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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 | * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #include <stdlib.h> | |
25 | #include <unistd.h> | |
26 | #include <string.h> | |
27 | #include <math.h> | |
28 | #ifdef _WIN32 | |
29 | #include <io.h> | |
30 | #include <fcntl.h> | |
31 | #define pipe(fds) _pipe(fds, 4096, _O_BINARY) | |
32 | #endif | |
33 | #include "libsigrok.h" | |
34 | #include "libsigrok-internal.h" | |
35 | ||
36 | #define LOG_PREFIX "demo" | |
37 | ||
38 | #define DEFAULT_NUM_LOGIC_CHANNELS 8 | |
39 | #define DEFAULT_NUM_ANALOG_CHANNELS 4 | |
40 | ||
41 | /* The size in bytes of chunks to send through the session bus. */ | |
42 | #define LOGIC_BUFSIZE 4096 | |
43 | /* Size of the analog pattern space per channel. */ | |
44 | #define ANALOG_BUFSIZE 4096 | |
45 | ||
46 | #define DEFAULT_ANALOG_AMPLITUDE 25 | |
47 | #define ANALOG_SAMPLES_PER_PERIOD 20 | |
48 | ||
49 | /* Logic patterns we can generate. */ | |
50 | enum { | |
51 | /** | |
52 | * Spells "sigrok" across 8 channels using '0's (with '1's as | |
53 | * "background") when displayed using the 'bits' output format. | |
54 | * The pattern is repeated every 8 channels, shifted to the right | |
55 | * in time by one bit. | |
56 | */ | |
57 | PATTERN_SIGROK, | |
58 | ||
59 | /** Pseudo-random values on all channels. */ | |
60 | PATTERN_RANDOM, | |
61 | ||
62 | /** | |
63 | * Incrementing number across 8 channels. The pattern is repeated | |
64 | * every 8 channels, shifted to the right in time by one bit. | |
65 | */ | |
66 | PATTERN_INC, | |
67 | ||
68 | /** All channels have a low logic state. */ | |
69 | PATTERN_ALL_LOW, | |
70 | ||
71 | /** All channels have a high logic state. */ | |
72 | PATTERN_ALL_HIGH, | |
73 | }; | |
74 | ||
75 | /* Analog patterns we can generate. */ | |
76 | enum { | |
77 | /** | |
78 | * Square wave. | |
79 | */ | |
80 | PATTERN_SQUARE, | |
81 | PATTERN_SINE, | |
82 | PATTERN_TRIANGLE, | |
83 | PATTERN_SAWTOOTH, | |
84 | }; | |
85 | ||
86 | static const char *logic_pattern_str[] = { | |
87 | "sigrok", | |
88 | "random", | |
89 | "incremental", | |
90 | "all-low", | |
91 | "all-high", | |
92 | }; | |
93 | ||
94 | static const char *analog_pattern_str[] = { | |
95 | "square", | |
96 | "sine", | |
97 | "triangle", | |
98 | "sawtooth", | |
99 | }; | |
100 | ||
101 | struct analog_gen { | |
102 | int pattern; | |
103 | float amplitude; | |
104 | float pattern_data[ANALOG_BUFSIZE]; | |
105 | unsigned int num_samples; | |
106 | struct sr_datafeed_analog packet; | |
107 | float avg_val; /* Average value */ | |
108 | unsigned num_avgs; /* Number of samples averaged */ | |
109 | }; | |
110 | ||
111 | /* Private, per-device-instance driver context. */ | |
112 | struct dev_context { | |
113 | int pipe_fds[2]; | |
114 | GIOChannel *channel; | |
115 | uint64_t cur_samplerate; | |
116 | gboolean continuous; | |
117 | uint64_t limit_samples; | |
118 | uint64_t limit_msec; | |
119 | uint64_t logic_counter; | |
120 | uint64_t analog_counter; | |
121 | int64_t starttime; | |
122 | uint64_t step; | |
123 | /* Logic */ | |
124 | int32_t num_logic_channels; | |
125 | unsigned int logic_unitsize; | |
126 | /* There is only ever one logic channel group, so its pattern goes here. */ | |
127 | uint8_t logic_pattern; | |
128 | unsigned char logic_data[LOGIC_BUFSIZE]; | |
129 | /* Analog */ | |
130 | int32_t num_analog_channels; | |
131 | GHashTable *ch_ag; | |
132 | gboolean avg; /* True if averaging is enabled */ | |
133 | uint64_t avg_samples; | |
134 | }; | |
135 | ||
136 | static const uint32_t drvopts[] = { | |
137 | SR_CONF_DEMO_DEV, | |
138 | SR_CONF_LOGIC_ANALYZER, | |
139 | SR_CONF_OSCILLOSCOPE, | |
140 | }; | |
141 | ||
142 | static const uint32_t scanopts[] = { | |
143 | SR_CONF_NUM_LOGIC_CHANNELS, | |
144 | SR_CONF_NUM_ANALOG_CHANNELS, | |
145 | }; | |
146 | ||
