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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_CHANNELS 8 | |
38 | #define DEFAULT_NUM_ANALOG_CHANNELS 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 DEFAULT_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 channels using '0's (with '1's as | |
52 | * "background") when displayed using the 'bits' output format. | |
53 | * The pattern is repeated every 8 channels, shifted to the right | |
54 | * in time by one bit. | |
55 | */ | |
56 | PATTERN_SIGROK, | |
57 | ||
58 | /** Pseudo-random values on all channels. */ | |
59 | PATTERN_RANDOM, | |
60 | ||
61 | /** | |
62 | * Incrementing number across 8 channels. The pattern is repeated | |
63 | * every 8 channels, shifted to the right in time by one bit. | |
64 | */ | |
65 | PATTERN_INC, | |
66 | ||
67 | /** All channels have a low logic state. */ | |
68 | PATTERN_ALL_LOW, | |
69 | ||
70 | /** All channels 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 amplitude; | |
103 | float pattern_data[ANALOG_BUFSIZE]; | |
104 | unsigned int num_samples; | |
105 | struct sr_datafeed_analog packet; | |
106 | }; | |
107 | ||
108 | /* Private, per-device-instance driver context. */ | |
109 | struct dev_context { | |
110 | int pipe_fds[2]; | |
111 | GIOChannel *channel; | |
112 | uint64_t cur_samplerate; | |
113 | gboolean continuous; | |
114 | uint64_t limit_samples; | |
115 | uint64_t limit_msec; | |
116 | uint64_t logic_counter; | |
117 | uint64_t analog_counter; | |
118 | int64_t starttime; | |
119 | uint64_t step; | |
120 | /* Logic */ | |
121 | int32_t num_logic_channels; | |
122 | unsigned int logic_unitsize; | |
123 | /* There is only ever one logic channel group, so its pattern goes here. */ | |
124 | uint8_t logic_pattern; | |
125 | unsigned char logic_data[LOGIC_BUFSIZE]; | |
126 | /* Analog */ | |
127 | int32_t num_analog_channels; | |
128 | GHashTable *ch_ag; | |
129 | }; | |
130 | ||
131 | static const uint32_t scanopts[] = { | |
132 | SR_CONF_NUM_LOGIC_CHANNELS, | |
133 | SR_CONF_NUM_ANALOG_CHANNELS, | |
134 | }; | |
135 | ||
136 | static const uint32_t devopts[] = { | |
137 | SR_CONF_DEMO_DEV, | |
138 | SR_CONF_LOGIC_ANALYZER, | |
139 | SR_CONF_OSCILLOSCOPE, | |
140 | SR_CONF_CONTINUOUS, | |
141 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
142 | SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, | |
143 | }; | |
144 | ||
145 | static const uint32_t devopts_global[] = { | |
146 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
147 | }; | |
148 | ||
149 | static const uint32_t devopts_cg_logic[] = { | |
150 | SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
151 | }; | |
152 | ||
153 | static const uint32_t devopts_cg_analog[] = { | |
154 | SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
155 | SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, | |
156 | }; | |
157 | ||
158 | static const uint64_t samplerates[] = { | |
159 | SR_HZ(1), | |
160 | SR_GHZ(1), | |
161 | SR_HZ(1), | |
162 | }; | |
163 | ||
164 | static uint8_t pattern_sigrok[] = { | |
165 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, | |
166 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
167 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
168 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
169 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
