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6239c175 | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
6239c175 UH |
3 | * |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
fc96e6f8 | 5 | * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com> |
c216d623 | 6 | * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
6239c175 UH |
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> | |
85b5af06 | 24 | #include <unistd.h> |
6239c175 | 25 | #include <string.h> |
d35aaf02 UH |
26 | #ifdef _WIN32 |
27 | #include <io.h> | |
28 | #include <fcntl.h> | |
29 | #define pipe(fds) _pipe(fds, 4096, _O_BINARY) | |
30 | #endif | |
45c59c8b BV |
31 | #include "libsigrok.h" |
32 | #include "libsigrok-internal.h" | |
6239c175 | 33 | |
3544f848 | 34 | #define LOG_PREFIX "demo" |
92bcedf6 | 35 | |
c07f60e7 BV |
36 | #define DEFAULT_NUM_LOGIC_PROBES 8 |
37 | #define DEFAULT_NUM_ANALOG_PROBES 4 | |
c03ed397 UH |
38 | |
39 | /* The size of chunks to send through the session bus. */ | |
61c39f54 | 40 | #define LOGIC_BUFSIZE 4096 |
2474d87e | 41 | |
61c39f54 | 42 | /* Patterns we can generate */ |
e15f48c2 | 43 | enum { |
0d31276b | 44 | /** |
61c39f54 BV |
45 | * Spells "sigrok" across 8 probes using '0's (with '1's as |
46 | * "background") when displayed using the 'bits' output format. | |
c07f60e7 BV |
47 | * The pattern is repeasted every 8 probes, shifted to the right |
48 | * in time by one bit. | |
0d31276b | 49 | */ |
c8f4624d | 50 | PATTERN_SIGROK, |
0d31276b | 51 | |
c07f60e7 | 52 | /** Pseudo-random values on all probes. */ |
c8f4624d | 53 | PATTERN_RANDOM, |
0d31276b UH |
54 | |
55 | /** | |
c07f60e7 BV |
56 | * Incrementing number across 8 probes. The pattern is repeasted |
57 | * every 8 probes, shifted to the right in time by one bit. | |
0d31276b | 58 | */ |
c8f4624d | 59 | PATTERN_INC, |
c03ed397 | 60 | |
61c39f54 | 61 | /** All probes have a low logic state. */ |
c03ed397 UH |
62 | PATTERN_ALL_LOW, |
63 | ||
61c39f54 | 64 | /** All probes have a high logic state. */ |
c03ed397 | 65 | PATTERN_ALL_HIGH, |
e15f48c2 | 66 | }; |
85b5af06 | 67 | |
61c39f54 BV |
68 | static const char *pattern_strings[] = { |
69 | "sigrok", | |
70 | "random", | |
71 | "incremental", | |
72 | "all-low", | |
73 | "all-high", | |
74 | }; | |
75 | ||
b4750a3a BV |
76 | /* Private, per-device-instance driver context. */ |
77 | struct dev_context { | |
e15f48c2 | 78 | int pipe_fds[2]; |
e0532047 | 79 | GIOChannel *channel; |
a7684294 JH |
80 | uint64_t cur_samplerate; |
81 | uint64_t limit_samples; | |
82 | uint64_t limit_msec; | |
e15f48c2 | 83 | uint64_t samples_counter; |
3b203673 | 84 | int64_t starttime; |
61c39f54 | 85 | uint64_t step; |
c07f60e7 BV |
86 | int32_t num_logic_probes; |
87 | unsigned int logic_unitsize; | |
88 | uint8_t logic_pattern; | |
89 | unsigned char logic_data[LOGIC_BUFSIZE]; | |
90 | int32_t num_analog_probes; | |
91 | }; | |
92 | ||
93 | static const int32_t hwopts[] = { | |
94 | SR_CONF_NUM_LOGIC_PROBES, | |
95 | SR_CONF_NUM_ANALOG_PROBES, | |
e15f48c2 | 96 | }; |
85b5af06 | 97 | |
915f7cc8 | 98 | static const int hwcaps[] = { |
1953564a BV |
99 | SR_CONF_LOGIC_ANALYZER, |
100 | SR_CONF_DEMO_DEV, | |
101 | SR_CONF_SAMPLERATE, | |
102 | SR_CONF_PATTERN_MODE, | |
103 | SR_CONF_LIMIT_SAMPLES, | |
104 | SR_CONF_LIMIT_MSEC, | |
105 | SR_CONF_CONTINUOUS, | |
6239c175 UH |
106 | }; |
107 | ||
d00088ca BV |
