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4bd80e12 | 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 | ||
6ec6c43b | 20 | #include <config.h> |
4bd80e12 | 21 | #include "protocol.h" |
22 | ||
4bd80e12 | 23 | SR_PRIV int write_shortcommand(struct dev_context *devc, uint8_t command) |
24 | { | |
25 | uint8_t buf[1]; | |
26 | int bytes_written; | |
27 | ||
28 | sr_dbg("Sending cmd 0x%.2x.", command); | |
29 | buf[0] = command; | |
30 | bytes_written = ftdi_write_data(devc->ftdic, buf, 1); | |
31 | if (bytes_written < 0) { | |
32 | sr_err("Failed to write FTDI data (%d): %s.", | |
33 | bytes_written, ftdi_get_error_string(devc->ftdic)); | |
34 | return SR_ERR; | |
35 | } else if (bytes_written != 1) { | |
36 | sr_err("FTDI write error, only %d/%d bytes written: %s.", | |
37 | bytes_written, 1, ftdi_get_error_string(devc->ftdic)); | |
38 | return SR_ERR; | |
39 | } | |
40 | ||
41 | return SR_OK; | |
42 | } | |
43 | ||
44 | SR_PRIV int write_longcommand(struct dev_context *devc, uint8_t command, uint8_t *data) | |
45 | { | |
46 | uint8_t buf[5]; | |
47 | int bytes_written; | |
48 | ||
49 | sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command, | |
50 | data[0], data[1], data[2], data[3]); | |
51 | buf[0] = command; | |
52 | buf[1] = data[0]; | |
53 | buf[2] = data[1]; | |
54 | buf[3] = data[2]; | |
55 | buf[4] = data[3]; | |
56 | bytes_written = ftdi_write_data(devc->ftdic, buf, 5); | |
57 | if (bytes_written < 0) { | |
58 | sr_err("Failed to write FTDI data (%d): %s.", | |
59 | bytes_written, ftdi_get_error_string(devc->ftdic)); | |
60 | return SR_ERR; | |
61 | } else if (bytes_written != 5) { | |
62 | sr_err("FTDI write error, only %d/%d bytes written: %s.", | |
63 | bytes_written, 1, ftdi_get_error_string(devc->ftdic)); | |
64 | return SR_ERR; | |
65 | } | |
66 | ||
67 | return SR_OK; | |
68 | } | |
69 | ||
70 | SR_PRIV int p_ols_open(struct dev_context *devc) | |
71 | { | |
72 | int ret; | |
73 | ||
74 | /* Note: Caller checks devc and devc->ftdic. */ | |
75 | ||
76 | /* Select interface B, otherwise communication will fail. */ | |
77 | ret = ftdi_set_interface(devc->ftdic, INTERFACE_B); | |
78 | if (ret < 0) { | |
79 | sr_err("Failed to set FTDI interface B (%d): %s", ret, | |
80 | ftdi_get_error_string(devc->ftdic)); | |
81 | return SR_ERR; | |
82 | } | |
4bd80e12 | 83 | |
84 | /* Check for the device and temporarily open it. */ | |
85 | ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID, | |
86 | USB_IPRODUCT, NULL); | |
87 | if (ret < 0) { | |
88 | /* Log errors, except for -3 ("device not found"). */ | |
89 | if (ret != -3) | |
90 | sr_err("Failed to open device (%d): %s", ret, | |
91 | ftdi_get_error_string(devc->ftdic)); | |
92 | return SR_ERR; | |
93 | } | |
4bd80e12 | 94 | |
95 | /* Purge RX/TX buffers in the FTDI chip. */ | |
96 | if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) { | |
97 | sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.", | |
98 | ret, ftdi_get_error_string(devc->ftdic)); | |
99 | goto err_open_close_ftdic; | |
100 | } | |
4bd80e12 | 101 | |
102 | /* Reset the FTDI bitmode. */ | |
103 | ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET); | |
104 | if (ret < 0) { | |
105 | sr_err("Failed to reset the FTDI chip bitmode (%d): %s.", | |
106 | ret, ftdi_get_error_string(devc->ftdic)); | |
107 | goto err_open_close_ftdic; | |
108 | } | |
4bd80e12 | 109 | |
110 | /* Set the FTDI latency timer to 16. */ | |