170 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
171 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
172 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
173 | }; | |
174 | ||
175 | SR_PRIV struct sr_dev_driver demo_driver_info; | |
176 | static struct sr_dev_driver *di = &demo_driver_info; | |
177 | ||
178 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
179 | ||
180 | ||
181 | static int init(struct sr_context *sr_ctx) | |
182 | { | |
183 | return std_init(sr_ctx, di, LOG_PREFIX); | |
184 | } | |
185 | ||
186 | static void generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate) | |
187 | { | |
188 | double t, frequency; | |
189 | float value; | |
190 | unsigned int num_samples, i; | |
191 | int last_end; | |
192 | ||
193 | sr_dbg("Generating %s pattern.", analog_pattern_str[ag->pattern]); | |
194 | ||
195 | num_samples = ANALOG_BUFSIZE / sizeof(float); | |
196 | ||
197 | switch (ag->pattern) { | |
198 | case PATTERN_SQUARE: | |
199 | value = ag->amplitude; | |
200 | last_end = 0; | |
201 | for (i = 0; i < num_samples; i++) { | |
202 | if (i % 5 == 0) | |
203 | value = -value; | |
204 | if (i % 10 == 0) | |
205 | last_end = i; | |
206 | ag->pattern_data[i] = value; | |
207 | } | |
208 | ag->num_samples = last_end; | |
209 | break; | |
210 | ||
211 | case PATTERN_SINE: | |
212 | frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
213 | ||
214 | /* Make sure the number of samples we put out is an integer | |
215 | * multiple of our period size */ | |
216 | /* FIXME we actually need only one period. A ringbuffer would be | |
217 | * usefull here.*/ | |
218 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
219 | num_samples--; | |
220 | ||
221 | for (i = 0; i < num_samples; i++) { | |
222 | t = (double) i / (double) sample_rate; | |
223 | ag->pattern_data[i] = ag->amplitude * | |
224 | sin(2 * M_PI * frequency * t); | |
225 | } | |
226 | ||
227 | ag->num_samples = num_samples; | |
228 | break; | |
229 | ||
230 | case PATTERN_TRIANGLE: | |
231 | frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
232 | ||
233 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
234 | num_samples--; | |
235 | ||
236 | for (i = 0; i < num_samples; i++) { | |
237 | t = (double) i / (double) sample_rate; | |
238 | ag->pattern_data[i] = (2 * ag->amplitude / M_PI) * | |
239 | asin(sin(2 * M_PI * frequency * t)); | |
240 | } | |
241 | ||
242 | ag->num_samples = num_samples; | |
243 | break; | |
244 | ||
245 | case PATTERN_SAWTOOTH: | |
246 | frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
247 | ||
248 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
249 | num_samples--; | |
250 | ||
251 | for (i = 0; i < num_samples; i++) { | |
252 | t = (double) i / (double) sample_rate; | |
253 | ag->pattern_data[i] = 2 * ag->amplitude * | |
254 | ((t * frequency) - floor(0.5f + t * frequency)); | |
255 | } | |
256 | ||
257 | ag->num_samples = num_samples; | |
258 | break; | |
259 | } | |
260 | } | |
261 | ||
262 | static GSList *scan(GSList *options) | |
263 | { | |
264 | struct drv_context *drvc; | |
265 | struct dev_context *devc; | |
266 | struct sr_dev_inst *sdi; | |
267 | struct sr_channel *ch; | |
268 | struct sr_channel_group *cg, *acg; | |
269 | struct sr_config *src; | |
270 | struct analog_gen *ag; | |
271 | GSList *devices, *l; | |
272 | int num_logic_channels, num_analog_channels, pattern, i; | |
