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