111 | ret = ftdi_set_latency_timer(devc->ftdic, 16); | |
112 | if (ret < 0) { | |
113 | sr_err("Failed to set FTDI latency timer (%d): %s.", | |
114 | ret, ftdi_get_error_string(devc->ftdic)); | |
115 | goto err_open_close_ftdic; | |
116 | } | |
4bd80e12 | 117 | |
118 | /* Set the FTDI read data chunk size to 64kB. */ | |
119 | ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024); | |
120 | if (ret < 0) { | |
121 | sr_err("Failed to set FTDI read data chunk size (%d): %s.", | |
122 | ret, ftdi_get_error_string(devc->ftdic)); | |
123 | goto err_open_close_ftdic; | |
124 | } | |
176d785d | 125 | |
4bd80e12 | 126 | return SR_OK; |
127 | ||
128 | err_open_close_ftdic: | |
1f9bcd0f | 129 | ftdi_usb_close(devc->ftdic); |
7e463623 | 130 | |
4bd80e12 | 131 | return SR_ERR; |
132 | } | |
133 | ||
134 | SR_PRIV int p_ols_close(struct dev_context *devc) | |
135 | { | |
136 | int ret; | |
137 | ||
138 | /* Note: Caller checks devc and devc->ftdic. */ | |
139 | ||
140 | if ((ret = ftdi_usb_close(devc->ftdic)) < 0) { | |
141 | sr_err("Failed to close FTDI device (%d): %s.", | |
142 | ret, ftdi_get_error_string(devc->ftdic)); | |
143 | return SR_ERR; | |
144 | } | |
145 | ||
146 | return SR_OK; | |
147 | } | |
148 | ||
acc885c7 BV |
149 | /* Configures the channel mask based on which channels are enabled. */ |
150 | SR_PRIV void pols_channel_mask(const struct sr_dev_inst *sdi) | |
4bd80e12 | 151 | { |
152 | struct dev_context *devc; | |
acc885c7 | 153 | struct sr_channel *channel; |
4bd80e12 | 154 | const GSList *l; |
4bd80e12 | 155 | |
156 | devc = sdi->priv; | |
157 | ||
158 | devc->channel_mask = 0; | |
acc885c7 BV |
159 | for (l = sdi->channels; l; l = l->next) { |
160 | channel = l->data; | |
161 | if (channel->enabled) | |
162 | devc->channel_mask |= 1 << channel->index; | |
163 | } | |
164 | } | |
165 | ||
166 | SR_PRIV int pols_convert_trigger(const struct sr_dev_inst *sdi) | |
167 | { | |
168 | struct dev_context *devc; | |
169 | struct sr_trigger *trigger; | |
170 | struct sr_trigger_stage *stage; | |
171 | struct sr_trigger_match *match; | |
172 | const GSList *l, *m; | |
173 | int i; | |
174 | ||
175 | devc = sdi->priv; | |
176 | ||
177 | devc->num_stages = 0; | |
4bd80e12 | 178 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { |
179 | devc->trigger_mask[i] = 0; | |
180 | devc->trigger_value[i] = 0; | |
1e0de846 | 181 | devc->trigger_edge[i] = 0; |
4bd80e12 | 182 | } |
183 | ||
acc885c7 BV |
184 | if (!(trigger = sr_session_trigger_get(sdi->session))) |
185 | return SR_OK; | |
4bd80e12 | 186 | |
acc885c7 BV |
187 | devc->num_stages = g_slist_length(trigger->stages); |
188 | if (devc->num_stages > NUM_TRIGGER_STAGES) { | |
189 | sr_err("This device only supports %d trigger stages.", | |
190 | NUM_TRIGGER_STAGES); | |
191 | return SR_ERR; | |
192 | } | |
4bd80e12 | 193 | |
acc885c7 BV |
194 | for (l = trigger->stages; l; l = l->next) { |
195 | stage = l->data; | |
196 | for (m = stage->matches; m; m = m->next) { | |
197 | match = m->data; | |
198 | if (!match->channel->enabled) | |
199 | /* Ignore disabled channels with a trigger. */ | |
200 | continue; | |
201 | devc->trigger_mask[stage->stage] |= 1 << match->channel->index; | |
202 | if (match->match == SR_TRIGGER_ONE || match->match == SR_TRIGGER_RISING) | |
203 | devc->trigger_value[stage->stage] |= 1 << match->channel->index; | |
204 | if (match->match == SR_TRIGGER_RISING || match->match == SR_TRIGGER_FALLING) | |
