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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com> | |
6 | * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <stdlib.h> | |
24 | #include <unistd.h> | |
25 | #include <string.h> | |
26 | #include <math.h> | |
27 | #ifdef _WIN32 | |
28 | #include <io.h> | |
29 | #include <fcntl.h> | |
30 | #define pipe(fds) _pipe(fds, 4096, _O_BINARY) | |
31 | #endif | |
32 | #include "libsigrok.h" | |
33 | #include "libsigrok-internal.h" | |
34 | ||
35 | #define LOG_PREFIX "demo" | |
36 | ||
37 | #define DEFAULT_NUM_LOGIC_PROBES 8 | |
38 | #define DEFAULT_NUM_ANALOG_PROBES 4 | |
39 | ||
40 | /* The size in bytes of chunks to send through the session bus. */ | |
41 | #define LOGIC_BUFSIZE 4096 | |
42 | /* Size of the analog pattern space per channel. */ | |
43 | #define ANALOG_BUFSIZE 4096 | |
44 | ||
45 | #define ANALOG_AMPLITUDE 25 | |
46 | #define ANALOG_SAMPLES_PER_PERIOD 20 | |
47 | ||
48 | /* Logic patterns we can generate. */ | |
49 | enum { | |
50 | /** | |
51 | * Spells "sigrok" across 8 probes using '0's (with '1's as | |
52 | * "background") when displayed using the 'bits' output format. | |
53 | * The pattern is repeasted every 8 probes, shifted to the right | |
54 | * in time by one bit. | |
55 | */ | |
56 | PATTERN_SIGROK, | |
57 | ||
58 | /** Pseudo-random values on all probes. */ | |
59 | PATTERN_RANDOM, | |
60 | ||
61 | /** | |
62 | * Incrementing number across 8 probes. The pattern is repeasted | |
63 | * every 8 probes, shifted to the right in time by one bit. | |
64 | */ | |
65 | PATTERN_INC, | |
66 | ||
67 | /** All probes have a low logic state. */ | |
68 | PATTERN_ALL_LOW, | |
69 | ||
70 | /** All probes have a high logic state. */ | |
71 | PATTERN_ALL_HIGH, | |
72 | }; | |
73 | ||
74 | /* Analog patterns we can generate. */ | |
75 | enum { | |
76 | /** | |
77 | * Square wave. | |
78 | */ | |
79 | PATTERN_SQUARE, | |
80 | PATTERN_SINE, | |
81 | PATTERN_TRIANGLE, | |
82 | PATTERN_SAWTOOTH, | |
83 | }; | |
84 | ||
85 | static const char *logic_pattern_str[] = { | |
86 | "sigrok", | |
87 | "random", | |
88 | "incremental", | |
89 | "all-low", | |
90 | "all-high", | |
91 | }; | |
92 | ||
93 | static const char *analog_pattern_str[] = { | |
94 | "square", | |
95 | "sine", | |
96 | "triangle", | |
97 | "sawtooth", | |
98 | }; | |
99 | ||
100 | struct analog_gen { | |
101 | int pattern; | |
102 | float pattern_data[ANALOG_BUFSIZE]; | |
103 | unsigned int num_samples; | |
104 | struct sr_datafeed_analog packet; | |
105 | }; | |
106 | ||
107 | /* Private, per-device-instance driver context. */ | |
108 | struct dev_context { | |
109 | int pipe_fds[2]; | |
110 | GIOChannel *channel; | |
111 | uint64_t cur_samplerate; | |
112 | uint64_t limit_samples; | |
113 | uint64_t limit_msec; | |
114 | uint64_t samples_counter; | |
115 | int64_t starttime; | |
116 | uint64_t step; | |
117 | /* Logic */ | |
118 | int32_t num_logic_probes; | |
119 | unsigned int logic_unitsize; | |
120 | /* There is only ever one logic probe group, so its pattern goes here. */ | |
121 | uint8_t logic_pattern; | |
122 | unsigned char logic_data[LOGIC_BUFSIZE]; | |
123 | /* Analog */ | |
124 | int32_t num_analog_probes; | |
125 | GSList *analog_probe_groups; | |
126 | }; | |
127 | ||
128 | static const int32_t scanopts[] = { | |
129 | SR_CONF_NUM_LOGIC_PROBES, | |
130 | SR_CONF_NUM_ANALOG_PROBES, | |
131 | }; | |
132 | ||
133 | static const int devopts[] = { | |
134 | SR_CONF_LOGIC_ANALYZER, | |
135 | SR_CONF_DEMO_DEV, | |
136 | SR_CONF_SAMPLERATE, | |
137 | SR_CONF_LIMIT_SAMPLES, | |
138 | SR_CONF_LIMIT_MSEC, | |
139 | }; | |
140 | ||
141 | static const int devopts_pg[] = { | |