108 | static const uint64_t samplerates[] = { |
109 | SR_HZ(1), | |
110 | SR_GHZ(1), | |
111 | SR_HZ(1), | |
4bfbf9fc BV |
112 | }; |
113 | ||
c8f4624d | 114 | static uint8_t pattern_sigrok[] = { |
917e0e71 BV |
115 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, |
116 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
117 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
118 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
119 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
120 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
121 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
122 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
123 | }; | |
124 | ||
dcf03d6d | 125 | SR_PRIV struct sr_dev_driver demo_driver_info; |
a873c594 | 126 | static struct sr_dev_driver *di = &demo_driver_info; |
6239c175 | 127 | |
6078d2c9 | 128 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); |
6239c175 | 129 | |
c07f60e7 | 130 | |
3b412e3a | 131 | static int dev_clear(void) |
eebb6067 | 132 | { |
1c2d542d | 133 | return std_dev_clear(di, NULL); |
eebb6067 UH |
134 | } |
135 | ||
6078d2c9 | 136 | static int init(struct sr_context *sr_ctx) |
61136ea6 | 137 | { |
f6beaac5 | 138 | return std_init(sr_ctx, di, LOG_PREFIX); |
61136ea6 BV |
139 | } |
140 | ||
6078d2c9 | 141 | static GSList *scan(GSList *options) |
6239c175 | 142 | { |
b4750a3a | 143 | struct drv_context *drvc; |
33ef7573 | 144 | struct dev_context *devc; |
c07f60e7 BV |
145 | struct sr_dev_inst *sdi; |
146 | struct sr_probe *probe; | |
147 | struct sr_config *src; | |
148 | GSList *devices, *l; | |
149 | int num_logic_probes, num_analog_probes, i; | |
61c39f54 | 150 | char probe_name[16]; |
067d0716 | 151 | |
a873c594 | 152 | drvc = di->priv; |
4b97c74e | 153 | |
c07f60e7 BV |
154 | num_logic_probes = DEFAULT_NUM_LOGIC_PROBES; |
155 | num_analog_probes = DEFAULT_NUM_ANALOG_PROBES; | |
156 | for (l = options; l; l = l->next) { | |
157 | src = l->data; | |
158 | switch (src->key) { | |
159 | case SR_CONF_NUM_LOGIC_PROBES: | |
160 | num_logic_probes = g_variant_get_int32(src->data); | |
161 | break; | |
162 | case SR_CONF_NUM_ANALOG_PROBES: | |
163 | num_analog_probes = g_variant_get_int32(src->data); | |
164 | break; | |
165 | } | |
166 | } | |
85b5af06 | 167 | |
c07f60e7 | 168 | devices = NULL; |
61c39f54 | 169 | sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "Demo device", NULL, NULL); |
c03ed397 | 170 | if (!sdi) { |
e45ad6e2 UH |
171 | sr_err("Device instance creation failed."); |
172 | return NULL; | |
c03ed397 | 173 | } |
a873c594 | 174 | sdi->driver = di; |
e15f48c2 | 175 | |
c07f60e7 | 176 | for (i = 0; i < num_logic_probes; i++) { |
61c39f54 BV |
177 | sprintf(probe_name, "D%d", i); |
178 | if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, probe_name))) | |
87ca93c5 BV |
179 | return NULL; |
180 | sdi->probes = g_slist_append(sdi->probes, probe); | |
181 | } | |
182 | ||
c07f60e7 BV |
183 | for (i = 0; i < num_analog_probes; i++) { |
184 | sprintf(probe_name, "A%d", i); | |
185 | if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, probe_name))) | |
186 | return NULL; | |
187 | sdi->probes = g_slist_append(sdi->probes, probe); | |
188 | } | |
189 | ||
067d0716 | 190 | devices = g_slist_append(devices, sdi); |
b4750a3a | 191 | drvc->instances = g_slist_append(drvc->instances, sdi); |
85b5af06 | 192 | |