273 | char channel_name[16]; | |
274 | ||
275 | drvc = di->priv; | |
276 | ||
277 | num_logic_channels = DEFAULT_NUM_LOGIC_CHANNELS; | |
278 | num_analog_channels = DEFAULT_NUM_ANALOG_CHANNELS; | |
279 | for (l = options; l; l = l->next) { | |
280 | src = l->data; | |
281 | switch (src->key) { | |
282 | case SR_CONF_NUM_LOGIC_CHANNELS: | |
283 | num_logic_channels = g_variant_get_int32(src->data); | |
284 | break; | |
285 | case SR_CONF_NUM_ANALOG_CHANNELS: | |
286 | num_analog_channels = g_variant_get_int32(src->data); | |
287 | break; | |
288 | } | |
289 | } | |
290 | ||
291 | devices = NULL; | |
292 | ||
293 | sdi = sr_dev_inst_new(); | |
294 | sdi->status = SR_ST_ACTIVE; | |
295 | sdi->model = g_strdup("Demo device"); | |
296 | sdi->driver = di; | |
297 | ||
298 | devc = g_malloc(sizeof(struct dev_context)); | |
299 | devc->cur_samplerate = SR_KHZ(200); | |
300 | devc->limit_samples = 0; | |
301 | devc->limit_msec = 0; | |
302 | devc->step = 0; | |
303 | devc->continuous = FALSE; | |
304 | devc->num_logic_channels = num_logic_channels; | |
305 | devc->logic_unitsize = (devc->num_logic_channels + 7) / 8; | |
306 | devc->logic_pattern = PATTERN_SIGROK; | |
307 | devc->num_analog_channels = num_analog_channels; | |
308 | ||
309 | /* Logic channels, all in one channel group. */ | |
310 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
311 | cg->name = g_strdup("Logic"); | |
312 | for (i = 0; i < num_logic_channels; i++) { | |
313 | sprintf(channel_name, "D%d", i); | |
314 | if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, channel_name))) | |
315 | return NULL; | |
316 | sdi->channels = g_slist_append(sdi->channels, ch); | |
317 | cg->channels = g_slist_append(cg->channels, ch); | |
318 | } | |
319 | sdi->channel_groups = g_slist_append(NULL, cg); | |
320 | ||
321 | /* Analog channels, channel groups and pattern generators. */ | |
322 | pattern = 0; | |
323 | /* An "Analog" channel group with all analog channels in it. */ | |
324 | acg = g_malloc0(sizeof(struct sr_channel_group)); | |
325 | acg->name = g_strdup("Analog"); | |
326 | sdi->channel_groups = g_slist_append(sdi->channel_groups, acg); | |
327 | ||
328 | devc->ch_ag = g_hash_table_new(g_direct_hash, g_direct_equal); | |
329 | for (i = 0; i < num_analog_channels; i++) { | |
330 | snprintf(channel_name, 16, "A%d", i); | |
331 | ch = sr_channel_new(i + num_logic_channels, SR_CHANNEL_ANALOG, | |
332 | TRUE, channel_name); | |
333 | sdi->channels = g_slist_append(sdi->channels, ch); | |
334 | acg->channels = g_slist_append(acg->channels, ch); | |
335 | ||
336 | /* Every analog channel gets its own channel group as well. */ | |
337 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
338 | cg->name = g_strdup(channel_name); | |
339 | cg->channels = g_slist_append(NULL, ch); | |
340 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
341 | ||
342 | /* Every channel gets a generator struct. */ | |
343 | ag = g_malloc(sizeof(struct analog_gen)); | |
344 | ag->amplitude = DEFAULT_ANALOG_AMPLITUDE; | |
345 | ag->packet.channels = cg->channels; | |
346 | ag->packet.mq = 0; | |
347 | ag->packet.mqflags = 0; | |
348 | ag->packet.unit = SR_UNIT_VOLT; | |
349 | ag->packet.data = ag->pattern_data; | |
350 | ag->pattern = pattern; | |
351 | g_hash_table_insert(devc->ch_ag, ch, ag); | |
352 | ||
353 | if (++pattern == ARRAY_SIZE(analog_pattern_str)) | |