142 | SR_CONF_PATTERN_MODE, | |
143 | }; | |
144 | ||
145 | static const uint64_t samplerates[] = { | |
146 | SR_HZ(1), | |
147 | SR_GHZ(1), | |
148 | SR_HZ(1), | |
149 | }; | |
150 | ||
151 | static uint8_t pattern_sigrok[] = { | |
152 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, | |
153 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
154 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
155 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
156 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
157 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
158 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
159 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
160 | }; | |
161 | ||
162 | SR_PRIV struct sr_dev_driver demo_driver_info; | |
163 | static struct sr_dev_driver *di = &demo_driver_info; | |
164 | ||
165 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
166 | ||
167 | ||
168 | static int dev_clear(void) | |
169 | { | |
170 | return std_dev_clear(di, NULL); | |
171 | } | |
172 | ||
173 | static int init(struct sr_context *sr_ctx) | |
174 | { | |
175 | return std_init(sr_ctx, di, LOG_PREFIX); | |
176 | } | |
177 | ||
178 | static void generate_analog_pattern(const struct sr_probe_group *probe_group, uint64_t sample_rate) | |
179 | { | |
180 | struct analog_gen *ag; | |
181 | double t, frequency; | |
182 | float value; | |
183 | unsigned int num_samples, i; | |
184 | int last_end; | |
185 | ||
186 | ag = probe_group->priv; | |
187 | num_samples = ANALOG_BUFSIZE / sizeof(float); | |
188 | ||
189 | sr_dbg("Generating %s pattern for probe group %s", | |
190 | analog_pattern_str[ag->pattern], | |
191 | probe_group->name); | |
192 | ||
193 | switch (ag->pattern) { | |
194 | case PATTERN_SQUARE: | |
195 | value = ANALOG_AMPLITUDE; | |
196 | last_end = 0; | |
197 | for (i = 0; i < num_samples; i++) { | |
198 | if (i % 5 == 0) | |
199 | value = -value; | |
200 | if (i % 10 == 0) | |
201 | last_end = i - 1; | |
202 | ag->pattern_data[i] = value; | |
203 | } | |
204 | ag->num_samples = last_end; | |
205 | break; | |
206 | ||
207 | case PATTERN_SINE: | |
208 | frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
209 | ||
210 | /* Make sure the number of samples we put out is an integer | |
211 | * multiple of our period size */ | |
212 | /* FIXME we actually need only one period. A ringbuffer would be | |
213 | * usefull here.*/ | |
214 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
215 | num_samples--; | |
216 | ||
217 | for (i = 0; i < num_samples; i++) { | |
218 | t = (double) i / (double) sample_rate; | |
219 | ag->pattern_data[i] = ANALOG_AMPLITUDE * | |
220 | sin(2 * M_PI * frequency * t); | |
221 | } | |
222 | ||
223 | ag->num_samples = num_samples; | |
224 | break; | |
225 | ||
226 | case PATTERN_TRIANGLE: | |
227 | frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
228 | ||
229 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
230 | num_samples--; | |
231 | ||
232 | for (i = 0; i < num_samples; i++) { | |
233 | t = (double) i / (double) sample_rate; | |
234 | ag->pattern_data[i] = (2 * ANALOG_AMPLITUDE / M_PI) * | |
235 | asin(sin(2 * M_PI * frequency * t)); | |
236 | } | |
237 | ||
238 | ag->num_samples = num_samples; | |
239 | break; | |
240 | ||
241 | case PATTERN_SAWTOOTH: | |
242 | frequency = sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
243 | ||
244 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
245 | num_samples--; | |
246 | ||
247 | for (i = 0; i < num_samples; i++) { | |
248 | t = (double) i / (double) sample_rate; | |
249 | ag->pattern_data[i] = 2 * ANALOG_AMPLITUDE * | |
250 | ((t * frequency) - floor(0.5f + t * frequency)); | |
