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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | struct ols_basic_trigger_desc { | |
24 | uint32_t trigger_mask[NUM_BASIC_TRIGGER_STAGES]; | |
25 | uint32_t trigger_value[NUM_BASIC_TRIGGER_STAGES]; | |
26 | int num_stages; | |
27 | }; | |
28 | ||
29 | SR_PRIV int send_shortcommand(struct sr_serial_dev_inst *serial, | |
30 | uint8_t command) | |
31 | { | |
32 | char buf[1]; | |
33 | ||
34 | sr_dbg("Sending cmd 0x%.2x.", command); | |
35 | buf[0] = command; | |
36 | if (serial_write_blocking(serial, buf, 1, serial_timeout(serial, 1)) != 1) | |
37 | return SR_ERR; | |
38 | ||
39 | if (serial_drain(serial) != SR_OK) | |
40 | return SR_ERR; | |
41 | ||
42 | return SR_OK; | |
43 | } | |
44 | ||
45 | SR_PRIV int send_longcommand(struct sr_serial_dev_inst *serial, uint8_t command, | |
46 | uint8_t *data) | |
47 | { | |
48 | char buf[5]; | |
49 | ||
50 | sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command, data[0], | |
51 | data[1], data[2], data[3]); | |
52 | buf[0] = command; | |
53 | buf[1] = data[0]; | |
54 | buf[2] = data[1]; | |
55 | buf[3] = data[2]; | |
56 | buf[4] = data[3]; | |
57 | if (serial_write_blocking(serial, buf, 5, serial_timeout(serial, 1)) != 5) | |
58 | return SR_ERR; | |
59 | ||
60 | if (serial_drain(serial) != SR_OK) | |
61 | return SR_ERR; | |
62 | ||
63 | return SR_OK; | |
64 | } | |
65 | ||
66 | static int ols_send_longdata(struct sr_serial_dev_inst *serial, uint8_t command, | |
67 | uint32_t value) | |
68 | { | |
69 | uint8_t data[4]; | |
70 | WL32(data, value); | |
71 | return send_longcommand(serial, command, data); | |
72 | } | |
73 | ||
74 | SR_PRIV int ols_send_reset(struct sr_serial_dev_inst *serial) | |
75 | { | |
76 | unsigned int i; | |
77 | ||
78 | for (i = 0; i < 5; i++) { | |
79 | if (send_shortcommand(serial, CMD_RESET) != SR_OK) | |
80 | return SR_ERR; | |
81 | } | |
82 | ||
83 | return SR_OK; | |
84 | } | |
85 | ||
86 | /* Configures the channel mask based on which channels are enabled. */ | |
87 | SR_PRIV uint32_t ols_channel_mask(const struct sr_dev_inst *sdi) | |
88 | { | |
89 | uint32_t channel_mask = 0; | |
90 | for (const GSList *l = sdi->channels; l; l = l->next) { | |
91 | struct sr_channel *channel = l->data; | |
92 | if (channel->enabled) | |
93 | channel_mask |= 1 << channel->index; | |
94 | } | |
95 | ||
96 | return channel_mask; | |
97 | } | |
98 | ||
99 | static int convert_trigger(const struct sr_dev_inst *sdi, | |
100 | struct ols_basic_trigger_desc *ols_trigger) | |
101 | { | |
102 | struct sr_trigger *trigger; | |
103 | struct sr_trigger_stage *stage; | |
104 | struct sr_trigger_match *match; | |
105 | const GSList *l, *m; | |
106 | int i; | |
107 | ||
108 | ols_trigger->num_stages = 0; | |
109 | for (i = 0; i < NUM_BASIC_TRIGGER_STAGES; i++) { | |
110 | ols_trigger->trigger_mask[i] = 0; | |
111 | ols_trigger->trigger_value[i] = 0; | |
112 | } | |
113 | ||
114 | if (!(trigger = sr_session_trigger_get(sdi->session))) | |
115 | return SR_OK; | |
116 | ||
117 | ols_trigger->num_stages = g_slist_length(trigger->stages); | |
118 | if (ols_trigger->num_stages > NUM_BASIC_TRIGGER_STAGES) { | |
119 | sr_err("This device only supports %d trigger stages.", | |
120 | NUM_BASIC_TRIGGER_STAGES); | |
121 | return SR_ERR; | |
122 | } | |
123 | ||
124 | for (l = trigger->stages; l; l = l->next) { | |
