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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 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 <stdio.h> | |
21 | #include <stdint.h> | |
22 | #include <stdlib.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
27 | #include <string.h> | |
28 | #include <sys/time.h> | |
29 | #include <inttypes.h> | |
30 | #include <arpa/inet.h> | |
31 | #include <glib.h> | |
32 | #include <libusb.h> | |
33 | #include "sigrok.h" | |
34 | #include "sigrok-internal.h" | |
35 | #include "config.h" | |
36 | #include "dso.h" | |
37 | ||
38 | /* FIXME: Temporary build fix, this will be removed later. */ | |
39 | #define GTV_TO_MSEC(gtv) (gtv.tv_sec * 1000 + gtv.tv_usec / 1000) | |
40 | ||
41 | /* Max time in ms before we want to check on events */ | |
42 | #define TICK 1 | |
43 | ||
44 | static const int hwcaps[] = { | |
45 | SR_HWCAP_OSCILLOSCOPE, | |
46 | SR_HWCAP_LIMIT_SAMPLES, | |
47 | SR_HWCAP_CONTINUOUS, | |
48 | SR_HWCAP_TIMEBASE, | |
49 | SR_HWCAP_BUFFERSIZE, | |
50 | SR_HWCAP_TRIGGER_SOURCE, | |
51 | SR_HWCAP_TRIGGER_SLOPE, | |
52 | SR_HWCAP_HORIZ_TRIGGERPOS, | |
53 | SR_HWCAP_FILTER, | |
54 | SR_HWCAP_VDIV, | |
55 | SR_HWCAP_COUPLING, | |
56 | 0, | |
57 | }; | |
58 | ||
59 | static const char *probe_names[] = { | |
60 | "CH1", | |
61 | "CH2", | |
62 | NULL, | |
63 | }; | |
64 | ||
65 | static const struct dso_profile dev_profiles[] = { | |
66 | { 0x04b4, 0x2090, | |
67 | 0x04b5, 0x2090, | |
68 | "Hantek", "DSO-2090", | |
69 | NULL, 2, | |
70 | FIRMWARE_DIR "/hantek-dso-2090.fw" }, | |
71 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
72 | }; | |
73 | ||
74 | static const uint64_t buffersizes[] = { | |
75 | 10240, | |
76 | 32768, | |
77 | /* TODO: 65535 */ | |
78 | 0, | |
79 | }; | |
80 | ||
81 | static const struct sr_rational timebases[] = { | |
82 | /* microseconds */ | |
83 | { 10, 1000000 }, | |
84 | { 20, 1000000 }, | |
85 | { 40, 1000000 }, | |
86 | { 100, 1000000 }, | |
87 | { 200, 1000000 }, | |
88 | { 400, 1000000 }, | |
89 | /* milliseconds */ | |
90 | { 1, 1000 }, | |
91 | { 2, 1000 }, | |
92 | { 4, 1000 }, | |
93 | { 10, 1000 }, | |
94 | { 20, 1000 }, | |
95 | { 40, 1000 }, | |
96 | { 100, 1000 }, | |
97 | { 200, 1000 }, | |
98 | { 400, 1000 }, | |
99 | { 0, 0}, | |
100 | }; | |
101 | ||
102 | static const struct sr_rational vdivs[] = { | |
103 | /* millivolts */ | |
104 | { 10, 1000 }, | |
105 | { 20, 1000 }, | |
106 | { 50, 1000 }, | |
107 | { 100, 1000 }, | |
108 | { 200, 1000 }, | |
109 | { 500, 1000 }, | |
110 | /* volts */ | |
111 | { 1, 1 }, | |
112 | { 2, 1 }, | |
113 | { 5, 1 }, | |
114 | { 0, 0 }, | |
115 | }; | |
116 | ||
117 | static const char *trigger_sources[] = { | |
118 | "CH1", | |
119 | "CH2", | |
120 | "EXT", | |
121 | NULL, | |
122 | }; | |
123 | ||
124 | static const char *filter_targets[] = { | |
125 | "CH1", | |
126 | "CH2", | |
127 | /* TODO: "TRIGGER", */ | |
128 | NULL, | |
129 | }; | |
130 | ||
131 | static const char *coupling[] = { | |
132 | "AC", | |
133 | "DC", | |
134 | "GND", | |
135 | NULL, | |
136 | }; | |
137 | ||
138 | SR_PRIV libusb_context *usb_context = NULL; | |
139 | SR_PRIV GSList *dev_insts = NULL; | |
140 | ||
141 | static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof) | |
142 | { | |
143 | struct sr_dev_inst *sdi; | |
144 | struct context *ctx; | |
145 | ||
146 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
147 | prof->vendor, prof->model, prof->model_version); | |
148 | if (!sdi) | |
149 | return NULL; | |
150 | ||
