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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 "protocol.h" | |
21 | ||
22 | extern SR_PRIV struct sr_dev_driver p_ols_driver_info; | |
23 | ||
24 | SR_PRIV int write_shortcommand(struct dev_context *devc, uint8_t command) | |
25 | { | |
26 | uint8_t buf[1]; | |
27 | int bytes_written; | |
28 | ||
29 | sr_dbg("Sending cmd 0x%.2x.", command); | |
30 | buf[0] = command; | |
31 | bytes_written = ftdi_write_data(devc->ftdic, buf, 1); | |
32 | if (bytes_written < 0) { | |
33 | sr_err("Failed to write FTDI data (%d): %s.", | |
34 | bytes_written, ftdi_get_error_string(devc->ftdic)); | |
35 | return SR_ERR; | |
36 | } else if (bytes_written != 1) { | |
37 | sr_err("FTDI write error, only %d/%d bytes written: %s.", | |
38 | bytes_written, 1, ftdi_get_error_string(devc->ftdic)); | |
39 | return SR_ERR; | |
40 | } | |
41 | ||
42 | return SR_OK; | |
43 | } | |
44 | ||
45 | SR_PRIV int write_longcommand(struct dev_context *devc, uint8_t command, uint8_t *data) | |
46 | { | |
47 | uint8_t buf[5]; | |
48 | int bytes_written; | |
49 | ||
50 | sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command, | |
51 | data[0], 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 | bytes_written = ftdi_write_data(devc->ftdic, buf, 5); | |
58 | if (bytes_written < 0) { | |
59 | sr_err("Failed to write FTDI data (%d): %s.", | |
60 | bytes_written, ftdi_get_error_string(devc->ftdic)); | |
61 | return SR_ERR; | |
62 | } else if (bytes_written != 5) { | |
63 | sr_err("FTDI write error, only %d/%d bytes written: %s.", | |
64 | bytes_written, 1, ftdi_get_error_string(devc->ftdic)); | |
65 | return SR_ERR; | |
66 | } | |
67 | ||
68 | return SR_OK; | |
69 | } | |
70 | ||
71 | SR_PRIV int p_ols_open(struct dev_context *devc) | |
72 | { | |
73 | int ret; | |
74 | ||
75 | /* Note: Caller checks devc and devc->ftdic. */ | |
76 | ||
77 | /* Select interface B, otherwise communication will fail. */ | |
78 | ret = ftdi_set_interface(devc->ftdic, INTERFACE_B); | |
79 | if (ret < 0) { | |
80 | sr_err("Failed to set FTDI interface B (%d): %s", ret, | |
81 | ftdi_get_error_string(devc->ftdic)); | |
82 | return SR_ERR; | |
83 | } | |
84 | sr_dbg("FTDI chip interface B set successfully."); | |
85 | ||
86 | /* Check for the device and temporarily open it. */ | |
87 | ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID, | |
88 | USB_IPRODUCT, NULL); | |
89 | if (ret < 0) { | |
90 | /* Log errors, except for -3 ("device not found"). */ | |
91 | if (ret != -3) | |
92 | sr_err("Failed to open device (%d): %s", ret, | |
93 | ftdi_get_error_string(devc->ftdic)); | |
94 | return SR_ERR; | |
95 | } | |
96 | sr_dbg("FTDI device opened successfully."); | |
97 | ||
98 | /* Purge RX/TX buffers in the FTDI chip. */ | |
99 | if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) { | |
100 | sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.", | |
101 | ret, ftdi_get_error_string(devc->ftdic)); | |
102 | goto err_open_close_ftdic; | |
103 | } | |
104 | sr_dbg("FTDI chip buffers purged successfully."); | |
105 | ||
106 | /* Reset the FTDI bitmode. */ | |
107 | ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET); | |
108 | if (ret < 0) { | |
109 | sr_err("Failed to reset the FTDI chip bitmode (%d): %s.", | |
110 | ret, ftdi_get_error_string(devc->ftdic)); | |