33ef7573 | 193 | if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { |
e45ad6e2 UH |
194 | sr_err("Device context malloc failed."); |
195 | return NULL; | |
33ef7573 | 196 | } |
a7684294 JH |
197 | devc->cur_samplerate = SR_KHZ(200); |
198 | devc->limit_samples = 0; | |
199 | devc->limit_msec = 0; | |
c07f60e7 BV |
200 | devc->step = 0; |
201 | devc->num_logic_probes = num_logic_probes; | |
202 | devc->logic_unitsize = (devc->num_logic_probes + 7) / 8; | |
203 | devc->logic_pattern = PATTERN_SIGROK; | |
204 | devc->num_analog_probes = num_analog_probes; | |
33ef7573 JH |
205 | |
206 | sdi->priv = devc; | |
207 | ||
067d0716 | 208 | return devices; |
6239c175 UH |
209 | } |
210 | ||
6078d2c9 | 211 | static GSList *dev_list(void) |
811deee4 | 212 | { |
0e94d524 | 213 | return ((struct drv_context *)(di->priv))->instances; |
811deee4 BV |
214 | } |
215 | ||
6078d2c9 | 216 | static int dev_open(struct sr_dev_inst *sdi) |
6239c175 | 217 | { |
e73ffd42 | 218 | sdi->status = SR_ST_ACTIVE; |
697785d1 | 219 | |
e46b8fb1 | 220 | return SR_OK; |
6239c175 UH |
221 | } |
222 | ||
6078d2c9 | 223 | static int dev_close(struct sr_dev_inst *sdi) |
6239c175 | 224 | { |
decfe89d | 225 | sdi->status = SR_ST_INACTIVE; |
697785d1 UH |
226 | |
227 | return SR_OK; | |
6239c175 UH |
228 | } |
229 | ||
6078d2c9 | 230 | static int cleanup(void) |
6239c175 | 231 | { |
1c2d542d | 232 | return dev_clear(); |
6239c175 UH |
233 | } |
234 | ||
8f996b89 ML |
235 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, |
236 | const struct sr_probe_group *probe_group) | |
6239c175 | 237 | { |
c07f60e7 | 238 | struct dev_context *devc; |
6f57fd96 | 239 | |
8f996b89 ML |
240 | (void)probe_group; |
241 | ||
c07f60e7 | 242 | devc = sdi->priv; |
035a1078 | 243 | switch (id) { |
123e1313 | 244 | case SR_CONF_SAMPLERATE: |
a7684294 | 245 | *data = g_variant_new_uint64(devc->cur_samplerate); |
6239c175 | 246 | break; |
2474d87e | 247 | case SR_CONF_LIMIT_SAMPLES: |
a7684294 | 248 | *data = g_variant_new_uint64(devc->limit_samples); |
2474d87e BV |
249 | break; |
250 | case SR_CONF_LIMIT_MSEC: | |
a7684294 | 251 | *data = g_variant_new_uint64(devc->limit_msec); |
2474d87e BV |
252 | break; |
253 | case SR_CONF_PATTERN_MODE: | |
c07f60e7 BV |
254 | *data = g_variant_new_string(pattern_strings[devc->logic_pattern]); |
255 | break; | |
256 | case SR_CONF_NUM_LOGIC_PROBES: | |
257 | *data = g_variant_new_int32(devc->num_logic_probes); | |
258 | break; | |
259 | case SR_CONF_NUM_ANALOG_PROBES: | |
260 | *data = g_variant_new_int32(devc->num_analog_probes); | |
2474d87e | 261 | break; |
7dfcf010 | 262 | default: |
bd6fbf62 | 263 | return SR_ERR_NA; |
6239c175 UH |
264 | } |
265 | ||
dfb0fa1a | 266 | return SR_OK; |
6239c175 UH |
267 | } |
268 | ||
8f996b89 ML |
269 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, |
270 | const struct sr_probe_group *probe_group) | |
6239c175 | 271 | { |
61c39f54 | 272 | unsigned int i; |
6239c175 | 273 | int ret; |
1b79df2f | 274 | const char *stropt; |
6239c175 | 275 | |
8f996b89 | 276 | (void)probe_group; |
a7684294 | 277 | struct dev_context *const devc = sdi->priv; |
6239c175 | 278 | |
e73ffd42 BV |
279 | if (sdi->status != SR_ST_ACTIVE) |
280 | return SR_ERR_DEV_CLOSED; | |
281 | ||
035a1078 | 282 | if (id == SR_CONF_SAMPLERATE) { |
a7684294 | 283 | devc->cur_samplerate = g_variant_get_uint64(data); |
61c39f54 | 284 | sr_dbg("Setting samplerate to %" PRIu64, devc->cur_samplerate); |
