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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 | } | |
83 | sr_dbg("FTDI chip interface B set successfully."); | |
84 | ||
85 | /* Check for the device and temporarily open it. */ | |
86 | ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID, | |
87 | USB_IPRODUCT, NULL); | |
88 | if (ret < 0) { | |
89 | /* Log errors, except for -3 ("device not found"). */ | |
90 | if (ret != -3) | |
91 | sr_err("Failed to open device (%d): %s", ret, | |
92 | ftdi_get_error_string(devc->ftdic)); | |
93 | return SR_ERR; | |
94 | } | |
95 | sr_dbg("FTDI device opened successfully."); | |
96 | ||
97 | /* Purge RX/TX buffers in the FTDI chip. */ | |
98 | if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) { | |
99 | sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.", | |
100 | ret, ftdi_get_error_string(devc->ftdic)); | |
101 | goto err_open_close_ftdic; | |
102 | } | |
103 | sr_dbg("FTDI chip buffers purged successfully."); | |
104 | ||
105 | /* Reset the FTDI bitmode. */ | |
106 | ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET); | |
107 | if (ret < 0) { | |
108 | sr_err("Failed to reset the FTDI chip bitmode (%d): %s.", | |
109 | ret, ftdi_get_error_string(devc->ftdic)); | |
110 | goto err_open_close_ftdic; | |
111 | } | |
112 | sr_dbg("FTDI chip bitmode reset successfully."); | |
113 | ||
114 | /* Set the FTDI latency timer to 16. */ | |
115 | ret = ftdi_set_latency_timer(devc->ftdic, 16); | |
116 | if (ret < 0) { | |
117 | sr_err("Failed to set FTDI latency timer (%d): %s.", | |
118 | ret, ftdi_get_error_string(devc->ftdic)); | |
119 | goto err_open_close_ftdic; | |
120 | } | |
121 | sr_dbg("FTDI chip latency timer set successfully."); | |
122 | ||
123 | /* Set the FTDI read data chunk size to 64kB. */ | |
124 | ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024); | |
125 | if (ret < 0) { | |
126 | sr_err("Failed to set FTDI read data chunk size (%d): %s.", | |
127 | ret, ftdi_get_error_string(devc->ftdic)); | |
128 | goto err_open_close_ftdic; | |
129 | } | |
130 | sr_dbg("FTDI chip read data chunk size set successfully."); | |
131 | ||
132 | return SR_OK; | |
133 | ||
134 | err_open_close_ftdic: | |
1f9bcd0f | 135 | ftdi_usb_close(devc->ftdic); |
4bd80e12 | 136 | return SR_ERR; |
137 | } | |
138 | ||
139 | SR_PRIV int p_ols_close(struct dev_context *devc) | |
140 | { | |
141 | int ret; | |
142 | ||
143 | /* Note: Caller checks devc and devc->ftdic. */ | |
144 | ||
145 | if ((ret = ftdi_usb_close(devc->ftdic)) < 0) { | |
146 | sr_err("Failed to close FTDI device (%d): %s.", | |
147 | ret, ftdi_get_error_string(devc->ftdic)); | |
148 | return SR_ERR; | |
149 | } | |
150 | ||
151 | return SR_OK; | |
152 | } | |
153 | ||
acc885c7 BV |
154 | /* Configures the channel mask based on which channels are enabled. */ |
155 | SR_PRIV void pols_channel_mask(const struct sr_dev_inst *sdi) | |
4bd80e12 | 156 | { |
157 | struct dev_context *devc; | |
acc885c7 | 158 | struct sr_channel *channel; |
4bd80e12 | 159 | const GSList *l; |
4bd80e12 | 160 | |
161 | devc = sdi->priv; | |
162 | ||
163 | devc->channel_mask = 0; | |
acc885c7 BV |