111 | goto err_open_close_ftdic; | |
112 | } | |
113 | sr_dbg("FTDI chip bitmode reset successfully."); | |
114 | ||
115 | /* Set the FTDI latency timer to 16. */ | |
116 | ret = ftdi_set_latency_timer(devc->ftdic, 16); | |
117 | if (ret < 0) { | |
118 | sr_err("Failed to set FTDI latency timer (%d): %s.", | |
119 | ret, ftdi_get_error_string(devc->ftdic)); | |
120 | goto err_open_close_ftdic; | |
121 | } | |
122 | sr_dbg("FTDI chip latency timer set successfully."); | |
123 | ||
124 | /* Set the FTDI read data chunk size to 64kB. */ | |
125 | ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024); | |
126 | if (ret < 0) { | |
127 | sr_err("Failed to set FTDI read data chunk size (%d): %s.", | |
128 | ret, ftdi_get_error_string(devc->ftdic)); | |
129 | goto err_open_close_ftdic; | |
130 | } | |
131 | sr_dbg("FTDI chip read data chunk size set successfully."); | |
132 | ||
133 | return SR_OK; | |
134 | ||
135 | err_open_close_ftdic: | |
136 | ftdi_usb_close(devc->ftdic); | |
137 | return SR_ERR; | |
138 | } | |
139 | ||
140 | SR_PRIV int p_ols_close(struct dev_context *devc) | |
141 | { | |
142 | int ret; | |
143 | ||
144 | /* Note: Caller checks devc and devc->ftdic. */ | |
145 | ||
146 | if ((ret = ftdi_usb_close(devc->ftdic)) < 0) { | |
147 | sr_err("Failed to close FTDI device (%d): %s.", | |
148 | ret, ftdi_get_error_string(devc->ftdic)); | |
149 | return SR_ERR; | |
150 | } | |
151 | ||
152 | return SR_OK; | |
153 | } | |
154 | ||
155 | /* Configures the channel mask based on which channels are enabled. */ | |
156 | SR_PRIV void pols_channel_mask(const struct sr_dev_inst *sdi) | |
157 | { | |
158 | struct dev_context *devc; | |
159 | struct sr_channel *channel; | |
160 | const GSList *l; | |
161 | ||
162 | devc = sdi->priv; | |
163 | ||
164 | devc->channel_mask = 0; | |
165 | for (l = sdi->channels; l; l = l->next) { | |
166 | channel = l->data; | |
167 | if (channel->enabled) | |
168 | devc->channel_mask |= 1 << channel->index; | |
169 | } | |
170 | } | |
171 | ||
172 | SR_PRIV int pols_convert_trigger(const struct sr_dev_inst *sdi) | |
173 | { | |
174 | struct dev_context *devc; | |
175 | struct sr_trigger *trigger; | |
176 | struct sr_trigger_stage *stage; | |
177 | struct sr_trigger_match *match; | |
178 | const GSList *l, *m; | |
179 | int i; | |
180 | ||
181 | devc = sdi->priv; | |
182 | ||
183 | devc->num_stages = 0; | |
184 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { | |
185 | devc->trigger_mask[i] = 0; | |
186 | devc->trigger_value[i] = 0; | |
187 | devc->trigger_edge[i] = 0; | |
188 | } | |
189 | ||
190 | if (!(trigger = sr_session_trigger_get(sdi->session))) | |
191 | return SR_OK; | |
192 | ||
193 | devc->num_stages = g_slist_length(trigger->stages); | |
194 | if (devc->num_stages > NUM_TRIGGER_STAGES) { | |
195 | sr_err("This device only supports %d trigger stages.", | |
196 | NUM_TRIGGER_STAGES); | |
197 | return SR_ERR; | |
198 | } | |
199 | ||
200 | for (l = trigger->stages; l; l = l->next) { | |
201 | stage = l->data; | |
202 | for (m = stage->matches; m; m = m->next) { | |
203 | match = m->data; | |
204 | if (!match->channel->enabled) | |
205 | /* Ignore disabled channels with a trigger. */ | |
206 | continue; | |
207 | devc->trigger_mask[stage->stage] |= 1 << match->channel->index; | |