151 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
152 | sr_err("hantek-dso: ctx malloc failed"); | |
153 | return NULL; | |
154 | } | |
155 | ctx->profile = prof; | |
156 | ctx->dev_state = IDLE; | |
157 | ctx->timebase = DEFAULT_TIMEBASE; | |
158 | ctx->ch1_enabled = TRUE; | |
159 | ctx->ch2_enabled = TRUE; | |
160 | ctx->voltage_ch1 = DEFAULT_VOLTAGE; | |
161 | ctx->voltage_ch2 = DEFAULT_VOLTAGE; | |
162 | ctx->coupling_ch1 = DEFAULT_COUPLING; | |
163 | ctx->coupling_ch2 = DEFAULT_COUPLING; | |
164 | ctx->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
165 | ctx->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
166 | ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
167 | ctx->framesize = DEFAULT_FRAMESIZE; | |
168 | ctx->triggerslope = SLOPE_POSITIVE; | |
169 | ctx->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE); | |
170 | ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
171 | sdi->priv = ctx; | |
172 | dev_insts = g_slist_append(dev_insts, sdi); | |
173 | ||
174 | return sdi; | |
175 | } | |
176 | ||
177 | static int configure_probes(struct context *ctx, const GSList *probes) | |
178 | { | |
179 | const struct sr_probe *probe; | |
180 | const GSList *l; | |
181 | ||
182 | ctx->ch1_enabled = ctx->ch2_enabled = FALSE; | |
183 | for (l = probes; l; l = l->next) { | |
184 | probe = (struct sr_probe *)l->data; | |
185 | if (probe->index == 1) | |
186 | ctx->ch1_enabled = probe->enabled; | |
187 | else if (probe->index == 2) | |
188 | ctx->ch2_enabled = probe->enabled; | |
189 | } | |
190 | ||
191 | return SR_OK; | |
192 | } | |
193 | ||
194 | static int hw_init(const char *devinfo) | |
195 | { | |
196 | struct sr_dev_inst *sdi; | |
197 | struct libusb_device_descriptor des; | |
198 | const struct dso_profile *prof; | |
199 | struct context *ctx; | |
200 | libusb_device **devlist; | |
201 | int err, devcnt, i, j; | |
202 | ||
203 | /* Avoid compiler warnings. */ | |
204 | (void)devinfo; | |
205 | ||
206 | if (libusb_init(&usb_context) != 0) { | |
207 | sr_err("hantek-dso: Failed to initialize USB."); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | /* Find all Hantek DSO devices and upload firmware to all of them. */ | |
212 | devcnt = 0; | |
213 | libusb_get_device_list(usb_context, &devlist); | |
214 | for (i = 0; devlist[i]; i++) { | |
215 | if ((err = libusb_get_device_descriptor(devlist[i], &des))) { | |
216 | sr_err("hantek-dso: failed to get device descriptor: %d", err); | |
217 | continue; | |
218 | } | |
219 | ||
220 | prof = NULL; | |
221 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
222 | if (des.idVendor == dev_profiles[j].orig_vid | |
223 | && des.idProduct == dev_profiles[j].orig_pid) { | |
224 | /* Device matches the pre-firmware profile. */ | |
225 | prof = &dev_profiles[j]; | |
226 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
227 | sdi = dso_dev_new(devcnt, prof); | |
228 | ctx = sdi->priv; | |
229 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
230 | prof->firmware) == SR_OK) | |
231 | /* Remember when the firmware on this device was updated */ | |
232 | g_get_current_time(&ctx->fw_updated); | |
233 | else | |
234 | sr_err("hantek-dso: firmware upload failed for " | |
235 | "device %d", devcnt); | |
236 | /* Dummy USB address of 0xff will get overwritten later. */ | |
237 | ctx->usb = sr_usb_dev_inst_new( | |
238 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
239 | devcnt++; | |
240 | break; | |
241 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
