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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 | |
29a27196 UH |
34 | /* Message logging helpers with subsystem-specific prefix string. */ |
35 | #define LOG_PREFIX "demo: " | |
36 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
37 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
38 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
39 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
40 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
41 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
92bcedf6 | 42 | |
c03ed397 | 43 | /* TODO: Number of probes should be configurable. */ |
e15f48c2 | 44 | #define NUM_PROBES 8 |
c03ed397 | 45 | |
e15f48c2 | 46 | #define DEMONAME "Demo device" |
c03ed397 UH |
47 | |
48 | /* The size of chunks to send through the session bus. */ | |
49 | /* TODO: Should be configurable. */ | |
e15f48c2 | 50 | #define BUFSIZE 4096 |
85b5af06 | 51 | |
2474d87e BV |
52 | #define STR_PATTERN_SIGROK "sigrok" |
53 | #define STR_PATTERN_RANDOM "random" | |
54 | #define STR_PATTERN_INC "incremental" | |
55 | #define STR_PATTERN_ALL_LOW "all-low" | |
56 | #define STR_PATTERN_ALL_HIGH "all-high" | |
57 | ||
0d31276b | 58 | /* Supported patterns which we can generate */ |
e15f48c2 | 59 | enum { |
0d31276b UH |
60 | /** |
61 | * Pattern which spells "sigrok" using '0's (with '1's as "background") | |
62 | * when displayed using the 'bits' output format. | |
63 | */ | |
c8f4624d | 64 | PATTERN_SIGROK, |
0d31276b | 65 | |
c03ed397 | 66 | /** Pattern which consists of (pseudo-)random values on all probes. */ |
c8f4624d | 67 | PATTERN_RANDOM, |
0d31276b UH |
68 | |
69 | /** | |
70 | * Pattern which consists of incrementing numbers. | |
71 | * TODO: Better description. | |
72 | */ | |
c8f4624d | 73 | PATTERN_INC, |
c03ed397 UH |
74 | |
75 | /** Pattern where all probes have a low logic state. */ | |
76 | PATTERN_ALL_LOW, | |
77 | ||
78 | /** Pattern where all probes have a high logic state. */ | |
79 | PATTERN_ALL_HIGH, | |
e15f48c2 | 80 | }; |
85b5af06 | 81 | |
b4750a3a BV |
82 | /* Private, per-device-instance driver context. */ |
83 | struct dev_context { | |
33ef7573 | 84 | struct sr_dev_inst *sdi; |
e15f48c2 | 85 | int pipe_fds[2]; |
e0532047 | 86 | GIOChannel *channel; |
a7684294 JH |
87 | uint64_t cur_samplerate; |
88 | uint64_t limit_samples; | |
89 | uint64_t limit_msec; | |
e15f48c2 | 90 | uint8_t sample_generator; |
e15f48c2 | 91 | uint64_t samples_counter; |
3e9b7f9c | 92 | void *cb_data; |
3b203673 | 93 | int64_t starttime; |
e15f48c2 | 94 | }; |
85b5af06 | 95 | |
915f7cc8 | 96 | static const int hwcaps[] = { |
1953564a BV |
97 | SR_CONF_LOGIC_ANALYZER, |
98 | SR_CONF_DEMO_DEV, | |
99 | SR_CONF_SAMPLERATE, | |
100 | SR_CONF_PATTERN_MODE, | |
101 | SR_CONF_LIMIT_SAMPLES, | |
102 | SR_CONF_LIMIT_MSEC, | |
103 | SR_CONF_CONTINUOUS, | |
6239c175 UH |
104 | }; |
105 | ||
d00088ca BV |
106 | static const uint64_t samplerates[] = { |
107 | SR_HZ(1), | |
108 | SR_GHZ(1), | |
109 | SR_HZ(1), | |
4bfbf9fc BV |
110 | }; |
111 | ||
c8f4624d | 112 | static const char *pattern_strings[] = { |
c03ed397 | 113 | "sigrok", |
e15f48c2 BV |
114 | "random", |
115 | "incremental", | |
c03ed397 UH |
116 | "all-low", |
117 | "all-high", | |
85b5af06 UH |
118 | }; |
