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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> | |
d35aaf02 UH |
26 | #ifdef _WIN32 |
27 | #include <io.h> | |
28 | #include <fcntl.h> | |
29 | #define pipe(fds) _pipe(fds, 4096, _O_BINARY) | |
30 | #endif | |
6239c175 UH |
31 | #include "config.h" |
32 | ||
e15f48c2 BV |
33 | #define NUM_PROBES 8 |
34 | #define DEMONAME "Demo device" | |
35 | /* size of chunks to send through the session bus */ | |
36 | #define BUFSIZE 4096 | |
85b5af06 | 37 | |
e15f48c2 | 38 | enum { |
917e0e71 | 39 | GENMODE_DEFAULT, |
e15f48c2 BV |
40 | GENMODE_RANDOM, |
41 | GENMODE_INC, | |
42 | }; | |
85b5af06 | 43 | |
d35aaf02 UH |
44 | GIOChannel *channels[2]; |
45 | ||
e15f48c2 BV |
46 | struct databag { |
47 | int pipe_fds[2]; | |
48 | uint8_t sample_generator; | |
49 | uint8_t thread_running; | |
50 | uint64_t samples_counter; | |
51 | int device_index; | |
e15f48c2 | 52 | gpointer session_device_id; |
b9cc3629 | 53 | GTimer *timer; |
e15f48c2 | 54 | }; |
85b5af06 | 55 | |
6239c175 | 56 | static int capabilities[] = { |
5a2326a7 | 57 | SR_HWCAP_LOGIC_ANALYZER, |
4bfbf9fc | 58 | SR_HWCAP_SAMPLERATE, |
5a2326a7 UH |
59 | SR_HWCAP_PATTERN_MODE, |
60 | SR_HWCAP_LIMIT_SAMPLES, | |
61 | SR_HWCAP_LIMIT_MSEC, | |
62 | SR_HWCAP_CONTINUOUS, | |
6239c175 UH |
63 | }; |
64 | ||
4bfbf9fc BV |
65 | static struct sr_samplerates samplerates = { |
66 | 1, | |
67 | GHZ(1), | |
68 | 1, | |
69 | NULL, | |
70 | }; | |
71 | ||
02440dd8 | 72 | static const char *patternmodes[] = { |
e15f48c2 BV |
73 | "random", |
74 | "incremental", | |
02440dd8 | 75 | NULL, |
85b5af06 UH |
76 | }; |
77 | ||
917e0e71 BV |
78 | static uint8_t genmode_default[] = { |
79 | 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, | |
80 | 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, | |
81 | 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, | |
82 | 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, | |
83 | 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, | |
84 | 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, | |
85 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
86 | 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
87 | }; | |
88 | ||
a00ba012 | 89 | /* List of struct sr_device_instance, maintained by opendev()/closedev(). */ |
85b5af06 | 90 | static GSList *device_instances = NULL; |
1924f59f | 91 | static uint64_t cur_samplerate = KHZ(200); |
b9cc3629 BV |
92 | static uint64_t limit_samples = 0; |
93 | static uint64_t limit_msec = 0; | |
917e0e71 | 94 | static int default_genmode = GENMODE_DEFAULT; |
b9cc3629 BV |
95 | static GThread *my_thread; |
96 | static int thread_running; | |
6239c175 | 97 | |
6239c175 UH |
98 | static void hw_stop_acquisition(int device_index, gpointer session_device_id); |
99 | ||
6239c175 UH |
100 | static int hw_init(char *deviceinfo) |
101 | { | |
a00ba012 | 102 | struct sr_device_instance *sdi; |
85b5af06 | 103 | |
e15f48c2 BV |
104 | /* Avoid compiler warnings. */ |
105 | deviceinfo = deviceinfo; | |
85b5af06 | 106 | |
5a2326a7 | 107 | sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL); |
85b5af06 UH |
108 | if (!sdi) |
109 | return 0; | |
e15f48c2 | 110 | |
85b5af06 UH |
111 | device_instances = g_slist_append(device_instances, sdi); |
112 | ||
113 | return 1; | |
6239c175 UH |
114 | } |
115 | ||
116 | static int hw_opendev(int device_index) | |
117 | { | |
17e1afcb | 118 | /* Avoid compiler warnings. */ |
6239c175 UH |
119 | device_index = device_index; |
120 | ||
121 | /* Nothing needed so far. */ | |
e46b8fb1 | 122 | return SR_OK; |