242 | && des.idProduct == dev_profiles[j].fw_pid) { | |
243 | /* Device matches the post-firmware profile. */ | |
244 | prof = &dev_profiles[j]; | |
245 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
246 | sdi = dso_dev_new(devcnt, prof); | |
247 | sdi->status = SR_ST_INACTIVE; | |
248 | ctx = sdi->priv; | |
249 | ctx->usb = sr_usb_dev_inst_new( | |
250 | libusb_get_bus_number(devlist[i]), | |
251 | libusb_get_device_address(devlist[i]), NULL); | |
252 | devcnt++; | |
253 | break; | |
254 | } | |
255 | } | |
256 | if (!prof) | |
257 | /* not a supported VID/PID */ | |
258 | continue; | |
259 | } | |
260 | libusb_free_device_list(devlist, 1); | |
261 | ||
262 | return devcnt; | |
263 | } | |
264 | ||
265 | static int hw_dev_open(int dev_index) | |
266 | { | |
267 | GTimeVal cur_time; | |
268 | struct sr_dev_inst *sdi; | |
269 | struct context *ctx; | |
270 | int timediff, err; | |
271 | ||
272 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
273 | return SR_ERR_ARG; | |
274 | ctx = sdi->priv; | |
275 | ||
276 | /* | |
277 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms | |
278 | * for the FX2 to renumerate | |
279 | */ | |
280 | err = 0; | |
281 | if (GTV_TO_MSEC(ctx->fw_updated) > 0) { | |
282 | sr_info("hantek-dso: waiting for device to reset"); | |
283 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
284 | g_usleep(300 * 1000); | |
285 | timediff = 0; | |
286 | while (timediff < MAX_RENUM_DELAY) { | |
287 | if ((err = dso_open(dev_index)) == SR_OK) | |
288 | break; | |
289 | g_usleep(100 * 1000); | |
290 | g_get_current_time(&cur_time); | |
291 | timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(ctx->fw_updated); | |
292 | } | |
293 | sr_info("hantek-dso: device came back after %d ms", timediff); | |
294 | } else { | |
295 | err = dso_open(dev_index); | |
296 | } | |
297 | ||
298 | if (err != SR_OK) { | |
299 | sr_err("hantek-dso: unable to open device"); | |
300 | return SR_ERR; | |
301 | } | |
302 | ||
303 | err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
304 | if (err != 0) { | |
305 | sr_err("hantek-dso: Unable to claim interface: %d", err); | |
306 | return SR_ERR; | |
307 | } | |
308 | ||
309 | return SR_OK; | |
310 | } | |
311 | ||
312 | static int hw_dev_close(int dev_index) | |
313 | { | |
314 | struct sr_dev_inst *sdi; | |
315 | ||
316 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
317 | return SR_ERR_ARG; | |
318 | ||
319 | dso_close(sdi); | |
320 | ||
321 | return SR_OK; | |
322 | } | |
323 | ||
324 | static int hw_cleanup(void) | |
325 | { | |
326 | GSList *l; | |
327 | struct sr_dev_inst *sdi; | |
328 | struct context *ctx; | |
329 | ||
330 | /* Properly close and free all devices. */ | |
331 | for (l = dev_insts; l; l = l->next) { | |
332 | if (!(sdi = l->data)) { | |
333 | /* Log error, but continue cleaning up the rest. */ | |
334 | sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__); | |
335 | continue; | |
336 | } | |
337 | if (!(ctx = sdi->priv)) { | |
338 | /* Log error, but continue cleaning up the rest. */ | |
339 | sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__); | |
340 | continue; | |
341 | } | |
342 | dso_close(sdi); | |
343 | sr_usb_dev_inst_free(ctx->usb); | |
344 | g_free(ctx->triggersource); | |
345 | ||
346 | sr_dev_inst_free(sdi); | |
347 | } | |
348 | ||
349 | g_slist_free(dev_insts); | |
350 | dev_insts = NULL; | |
351 | ||
352 | if (usb_context) | |
353 | libusb_exit(usb_context); | |
354 | usb_context = NULL; | |
355 | ||
356 | return SR_OK; | |
357 | } | |
358 | ||