205 | devc->trigger_edge[stage->stage] |= 1 << match->channel->index; | |
4bd80e12 | 206 | } |
4bd80e12 | 207 | } |
208 | ||
209 | return SR_OK; | |
210 | } | |
211 | ||
212 | SR_PRIV struct sr_dev_inst *p_ols_get_metadata(uint8_t *buf, int bytes_read, struct dev_context *devc) | |
213 | { | |
214 | struct sr_dev_inst *sdi; | |
4bd80e12 | 215 | uint32_t tmp_int, ui; |
216 | uint8_t key, type, token; | |
217 | GString *tmp_str, *devname, *version; | |
218 | guchar tmp_c; | |
219 | int index, i; | |
220 | ||
aac29cc1 | 221 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); |
0af636be | 222 | sdi->status = SR_ST_INACTIVE; |
4bd80e12 | 223 | sdi->priv = devc; |
224 | ||
225 | devname = g_string_new(""); | |
226 | version = g_string_new(""); | |
227 | ||
228 | index = 0; | |
229 | while (index < bytes_read) { | |
230 | key = buf[index++]; | |
231 | if (key == 0x00) { | |
232 | sr_dbg("Got metadata key 0x00, metadata ends."); | |
233 | break; | |
234 | } | |
235 | type = key >> 5; | |
236 | token = key & 0x1f; | |
237 | switch (type) { | |
238 | case 0: | |
239 | /* NULL-terminated string */ | |
240 | tmp_str = g_string_new(""); | |
241 | while ((index < bytes_read) && ((tmp_c = buf[index++]) != '\0')) | |
242 | g_string_append_c(tmp_str, tmp_c); | |
243 | sr_dbg("Got metadata key 0x%.2x value '%s'.", | |
244 | key, tmp_str->str); | |
245 | switch (token) { | |
246 | case 0x01: | |
247 | /* Device name */ | |
248 | devname = g_string_append(devname, tmp_str->str); | |
249 | break; | |
250 | case 0x02: | |
251 | /* FPGA firmware version */ | |
252 | if (version->len) | |
253 | g_string_append(version, ", "); | |
254 | g_string_append(version, "FPGA version "); | |
255 | g_string_append(version, tmp_str->str); | |
256 | break; | |
257 | case 0x03: | |
258 | /* Ancillary version */ | |
259 | if (version->len) | |
260 | g_string_append(version, ", "); | |
261 | g_string_append(version, "Ancillary version "); | |
262 | g_string_append(version, tmp_str->str); | |
263 | break; | |
264 | default: | |
265 | sr_info("Unknown token 0x%.2x: '%s'", | |
266 | token, tmp_str->str); | |
267 | break; | |
268 | } | |
269 | g_string_free(tmp_str, TRUE); | |
270 | break; | |
271 | case 1: | |
272 | /* 32-bit unsigned integer */ | |
273 | tmp_int = 0; | |
274 | for (i = 0; i < 4; i++) { | |
275 | tmp_int = (tmp_int << 8) | buf[index++]; | |
276 | } | |
277 | sr_dbg("Got metadata key 0x%.2x value 0x%.8x.", | |
278 | key, tmp_int); | |
279 | switch (token) { | |
280 | case 0x00: | |
281 | /* Number of usable channels */ | |
5e23fcab ML |
282 | for (ui = 0; ui < tmp_int; ui++) |
283 | sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE, | |
c368e6f3 | 284 | p_ols_channel_names[ui]); |
4bd80e12 | 285 | break; |
286 | case 0x01: | |
287 | /* Amount of sample memory available (bytes) */ | |
b94cff40 | 288 | devc->max_samplebytes = tmp_int; |
4bd80e12 | 289 | break; |
290 | case 0x02: | |
291 | /* Amount of dynamic memory available (bytes) */ | |
292 | /* what is this for? */ | |
293 | break; | |
294 | case 0x03: | |
f3f19d11 | 295 | /* Maximum sample rate (Hz) */ |
4bd80e12 | 296 | devc->max_samplerate = tmp_int; |
297 | break; | |
298 | case 0x04: | |
299 | /* protocol version */ | |
300 | devc->protocol_version = tmp_int; | |
301 | break; | |
302 | default: | |
303 | sr_info("Unknown token 0x%.2x: 0x%.8x.", | |
304 | token, tmp_int); | |
305 | break; | |
