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6239c175 UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
fc96e6f8 | 5 | * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com> |
6239c175 UH |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
85b5af06 | 23 | #include <unistd.h> |
6239c175 UH |
24 | #include <string.h> |
25 | #include <sigrok.h> | |
4af22da5 | 26 | #include <sigrok-internal.h> |
d35aaf02 UH |
27 | #ifdef _WIN32 |
28 | #include <io.h> | |
29 | #include <fcntl.h> | |
30 | #define pipe(fds) _pipe(fds, 4096, _O_BINARY) | |
31 | #endif | |
6239c175 UH |
32 | #include "config.h" |
33 | ||
e15f48c2 BV |
34 | #define NUM_PROBES 8 |
35 | #define DEMONAME "Demo device" | |
36 | /* size of chunks to send through the session bus */ | |
37 | #define BUFSIZE 4096 | |
85b5af06 | 38 | |
e15f48c2 | 39 | enum { |
917e0e71 | 40 | GENMODE_DEFAULT, |
e15f48c2 BV |
41 | GENMODE_RANDOM, |
42 | GENMODE_INC, | |
43 | }; | |
85b5af06 | 44 | |
29cbfeaf | 45 | /* FIXME: Should not be global. */ |
d35aaf02 UH |
46 | GIOChannel *channels[2]; |
47 | ||
e15f48c2 BV |
48 | struct databag { |
49 | int pipe_fds[2]; | |
50 | uint8_t sample_generator; | |
51 | uint8_t thread_running; | |
52 | uint64_t samples_counter; | |
53 | int device_index; | |
e15f48c2 | 54 | gpointer session_device_id; |
b9cc3629 | 55 | GTimer *timer; |
e15f48c2 | 56 | }; |
85b5af06 | 57 | |
6239c175 | 58 | static int capabilities[] = { |
5a2326a7 | 59 | SR_HWCAP_LOGIC_ANALYZER, |
4bfbf9fc | 60 | SR_HWCAP_SAMPLERATE, |
5a2326a7 UH |
61 | SR_HWCAP_PATTERN_MODE, |
62 | SR_HWCAP_LIMIT_SAMPLES, | |
63 | SR_HWCAP_LIMIT_MSEC, | |
64 | SR_HWCAP_CONTINUOUS, | |
6239c175 UH |
65 | }; |
66 | ||
4bfbf9fc | 67 | static struct sr_samplerates samplerates = { |
c9140419 | 68 | SR_HZ(1), |
59df0c77 | 69 | SR_GHZ(1), |
c9140419 | 70 | SR_HZ(1), |
4bfbf9fc BV |
71 | NULL, |
72 | }; | |
73 | ||
02440dd8 | 74 | static const char *patternmodes[] = { |
e15f48c2 BV |
75 | "random", |
76 | "incremental", | |
02440dd8 | 77 | NULL, |
85b5af06 UH |
78 | }; |
79 | ||
917e0e71 BV |
80 | static uint8_t genmode_default[] = { |
81 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, | |
82 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
83 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
84 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
85 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
86 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
87 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
88 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
89 | }; | |
90 | ||
a00ba012 | 91 | /* List of struct sr_device_instance, maintained by opendev()/closedev(). */ |
85b5af06 | 92 | static GSList *device_instances = NULL; |
59df0c77 | 93 | static uint64_t cur_samplerate = SR_KHZ(200); |
b9cc3629 BV |
94 | static uint64_t limit_samples = 0; |
95 | static uint64_t limit_msec = 0; | |
917e0e71 | 96 | static int default_genmode = GENMODE_DEFAULT; |
b9cc3629 BV |
97 | static GThread *my_thread; |
98 | static int thread_running; | |
6239c175 | 99 | |
6239c175 UH |
100 | static void hw_stop_acquisition(int device_index, gpointer session_device_id); |
