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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. */ | |
e46b8fb1 | 124 | return SR_OK; |
6239c175 UH |
125 | } |
126 | ||
127 | static void hw_closedev(int device_index) | |
128 | { | |
17e1afcb | 129 | /* Avoid compiler warnings. */ |
6239c175 UH |
130 | device_index = device_index; |
131 | ||
132 | /* Nothing needed so far. */ | |
133 | } | |
134 | ||
135 | static void hw_cleanup(void) | |
136 | { | |
137 | /* Nothing needed so far. */ | |
138 | } | |
139 | ||
140 | static void *hw_get_device_info(int device_index, int device_info_id) | |
141 | { | |
a00ba012 | 142 | struct sr_device_instance *sdi; |
85b5af06 UH |
143 | void *info = NULL; |
144 | ||
d32d961d | 145 | if (!(sdi = sr_get_device_instance(device_instances, device_index))) |
85b5af06 UH |
146 | return NULL; |
147 | ||
6239c175 | 148 | switch (device_info_id) { |
5a2326a7 | 149 | case SR_DI_INSTANCE: |
85b5af06 | 150 | info = sdi; |
6239c175 | 151 | break; |
5a2326a7 | 152 | case SR_DI_NUM_PROBES: |
6239c175 UH |
153 | info = GINT_TO_POINTER(NUM_PROBES); |
154 | break; | |
4bfbf9fc BV |
155 | case SR_DI_SAMPLERATES: |
156 | info = &samplerates; | |
157 | break; | |
5a2326a7 | 158 | case SR_DI_CUR_SAMPLERATE: |
6239c175 UH |
159 | info = &cur_samplerate; |
160 | break; | |
5a2326a7 | 161 | case SR_DI_PATTERNMODES: |
e15f48c2 BV |
162 | info = &patternmodes; |
163 | break; | |
6239c175 UH |
164 | } |
165 | ||
166 | return info; | |
167 | } | |
168 | ||
169 | static int hw_get_status(int device_index) | |
170 | { | |
17e1afcb | 171 | /* Avoid compiler warnings. */ |
6239c175 | 172 | device_index = device_index; |
5096c6a6 | 173 | |
5a2326a7 | 174 | return SR_ST_ACTIVE; |
6239c175 UH |
175 | } |
176 | ||
177 | static int *hw_get_capabilities(void) | |
178 | { | |
179 | return capabilities; | |
180 | } | |
181 | ||
182 | static int hw_set_configuration(int device_index, int capability, void *value) | |
183 | { | |
184 | int ret; | |
85b5af06 | 185 | uint64_t *tmp_u64; |
e15f48c2 | 186 | char *stropt; |
6239c175 | 187 | |
17e1afcb | 188 | /* Avoid compiler warnings. */ |
6239c175 UH |
189 | device_index = device_index; |
190 | ||
5a2326a7 | 191 | if (capability == SR_HWCAP_PROBECONFIG) { |
d81d2933 BV |
192 | /* Nothing to do, but must be supported */ |
193 | ret = SR_OK; | |
194 | } else if (capability == SR_HWCAP_SAMPLERATE) { | |
195 | tmp_u64 = value; | |
196 | cur_samplerate = *tmp_u64; | |
e46b8fb1 | 197 | ret = SR_OK; |
5a2326a7 | 198 | } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { |
85b5af06 UH |
199 | tmp_u64 = value; |
200 | limit_samples = *tmp_u64; | |
e46b8fb1 | 201 | ret = SR_OK; |
5a2326a7 | 202 | } else if (capability == SR_HWCAP_LIMIT_MSEC) { |
b9cc3629 BV |
203 | tmp_u64 = value; |
204 | limit_msec = *tmp_u64; | |
e46b8fb1 | 205 | ret = SR_OK; |
5a2326a7 | 206 | } else if (capability == SR_HWCAP_PATTERN_MODE) { |
e15f48c2 BV |
207 | stropt = value; |
208 | if (!strcmp(stropt, "random")) { | |
209 | default_genmode = GENMODE_RANDOM; | |
e46b8fb1 | 210 | ret = SR_OK; |
e15f48c2 BV |
211 | } else if (!strcmp(stropt, "incremental")) { |
212 | default_genmode = GENMODE_INC; | |
e46b8fb1 | 213 | ret = SR_OK; |
e15f48c2 | 214 | } else { |
e46b8fb1 | 215 | ret = SR_ERR; |
e15f48c2 | 216 | } |
6239c175 | 217 | } else { |
e46b8fb1 | 218 | ret = SR_ERR; |
6239c175 UH |
219 | } |
220 | ||
221 | return ret; | |
222 | } | |
223 | ||
5096c6a6 | 224 | static void samples_generator(uint8_t *buf, uint64_t size, void *data) |
85b5af06 | 225 | { |
cddd1c5f | 226 | static uint64_t p = 0; |
85b5af06 | 227 | struct databag *mydata = data; |
cddd1c5f | 228 | uint64_t i; |
85b5af06 | 229 | |
5096c6a6 | 230 | memset(buf, 0, size); |
85b5af06 UH |
231 | |
232 | switch (mydata->sample_generator) { | |