164 | for (l = sdi->channels; l; l = l->next) { |
165 | channel = l->data; | |
166 | if (channel->enabled) | |
167 | devc->channel_mask |= 1 << channel->index; | |
168 | } | |
169 | } | |
170 | ||
171 | SR_PRIV int pols_convert_trigger(const struct sr_dev_inst *sdi) | |
172 | { | |
173 | struct dev_context *devc; | |
174 | struct sr_trigger *trigger; | |
175 | struct sr_trigger_stage *stage; | |
176 | struct sr_trigger_match *match; | |
177 | const GSList *l, *m; | |
178 | int i; | |
179 | ||
180 | devc = sdi->priv; | |
181 | ||
182 | devc->num_stages = 0; | |
4bd80e12 | 183 | for (i = 0; i < NUM_TRIGGER_STAGES; i++) { |
184 | devc->trigger_mask[i] = 0; | |
185 | devc->trigger_value[i] = 0; | |
1e0de846 | 186 | devc->trigger_edge[i] = 0; |
4bd80e12 | 187 | } |
188 | ||
acc885c7 BV |
189 | if (!(trigger = sr_session_trigger_get(sdi->session))) |
190 | return SR_OK; | |
4bd80e12 | 191 | |
acc885c7 BV |
192 | devc->num_stages = g_slist_length(trigger->stages); |
193 | if (devc->num_stages > NUM_TRIGGER_STAGES) { | |
194 | sr_err("This device only supports %d trigger stages.", | |
195 | NUM_TRIGGER_STAGES); | |
196 | return SR_ERR; | |
197 | } | |
4bd80e12 | 198 | |
acc885c7 BV |
199 | for (l = trigger->stages; l; l = l->next) { |
200 | stage = l->data; | |
201 | for (m = stage->matches; m; m = m->next) { | |
202 | match = m->data; | |
203 | if (!match->channel->enabled) | |
204 | /* Ignore disabled channels with a trigger. */ | |
205 | continue; | |
206 | devc->trigger_mask[stage->stage] |= 1 << match->channel->index; | |
207 | if (match->match == SR_TRIGGER_ONE || match->match == SR_TRIGGER_RISING) | |
208 | devc->trigger_value[stage->stage] |= 1 << match->channel->index; | |
209 | if (match->match == SR_TRIGGER_RISING || match->match == SR_TRIGGER_FALLING) | |
210 | devc->trigger_edge[stage->stage] |= 1 << match->channel->index; | |
4bd80e12 | 211 | } |
4bd80e12 | 212 | } |
213 | ||
214 | return SR_OK; | |
215 | } | |
216 | ||
217 | SR_PRIV struct sr_dev_inst *p_ols_get_metadata(uint8_t *buf, int bytes_read, struct dev_context *devc) | |
218 | { | |
219 | struct sr_dev_inst *sdi; | |
4bd80e12 | 220 | uint32_t tmp_int, ui; |
221 | uint8_t key, type, token; | |
222 | GString *tmp_str, *devname, *version; | |
223 | guchar tmp_c; | |
224 | int index, i; | |
225 | ||
aac29cc1 | 226 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); |
0af636be | 227 | sdi->status = SR_ST_INACTIVE; |
4bd80e12 | 228 | sdi->priv = devc; |
229 | ||
230 | devname = g_string_new(""); | |
231 | version = g_string_new(""); | |
232 | ||
233 | index = 0; | |
234 | while (index < bytes_read) { | |
235 | key = buf[index++]; | |
236 | if (key == 0x00) { | |
237 | sr_dbg("Got metadata key 0x00, metadata ends."); | |
238 | break; | |
239 | } | |
240 | type = key >> 5; | |
241 | token = key & 0x1f; | |
242 | switch (type) { | |
243 | case 0: | |
244 | /* NULL-terminated string */ | |
245 | tmp_str = g_string_new(""); | |
246 | while ((index < bytes_read) && ((tmp_c = buf[index++]) != '\0')) | |
247 | g_string_append_c(tmp_str, tmp_c); | |
248 | sr_dbg("Got metadata key 0x%.2x value '%s'.", | |
249 | key, tmp_str->str); | |