147 | static const uint32_t devopts[] = { | |
148 | SR_CONF_CONTINUOUS | SR_CONF_SET, | |
149 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
150 | SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, | |
151 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
152 | SR_CONF_AVERAGING | SR_CONF_GET | SR_CONF_SET, | |
153 | SR_CONF_AVG_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
154 | }; | |
155 | ||
156 | static const uint32_t devopts_cg_logic[] = { | |
157 | SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
158 | }; | |
159 | ||
160 | static const uint32_t devopts_cg_analog[] = { | |
161 | SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
162 | SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, | |
163 | }; | |
164 | ||
165 | static const uint64_t samplerates[] = { | |
166 | SR_HZ(1), | |
167 | SR_GHZ(1), | |
168 | SR_HZ(1), | |
169 | }; | |
170 | ||
171 | static uint8_t pattern_sigrok[] = { | |
172 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, | |
173 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
174 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
175 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
176 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
177 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
178 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
179 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
180 | }; | |
181 | ||
182 | SR_PRIV struct sr_dev_driver demo_driver_info; | |
183 | ||
184 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
185 | ||
186 | ||
187 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
188 | { | |
189 | return std_init(sr_ctx, di, LOG_PREFIX); | |
190 | } | |
191 | ||
192 | static void generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate) | |
193 | { | |
194 | double t, frequency; | |
195 | float value; | |
196 | unsigned int num_samples, i; | |
197 | int last_end; | |
198 | ||
199 | sr_dbg("Generating %s pattern.", analog_pattern_str[ag->pattern]); | |
200 | ||
201 | num_samples = ANALOG_BUFSIZE / sizeof(float); | |
202 | ||
203 | switch (ag->pattern) { | |
204 | case PATTERN_SQUARE: | |
205 | value = ag->amplitude; | |
206 | last_end = 0; | |
207 | for (i = 0; i < num_samples; i++) { | |
208 | if (i % 5 == 0) | |
209 | value = -value; | |
210 | if (i % 10 == 0) | |
211 | last_end = i; | |
212 | ag->pattern_data[i] = value; | |
213 | } | |
214 | ag->num_samples = last_end; | |
215 | break; | |
216 | ||
217 | case PATTERN_SINE: | |
218 | frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
219 | ||
220 | /* Make sure the number of samples we put out is an integer | |
221 | * multiple of our period size */ | |
222 | /* FIXME we actually need only one period. A ringbuffer would be | |
223 | * usefull here.*/ | |
224 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
225 | num_samples--; | |
226 | ||
227 | for (i = 0; i < num_samples; i++) { | |
228 | t = (double) i / (double) sample_rate; | |
229 | ag->pattern_data[i] = ag->amplitude * | |
230 | sin(2 * M_PI * frequency * t); | |
231 | } | |
232 | ||
233 | ag->num_samples = num_samples; | |
234 | break; | |
235 | ||
236 | case PATTERN_TRIANGLE: | |
237 | frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
238 | ||
239 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
240 | num_samples--; | |
241 | ||
242 | for (i = 0; i < num_samples; i++) { | |
243 | t = (double) i / (double) sample_rate; | |
244 | ag->pattern_data[i] = (2 * ag->amplitude / M_PI) * | |
245 | asin(sin(2 * M_PI * frequency * t)); | |
246 | } | |
247 | ||
248 | ag->num_samples = num_samples; | |
249 | break; | |
250 | ||
251 | case PATTERN_SAWTOOTH: | |
252 | frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD; | |
253 | ||
254 | while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0) | |
255 | num_samples--; | |
256 | ||
257 | for (i = 0; i < num_samples; i++) { | |