208 | if (match->match == SR_TRIGGER_ONE || match->match == SR_TRIGGER_RISING) | |
209 | devc->trigger_value[stage->stage] |= 1 << match->channel->index; | |
210 | if (match->match == SR_TRIGGER_RISING || match->match == SR_TRIGGER_FALLING) | |
211 | devc->trigger_edge[stage->stage] |= 1 << match->channel->index; | |
212 | } | |
213 | } | |
214 | ||
215 | return SR_OK; | |
216 | } | |
217 | ||
218 | SR_PRIV struct sr_dev_inst *p_ols_get_metadata(uint8_t *buf, int bytes_read, struct dev_context *devc) | |
219 | { | |
220 | struct sr_dev_inst *sdi; | |
221 | uint32_t tmp_int, ui; | |
222 | uint8_t key, type, token; | |
223 | GString *tmp_str, *devname, *version; | |
224 | guchar tmp_c; | |
225 | int index, i; | |
226 | ||
227 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
228 | sdi->status = SR_ST_INACTIVE; | |
229 | sdi->driver = &p_ols_driver_info; | |
230 | sdi->priv = devc; | |
231 | ||
232 | devname = g_string_new(""); | |
233 | version = g_string_new(""); | |
234 | ||
235 | index = 0; | |
236 | while (index < bytes_read) { | |
237 | key = buf[index++]; | |
238 | if (key == 0x00) { | |
239 | sr_dbg("Got metadata key 0x00, metadata ends."); | |
240 | break; | |
241 | } | |
242 | type = key >> 5; | |
243 | token = key & 0x1f; | |
244 | switch (type) { | |
245 | case 0: | |
246 | /* NULL-terminated string */ | |
247 | tmp_str = g_string_new(""); | |
248 | while ((index < bytes_read) && ((tmp_c = buf[index++]) != '\0')) | |
249 | g_string_append_c(tmp_str, tmp_c); | |
250 | sr_dbg("Got metadata key 0x%.2x value '%s'.", | |
251 | key, tmp_str->str); | |
252 | switch (token) { | |
253 | case 0x01: | |
254 | /* Device name */ | |
255 | devname = g_string_append(devname, tmp_str->str); | |
256 | break; | |
257 | case 0x02: | |
258 | /* FPGA firmware version */ | |
259 | if (version->len) | |
260 | g_string_append(version, ", "); | |
261 | g_string_append(version, "FPGA version "); | |
262 | g_string_append(version, tmp_str->str); | |
263 | break; | |
264 | case 0x03: | |
265 | /* Ancillary version */ | |
266 | if (version->len) | |
267 | g_string_append(version, ", "); | |
268 | g_string_append(version, "Ancillary version "); | |
269 | g_string_append(version, tmp_str->str); | |
270 | break; | |
271 | default: | |
272 | sr_info("Unknown token 0x%.2x: '%s'", | |
273 | token, tmp_str->str); | |
274 | break; | |
275 | } | |
276 | g_string_free(tmp_str, TRUE); | |
277 | break; | |
278 | case 1: | |
279 | /* 32-bit unsigned integer */ | |
280 | tmp_int = 0; | |
281 | for (i = 0; i < 4; i++) { | |
282 | tmp_int = (tmp_int << 8) | buf[index++]; | |
283 | } | |
284 | sr_dbg("Got metadata key 0x%.2x value 0x%.8x.", | |
285 | key, tmp_int); | |
286 | switch (token) { | |
287 | case 0x00: | |
288 | /* Number of usable channels */ | |
289 | for (ui = 0; ui < tmp_int; ui++) | |
290 | sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE, | |
291 | p_ols_channel_names[ui]); | |
292 | break; | |
293 | case 0x01: | |
294 | /* Amount of sample memory available (bytes) */ | |
295 | devc->max_samplebytes = tmp_int; | |
296 | break; | |
297 | case 0x02: | |
298 | /* Amount of dynamic memory available (bytes) */ | |
299 | /* what is this for? */ | |
300 | break; | |
301 | case 0x03: | |
302 | /* Maximum sample rate (hz) */ | |
303 | devc->max_samplerate = tmp_int; | |
304 | break; | |