6239c175 UH |
123 | } |
124 | ||
125 | static void hw_closedev(int device_index) | |
126 | { | |
17e1afcb | 127 | /* Avoid compiler warnings. */ |
6239c175 UH |
128 | device_index = device_index; |
129 | ||
130 | /* Nothing needed so far. */ | |
131 | } | |
132 | ||
133 | static void hw_cleanup(void) | |
134 | { | |
135 | /* Nothing needed so far. */ | |
136 | } | |
137 | ||
138 | static void *hw_get_device_info(int device_index, int device_info_id) | |
139 | { | |
a00ba012 | 140 | struct sr_device_instance *sdi; |
85b5af06 UH |
141 | void *info = NULL; |
142 | ||
d32d961d | 143 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
85b5af06 UH |
144 | return NULL; |
145 | ||
6239c175 | 146 | switch (device_info_id) { |
5a2326a7 | 147 | case SR_DI_INSTANCE: |
85b5af06 | 148 | info = sdi; |
6239c175 | 149 | break; |
5a2326a7 | 150 | case SR_DI_NUM_PROBES: |
6239c175 UH |
151 | info = GINT_TO_POINTER(NUM_PROBES); |
152 | break; | |
4bfbf9fc BV |
153 | case SR_DI_SAMPLERATES: |
154 | info = &samplerates; | |
155 | break; | |
5a2326a7 | 156 | case SR_DI_CUR_SAMPLERATE: |
6239c175 UH |
157 | info = &cur_samplerate; |
158 | break; | |
5a2326a7 | 159 | case SR_DI_PATTERNMODES: |
e15f48c2 BV |
160 | info = &patternmodes; |
161 | break; | |
6239c175 UH |
162 | } |
163 | ||
164 | return info; | |
165 | } | |
166 | ||
167 | static int hw_get_status(int device_index) | |
168 | { | |
17e1afcb | 169 | /* Avoid compiler warnings. */ |
6239c175 | 170 | device_index = device_index; |
5096c6a6 | 171 | |
5a2326a7 | 172 | return SR_ST_ACTIVE; |
6239c175 UH |
173 | } |
174 | ||
175 | static int *hw_get_capabilities(void) | |
176 | { | |
177 | return capabilities; | |
178 | } | |
179 | ||
180 | static int hw_set_configuration(int device_index, int capability, void *value) | |
181 | { | |
182 | int ret; | |
85b5af06 | 183 | uint64_t *tmp_u64; |
e15f48c2 | 184 | char *stropt; |
6239c175 | 185 | |
17e1afcb | 186 | /* Avoid compiler warnings. */ |
6239c175 UH |
187 | device_index = device_index; |
188 | ||
5a2326a7 | 189 | if (capability == SR_HWCAP_PROBECONFIG) { |
d81d2933 BV |
190 | /* Nothing to do, but must be supported */ |
191 | ret = SR_OK; | |
192 | } else if (capability == SR_HWCAP_SAMPLERATE) { | |
193 | tmp_u64 = value; | |
194 | cur_samplerate = *tmp_u64; | |
e46b8fb1 | 195 | ret = SR_OK; |
5a2326a7 | 196 | } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { |
85b5af06 UH |
197 | tmp_u64 = value; |
198 | limit_samples = *tmp_u64; | |
e46b8fb1 | 199 | ret = SR_OK; |
5a2326a7 | 200 | } else if (capability == SR_HWCAP_LIMIT_MSEC) { |
b9cc3629 BV |
201 | tmp_u64 = value; |
202 | limit_msec = *tmp_u64; | |
e46b8fb1 | 203 | ret = SR_OK; |
5a2326a7 | 204 | } else if (capability == SR_HWCAP_PATTERN_MODE) { |
e15f48c2 BV |
205 | stropt = value; |
206 | if (!strcmp(stropt, "random")) { | |
207 | default_genmode = GENMODE_RANDOM; | |
e46b8fb1 | 208 | ret = SR_OK; |
e15f48c2 BV |
209 | } else if (!strcmp(stropt, "incremental")) { |
210 | default_genmode = GENMODE_INC; | |
e46b8fb1 | 211 | ret = SR_OK; |
e15f48c2 | 212 | } else { |
e46b8fb1 | 213 | ret = SR_ERR; |
e15f48c2 | 214 | } |
6239c175 | 215 | } else { |
e46b8fb1 | 216 | ret = SR_ERR; |
6239c175 UH |
217 | } |
218 | ||
219 | return ret; | |
220 | } | |
221 | ||
5096c6a6 | 222 | static void samples_generator(uint8_t *buf, uint64_t size, void *data) |
85b5af06 | 223 | { |
cddd1c5f | 224 | static uint64_t p = 0; |
85b5af06 | 225 | struct databag *mydata = data; |
cddd1c5f | 226 | uint64_t i; |
85b5af06 | 227 | |
5096c6a6 | 228 | memset(buf, 0, size); |
85b5af06 UH |