258 | t = (double) i / (double) sample_rate; | |
259 | ag->pattern_data[i] = 2 * ag->amplitude * | |
260 | ((t * frequency) - floor(0.5f + t * frequency)); | |
261 | } | |
262 | ||
263 | ag->num_samples = num_samples; | |
264 | break; | |
265 | } | |
266 | } | |
267 | ||
268 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
269 | { | |
270 | struct drv_context *drvc; | |
271 | struct dev_context *devc; | |
272 | struct sr_dev_inst *sdi; | |
273 | struct sr_channel *ch; | |
274 | struct sr_channel_group *cg, *acg; | |
275 | struct sr_config *src; | |
276 | struct analog_gen *ag; | |
277 | GSList *devices, *l; | |
278 | int num_logic_channels, num_analog_channels, pattern, i; | |
279 | char channel_name[16]; | |
280 | ||
281 | drvc = di->priv; | |
282 | ||
283 | num_logic_channels = DEFAULT_NUM_LOGIC_CHANNELS; | |
284 | num_analog_channels = DEFAULT_NUM_ANALOG_CHANNELS; | |
285 | for (l = options; l; l = l->next) { | |
286 | src = l->data; | |
287 | switch (src->key) { | |
288 | case SR_CONF_NUM_LOGIC_CHANNELS: | |
289 | num_logic_channels = g_variant_get_int32(src->data); | |
290 | break; | |
291 | case SR_CONF_NUM_ANALOG_CHANNELS: | |
292 | num_analog_channels = g_variant_get_int32(src->data); | |
293 | break; | |
294 | } | |
295 | } | |
296 | ||
297 | devices = NULL; | |
298 | ||
299 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
300 | sdi->status = SR_ST_ACTIVE; | |
301 | sdi->model = g_strdup("Demo device"); | |
302 | sdi->driver = di; | |
303 | ||
304 | devc = g_malloc(sizeof(struct dev_context)); | |
305 | devc->cur_samplerate = SR_KHZ(200); | |
306 | devc->limit_samples = 0; | |
307 | devc->limit_msec = 0; | |
308 | devc->step = 0; | |
309 | devc->continuous = FALSE; | |
310 | devc->num_logic_channels = num_logic_channels; | |
311 | devc->logic_unitsize = (devc->num_logic_channels + 7) / 8; | |
312 | devc->logic_pattern = PATTERN_SIGROK; | |
313 | devc->num_analog_channels = num_analog_channels; | |
314 | devc->avg = FALSE; | |
315 | devc->avg_samples = 0; | |
316 | ||
317 | /* Logic channels, all in one channel group. */ | |
318 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
319 | cg->name = g_strdup("Logic"); | |
320 | for (i = 0; i < num_logic_channels; i++) { | |
321 | sprintf(channel_name, "D%d", i); | |
322 | ch = sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name); | |
323 | cg->channels = g_slist_append(cg->channels, ch); | |
324 | } | |
325 | sdi->channel_groups = g_slist_append(NULL, cg); | |
326 | ||
327 | /* Analog channels, channel groups and pattern generators. */ | |
328 | pattern = 0; | |
329 | /* An "Analog" channel group with all analog channels in it. */ | |
330 | acg = g_malloc0(sizeof(struct sr_channel_group)); | |
331 | acg->name = g_strdup("Analog"); | |
332 | sdi->channel_groups = g_slist_append(sdi->channel_groups, acg); | |
333 | ||
334 | devc->ch_ag = g_hash_table_new(g_direct_hash, g_direct_equal); | |
335 | for (i = 0; i < num_analog_channels; i++) { | |
336 | snprintf(channel_name, 16, "A%d", i); | |
337 | ch = sr_channel_new(sdi, i + num_logic_channels, SR_CHANNEL_ANALOG, | |
338 | TRUE, channel_name); | |
339 | acg->channels = g_slist_append(acg->channels, ch); | |
340 | ||
341 | /* Every analog channel gets its own channel group as well. */ | |
342 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
343 | cg->name = g_strdup(channel_name); | |
344 | cg->channels = g_slist_append(NULL, ch); | |
345 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
346 | ||
347 | /* Every channel gets a generator struct. */ | |
348 | ag = g_malloc(sizeof(struct analog_gen)); | |
349 | ag->amplitude = DEFAULT_ANALOG_AMPLITUDE; | |
350 | ag->packet.channels = cg->channels; | |
351 | ag->packet.mq = 0; | |
352 | ag->packet.mqflags = 0; | |
353 | ag->packet.unit = SR_UNIT_VOLT; | |
354 | ag->packet.data = ag->pattern_data; | |
355 | ag->pattern = pattern; | |
356 | ag->avg_val = 0.0f; | |