125 | stage = l->data; | |
126 | for (m = stage->matches; m; m = m->next) { | |
127 | match = m->data; | |
128 | if (!match->channel->enabled) | |
129 | /* Ignore disabled channels with a trigger. */ | |
130 | continue; | |
131 | ols_trigger->trigger_mask[stage->stage] |= | |
132 | 1 << match->channel->index; | |
133 | if (match->match == SR_TRIGGER_ONE) | |
134 | ols_trigger->trigger_value[stage->stage] |= | |
135 | 1 << match->channel->index; | |
136 | } | |
137 | } | |
138 | ||
139 | return SR_OK; | |
140 | } | |
141 | ||
142 | static void ols_channel_new(struct sr_dev_inst *sdi, int num_chan) | |
143 | { | |
144 | struct dev_context *devc = sdi->priv; | |
145 | int i; | |
146 | ||
147 | for (i = 0; i < num_chan; i++) | |
148 | sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, | |
149 | ols_channel_names[i]); | |
150 | ||
151 | devc->max_channels = num_chan; | |
152 | } | |
153 | ||
154 | static void ols_metadata_quirks(struct sr_dev_inst *sdi) | |
155 | { | |
156 | struct dev_context *devc; | |
157 | gboolean is_shrimp; | |
158 | ||
159 | if (!sdi) | |
160 | return; | |
161 | devc = sdi->priv; | |
162 | if (!devc) | |
163 | return; | |
164 | ||
165 | is_shrimp = sdi->model && strcmp(sdi->model, "Shrimp1.0") == 0; | |
166 | if (is_shrimp) { | |
167 | if (!devc->max_channels) | |
168 | ols_channel_new(sdi, 4); | |
169 | if (!devc->max_samples) | |
170 | devc->max_samples = 256 * 1024; | |
171 | if (!devc->max_samplerate) | |
172 | devc->max_samplerate = SR_MHZ(20); | |
173 | } | |
174 | ||
175 | if (sdi->version && strstr(sdi->version, "FPGA version 3.07")) | |
176 | devc->device_flags |= DEVICE_FLAG_IS_DEMON_CORE; | |
177 | } | |
178 | ||
179 | SR_PRIV int ols_get_metadata(struct sr_dev_inst *sdi) | |
180 | { | |
181 | struct sr_serial_dev_inst *serial; | |
182 | struct dev_context *devc; | |
183 | uint32_t tmp_int; | |
184 | uint8_t key, type; | |
185 | int delay_ms; | |
186 | GString *tmp_str, *devname, *version; | |
187 | guchar tmp_c; | |
188 | ||
189 | serial = sdi->conn; | |
190 | devc = sdi->priv; | |
191 | ||
192 | devname = g_string_new(""); | |
193 | version = g_string_new(""); | |
194 | ||
195 | key = 0xff; | |
196 | while (key) { | |
197 | delay_ms = serial_timeout(serial, 1); | |
198 | if (serial_read_blocking(serial, &key, 1, delay_ms) != 1) | |
199 | break; | |
200 | if (key == METADATA_TOKEN_END) { | |
201 | sr_dbg("Got metadata key 0x00, metadata ends."); | |
202 | break; | |
203 | } | |
204 | type = key >> 5; | |
205 | switch (type) { | |
206 | case 0: | |
207 | /* NULL-terminated string */ | |
208 | tmp_str = g_string_new(""); | |
209 | delay_ms = serial_timeout(serial, 1); | |
210 | while (serial_read_blocking(serial, &tmp_c, 1, | |
211 | delay_ms) == 1 && | |
212 | tmp_c != '\0') | |
213 | g_string_append_c(tmp_str, tmp_c); | |
214 | sr_dbg("Got metadata token 0x%.2x value '%s'.", key, | |
215 | tmp_str->str); | |
216 | switch (key) { | |
217 | case METADATA_TOKEN_DEVICE_NAME: | |
218 | /* Device name */ | |
219 | devname = | |
220 | g_string_append(devname, tmp_str->str); | |
221 | break; | |
222 | case METADATA_TOKEN_FPGA_VERSION: | |
223 | /* FPGA firmware version */ | |
224 | if (version->len) | |
225 | g_string_append(version, ", "); | |
226 | g_string_append(version, "FPGA version "); | |
227 | g_string_append(version, tmp_str->str); | |
228 | break; | |