251 | } | |
252 | ||
253 | ag->num_samples = num_samples; | |
254 | break; | |
255 | } | |
256 | } | |
257 | ||
258 | static GSList *scan(GSList *options) | |
259 | { | |
260 | struct drv_context *drvc; | |
261 | struct dev_context *devc; | |
262 | struct sr_dev_inst *sdi; | |
263 | struct sr_probe *probe; | |
264 | struct sr_probe_group *pg; | |
265 | struct sr_config *src; | |
266 | struct analog_gen *ag; | |
267 | GSList *devices, *l; | |
268 | int num_logic_probes, num_analog_probes, pattern, i; | |
269 | char probe_name[16]; | |
270 | ||
271 | drvc = di->priv; | |
272 | ||
273 | num_logic_probes = DEFAULT_NUM_LOGIC_PROBES; | |
274 | num_analog_probes = DEFAULT_NUM_ANALOG_PROBES; | |
275 | for (l = options; l; l = l->next) { | |
276 | src = l->data; | |
277 | switch (src->key) { | |
278 | case SR_CONF_NUM_LOGIC_PROBES: | |
279 | num_logic_probes = g_variant_get_int32(src->data); | |
280 | break; | |
281 | case SR_CONF_NUM_ANALOG_PROBES: | |
282 | num_analog_probes = g_variant_get_int32(src->data); | |
283 | break; | |
284 | } | |
285 | } | |
286 | ||
287 | devices = NULL; | |
288 | sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "Demo device", NULL, NULL); | |
289 | if (!sdi) { | |
290 | sr_err("Device instance creation failed."); | |
291 | return NULL; | |
292 | } | |
293 | sdi->driver = di; | |
294 | ||
295 | if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { | |
296 | sr_err("Device context malloc failed."); | |
297 | return NULL; | |
298 | } | |
299 | devc->cur_samplerate = SR_KHZ(200); | |
300 | devc->limit_samples = 0; | |
301 | devc->limit_msec = 0; | |
302 | devc->step = 0; | |
303 | devc->num_logic_probes = num_logic_probes; | |
304 | devc->logic_unitsize = (devc->num_logic_probes + 7) / 8; | |
305 | devc->logic_pattern = PATTERN_SIGROK; | |
306 | devc->num_analog_probes = num_analog_probes; | |
307 | devc->analog_probe_groups = NULL; | |
308 | ||
309 | /* Logic probes, all in one probe group. */ | |
310 | if (!(pg = g_try_malloc(sizeof(struct sr_probe_group)))) | |
311 | return NULL; | |
312 | pg->name = g_strdup("Logic"); | |
313 | pg->probes = NULL; | |
314 | pg->priv = NULL; | |
315 | for (i = 0; i < num_logic_probes; i++) { | |
316 | sprintf(probe_name, "D%d", i); | |
317 | if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, probe_name))) | |
318 | return NULL; | |
319 | sdi->probes = g_slist_append(sdi->probes, probe); | |
320 | pg->probes = g_slist_append(pg->probes, probe); | |
321 | } | |
322 | sdi->probe_groups = g_slist_append(NULL, pg); | |
323 | ||
324 | /* Analog probes, probe groups and pattern generators. */ | |
325 | ||
326 | pattern = 0; | |
327 | for (i = 0; i < num_analog_probes; i++) { | |
328 | sprintf(probe_name, "A%d", i); | |
329 | if (!(probe = sr_probe_new(i + num_logic_probes, | |
330 | SR_PROBE_ANALOG, TRUE, probe_name))) | |
331 | return NULL; | |
332 | sdi->probes = g_slist_append(sdi->probes, probe); | |
333 | ||
334 | /* Every analog probe gets its own probe group. */ | |
335 | if (!(pg = g_try_malloc(sizeof(struct sr_probe_group)))) | |
336 | return NULL; | |
337 | pg->name = g_strdup(probe_name); | |
338 | pg->probes = g_slist_append(NULL, probe); | |
339 | ||
340 | /* Every probe group gets a generator struct. */ | |
341 | if (!(ag = g_try_malloc(sizeof(struct analog_gen)))) | |
342 | return NULL; | |
343 | ag->packet.probes = pg->probes; | |
344 | ag->packet.mq = 0; | |
345 | ag->packet.mqflags = 0; | |
346 | ag->packet.unit = SR_UNIT_VOLT; | |
347 | ag->packet.data = ag->pattern_data; | |
348 | ag->pattern = pattern; | |
349 | pg->priv = ag; | |
350 | ||
351 | sdi->probe_groups = g_slist_append(sdi->probe_groups, pg); | |