357 | ag->num_avgs = 0; | |
358 | g_hash_table_insert(devc->ch_ag, ch, ag); | |
359 | ||
360 | if (++pattern == ARRAY_SIZE(analog_pattern_str)) | |
361 | pattern = 0; | |
362 | } | |
363 | ||
364 | sdi->priv = devc; | |
365 | devices = g_slist_append(devices, sdi); | |
366 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
367 | ||
368 | return devices; | |
369 | } | |
370 | ||
371 | static GSList *dev_list(const struct sr_dev_driver *di) | |
372 | { | |
373 | return ((struct drv_context *)(di->priv))->instances; | |
374 | } | |
375 | ||
376 | static int dev_open(struct sr_dev_inst *sdi) | |
377 | { | |
378 | sdi->status = SR_ST_ACTIVE; | |
379 | ||
380 | return SR_OK; | |
381 | } | |
382 | ||
383 | static int dev_close(struct sr_dev_inst *sdi) | |
384 | { | |
385 | sdi->status = SR_ST_INACTIVE; | |
386 | ||
387 | return SR_OK; | |
388 | } | |
389 | ||
390 | static void clear_helper(void *priv) | |
391 | { | |
392 | struct dev_context *devc; | |
393 | GHashTableIter iter; | |
394 | void *value; | |
395 | ||
396 | devc = priv; | |
397 | ||
398 | /* Analog generators. */ | |
399 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
400 | while (g_hash_table_iter_next(&iter, NULL, &value)) | |
401 | g_free(value); | |
402 | g_hash_table_unref(devc->ch_ag); | |
403 | g_free(devc); | |
404 | } | |
405 | ||
406 | static int cleanup(const struct sr_dev_driver *di) | |
407 | { | |
408 | return std_dev_clear(di, clear_helper); | |
409 | } | |
410 | ||
411 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
412 | const struct sr_channel_group *cg) | |
413 | { | |
414 | struct dev_context *devc; | |
415 | struct sr_channel *ch; | |
416 | struct analog_gen *ag; | |
417 | int pattern; | |
418 | ||
419 | if (!sdi) | |
420 | return SR_ERR_ARG; | |
421 | ||
422 | devc = sdi->priv; | |
423 | switch (key) { | |
424 | case SR_CONF_SAMPLERATE: | |
425 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
426 | break; | |
427 | case SR_CONF_LIMIT_SAMPLES: | |
428 | *data = g_variant_new_uint64(devc->limit_samples); | |
429 | break; | |
430 | case SR_CONF_LIMIT_MSEC: | |
431 | *data = g_variant_new_uint64(devc->limit_msec); | |
432 | break; | |
433 | case SR_CONF_AVERAGING: | |
434 | *data = g_variant_new_boolean(devc->avg); | |
435 | break; | |
436 | case SR_CONF_AVG_SAMPLES: | |
437 | *data = g_variant_new_uint64(devc->avg_samples); | |
438 | break; | |
439 | case SR_CONF_PATTERN_MODE: | |
440 | if (!cg) | |
441 | return SR_ERR_CHANNEL_GROUP; | |
442 | /* Any channel in the group will do. */ | |
443 | ch = cg->channels->data; | |
444 | if (ch->type == SR_CHANNEL_LOGIC) { | |
445 | pattern = devc->logic_pattern; | |
446 | *data = g_variant_new_string(logic_pattern_str[pattern]); | |
447 | } else if (ch->type == SR_CHANNEL_ANALOG) { | |
448 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
449 | pattern = ag->pattern; | |
450 | *data = g_variant_new_string(analog_pattern_str[pattern]); | |
451 | } else | |
452 | return SR_ERR_BUG; | |
453 | break; | |
454 | case SR_CONF_AMPLITUDE: | |
455 | if (!cg) | |
456 | return SR_ERR_CHANNEL_GROUP; | |
457 | /* Any channel in the group will do. */ | |
458 | ch = cg->channels->data; | |
459 | if (ch->type != SR_CHANNEL_ANALOG) | |
460 | return SR_ERR_ARG; | |
461 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
462 | *data = g_variant_new_double(ag->amplitude); | |
463 | break; | |
464 | default: | |
465 | return SR_ERR_NA; | |
466 | } | |
467 | ||
468 | return SR_OK; | |
469 | } | |
470 | ||
471 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
472 | const struct sr_channel_group *cg) | |
473 | { | |
474 | struct dev_context *devc; | |
475 | struct analog_gen *ag; | |
476 | struct sr_channel *ch; | |
477 | GSList *l; | |
478 | int logic_pattern, analog_pattern, ret; | |
479 | unsigned int i; | |
480 | const char *stropt; | |
481 | ||
482 | devc = sdi->priv; | |
483 | ||
484 | if (sdi->status != SR_ST_ACTIVE) | |