119 | ||
d261dbbf | 120 | /* We name the probes 0-7 on our demo driver. */ |
464d12c7 | 121 | static const char *probe_names[NUM_PROBES + 1] = { |
78693401 | 122 | "0", "1", "2", "3", "4", "5", "6", "7", |
464d12c7 KS |
123 | NULL, |
124 | }; | |
125 | ||
c8f4624d | 126 | static uint8_t pattern_sigrok[] = { |
917e0e71 BV |
127 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, |
128 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
129 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
130 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
131 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
132 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
133 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
134 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
135 | }; | |
136 | ||
ea9cfed7 UH |
137 | /* Private, per-device-instance driver context. */ |
138 | /* TODO: struct context as with the other drivers. */ | |
139 | ||
e7eb703f | 140 | /* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */ |
dcf03d6d | 141 | SR_PRIV struct sr_dev_driver demo_driver_info; |
a873c594 | 142 | static struct sr_dev_driver *di = &demo_driver_info; |
6239c175 | 143 | |
6078d2c9 | 144 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); |
6239c175 | 145 | |
3b412e3a | 146 | static int dev_clear(void) |
eebb6067 | 147 | { |
1c2d542d | 148 | return std_dev_clear(di, NULL); |
eebb6067 UH |
149 | } |
150 | ||
6078d2c9 | 151 | static int init(struct sr_context *sr_ctx) |
61136ea6 | 152 | { |
f6beaac5 | 153 | return std_init(sr_ctx, di, LOG_PREFIX); |
61136ea6 BV |
154 | } |
155 | ||
6078d2c9 | 156 | static GSList *scan(GSList *options) |
6239c175 | 157 | { |
d68e2d1a | 158 | struct sr_dev_inst *sdi; |
87ca93c5 | 159 | struct sr_probe *probe; |
b4750a3a | 160 | struct drv_context *drvc; |
33ef7573 | 161 | struct dev_context *devc; |
067d0716 | 162 | GSList *devices; |
87ca93c5 | 163 | int i; |
067d0716 BV |
164 | |
165 | (void)options; | |
64d33dc2 | 166 | |
a873c594 | 167 | drvc = di->priv; |
4b97c74e | 168 | |
067d0716 | 169 | devices = NULL; |
85b5af06 | 170 | |
d3683c42 | 171 | sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL); |
c03ed397 | 172 | if (!sdi) { |
e45ad6e2 UH |
173 | sr_err("Device instance creation failed."); |
174 | return NULL; | |
c03ed397 | 175 | } |
a873c594 | 176 | sdi->driver = di; |
e15f48c2 | 177 | |
87ca93c5 | 178 | for (i = 0; probe_names[i]; i++) { |
de6e0eca | 179 | if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, |
87ca93c5 BV |
180 | probe_names[i]))) |
181 | return NULL; | |
182 | sdi->probes = g_slist_append(sdi->probes, probe); | |
183 | } | |
184 | ||
067d0716 | 185 | devices = g_slist_append(devices, sdi); |
b4750a3a | 186 | drvc->instances = g_slist_append(drvc->instances, sdi); |
85b5af06 | 187 | |
33ef7573 | 188 | if (!(devc = g_try_malloc(sizeof(struct dev_context)))) { |
e45ad6e2 UH |
189 | sr_err("Device context malloc failed."); |
190 | return NULL; | |
33ef7573 JH |
191 | } |
192 | ||
193 | devc->sdi = sdi; | |
a7684294 JH |
194 | devc->cur_samplerate = SR_KHZ(200); |
195 | devc->limit_samples = 0; | |
196 | devc->limit_msec = 0; | |
197 | devc->sample_generator = PATTERN_SIGROK; | |
33ef7573 JH |
198 | |
199 | sdi->priv = devc; | |
200 | ||
067d0716 | 201 | return devices; |