354 | pattern = 0; | |
355 | } | |
356 | ||
357 | sdi->priv = devc; | |
358 | devices = g_slist_append(devices, sdi); | |
359 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
360 | ||
361 | return devices; | |
362 | } | |
363 | ||
364 | static GSList *dev_list(void) | |
365 | { | |
366 | return ((struct drv_context *)(di->priv))->instances; | |
367 | } | |
368 | ||
369 | static int dev_open(struct sr_dev_inst *sdi) | |
370 | { | |
371 | sdi->status = SR_ST_ACTIVE; | |
372 | ||
373 | return SR_OK; | |
374 | } | |
375 | ||
376 | static int dev_close(struct sr_dev_inst *sdi) | |
377 | { | |
378 | sdi->status = SR_ST_INACTIVE; | |
379 | ||
380 | return SR_OK; | |
381 | } | |
382 | ||
383 | static void clear_helper(void *priv) | |
384 | { | |
385 | struct dev_context *devc; | |
386 | GHashTableIter iter; | |
387 | void *value; | |
388 | ||
389 | devc = priv; | |
390 | ||
391 | /* Analog generators. */ | |
392 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
393 | while (g_hash_table_iter_next(&iter, NULL, &value)) | |
394 | g_free(value); | |
395 | g_hash_table_unref(devc->ch_ag); | |
396 | g_free(devc); | |
397 | } | |
398 | ||
399 | static int cleanup(void) | |
400 | { | |
401 | return std_dev_clear(di, clear_helper); | |
402 | } | |
403 | ||
404 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
405 | const struct sr_channel_group *cg) | |
406 | { | |
407 | struct dev_context *devc; | |
408 | struct sr_channel *ch; | |
409 | struct analog_gen *ag; | |
410 | int pattern; | |
411 | ||
412 | if (!sdi) | |
413 | return SR_ERR_ARG; | |
414 | ||
415 | devc = sdi->priv; | |
416 | switch (key) { | |
417 | case SR_CONF_SAMPLERATE: | |
418 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
419 | break; | |
420 | case SR_CONF_LIMIT_SAMPLES: | |
421 | *data = g_variant_new_uint64(devc->limit_samples); | |
422 | break; | |
423 | case SR_CONF_LIMIT_MSEC: | |
424 | *data = g_variant_new_uint64(devc->limit_msec); | |
425 | break; | |
426 | case SR_CONF_PATTERN_MODE: | |
427 | if (!cg) | |
428 | return SR_ERR_CHANNEL_GROUP; | |
429 | /* Any channel in the group will do. */ | |
430 | ch = cg->channels->data; | |
431 | if (ch->type == SR_CHANNEL_LOGIC) { | |
432 | pattern = devc->logic_pattern; | |
433 | *data = g_variant_new_string(logic_pattern_str[pattern]); | |
434 | } else if (ch->type == SR_CHANNEL_ANALOG) { | |
435 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
436 | pattern = ag->pattern; | |
437 | *data = g_variant_new_string(analog_pattern_str[pattern]); | |
438 | } else | |
439 | return SR_ERR_BUG; | |
440 | break; | |
441 | case SR_CONF_AMPLITUDE: | |
442 | if (!cg) | |
443 | return SR_ERR_CHANNEL_GROUP; | |
444 | /* Any channel in the group will do. */ | |
445 | ch = cg->channels->data; | |
446 | if (ch->type != SR_CHANNEL_ANALOG) | |
447 | return SR_ERR_ARG; | |
448 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
449 | *data = g_variant_new_double(ag->amplitude); | |
450 | break; | |
451 | default: | |
452 | return SR_ERR_NA; | |
453 | } | |
454 | ||
455 | return SR_OK; | |
456 | } | |
457 | ||
458 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
459 | const struct sr_channel_group *cg) | |
460 | { | |
461 | struct dev_context *devc; | |
462 | struct analog_gen *ag; | |
463 | struct sr_channel *ch; | |
464 | GSList *l; | |
465 | int logic_pattern, analog_pattern, ret; | |