306 | } | |
307 | break; | |
308 | case 2: | |
309 | /* 8-bit unsigned integer */ | |
310 | tmp_c = buf[index++]; | |
311 | sr_dbg("Got metadata key 0x%.2x value 0x%.2x.", | |
312 | key, tmp_c); | |
313 | switch (token) { | |
314 | case 0x00: | |
315 | /* Number of usable channels */ | |
5e23fcab ML |
316 | for (ui = 0; ui < tmp_c; ui++) |
317 | sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE, | |
c368e6f3 | 318 | p_ols_channel_names[ui]); |
4bd80e12 | 319 | break; |
320 | case 0x01: | |
321 | /* protocol version */ | |
322 | devc->protocol_version = tmp_c; | |
323 | break; | |
324 | default: | |
325 | sr_info("Unknown token 0x%.2x: 0x%.2x.", | |
326 | token, tmp_c); | |
327 | break; | |
328 | } | |
329 | break; | |
330 | default: | |
331 | /* unknown type */ | |
332 | break; | |
333 | } | |
334 | } | |
335 | ||
336 | sdi->model = devname->str; | |
337 | sdi->version = version->str; | |
338 | g_string_free(devname, FALSE); | |
339 | g_string_free(version, FALSE); | |
340 | ||
341 | return sdi; | |
342 | } | |
343 | ||
344 | SR_PRIV int p_ols_set_samplerate(const struct sr_dev_inst *sdi, | |
345 | const uint64_t samplerate) | |
346 | { | |
347 | struct dev_context *devc; | |
348 | ||
349 | devc = sdi->priv; | |
350 | if (devc->max_samplerate && samplerate > devc->max_samplerate) | |
351 | return SR_ERR_SAMPLERATE; | |
352 | ||
353 | if (samplerate > CLOCK_RATE) { | |
354 | sr_info("Enabling demux mode."); | |
355 | devc->flag_reg |= FLAG_DEMUX; | |
356 | devc->flag_reg &= ~FLAG_FILTER; | |
357 | devc->max_channels = NUM_CHANNELS / 2; | |
358 | devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1; | |
359 | } else { | |
360 | sr_info("Disabling demux mode."); | |
361 | devc->flag_reg &= ~FLAG_DEMUX; | |
362 | devc->flag_reg |= FLAG_FILTER; | |
363 | devc->max_channels = NUM_CHANNELS; | |
364 | devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1; | |
365 | } | |
366 | ||
367 | /* Calculate actual samplerate used and complain if it is different | |
368 | * from the requested. | |
369 | */ | |
370 | devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1); | |
371 | if (devc->flag_reg & FLAG_DEMUX) | |
372 | devc->cur_samplerate *= 2; | |
373 | if (devc->cur_samplerate != samplerate) | |
374 | sr_info("Can't match samplerate %" PRIu64 ", using %" | |
375 | PRIu64 ".", samplerate, devc->cur_samplerate); | |
376 | ||
377 | return SR_OK; | |
378 | } | |
379 | ||
4bd80e12 | 380 | SR_PRIV int p_ols_receive_data(int fd, int revents, void *cb_data) |
381 | { | |
382 | struct dev_context *devc; | |
383 | struct sr_dev_inst *sdi; | |
384 | struct sr_datafeed_packet packet; | |
385 | struct sr_datafeed_logic logic; | |
386 | uint32_t sample; | |
387 | int num_channels, offset, j; | |
388 | int bytes_read, index; | |
389 | unsigned int i; | |
390 | unsigned char byte; | |
391 | ||
392 | (void)fd; | |
393 | (void)revents; | |
394 | ||
395 | sdi = cb_data; | |
396 | devc = sdi->priv; | |
397 | ||
398 | if (devc->num_transfers++ == 0) { | |
399 | devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4); | |
400 | if (!devc->raw_sample_buf) { | |
401 | sr_err("Sample buffer malloc failed."); | |
402 | return FALSE; | |
403 | } | |
404 | /* fill with 1010... for debugging */ | |
405 | memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4); | |
406 | } | |
407 | ||
b94cff40 | 408 | if ((devc->num_samples < devc->limit_samples) && (devc->cnt_samples < devc->max_samples)) { |