6239c175 UH |
202 | } |
203 | ||
6078d2c9 | 204 | static GSList *dev_list(void) |
811deee4 | 205 | { |
0e94d524 | 206 | return ((struct drv_context *)(di->priv))->instances; |
811deee4 BV |
207 | } |
208 | ||
6078d2c9 | 209 | static int dev_open(struct sr_dev_inst *sdi) |
6239c175 | 210 | { |
e73ffd42 | 211 | sdi->status = SR_ST_ACTIVE; |
697785d1 | 212 | |
e46b8fb1 | 213 | return SR_OK; |
6239c175 UH |
214 | } |
215 | ||
6078d2c9 | 216 | static int dev_close(struct sr_dev_inst *sdi) |
6239c175 | 217 | { |
decfe89d | 218 | sdi->status = SR_ST_INACTIVE; |
697785d1 UH |
219 | |
220 | return SR_OK; | |
6239c175 UH |
221 | } |
222 | ||
6078d2c9 | 223 | static int cleanup(void) |
6239c175 | 224 | { |
1c2d542d | 225 | return dev_clear(); |
6239c175 UH |
226 | } |
227 | ||
8f996b89 ML |
228 | static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi, |
229 | const struct sr_probe_group *probe_group) | |
6239c175 | 230 | { |
a7684294 | 231 | struct dev_context *const devc = sdi->priv; |
6f57fd96 | 232 | |
8f996b89 ML |
233 | (void)probe_group; |
234 | ||
035a1078 | 235 | switch (id) { |
123e1313 | 236 | case SR_CONF_SAMPLERATE: |
a7684294 | 237 | *data = g_variant_new_uint64(devc->cur_samplerate); |
6239c175 | 238 | break; |
2474d87e | 239 | case SR_CONF_LIMIT_SAMPLES: |
a7684294 | 240 | *data = g_variant_new_uint64(devc->limit_samples); |
2474d87e BV |
241 | break; |
242 | case SR_CONF_LIMIT_MSEC: | |
a7684294 | 243 | *data = g_variant_new_uint64(devc->limit_msec); |
2474d87e BV |
244 | break; |
245 | case SR_CONF_PATTERN_MODE: | |
a7684294 | 246 | switch (devc->sample_generator) { |
2474d87e | 247 | case PATTERN_SIGROK: |
d00088ca | 248 | *data = g_variant_new_string(STR_PATTERN_SIGROK); |
2474d87e BV |
249 | break; |
250 | case PATTERN_RANDOM: | |
d00088ca | 251 | *data = g_variant_new_string(STR_PATTERN_RANDOM); |
2474d87e BV |
252 | break; |
253 | case PATTERN_INC: | |
d00088ca | 254 | *data = g_variant_new_string(STR_PATTERN_INC); |
2474d87e BV |
255 | break; |
256 | case PATTERN_ALL_LOW: | |
d00088ca | 257 | *data = g_variant_new_string(STR_PATTERN_ALL_LOW); |
2474d87e BV |
258 | break; |
259 | case PATTERN_ALL_HIGH: | |
d00088ca | 260 | *data = g_variant_new_string(STR_PATTERN_ALL_HIGH); |
2474d87e BV |
261 | break; |
262 | } | |
263 | break; | |
7dfcf010 | 264 | default: |
bd6fbf62 | 265 | return SR_ERR_NA; |
6239c175 UH |
266 | } |
267 | ||
dfb0fa1a | 268 | return SR_OK; |
6239c175 UH |
269 | } |
270 | ||
8f996b89 ML |
271 | static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi, |
272 | const struct sr_probe_group *probe_group) | |
6239c175 UH |
273 | { |
274 | int ret; | |
1b79df2f | 275 | const char *stropt; |
6239c175 | 276 | |
8f996b89 | 277 | (void)probe_group; |
a7684294 | 278 | struct dev_context *const devc = sdi->priv; |
6239c175 | 279 | |
e73ffd42 BV |
280 | if (sdi->status != SR_ST_ACTIVE) |
281 | return SR_ERR_DEV_CLOSED; | |
282 | ||
035a1078 | 283 | if (id == SR_CONF_SAMPLERATE) { |
a7684294 | 284 | devc->cur_samplerate = g_variant_get_uint64(data); |
92bcedf6 | 285 | sr_dbg("%s: setting samplerate to %" PRIu64, __func__, |
a7684294 | 286 | devc->cur_samplerate); |
e46b8fb1 | 287 | ret = SR_OK; |
035a1078 | 288 | } else if (id == SR_CONF_LIMIT_SAMPLES) { |
a7684294 JH |
289 | devc->limit_msec = 0; |
