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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 | gboolean matched = FALSE; | |
176 | char buf[256]; | |
177 | ||
178 | (void)options; | |
179 | ||
180 | drvc = di->priv; | |
181 | drvc->instances = NULL; | |
182 | ||
183 | devices = NULL; | |
184 | ||
185 | dir = g_dir_open("/sys/class/usb/", 0, NULL); | |
186 | ||
187 | if (dir == NULL) | |
188 | return NULL; | |
189 | ||
190 | while ((dev_name = g_dir_read_name(dir)) != NULL) { | |
191 | if (strncmp(dev_name, prefix, strlen(prefix))) | |
192 | continue; | |
193 | ||
194 | device = g_strconcat(dev_dir, dev_name, NULL); | |
195 | ||
196 | fd = open(device, O_RDWR); | |
197 | len = write(fd, idn_query, strlen(idn_query)); | |
198 | len = read(fd, buf, sizeof(buf)); | |
199 | close(fd); | |
200 | if (len == 0) { | |
201 | g_free(device); | |
202 | return NULL; | |
203 | } | |
204 | ||
205 | buf[len] = 0; | |
206 | tokens = g_strsplit(buf, delimiter, 0); | |
207 | close(fd); | |
208 | sr_dbg("response: %s %d [%s]", device, len, buf); | |
209 | ||
210 | for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++); | |
211 | ||
212 | if (num_tokens < 4) { | |
213 | g_strfreev(tokens); | |
214 | g_free(device); | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | manufacturer = tokens[0]; | |
219 | model = tokens[1]; | |
220 | version = tokens[3]; | |
221 | ||
222 | if (strcmp(manufacturer, "Rigol Technologies")) { | |
223 | g_strfreev(tokens); | |
224 | g_free(device); | |
225 | return NULL; | |
226 | } | |
227 | ||
228 | for (i = 0; i < ARRAY_SIZE(supported_models); i++) { | |
229 | if (!strcmp(model, supported_models[i])) { | |
230 | matched = 1; | |
231 | break; | |
232 | } | |
233 | } | |
234 | ||
235 | if (!matched || !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, | |
236 | manufacturer, model, version))) { | |
237 | g_strfreev(tokens); | |
238 | g_free(device); | |
239 | return NULL; | |
240 | } | |
241 | ||
242 | g_strfreev(tokens); | |
243 | ||
244 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { | |
245 | sr_err("Device context malloc failed."); | |
246 | g_free(device); | |
247 | return NULL; | |
248 | } | |
249 | ||
250 | devc->device = device; | |
251 | ||
252 | sdi->priv = devc; | |
253 | sdi->driver = di; | |
254 | ||
255 | for (i = 0; i < 2; i++) { | |
256 | if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, | |
257 | i == 0 ? "CH1" : "CH2"))) | |
258 | return NULL; | |
259 | sdi->probes = g_slist_append(sdi->probes, probe); | |
260 | } | |
261 | ||
262 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
263 | devices = g_slist_append(devices, sdi); | |
264 | } | |
265 | ||
266 | g_dir_close(dir); | |
267 | ||
268 | return devices; | |
269 | } | |
270 | ||
271 | static GSList *hw_dev_list(void) | |
272 | { | |
273 | return ((struct drv_context *)(di->priv))->instances; | |
274 | } | |
275 | ||
276 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
277 | { | |
278 | struct dev_context *devc; | |
279 | int fd; | |
280 | ||
281 | devc = sdi->priv; | |
282 | ||
283 | if ((fd = open(devc->device, O_RDWR)) == -1) | |
284 | return SR_ERR; | |
285 | ||
286 | devc->fd = fd; | |
287 | ||
288 | devc->scale = 1; | |
289 | ||
290 | return SR_OK; | |
291 | } | |
292 | ||
293 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
294 | { | |
295 | struct dev_context *devc; | |
296 | ||
297 | devc = sdi->priv; | |
298 | ||
299 | close(devc->fd); | |
300 | ||
301 | return SR_OK; | |
302 | } | |
303 | ||
304 | static int hw_cleanup(void) | |
305 | { | |
306 | clear_instances(); | |
307 | ||
308 | return SR_OK; | |
309 | } | |
310 | ||
311 | static int config_set(int id, const void *value, const struct sr_dev_inst *sdi) | |
312 | { | |
313 | struct dev_context *devc; | |
314 | uint64_t tmp_u64; | |
315 | float tmp_float; | |
316 | struct sr_rational tmp_rat; | |
317 | int ret, i, j; | |
318 | char *channel; | |
319 | ||
320 | devc = sdi->priv; | |
321 | ||
322 | if (sdi->status != SR_ST_ACTIVE) { | |
323 | sr_err("Device inactive, can't set config options."); | |
324 | return SR_ERR; | |
325 | } | |
326 | ||
327 | ret = SR_OK; | |
328 | switch (id) { | |
329 | case SR_CONF_LIMIT_FRAMES: | |
330 | devc->limit_frames = *(const uint64_t *)value; | |
331 | break; | |
332 | case SR_CONF_TRIGGER_SLOPE: | |
333 | tmp_u64 = *(const int *)value; | |
334 | rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n", | |
335 | tmp_u64 ? "POS" : "NEG"); | |
336 | break; | |
337 | case SR_CONF_HORIZ_TRIGGERPOS: | |
338 | tmp_float = *(const float *)value; | |
339 | rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_float); | |
340 | break; | |
341 | case SR_CONF_TIMEBASE: | |
342 | tmp_rat = *(const struct sr_rational *)value; | |