229 | |
230 | switch (mydata->sample_generator) { | |
917e0e71 | 231 | case GENMODE_DEFAULT: |
917e0e71 BV |
232 | for (i = 0; i < size; i++) { |
233 | *(buf + i) = ~(genmode_default[p] >> 1); | |
234 | if (++p == 64) | |
235 | p = 0; | |
236 | } | |
237 | break; | |
85b5af06 | 238 | case GENMODE_RANDOM: /* Random */ |
5096c6a6 UH |
239 | for (i = 0; i < size; i++) |
240 | *(buf + i) = (uint8_t)(rand() & 0xff); | |
85b5af06 UH |
241 | break; |
242 | case GENMODE_INC: /* Simple increment */ | |
5096c6a6 | 243 | for (i = 0; i < size; i++) |
85b5af06 UH |
244 | *(buf + i) = i; |
245 | break; | |
246 | } | |
247 | } | |
248 | ||
249 | /* Thread function */ | |
250 | static void thread_func(void *data) | |
251 | { | |
252 | struct databag *mydata = data; | |
253 | uint8_t buf[BUFSIZE]; | |
254 | uint64_t nb_to_send = 0; | |
d35aaf02 | 255 | int bytes_written; |
1924f59f HE |
256 | |
257 | double time_cur, time_last, time_diff; | |
258 | ||
259 | time_last = g_timer_elapsed(mydata->timer, NULL); | |
85b5af06 UH |
260 | |
261 | while (thread_running) { | |
1924f59f HE |
262 | /* Rate control */ |
263 | time_cur = g_timer_elapsed(mydata->timer, NULL); | |
264 | ||
265 | time_diff = time_cur - time_last; | |
266 | time_last = time_cur; | |
267 | ||
268 | nb_to_send = cur_samplerate * time_diff; | |
269 | ||
ba3d481b | 270 | if (limit_samples) |
1924f59f HE |
271 | nb_to_send = MIN(nb_to_send, |
272 | limit_samples - mydata->samples_counter); | |
273 | ||
274 | /* Make sure we don't overflow. */ | |
275 | nb_to_send = MIN(nb_to_send, BUFSIZE); | |
276 | ||
277 | if (nb_to_send) { | |
278 | samples_generator(buf, nb_to_send, data); | |
279 | mydata->samples_counter += nb_to_send; | |
070befcd BV |
280 | |
281 | g_io_channel_write_chars(channels[1], (gchar *)&buf, | |
282 | nb_to_send, (gsize *)&bytes_written, NULL); | |
b9cc3629 BV |
283 | } |
284 | ||
1924f59f HE |
285 | /* Check if we're done. */ |
286 | if ((limit_msec && time_cur * 1000 > limit_msec) || | |
287 | (limit_samples && mydata->samples_counter >= limit_samples)) | |
288 | { | |
85b5af06 UH |
289 | close(mydata->pipe_fds[1]); |
290 | thread_running = 0; | |
85b5af06 UH |
291 | } |
292 | ||
1924f59f | 293 | g_usleep(10); |
85b5af06 UH |
294 | } |
295 | } | |
296 | ||
297 | /* Callback handling data */ | |
298 | static int receive_data(int fd, int revents, void *user_data) | |
299 | { | |
b9c735a2 | 300 | struct sr_datafeed_packet packet; |
26ce0bbf | 301 | char c[BUFSIZE]; |
108a5bfb | 302 | gsize z; |
1924f59f | 303 | |
26ce0bbf UH |
304 | /* Avoid compiler warnings. */ |
305 | fd = fd; | |
306 | revents = revents; | |
1924f59f HE |
307 | |
308 | do { | |
309 | g_io_channel_read_chars(channels[0], | |
070befcd | 310 | (gchar *)&c, BUFSIZE, &z, NULL); |
1924f59f HE |
311 | |
312 | if (z > 0) { | |
5a2326a7 | 313 | packet.type = SR_DF_LOGIC; |
1924f59f HE |
314 | packet.length = z; |
315 | packet.unitsize = 1; | |
316 | packet.payload = c; | |
8a2efef2 | 317 | sr_session_bus(user_data, &packet); |
1924f59f HE |
318 | } |
319 | } while (z > 0); | |
85b5af06 | 320 | |
1924f59f HE |
321 | if (!thread_running && z <= 0) |
322 | { | |
323 | /* Make sure we don't receive more packets */ | |
324 | g_io_channel_close(channels[0]); | |
d35aaf02 | 325 | |
1924f59f | 326 | /* Send last packet. */ |
5a2326a7 | 327 | packet.type = SR_DF_END; |
8a2efef2 | 328 | sr_session_bus(user_data, &packet); |
1924f59f HE |
329 | |
330 | return FALSE; | |
85b5af06 | 331 | } |
1924f59f | 332 | |
85b5af06 UH |
333 | return TRUE; |
334 | } | |
335 | ||
6239c175 UH |