250 | switch (token) { | |
251 | case 0x01: | |
252 | /* Device name */ | |
253 | devname = g_string_append(devname, tmp_str->str); | |
254 | break; | |
255 | case 0x02: | |
256 | /* FPGA firmware version */ | |
257 | if (version->len) | |
258 | g_string_append(version, ", "); | |
259 | g_string_append(version, "FPGA version "); | |
260 | g_string_append(version, tmp_str->str); | |
261 | break; | |
262 | case 0x03: | |
263 | /* Ancillary version */ | |
264 | if (version->len) | |
265 | g_string_append(version, ", "); | |
266 | g_string_append(version, "Ancillary version "); | |
267 | g_string_append(version, tmp_str->str); | |
268 | break; | |
269 | default: | |
270 | sr_info("Unknown token 0x%.2x: '%s'", | |
271 | token, tmp_str->str); | |
272 | break; | |
273 | } | |
274 | g_string_free(tmp_str, TRUE); | |
275 | break; | |
276 | case 1: | |
277 | /* 32-bit unsigned integer */ | |
278 | tmp_int = 0; | |
279 | for (i = 0; i < 4; i++) { | |
280 | tmp_int = (tmp_int << 8) | buf[index++]; | |
281 | } | |
282 | sr_dbg("Got metadata key 0x%.2x value 0x%.8x.", | |
283 | key, tmp_int); | |
284 | switch (token) { | |
285 | case 0x00: | |
286 | /* Number of usable channels */ | |
5e23fcab ML |
287 | for (ui = 0; ui < tmp_int; ui++) |
288 | sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE, | |
c368e6f3 | 289 | p_ols_channel_names[ui]); |
4bd80e12 | 290 | break; |
291 | case 0x01: | |
292 | /* Amount of sample memory available (bytes) */ | |
b94cff40 | 293 | devc->max_samplebytes = tmp_int; |
4bd80e12 | 294 | break; |
295 | case 0x02: | |
296 | /* Amount of dynamic memory available (bytes) */ | |
297 | /* what is this for? */ | |
298 | break; | |
299 | case 0x03: | |
f3f19d11 | 300 | /* Maximum sample rate (Hz) */ |
4bd80e12 | 301 | devc->max_samplerate = tmp_int; |
302 | break; | |
303 | case 0x04: | |
304 | /* protocol version */ | |
305 | devc->protocol_version = tmp_int; | |
306 | break; | |
307 | default: | |
308 | sr_info("Unknown token 0x%.2x: 0x%.8x.", | |
309 | token, tmp_int); | |
310 | break; | |
311 | } | |
312 | break; | |
313 | case 2: | |
314 | /* 8-bit unsigned integer */ | |
315 | tmp_c = buf[index++]; | |
316 | sr_dbg("Got metadata key 0x%.2x value 0x%.2x.", | |
317 | key, tmp_c); | |
318 | switch (token) { | |
319 | case 0x00: | |
320 | /* Number of usable channels */ | |
5e23fcab ML |
321 | for (ui = 0; ui < tmp_c; ui++) |
322 | sr_channel_new(sdi, ui, SR_CHANNEL_LOGIC, TRUE, | |
c368e6f3 | 323 | p_ols_channel_names[ui]); |
4bd80e12 | 324 | break; |
325 | case 0x01: | |
326 | /* protocol version */ | |
327 | devc->protocol_version = tmp_c; | |
328 | break; | |
329 | default: | |
330 | sr_info("Unknown token 0x%.2x: 0x%.2x.", | |
331 | token, tmp_c); | |
332 | break; | |
333 | } | |
334 | break; | |
335 | default: | |
336 | /* unknown type */ | |
337 | break; | |
338 | } | |
339 | } | |
340 | ||
341 | sdi->model = devname->str; | |
342 | sdi->version = version->str; | |
343 | g_string_free(devname, FALSE); | |
344 | g_string_free(version, FALSE); | |
345 | ||
346 | return sdi; | |
347 | } | |
348 | ||
349 | SR_PRIV int p_ols_set_samplerate(const struct sr_dev_inst *sdi, | |