352 | devc->analog_probe_groups = g_slist_append(devc->analog_probe_groups, pg); | |
353 | ||
354 | if (++pattern == ARRAY_SIZE(analog_pattern_str)) | |
355 | pattern = 0; | |
356 | } | |
357 | ||
358 | sdi->priv = devc; | |
359 | devices = g_slist_append(devices, sdi); | |
360 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
361 | ||
362 | return devices; | |
363 | } | |
364 | ||
365 | static GSList *dev_list(void) | |
366 | { | |
367 | return ((struct drv_context *)(di->priv))->instances; | |
368 | } | |
369 | ||
370 | static int dev_open(struct sr_dev_inst *sdi) | |
371 | { | |
372 | sdi->status = SR_ST_ACTIVE; | |
373 | ||
374 | return SR_OK; | |
375 | } | |
376 | ||
377 | static int dev_close(struct sr_dev_inst *sdi) | |
378 | { | |
379 | sdi->status = SR_ST_INACTIVE; | |
380 | ||
381 | return SR_OK; | |
382 | } | |
383 | ||
384 | static int cleanup(void) | |
385 | { | |
386 | return dev_clear(); | |
387 | } | |
388 | ||
389 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, | |
390 | const struct sr_probe_group *probe_group) | |
391 | { | |
392 | struct dev_context *devc; | |
393 | struct sr_probe *probe; | |
394 | struct analog_gen *ag; | |
395 | int pattern; | |
396 | ||
397 | if (!sdi) | |
398 | return SR_ERR_ARG; | |
399 | ||
400 | devc = sdi->priv; | |
401 | switch (id) { | |
402 | case SR_CONF_SAMPLERATE: | |
403 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
404 | break; | |
405 | case SR_CONF_LIMIT_SAMPLES: | |
406 | *data = g_variant_new_uint64(devc->limit_samples); | |
407 | break; | |
408 | case SR_CONF_LIMIT_MSEC: | |
409 | *data = g_variant_new_uint64(devc->limit_msec); | |
410 | break; | |
411 | case SR_CONF_PATTERN_MODE: | |
412 | if (!probe_group) | |
413 | return SR_ERR_PROBE_GROUP; | |
414 | probe = probe_group->probes->data; | |
415 | if (probe->type == SR_PROBE_LOGIC) { | |
416 | pattern = devc->logic_pattern; | |
417 | *data = g_variant_new_string(logic_pattern_str[pattern]); | |
418 | } else if (probe->type == SR_PROBE_ANALOG) { | |
419 | ag = probe_group->priv; | |
420 | pattern = ag->pattern; | |
421 | *data = g_variant_new_string(analog_pattern_str[pattern]); | |
422 | } else | |
423 | return SR_ERR_BUG; | |
424 | break; | |
425 | case SR_CONF_NUM_LOGIC_PROBES: | |
426 | *data = g_variant_new_int32(devc->num_logic_probes); | |
427 | break; | |
428 | case SR_CONF_NUM_ANALOG_PROBES: | |
429 | *data = g_variant_new_int32(devc->num_analog_probes); | |
430 | break; | |
431 | default: | |
432 | return SR_ERR_NA; | |
433 | } | |
434 | ||
435 | return SR_OK; | |
436 | } | |
437 | ||
438 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, | |
439 | const struct sr_probe_group *probe_group) | |
440 | { | |
441 | struct dev_context *devc; | |
442 | struct analog_gen *ag; | |
443 | struct sr_probe *probe; | |
444 | int pattern, ret; | |
445 | unsigned int i; | |
446 | const char *stropt; | |
447 | ||
448 | devc = sdi->priv; | |
449 | ||
450 | if (sdi->status != SR_ST_ACTIVE) | |
451 | return SR_ERR_DEV_CLOSED; | |
452 | ||
453 | ret = SR_OK; | |
454 | switch (id) { | |
455 | case SR_CONF_SAMPLERATE: | |
456 | devc->cur_samplerate = g_variant_get_uint64(data); | |
457 | sr_dbg("Setting samplerate to %" PRIu64, devc->cur_samplerate); | |
458 | break; | |
459 | case SR_CONF_LIMIT_SAMPLES: | |
460 | devc->limit_msec = 0; | |
461 | devc->limit_samples = g_variant_get_uint64(data); | |
462 | sr_dbg("Setting sample limit to %" PRIu64, devc->limit_samples); | |
463 | break; | |
464 | case SR_CONF_LIMIT_MSEC: | |
465 | devc->limit_msec = g_variant_get_uint64(data); | |
466 | devc->limit_samples = 0; | |
467 | sr_dbg("Setting time limit to %" PRIu64"ms", devc->limit_msec); | |