466 | unsigned int i; | |
467 | const char *stropt; | |
468 | ||
469 | devc = sdi->priv; | |
470 | ||
471 | if (sdi->status != SR_ST_ACTIVE) | |
472 | return SR_ERR_DEV_CLOSED; | |
473 | ||
474 | ret = SR_OK; | |
475 | switch (key) { | |
476 | case SR_CONF_SAMPLERATE: | |
477 | devc->cur_samplerate = g_variant_get_uint64(data); | |
478 | sr_dbg("Setting samplerate to %" PRIu64, devc->cur_samplerate); | |
479 | break; | |
480 | case SR_CONF_LIMIT_SAMPLES: | |
481 | devc->limit_msec = 0; | |
482 | devc->limit_samples = g_variant_get_uint64(data); | |
483 | sr_dbg("Setting sample limit to %" PRIu64, devc->limit_samples); | |
484 | break; | |
485 | case SR_CONF_LIMIT_MSEC: | |
486 | devc->limit_msec = g_variant_get_uint64(data); | |
487 | devc->limit_samples = 0; | |
488 | sr_dbg("Setting time limit to %" PRIu64"ms", devc->limit_msec); | |
489 | break; | |
490 | case SR_CONF_PATTERN_MODE: | |
491 | if (!cg) | |
492 | return SR_ERR_CHANNEL_GROUP; | |
493 | stropt = g_variant_get_string(data, NULL); | |
494 | logic_pattern = analog_pattern = -1; | |
495 | for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { | |
496 | if (!strcmp(stropt, logic_pattern_str[i])) { | |
497 | logic_pattern = i; | |
498 | break; | |
499 | } | |
500 | } | |
501 | for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { | |
502 | if (!strcmp(stropt, analog_pattern_str[i])) { | |
503 | analog_pattern = i; | |
504 | break; | |
505 | } | |
506 | } | |
507 | if (logic_pattern == -1 && analog_pattern == -1) | |
508 | return SR_ERR_ARG; | |
509 | for (l = cg->channels; l; l = l->next) { | |
510 | ch = l->data; | |
511 | if (ch->type == SR_CHANNEL_LOGIC) { | |
512 | if (logic_pattern == -1) | |
513 | return SR_ERR_ARG; | |
514 | sr_dbg("Setting logic pattern to %s", | |
515 | logic_pattern_str[logic_pattern]); | |
516 | devc->logic_pattern = logic_pattern; | |
517 | /* Might as well do this now, these are static. */ | |
518 | if (logic_pattern == PATTERN_ALL_LOW) | |
519 | memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); | |
520 | else if (logic_pattern == PATTERN_ALL_HIGH) | |
521 | memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); | |
522 | } else if (ch->type == SR_CHANNEL_ANALOG) { | |
523 | if (analog_pattern == -1) | |
524 | return SR_ERR_ARG; | |
525 | sr_dbg("Setting analog pattern for channel %s to %s", | |
526 | ch->name, analog_pattern_str[analog_pattern]); | |
527 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
528 | ag->pattern = analog_pattern; | |
529 | } else | |
530 | return SR_ERR_BUG; | |
531 | } | |
532 | break; | |
533 | case SR_CONF_AMPLITUDE: | |
534 | if (!cg) | |
535 | return SR_ERR_CHANNEL_GROUP; | |
536 | for (l = cg->channels; l; l = l->next) { | |
537 | ch = l->data; | |
538 | if (ch->type != SR_CHANNEL_ANALOG) | |
539 | return SR_ERR_ARG; | |
540 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
541 | ag->amplitude = g_variant_get_double(data); | |
542 | } | |
543 | break; | |
544 | default: | |
545 | ret = SR_ERR_NA; | |
546 | } | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
551 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
552 | const struct sr_channel_group *cg) | |
553 | { | |
554 | struct sr_channel *ch; | |
555 | GVariant *gvar; | |
556 | GVariantBuilder gvb; | |
557 | ||
558 | (void)sdi; | |
559 | ||
560 | if (key == SR_CONF_SCAN_OPTIONS) { | |