359 | static const void *hw_dev_info_get(int dev_index, int dev_info_id) | |
360 | { | |
361 | struct sr_dev_inst *sdi; | |
362 | struct context *ctx; | |
363 | const void *info; | |
364 | uint64_t tmp; | |
365 | ||
366 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
367 | return NULL; | |
368 | ctx = sdi->priv; | |
369 | ||
370 | info = NULL; | |
371 | switch (dev_info_id) { | |
372 | case SR_DI_INST: | |
373 | info = sdi; | |
374 | break; | |
375 | case SR_DI_NUM_PROBES: | |
376 | info = GINT_TO_POINTER(ctx->profile->num_probes); | |
377 | break; | |
378 | case SR_DI_PROBE_NAMES: | |
379 | info = probe_names; | |
380 | break; | |
381 | case SR_DI_BUFFERSIZES: | |
382 | info = buffersizes; | |
383 | break; | |
384 | case SR_DI_TIMEBASES: | |
385 | info = timebases; | |
386 | break; | |
387 | case SR_DI_TRIGGER_SOURCES: | |
388 | info = trigger_sources; | |
389 | break; | |
390 | case SR_DI_FILTERS: | |
391 | info = filter_targets; | |
392 | break; | |
393 | case SR_DI_VDIVS: | |
394 | info = vdivs; | |
395 | break; | |
396 | case SR_DI_COUPLING: | |
397 | info = coupling; | |
398 | break; | |
399 | /* TODO remove this */ | |
400 | case SR_DI_CUR_SAMPLERATE: | |
401 | info = &tmp; | |
402 | break; | |
403 | } | |
404 | ||
405 | return info; | |
406 | } | |
407 | ||
408 | static int hw_dev_status_get(int dev_index) | |
409 | { | |
410 | struct sr_dev_inst *sdi; | |
411 | ||
412 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
413 | return SR_ST_NOT_FOUND; | |
414 | ||
415 | return sdi->status; | |
416 | } | |
417 | ||
418 | static const int *hw_hwcap_get_all(void) | |
419 | { | |
420 | return hwcaps; | |
421 | } | |
422 | ||
423 | static int hw_dev_config_set(int dev_index, int hwcap, const void *value) | |
424 | { | |
425 | struct sr_dev_inst *sdi; | |
426 | struct context *ctx; | |
427 | struct sr_rational tmp_rat; | |
428 | float tmp_float; | |
429 | uint64_t tmp_u64; | |
430 | int ret, i; | |
431 | char **targets; | |
432 | ||
433 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
434 | return SR_ERR; | |
435 | ||
436 | if (sdi->status != SR_ST_ACTIVE) | |
437 | return SR_ERR; | |
438 | ||
439 | ret = SR_OK; | |
440 | ctx = sdi->priv; | |
441 | switch (hwcap) { | |
442 | case SR_HWCAP_LIMIT_FRAMES: | |
443 | ctx->limit_frames = *(const uint64_t *)value; | |
444 | break; | |
445 | case SR_HWCAP_PROBECONFIG: | |
446 | ret = configure_probes(ctx, (const GSList *)value); | |
447 | break; | |
448 | case SR_HWCAP_TRIGGER_SLOPE: | |
449 | tmp_u64 = *(const int *)value; | |
450 | if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE) | |
451 | ret = SR_ERR_ARG; | |
452 | ctx->triggerslope = tmp_u64; | |
453 | break; | |
454 | case SR_HWCAP_HORIZ_TRIGGERPOS: | |
455 | tmp_float = *(const float *)value; | |
456 | if (tmp_float < 0.0 || tmp_float > 1.0) { | |
457 | sr_err("hantek-dso: trigger position should be between 0.0 and 1.0"); | |
458 | ret = SR_ERR_ARG; | |
459 | } else | |
460 | ctx->triggerposition = tmp_float; | |
461 | break; | |
462 | case SR_HWCAP_BUFFERSIZE: | |
463 | tmp_u64 = *(const int *)value; | |
464 | for (i = 0; buffersizes[i]; i++) { | |
465 | if (buffersizes[i] == tmp_u64) { | |
466 | ctx->framesize = tmp_u64; | |
467 | break; | |
468 | } | |
469 | } | |
470 | if (buffersizes[i] == 0) | |
471 | ret = SR_ERR_ARG; | |
472 | break; | |
473 | case SR_HWCAP_TIMEBASE: | |
474 | tmp_rat = *(const struct sr_rational *)value; | |
475 | for (i = 0; timebases[i].p && timebases[i].q; i++) { | |
476 | if (timebases[i].p == tmp_rat.p | |