350 | const uint64_t samplerate) | |
351 | { | |
352 | struct dev_context *devc; | |
353 | ||
354 | devc = sdi->priv; | |
355 | if (devc->max_samplerate && samplerate > devc->max_samplerate) | |
356 | return SR_ERR_SAMPLERATE; | |
357 | ||
358 | if (samplerate > CLOCK_RATE) { | |
359 | sr_info("Enabling demux mode."); | |
360 | devc->flag_reg |= FLAG_DEMUX; | |
361 | devc->flag_reg &= ~FLAG_FILTER; | |
362 | devc->max_channels = NUM_CHANNELS / 2; | |
363 | devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1; | |
364 | } else { | |
365 | sr_info("Disabling demux mode."); | |
366 | devc->flag_reg &= ~FLAG_DEMUX; | |
367 | devc->flag_reg |= FLAG_FILTER; | |
368 | devc->max_channels = NUM_CHANNELS; | |
369 | devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1; | |
370 | } | |
371 | ||
372 | /* Calculate actual samplerate used and complain if it is different | |
373 | * from the requested. | |
374 | */ | |
375 | devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1); | |
376 | if (devc->flag_reg & FLAG_DEMUX) | |
377 | devc->cur_samplerate *= 2; | |
378 | if (devc->cur_samplerate != samplerate) | |
379 | sr_info("Can't match samplerate %" PRIu64 ", using %" | |
380 | PRIu64 ".", samplerate, devc->cur_samplerate); | |
381 | ||
382 | return SR_OK; | |
383 | } | |
384 | ||
4bd80e12 | 385 | SR_PRIV int p_ols_receive_data(int fd, int revents, void *cb_data) |
386 | { | |
387 | struct dev_context *devc; | |
388 | struct sr_dev_inst *sdi; | |
389 | struct sr_datafeed_packet packet; | |
390 | struct sr_datafeed_logic logic; | |
391 | uint32_t sample; | |
392 | int num_channels, offset, j; | |
393 | int bytes_read, index; | |
394 | unsigned int i; | |
395 | unsigned char byte; | |
396 | ||
397 | (void)fd; | |
398 | (void)revents; | |
399 | ||
400 | sdi = cb_data; | |
401 | devc = sdi->priv; | |
402 | ||
403 | if (devc->num_transfers++ == 0) { | |
404 | devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4); | |
405 | if (!devc->raw_sample_buf) { | |
406 | sr_err("Sample buffer malloc failed."); | |
407 | return FALSE; | |
408 | } | |
409 | /* fill with 1010... for debugging */ | |
410 | memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4); | |
411 | } | |
412 | ||
b94cff40 | 413 | if ((devc->num_samples < devc->limit_samples) && (devc->cnt_samples < devc->max_samples)) { |
4bd80e12 | 414 | |
415 | num_channels = 0; | |
416 | for (i = NUM_CHANNELS; i > 0x02; i /= 2) { | |
417 | if ((devc->flag_reg & i) == 0) { | |
418 | num_channels++; | |
419 | } | |
420 | } | |
421 | ||
422 | /* Get a block of data. */ | |
423 | bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE); | |
424 | if (bytes_read < 0) { | |
425 | sr_err("Failed to read FTDI data (%d): %s.", | |
426 | bytes_read, ftdi_get_error_string(devc->ftdic)); | |
695dc859 | 427 | sdi->driver->dev_acquisition_stop(sdi); |
4bd80e12 | 428 | return FALSE; |
429 | } | |
430 | if (bytes_read == 0) { | |
431 | sr_spew("Received 0 bytes, nothing to do."); | |
432 | return TRUE; | |
433 | } | |
434 | ||
435 | sr_dbg("Received %d bytes", bytes_read); | |
436 | ||
437 | index = 0; | |
438 | while (index < bytes_read) { | |