561 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
562 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
563 | return SR_OK; | |
564 | } | |
565 | ||
566 | if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { | |
567 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
568 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
569 | return SR_OK; | |
570 | } | |
571 | ||
572 | if (!sdi) | |
573 | return SR_ERR_ARG; | |
574 | ||
575 | if (!cg) { | |
576 | switch (key) { | |
577 | case SR_CONF_DEVICE_OPTIONS: | |
578 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
579 | devopts_global, ARRAY_SIZE(devopts_global), sizeof(uint32_t)); | |
580 | break; | |
581 | case SR_CONF_SAMPLERATE: | |
582 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
583 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, | |
584 | ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
585 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
586 | *data = g_variant_builder_end(&gvb); | |
587 | break; | |
588 | default: | |
589 | return SR_ERR_NA; | |
590 | } | |
591 | } else { | |
592 | /* Any channel in the group will do. */ | |
593 | ch = cg->channels->data; | |
594 | switch (key) { | |
595 | case SR_CONF_DEVICE_OPTIONS: | |
596 | if (ch->type == SR_CHANNEL_LOGIC) | |
597 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
598 | devopts_cg_logic, ARRAY_SIZE(devopts_cg_logic), | |
599 | sizeof(uint32_t)); | |
600 | else if (ch->type == SR_CHANNEL_ANALOG) | |
601 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
602 | devopts_cg_analog, ARRAY_SIZE(devopts_cg_analog), | |
603 | sizeof(uint32_t)); | |
604 | else | |
605 | return SR_ERR_BUG; | |
606 | break; | |
607 | case SR_CONF_PATTERN_MODE: | |
608 | if (ch->type == SR_CHANNEL_LOGIC) | |
609 | *data = g_variant_new_strv(logic_pattern_str, | |
610 | ARRAY_SIZE(logic_pattern_str)); | |
611 | else if (ch->type == SR_CHANNEL_ANALOG) | |
612 | *data = g_variant_new_strv(analog_pattern_str, | |
613 | ARRAY_SIZE(analog_pattern_str)); | |
614 | else | |
615 | return SR_ERR_BUG; | |
616 | break; | |
617 | default: | |
618 | return SR_ERR_NA; | |
619 | } | |
620 | } | |
621 | ||
622 | return SR_OK; | |
623 | } | |
624 | ||
625 | static void logic_generator(struct sr_dev_inst *sdi, uint64_t size) | |
626 | { | |
627 | struct dev_context *devc; | |
628 | uint64_t i, j; | |
629 | uint8_t pat; | |
630 | ||
631 | devc = sdi->priv; | |
632 | ||
633 | switch (devc->logic_pattern) { | |
634 | case PATTERN_SIGROK: | |
635 | memset(devc->logic_data, 0x00, size); | |
636 | for (i = 0; i < size; i += devc->logic_unitsize) { | |
637 | for (j = 0; j < devc->logic_unitsize; j++) { | |
638 | pat = pattern_sigrok[(devc->step + j) % sizeof(pattern_sigrok)] >> 1; | |
639 | devc->logic_data[i + j] = ~pat; | |
640 | } | |
641 | devc->step++; | |
642 | } | |
643 | break; | |
644 | case PATTERN_RANDOM: | |
645 | for (i = 0; i < size; i++) | |
646 | devc->logic_data[i] = (uint8_t)(rand() & 0xff); | |
647 | break; | |
648 | case PATTERN_INC: | |
649 | for (i = 0; i < size; i++) { | |
650 | for (j = 0; j < devc->logic_unitsize; j++) { | |
651 | devc->logic_data[i + j] = devc->step; | |
652 | } | |
653 | devc->step++; | |
654 | } | |
655 | break; | |
656 | case PATTERN_ALL_LOW: | |
657 | case PATTERN_ALL_HIGH: | |
658 | /* These were set when the pattern mode was selected. */ | |