468 | break; | |
469 | case SR_CONF_PATTERN_MODE: | |
470 | if (!probe_group) | |
471 | return SR_ERR_PROBE_GROUP; | |
472 | stropt = g_variant_get_string(data, NULL); | |
473 | probe = probe_group->probes->data; | |
474 | pattern = -1; | |
475 | if (probe->type == SR_PROBE_LOGIC) { | |
476 | for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { | |
477 | if (!strcmp(stropt, logic_pattern_str[i])) { | |
478 | pattern = i; | |
479 | break; | |
480 | } | |
481 | } | |
482 | if (pattern == -1) | |
483 | return SR_ERR_ARG; | |
484 | devc->logic_pattern = pattern; | |
485 | ||
486 | /* Might as well do this now, these are static. */ | |
487 | if (pattern == PATTERN_ALL_LOW) | |
488 | memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); | |
489 | else if (pattern == PATTERN_ALL_HIGH) | |
490 | memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); | |
491 | sr_dbg("Setting logic pattern to %s", | |
492 | logic_pattern_str[pattern]); | |
493 | } else if (probe->type == SR_PROBE_ANALOG) { | |
494 | for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { | |
495 | if (!strcmp(stropt, analog_pattern_str[i])) { | |
496 | pattern = i; | |
497 | break; | |
498 | } | |
499 | } | |
500 | if (pattern == -1) | |
501 | return SR_ERR_ARG; | |
502 | sr_dbg("Setting analog pattern for probe group %s to %s", | |
503 | probe_group->name, | |
504 | analog_pattern_str[pattern]); | |
505 | ag = probe_group->priv; | |
506 | ag->pattern = pattern; | |
507 | } else | |
508 | return SR_ERR_BUG; | |
509 | break; | |
510 | default: | |
511 | ret = SR_ERR_NA; | |
512 | } | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
517 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, | |
518 | const struct sr_probe_group *probe_group) | |
519 | { | |
520 | struct sr_probe *probe; | |
521 | GVariant *gvar; | |
522 | GVariantBuilder gvb; | |
523 | ||
524 | (void)sdi; | |
525 | ||
526 | if (key == SR_CONF_SCAN_OPTIONS) { | |
527 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
528 | scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t)); | |
529 | return SR_OK; | |
530 | } | |
531 | ||
532 | if (!sdi) | |
533 | return SR_ERR_ARG; | |
534 | ||
535 | if (!probe_group) { | |
536 | switch (key) { | |
537 | case SR_CONF_DEVICE_OPTIONS: | |
538 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
539 | devopts, ARRAY_SIZE(devopts), sizeof(int32_t)); | |
540 | break; | |
541 | case SR_CONF_SAMPLERATE: | |
542 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
543 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, | |
544 | ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
545 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
546 | *data = g_variant_builder_end(&gvb); | |
547 | break; | |
548 | default: | |
549 | return SR_ERR_NA; | |
550 | } | |
551 | } else { | |
552 | probe = probe_group->probes->data; | |
553 | switch (key) { | |
554 | case SR_CONF_DEVICE_OPTIONS: | |
555 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
556 | devopts_pg, ARRAY_SIZE(devopts_pg), sizeof(int32_t)); | |
557 | break; | |
558 | case SR_CONF_PATTERN_MODE: | |
559 | if (probe->type == SR_PROBE_LOGIC) | |
560 | *data = g_variant_new_strv(logic_pattern_str, | |
561 | ARRAY_SIZE(logic_pattern_str)); | |
562 | else if (probe->type == SR_PROBE_ANALOG) | |
563 | *data = g_variant_new_strv(analog_pattern_str, | |
564 | ARRAY_SIZE(analog_pattern_str)); | |
565 | else | |
566 | return SR_ERR_BUG; | |
567 | break; | |
568 | default: | |
569 | return SR_ERR_NA; | |
570 | } | |
571 | } | |
572 | ||
573 | return SR_OK; | |
574 | } | |
575 | ||
576 | static void logic_generator(struct sr_dev_inst *sdi, uint64_t size) | |