229 | case METADATA_TOKEN_ANCILLARY_VERSION: | |
230 | /* Ancillary version */ | |
231 | if (version->len) | |
232 | g_string_append(version, ", "); | |
233 | g_string_append(version, "Ancillary version "); | |
234 | g_string_append(version, tmp_str->str); | |
235 | break; | |
236 | default: | |
237 | sr_info("ols: unknown token 0x%.2x: '%s'", key, | |
238 | tmp_str->str); | |
239 | break; | |
240 | } | |
241 | g_string_free(tmp_str, TRUE); | |
242 | break; | |
243 | case 1: | |
244 | /* 32-bit unsigned integer */ | |
245 | delay_ms = serial_timeout(serial, 4); | |
246 | if (serial_read_blocking(serial, &tmp_int, 4, | |
247 | delay_ms) != 4) | |
248 | break; | |
249 | tmp_int = RB32(&tmp_int); | |
250 | sr_dbg("Got metadata token 0x%.2x value 0x%.8x.", key, | |
251 | tmp_int); | |
252 | switch (key) { | |
253 | case METADATA_TOKEN_NUM_PROBES_LONG: | |
254 | /* Number of usable channels */ | |
255 | ols_channel_new(sdi, tmp_int); | |
256 | break; | |
257 | case METADATA_TOKEN_SAMPLE_MEMORY_BYTES: | |
258 | /* Amount of sample memory available (bytes) */ | |
259 | devc->max_samples = tmp_int; | |
260 | break; | |
261 | case METADATA_TOKEN_DYNAMIC_MEMORY_BYTES: | |
262 | /* Amount of dynamic memory available (bytes) */ | |
263 | /* what is this for? */ | |
264 | break; | |
265 | case METADATA_TOKEN_MAX_SAMPLE_RATE_HZ: | |
266 | /* Maximum sample rate (Hz) */ | |
267 | devc->max_samplerate = tmp_int; | |
268 | break; | |
269 | case METADATA_TOKEN_PROTOCOL_VERSION_LONG: | |
270 | /* protocol version */ | |
271 | devc->protocol_version = tmp_int; | |
272 | break; | |
273 | default: | |
274 | sr_info("Unknown token 0x%.2x: 0x%.8x.", key, | |
275 | tmp_int); | |
276 | break; | |
277 | } | |
278 | break; | |
279 | case 2: | |
280 | /* 8-bit unsigned integer */ | |
281 | delay_ms = serial_timeout(serial, 1); | |
282 | if (serial_read_blocking(serial, &tmp_c, 1, delay_ms) != 1) | |
283 | break; | |
284 | sr_dbg("Got metadata token 0x%.2x value 0x%.2x.", key, | |
285 | tmp_c); | |
286 | switch (key) { | |
287 | case METADATA_TOKEN_NUM_PROBES_SHORT: | |
288 | /* Number of usable channels */ | |
289 | ols_channel_new(sdi, tmp_c); | |
290 | break; | |
291 | case METADATA_TOKEN_PROTOCOL_VERSION_SHORT: | |
292 | /* protocol version */ | |
293 | devc->protocol_version = tmp_c; | |
294 | break; | |
295 | default: | |
296 | sr_info("Unknown token 0x%.2x: 0x%.2x.", key, | |
297 | tmp_c); | |
298 | break; | |
299 | } | |
300 | break; | |
301 | default: | |
302 | /* unknown type */ | |
303 | break; | |
304 | } | |
305 | } | |
306 | ||
307 | sdi->model = devname->str; | |
308 | sdi->version = version->str; | |
309 | g_string_free(devname, FALSE); | |
310 | g_string_free(version, FALSE); | |
311 | ||
312 | /* Optionally amend received metadata, model specific quirks. */ | |
313 | ols_metadata_quirks(sdi); | |
314 | ||
315 | return SR_OK; | |
316 | } | |
317 | ||
318 | SR_PRIV int ols_set_samplerate(const struct sr_dev_inst *sdi, | |
319 | const uint64_t samplerate) | |
320 | { | |
321 | struct dev_context *devc; | |
322 | ||
323 | devc = sdi->priv; | |
324 | if (devc->max_samplerate && samplerate > devc->max_samplerate) | |
325 | return SR_ERR_SAMPLERATE; | |
326 | ||
327 | if (samplerate > CLOCK_RATE) { | |
328 | sr_info("Enabling demux mode."); | |
329 | devc->capture_flags |= CAPTURE_FLAG_DEMUX; | |
330 | devc->capture_flags &= ~CAPTURE_FLAG_NOISE_FILTER; | |