4bd80e12 | 409 | |
410 | num_channels = 0; | |
411 | for (i = NUM_CHANNELS; i > 0x02; i /= 2) { | |
412 | if ((devc->flag_reg & i) == 0) { | |
413 | num_channels++; | |
414 | } | |
415 | } | |
416 | ||
417 | /* Get a block of data. */ | |
418 | bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE); | |
419 | if (bytes_read < 0) { | |
420 | sr_err("Failed to read FTDI data (%d): %s.", | |
421 | bytes_read, ftdi_get_error_string(devc->ftdic)); | |
d2f7c417 | 422 | sr_dev_acquisition_stop(sdi); |
4bd80e12 | 423 | return FALSE; |
424 | } | |
425 | if (bytes_read == 0) { | |
426 | sr_spew("Received 0 bytes, nothing to do."); | |
427 | return TRUE; | |
428 | } | |
429 | ||
430 | sr_dbg("Received %d bytes", bytes_read); | |
431 | ||
432 | index = 0; | |
433 | while (index < bytes_read) { | |
434 | byte = devc->ftdi_buf[index++]; | |
435 | devc->cnt_bytes++; | |
436 | ||
437 | devc->sample[devc->num_bytes++] = byte; | |
438 | sr_spew("Received byte 0x%.2x.", byte); | |
b94cff40 | 439 | |
440 | if ((devc->flag_reg & FLAG_DEMUX) && (devc->flag_reg & FLAG_RLE)) { | |
176d785d | 441 | /* RLE in demux mode must be processed differently |
b94cff40 | 442 | * since in this case the RLE encoder is operating on pairs of samples. |
443 | */ | |
444 | if (devc->num_bytes == num_channels * 2) { | |
445 | devc->cnt_samples += 2; | |
446 | devc->cnt_samples_rle += 2; | |
4bd80e12 | 447 | /* |
b94cff40 | 448 | * Got a sample pair. Convert from the OLS's little-endian |
449 | * sample to the local format. | |
450 | */ | |
451 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
452 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
453 | sr_spew("Received sample pair 0x%.*x.", devc->num_bytes * 2, sample); | |
454 | ||
455 | /* | |
456 | * In RLE mode the high bit of the sample pair is the | |
457 | * "count" flag, meaning this sample pair is the number | |
458 | * of times the previous sample pair occurred. | |
4bd80e12 | 459 | */ |
460 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
461 | /* Clear the high bit. */ | |
462 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
463 | devc->rle_count = sample; | |
b94cff40 | 464 | devc->cnt_samples_rle += devc->rle_count * 2; |
465 | sr_dbg("RLE count: %u.", devc->rle_count * 2); | |
4bd80e12 | 466 | devc->num_bytes = 0; |
467 | continue; | |
468 | } | |
b94cff40 | 469 | devc->num_samples += (devc->rle_count + 1) * 2; |
470 | if (devc->num_samples > devc->limit_samples) { | |
471 | /* Save us from overrunning the buffer. */ | |
472 | devc->rle_count -= (devc->num_samples - devc->limit_samples) / 2; | |
473 | devc->num_samples = devc->limit_samples; | |
474 | index = bytes_read; | |
475 | } | |
4bd80e12 | 476 | |
4bd80e12 | 477 | /* |
478 | * Some channel groups may have been turned | |
479 | * off, to speed up transfer between the | |
480 | * hardware and the PC. Expand that here before | |
481 | * submitting it over the session bus -- | |
482 | * whatever is listening on the bus will be | |
483 | * expecting a full 32-bit sample, based on | |
484 | * the number of channels. | |
485 | */ | |
486 | j = 0; | |
b94cff40 | 487 | /* expand first sample */ |
4bd80e12 | 488 | memset(devc->tmp_sample, 0, 4); |
b94cff40 | 489 | for (i = 0; i < 2; i++) { |
4bd80e12 | 490 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { |
491 | /* | |
492 | * This channel group was | |
493 | * enabled, copy from received | |