659 | break; | |
660 | default: | |
661 | sr_err("Unknown pattern: %d.", devc->logic_pattern); | |
662 | break; | |
663 | } | |
664 | } | |
665 | ||
666 | /* Callback handling data */ | |
667 | static int prepare_data(int fd, int revents, void *cb_data) | |
668 | { | |
669 | struct sr_dev_inst *sdi; | |
670 | struct dev_context *devc; | |
671 | struct sr_datafeed_packet packet; | |
672 | struct sr_datafeed_logic logic; | |
673 | struct analog_gen *ag; | |
674 | GHashTableIter iter; | |
675 | void *value; | |
676 | uint64_t logic_todo, analog_todo, expected_samplenum, analog_sent, sending_now; | |
677 | int64_t time, elapsed; | |
678 | ||
679 | (void)fd; | |
680 | (void)revents; | |
681 | ||
682 | sdi = cb_data; | |
683 | devc = sdi->priv; | |
684 | logic_todo = analog_todo = 0; | |
685 | ||
686 | /* How many samples should we have sent by now? */ | |
687 | time = g_get_monotonic_time(); | |
688 | elapsed = time - devc->starttime; | |
689 | expected_samplenum = elapsed * devc->cur_samplerate / 1000000; | |
690 | ||
691 | /* But never more than the limit, if there is one. */ | |
692 | if (!devc->continuous) | |
693 | expected_samplenum = MIN(expected_samplenum, devc->limit_samples); | |
694 | ||
695 | /* Of those, how many do we still have to send? */ | |
696 | if (devc->num_logic_channels) | |
697 | logic_todo = expected_samplenum - devc->logic_counter; | |
698 | if (devc->num_analog_channels) | |
699 | analog_todo = expected_samplenum - devc->analog_counter; | |
700 | ||
701 | while (logic_todo || analog_todo) { | |
702 | /* Logic */ | |
703 | if (logic_todo > 0) { | |
704 | sending_now = MIN(logic_todo, LOGIC_BUFSIZE / devc->logic_unitsize); | |
705 | logic_generator(sdi, sending_now * devc->logic_unitsize); | |
706 | packet.type = SR_DF_LOGIC; | |
707 | packet.payload = &logic; | |
708 | logic.length = sending_now * devc->logic_unitsize; | |
709 | logic.unitsize = devc->logic_unitsize; | |
710 | logic.data = devc->logic_data; | |
711 | sr_session_send(sdi, &packet); | |
712 | logic_todo -= sending_now; | |
713 | devc->logic_counter += sending_now; | |
714 | } | |
715 | ||
716 | /* Analog, one channel at a time */ | |
717 | if (analog_todo > 0) { | |
718 | analog_sent = 0; | |
719 | ||
720 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
721 | while (g_hash_table_iter_next(&iter, NULL, &value)) { | |
722 | ag = value; | |
723 | packet.type = SR_DF_ANALOG; | |
724 | packet.payload = &ag->packet; | |
725 | ||
726 | /* FIXME we should make sure we output a whole | |
727 | * period of data before we send out again the | |
728 | * beginning of our buffer. A ring buffer would | |
729 | * help here as well */ | |
730 | ||
731 | sending_now = MIN(analog_todo, ag->num_samples); | |
732 | ag->packet.num_samples = sending_now; | |
733 | sr_session_send(sdi, &packet); | |
734 | ||
735 | /* Whichever channel group gets there first. */ | |
736 | analog_sent = MAX(analog_sent, sending_now); | |
737 | } | |
738 | analog_todo -= analog_sent; | |
739 | devc->analog_counter += analog_sent; | |
740 | } | |
741 | } | |
742 | ||
743 | if (!devc->continuous | |
744 | && (!devc->num_logic_channels || devc->logic_counter >= devc->limit_samples) | |
745 | && (!devc->num_analog_channels || devc->analog_counter >= devc->limit_samples)) { | |
746 | sr_dbg("Requested number of samples reached."); | |
747 | dev_acquisition_stop(sdi, cb_data); | |