477 | && timebases[i].q == tmp_rat.q) { | |
478 | ctx->timebase = i; | |
479 | break; | |
480 | } | |
481 | } | |
482 | if (timebases[i].p == 0 && timebases[i].q == 0) | |
483 | ret = SR_ERR_ARG; | |
484 | break; | |
485 | case SR_HWCAP_TRIGGER_SOURCE: | |
486 | for (i = 0; trigger_sources[i]; i++) { | |
487 | if (!strcmp(value, trigger_sources[i])) { | |
488 | ctx->triggersource = g_strdup(value); | |
489 | break; | |
490 | } | |
491 | } | |
492 | if (trigger_sources[i] == 0) | |
493 | ret = SR_ERR_ARG; | |
494 | break; | |
495 | case SR_HWCAP_FILTER: | |
496 | ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0; | |
497 | targets = g_strsplit(value, ",", 0); | |
498 | for (i = 0; targets[i]; i++) { | |
499 | if (targets[i] == '\0') | |
500 | /* Empty filter string can be used to clear them all. */ | |
501 | ; | |
502 | else if (!strcmp(targets[i], "CH1")) | |
503 | ctx->filter_ch1 = TRUE; | |
504 | else if (!strcmp(targets[i], "CH2")) | |
505 | ctx->filter_ch2 = TRUE; | |
506 | else if (!strcmp(targets[i], "TRIGGER")) | |
507 | ctx->filter_trigger = TRUE; | |
508 | else { | |
509 | sr_err("invalid filter target %s", targets[i]); | |
510 | ret = SR_ERR_ARG; | |
511 | } | |
512 | } | |
513 | g_strfreev(targets); | |
514 | break; | |
515 | case SR_HWCAP_VDIV: | |
516 | /* TODO not supporting vdiv per channel yet */ | |
517 | tmp_rat = *(const struct sr_rational *)value; | |
518 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
519 | if (vdivs[i].p == tmp_rat.p | |
520 | && vdivs[i].q == tmp_rat.q) { | |
521 | ctx->voltage_ch1 = i; | |
522 | ctx->voltage_ch2 = i; | |
523 | break; | |
524 | } | |
525 | } | |
526 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
527 | ret = SR_ERR_ARG; | |
528 | break; | |
529 | case SR_HWCAP_COUPLING: | |
530 | /* TODO not supporting coupling per channel yet */ | |
531 | for (i = 0; coupling[i]; i++) { | |
532 | if (!strcmp(value, coupling[i])) { | |
533 | ctx->coupling_ch1 = i; | |
534 | ctx->coupling_ch2 = i; | |
535 | break; | |
536 | } | |
537 | } | |
538 | if (coupling[i] == 0) | |
539 | ret = SR_ERR_ARG; | |
540 | break; | |
541 | default: | |
542 | ret = SR_ERR_ARG; | |
543 | } | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
548 | /* Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
549 | * Only channel data comes in asynchronously, and all transfers for this are | |
550 | * queued up beforehand, so this just needs so chuck the incoming data onto | |
551 | * the libsigrok session bus. | |
552 | */ | |
553 | static void receive_transfer(struct libusb_transfer *transfer) | |
554 | { | |
555 | struct sr_datafeed_packet packet; | |
556 | struct sr_datafeed_analog analog; | |
557 | struct context *ctx; | |
558 | float ch1, ch2; | |
559 | int num_probes, data_offset, i; | |
560 | ||
561 | ctx = transfer->user_data; | |
562 | sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes", | |
563 | transfer->status, transfer->actual_length); | |
564 | ||
565 | if (transfer->actual_length == 0) | |
566 | /* Nothing to send to the bus. */ | |
567 | return; | |
568 | ||
569 | ctx->current_transfer += transfer->actual_length; | |
570 | sr_dbg("hantek-dso: got %d of %d in frame", ctx->current_transfer, ctx->framesize * 2); | |
571 | ||
572 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; | |
573 | packet.type = SR_DF_ANALOG; | |
574 | packet.payload = &analog; | |
575 | /* TODO: support for 5xxx series 9-bit samples */ | |
576 | analog.num_samples = transfer->actual_length / 2; | |
577 | analog.unit = SR_UNIT_VOLTAGE; | |