494 | * sample. | |
495 | */ | |
496 | devc->tmp_sample[i] = devc->sample[j++]; | |
176d785d | 497 | } |
4bd80e12 | 498 | } |
b94cff40 | 499 | /* Clear out the most significant bit of the sample */ |
500 | devc->tmp_sample[devc->num_bytes - 1] &= 0x7f; | |
6433156c DE |
501 | sr_spew("Expanded sample 1: 0x%.2x%.2x%.2x%.2x.", |
502 | devc->tmp_sample[3], devc->tmp_sample[2], | |
503 | devc->tmp_sample[1], devc->tmp_sample[0]); | |
b94cff40 | 504 | |
505 | /* expand second sample */ | |
506 | memset(devc->tmp_sample2, 0, 4); | |
507 | for (i = 0; i < 2; i++) { | |
508 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
509 | /* | |
510 | * This channel group was | |
511 | * enabled, copy from received | |
512 | * sample. | |
513 | */ | |
514 | devc->tmp_sample2[i] = devc->sample[j++]; | |
176d785d | 515 | } |
b94cff40 | 516 | } |
517 | /* Clear out the most significant bit of the sample */ | |
518 | devc->tmp_sample2[devc->num_bytes - 1] &= 0x7f; | |
6433156c DE |
519 | sr_spew("Expanded sample 2: 0x%.2x%.2x%.2x%.2x.", |
520 | devc->tmp_sample2[3], devc->tmp_sample2[2], | |
521 | devc->tmp_sample2[1], devc->tmp_sample2[0]); | |
b94cff40 | 522 | |
523 | /* | |
524 | * OLS sends its sample buffer backwards. | |
525 | * store it in reverse order here, so we can dump | |
526 | * this on the session bus later. | |
527 | */ | |
528 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
529 | for (i = 0; i <= devc->rle_count; i++) { | |
530 | memcpy(devc->raw_sample_buf + offset + (i * 8), | |
531 | devc->tmp_sample2, 4); | |
532 | memcpy(devc->raw_sample_buf + offset + (4 + (i * 8)), | |
533 | devc->tmp_sample, 4); | |
534 | } | |
535 | memset(devc->sample, 0, 4); | |
536 | devc->num_bytes = 0; | |
537 | devc->rle_count = 0; | |
4bd80e12 | 538 | } |
b94cff40 | 539 | } |
540 | else { | |
541 | if (devc->num_bytes == num_channels) { | |
542 | devc->cnt_samples++; | |
543 | devc->cnt_samples_rle++; | |
544 | /* | |
545 | * Got a full sample. Convert from the OLS's little-endian | |
546 | * sample to the local format. | |
547 | */ | |
548 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
549 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
550 | sr_spew("Received sample 0x%.*x.", devc->num_bytes * 2, sample); | |
551 | if (devc->flag_reg & FLAG_RLE) { | |
552 | /* | |
553 | * In RLE mode the high bit of the sample is the | |
554 | * "count" flag, meaning this sample is the number | |
555 | * of times the previous sample occurred. | |
556 | */ | |
557 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
558 | /* Clear the high bit. */ | |
559 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
560 | devc->rle_count = sample; | |
561 | devc->cnt_samples_rle += devc->rle_count; | |
562 | sr_dbg("RLE count: %u.", devc->rle_count); | |
563 | devc->num_bytes = 0; | |
564 | continue; | |
565 | } | |
566 | } | |
567 | devc->num_samples += devc->rle_count + 1; | |
568 | if (devc->num_samples > devc->limit_samples) { | |
569 | /* Save us from overrunning the buffer. */ | |
570 | devc->rle_count -= devc->num_samples - devc->limit_samples; | |
571 | devc->num_samples = devc->limit_samples; | |
572 | index = bytes_read; | |
573 | } | |
574 | ||
575 | if (num_channels < 4) { | |
576 | /* | |
577 | * Some channel groups may have been turned | |
578 | * off, to speed up transfer between the | |
579 | * hardware and the PC. Expand that here before | |
580 | * submitting it over the session bus -- | |