485 | return SR_ERR_DEV_CLOSED; | |
486 | ||
487 | ret = SR_OK; | |
488 | switch (key) { | |
489 | case SR_CONF_SAMPLERATE: | |
490 | devc->cur_samplerate = g_variant_get_uint64(data); | |
491 | sr_dbg("Setting samplerate to %" PRIu64, devc->cur_samplerate); | |
492 | break; | |
493 | case SR_CONF_LIMIT_SAMPLES: | |
494 | devc->limit_msec = 0; | |
495 | devc->limit_samples = g_variant_get_uint64(data); | |
496 | sr_dbg("Setting sample limit to %" PRIu64, devc->limit_samples); | |
497 | break; | |
498 | case SR_CONF_LIMIT_MSEC: | |
499 | devc->limit_msec = g_variant_get_uint64(data); | |
500 | devc->limit_samples = 0; | |
501 | sr_dbg("Setting time limit to %" PRIu64"ms", devc->limit_msec); | |
502 | break; | |
503 | case SR_CONF_AVERAGING: | |
504 | devc->avg = g_variant_get_boolean(data); | |
505 | sr_dbg("%s averaging", devc->avg ? "Enabling" : "Disabling"); | |
506 | break; | |
507 | case SR_CONF_AVG_SAMPLES: | |
508 | devc->avg_samples = g_variant_get_uint64(data); | |
509 | sr_dbg("Setting averaging rate to %" PRIu64, devc->avg_samples); | |
510 | break; | |
511 | case SR_CONF_PATTERN_MODE: | |
512 | if (!cg) | |
513 | return SR_ERR_CHANNEL_GROUP; | |
514 | stropt = g_variant_get_string(data, NULL); | |
515 | logic_pattern = analog_pattern = -1; | |
516 | for (i = 0; i < ARRAY_SIZE(logic_pattern_str); i++) { | |
517 | if (!strcmp(stropt, logic_pattern_str[i])) { | |
518 | logic_pattern = i; | |
519 | break; | |
520 | } | |
521 | } | |
522 | for (i = 0; i < ARRAY_SIZE(analog_pattern_str); i++) { | |
523 | if (!strcmp(stropt, analog_pattern_str[i])) { | |
524 | analog_pattern = i; | |
525 | break; | |
526 | } | |
527 | } | |
528 | if (logic_pattern == -1 && analog_pattern == -1) | |
529 | return SR_ERR_ARG; | |
530 | for (l = cg->channels; l; l = l->next) { | |
531 | ch = l->data; | |
532 | if (ch->type == SR_CHANNEL_LOGIC) { | |
533 | if (logic_pattern == -1) | |
534 | return SR_ERR_ARG; | |
535 | sr_dbg("Setting logic pattern to %s", | |
536 | logic_pattern_str[logic_pattern]); | |
537 | devc->logic_pattern = logic_pattern; | |
538 | /* Might as well do this now, these are static. */ | |
539 | if (logic_pattern == PATTERN_ALL_LOW) | |
540 | memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); | |
541 | else if (logic_pattern == PATTERN_ALL_HIGH) | |
542 | memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); | |
543 | } else if (ch->type == SR_CHANNEL_ANALOG) { | |
544 | if (analog_pattern == -1) | |
545 | return SR_ERR_ARG; | |
546 | sr_dbg("Setting analog pattern for channel %s to %s", | |
547 | ch->name, analog_pattern_str[analog_pattern]); | |
548 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
549 | ag->pattern = analog_pattern; | |
550 | } else | |
551 | return SR_ERR_BUG; | |
552 | } | |
553 | break; | |
554 | case SR_CONF_AMPLITUDE: | |
555 | if (!cg) | |
556 | return SR_ERR_CHANNEL_GROUP; | |
557 | for (l = cg->channels; l; l = l->next) { | |
558 | ch = l->data; | |
559 | if (ch->type != SR_CHANNEL_ANALOG) | |
560 | return SR_ERR_ARG; | |
561 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
562 | ag->amplitude = g_variant_get_double(data); | |
563 | } | |
564 | break; | |
565 | default: | |
566 | ret = SR_ERR_NA; | |
567 | } | |
568 | ||
569 | return ret; | |
570 | } | |
571 | ||
572 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
573 | const struct sr_channel_group *cg) | |
574 | { | |
575 | struct sr_channel *ch; | |
576 | GVariant *gvar; | |
577 | GVariantBuilder gvb; | |
578 | ||
579 | (void)sdi; | |
580 | ||
581 | if (key == SR_CONF_SCAN_OPTIONS) { | |
582 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
583 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
584 | return SR_OK; | |
585 | } | |
586 | ||
587 | if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { | |
588 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