917e0e71 | 233 | case GENMODE_DEFAULT: |
917e0e71 BV |
234 | for (i = 0; i < size; i++) { |
235 | *(buf + i) = ~(genmode_default[p] >> 1); | |
236 | if (++p == 64) | |
237 | p = 0; | |
238 | } | |
239 | break; | |
85b5af06 | 240 | case GENMODE_RANDOM: /* Random */ |
5096c6a6 UH |
241 | for (i = 0; i < size; i++) |
242 | *(buf + i) = (uint8_t)(rand() & 0xff); | |
85b5af06 UH |
243 | break; |
244 | case GENMODE_INC: /* Simple increment */ | |
5096c6a6 | 245 | for (i = 0; i < size; i++) |
85b5af06 UH |
246 | *(buf + i) = i; |
247 | break; | |
248 | } | |
249 | } | |
250 | ||
251 | /* Thread function */ | |
252 | static void thread_func(void *data) | |
253 | { | |
254 | struct databag *mydata = data; | |
255 | uint8_t buf[BUFSIZE]; | |
256 | uint64_t nb_to_send = 0; | |
d35aaf02 | 257 | int bytes_written; |
1924f59f HE |
258 | |
259 | double time_cur, time_last, time_diff; | |
260 | ||
261 | time_last = g_timer_elapsed(mydata->timer, NULL); | |
85b5af06 UH |
262 | |
263 | while (thread_running) { | |
1924f59f HE |
264 | /* Rate control */ |
265 | time_cur = g_timer_elapsed(mydata->timer, NULL); | |
266 | ||
267 | time_diff = time_cur - time_last; | |
268 | time_last = time_cur; | |
269 | ||
270 | nb_to_send = cur_samplerate * time_diff; | |
271 | ||
ba3d481b | 272 | if (limit_samples) |
1924f59f HE |
273 | nb_to_send = MIN(nb_to_send, |
274 | limit_samples - mydata->samples_counter); | |
275 | ||
276 | /* Make sure we don't overflow. */ | |
277 | nb_to_send = MIN(nb_to_send, BUFSIZE); | |
278 | ||
279 | if (nb_to_send) { | |
280 | samples_generator(buf, nb_to_send, data); | |
281 | mydata->samples_counter += nb_to_send; | |
070befcd BV |
282 | |
283 | g_io_channel_write_chars(channels[1], (gchar *)&buf, | |
284 | nb_to_send, (gsize *)&bytes_written, NULL); | |
b9cc3629 BV |
285 | } |
286 | ||
1924f59f HE |
287 | /* Check if we're done. */ |
288 | if ((limit_msec && time_cur * 1000 > limit_msec) || | |
289 | (limit_samples && mydata->samples_counter >= limit_samples)) | |
290 | { | |
85b5af06 UH |
291 | close(mydata->pipe_fds[1]); |
292 | thread_running = 0; | |
85b5af06 UH |
293 | } |
294 | ||
1924f59f | 295 | g_usleep(10); |
85b5af06 UH |
296 | } |
297 | } | |
298 | ||
299 | /* Callback handling data */ | |
300 | static int receive_data(int fd, int revents, void *user_data) | |
301 | { | |
b9c735a2 | 302 | struct sr_datafeed_packet packet; |
26ce0bbf | 303 | char c[BUFSIZE]; |
108a5bfb | 304 | gsize z; |
1924f59f | 305 | |
26ce0bbf UH |
306 | /* Avoid compiler warnings. */ |
307 | fd = fd; | |
308 | revents = revents; | |
1924f59f HE |
309 | |
310 | do { | |
311 | g_io_channel_read_chars(channels[0], | |
070befcd | 312 | (gchar *)&c, BUFSIZE, &z, NULL); |
1924f59f HE |
313 | |
314 | if (z > 0) { | |
5a2326a7 | 315 | packet.type = SR_DF_LOGIC; |
1924f59f HE |
316 | packet.length = z; |
317 | packet.unitsize = 1; | |
318 | packet.payload = c; | |
8a2efef2 | 319 | sr_session_bus(user_data, &packet); |
1924f59f HE |
320 | } |
321 | } while (z > 0); | |
85b5af06 | 322 | |
1924f59f HE |
323 | if (!thread_running && z <= 0) |
324 | { | |
325 | /* Make sure we don't receive more packets */ | |
326 | g_io_channel_close(channels[0]); | |
d35aaf02 | 327 | |
1924f59f | 328 | /* Send last packet. */ |
5a2326a7 | 329 | packet.type = SR_DF_END; |
8a2efef2 | 330 | sr_session_bus(user_data, &packet); |
1924f59f HE |
331 | |
332 | return FALSE; | |
85b5af06 | 333 | } |
1924f59f | 334 | |
85b5af06 UH |
335 | return TRUE; |
336 | } | |
337 | ||
6239c175 UH |
338 | static int hw_start_acquisition(int device_index, gpointer session_device_id) |
339 | { | |
b9c735a2 UH |
340 | struct sr_datafeed_packet *packet; |
341 | struct sr_datafeed_header *header; | |
85b5af06 | 342 | struct databag *mydata; |
6239c175 | 343 | |
27a3a6fe UH |
