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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, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
23 | #include <config.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <math.h> | |
27 | #include <libsigrok/libsigrok.h> | |
28 | #include "libsigrok-internal.h" | |
29 | #include "protocol.h" | |
30 | ||
31 | #define DEFAULT_NUM_LOGIC_CHANNELS 8 | |
32 | #define DEFAULT_LOGIC_PATTERN PATTERN_SIGROK | |
33 | ||
34 | #define DEFAULT_NUM_ANALOG_CHANNELS 4 | |
35 | #define DEFAULT_ANALOG_AMPLITUDE 10 | |
36 | ||
37 | /* Note: No spaces allowed because of sigrok-cli. */ | |
38 | static const char *logic_pattern_str[] = { | |
39 | "sigrok", | |
40 | "random", | |
41 | "incremental", | |
42 | "walking-one", | |
43 | "walking-zero", | |
44 | "all-low", | |
45 | "all-high", | |
46 | "squid", | |
47 | }; | |
48 | ||
49 | static const uint32_t scanopts[] = { | |
50 | SR_CONF_NUM_LOGIC_CHANNELS, | |
51 | SR_CONF_NUM_ANALOG_CHANNELS, | |
52 | }; | |
53 | ||
54 | static const uint32_t drvopts[] = { | |
55 | SR_CONF_DEMO_DEV, | |
56 | SR_CONF_LOGIC_ANALYZER, | |
57 | SR_CONF_OSCILLOSCOPE, | |
58 | }; | |
59 | ||
60 | static const uint32_t devopts[] = { | |
61 | SR_CONF_CONTINUOUS, | |
62 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
63 | SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, | |
64 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
65 | SR_CONF_AVERAGING | SR_CONF_GET | SR_CONF_SET, | |
66 | SR_CONF_AVG_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
67 | }; | |
68 | ||
69 | static const uint32_t devopts_cg_logic[] = { | |
70 | SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
71 | }; | |
72 | ||
73 | static const uint32_t devopts_cg_analog_group[] = { | |
74 | SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, | |
75 | }; | |
76 | ||
77 | static const uint32_t devopts_cg_analog_channel[] = { | |
78 | SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
79 | SR_CONF_AMPLITUDE | SR_CONF_GET | SR_CONF_SET, | |
80 | }; | |
81 | ||
82 | static const uint64_t samplerates[] = { | |
83 | SR_HZ(1), | |
84 | SR_GHZ(1), | |
85 | SR_HZ(1), | |
86 | }; | |
87 | ||
88 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
89 | { | |
90 | struct dev_context *devc; | |
91 | struct sr_dev_inst *sdi; | |
92 | struct sr_channel *ch; | |
93 | struct sr_channel_group *cg, *acg; | |
94 | struct sr_config *src; | |
95 | struct analog_gen *ag; | |
96 | GSList *l; | |
97 | int num_logic_channels, num_analog_channels, pattern, i; | |
98 | char channel_name[16]; | |
99 | ||
100 | num_logic_channels = DEFAULT_NUM_LOGIC_CHANNELS; | |
101 | num_analog_channels = DEFAULT_NUM_ANALOG_CHANNELS; | |
102 | for (l = options; l; l = l->next) { | |
103 | src = l->data; | |
104 | switch (src->key) { | |
105 | case SR_CONF_NUM_LOGIC_CHANNELS: | |
106 | num_logic_channels = g_variant_get_int32(src->data); | |
107 | break; | |
108 | case SR_CONF_NUM_ANALOG_CHANNELS: | |
109 | num_analog_channels = g_variant_get_int32(src->data); | |
110 | break; | |
111 | } | |
112 | } | |
113 | ||
114 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
115 | sdi->status = SR_ST_INACTIVE; | |
116 | sdi->model = g_strdup("Demo device"); | |
117 | ||
118 | devc = g_malloc0(sizeof(struct dev_context)); | |
119 | devc->cur_samplerate = SR_KHZ(200); | |
120 | devc->num_logic_channels = num_logic_channels; | |