343 | rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n", | |
344 | (float)tmp_rat.p / tmp_rat.q); | |
345 | break; | |
346 | case SR_CONF_TRIGGER_SOURCE: | |
347 | if (!strcmp(value, "CH1")) | |
348 | channel = "CHAN1"; | |
349 | else if (!strcmp(value, "CH2")) | |
350 | channel = "CHAN2"; | |
351 | else if (!strcmp(value, "EXT")) | |
352 | channel = "EXT"; | |
353 | else if (!strcmp(value, "AC Line")) | |
354 | channel = "ACL"; | |
355 | else { | |
356 | ret = SR_ERR_ARG; | |
357 | break; | |
358 | } | |
359 | rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel); | |
360 | break; | |
361 | case SR_CONF_VDIV: | |
362 | /* TODO: Not supporting vdiv per channel yet. */ | |
363 | tmp_rat = *(const struct sr_rational *)value; | |
364 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
365 | if (vdivs[i].p == tmp_rat.p | |
366 | && vdivs[i].q == tmp_rat.q) { | |
367 | devc->scale = (float)tmp_rat.p / tmp_rat.q; | |
368 | for (j = 0; j < 2; j++) | |
369 | rigol_ds1xx2_send_data(devc->fd, | |
370 | ":CHAN%d:SCAL %.3f\n", j, devc->scale); | |
371 | break; | |
372 | } | |
373 | } | |
374 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
375 | ret = SR_ERR_ARG; | |
376 | break; | |
377 | case SR_CONF_COUPLING: | |
378 | /* TODO: Not supporting coupling per channel yet. */ | |
379 | for (i = 0; coupling[i]; i++) { | |
380 | if (!strcmp(value, coupling[i])) { | |
381 | for (j = 0; j < 2; j++) | |
382 | rigol_ds1xx2_send_data(devc->fd, | |
383 | ":CHAN%d:COUP %s\n", j, coupling[i]); | |
384 | break; | |
385 | } | |
386 | } | |
387 | if (coupling[i] == 0) | |
388 | ret = SR_ERR_ARG; | |
389 | break; | |
390 | default: | |
391 | sr_err("Unknown hardware capability: %d.", id); | |
392 | ret = SR_ERR_ARG; | |
393 | break; | |
394 | } | |
395 | ||
396 | return ret; | |
397 | } | |
398 | ||
399 | static int config_list(int key, const void **data, const struct sr_dev_inst *sdi) | |
400 | { | |
401 | ||
402 | (void)sdi; | |
403 | ||
404 | switch (key) { | |
405 | case SR_CONF_DEVICE_OPTIONS: | |
406 | *data = hwcaps; | |
407 | break; | |
408 | case SR_CONF_COUPLING: | |
409 | *data = coupling; | |
410 | break; | |
411 | case SR_CONF_VDIV: | |
412 | *data = vdivs; | |
413 | break; | |
414 | case SR_CONF_TIMEBASE: | |
415 | *data = timebases; | |
416 | break; | |
417 | case SR_CONF_TRIGGER_SOURCE: | |
418 | *data = trigger_sources; | |
419 | break; | |
420 | default: | |
421 | return SR_ERR_ARG; | |
422 | } | |
423 | ||
424 | return SR_OK; | |
425 | } | |
426 | ||
427 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
428 | void *cb_data) | |
429 | { | |
430 | struct dev_context *devc; | |
431 | char buf[256]; | |
432 | int len; | |
433 | ||
434 | (void)cb_data; | |
435 | ||
436 | devc = sdi->priv; | |
437 | ||
438 | devc->num_frames = 0; | |
439 | ||
440 | sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi); | |
441 | ||
442 | /* Send header packet to the session bus. */ | |
443 | std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN); | |
444 | ||
445 | /* Hardcoded to CH1 only. */ | |
446 | devc->enabled_probes = g_slist_append(NULL, sdi->probes->data); | |
447 | rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n"); | |
448 | len = read(devc->fd, buf, sizeof(buf)); | |
449 | buf[len] = 0; | |
450 | devc->scale = atof(buf); | |
451 | sr_dbg("Scale is %.3f.", devc->scale); | |
452 | rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n"); | |
453 | len = read(devc->fd, buf, sizeof(buf)); | |
454 | buf[len] = 0; | |
455 | devc->offset = atof(buf); | |
456 | sr_dbg("Offset is %.6f.", devc->offset); | |
457 | rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n"); | |
458 | ||
459 | return SR_OK; | |
460 | } | |
461 | ||
462 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
463 | { | |
464 | struct dev_context *devc; | |
465 | ||
466 | (void)cb_data; | |
467 | ||
468 | devc = sdi->priv; | |
469 | ||
470 | if (sdi->status != SR_ST_ACTIVE) { | |
471 | sr_err("Device inactive, can't stop acquisition."); | |
472 | return SR_ERR; | |
473 | } | |
474 | ||
475 | sr_source_remove(devc->fd); | |
476 | ||
477 | return SR_OK; | |
478 | } | |
479 | ||
480 | SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = { | |
481 | .name = "rigol-ds1xx2", | |
482 | .longname = "Rigol DS1xx2", | |
483 | .api_version = 1, | |
484 | .init = hw_init, | |
485 | .cleanup = hw_cleanup, | |
486 | .scan = hw_scan, | |
487 | .dev_list = hw_dev_list, | |
488 | .dev_clear = clear_instances, | |
489 | .config_get = NULL, | |
490 | .config_set = config_set, | |
491 | .config_list = config_list, | |
492 | .dev_open = hw_dev_open, | |
493 | .dev_close = hw_dev_close, | |
494 | .dev_acquisition_start = hw_dev_acquisition_start, | |
495 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
496 | .priv = NULL, | |
497 | }; |