101 | ||
54ac5277 | 102 | static int hw_init(const char *deviceinfo) |
6239c175 | 103 | { |
a00ba012 | 104 | struct sr_device_instance *sdi; |
85b5af06 | 105 | |
e15f48c2 BV |
106 | /* Avoid compiler warnings. */ |
107 | deviceinfo = deviceinfo; | |
85b5af06 | 108 | |
5a2326a7 | 109 | sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL); |
85b5af06 UH |
110 | if (!sdi) |
111 | return 0; | |
e15f48c2 | 112 | |
85b5af06 UH |
113 | device_instances = g_slist_append(device_instances, sdi); |
114 | ||
115 | return 1; | |
6239c175 UH |
116 | } |
117 | ||
118 | static int hw_opendev(int device_index) | |
119 | { | |
17e1afcb | 120 | /* Avoid compiler warnings. */ |
6239c175 UH |
121 | device_index = device_index; |
122 | ||
123 | /* Nothing needed so far. */ | |
697785d1 | 124 | |
e46b8fb1 | 125 | return SR_OK; |
6239c175 UH |
126 | } |
127 | ||
697785d1 | 128 | static int hw_closedev(int device_index) |
6239c175 | 129 | { |
17e1afcb | 130 | /* Avoid compiler warnings. */ |
6239c175 UH |
131 | device_index = device_index; |
132 | ||
133 | /* Nothing needed so far. */ | |
697785d1 UH |
134 | |
135 | return SR_OK; | |
6239c175 UH |
136 | } |
137 | ||
138 | static void hw_cleanup(void) | |
139 | { | |
140 | /* Nothing needed so far. */ | |
141 | } | |
142 | ||
143 | static void *hw_get_device_info(int device_index, int device_info_id) | |
144 | { | |
a00ba012 | 145 | struct sr_device_instance *sdi; |
85b5af06 UH |
146 | void *info = NULL; |
147 | ||
d32d961d | 148 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
85b5af06 UH |
149 | return NULL; |
150 | ||
6239c175 | 151 | switch (device_info_id) { |
5a2326a7 | 152 | case SR_DI_INSTANCE: |
85b5af06 | 153 | info = sdi; |
6239c175 | 154 | break; |
5a2326a7 | 155 | case SR_DI_NUM_PROBES: |
6239c175 UH |
156 | info = GINT_TO_POINTER(NUM_PROBES); |
157 | break; | |
4bfbf9fc BV |
158 | case SR_DI_SAMPLERATES: |
159 | info = &samplerates; | |
160 | break; | |
5a2326a7 | 161 | case SR_DI_CUR_SAMPLERATE: |
6239c175 UH |
162 | info = &cur_samplerate; |
163 | break; | |
5a2326a7 | 164 | case SR_DI_PATTERNMODES: |
e15f48c2 BV |
165 | info = &patternmodes; |
166 | break; | |
6239c175 UH |
167 | } |
168 | ||
169 | return info; | |
170 | } | |
171 | ||
172 | static int hw_get_status(int device_index) | |
173 | { | |
17e1afcb | 174 | /* Avoid compiler warnings. */ |
6239c175 | 175 | device_index = device_index; |
5096c6a6 | 176 | |
5a2326a7 | 177 | return SR_ST_ACTIVE; |
6239c175 UH |
178 | } |
179 | ||
180 | static int *hw_get_capabilities(void) | |
181 | { | |
182 | return capabilities; | |
183 | } | |
184 | ||
185 | static int hw_set_configuration(int device_index, int capability, void *value) | |
186 | { | |
187 | int ret; | |
85b5af06 | 188 | uint64_t *tmp_u64; |
e15f48c2 | 189 | char *stropt; |
6239c175 | 190 | |
17e1afcb | 191 | /* Avoid compiler warnings. */ |
6239c175 UH |
192 | device_index = device_index; |
193 | ||
5a2326a7 | 194 | if (capability == SR_HWCAP_PROBECONFIG) { |
d81d2933 BV |
195 | /* Nothing to do, but must be supported */ |
196 | ret = SR_OK; | |
197 | } else if (capability == SR_HWCAP_SAMPLERATE) { | |