121 | devc->logic_unitsize = (devc->num_logic_channels + 7) / 8; | |
122 | devc->logic_pattern = DEFAULT_LOGIC_PATTERN; | |
123 | devc->num_analog_channels = num_analog_channels; | |
124 | ||
125 | if (num_logic_channels > 0) { | |
126 | /* Logic channels, all in one channel group. */ | |
127 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
128 | cg->name = g_strdup("Logic"); | |
129 | for (i = 0; i < num_logic_channels; i++) { | |
130 | sprintf(channel_name, "D%d", i); | |
131 | ch = sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name); | |
132 | cg->channels = g_slist_append(cg->channels, ch); | |
133 | } | |
134 | sdi->channel_groups = g_slist_append(NULL, cg); | |
135 | } | |
136 | ||
137 | /* Analog channels, channel groups and pattern generators. */ | |
138 | devc->ch_ag = g_hash_table_new(g_direct_hash, g_direct_equal); | |
139 | if (num_analog_channels > 0) { | |
140 | pattern = 0; | |
141 | /* An "Analog" channel group with all analog channels in it. */ | |
142 | acg = g_malloc0(sizeof(struct sr_channel_group)); | |
143 | acg->name = g_strdup("Analog"); | |
144 | sdi->channel_groups = g_slist_append(sdi->channel_groups, acg); | |
145 | ||
146 | for (i = 0; i < num_analog_channels; i++) { | |
147 | snprintf(channel_name, 16, "A%d", i); | |
148 | ch = sr_channel_new(sdi, i + num_logic_channels, SR_CHANNEL_ANALOG, | |
149 | TRUE, channel_name); | |
150 | acg->channels = g_slist_append(acg->channels, ch); | |
151 | ||
152 | /* Every analog channel gets its own channel group as well. */ | |
153 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
154 | cg->name = g_strdup(channel_name); | |
155 | cg->channels = g_slist_append(NULL, ch); | |
156 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
157 | ||
158 | /* Every channel gets a generator struct. */ | |
159 | ag = g_malloc(sizeof(struct analog_gen)); | |
160 | ag->ch = ch; | |
161 | ag->amplitude = DEFAULT_ANALOG_AMPLITUDE; | |
162 | sr_analog_init(&ag->packet, &ag->encoding, &ag->meaning, &ag->spec, 2); | |
163 | ag->packet.meaning->channels = cg->channels; | |
164 | ag->packet.meaning->mq = 0; | |
165 | ag->packet.meaning->mqflags = 0; | |
166 | ag->packet.meaning->unit = SR_UNIT_VOLT; | |
167 | ag->packet.data = ag->pattern_data; | |
168 | ag->pattern = pattern; | |
169 | ag->avg_val = 0.0f; | |
170 | ag->num_avgs = 0; | |
171 | g_hash_table_insert(devc->ch_ag, ch, ag); | |
172 | ||
173 | if (++pattern == ARRAY_SIZE(analog_pattern_str)) | |
174 | pattern = 0; | |
175 | } | |
176 | } | |
177 | ||
178 | sdi->priv = devc; | |
179 | ||
180 | return std_scan_complete(di, g_slist_append(NULL, sdi)); | |
181 | } | |
182 | ||
183 | static void clear_helper(struct dev_context *devc) | |
184 | { | |
185 | GHashTableIter iter; | |
186 | void *value; | |
187 | ||
188 | /* Analog generators. */ | |
189 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
190 | while (g_hash_table_iter_next(&iter, NULL, &value)) | |
191 | g_free(value); | |
192 | g_hash_table_unref(devc->ch_ag); | |
193 | } | |
194 | ||
195 | static int dev_clear(const struct sr_dev_driver *di) | |
196 | { | |
197 | return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper); | |
198 | } | |
199 | ||
200 | static int config_get(uint32_t key, GVariant **data, | |
201 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
202 | { | |
203 | struct dev_context *devc; | |
204 | struct sr_channel *ch; | |
205 | struct analog_gen *ag; | |
206 | int pattern; | |
207 | ||
208 | if (!sdi) | |