305 | case 0x04: | |
306 | /* protocol version */ | |
307 | devc->protocol_version = tmp_int; | |
308 | break; | |
309 | default: | |
310 | sr_info("Unknown token 0x%.2x: 0x%.8x.", | |
311 | token, tmp_int); | |
312 | break; | |
313 | } | |
314 | break; | |
315 | case 2: | |
316 | /* 8-bit unsigned integer */ | |
317 | tmp_c = buf[index++]; | |
318 | sr_dbg("Got metadata key 0x%.2x value 0x%.2x.", | |
319 | key, tmp_c); | |
320 | switch (token) { | |
321 | case 0x00: | |
322 | /* Number of usable channels */ | |
323 | for (ui = 0; ui < tmp_c; ui++) | |
324 | sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE, | |
325 | p_ols_channel_names[ui]); | |
326 | break; | |
327 | case 0x01: | |
328 | /* protocol version */ | |
329 | devc->protocol_version = tmp_c; | |
330 | break; | |
331 | default: | |
332 | sr_info("Unknown token 0x%.2x: 0x%.2x.", | |
333 | token, tmp_c); | |
334 | break; | |
335 | } | |
336 | break; | |
337 | default: | |
338 | /* unknown type */ | |
339 | break; | |
340 | } | |
341 | } | |
342 | ||
343 | sdi->model = devname->str; | |
344 | sdi->version = version->str; | |
345 | g_string_free(devname, FALSE); | |
346 | g_string_free(version, FALSE); | |
347 | ||
348 | return sdi; | |
349 | } | |
350 | ||
351 | SR_PRIV int p_ols_set_samplerate(const struct sr_dev_inst *sdi, | |
352 | const uint64_t samplerate) | |
353 | { | |
354 | struct dev_context *devc; | |
355 | ||
356 | devc = sdi->priv; | |
357 | if (devc->max_samplerate && samplerate > devc->max_samplerate) | |
358 | return SR_ERR_SAMPLERATE; | |
359 | ||
360 | if (samplerate > CLOCK_RATE) { | |
361 | sr_info("Enabling demux mode."); | |
362 | devc->flag_reg |= FLAG_DEMUX; | |
363 | devc->flag_reg &= ~FLAG_FILTER; | |
364 | devc->max_channels = NUM_CHANNELS / 2; | |
365 | devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1; | |
366 | } else { | |
367 | sr_info("Disabling demux mode."); | |
368 | devc->flag_reg &= ~FLAG_DEMUX; | |
369 | devc->flag_reg |= FLAG_FILTER; | |
370 | devc->max_channels = NUM_CHANNELS; | |
371 | devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1; | |
372 | } | |
373 | ||
374 | /* Calculate actual samplerate used and complain if it is different | |
375 | * from the requested. | |
376 | */ | |
377 | devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1); | |
378 | if (devc->flag_reg & FLAG_DEMUX) | |
379 | devc->cur_samplerate *= 2; | |
380 | if (devc->cur_samplerate != samplerate) | |
381 | sr_info("Can't match samplerate %" PRIu64 ", using %" | |
382 | PRIu64 ".", samplerate, devc->cur_samplerate); | |
383 | ||
384 | return SR_OK; | |
385 | } | |
386 | ||
387 | ||
388 | SR_PRIV int p_ols_receive_data(int fd, int revents, void *cb_data) | |
389 | { | |
390 | struct dev_context *devc; | |
391 | struct sr_dev_inst *sdi; | |
392 | struct sr_datafeed_packet packet; | |
393 | struct sr_datafeed_logic logic; | |
394 | uint32_t sample; | |
395 | int num_channels, offset, j; | |
396 | int bytes_read, index; | |
397 | unsigned int i; | |
398 | unsigned char byte; | |
399 | ||
400 | (void)fd; | |
401 | (void)revents; | |
402 | ||
403 | sdi = cb_data; | |
404 | devc = sdi->priv; | |
405 | ||
406 | if (devc->num_transfers++ == 0) { | |
407 | devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4); | |
408 | if (!devc->raw_sample_buf) { | |