439 | byte = devc->ftdi_buf[index++]; | |
440 | devc->cnt_bytes++; | |
441 | ||
442 | devc->sample[devc->num_bytes++] = byte; | |
443 | sr_spew("Received byte 0x%.2x.", byte); | |
b94cff40 | 444 | |
445 | if ((devc->flag_reg & FLAG_DEMUX) && (devc->flag_reg & FLAG_RLE)) { | |
446 | /* RLE in demux mode must be processed differently | |
447 | * since in this case the RLE encoder is operating on pairs of samples. | |
448 | */ | |
449 | if (devc->num_bytes == num_channels * 2) { | |
450 | devc->cnt_samples += 2; | |
451 | devc->cnt_samples_rle += 2; | |
4bd80e12 | 452 | /* |
b94cff40 | 453 | * Got a sample pair. Convert from the OLS's little-endian |
454 | * sample to the local format. | |
455 | */ | |
456 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
457 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
458 | sr_spew("Received sample pair 0x%.*x.", devc->num_bytes * 2, sample); | |
459 | ||
460 | /* | |
461 | * In RLE mode the high bit of the sample pair is the | |
462 | * "count" flag, meaning this sample pair is the number | |
463 | * of times the previous sample pair occurred. | |
4bd80e12 | 464 | */ |
465 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
466 | /* Clear the high bit. */ | |
467 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
468 | devc->rle_count = sample; | |
b94cff40 | 469 | devc->cnt_samples_rle += devc->rle_count * 2; |
470 | sr_dbg("RLE count: %u.", devc->rle_count * 2); | |
4bd80e12 | 471 | devc->num_bytes = 0; |
472 | continue; | |
473 | } | |
b94cff40 | 474 | devc->num_samples += (devc->rle_count + 1) * 2; |
475 | if (devc->num_samples > devc->limit_samples) { | |
476 | /* Save us from overrunning the buffer. */ | |
477 | devc->rle_count -= (devc->num_samples - devc->limit_samples) / 2; | |
478 | devc->num_samples = devc->limit_samples; | |
479 | index = bytes_read; | |
480 | } | |
4bd80e12 | 481 | |
4bd80e12 | 482 | /* |
483 | * Some channel groups may have been turned | |
484 | * off, to speed up transfer between the | |
485 | * hardware and the PC. Expand that here before | |
486 | * submitting it over the session bus -- | |
487 | * whatever is listening on the bus will be | |
488 | * expecting a full 32-bit sample, based on | |
489 | * the number of channels. | |
490 | */ | |
491 | j = 0; | |
b94cff40 | 492 | /* expand first sample */ |
4bd80e12 | 493 | memset(devc->tmp_sample, 0, 4); |
b94cff40 | 494 | for (i = 0; i < 2; i++) { |
4bd80e12 | 495 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { |
496 | /* | |
497 | * This channel group was | |
498 | * enabled, copy from received | |
499 | * sample. | |
500 | */ | |
501 | devc->tmp_sample[i] = devc->sample[j++]; | |
b94cff40 | 502 | } |
4bd80e12 | 503 | } |
b94cff40 | 504 | /* Clear out the most significant bit of the sample */ |
505 | devc->tmp_sample[devc->num_bytes - 1] &= 0x7f; | |
6433156c DE |
506 | sr_spew("Expanded sample 1: 0x%.2x%.2x%.2x%.2x.", |
507 | devc->tmp_sample[3], devc->tmp_sample[2], | |
508 | devc->tmp_sample[1], devc->tmp_sample[0]); | |
b94cff40 | 509 | |
510 | /* expand second sample */ | |
511 | memset(devc->tmp_sample2, 0, 4); | |
512 | for (i = 0; i < 2; i++) { | |