331 | devc->cur_samplerate_divider = | |
332 | (CLOCK_RATE * 2 / samplerate) - 1; | |
333 | } else { | |
334 | sr_info("Disabling demux mode."); | |
335 | devc->capture_flags &= ~CAPTURE_FLAG_DEMUX; | |
336 | devc->capture_flags |= CAPTURE_FLAG_NOISE_FILTER; | |
337 | devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1; | |
338 | } | |
339 | ||
340 | /* Calculate actual samplerate used and complain if it is different | |
341 | * from the requested. | |
342 | */ | |
343 | devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1); | |
344 | if (devc->capture_flags & CAPTURE_FLAG_DEMUX) | |
345 | devc->cur_samplerate *= 2; | |
346 | if (devc->cur_samplerate != samplerate) | |
347 | sr_info("Can't match samplerate %" PRIu64 ", using %" PRIu64 | |
348 | ".", | |
349 | samplerate, devc->cur_samplerate); | |
350 | ||
351 | return SR_OK; | |
352 | } | |
353 | ||
354 | SR_PRIV void abort_acquisition(const struct sr_dev_inst *sdi) | |
355 | { | |
356 | struct sr_serial_dev_inst *serial; | |
357 | ||
358 | serial = sdi->conn; | |
359 | ols_send_reset(serial); | |
360 | ||
361 | serial_source_remove(sdi->session, serial); | |
362 | ||
363 | std_session_send_df_end(sdi); | |
364 | } | |
365 | ||
366 | SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data) | |
367 | { | |
368 | struct dev_context *devc; | |
369 | struct sr_dev_inst *sdi; | |
370 | struct sr_serial_dev_inst *serial; | |
371 | struct sr_datafeed_packet packet; | |
372 | struct sr_datafeed_logic logic; | |
373 | uint32_t sample; | |
374 | int num_changroups, offset, j; | |
375 | unsigned int i; | |
376 | unsigned char byte; | |
377 | ||
378 | (void)fd; | |
379 | ||
380 | sdi = cb_data; | |
381 | serial = sdi->conn; | |
382 | devc = sdi->priv; | |
383 | ||
384 | if (devc->num_transfers == 0 && revents == 0) { | |
385 | /* Ignore timeouts as long as we haven't received anything */ | |
386 | return TRUE; | |
387 | } | |
388 | ||
389 | if (devc->num_transfers++ == 0) { | |
390 | devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4); | |
391 | if (!devc->raw_sample_buf) { | |
392 | sr_err("Sample buffer malloc failed."); | |
393 | return FALSE; | |
394 | } | |
395 | /* fill with 1010... for debugging */ | |
396 | memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4); | |
397 | } | |
398 | ||
399 | num_changroups = 0; | |
400 | for (i = 0x20; i > 0x02; i >>= 1) { | |
401 | if ((devc->capture_flags & i) == 0) { | |
402 | num_changroups++; | |
403 | } | |
404 | } | |
405 | ||
406 | if (revents == G_IO_IN && devc->num_samples < devc->limit_samples) { | |
407 | if (serial_read_nonblocking(serial, &byte, 1) != 1) | |
408 | return FALSE; | |
409 | devc->cnt_bytes++; | |
410 | ||
411 | /* Ignore it if we've read enough. */ | |
412 | if (devc->num_samples >= devc->limit_samples) | |
413 | return TRUE; | |
414 | ||
415 | devc->sample[devc->num_bytes++] = byte; | |
416 | sr_spew("Received byte 0x%.2x.", byte); | |
417 | if (devc->num_bytes == num_changroups) { | |
418 | devc->cnt_samples++; | |
419 | devc->cnt_samples_rle++; | |
420 | /* | |
421 | * Got a full sample. Convert from the OLS's little-endian | |
422 | * sample to the local format. | |
423 | */ | |
424 | sample = devc->sample[0] | (devc->sample[1] << 8) | | |
425 | (devc->sample[2] << 16) | | |
426 | (devc->sample[3] << 24); | |
427 | sr_dbg("Received sample 0x%.*x.", devc->num_bytes * 2, | |