290 | devc->limit_samples = g_variant_get_uint64(data); | |
92bcedf6 | 291 | sr_dbg("%s: setting limit_samples to %" PRIu64, __func__, |
a7684294 | 292 | devc->limit_samples); |
e46b8fb1 | 293 | ret = SR_OK; |
035a1078 | 294 | } else if (id == SR_CONF_LIMIT_MSEC) { |
a7684294 JH |
295 | devc->limit_msec = g_variant_get_uint64(data); |
296 | devc->limit_samples = 0; | |
92bcedf6 | 297 | sr_dbg("%s: setting limit_msec to %" PRIu64, __func__, |
a7684294 | 298 | devc->limit_msec); |
e46b8fb1 | 299 | ret = SR_OK; |
035a1078 | 300 | } else if (id == SR_CONF_PATTERN_MODE) { |
d00088ca | 301 | stropt = g_variant_get_string(data, NULL); |
c03ed397 | 302 | ret = SR_OK; |
2474d87e | 303 | if (!strcmp(stropt, STR_PATTERN_SIGROK)) { |
a7684294 | 304 | devc->sample_generator = PATTERN_SIGROK; |
2474d87e | 305 | } else if (!strcmp(stropt, STR_PATTERN_RANDOM)) { |
a7684294 | 306 | devc->sample_generator = PATTERN_RANDOM; |
2474d87e | 307 | } else if (!strcmp(stropt, STR_PATTERN_INC)) { |
a7684294 | 308 | devc->sample_generator = PATTERN_INC; |
2474d87e | 309 | } else if (!strcmp(stropt, STR_PATTERN_ALL_LOW)) { |
a7684294 | 310 | devc->sample_generator = PATTERN_ALL_LOW; |
2474d87e | 311 | } else if (!strcmp(stropt, STR_PATTERN_ALL_HIGH)) { |
a7684294 | 312 | devc->sample_generator = PATTERN_ALL_HIGH; |
e15f48c2 | 313 | } else { |
e46b8fb1 | 314 | ret = SR_ERR; |
e15f48c2 | 315 | } |
a7684294 JH |
316 | sr_dbg("%s: setting pattern to %d", |
317 | __func__, devc->sample_generator); | |
6239c175 | 318 | } else { |
bd6fbf62 | 319 | ret = SR_ERR_NA; |
6239c175 UH |
320 | } |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
8f996b89 ML |
325 | static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi, |
326 | const struct sr_probe_group *probe_group) | |
a1c743fc | 327 | { |
d00088ca BV |
328 | GVariant *gvar; |
329 | GVariantBuilder gvb; | |
a1c743fc BV |
330 | |
331 | (void)sdi; | |
8f996b89 | 332 | (void)probe_group; |
a1c743fc BV |
333 | |
334 | switch (key) { | |
9a6517d1 | 335 | case SR_CONF_DEVICE_OPTIONS: |
d00088ca BV |
336 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, |
337 | hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); | |
9a6517d1 | 338 | break; |
a1c743fc | 339 | case SR_CONF_SAMPLERATE: |
d00088ca BV |
340 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); |
341 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, | |
342 | ARRAY_SIZE(samplerates), sizeof(uint64_t)); | |
343 | g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar); | |
344 | *data = g_variant_builder_end(&gvb); | |
a1c743fc | 345 | break; |
dd96ea98 | 346 | case SR_CONF_PATTERN_MODE: |
d00088ca | 347 | *data = g_variant_new_strv(pattern_strings, ARRAY_SIZE(pattern_strings)); |
dd96ea98 | 348 | break; |
a1c743fc | 349 | default: |
bd6fbf62 | 350 | return SR_ERR_NA; |
a1c743fc BV |
351 | } |
352 | ||
353 | return SR_OK; | |
354 | } | |
355 | ||
3b203673 AG |
356 | static void samples_generator(uint8_t *buf, uint64_t size, |
357 | struct dev_context *devc) | |
85b5af06 | 358 | { |
cddd1c5f | 359 | static uint64_t p = 0; |
cddd1c5f | 360 | uint64_t i; |
85b5af06 | 361 | |
c03ed397 | 362 | /* TODO: Needed? */ |
5096c6a6 | 363 | memset(buf, 0, size); |
85b5af06 | 364 | |
b4750a3a | 365 | switch (devc->sample_generator) { |
c03ed397 | 366 | case PATTERN_SIGROK: /* sigrok pattern */ |