748 | return TRUE; | |
749 | } | |
750 | ||
751 | return TRUE; | |
752 | } | |
753 | ||
754 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
755 | { | |
756 | struct dev_context *devc; | |
757 | GHashTableIter iter; | |
758 | void *value; | |
759 | ||
760 | (void)cb_data; | |
761 | ||
762 | if (sdi->status != SR_ST_ACTIVE) | |
763 | return SR_ERR_DEV_CLOSED; | |
764 | ||
765 | devc = sdi->priv; | |
766 | devc->continuous = !devc->limit_samples; | |
767 | devc->logic_counter = devc->analog_counter = 0; | |
768 | ||
769 | /* | |
770 | * Setting two channels connected by a pipe is a remnant from when the | |
771 | * demo driver generated data in a thread, and collected and sent the | |
772 | * data in the main program loop. | |
773 | * They are kept here because it provides a convenient way of setting | |
774 | * up a timeout-based polling mechanism. | |
775 | */ | |
776 | if (pipe(devc->pipe_fds)) { | |
777 | sr_err("%s: pipe() failed", __func__); | |
778 | return SR_ERR; | |
779 | } | |
780 | ||
781 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
782 | while (g_hash_table_iter_next(&iter, NULL, &value)) | |
783 | generate_analog_pattern(value, devc->cur_samplerate); | |
784 | ||
785 | devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]); | |
786 | g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); | |
787 | ||
788 | /* Set channel encoding to binary (default is UTF-8). */ | |
789 | g_io_channel_set_encoding(devc->channel, NULL, NULL); | |
790 | ||
791 | /* Make channels unbuffered. */ | |
792 | g_io_channel_set_buffered(devc->channel, FALSE); | |
793 | ||
794 | sr_session_source_add_channel(sdi->session, devc->channel, | |
795 | G_IO_IN | G_IO_ERR, 40, prepare_data, (void *)sdi); | |
796 | ||
797 | /* Send header packet to the session bus. */ | |
798 | std_session_send_df_header(sdi, LOG_PREFIX); | |
799 | ||
800 | /* We use this timestamp to decide how many more samples to send. */ | |
801 | devc->starttime = g_get_monotonic_time(); | |
802 | ||
803 | return SR_OK; | |
804 | } | |
805 | ||
806 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
807 | { | |
808 | struct dev_context *devc; | |
809 | struct sr_datafeed_packet packet; | |
810 | ||
811 | (void)cb_data; | |
812 | ||
813 | devc = sdi->priv; | |
814 | sr_dbg("Stopping acquisition."); | |
815 | ||
816 | sr_session_source_remove_channel(sdi->session, devc->channel); | |
817 | g_io_channel_shutdown(devc->channel, FALSE, NULL); | |
818 | g_io_channel_unref(devc->channel); | |
819 | devc->channel = NULL; | |
820 | ||
821 | /* Send last packet. */ | |
822 | packet.type = SR_DF_END; | |
823 | sr_session_send(sdi, &packet); | |
824 | ||
825 | return SR_OK; | |
826 | } | |
827 | ||
828 | SR_PRIV struct sr_dev_driver demo_driver_info = { | |
829 | .name = "demo", | |
830 | .longname = "Demo driver and pattern generator", | |
831 | .api_version = 1, | |
832 | .init = init, | |
833 | .cleanup = cleanup, | |
834 | .scan = scan, | |
835 | .dev_list = dev_list, | |
836 | .dev_clear = NULL, | |
837 | .config_get = config_get, | |
838 | .config_set = config_set, | |
839 | .config_list = config_list, | |
840 | .dev_open = dev_open, | |
841 | .dev_close = dev_close, | |
842 | .dev_acquisition_start = dev_acquisition_start, | |
843 | .dev_acquisition_stop = dev_acquisition_stop, | |
844 | .priv = NULL, | |
845 | }; |