577 | { | |
578 | struct dev_context *devc; | |
579 | uint64_t i, j; | |
580 | uint8_t pat; | |
581 | ||
582 | devc = sdi->priv; | |
583 | ||
584 | switch (devc->logic_pattern) { | |
585 | case PATTERN_SIGROK: | |
586 | memset(devc->logic_data, 0x00, size); | |
587 | for (i = 0; i < size; i += devc->logic_unitsize) { | |
588 | for (j = 0; j < devc->logic_unitsize; j++) { | |
589 | pat = pattern_sigrok[(devc->step + j) % sizeof(pattern_sigrok)] >> 1; | |
590 | devc->logic_data[i + j] = ~pat; | |
591 | } | |
592 | devc->step++; | |
593 | } | |
594 | break; | |
595 | case PATTERN_RANDOM: | |
596 | for (i = 0; i < size; i++) | |
597 | devc->logic_data[i] = (uint8_t)(rand() & 0xff); | |
598 | break; | |
599 | case PATTERN_INC: | |
600 | for (i = 0; i < size; i++) { | |
601 | for (j = 0; j < devc->logic_unitsize; j++) { | |
602 | devc->logic_data[i + j] = devc->step; | |
603 | } | |
604 | devc->step++; | |
605 | } | |
606 | break; | |
607 | case PATTERN_ALL_LOW: | |
608 | case PATTERN_ALL_HIGH: | |
609 | /* These were set when the pattern mode was selected. */ | |
610 | break; | |
611 | default: | |
612 | sr_err("Unknown pattern: %d.", devc->logic_pattern); | |
613 | break; | |
614 | } | |
615 | } | |
616 | ||
617 | /* Callback handling data */ | |
618 | static int prepare_data(int fd, int revents, void *cb_data) | |
619 | { | |
620 | struct sr_dev_inst *sdi; | |
621 | struct dev_context *devc; | |
622 | struct sr_datafeed_packet packet; | |
623 | struct sr_datafeed_logic logic; | |
624 | struct sr_probe_group *pg; | |
625 | struct analog_gen *ag; | |
626 | GSList *l; | |
627 | uint64_t samples_to_send, expected_samplenum, analog_samples, sending_now; | |
628 | int64_t time, elapsed; | |
629 | ||
630 | (void)fd; | |
631 | (void)revents; | |
632 | ||
633 | sdi = cb_data; | |
634 | devc = sdi->priv; | |
635 | ||
636 | /* How many "virtual" samples should we have collected by now? */ | |
637 | time = g_get_monotonic_time(); | |
638 | elapsed = time - devc->starttime; | |
639 | expected_samplenum = elapsed * devc->cur_samplerate / 1000000; | |
640 | /* Of those, how many do we still have to send? */ | |
641 | samples_to_send = expected_samplenum - devc->samples_counter; | |
642 | ||
643 | if (devc->limit_samples) { | |
644 | samples_to_send = MIN(samples_to_send, | |
645 | devc->limit_samples - devc->samples_counter); | |
646 | } | |
647 | ||
648 | while (samples_to_send > 0) { | |
649 | sending_now = 0; | |
650 | ||
651 | /* Logic */ | |
652 | if (devc->num_logic_probes > 0) { | |
653 | sending_now = MIN(samples_to_send, | |
654 | LOGIC_BUFSIZE / devc->logic_unitsize); | |
655 | logic_generator(sdi, sending_now * devc->logic_unitsize); | |
656 | packet.type = SR_DF_LOGIC; | |
657 | packet.payload = &logic; | |
658 | logic.length = sending_now * devc->logic_unitsize; | |
659 | logic.unitsize = devc->logic_unitsize; | |
660 | logic.data = devc->logic_data; | |
661 | sr_session_send(sdi, &packet); | |
662 | } | |
663 | ||
664 | /* Analog, one probe at a time */ | |
665 | if (devc->num_analog_probes > 0) { | |
666 | sending_now = 0; | |
667 | for (l = devc->analog_probe_groups; l; l = l->next) { | |
668 | pg = l->data; | |
669 | ag = pg->priv; | |
670 | packet.type = SR_DF_ANALOG; | |
671 | packet.payload = &ag->packet; | |
672 | ||
673 | /* FIXME we should make sure we output a whole | |
674 | * period of data before we send out again the | |
675 | * beginning of our buffer. A ring buffer would | |
676 | * help here as well */ | |
677 | ||
678 | analog_samples = MIN(samples_to_send, ag->num_samples); | |
679 | /* Whichever probe group gets there first. */ | |
680 | sending_now = MAX(sending_now, analog_samples); | |