581 | * whatever is listening on the bus will be | |
582 | * expecting a full 32-bit sample, based on | |
583 | * the number of channels. | |
584 | */ | |
585 | j = 0; | |
586 | memset(devc->tmp_sample, 0, 4); | |
587 | for (i = 0; i < 4; i++) { | |
588 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
589 | /* | |
590 | * This channel group was | |
591 | * enabled, copy from received | |
592 | * sample. | |
593 | */ | |
594 | devc->tmp_sample[i] = devc->sample[j++]; | |
176d785d | 595 | } |
b94cff40 | 596 | } |
597 | memcpy(devc->sample, devc->tmp_sample, 4); | |
598 | sr_spew("Expanded sample: 0x%.8x.", sample); | |
599 | } | |
4bd80e12 | 600 | |
b94cff40 | 601 | /* |
602 | * Pipistrello OLS sends its sample buffer backwards. | |
603 | * store it in reverse order here, so we can dump | |
604 | * this on the session bus later. | |
605 | */ | |
606 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
607 | for (i = 0; i <= devc->rle_count; i++) { | |
608 | memcpy(devc->raw_sample_buf + offset + (i * 4), | |
609 | devc->sample, 4); | |
610 | } | |
611 | memset(devc->sample, 0, 4); | |
612 | devc->num_bytes = 0; | |
613 | devc->rle_count = 0; | |
4bd80e12 | 614 | } |
4bd80e12 | 615 | } |
616 | } | |
617 | return TRUE; | |
618 | } else { | |
dc89faea UH |
619 | do { |
620 | bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE); | |
621 | } while (bytes_read > 0); | |
b94cff40 | 622 | |
4bd80e12 | 623 | /* |
624 | * We've acquired all the samples we asked for -- we're done. | |
625 | * Send the (properly-ordered) buffer to the frontend. | |
626 | */ | |
627 | sr_dbg("Received %d bytes, %d samples, %d decompressed samples.", | |
628 | devc->cnt_bytes, devc->cnt_samples, | |
629 | devc->cnt_samples_rle); | |
630 | if (devc->trigger_at != -1) { | |
631 | /* | |
632 | * A trigger was set up, so we need to tell the frontend | |
633 | * about it. | |
634 | */ | |
635 | if (devc->trigger_at > 0) { | |
636 | /* There are pre-trigger samples, send those first. */ | |
637 | packet.type = SR_DF_LOGIC; | |
638 | packet.payload = &logic; | |
639 | logic.length = devc->trigger_at * 4; | |
640 | logic.unitsize = 4; | |
641 | logic.data = devc->raw_sample_buf + | |
642 | (devc->limit_samples - devc->num_samples) * 4; | |
695dc859 | 643 | sr_session_send(sdi, &packet); |
4bd80e12 | 644 | } |
645 | ||
646 | /* Send the trigger. */ | |
647 | packet.type = SR_DF_TRIGGER; | |
695dc859 | 648 | sr_session_send(sdi, &packet); |
4bd80e12 | 649 | |
650 | /* Send post-trigger samples. */ | |
651 | packet.type = SR_DF_LOGIC; | |
652 | packet.payload = &logic; | |
653 | logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4); | |
654 | logic.unitsize = 4; | |
655 | logic.data = devc->raw_sample_buf + devc->trigger_at * 4 + | |
656 | (devc->limit_samples - devc->num_samples) * 4; | |
695dc859 | 657 | sr_session_send(sdi, &packet); |
4bd80e12 | 658 | } else { |
659 | /* no trigger was used */ | |
660 | packet.type = SR_DF_LOGIC; | |
661 | packet.payload = &logic; | |
662 | logic.length = devc->num_samples * 4; | |
663 | logic.unitsize = 4; | |
664 | logic.data = devc->raw_sample_buf + | |
665 | (devc->limit_samples - devc->num_samples) * 4; | |
695dc859 | 666 | sr_session_send(sdi, &packet); |
4bd80e12 | 667 | } |
668 | g_free(devc->raw_sample_buf); | |
669 | ||
d2f7c417 | 670 | sr_dev_acquisition_stop(sdi); |
4bd80e12 | 671 | } |
672 | ||
673 | return TRUE; | |
674 | } |