428 | sample); | |
429 | if (devc->capture_flags & CAPTURE_FLAG_RLE) { | |
430 | /* | |
431 | * In RLE mode the high bit of the sample is the | |
432 | * "count" flag, meaning this sample is the number | |
433 | * of times the previous sample occurred. | |
434 | */ | |
435 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
436 | /* Clear the high bit. */ | |
437 | sample &= ~(0x80 << (devc->num_bytes - | |
438 | 1) * 8); | |
439 | devc->rle_count = sample; | |
440 | devc->cnt_samples_rle += | |
441 | devc->rle_count; | |
442 | sr_dbg("RLE count: %u.", | |
443 | devc->rle_count); | |
444 | devc->num_bytes = 0; | |
445 | return TRUE; | |
446 | } | |
447 | } | |
448 | devc->num_samples += devc->rle_count + 1; | |
449 | if (devc->num_samples > devc->limit_samples) { | |
450 | /* Save us from overrunning the buffer. */ | |
451 | devc->rle_count -= | |
452 | devc->num_samples - devc->limit_samples; | |
453 | devc->num_samples = devc->limit_samples; | |
454 | } | |
455 | ||
456 | if (num_changroups < 4) { | |
457 | /* | |
458 | * Some channel groups may have been turned | |
459 | * off, to speed up transfer between the | |
460 | * hardware and the PC. Expand that here before | |
461 | * submitting it over the session bus -- | |
462 | * whatever is listening on the bus will be | |
463 | * expecting a full 32-bit sample, based on | |
464 | * the number of channels. | |
465 | */ | |
466 | j = 0; | |
467 | uint8_t tmp_sample[4] = { 0, 0, 0, 0 }; | |
468 | for (i = 0; i < 4; i++) { | |
469 | if (((devc->capture_flags >> 2) & | |
470 | (1 << i)) == 0) { | |
471 | /* | |
472 | * This channel group was | |
473 | * enabled, copy from received | |
474 | * sample. | |
475 | */ | |
476 | tmp_sample[i] = | |
477 | devc->sample[j++]; | |
478 | } | |
479 | } | |
480 | memcpy(devc->sample, tmp_sample, 4); | |
481 | sr_spew("Expanded sample: 0x%.2hhx%.2hhx%.2hhx%.2hhx ", | |
482 | devc->sample[3], devc->sample[2], | |
483 | devc->sample[1], devc->sample[0]); | |
484 | } | |
485 | ||
486 | /* | |
487 | * the OLS sends its sample buffer backwards. | |
488 | * store it in reverse order here, so we can dump | |
489 | * this on the session bus later. | |
490 | */ | |
491 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
492 | for (i = 0; i <= devc->rle_count; i++) { | |
493 | memcpy(devc->raw_sample_buf + offset + (i * 4), | |
494 | devc->sample, 4); | |
495 | } | |
496 | memset(devc->sample, 0, 4); | |
497 | devc->num_bytes = 0; | |
498 | devc->rle_count = 0; | |
499 | } | |
500 | } else { | |
501 | /* | |
502 | * This is the main loop telling us a timeout was reached, or | |
503 | * we've acquired all the samples we asked for -- we're done. | |
504 | * Send the (properly-ordered) buffer to the frontend. | |
505 | */ | |
506 | sr_dbg("Received %d bytes, %d samples, %d decompressed samples.", | |
507 | devc->cnt_bytes, devc->cnt_samples, | |
508 | devc->cnt_samples_rle); | |
509 | if (devc->trigger_at_smpl != OLS_NO_TRIGGER) { | |
510 | /* | |
511 | * A trigger was set up, so we need to tell the frontend | |
512 | * about it. | |
513 | */ | |
514 | if (devc->trigger_at_smpl > 0) { | |
515 | /* There are pre-trigger samples, send those first. */ | |
516 | packet.type = SR_DF_LOGIC; | |
517 | packet.payload = &logic; | |
518 | logic.length = devc->trigger_at_smpl * 4; | |
519 | logic.unitsize = 4; | |