681 | ag->packet.num_samples = analog_samples; | |
682 | sr_session_send(sdi, &packet); | |
683 | } | |
684 | } | |
685 | ||
686 | samples_to_send -= sending_now; | |
687 | devc->samples_counter += sending_now; | |
688 | } | |
689 | ||
690 | if (devc->limit_samples && | |
691 | devc->samples_counter >= devc->limit_samples) { | |
692 | sr_info("Requested number of samples reached."); | |
693 | dev_acquisition_stop(sdi, cb_data); | |
694 | return TRUE; | |
695 | } | |
696 | ||
697 | return TRUE; | |
698 | } | |
699 | ||
700 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
701 | { | |
702 | GSList *l; | |
703 | struct dev_context *devc; | |
704 | ||
705 | if (sdi->status != SR_ST_ACTIVE) | |
706 | return SR_ERR_DEV_CLOSED; | |
707 | ||
708 | /* TODO: don't start without a sample limit set */ | |
709 | devc = sdi->priv; | |
710 | devc->samples_counter = 0; | |
711 | ||
712 | /* | |
713 | * Setting two channels connected by a pipe is a remnant from when the | |
714 | * demo driver generated data in a thread, and collected and sent the | |
715 | * data in the main program loop. | |
716 | * They are kept here because it provides a convenient way of setting | |
717 | * up a timeout-based polling mechanism. | |
718 | */ | |
719 | if (pipe(devc->pipe_fds)) { | |
720 | sr_err("%s: pipe() failed", __func__); | |
721 | return SR_ERR; | |
722 | } | |
723 | ||
724 | for (l = devc->analog_probe_groups; l; l = l->next) { | |
725 | generate_analog_pattern(l->data, devc->cur_samplerate); | |
726 | } | |
727 | ||
728 | devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]); | |
729 | ||
730 | g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); | |
731 | ||
732 | /* Set channel encoding to binary (default is UTF-8). */ | |
733 | g_io_channel_set_encoding(devc->channel, NULL, NULL); | |
734 | ||
735 | /* Make channels to unbuffered. */ | |
736 | g_io_channel_set_buffered(devc->channel, FALSE); | |
737 | ||
738 | sr_session_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR, | |
739 | 40, prepare_data, (void *)sdi); | |
740 | ||
741 | /* Send header packet to the session bus. */ | |
742 | std_session_send_df_header(cb_data, LOG_PREFIX); | |
743 | ||
744 | /* We use this timestamp to decide how many more samples to send. */ | |
745 | devc->starttime = g_get_monotonic_time(); | |
746 | ||
747 | return SR_OK; | |
748 | } | |
749 | ||
750 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
751 | { | |
752 | struct dev_context *devc; | |
753 | struct sr_datafeed_packet packet; | |
754 | ||
755 | (void)cb_data; | |
756 | ||
757 | devc = sdi->priv; | |
758 | sr_dbg("Stopping aquisition."); | |
759 | ||
760 | sr_session_source_remove_channel(devc->channel); | |
761 | g_io_channel_shutdown(devc->channel, FALSE, NULL); | |
762 | g_io_channel_unref(devc->channel); | |
763 | devc->channel = NULL; | |
764 | ||
765 | /* Send last packet. */ | |
766 | packet.type = SR_DF_END; | |
767 | sr_session_send(sdi, &packet); | |
768 | ||
769 | return SR_OK; | |
770 | } | |
771 | ||
772 | SR_PRIV struct sr_dev_driver demo_driver_info = { | |
773 | .name = "demo", | |
774 | .longname = "Demo driver and pattern generator", | |
775 | .api_version = 1, | |
776 | .init = init, | |
777 | .cleanup = cleanup, | |
778 | .scan = scan, | |
779 | .dev_list = dev_list, | |
780 | .dev_clear = dev_clear, | |
781 | .config_get = config_get, | |
782 | .config_set = config_set, | |
783 | .config_list = config_list, | |
784 | .dev_open = dev_open, | |
785 | .dev_close = dev_close, | |
786 | .dev_acquisition_start = dev_acquisition_start, | |
787 | .dev_acquisition_stop = dev_acquisition_stop, | |
788 | .priv = NULL, | |
789 | }; |