409 | sr_err("Sample buffer malloc failed."); | |
410 | return FALSE; | |
411 | } | |
412 | /* fill with 1010... for debugging */ | |
413 | memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4); | |
414 | } | |
415 | ||
416 | if ((devc->num_samples < devc->limit_samples) && (devc->cnt_samples < devc->max_samples)) { | |
417 | ||
418 | num_channels = 0; | |
419 | for (i = NUM_CHANNELS; i > 0x02; i /= 2) { | |
420 | if ((devc->flag_reg & i) == 0) { | |
421 | num_channels++; | |
422 | } | |
423 | } | |
424 | ||
425 | /* Get a block of data. */ | |
426 | bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE); | |
427 | if (bytes_read < 0) { | |
428 | sr_err("Failed to read FTDI data (%d): %s.", | |
429 | bytes_read, ftdi_get_error_string(devc->ftdic)); | |
430 | sdi->driver->dev_acquisition_stop(sdi, sdi); | |
431 | return FALSE; | |
432 | } | |
433 | if (bytes_read == 0) { | |
434 | sr_spew("Received 0 bytes, nothing to do."); | |
435 | return TRUE; | |
436 | } | |
437 | ||
438 | sr_dbg("Received %d bytes", bytes_read); | |
439 | ||
440 | index = 0; | |
441 | while (index < bytes_read) { | |
442 | byte = devc->ftdi_buf[index++]; | |
443 | devc->cnt_bytes++; | |
444 | ||
445 | devc->sample[devc->num_bytes++] = byte; | |
446 | sr_spew("Received byte 0x%.2x.", byte); | |
447 | ||
448 | if ((devc->flag_reg & FLAG_DEMUX) && (devc->flag_reg & FLAG_RLE)) { | |
449 | /* RLE in demux mode must be processed differently | |
450 | * since in this case the RLE encoder is operating on pairs of samples. | |
451 | */ | |
452 | if (devc->num_bytes == num_channels * 2) { | |
453 | devc->cnt_samples += 2; | |
454 | devc->cnt_samples_rle += 2; | |
455 | /* | |
456 | * Got a sample pair. Convert from the OLS's little-endian | |
457 | * sample to the local format. | |
458 | */ | |
459 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
460 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
461 | sr_spew("Received sample pair 0x%.*x.", devc->num_bytes * 2, sample); | |
462 | ||
463 | /* | |
464 | * In RLE mode the high bit of the sample pair is the | |
465 | * "count" flag, meaning this sample pair is the number | |
466 | * of times the previous sample pair occurred. | |
467 | */ | |
468 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
469 | /* Clear the high bit. */ | |
470 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
471 | devc->rle_count = sample; | |
472 | devc->cnt_samples_rle += devc->rle_count * 2; | |
473 | sr_dbg("RLE count: %u.", devc->rle_count * 2); | |
474 | devc->num_bytes = 0; | |
475 | continue; | |
476 | } | |
477 | devc->num_samples += (devc->rle_count + 1) * 2; | |
478 | if (devc->num_samples > devc->limit_samples) { | |
479 | /* Save us from overrunning the buffer. */ | |
480 | devc->rle_count -= (devc->num_samples - devc->limit_samples) / 2; | |
481 | devc->num_samples = devc->limit_samples; | |
482 | index = bytes_read; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Some channel groups may have been turned | |
487 | * off, to speed up transfer between the | |
488 | * hardware and the PC. Expand that here before | |
489 | * submitting it over the session bus -- | |
490 | * whatever is listening on the bus will be | |
491 | * expecting a full 32-bit sample, based on | |
492 | * the number of channels. | |
493 | */ | |
494 | j = 0; | |
495 | /* expand first sample */ | |