e46b8fb1 | 285 | ret = SR_OK; |
035a1078 | 286 | } else if (id == SR_CONF_LIMIT_SAMPLES) { |
a7684294 JH |
287 | devc->limit_msec = 0; |
288 | devc->limit_samples = g_variant_get_uint64(data); | |
61c39f54 | 289 | sr_dbg("Setting limit_samples to %" PRIu64, devc->limit_samples); |
e46b8fb1 | 290 | ret = SR_OK; |
035a1078 | 291 | } else if (id == SR_CONF_LIMIT_MSEC) { |
a7684294 JH |
292 | devc->limit_msec = g_variant_get_uint64(data); |
293 | devc->limit_samples = 0; | |
61c39f54 | 294 | sr_dbg("Setting limit_msec to %" PRIu64, devc->limit_msec); |
e46b8fb1 | 295 | ret = SR_OK; |
035a1078 | 296 | } else if (id == SR_CONF_PATTERN_MODE) { |
d00088ca | 297 | stropt = g_variant_get_string(data, NULL); |
61c39f54 BV |
298 | ret = SR_ERR; |
299 | for (i = 0; i < ARRAY_SIZE(pattern_strings); i++) { | |
300 | if (!strcmp(stropt, pattern_strings[i])) { | |
c07f60e7 | 301 | devc->logic_pattern = i; |
61c39f54 BV |
302 | ret = SR_OK; |
303 | break; | |
304 | } | |
e15f48c2 | 305 | } |
61c39f54 BV |
306 | /* Might as well do this now. */ |
307 | if (i == PATTERN_ALL_LOW) | |
308 | memset(devc->logic_data, 0x00, LOGIC_BUFSIZE); | |
309 | else if (i == PATTERN_ALL_HIGH) | |
310 | memset(devc->logic_data, 0xff, LOGIC_BUFSIZE); | |
311 | sr_dbg("Setting pattern to %s", pattern_strings[i]); | |
6239c175 | 312 | } else { |
bd6fbf62 | 313 | ret = SR_ERR_NA; |
6239c175 UH |
314 | } |
315 | ||
316 | return ret; | |
317 | } | |
318 | ||
8f996b89 ML |
319 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, |
320 | const struct sr_probe_group *probe_group) | |
a1c743fc | 321 | { |
d00088ca BV |
322 | GVariant *gvar; |
323 | GVariantBuilder gvb; | |
a1c743fc BV |
324 | |
325 | (void)sdi; | |
8f996b89 | 326 | (void)probe_group; |
a1c743fc BV |
327 | |
328 | switch (key) { | |
c07f60e7 BV |
329 | case SR_CONF_SCAN_OPTIONS: |
330 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, | |
331 | hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t)); | |
332 | break; | |
9a6517d1 | 333 | case SR_CONF_DEVICE_OPTIONS: |
d00088ca BV |
334 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, |
335 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
9a6517d1 | 336 | break; |
a1c743fc | 337 | case SR_CONF_SAMPLERATE: |
d00088ca BV |
338 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); |
339 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, | |
340 | ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
341 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
342 | *data = g_variant_builder_end(&gvb); | |
a1c743fc | 343 | break; |
dd96ea98 | 344 | case SR_CONF_PATTERN_MODE: |
d00088ca | 345 | *data = g_variant_new_strv(pattern_strings, ARRAY_SIZE(pattern_strings)); |
dd96ea98 | 346 | break; |
a1c743fc | 347 | default: |
bd6fbf62 | 348 | return SR_ERR_NA; |
a1c743fc BV |
349 | } |
350 | ||
351 | return SR_OK; | |
352 | } | |
353 | ||
c07f60e7 | 354 | static void logic_generator(struct sr_dev_inst *sdi, uint64_t size) |
85b5af06 | 355 | { |
61c39f54 | 356 | struct dev_context *devc; |
c07f60e7 BV |
357 | uint64_t i, j; |
358 | uint8_t pat; | |
85b5af06 | 359 | |
61c39f54 | 360 | devc = sdi->priv; |
85b5af06 | 361 | |
c07f60e7 | 362 | switch (devc->logic_pattern) { |
61c39f54 | 363 | case PATTERN_SIGROK: |
c07f60e7 BV |
364 | memset(devc->logic_data, 0x00, size); |
365 | for (i = 0; i < size; i += devc->logic_unitsize) { | |