917e0e71 | 367 | for (i = 0; i < size; i++) { |
bbd7ef0f JH |
368 | *(buf + i) = ~(pattern_sigrok[ |
369 | p++ % sizeof(pattern_sigrok)] >> 1); | |
917e0e71 BV |
370 | } |
371 | break; | |
c8f4624d | 372 | case PATTERN_RANDOM: /* Random */ |
5096c6a6 UH |
373 | for (i = 0; i < size; i++) |
374 | *(buf + i) = (uint8_t)(rand() & 0xff); | |
85b5af06 | 375 | break; |
c8f4624d | 376 | case PATTERN_INC: /* Simple increment */ |
5096c6a6 | 377 | for (i = 0; i < size; i++) |
bbd7ef0f | 378 | *(buf + i) = p++; |
85b5af06 | 379 | break; |
c03ed397 | 380 | case PATTERN_ALL_LOW: /* All probes are low */ |
5a9660dd | 381 | memset(buf, 0x00, size); |
c03ed397 UH |
382 | break; |
383 | case PATTERN_ALL_HIGH: /* All probes are high */ | |
5a9660dd | 384 | memset(buf, 0xff, size); |
c03ed397 UH |
385 | break; |
386 | default: | |
92bcedf6 | 387 | sr_err("Unknown pattern: %d.", devc->sample_generator); |
c03ed397 | 388 | break; |
85b5af06 UH |
389 | } |
390 | } | |
391 | ||
85b5af06 | 392 | /* Callback handling data */ |
1f9813eb | 393 | static int receive_data(int fd, int revents, void *cb_data) |
85b5af06 | 394 | { |
b4750a3a | 395 | struct dev_context *devc = cb_data; |
b9c735a2 | 396 | struct sr_datafeed_packet packet; |
9c939c51 | 397 | struct sr_datafeed_logic logic; |
3b203673 AG |
398 | uint8_t buf[BUFSIZE]; |
399 | static uint64_t samples_to_send, expected_samplenum, sending_now; | |
400 | int64_t time, elapsed; | |
1924f59f | 401 | |
cb93f8a9 UH |
402 | (void)fd; |
403 | (void)revents; | |
1924f59f | 404 | |
3b203673 AG |
405 | /* How many "virtual" samples should we have collected by now? */ |
406 | time = g_get_monotonic_time(); | |
407 | elapsed = time - devc->starttime; | |
a7684294 | 408 | expected_samplenum = elapsed * devc->cur_samplerate / 1000000; |
3b203673 AG |
409 | /* Of those, how many do we still have to send? */ |
410 | samples_to_send = expected_samplenum - devc->samples_counter; | |
411 | ||
a7684294 | 412 | if (devc->limit_samples) { |
3b203673 | 413 | samples_to_send = MIN(samples_to_send, |
a7684294 | 414 | devc->limit_samples - devc->samples_counter); |
3b203673 | 415 | } |
85b5af06 | 416 | |
3b203673 AG |
417 | while (samples_to_send > 0) { |
418 | sending_now = MIN(samples_to_send, sizeof(buf)); | |
419 | samples_to_send -= sending_now; | |
420 | samples_generator(buf, sending_now, devc); | |
421 | ||
422 | packet.type = SR_DF_LOGIC; | |
423 | packet.payload = &logic; | |
424 | logic.length = sending_now; | |
425 | logic.unitsize = 1; | |
426 | logic.data = buf; | |
3e9b7f9c | 427 | sr_session_send(devc->cb_data, &packet); |
3b203673 AG |
428 | devc->samples_counter += sending_now; |
429 | } | |
430 | ||
a7684294 JH |
431 | if (devc->limit_samples && |
432 | devc->samples_counter >= devc->limit_samples) { | |
35e199da | 433 | sr_info("Requested number of samples reached."); |
6078d2c9 | 434 | dev_acquisition_stop(devc->sdi, cb_data); |
c216d623 | 435 | return TRUE; |
85b5af06 | 436 | } |
1924f59f | 437 | |
85b5af06 UH |
438 | return TRUE; |
439 | } | |
440 | ||
6078d2c9 | 441 | static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) |
6239c175 | 442 | { |
33ef7573 | 443 | struct dev_context *const devc = sdi->priv; |
85b5af06 | 444 | |
e73ffd42 BV |
445 | if (sdi->status != SR_ST_ACTIVE) |