589 | drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); | |
590 | return SR_OK; | |
591 | } | |
592 | ||
593 | if (!sdi) | |
594 | return SR_ERR_ARG; | |
595 | ||
596 | if (!cg) { | |
597 | switch (key) { | |
598 | case SR_CONF_DEVICE_OPTIONS: | |
599 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
600 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
601 | break; | |
602 | case SR_CONF_SAMPLERATE: | |
603 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
604 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, | |
605 | ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
606 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
607 | *data = g_variant_builder_end(&gvb); | |
608 | break; | |
609 | default: | |
610 | return SR_ERR_NA; | |
611 | } | |
612 | } else { | |
613 | /* Any channel in the group will do. */ | |
614 | ch = cg->channels->data; | |
615 | switch (key) { | |
616 | case SR_CONF_DEVICE_OPTIONS: | |
617 | if (ch->type == SR_CHANNEL_LOGIC) | |
618 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
619 | devopts_cg_logic, ARRAY_SIZE(devopts_cg_logic), | |
620 | sizeof(uint32_t)); | |
621 | else if (ch->type == SR_CHANNEL_ANALOG) | |
622 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
623 | devopts_cg_analog, ARRAY_SIZE(devopts_cg_analog), | |
624 | sizeof(uint32_t)); | |
625 | else | |
626 | return SR_ERR_BUG; | |
627 | break; | |
628 | case SR_CONF_PATTERN_MODE: | |
629 | if (ch->type == SR_CHANNEL_LOGIC) | |
630 | *data = g_variant_new_strv(logic_pattern_str, | |
631 | ARRAY_SIZE(logic_pattern_str)); | |
632 | else if (ch->type == SR_CHANNEL_ANALOG) | |
633 | *data = g_variant_new_strv(analog_pattern_str, | |
634 | ARRAY_SIZE(analog_pattern_str)); | |
635 | else | |
636 | return SR_ERR_BUG; | |
637 | break; | |
638 | default: | |
639 | return SR_ERR_NA; | |
640 | } | |
641 | } | |
642 | ||
643 | return SR_OK; | |
644 | } | |
645 | ||
646 | static void logic_generator(struct sr_dev_inst *sdi, uint64_t size) | |
647 | { | |
648 | struct dev_context *devc; | |
649 | uint64_t i, j; | |
650 | uint8_t pat; | |
651 | ||
652 | devc = sdi->priv; | |
653 | ||
654 | switch (devc->logic_pattern) { | |
655 | case PATTERN_SIGROK: | |
656 | memset(devc->logic_data, 0x00, size); | |
657 | for (i = 0; i < size; i += devc->logic_unitsize) { | |
658 | for (j = 0; j < devc->logic_unitsize; j++) { | |
659 | pat = pattern_sigrok[(devc->step + j) % sizeof(pattern_sigrok)] >> 1; | |
660 | devc->logic_data[i + j] = ~pat; | |
661 | } | |
662 | devc->step++; | |
663 | } | |
664 | break; | |
665 | case PATTERN_RANDOM: | |
666 | for (i = 0; i < size; i++) | |
667 | devc->logic_data[i] = (uint8_t)(rand() & 0xff); | |
668 | break; | |
669 | case PATTERN_INC: | |
670 | for (i = 0; i < size; i++) { | |
671 | for (j = 0; j < devc->logic_unitsize; j++) { | |
672 | devc->logic_data[i + j] = devc->step; | |
673 | } | |
674 | devc->step++; | |
675 | } | |
676 | break; | |
677 | case PATTERN_ALL_LOW: | |
678 | case PATTERN_ALL_HIGH: | |
679 | /* These were set when the pattern mode was selected. */ | |
680 | break; | |
681 | default: | |
682 | sr_err("Unknown pattern: %d.", devc->logic_pattern); | |
683 | break; | |
684 | } | |
685 | } | |
686 | ||
687 | static void send_analog_packet(struct analog_gen *ag, | |
688 | struct sr_dev_inst *sdi, | |
689 | uint64_t *analog_sent, | |
690 | uint64_t analog_todo) | |
691 | { | |
692 | struct sr_datafeed_packet packet; | |
693 | struct dev_context *devc; | |
694 | uint64_t sending_now, to_avg; | |
695 | int ag_pattern_pos; | |
696 | unsigned int i; | |
697 | ||
698 | devc = sdi->priv; | |
699 | packet.type = SR_DF_ANALOG; | |
700 | packet.payload = &ag->packet; | |
701 | ||
702 | if (!devc->avg) { | |
703 | ag_pattern_pos = devc->analog_counter % ag->num_samples; | |
704 | sending_now = MIN(analog_todo, ag->num_samples-ag_pattern_pos); | |
705 | ag->packet.data = ag->pattern_data + ag_pattern_pos; | |