513 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
514 | /* | |
515 | * This channel group was | |
516 | * enabled, copy from received | |
517 | * sample. | |
518 | */ | |
519 | devc->tmp_sample2[i] = devc->sample[j++]; | |
520 | } | |
521 | } | |
522 | /* Clear out the most significant bit of the sample */ | |
523 | devc->tmp_sample2[devc->num_bytes - 1] &= 0x7f; | |
6433156c DE |
524 | sr_spew("Expanded sample 2: 0x%.2x%.2x%.2x%.2x.", |
525 | devc->tmp_sample2[3], devc->tmp_sample2[2], | |
526 | devc->tmp_sample2[1], devc->tmp_sample2[0]); | |
b94cff40 | 527 | |
528 | /* | |
529 | * OLS sends its sample buffer backwards. | |
530 | * store it in reverse order here, so we can dump | |
531 | * this on the session bus later. | |
532 | */ | |
533 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
534 | for (i = 0; i <= devc->rle_count; i++) { | |
535 | memcpy(devc->raw_sample_buf + offset + (i * 8), | |
536 | devc->tmp_sample2, 4); | |
537 | memcpy(devc->raw_sample_buf + offset + (4 + (i * 8)), | |
538 | devc->tmp_sample, 4); | |
539 | } | |
540 | memset(devc->sample, 0, 4); | |
541 | devc->num_bytes = 0; | |
542 | devc->rle_count = 0; | |
4bd80e12 | 543 | } |
b94cff40 | 544 | } |
545 | else { | |
546 | if (devc->num_bytes == num_channels) { | |
547 | devc->cnt_samples++; | |
548 | devc->cnt_samples_rle++; | |
549 | /* | |
550 | * Got a full sample. Convert from the OLS's little-endian | |
551 | * sample to the local format. | |
552 | */ | |
553 | sample = devc->sample[0] | (devc->sample[1] << 8) \ | |
554 | | (devc->sample[2] << 16) | (devc->sample[3] << 24); | |
555 | sr_spew("Received sample 0x%.*x.", devc->num_bytes * 2, sample); | |
556 | if (devc->flag_reg & FLAG_RLE) { | |
557 | /* | |
558 | * In RLE mode the high bit of the sample is the | |
559 | * "count" flag, meaning this sample is the number | |
560 | * of times the previous sample occurred. | |
561 | */ | |
562 | if (devc->sample[devc->num_bytes - 1] & 0x80) { | |
563 | /* Clear the high bit. */ | |
564 | sample &= ~(0x80 << (devc->num_bytes - 1) * 8); | |
565 | devc->rle_count = sample; | |
566 | devc->cnt_samples_rle += devc->rle_count; | |
567 | sr_dbg("RLE count: %u.", devc->rle_count); | |
568 | devc->num_bytes = 0; | |
569 | continue; | |
570 | } | |
571 | } | |
572 | devc->num_samples += devc->rle_count + 1; | |
573 | if (devc->num_samples > devc->limit_samples) { | |
574 | /* Save us from overrunning the buffer. */ | |
575 | devc->rle_count -= devc->num_samples - devc->limit_samples; | |
576 | devc->num_samples = devc->limit_samples; | |
577 | index = bytes_read; | |
578 | } | |
579 | ||
580 | if (num_channels < 4) { | |
581 | /* | |
582 | * Some channel groups may have been turned | |
583 | * off, to speed up transfer between the | |
584 | * hardware and the PC. Expand that here before | |
585 | * submitting it over the session bus -- | |
586 | * whatever is listening on the bus will be | |
587 | * expecting a full 32-bit sample, based on | |
588 | * the number of channels. | |
589 | */ | |
590 | j = 0; | |
591 | memset(devc->tmp_sample, 0, 4); | |
592 | for (i = 0; i < 4; i++) { | |