198 | tmp_u64 = value; | |
199 | cur_samplerate = *tmp_u64; | |
6f422264 UH |
200 | sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__, |
201 | cur_samplerate); | |
e46b8fb1 | 202 | ret = SR_OK; |
5a2326a7 | 203 | } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { |
85b5af06 UH |
204 | tmp_u64 = value; |
205 | limit_samples = *tmp_u64; | |
6f422264 UH |
206 | sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__, |
207 | limit_samples); | |
e46b8fb1 | 208 | ret = SR_OK; |
5a2326a7 | 209 | } else if (capability == SR_HWCAP_LIMIT_MSEC) { |
b9cc3629 BV |
210 | tmp_u64 = value; |
211 | limit_msec = *tmp_u64; | |
6f422264 UH |
212 | sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__, |
213 | limit_msec); | |
e46b8fb1 | 214 | ret = SR_OK; |
5a2326a7 | 215 | } else if (capability == SR_HWCAP_PATTERN_MODE) { |
e15f48c2 BV |
216 | stropt = value; |
217 | if (!strcmp(stropt, "random")) { | |
218 | default_genmode = GENMODE_RANDOM; | |
e46b8fb1 | 219 | ret = SR_OK; |
e15f48c2 BV |
220 | } else if (!strcmp(stropt, "incremental")) { |
221 | default_genmode = GENMODE_INC; | |
e46b8fb1 | 222 | ret = SR_OK; |
e15f48c2 | 223 | } else { |
e46b8fb1 | 224 | ret = SR_ERR; |
e15f48c2 | 225 | } |
6f422264 UH |
226 | sr_dbg("demo: %s: setting patternmode to %d", __func__, |
227 | default_genmode); | |
6239c175 | 228 | } else { |
e46b8fb1 | 229 | ret = SR_ERR; |
6239c175 UH |
230 | } |
231 | ||
232 | return ret; | |
233 | } | |
234 | ||
5096c6a6 | 235 | static void samples_generator(uint8_t *buf, uint64_t size, void *data) |
85b5af06 | 236 | { |
cddd1c5f | 237 | static uint64_t p = 0; |
85b5af06 | 238 | struct databag *mydata = data; |
cddd1c5f | 239 | uint64_t i; |
85b5af06 | 240 | |
5096c6a6 | 241 | memset(buf, 0, size); |
85b5af06 UH |
242 | |
243 | switch (mydata->sample_generator) { | |
917e0e71 | 244 | case GENMODE_DEFAULT: |
917e0e71 BV |
245 | for (i = 0; i < size; i++) { |
246 | *(buf + i) = ~(genmode_default[p] >> 1); | |
247 | if (++p == 64) | |
248 | p = 0; | |
249 | } | |
250 | break; | |
85b5af06 | 251 | case GENMODE_RANDOM: /* Random */ |
5096c6a6 UH |
252 | for (i = 0; i < size; i++) |
253 | *(buf + i) = (uint8_t)(rand() & 0xff); | |
85b5af06 UH |
254 | break; |
255 | case GENMODE_INC: /* Simple increment */ | |
5096c6a6 | 256 | for (i = 0; i < size; i++) |
85b5af06 UH |
257 | *(buf + i) = i; |
258 | break; | |
259 | } | |
260 | } | |
261 | ||
262 | /* Thread function */ | |
263 | static void thread_func(void *data) | |
264 | { | |
265 | struct databag *mydata = data; | |
266 | uint8_t buf[BUFSIZE]; | |
267 | uint64_t nb_to_send = 0; | |
d35aaf02 | 268 | int bytes_written; |
1924f59f HE |
269 | |
270 | double time_cur, time_last, time_diff; | |
271 | ||
272 | time_last = g_timer_elapsed(mydata->timer, NULL); | |
85b5af06 UH |
273 | |
274 | while (thread_running) { | |
1924f59f HE |
275 | /* Rate control */ |
276 | time_cur = g_timer_elapsed(mydata->timer, NULL); | |
277 | ||
278 | time_diff = time_cur - time_last; | |
279 | time_last = time_cur; | |
280 | ||
281 | nb_to_send = cur_samplerate * time_diff; | |
282 | ||
ba3d481b | 283 | if (limit_samples) |
1924f59f HE |