336 | static int hw_start_acquisition(int device_index, gpointer session_device_id) |
337 | { | |
b9c735a2 UH |
338 | struct sr_datafeed_packet *packet; |
339 | struct sr_datafeed_header *header; | |
85b5af06 | 340 | struct databag *mydata; |
6239c175 | 341 | |
85b5af06 | 342 | mydata = malloc(sizeof(struct databag)); |
5096c6a6 | 343 | if (!mydata) |
e46b8fb1 | 344 | return SR_ERR_MALLOC; |
85b5af06 | 345 | |
e15f48c2 | 346 | mydata->sample_generator = default_genmode; |
85b5af06 UH |
347 | mydata->session_device_id = session_device_id; |
348 | mydata->device_index = device_index; | |
349 | mydata->samples_counter = 0; | |
85b5af06 | 350 | |
e15f48c2 | 351 | if (pipe(mydata->pipe_fds)) |
e46b8fb1 | 352 | return SR_ERR; |
85b5af06 | 353 | |
d35aaf02 UH |
354 | channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]); |
355 | channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]); | |
356 | ||
357 | /* Set channel encoding to binary (default is UTF-8). */ | |
358 | g_io_channel_set_encoding(channels[0], NULL, NULL); | |
359 | g_io_channel_set_encoding(channels[1], NULL, NULL); | |
360 | ||
361 | /* Make channels to unbuffered. */ | |
362 | g_io_channel_set_buffered(channels[0], FALSE); | |
363 | g_io_channel_set_buffered(channels[1], FALSE); | |
364 | ||
85b5af06 UH |
365 | source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, receive_data, |
366 | session_device_id); | |
367 | ||
368 | /* Run the demo thread. */ | |
369 | g_thread_init(NULL); | |
cddd1c5f | 370 | /* this needs to be done between g_thread_init() and g_thread_create() */ |
1924f59f | 371 | mydata->timer = g_timer_new(); |
85b5af06 UH |
372 | thread_running = 1; |
373 | my_thread = | |
374 | g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL); | |
e15f48c2 | 375 | if (!my_thread) |
e46b8fb1 | 376 | return SR_ERR; |
6239c175 | 377 | |
b9c735a2 UH |
378 | packet = malloc(sizeof(struct sr_datafeed_packet)); |
379 | header = malloc(sizeof(struct sr_datafeed_header)); | |
e15f48c2 | 380 | if (!packet || !header) |
e46b8fb1 | 381 | return SR_ERR_MALLOC; |
6239c175 | 382 | |
5a2326a7 | 383 | packet->type = SR_DF_HEADER; |
b9c735a2 | 384 | packet->length = sizeof(struct sr_datafeed_header); |
6239c175 UH |
385 | packet->payload = (unsigned char *)header; |
386 | header->feed_version = 1; | |
387 | gettimeofday(&header->starttime, NULL); | |
388 | header->samplerate = cur_samplerate; | |
5a2326a7 | 389 | header->protocol_id = SR_PROTO_RAW; |
c2616fb9 DR |
390 | header->num_logic_probes = NUM_PROBES; |
391 | header->num_analog_probes = 0; | |
8a2efef2 | 392 | sr_session_bus(session_device_id, packet); |
6239c175 UH |
393 | free(header); |
394 | free(packet); | |
395 | ||
e46b8fb1 | 396 | return SR_OK; |
6239c175 UH |
397 | } |
398 | ||
6239c175 UH |
399 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) |
400 | { | |
17e1afcb | 401 | /* Avoid compiler warnings. */ |
6239c175 | 402 | device_index = device_index; |
1924f59f | 403 | session_device_id = session_device_id; |
6239c175 | 404 | |
1924f59f HE |
405 | /* Stop generate thread. */ |
406 | thread_running = 0; | |
6239c175 UH |
407 | } |
408 | ||
5c2d46d1 | 409 | struct sr_device_plugin demo_plugin_info = { |
6239c175 | 410 | "demo", |
9f8274a5 | 411 | "Demo driver and pattern generator", |
6239c175 UH |
412 | 1, |
413 | hw_init, | |
414 | hw_cleanup, | |
415 | hw_opendev, | |
416 | hw_closedev, | |
417 | hw_get_device_info, | |
418 | hw_get_status, | |
419 | hw_get_capabilities, | |
420 | hw_set_configuration, | |
421 | hw_start_acquisition, | |
422 | hw_stop_acquisition, | |
423 | }; |