593 | if (((devc->flag_reg >> 2) & (1 << i)) == 0) { | |
594 | /* | |
595 | * This channel group was | |
596 | * enabled, copy from received | |
597 | * sample. | |
598 | */ | |
599 | devc->tmp_sample[i] = devc->sample[j++]; | |
600 | } | |
601 | } | |
602 | memcpy(devc->sample, devc->tmp_sample, 4); | |
603 | sr_spew("Expanded sample: 0x%.8x.", sample); | |
604 | } | |
4bd80e12 | 605 | |
b94cff40 | 606 | /* |
607 | * Pipistrello OLS sends its sample buffer backwards. | |
608 | * store it in reverse order here, so we can dump | |
609 | * this on the session bus later. | |
610 | */ | |
611 | offset = (devc->limit_samples - devc->num_samples) * 4; | |
612 | for (i = 0; i <= devc->rle_count; i++) { | |
613 | memcpy(devc->raw_sample_buf + offset + (i * 4), | |
614 | devc->sample, 4); | |
615 | } | |
616 | memset(devc->sample, 0, 4); | |
617 | devc->num_bytes = 0; | |
618 | devc->rle_count = 0; | |
4bd80e12 | 619 | } |
4bd80e12 | 620 | } |
621 | } | |
622 | return TRUE; | |
623 | } else { | |
dc89faea UH |
624 | do { |
625 | bytes_read = ftdi_read_data(devc->ftdic, devc->ftdi_buf, FTDI_BUF_SIZE); | |
626 | } while (bytes_read > 0); | |
b94cff40 | 627 | |
4bd80e12 | 628 | /* |
629 | * We've acquired all the samples we asked for -- we're done. | |
630 | * Send the (properly-ordered) buffer to the frontend. | |
631 | */ | |
632 | sr_dbg("Received %d bytes, %d samples, %d decompressed samples.", | |
633 | devc->cnt_bytes, devc->cnt_samples, | |
634 | devc->cnt_samples_rle); | |
635 | if (devc->trigger_at != -1) { | |
636 | /* | |
637 | * A trigger was set up, so we need to tell the frontend | |
638 | * about it. | |
639 | */ | |
640 | if (devc->trigger_at > 0) { | |
641 | /* There are pre-trigger samples, send those first. */ | |
642 | packet.type = SR_DF_LOGIC; | |
643 | packet.payload = &logic; | |
644 | logic.length = devc->trigger_at * 4; | |
645 | logic.unitsize = 4; | |
646 | logic.data = devc->raw_sample_buf + | |
647 | (devc->limit_samples - devc->num_samples) * 4; | |
695dc859 | 648 | sr_session_send(sdi, &packet); |
4bd80e12 | 649 | } |
650 | ||
651 | /* Send the trigger. */ | |
652 | packet.type = SR_DF_TRIGGER; | |
695dc859 | 653 | sr_session_send(sdi, &packet); |
4bd80e12 | 654 | |
655 | /* Send post-trigger samples. */ | |
656 | packet.type = SR_DF_LOGIC; | |
657 | packet.payload = &logic; | |
658 | logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4); | |
659 | logic.unitsize = 4; | |
660 | logic.data = devc->raw_sample_buf + devc->trigger_at * 4 + | |
661 | (devc->limit_samples - devc->num_samples) * 4; | |
695dc859 | 662 | sr_session_send(sdi, &packet); |
4bd80e12 | 663 | } else { |
664 | /* no trigger was used */ | |
665 | packet.type = SR_DF_LOGIC; | |
666 | packet.payload = &logic; | |
667 | logic.length = devc->num_samples * 4; | |
668 | logic.unitsize = 4; | |
669 | logic.data = devc->raw_sample_buf + | |
670 | (devc->limit_samples - devc->num_samples) * 4; | |
695dc859 | 671 | sr_session_send(sdi, &packet); |
4bd80e12 | 672 | } |
673 | g_free(devc->raw_sample_buf); | |
674 | ||
695dc859 | 675 | sdi->driver->dev_acquisition_stop(sdi); |
4bd80e12 | 676 | } |
677 | ||
678 | return TRUE; | |
679 | } |