578 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
579 | data_offset = 0; | |
580 | for (i = 0; i < analog.num_samples; i++) { | |
581 | /* The device always sends data for both channels. If a channel | |
582 | * is disabled, it contains a copy of the enabled channel's | |
583 | * data. However, we only send the requested channels to the bus. | |
584 | */ | |
585 | /* TODO: support for 5xxx series 9-bit samples */ | |
586 | if (ctx->ch1_enabled) { | |
587 | ch1 = (*(transfer->buffer + i * 2 + 1) / 255.0); | |
588 | analog.data[data_offset++] = ch1; | |
589 | } | |
590 | if (ctx->ch2_enabled) { | |
591 | ch2 = (*(transfer->buffer + i * 2) / 255.0); | |
592 | analog.data[data_offset++] = ch2; | |
593 | } | |
594 | } | |
595 | g_free(transfer->buffer); | |
596 | libusb_free_transfer(transfer); | |
597 | sr_session_send(ctx->cb_data, &packet); | |
598 | ||
599 | if (ctx->current_transfer >= ctx->framesize * 2) { | |
600 | /* That's the last chunk in this frame. */ | |
601 | packet.type = SR_DF_FRAME_END; | |
602 | sr_session_send(ctx->cb_data, &packet); | |
603 | ||
604 | if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) { | |
605 | /* Terminate session */ | |
606 | /* TODO: don't leave pending USB transfers hanging */ | |
607 | packet.type = SR_DF_END; | |
608 | sr_session_send(ctx->cb_data, &packet); | |
609 | } else { | |
610 | ctx->current_transfer = 0; | |
611 | ctx->dev_state = NEW_CAPTURE; | |
612 | } | |
613 | } | |
614 | ||
615 | } | |
616 | ||
617 | static int handle_event(int fd, int revents, void *cb_data) | |
618 | { | |
619 | struct sr_datafeed_packet packet; | |
620 | struct timeval tv; | |
621 | struct context *ctx; | |
622 | int capturestate; | |
623 | ||
624 | /* Avoid compiler warnings. */ | |
625 | (void)fd; | |
626 | (void)revents; | |
627 | ||
628 | /* Always handle pending libusb events. */ | |
629 | tv.tv_sec = tv.tv_usec = 0; | |
630 | libusb_handle_events_timeout(usb_context, &tv); | |
631 | ||
632 | ctx = cb_data; | |
633 | /* TODO: ugh */ | |
634 | if (ctx->dev_state == NEW_CAPTURE) { | |
635 | if (dso_capture_start(ctx) != SR_OK) | |
636 | return TRUE; | |
637 | if (dso_enable_trigger(ctx) != SR_OK) | |
638 | return TRUE; | |
639 | // if (dso_force_trigger(ctx) != SR_OK) | |
640 | // return TRUE; | |
641 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
642 | ctx->dev_state = CAPTURE; | |
643 | return TRUE; | |
644 | } | |
645 | if (ctx->dev_state != CAPTURE) | |
646 | return TRUE; | |
647 | ||
648 | if ((capturestate = dso_get_capturestate(ctx)) == CAPTURE_UNKNOWN) { | |
649 | /* Generated by the function, not the hardware. */ | |
650 | return TRUE; | |
651 | } | |
652 | ||
653 | sr_dbg("hantek-dso: capturestate %d", capturestate); | |
654 | switch (capturestate) { | |
655 | case CAPTURE_EMPTY: | |
656 | if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
657 | ctx->capture_empty_count = 0; | |
658 | if (dso_capture_start(ctx) != SR_OK) | |
659 | break; | |
660 | if (dso_enable_trigger(ctx) != SR_OK) | |
661 | break; | |
662 | // if (dso_force_trigger(ctx) != SR_OK) | |
663 | // break; | |
664 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
665 | } | |
666 | break; | |
667 | case CAPTURE_FILLING: | |
668 | /* no data yet */ | |
669 | break; | |
670 | case CAPTURE_READY_8BIT: | |
671 | /* Tell the scope to send us the first frame. */ | |
672 | if (dso_get_channeldata(ctx, receive_transfer) != SR_OK) | |
673 | break; | |
674 | ||
675 | /* Don't hit the state machine again until we're done fetching | |