366 | for (j = 0; j < devc->logic_unitsize; j++) { | |
367 | pat = pattern_sigrok[(devc->step + j) % sizeof(pattern_sigrok)] >> 1; | |
368 | devc->logic_data[i + j] = ~pat; | |
369 | } | |
370 | devc->step++; | |
917e0e71 BV |
371 | } |
372 | break; | |
61c39f54 | 373 | case PATTERN_RANDOM: |
5096c6a6 | 374 | for (i = 0; i < size; i++) |
61c39f54 | 375 | devc->logic_data[i] = (uint8_t)(rand() & 0xff); |
85b5af06 | 376 | break; |
61c39f54 | 377 | case PATTERN_INC: |
c07f60e7 BV |
378 | for (i = 0; i < size; i++) { |
379 | for (j = 0; j < devc->logic_unitsize; j++) { | |
380 | devc->logic_data[i + j] = devc->step; | |
381 | } | |
382 | devc->step++; | |
383 | } | |
c03ed397 | 384 | break; |
61c39f54 BV |
385 | case PATTERN_ALL_LOW: |
386 | case PATTERN_ALL_HIGH: | |
387 | /* These were set when the pattern mode was selected. */ | |
c03ed397 UH |
388 | break; |
389 | default: | |
c07f60e7 | 390 | sr_err("Unknown pattern: %d.", devc->logic_pattern); |
c03ed397 | 391 | break; |
85b5af06 UH |
392 | } |
393 | } | |
394 | ||
85b5af06 | 395 | /* Callback handling data */ |
61c39f54 | 396 | static int prepare_data(int fd, int revents, void *cb_data) |
85b5af06 | 397 | { |
61c39f54 BV |
398 | struct sr_dev_inst *sdi; |
399 | struct dev_context *devc; | |
b9c735a2 | 400 | struct sr_datafeed_packet packet; |
9c939c51 | 401 | struct sr_datafeed_logic logic; |
c07f60e7 | 402 | uint64_t samples_to_send, expected_samplenum, sending_now; |
3b203673 | 403 | int64_t time, elapsed; |
1924f59f | 404 | |
cb93f8a9 UH |
405 | (void)fd; |
406 | (void)revents; | |
1924f59f | 407 | |
61c39f54 BV |
408 | sdi = cb_data; |
409 | devc = sdi->priv; | |
410 | ||
3b203673 AG |
411 | /* How many "virtual" samples should we have collected by now? */ |
412 | time = g_get_monotonic_time(); | |
413 | elapsed = time - devc->starttime; | |
a7684294 | 414 | expected_samplenum = elapsed * devc->cur_samplerate / 1000000; |
3b203673 AG |
415 | /* Of those, how many do we still have to send? */ |
416 | samples_to_send = expected_samplenum - devc->samples_counter; | |
417 | ||
a7684294 | 418 | if (devc->limit_samples) { |
3b203673 | 419 | samples_to_send = MIN(samples_to_send, |
c07f60e7 | 420 | devc->limit_samples - devc->samples_counter); |
3b203673 | 421 | } |
85b5af06 | 422 | |
3b203673 | 423 | while (samples_to_send > 0) { |
c07f60e7 | 424 | sending_now = MIN(samples_to_send, LOGIC_BUFSIZE / devc->logic_unitsize); |
3b203673 | 425 | samples_to_send -= sending_now; |
3b203673 | 426 | |
c07f60e7 BV |
427 | /* Logic */ |
428 | logic_generator(sdi, sending_now * devc->logic_unitsize); | |
3b203673 AG |
429 | packet.type = SR_DF_LOGIC; |
430 | packet.payload = &logic; | |
c07f60e7 BV |
431 | logic.length = sending_now * devc->logic_unitsize; |
432 | logic.unitsize = devc->logic_unitsize; | |
61c39f54 | 433 | logic.data = devc->logic_data; |
c07f60e7 | 434 | sr_session_send(sdi, &packet); |
3b203673 AG |
435 | devc->samples_counter += sending_now; |
436 | } | |
437 | ||
a7684294 JH |
438 | if (devc->limit_samples && |
439 | devc->samples_counter >= devc->limit_samples) { | |
35e199da | 440 | sr_info("Requested number of samples reached."); |
61c39f54 | 441 | dev_acquisition_stop(sdi, cb_data); |
c216d623 | 442 | return TRUE; |
85b5af06 | 443 | } |
1924f59f | 444 | |
85b5af06 UH |
445 | return TRUE; |
446 | } | |
447 | ||
6078d2c9 | 448 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) |