496 | memset(devc->tmp_sample, 0, 4); | |
497 | for (i = 0; i < 2; i++) { | |
498 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
499 | /* | |
500 | * This channel group was | |
501 | * enabled, copy from received | |
502 | * sample. | |
503 | */ | |
504 | devc->tmp_sample[i] = devc->sample[j++]; | |
505 | } | |
506 | } | |
507 | /* Clear out the most significant bit of the sample */ | |
508 | devc->tmp_sample[devc->num_bytes - 1] &= 0x7f; | |
509 | sr_spew("Expanded sample 1: 0x%.8x.", devc->tmp_sample); | |
510 | ||
511 | /* expand second sample */ | |
512 | memset(devc->tmp_sample2, 0, 4); | |
513 | for (i = 0; i < 2; i++) { | |
514 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
515 | /* | |
516 | * This channel group was | |
517 | * enabled, copy from received | |
518 | * sample. | |
519 | */ | |
520 | devc->tmp_sample2[i] = devc->sample[j++]; | |
521 | } | |
522 | } | |
523 | /* Clear out the most significant bit of the sample */ | |
524 | devc->tmp_sample2[devc->num_bytes - 1] &= 0x7f; | |
525 | sr_spew("Expanded sample 2: 0x%.8x.", devc->tmp_sample2); | |
526 | ||
527 | /* | |
528 | * OLS sends its sample buffer backwards. | |
529 | * store it in reverse order here, so we can dump | |
530 | * this on the session bus later. | |
531 | */ | |
532 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
533 | for (i = 0; i <= devc->rle_count; i++) { | |
534 | memcpy(devc->raw_sample_buf + offset + (i * 8), | |
535 | devc->tmp_sample2, 4); | |
536 | memcpy(devc->raw_sample_buf + offset + (4 + (i * 8)), | |
537 | devc->tmp_sample, 4); | |
538 | } | |
539 | memset(devc->sample, 0, 4); | |
540 | devc->num_bytes = 0; | |
541 | devc->rle_count = 0; | |
542 | } | |
543 | } | |
544 | else { | |
545 | if (devc->num_bytes == num_channels) { | |
546 | devc->cnt_samples++; | |
547 | devc->cnt_samples_rle++; | |
548 | /* | |
549 | * Got a full sample. Convert from the OLS's little-endian | |
550 | * sample to the local format. | |
551 | */ | |
552 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
553 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
554 | sr_spew("Received sample 0x%.*x.", devc->num_bytes * 2, sample); | |
555 | if (devc->flag_reg & FLAG_RLE) { | |
556 | /* | |
557 | * In RLE mode the high bit of the sample is the | |
558 | * "count" flag, meaning this sample is the number | |
559 | * of times the previous sample occurred. | |
560 | */ | |
561 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
562 | /* Clear the high bit. */ | |
563 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
564 | devc->rle_count = sample; | |
565 | devc->cnt_samples_rle += devc->rle_count; | |
566 | sr_dbg("RLE count: %u.", devc->rle_count); | |
567 | devc->num_bytes = 0; | |
568 | continue; | |
569 | } | |
570 | } | |
571 | devc->num_samples += devc->rle_count + 1; | |
572 | if (devc->num_samples > devc->limit_samples) { | |
573 | /* Save us from overrunning the buffer. */ | |
574 | devc->rle_count -= devc->num_samples - devc->limit_samples; | |
575 | devc->num_samples = devc->limit_samples; | |
576 | index = bytes_read; | |
577 | } | |
578 | ||
579 | if (num_channels < 4) { | |
580 | /* | |
581 | * Some channel groups may have been turned | |
582 | * off, to speed up transfer between the | |
583 | * hardware and the PC. Expand that here before | |