676 | * the data we just told the scope to send. | |
677 | */ | |
678 | ctx->dev_state = FETCH_DATA; | |
679 | ||
680 | /* Tell the frontend a new frame is on the way. */ | |
681 | packet.type = SR_DF_FRAME_BEGIN; | |
682 | sr_session_send(cb_data, &packet); | |
683 | break; | |
684 | case CAPTURE_READY_9BIT: | |
685 | /* TODO */ | |
686 | sr_err("not yet supported"); | |
687 | break; | |
688 | case CAPTURE_TIMEOUT: | |
689 | /* Doesn't matter, we'll try again next time. */ | |
690 | break; | |
691 | default: | |
692 | sr_dbg("unknown capture state"); | |
693 | } | |
694 | ||
695 | return TRUE; | |
696 | } | |
697 | ||
698 | static int hw_dev_acquisition_start(int dev_index, void *cb_data) | |
699 | { | |
700 | const struct libusb_pollfd **lupfd; | |
701 | struct sr_datafeed_packet packet; | |
702 | struct sr_datafeed_header header; | |
703 | struct sr_datafeed_meta_analog meta; | |
704 | struct sr_dev_inst *sdi; | |
705 | struct context *ctx; | |
706 | int i; | |
707 | ||
708 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
709 | return SR_ERR; | |
710 | ||
711 | if (sdi->status != SR_ST_ACTIVE) | |
712 | return SR_ERR; | |
713 | ||
714 | ctx = sdi->priv; | |
715 | ctx->cb_data = cb_data; | |
716 | ||
717 | if (dso_init(ctx) != SR_OK) | |
718 | return SR_ERR; | |
719 | ||
720 | if (dso_capture_start(ctx) != SR_OK) | |
721 | return SR_ERR; | |
722 | ||
723 | ctx->dev_state = CAPTURE; | |
724 | lupfd = libusb_get_pollfds(usb_context); | |
725 | for (i = 0; lupfd[i]; i++) | |
726 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event, | |
727 | ctx); | |
728 | free(lupfd); | |
729 | ||
730 | /* Send header packet to the session bus. */ | |
731 | packet.type = SR_DF_HEADER; | |
732 | packet.payload = (unsigned char *)&header; | |
733 | header.feed_version = 1; | |
734 | gettimeofday(&header.starttime, NULL); | |
735 | sr_session_send(cb_data, &packet); | |
736 | ||
737 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
738 | packet.type = SR_DF_META_ANALOG; | |
739 | packet.payload = &meta; | |
740 | meta.num_probes = ctx->profile->num_probes; | |
741 | sr_session_send(cb_data, &packet); | |
742 | ||
743 | return SR_OK; | |
744 | } | |
745 | ||
746 | /* TODO: doesn't really cancel pending transfers so they might come in after | |
747 | * SR_DF_END is sent. | |
748 | */ | |
749 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data) | |
750 | { | |
751 | struct sr_datafeed_packet packet; | |
752 | struct sr_dev_inst *sdi; | |
753 | struct context *ctx; | |
754 | ||
755 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
756 | return SR_ERR; | |
757 | ||
758 | if (sdi->status != SR_ST_ACTIVE) | |
759 | return SR_ERR; | |
760 | ||
761 | ctx = sdi->priv; | |
762 | ctx->dev_state = IDLE; | |
763 | ||
764 | packet.type = SR_DF_END; | |
765 | sr_session_send(cb_data, &packet); | |
766 | ||
767 | return SR_OK; | |
768 | } | |
769 | ||
770 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info = { | |
771 | .name = "hantek-dso", | |
772 | .longname = "Hantek DSO", | |
773 | .api_version = 1, | |
774 | .init = hw_init, | |
775 | .cleanup = hw_cleanup, | |
776 | .dev_open = hw_dev_open, | |
777 | .dev_close = hw_dev_close, | |
778 | .dev_info_get = hw_dev_info_get, | |
779 | .dev_status_get = hw_dev_status_get, | |
780 | .hwcap_get_all = hw_hwcap_get_all, | |
781 | .dev_config_set = hw_dev_config_set, | |
782 | .dev_acquisition_start = hw_dev_acquisition_start, | |
783 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
784 | }; |