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