284 | nb_to_send = MIN(nb_to_send, |
285 | limit_samples - mydata->samples_counter); | |
286 | ||
287 | /* Make sure we don't overflow. */ | |
288 | nb_to_send = MIN(nb_to_send, BUFSIZE); | |
289 | ||
290 | if (nb_to_send) { | |
291 | samples_generator(buf, nb_to_send, data); | |
292 | mydata->samples_counter += nb_to_send; | |
070befcd BV |
293 | |
294 | g_io_channel_write_chars(channels[1], (gchar *)&buf, | |
295 | nb_to_send, (gsize *)&bytes_written, NULL); | |
b9cc3629 BV |
296 | } |
297 | ||
1924f59f HE |
298 | /* Check if we're done. */ |
299 | if ((limit_msec && time_cur * 1000 > limit_msec) || | |
300 | (limit_samples && mydata->samples_counter >= limit_samples)) | |
301 | { | |
85b5af06 UH |
302 | close(mydata->pipe_fds[1]); |
303 | thread_running = 0; | |
85b5af06 UH |
304 | } |
305 | ||
1924f59f | 306 | g_usleep(10); |
85b5af06 UH |
307 | } |
308 | } | |
309 | ||
310 | /* Callback handling data */ | |
311 | static int receive_data(int fd, int revents, void *user_data) | |
312 | { | |
b9c735a2 | 313 | struct sr_datafeed_packet packet; |
26ce0bbf | 314 | char c[BUFSIZE]; |
108a5bfb | 315 | gsize z; |
1924f59f | 316 | |
26ce0bbf UH |
317 | /* Avoid compiler warnings. */ |
318 | fd = fd; | |
319 | revents = revents; | |
1924f59f HE |
320 | |
321 | do { | |
322 | g_io_channel_read_chars(channels[0], | |
070befcd | 323 | (gchar *)&c, BUFSIZE, &z, NULL); |
1924f59f HE |
324 | |
325 | if (z > 0) { | |
5a2326a7 | 326 | packet.type = SR_DF_LOGIC; |
1924f59f HE |
327 | packet.length = z; |
328 | packet.unitsize = 1; | |
329 | packet.payload = c; | |
8a2efef2 | 330 | sr_session_bus(user_data, &packet); |
1924f59f HE |
331 | } |
332 | } while (z > 0); | |
85b5af06 | 333 | |
1924f59f HE |
334 | if (!thread_running && z <= 0) |
335 | { | |
336 | /* Make sure we don't receive more packets */ | |
337 | g_io_channel_close(channels[0]); | |
d35aaf02 | 338 | |
1924f59f | 339 | /* Send last packet. */ |
5a2326a7 | 340 | packet.type = SR_DF_END; |
8a2efef2 | 341 | sr_session_bus(user_data, &packet); |
1924f59f HE |
342 | |
343 | return FALSE; | |
85b5af06 | 344 | } |
1924f59f | 345 | |
85b5af06 UH |
346 | return TRUE; |
347 | } | |
348 | ||
6239c175 UH |
349 | static int hw_start_acquisition(int device_index, gpointer session_device_id) |
350 | { | |
b9c735a2 UH |
351 | struct sr_datafeed_packet *packet; |
352 | struct sr_datafeed_header *header; | |
85b5af06 | 353 | struct databag *mydata; |
6239c175 | 354 | |
27a3a6fe UH |
355 | /* TODO: 'mydata' is never g_free()'d? */ |
356 | if (!(mydata = g_try_malloc(sizeof(struct databag)))) { | |
357 | sr_err("demo: %s: mydata malloc failed", __func__); | |
e46b8fb1 | 358 | return SR_ERR_MALLOC; |
27a3a6fe | 359 | } |
85b5af06 | 360 | |
e15f48c2 | 361 | mydata->sample_generator = default_genmode; |
85b5af06 UH |
362 | mydata->session_device_id = session_device_id; |
363 | mydata->device_index = device_index; | |
364 | mydata->samples_counter = 0; | |
85b5af06 | 365 | |
e15f48c2 | 366 | if (pipe(mydata->pipe_fds)) |
e46b8fb1 | 367 | return SR_ERR; |
85b5af06 | 368 | |
d35aaf02 UH |
369 | channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]); |