446 | return SR_ERR_DEV_CLOSED; | |
447 | ||
3e9b7f9c | 448 | devc->cb_data = cb_data; |
b4750a3a | 449 | devc->samples_counter = 0; |
85b5af06 | 450 | |
3b203673 AG |
451 | /* |
452 | * Setting two channels connected by a pipe is a remnant from when the | |
453 | * demo driver generated data in a thread, and collected and sent the | |
454 | * data in the main program loop. | |
455 | * They are kept here because it provides a convenient way of setting | |
456 | * up a timeout-based polling mechanism. | |
457 | */ | |
b4750a3a | 458 | if (pipe(devc->pipe_fds)) { |
c03ed397 | 459 | /* TODO: Better error message. */ |
92bcedf6 | 460 | sr_err("%s: pipe() failed", __func__); |
e46b8fb1 | 461 | return SR_ERR; |
c03ed397 | 462 | } |
85b5af06 | 463 | |
e0532047 | 464 | devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]); |
d35aaf02 | 465 | |
e0532047 | 466 | g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL); |
e6e8f8e0 | 467 | |
d35aaf02 | 468 | /* Set channel encoding to binary (default is UTF-8). */ |
e0532047 | 469 | g_io_channel_set_encoding(devc->channel, NULL, NULL); |
d35aaf02 UH |
470 | |
471 | /* Make channels to unbuffered. */ | |
e0532047 | 472 | g_io_channel_set_buffered(devc->channel, FALSE); |
d35aaf02 | 473 | |
e0532047 | 474 | sr_session_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR, |
b4750a3a | 475 | 40, receive_data, devc); |
85b5af06 | 476 | |
4afdfd46 | 477 | /* Send header packet to the session bus. */ |
29a27196 | 478 | std_session_send_df_header(cb_data, LOG_PREFIX); |
f366e86c | 479 | |
3b203673 AG |
480 | /* We use this timestamp to decide how many more samples to send. */ |
481 | devc->starttime = g_get_monotonic_time(); | |
482 | ||
e46b8fb1 | 483 | return SR_OK; |
6239c175 UH |
484 | } |
485 | ||
6078d2c9 | 486 | static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) |
6239c175 | 487 | { |
33ef7573 | 488 | struct dev_context *const devc = sdi->priv; |
c216d623 | 489 | struct sr_datafeed_packet packet; |
7fd3e859 | 490 | |
33ef7573 | 491 | (void)cb_data; |
7fd3e859 | 492 | |
49145a63 AG |
493 | sr_dbg("Stopping aquisition."); |
494 | ||
e0532047 JH |
495 | sr_session_source_remove_channel(devc->channel); |
496 | g_io_channel_shutdown(devc->channel, FALSE, NULL); | |
2150a69b JH |
497 | g_io_channel_unref(devc->channel); |
498 | devc->channel = NULL; | |
c216d623 AG |
499 | |
500 | /* Send last packet. */ | |
501 | packet.type = SR_DF_END; | |
3e9b7f9c | 502 | sr_session_send(devc->cb_data, &packet); |
7fd3e859 | 503 | |
3010f21c | 504 | return SR_OK; |
6239c175 UH |
505 | } |
506 | ||
c09f0b57 | 507 | SR_PRIV struct sr_dev_driver demo_driver_info = { |
e519ba86 UH |
508 | .name = "demo", |
509 | .longname = "Demo driver and pattern generator", | |
510 | .api_version = 1, | |
6078d2c9 UH |
511 | .init = init, |
512 | .cleanup = cleanup, | |
513 | .scan = scan, | |
514 | .dev_list = dev_list, | |
3b412e3a | 515 | .dev_clear = dev_clear, |
035a1078 BV |
516 | .config_get = config_get, |
517 | .config_set = config_set, | |
a1c743fc | 518 | .config_list = config_list, |
6078d2c9 UH |
519 | .dev_open = dev_open, |
520 | .dev_close = dev_close, | |
521 | .dev_acquisition_start = dev_acquisition_start, | |
522 | .dev_acquisition_stop = dev_acquisition_stop, | |
b4750a3a | 523 | .priv = NULL, |
6239c175 | 524 | }; |