520 | logic.data = devc->raw_sample_buf + | |
521 | (devc->limit_samples - | |
522 | devc->num_samples) * | |
523 | 4; | |
524 | sr_session_send(sdi, &packet); | |
525 | } | |
526 | ||
527 | /* Send the trigger. */ | |
528 | std_session_send_df_trigger(sdi); | |
529 | } | |
530 | ||
531 | /* Send post-trigger / all captured samples. */ | |
532 | int num_pre_trigger_samples = devc->trigger_at_smpl == | |
533 | OLS_NO_TRIGGER ? | |
534 | 0 : | |
535 | devc->trigger_at_smpl; | |
536 | packet.type = SR_DF_LOGIC; | |
537 | packet.payload = &logic; | |
538 | logic.length = | |
539 | (devc->num_samples - num_pre_trigger_samples) * 4; | |
540 | logic.unitsize = 4; | |
541 | logic.data = devc->raw_sample_buf + | |
542 | (num_pre_trigger_samples + devc->limit_samples - | |
543 | devc->num_samples) * | |
544 | 4; | |
545 | sr_session_send(sdi, &packet); | |
546 | ||
547 | g_free(devc->raw_sample_buf); | |
548 | ||
549 | serial_flush(serial); | |
550 | abort_acquisition(sdi); | |
551 | } | |
552 | ||
553 | return TRUE; | |
554 | } | |
555 | ||
556 | static int | |
557 | ols_set_basic_trigger_stage(const struct ols_basic_trigger_desc *trigger_desc, | |
558 | struct sr_serial_dev_inst *serial, int stage) | |
559 | { | |
560 | uint8_t cmd, arg[4]; | |
561 | ||
562 | cmd = CMD_SET_BASIC_TRIGGER_MASK0 + stage * 4; | |
563 | if (ols_send_longdata(serial, cmd, trigger_desc->trigger_mask[stage]) != SR_OK) | |
564 | return SR_ERR; | |
565 | ||
566 | cmd = CMD_SET_BASIC_TRIGGER_VALUE0 + stage * 4; | |
567 | if (ols_send_longdata(serial, cmd, trigger_desc->trigger_value[stage]) != SR_OK) | |
568 | return SR_ERR; | |
569 | ||
570 | cmd = CMD_SET_BASIC_TRIGGER_CONFIG0 + stage * 4; | |
571 | arg[0] = arg[1] = arg[3] = 0x00; | |
572 | arg[2] = stage; | |
573 | if (stage == trigger_desc->num_stages - 1) | |
574 | /* Last stage, fire when this one matches. */ | |
575 | arg[3] |= TRIGGER_START; | |
576 | if (send_longcommand(serial, cmd, arg) != SR_OK) | |
577 | return SR_ERR; | |
578 | ||
579 | return SR_OK; | |
580 | } | |
581 | ||
582 | SR_PRIV int ols_prepare_acquisition(const struct sr_dev_inst *sdi) | |
583 | { | |
584 | int ret; | |
585 | ||
586 | struct dev_context *devc = sdi->priv; | |
587 | struct sr_serial_dev_inst *serial = sdi->conn; | |
588 | ||
589 | int num_changroups = 0; | |
590 | uint8_t changroup_mask = 0; | |
591 | uint32_t channel_mask = ols_channel_mask(sdi); | |
592 | for (unsigned int i = 0; i < 4; i++) { | |
593 | if (channel_mask & (0xff << (i * 8))) { | |
594 | changroup_mask |= (1 << i); | |
595 | num_changroups++; | |
596 | } | |
597 | } | |
598 | ||
599 | /* | |
600 | * Limit readcount to prevent reading past the end of the hardware | |
601 | * buffer. Rather read too many samples than too few. | |
602 | */ | |
603 | uint32_t samplecount = | |
604 | MIN(devc->max_samples / num_changroups, devc->limit_samples); | |
605 | uint32_t readcount = (samplecount + 3) / 4; | |
606 | uint32_t delaycount; | |
607 | ||
608 | /* Basic triggers. */ | |
609 | struct ols_basic_trigger_desc basic_trigger_desc; | |
610 | if (convert_trigger(sdi, &basic_trigger_desc) != SR_OK) { | |
611 | sr_err("Failed to configure channels."); | |
612 | return SR_ERR; | |
613 | } | |
614 | if (basic_trigger_desc.num_stages > 0) { | |
615 | /* | |
616 | * According to http://mygizmos.org/ols/Logic-Sniffer-FPGA-Spec.pdf | |