706 | ag->packet.num_samples = sending_now; | |
707 | sr_session_send(sdi, &packet); | |
708 | ||
709 | /* Whichever channel group gets there first. */ | |
710 | *analog_sent = MAX(*analog_sent, sending_now); | |
711 | } else { | |
712 | ag_pattern_pos = devc->analog_counter % ag->num_samples; | |
713 | to_avg = MIN(analog_todo, ag->num_samples-ag_pattern_pos); | |
714 | ||
715 | for (i = 0; i < to_avg; i++) { | |
716 | ag->avg_val = (ag->avg_val + | |
717 | *(ag->pattern_data + | |
718 | ag_pattern_pos + i)) / 2; | |
719 | ag->num_avgs++; | |
720 | /* Time to send averaged data? */ | |
721 | if (devc->avg_samples > 0 && | |
722 | ag->num_avgs >= devc->avg_samples) | |
723 | goto do_send; | |
724 | } | |
725 | ||
726 | if (devc->avg_samples == 0) { | |
727 | /* We're averaging all the samples, so wait with | |
728 | * sending until the very end. | |
729 | */ | |
730 | *analog_sent = ag->num_avgs; | |
731 | return; | |
732 | } | |
733 | ||
734 | do_send: | |
735 | ag->packet.data = &ag->avg_val; | |
736 | ag->packet.num_samples = 1; | |
737 | ||
738 | sr_session_send(sdi, &packet); | |
739 | *analog_sent = ag->num_avgs; | |
740 | ||
741 | ag->num_avgs = 0; | |
742 | ag->avg_val = 0.0f; | |
743 | } | |
744 | } | |
745 | ||
746 | /* Callback handling data */ | |
747 | static int prepare_data(int fd, int revents, void *cb_data) | |
748 | { | |
749 | struct sr_dev_inst *sdi; | |
750 | struct dev_context *devc; | |
751 | struct sr_datafeed_packet packet; | |
752 | struct sr_datafeed_logic logic; | |
753 | struct analog_gen *ag; | |
754 | GHashTableIter iter; | |
755 | void *value; | |
756 | uint64_t logic_todo, analog_todo, expected_samplenum, analog_sent, sending_now; | |
757 | int64_t time, elapsed; | |
758 | ||
759 | (void)fd; | |
760 | (void)revents; | |
761 | ||
762 | sdi = cb_data; | |
763 | devc = sdi->priv; | |
764 | logic_todo = analog_todo = 0; | |
765 | ||
766 | /* How many samples should we have sent by now? */ | |
767 | time = g_get_monotonic_time(); | |
768 | elapsed = time - devc->starttime; | |
769 | expected_samplenum = elapsed * devc->cur_samplerate / 1000000; | |
770 | ||
771 | /* But never more than the limit, if there is one. */ | |
772 | if (!devc->continuous) | |
773 | expected_samplenum = MIN(expected_samplenum, devc->limit_samples); | |
774 | ||
775 | /* Of those, how many do we still have to send? */ | |
776 | if (devc->num_logic_channels) | |
777 | logic_todo = expected_samplenum - devc->logic_counter; | |
778 | if (devc->num_analog_channels) | |
779 | analog_todo = expected_samplenum - devc->analog_counter; | |
780 | ||
781 | while (logic_todo || analog_todo) { | |
782 | /* Logic */ | |
783 | if (logic_todo > 0) { | |
784 | sending_now = MIN(logic_todo, LOGIC_BUFSIZE / devc->logic_unitsize); | |
785 | logic_generator(sdi, sending_now * devc->logic_unitsize); | |
786 | packet.type = SR_DF_LOGIC; | |
787 | packet.payload = &logic; | |
788 | logic.length = sending_now * devc->logic_unitsize; | |
789 | logic.unitsize = devc->logic_unitsize; | |
790 | logic.data = devc->logic_data; | |
791 | sr_session_send(sdi, &packet); | |
792 | logic_todo -= sending_now; | |
793 | devc->logic_counter += sending_now; | |
794 | } | |
795 | ||
796 | /* Analog, one channel at a time */ | |
797 | if (analog_todo > 0) { | |
798 | analog_sent = 0; | |
799 | ||
800 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
801 | while (g_hash_table_iter_next(&iter, NULL, &value)) { | |
802 | send_analog_packet(value, sdi, | |
803 | &analog_sent, analog_todo); | |
804 | } | |
805 | analog_todo -= analog_sent; | |
806 | devc->analog_counter += analog_sent; | |
807 | } | |
808 | } | |
809 | ||
810 | if (!devc->continuous | |
811 | && (!devc->num_logic_channels || devc->logic_counter >= devc->limit_samples) | |
812 | && (!devc->num_analog_channels || devc->analog_counter >= devc->limit_samples)) { | |
813 | /* If we're averaging everything - now is the time to send data */ | |
