_OK; | |
316 | } | |
317 | ||
318 | static int config_set(int id, const void *value, const struct sr_dev_inst *sdi) | |
319 | { | |
320 | struct dev_context *devc; | |
321 | uint64_t tmp_u64; | |
322 | float tmp_float; | |
323 | struct sr_rational tmp_rat; | |
324 | int ret, i, j; | |
325 | char *channel; | |
326 | ||
327 | devc = sdi->priv; | |
328 | ||
329 | if (sdi->status != SR_ST_ACTIVE) { | |
330 | sr_err("Device inactive, can't set config options."); | |
331 | return SR_ERR; | |
332 | } | |
333 | ||
334 | ret = SR_OK; | |
335 | switch (id) { | |
336 | case SR_CONF_LIMIT_FRAMES: | |
337 | devc->limit_frames = *(const uint64_t *)value; | |
338 | break; | |
339 | case SR_CONF_TRIGGER_SLOPE: | |
340 | tmp_u64 = *(const int *)value; | |
341 | rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n", | |
342 | tmp_u64 ? "POS" : "NEG"); | |
343 | break; | |
344 | case SR_CONF_HORIZ_TRIGGERPOS: | |
345 | tmp_float = *(const float *)value; | |
346 | rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float); | |
347 | break; | |
348 | case SR_CONF_TIMEBASE: | |
349 | tmp_rat = *(const struct sr_rational *)value; | |
350 | rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n", | |
351 | (float)tmp_rat.p / tmp_rat.q); | |
352 | break; | |
353 | case SR_CONF_TRIGGER_SOURCE: | |
354 | if (!strcmp(value, "CH1")) | |
355 | channel = "CHAN1"; | |
356 | else if (!strcmp(value, "CH2")) | |
357 | channel = "CHAN2"; | |
358 | else if (!strcmp(value, "EXT")) | |
359 | channel = "EXT"; | |
360 | else if (!strcmp(value, "AC Line")) | |
361 | channel = "ACL"; | |
362 | else { | |
363 | ret = SR_ERR_ARG; | |
364 | break; | |
365 | } | |
366 | rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel); | |
367 | break; | |
368 | case SR_CONF_VDIV: | |
369 | /* TODO: Not supporting vdiv per channel yet. */ | |
370 | tmp_rat = *(const struct sr_rational *)value; | |
371 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
372 | if (vdivs[i].p == tmp_rat.p | |
373 | && vdivs[i].q == tmp_rat.q) { | |
374 | devc->scale = (float)tmp_rat.p / tmp_rat.q; | |
375 | for (j = 0; j < 2; j++) | |
376 | rigol_ds1xx2_send_data(devc->fd, | |
377 | ":CHAN%d:SCAL %.3f\n", j, devc->scale); | |
378 | break; | |
379 | } | |
380 | } | |
381 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
382 | ret = SR_ERR_ARG; | |
383 | break; | |
384 | case SR_CONF_COUPLING: | |
385 | /* TODO: Not supporting coupling per channel yet. */ | |
386 | for (i = 0; coupling[i]; i++) { | |
387 | if (!strcmp(value, coupling[i])) { | |
388 | for (j = 0; j < 2; j++) | |
389 | rigol_ds1xx2_send_data(devc->fd, | |
390 | ":CHAN%d:COUP %s\n", j, coupling[i]); | |
391 | break; | |
392 | } | |
393 | } | |
394 | if (coupling[i] == 0) | |
395 | ret = SR_ERR_ARG; | |
396 | break; | |
397 | default: | |
398 | sr_err("Unknown hardware capability: %d.", id); | |
399 | ret = SR_ERR_ARG; | |
400 | break; | |
401 | } | |
402 | ||
403 | return ret; | |
404 | } | |
405 | ||
406 | static int config_list(int key, const void **data, const struct sr_dev_inst *sdi) | |
407 | { | |
408 | ||
409 | (void)sdi; | |
410 | ||
411 | switch (key) { | |
412 | case SR_CONF_DEVICE_OPTIONS: | |
413 | *data = hwcaps; | |
414 | break; | |
415 | case SR_CONF_COUPLING: | |
416 | *data = coupling; | |
417 | break; | |
418 | case SR_CONF_VDIV: | |
419 | *data = vdivs; | |
420 | break; | |
421 | case SR_CONF_TIMEBASE: | |
422 | *data = timebases; | |
423 | break; | |
424 | case SR_CONF_TRIGGER_SOURCE: | |
425 | *data = trigger_sources; | |
426 | break; | |
427 | default: | |
428 | return SR_ERR_ARG; | |
429 | } | |
430 | ||
431 | return SR_OK; | |
432 | } | |
433 | ||
434 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
435 | void *cb_data) | |
436 | { | |
437 | struct dev_context *devc; | |
438 | struct sr_datafeed_packet packet; | |
439 | struct sr_datafeed_header header; | |
440 | char buf[256]; | |
441 | int len; | |
442 | ||
443 | (void)cb_data; | |
444 | ||
445 | devc = sdi->priv; | |
446 | ||
447 | devc->num_frames = 0; | |
448 | ||
449 | sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi); | |
450 | ||
451 | /* Send header packet to the session bus. */ | |
452 | packet.type = SR_DF_HEADER; | |
453 | packet.payload = (unsigned char *)&header; | |
454 | header.feed_version = 1; | |
455 | gettimeofday(&header.starttime, NULL); | |
456 | sr_session_send(cb_data, &packet); | |
457 | ||
458 | /* Hardcoded to CH1 only. */ | |
459 | devc->enabled_probes = g_slist_append(NULL, sdi->probes->data); | |
460 | rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n"); | |
461 | len = read(devc->fd, buf, sizeof(buf)); | |
462 | buf[len] = 0; | |
463 | devc->scale = atof(buf); | |
464 | sr_dbg("Scale is %.3f.", devc->scale); | |
465 | rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n"); | |
466 | len = read(devc->fd, buf, sizeof(buf)); | |
467 | buf[len] = 0; | |
468 | devc->offset = atof(buf); | |
469 | sr_dbg("Offset is %.6f.", devc->offset); | |
470 | rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n"); | |
471 | ||
472 | return SR_OK; | |
473 | } | |
474 | ||
475 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
476 | { | |
477 | struct dev_context *devc; | |
478 | ||
479 | (void)cb_data; | |
480 | ||
481 | devc = sdi->priv; | |
482 | ||
483 | if (sdi->status != SR_ST_ACTIVE) { | |
484 | sr_err("Device inactive, can't stop acquisition."); | |
485 | return SR_ERR; | |
486 | } | |
487 | ||
488 | sr_source_remove(devc->fd); | |
489 | ||
490 | return SR_OK; | |
491 | } | |
492 | ||
493 | SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = { | |
494 | .name = "rigol-ds1xx2", | |
495 | .longname = "Rigol DS1xx2", | |
496 | .api_version = 1, | |
497 | .init = hw_init, | |
498 | .cleanup = hw_cleanup, | |
499 | .scan = hw_scan, | |
500 | .dev_list = hw_dev_list, | |
501 | .dev_clear = clear_instances, | |
502 | .config_set = config_set, | |
503 | .config_list = config_list, | |
504 | .dev_open = hw_dev_open, | |
505 | .dev_close = hw_dev_close, | |
506 | .dev_acquisition_start = hw_dev_acquisition_start, | |
507 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
508 | .priv = NULL, | |
509 | }; |