370 | channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]); | |
371 | ||
372 | /* Set channel encoding to binary (default is UTF-8). */ | |
373 | g_io_channel_set_encoding(channels[0], NULL, NULL); | |
374 | g_io_channel_set_encoding(channels[1], NULL, NULL); | |
375 | ||
376 | /* Make channels to unbuffered. */ | |
377 | g_io_channel_set_buffered(channels[0], FALSE); | |
378 | g_io_channel_set_buffered(channels[1], FALSE); | |
379 | ||
6f1be0a2 UH |
380 | sr_source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, |
381 | receive_data, session_device_id); | |
85b5af06 UH |
382 | |
383 | /* Run the demo thread. */ | |
384 | g_thread_init(NULL); | |
cddd1c5f | 385 | /* this needs to be done between g_thread_init() and g_thread_create() */ |
1924f59f | 386 | mydata->timer = g_timer_new(); |
85b5af06 UH |
387 | thread_running = 1; |
388 | my_thread = | |
389 | g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL); | |
e15f48c2 | 390 | if (!my_thread) |
e46b8fb1 | 391 | return SR_ERR; |
6239c175 | 392 | |
27a3a6fe UH |
393 | if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { |
394 | sr_err("demo: %s: packet malloc failed", __func__); | |
e46b8fb1 | 395 | return SR_ERR_MALLOC; |
27a3a6fe UH |
396 | } |
397 | ||
398 | if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { | |
399 | sr_err("demo: %s: header malloc failed", __func__); | |
400 | return SR_ERR_MALLOC; | |
401 | } | |
6239c175 | 402 | |
5a2326a7 | 403 | packet->type = SR_DF_HEADER; |
b9c735a2 | 404 | packet->length = sizeof(struct sr_datafeed_header); |
6239c175 UH |
405 | packet->payload = (unsigned char *)header; |
406 | header->feed_version = 1; | |
407 | gettimeofday(&header->starttime, NULL); | |
408 | header->samplerate = cur_samplerate; | |
5a2326a7 | 409 | header->protocol_id = SR_PROTO_RAW; |
c2616fb9 DR |
410 | header->num_logic_probes = NUM_PROBES; |
411 | header->num_analog_probes = 0; | |
8a2efef2 | 412 | sr_session_bus(session_device_id, packet); |
27a3a6fe UH |
413 | g_free(header); |
414 | g_free(packet); | |
6239c175 | 415 | |
e46b8fb1 | 416 | return SR_OK; |
6239c175 UH |
417 | } |
418 | ||
6239c175 UH |
419 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) |
420 | { | |
17e1afcb | 421 | /* Avoid compiler warnings. */ |
6239c175 | 422 | device_index = device_index; |
1924f59f | 423 | session_device_id = session_device_id; |
6239c175 | 424 | |
1924f59f HE |
425 | /* Stop generate thread. */ |
426 | thread_running = 0; | |
6239c175 UH |
427 | } |
428 | ||
5c2d46d1 | 429 | struct sr_device_plugin demo_plugin_info = { |
e519ba86 UH |
430 | .name = "demo", |
431 | .longname = "Demo driver and pattern generator", | |
432 | .api_version = 1, | |
433 | .init = hw_init, | |
434 | .cleanup = hw_cleanup, | |
86f5e3d8 UH |
435 | .opendev = hw_opendev, |
436 | .closedev = hw_closedev, | |
e519ba86 UH |
437 | .get_device_info = hw_get_device_info, |
438 | .get_status = hw_get_status, | |
439 | .get_capabilities = hw_get_capabilities, | |
440 | .set_configuration = hw_set_configuration, | |
441 | .start_acquisition = hw_start_acquisition, | |
442 | .stop_acquisition = hw_stop_acquisition, | |
6239c175 | 443 | }; |