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