584 | * submitting it over the session bus -- | |
585 | * whatever is listening on the bus will be | |
586 | * expecting a full 32-bit sample, based on | |
587 | * the number of channels. | |
588 | */ | |
589 | j = 0; | |
590 | memset(devc->tmp_sample, 0, 4); | |
591 | for (i = 0; i < 4; i++) { | |
592 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
593 | /* | |
594 | * This channel group was | |
595 | * enabled, copy from received | |
596 | * sample. | |
597 | */ | |
598 | devc->tmp_sample[i] = devc->sample[j++]; | |
599 | } | |
600 | } | |
601 | memcpy(devc->sample, devc->tmp_sample, 4); | |
602 | sr_spew("Expanded sample: 0x%.8x.", sample); | |
603 | } | |
604 | ||
605 | /* | |
606 | * Pipistrello OLS sends its sample buffer backwards. | |
607 | * store it in reverse order here, so we can dump | |
608 | * this on the session bus later. | |
609 | */ | |
610 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
611 | for (i = 0; i <= devc->rle_count; i++) { | |
612 | memcpy(devc->raw_sample_buf + offset + (i * 4), | |
613 | devc->sample, 4); | |
614 | } | |
615 | memset(devc->sample, 0, 4); | |
616 | devc->num_bytes = 0; | |
617 | devc->rle_count = 0; | |
618 | } | |
619 | } | |
620 | } | |
621 | return TRUE; | |
622 | } else { | |
623 | do bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE); | |
624 | while (bytes_read > 0); | |
625 | ||
626 | /* | |
627 | * We've acquired all the samples we asked for -- we're done. | |
628 | * Send the (properly-ordered) buffer to the frontend. | |
629 | */ | |
630 | sr_dbg("Received %d bytes, %d samples, %d decompressed samples.", | |
631 | devc->cnt_bytes, devc->cnt_samples, | |
632 | devc->cnt_samples_rle); | |
633 | if (devc->trigger_at != -1) { | |
634 | /* | |
635 | * A trigger was set up, so we need to tell the frontend | |
636 | * about it. | |
637 | */ | |
638 | if (devc->trigger_at > 0) { | |
639 | /* There are pre-trigger samples, send those first. */ | |
640 | packet.type = SR_DF_LOGIC; | |
641 | packet.payload = &logic; | |
642 | logic.length = devc->trigger_at * 4; | |
643 | logic.unitsize = 4; | |
644 | logic.data = devc->raw_sample_buf + | |
645 | (devc->limit_samples - devc->num_samples) * 4; | |
646 | sr_session_send(cb_data, &packet); | |
647 | } | |
648 | ||
649 | /* Send the trigger. */ | |
650 | packet.type = SR_DF_TRIGGER; | |
651 | sr_session_send(cb_data, &packet); | |
652 | ||
653 | /* Send post-trigger samples. */ | |
654 | packet.type = SR_DF_LOGIC; | |
655 | packet.payload = &logic; | |
656 | logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4); | |
657 | logic.unitsize = 4; | |
658 | logic.data = devc->raw_sample_buf + devc->trigger_at * 4 + | |
659 | (devc->limit_samples - devc->num_samples) * 4; | |
660 | sr_session_send(cb_data, &packet); | |
661 | } else { | |
662 | /* no trigger was used */ | |
663 | packet.type = SR_DF_LOGIC; | |
664 | packet.payload = &logic; | |
665 | logic.length = devc->num_samples * 4; | |
666 | logic.unitsize = 4; | |
667 | logic.data = devc->raw_sample_buf + | |
668 | (devc->limit_samples - devc->num_samples) * 4; | |
669 | sr_session_send(cb_data, &packet); | |
670 | } | |
671 | g_free(devc->raw_sample_buf); | |
672 | ||
673 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
674 | } | |
675 | ||
676 | return TRUE; | |
677 | } |