617 | * reset command must be send prior each arm command | |
618 | */ | |
619 | sr_dbg("Send reset command before trigger configure"); | |
620 | if (ols_send_reset(serial) != SR_OK) | |
621 | return SR_ERR; | |
622 | ||
623 | delaycount = readcount * (1 - devc->capture_ratio / 100.0); | |
624 | devc->trigger_at_smpl = (readcount - delaycount) * 4 - | |
625 | basic_trigger_desc.num_stages; | |
626 | for (int i = 0; i < basic_trigger_desc.num_stages; i++) { | |
627 | sr_dbg("Setting OLS stage %d trigger.", i); | |
628 | if ((ret = ols_set_basic_trigger_stage( | |
629 | &basic_trigger_desc, serial, i)) != SR_OK) | |
630 | return ret; | |
631 | } | |
632 | } else { | |
633 | /* No triggers configured, force trigger on first stage. */ | |
634 | sr_dbg("Forcing trigger at stage 0."); | |
635 | basic_trigger_desc.num_stages = 1; | |
636 | if ((ret = ols_set_basic_trigger_stage(&basic_trigger_desc, | |
637 | serial, 0)) != SR_OK) | |
638 | return ret; | |
639 | delaycount = readcount; | |
640 | } | |
641 | ||
642 | /* Samplerate. */ | |
643 | sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)", | |
644 | devc->cur_samplerate, devc->cur_samplerate_divider); | |
645 | if (ols_send_longdata(serial, CMD_SET_DIVIDER, | |
646 | devc->cur_samplerate_divider & 0x00FFFFFF) != SR_OK) | |
647 | return SR_ERR; | |
648 | ||
649 | /* Send sample limit and pre/post-trigger capture ratio. */ | |
650 | sr_dbg("Setting sample limit %d, trigger point at %d", | |
651 | (readcount - 1) * 4, (delaycount - 1) * 4); | |
652 | ||
653 | if (devc->max_samples > 256 * 1024) { | |
654 | if (ols_send_longdata(serial, CMD_CAPTURE_READCOUNT, | |
655 | readcount - 1) != SR_OK) | |
656 | return SR_ERR; | |
657 | if (ols_send_longdata(serial, CMD_CAPTURE_DELAYCOUNT, | |
658 | delaycount - 1) != SR_OK) | |
659 | return SR_ERR; | |
660 | } else { | |
661 | uint8_t arg[4]; | |
662 | WL16(&arg[0], readcount - 1); | |
663 | WL16(&arg[2], delaycount - 1); | |
664 | if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK) | |
665 | return SR_ERR; | |
666 | } | |
667 | ||
668 | /* Flag register. */ | |
669 | sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s, " | |
670 | "%s clock%s", | |
671 | devc->capture_flags & CAPTURE_FLAG_INTERNAL_TEST_MODE ? "on" : | |
672 | "off", | |
673 | devc->capture_flags & CAPTURE_FLAG_EXTERNAL_TEST_MODE ? "on" : | |
674 | "off", | |
675 | devc->capture_flags & CAPTURE_FLAG_RLE ? "on" : "off", | |
676 | devc->capture_flags & CAPTURE_FLAG_NOISE_FILTER ? "on" : "off", | |
677 | devc->capture_flags & CAPTURE_FLAG_DEMUX ? "on" : "off", | |
678 | devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? "external" : | |
679 | "internal", | |
680 | devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? | |
681 | (devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK ? | |
682 | " on falling edge" : | |
683 | "on rising edge") : | |
684 | ""); | |
685 | ||
686 | /* | |
687 | * Enable/disable OLS channel groups in the flag register according | |
688 | * to the channel mask. 1 means "disable channel". | |
689 | */ | |
690 | devc->capture_flags &= ~0x3c; | |
691 | devc->capture_flags |= ~(changroup_mask << 2) & 0x3c; | |
692 | ||
693 | /* RLE mode is always zero, for now. */ | |
694 | ||
695 | if (ols_send_longdata(serial, CMD_SET_FLAGS, devc->capture_flags) != SR_OK) | |
696 | return SR_ERR; | |
697 | ||
698 | return SR_OK; | |
699 | } |