814 | if (devc->avg_samples == 0) { | |
815 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
816 | while (g_hash_table_iter_next(&iter, NULL, &value)) { | |
817 | ag = value; | |
818 | packet.type = SR_DF_ANALOG; | |
819 | packet.payload = &ag->packet; | |
820 | ag->packet.data = &ag->avg_val; | |
821 | ag->packet.num_samples = 1; | |
822 | sr_session_send(sdi, &packet); | |
823 | } | |
824 | } | |
825 | ||
826 | sr_dbg("Requested number of samples reached."); | |
827 | dev_acquisition_stop(sdi, cb_data); | |
828 | return TRUE; | |
829 | } | |
830 | ||
831 | return TRUE; | |
832 | } | |
833 | ||
834 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) | |
835 | { | |
836 | struct dev_context *devc; | |
837 | GHashTableIter iter; | |
838 | void *value; | |
839 | ||
840 | (void)cb_data; | |
841 | ||
842 | if (sdi->status != SR_ST_ACTIVE) | |
843 | return SR_ERR_DEV_CLOSED; | |
844 | ||
845 | devc = sdi->priv; | |
846 | devc->continuous = !devc->limit_samples; | |
847 | devc->logic_counter = devc->analog_counter = 0; | |
848 | ||
849 | /* | |
850 | * Setting two channels connected by a pipe is a remnant from when the | |
851 | * demo driver generated data in a thread, and collected and sent the | |
852 | * data in the main program loop. | |
853 | * They are kept here because it provides a convenient way of setting | |
854 | * up a timeout-based polling mechanism. | |
855 | */ | |
856 | if (pipe(devc->pipe_fds)) { | |
857 | sr_err("%s: pipe() failed", __func__); | |
858 | return SR_ERR; | |
859 | } | |
860 | ||
861 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
862 | while (g_hash_table_iter_next(&iter, NULL, &value)) | |
863 | generate_analog_pattern(value, devc->cur_samplerate); | |
864 | ||
865 | devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]); | |
866 | g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); | |
867 | ||
868 | /* Set channel encoding to binary (default is UTF-8). */ | |
869 | g_io_channel_set_encoding(devc->channel, NULL, NULL); | |
870 | ||
871 | /* Make channels unbuffered. */ | |
872 | g_io_channel_set_buffered(devc->channel, FALSE); | |
873 | ||
874 | sr_session_source_add_channel(sdi->session, devc->channel, | |
875 | G_IO_IN | G_IO_ERR, 40, prepare_data, (void *)sdi); | |
876 | ||
877 | /* Send header packet to the session bus. */ | |
878 | std_session_send_df_header(sdi, LOG_PREFIX); | |
879 | ||
880 | /* We use this timestamp to decide how many more samples to send. */ | |
881 | devc->starttime = g_get_monotonic_time(); | |
882 | ||
883 | return SR_OK; | |
884 | } | |
885 | ||
886 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
887 | { | |
888 | struct dev_context *devc; | |
889 | struct sr_datafeed_packet packet; | |
890 | ||
891 | (void)cb_data; | |
892 | ||
893 | devc = sdi->priv; | |
894 | sr_dbg("Stopping acquisition."); | |
895 | ||
896 | sr_session_source_remove_channel(sdi->session, devc->channel); | |
897 | g_io_channel_shutdown(devc->channel, FALSE, NULL); | |
898 | g_io_channel_unref(devc->channel); | |
899 | devc->channel = NULL; | |
900 | ||
901 | /* Send last packet. */ | |
902 | packet.type = SR_DF_END; | |
903 | sr_session_send(sdi, &packet); | |
904 | ||
905 | return SR_OK; | |
906 | } | |
907 | ||
908 | SR_PRIV struct sr_dev_driver demo_driver_info = { | |
909 | .name = "demo", | |
910 | .longname = "Demo driver and pattern generator", | |
911 | .api_version = 1, | |
912 | .init = init, | |
913 | .cleanup = cleanup, | |
914 | .scan = scan, | |
915 | .dev_list = dev_list, | |
916 | .dev_clear = NULL, | |
917 | .config_get = config_get, | |
918 | .config_set = config_set, | |
919 | .config_list = config_list, | |
920 | .dev_open = dev_open, | |
921 | .dev_close = dev_close, | |
922 | .dev_acquisition_start = dev_acquisition_start, | |
923 | .dev_acquisition_stop = dev_acquisition_stop, | |
924 | .priv = NULL, | |
925 | }; |