6239c175 | 449 | { |
61c39f54 | 450 | struct dev_context *devc; |
85b5af06 | 451 | |
e73ffd42 BV |
452 | if (sdi->status != SR_ST_ACTIVE) |
453 | return SR_ERR_DEV_CLOSED; | |
454 | ||
61c39f54 | 455 | devc = sdi->priv; |
b4750a3a | 456 | devc->samples_counter = 0; |
85b5af06 | 457 | |
3b203673 AG |
458 | /* |
459 | * Setting two channels connected by a pipe is a remnant from when the | |
460 | * demo driver generated data in a thread, and collected and sent the | |
461 | * data in the main program loop. | |
462 | * They are kept here because it provides a convenient way of setting | |
463 | * up a timeout-based polling mechanism. | |
464 | */ | |
b4750a3a | 465 | if (pipe(devc->pipe_fds)) { |
92bcedf6 | 466 | sr_err("%s: pipe() failed", __func__); |
e46b8fb1 | 467 | return SR_ERR; |
c03ed397 | 468 | } |
85b5af06 | 469 | |
e0532047 | 470 | devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]); |
d35aaf02 | 471 | |
e0532047 | 472 | g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); |
e6e8f8e0 | 473 | |
d35aaf02 | 474 | /* Set channel encoding to binary (default is UTF-8). */ |
e0532047 | 475 | g_io_channel_set_encoding(devc->channel, NULL, NULL); |
d35aaf02 UH |
476 | |
477 | /* Make channels to unbuffered. */ | |
e0532047 | 478 | g_io_channel_set_buffered(devc->channel, FALSE); |
d35aaf02 | 479 | |
e0532047 | 480 | sr_session_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR, |
61c39f54 | 481 | 40, prepare_data, (void *)sdi); |
85b5af06 | 482 | |
4afdfd46 | 483 | /* Send header packet to the session bus. */ |
29a27196 | 484 | std_session_send_df_header(cb_data, LOG_PREFIX); |
f366e86c | 485 | |
3b203673 AG |
486 | /* We use this timestamp to decide how many more samples to send. */ |
487 | devc->starttime = g_get_monotonic_time(); | |
488 | ||
e46b8fb1 | 489 | return SR_OK; |
6239c175 UH |
490 | } |
491 | ||
6078d2c9 | 492 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) |
6239c175 | 493 | { |
33ef7573 | 494 | struct dev_context *const devc = sdi->priv; |
c216d623 | 495 | struct sr_datafeed_packet packet; |
7fd3e859 | 496 | |
33ef7573 | 497 | (void)cb_data; |
7fd3e859 | 498 | |
49145a63 AG |
499 | sr_dbg("Stopping aquisition."); |
500 | ||
e0532047 JH |
501 | sr_session_source_remove_channel(devc->channel); |
502 | g_io_channel_shutdown(devc->channel, FALSE, NULL); | |
2150a69b JH |
503 | g_io_channel_unref(devc->channel); |
504 | devc->channel = NULL; | |
c216d623 AG |
505 | |
506 | /* Send last packet. */ | |
507 | packet.type = SR_DF_END; | |
c07f60e7 | 508 | sr_session_send(sdi, &packet); |
7fd3e859 | 509 | |
3010f21c | 510 | return SR_OK; |
6239c175 UH |
511 | } |
512 | ||
c09f0b57 | 513 | SR_PRIV struct sr_dev_driver demo_driver_info = { |
e519ba86 UH |
514 | .name = "demo", |
515 | .longname = "Demo driver and pattern generator", | |
516 | .api_version = 1, | |
6078d2c9 UH |
517 | .init = init, |
518 | .cleanup = cleanup, | |
519 | .scan = scan, | |
520 | .dev_list = dev_list, | |
3b412e3a | 521 | .dev_clear = dev_clear, |
035a1078 BV |
522 | .config_get = config_get, |
523 | .config_set = config_set, | |
a1c743fc | 524 | .config_list = config_list, |
6078d2c9 UH |
525 | .dev_open = dev_open, |
526 | .dev_close = dev_close, | |
527 | .dev_acquisition_start = dev_acquisition_start, | |
528 | .dev_acquisition_stop = dev_acquisition_stop, | |
b4750a3a | 529 | .priv = NULL, |
6239c175 | 530 | }; |