209 | return SR_ERR_ARG; | |
210 | ||
211 | devc = sdi->priv; | |
212 | switch (key) { | |
213 | case SR_CONF_SAMPLERATE: | |
214 | *data = g_variant_new_uint64(devc->cur_samplerate); | |
215 | break; | |
216 | case SR_CONF_LIMIT_SAMPLES: | |
217 | *data = g_variant_new_uint64(devc->limit_samples); | |
218 | break; | |
219 | case SR_CONF_LIMIT_MSEC: | |
220 | *data = g_variant_new_uint64(devc->limit_msec); | |
221 | break; | |
222 | case SR_CONF_AVERAGING: | |
223 | *data = g_variant_new_boolean(devc->avg); | |
224 | break; | |
225 | case SR_CONF_AVG_SAMPLES: | |
226 | *data = g_variant_new_uint64(devc->avg_samples); | |
227 | break; | |
228 | case SR_CONF_PATTERN_MODE: | |
229 | if (!cg) | |
230 | return SR_ERR_CHANNEL_GROUP; | |
231 | /* Any channel in the group will do. */ | |
232 | ch = cg->channels->data; | |
233 | if (ch->type == SR_CHANNEL_LOGIC) { | |
234 | pattern = devc->logic_pattern; | |
235 | *data = g_variant_new_string(logic_pattern_str[pattern]); | |
236 | } else if (ch->type == SR_CHANNEL_ANALOG) { | |
237 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
238 | pattern = ag->pattern; | |
239 | *data = g_variant_new_string(analog_pattern_str[pattern]); | |
240 | } else | |
241 | return SR_ERR_BUG; | |
242 | break; | |
243 | case SR_CONF_AMPLITUDE: | |
244 | if (!cg) | |
245 | return SR_ERR_CHANNEL_GROUP; | |
246 | /* Any channel in the group will do. */ | |
247 | ch = cg->channels->data; | |
248 | if (ch->type != SR_CHANNEL_ANALOG) | |
249 | return SR_ERR_ARG; | |
250 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
251 | *data = g_variant_new_double(ag->amplitude); | |
252 | break; | |
253 | default: | |
254 | return SR_ERR_NA; | |
255 | } | |
256 | ||
257 | return SR_OK; | |
258 | } | |
259 | ||
260 | static int config_set(uint32_t key, GVariant *data, | |
261 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
262 | { | |
263 | struct dev_context *devc; | |
264 | struct analog_gen *ag; | |
265 | struct sr_channel *ch; | |
266 | GSList *l; | |
267 | int logic_pattern, analog_pattern; | |
268 | ||
269 | devc = sdi->priv; | |
270 | ||
271 | switch (key) { | |
272 | case SR_CONF_SAMPLERATE: | |
273 | devc->cur_samplerate = g_variant_get_uint64(data); | |
274 | break; | |
275 | case SR_CONF_LIMIT_SAMPLES: | |
276 | devc->limit_msec = 0; | |
277 | devc->limit_samples = g_variant_get_uint64(data); | |
278 | break; | |
279 | case SR_CONF_LIMIT_MSEC: | |
280 | devc->limit_msec = g_variant_get_uint64(data); | |
281 | devc->limit_samples = 0; | |
282 | break; | |
283 | case SR_CONF_AVERAGING: | |
284 | devc->avg = g_variant_get_boolean(data); | |
285 | sr_dbg("%s averaging", devc->avg ? "Enabling" : "Disabling"); | |
286 | break; | |
287 | case SR_CONF_AVG_SAMPLES: | |
288 | devc->avg_samples = g_variant_get_uint64(data); | |
289 | sr_dbg("Setting averaging rate to %" PRIu64, devc->avg_samples); | |
290 | break; | |
291 | case SR_CONF_PATTERN_MODE: | |
292 | if (!cg) | |
293 | return SR_ERR_CHANNEL_GROUP; | |
294 | logic_pattern = std_str_idx(data, ARRAY_AND_SIZE(logic_pattern_str)); | |
295 | analog_pattern = std_str_idx(data, ARRAY_AND_SIZE(analog_pattern_str)); | |
296 | if (logic_pattern < 0 && analog_pattern < 0) | |
297 | return SR_ERR_ARG; | |
298 | for (l = cg->channels; l; l = l->next) { | |
299 | ch = l->data; | |
300 | if (ch->type == SR_CHANNEL_LOGIC) { | |
301 | if (logic_pattern == -1) | |
302 | return SR_ERR_ARG; | |