344 | /* TODO: 'mydata' is never g_free()'d? */ |
345 | if (!(mydata = g_try_malloc(sizeof(struct databag)))) { | |
346 | sr_err("demo: %s: mydata malloc failed", __func__); | |
e46b8fb1 | 347 | return SR_ERR_MALLOC; |
27a3a6fe | 348 | } |
85b5af06 | 349 | |
e15f48c2 | 350 | mydata->sample_generator = default_genmode; |
85b5af06 UH |
351 | mydata->session_device_id = session_device_id; |
352 | mydata->device_index = device_index; | |
353 | mydata->samples_counter = 0; | |
85b5af06 | 354 | |
e15f48c2 | 355 | if (pipe(mydata->pipe_fds)) |
e46b8fb1 | 356 | return SR_ERR; |
85b5af06 | 357 | |
d35aaf02 UH |
358 | channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]); |
359 | channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]); | |
360 | ||
361 | /* Set channel encoding to binary (default is UTF-8). */ | |
362 | g_io_channel_set_encoding(channels[0], NULL, NULL); | |
363 | g_io_channel_set_encoding(channels[1], NULL, NULL); | |
364 | ||
365 | /* Make channels to unbuffered. */ | |
366 | g_io_channel_set_buffered(channels[0], FALSE); | |
367 | g_io_channel_set_buffered(channels[1], FALSE); | |
368 | ||
6f1be0a2 UH |
369 | sr_source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, |
370 | receive_data, session_device_id); | |
85b5af06 UH |
371 | |
372 | /* Run the demo thread. */ | |
373 | g_thread_init(NULL); | |
cddd1c5f | 374 | /* this needs to be done between g_thread_init() and g_thread_create() */ |
1924f59f | 375 | mydata->timer = g_timer_new(); |
85b5af06 UH |
376 | thread_running = 1; |
377 | my_thread = | |
378 | g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL); | |
e15f48c2 | 379 | if (!my_thread) |
e46b8fb1 | 380 | return SR_ERR; |
6239c175 | 381 | |
27a3a6fe UH |
382 | if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { |
383 | sr_err("demo: %s: packet malloc failed", __func__); | |
e46b8fb1 | 384 | return SR_ERR_MALLOC; |
27a3a6fe UH |
385 | } |
386 | ||
387 | if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { | |
388 | sr_err("demo: %s: header malloc failed", __func__); | |
389 | return SR_ERR_MALLOC; | |
390 | } | |
6239c175 | 391 | |
5a2326a7 | 392 | packet->type = SR_DF_HEADER; |
b9c735a2 | 393 | packet->length = sizeof(struct sr_datafeed_header); |
6239c175 UH |
394 | packet->payload = (unsigned char *)header; |
395 | header->feed_version = 1; | |
396 | gettimeofday(&header->starttime, NULL); | |
397 | header->samplerate = cur_samplerate; | |
5a2326a7 | 398 | header->protocol_id = SR_PROTO_RAW; |
c2616fb9 DR |
399 | header->num_logic_probes = NUM_PROBES; |
400 | header->num_analog_probes = 0; | |
8a2efef2 | 401 | sr_session_bus(session_device_id, packet); |
27a3a6fe UH |
402 | g_free(header); |
403 | g_free(packet); | |
6239c175 | 404 | |
e46b8fb1 | 405 | return SR_OK; |
6239c175 UH |
406 | } |
407 | ||
6239c175 UH |
408 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) |
409 | { | |
17e1afcb | 410 | /* Avoid compiler warnings. */ |
6239c175 | 411 | device_index = device_index; |
1924f59f | 412 | session_device_id = session_device_id; |
6239c175 | 413 | |
1924f59f HE |
414 | /* Stop generate thread. */ |
415 | thread_running = 0; | |
6239c175 UH |
416 | } |
417 | ||
5c2d46d1 | 418 | struct sr_device_plugin demo_plugin_info = { |
e519ba86 UH |
419 | .name = "demo", |
420 | .longname = "Demo driver and pattern generator", | |
421 | .api_version = 1, | |
422 | .init = hw_init, | |
423 | .cleanup = hw_cleanup, | |
424 | .open = hw_opendev, | |
425 | .close = hw_closedev, | |
426 | .get_device_info = hw_get_device_info, | |
427 | .get_status = hw_get_status, | |
428 | .get_capabilities = hw_get_capabilities, | |
429 | .set_configuration = hw_set_configuration, | |
430 | .start_acquisition = hw_start_acquisition, | |
431 | .stop_acquisition = hw_stop_acquisition, | |
6239c175 | 432 | }; |