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