303 | sr_dbg("Setting logic pattern to %s", | |
304 | logic_pattern_str[logic_pattern]); | |
305 | devc->logic_pattern = logic_pattern; | |
306 | /* Might as well do this now, these are static. */ | |
307 | if (logic_pattern == PATTERN_ALL_LOW) | |
308 | memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); | |
309 | else if (logic_pattern == PATTERN_ALL_HIGH) | |
310 | memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); | |
311 | } else if (ch->type == SR_CHANNEL_ANALOG) { | |
312 | if (analog_pattern == -1) | |
313 | return SR_ERR_ARG; | |
314 | sr_dbg("Setting analog pattern for channel %s to %s", | |
315 | ch->name, analog_pattern_str[analog_pattern]); | |
316 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
317 | ag->pattern = analog_pattern; | |
318 | } else | |
319 | return SR_ERR_BUG; | |
320 | } | |
321 | break; | |
322 | case SR_CONF_AMPLITUDE: | |
323 | if (!cg) | |
324 | return SR_ERR_CHANNEL_GROUP; | |
325 | for (l = cg->channels; l; l = l->next) { | |
326 | ch = l->data; | |
327 | if (ch->type != SR_CHANNEL_ANALOG) | |
328 | return SR_ERR_ARG; | |
329 | ag = g_hash_table_lookup(devc->ch_ag, ch); | |
330 | ag->amplitude = g_variant_get_double(data); | |
331 | } | |
332 | break; | |
333 | default: | |
334 | return SR_ERR_NA; | |
335 | } | |
336 | ||
337 | return SR_OK; | |
338 | } | |
339 | ||
340 | static int config_list(uint32_t key, GVariant **data, | |
341 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
342 | { | |
343 | struct sr_channel *ch; | |
344 | ||
345 | if (!cg) { | |
346 | switch (key) { | |
347 | case SR_CONF_SCAN_OPTIONS: | |
348 | case SR_CONF_DEVICE_OPTIONS: | |
349 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
350 | case SR_CONF_SAMPLERATE: | |
351 | *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates)); | |
352 | break; | |
353 | default: | |
354 | return SR_ERR_NA; | |
355 | } | |
356 | } else { | |
357 | ch = cg->channels->data; | |
358 | switch (key) { | |
359 | case SR_CONF_DEVICE_OPTIONS: | |
360 | if (ch->type == SR_CHANNEL_LOGIC) | |
361 | *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_logic)); | |
362 | else if (ch->type == SR_CHANNEL_ANALOG) { | |
363 | if (strcmp(cg->name, "Analog") == 0) | |
364 | *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_analog_group)); | |
365 | else | |
366 | *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_analog_channel)); | |
367 | } | |
368 | else | |
369 | return SR_ERR_BUG; | |
370 | break; | |
371 | case SR_CONF_PATTERN_MODE: | |
372 | /* The analog group (with all 4 channels) shall not have a pattern property. */ | |
373 | if (strcmp(cg->name, "Analog") == 0) | |
374 | return SR_ERR_NA; | |
375 | ||
376 | if (ch->type == SR_CHANNEL_LOGIC) | |
377 | *data = g_variant_new_strv(ARRAY_AND_SIZE(logic_pattern_str)); | |
378 | else if (ch->type == SR_CHANNEL_ANALOG) | |
379 | *data = g_variant_new_strv(ARRAY_AND_SIZE(analog_pattern_str)); | |
380 | else | |
381 | return SR_ERR_BUG; | |
382 | break; | |
383 | default: | |
384 | return SR_ERR_NA; | |
385 | } | |
386 | } | |
387 | ||
388 | return SR_OK; | |
389 | } | |
390 | ||
391 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
392 | { | |
393 | struct dev_context *devc; | |
394 | GSList *l; | |
395 | struct sr_channel *ch; | |
396 | int bitpos; | |
397 | uint8_t mask; | |
398 | GHashTableIter iter; | |
399 | void *value; | |
400 | ||
401 | devc = sdi->priv; | |
402 | devc->sent_samples = 0; | |
403 | ||
404 | /* | |
405 | * Determine the numbers of logic and analog channels that are | |
406 | * involved in the acquisition. Determine an offset and a mask to | |
407 | * remove excess logic data content before datafeed submission. | |
408 | */ | |
409 | devc->enabled_logic_channels = 0; | |
410 | devc->enabled_analog_channels = 0; | |
411 | for (l = sdi->channels; l; l = l->next) { | |
412 | ch = l->data; | |
413 | if (!ch->enabled) | |
414 | continue; | |
415 | if (ch->type == SR_CHANNEL_ANALOG) { | |
416 | devc->enabled_analog_channels++; | |
417 | continue; | |
418 | } | |
419 | if (ch->type != SR_CHANNEL_LOGIC) | |
420 | continue; | |
421 | /* | |
422 | * TODO: Need we create a channel map here, such that the | |
423 | * session datafeed packets will have a dense representation | |
424 | * of the enabled channels' data? For example store channels | |
425 | * D3 and D5 in bit positions 0 and 1 respectively, when all | |
426 | * other channels are disabled? The current implementation | |
427 | * generates a sparse layout, might provide data for logic | |
428 | * channels that are disabled while it might suppress data | |
429 | * from enabled channels at the same time. | |
430 | */ | |
431 | devc->enabled_logic_channels++; | |
432 | } | |
433 | devc->first_partial_logic_index = devc->enabled_logic_channels / 8; | |
434 | bitpos = devc->enabled_logic_channels % 8; | |
435 | mask = (1 << bitpos) - 1; | |
436 | devc->first_partial_logic_mask = mask; | |
437 | sr_dbg("num logic %zu, partial off %zu, mask 0x%02x.", | |
438 | devc->enabled_logic_channels, | |
439 | devc->first_partial_logic_index, | |
440 | devc->first_partial_logic_mask); | |
441 | ||
442 | /* | |
443 | * Have the waveform for analog patterns pre-generated. It's | |
444 | * supposed to be periodic, so the generator just needs to | |
445 | * access the prepared sample data (DDS style). | |
446 | */ | |
447 | g_hash_table_iter_init(&iter, devc->ch_ag); | |
448 | while (g_hash_table_iter_next(&iter, NULL, &value)) | |
449 | demo_generate_analog_pattern(value, devc->cur_samplerate); | |
450 | ||
451 | sr_session_source_add(sdi->session, -1, 0, 100, | |
452 | demo_prepare_data, (struct sr_dev_inst *)sdi); | |
453 | ||
454 | std_session_send_df_header(sdi); | |
455 | ||
456 | /* We use this timestamp to decide how many more samples to send. */ | |
457 | devc->start_us = g_get_monotonic_time(); | |
458 | devc->spent_us = 0; | |
459 | devc->step = 0; | |
460 | ||
461 | return SR_OK; | |
462 | } | |
463 | ||
464 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
465 | { | |
466 | sr_session_source_remove(sdi->session, -1); | |
467 | std_session_send_df_end(sdi); | |
468 | ||
469 | return SR_OK; | |
470 | } | |
471 | ||
472 | static struct sr_dev_driver demo_driver_info = { | |
473 | .name = "demo", | |
474 | .longname = "Demo driver and pattern generator", | |
475 | .api_version = 1, | |
476 | .init = std_init, | |
477 | .cleanup = std_cleanup, | |
478 | .scan = scan, | |
479 | .dev_list = std_dev_list, | |
480 | .dev_clear = dev_clear, | |
481 | .config_get = config_get, | |
482 | .config_set = config_set, | |
483 | .config_list = config_list, | |
484 | .dev_open = std_dummy_dev_open, | |
485 | .dev_close = std_dummy_dev_close, | |
486 | .dev_acquisition_start = dev_acquisition_start, | |
487 | .dev_acquisition_stop = dev_acquisition_stop, | |
488 | .context = NULL, | |
489 | }; | |
490 | SR_REGISTER_DEV_DRIVER(demo_driver_info); |