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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 <glib.h> | |
31 | #include <libusb.h> | |
32 | #include "sigrok.h" | |
33 | #include "sigrok-internal.h" | |
34 | #include "config.h" | |
35 | #include "dso.h" | |
36 | ||
37 | /* FIXME: Temporary build fix, this will be removed later. */ | |
38 | #define GTV_TO_MSEC(gtv) (gtv.tv_sec * 1000 + gtv.tv_usec / 1000) | |
39 | ||
40 | /* Max time in ms before we want to check on events */ | |
41 | #define TICK 1 | |
42 | ||
43 | static const int hwcaps[] = { | |
44 | SR_HWCAP_OSCILLOSCOPE, | |
45 | SR_HWCAP_LIMIT_SAMPLES, | |
46 | SR_HWCAP_CONTINUOUS, | |
47 | SR_HWCAP_TIMEBASE, | |
48 | SR_HWCAP_BUFFERSIZE, | |
49 | SR_HWCAP_TRIGGER_SOURCE, | |
50 | SR_HWCAP_TRIGGER_SLOPE, | |
51 | SR_HWCAP_HORIZ_TRIGGERPOS, | |
52 | SR_HWCAP_FILTER, | |
53 | SR_HWCAP_VDIV, | |
54 | SR_HWCAP_COUPLING, | |
55 | 0, | |
56 | }; | |
57 | ||
58 | static const char *probe_names[] = { | |
59 | "CH1", | |
60 | "CH2", | |
61 | NULL, | |
62 | }; | |
63 | ||
64 | static const struct dso_profile dev_profiles[] = { | |
65 | { 0x04b4, 0x2090, | |
66 | 0x04b5, 0x2090, | |
67 | "Hantek", "DSO-2090", | |
68 | NULL, 2, | |
69 | FIRMWARE_DIR "/hantek-dso-2090.fw" }, | |
70 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
71 | }; | |
72 | ||
73 | static const uint64_t buffersizes[] = { | |
74 | 10240, | |
75 | 32768, | |
76 | /* TODO: 65535 */ | |
77 | 0, | |
78 | }; | |
79 | ||
80 | static const struct sr_rational timebases[] = { | |
81 | /* microseconds */ | |
82 | { 10, 1000000 }, | |
83 | { 20, 1000000 }, | |
84 | { 40, 1000000 }, | |
85 | { 100, 1000000 }, | |
86 | { 200, 1000000 }, | |
87 | { 400, 1000000 }, | |
88 | /* milliseconds */ | |
89 | { 1, 1000 }, | |
90 | { 2, 1000 }, | |
91 | { 4, 1000 }, | |
92 | { 10, 1000 }, | |
93 | { 20, 1000 }, | |
94 | { 40, 1000 }, | |
95 | { 100, 1000 }, | |
96 | { 200, 1000 }, | |
97 | { 400, 1000 }, | |
98 | { 0, 0}, | |
99 | }; | |
100 | ||
101 | static const struct sr_rational vdivs[] = { | |
102 | /* millivolts */ | |
103 | { 10, 1000 }, | |
104 | { 20, 1000 }, | |
105 | { 50, 1000 }, | |
106 | { 100, 1000 }, | |
107 | { 200, 1000 }, | |
108 | { 500, 1000 }, | |
109 | /* volts */ | |
110 | { 1, 1 }, | |
111 | { 2, 1 }, | |
112 | { 5, 1 }, | |
113 | { 0, 0 }, | |
114 | }; | |
115 | ||
116 | static const char *trigger_sources[] = { | |
117 | "CH1", | |
118 | "CH2", | |
119 | "EXT", | |
120 | NULL, | |
121 | }; | |
122 | ||
123 | static const char *filter_targets[] = { | |
124 | "CH1", | |
125 | "CH2", | |
126 | /* TODO: "TRIGGER", */ | |
127 | NULL, | |
128 | }; | |
129 | ||
130 | static const char *coupling[] = { | |
131 | "AC", | |
132 | "DC", | |
133 | "GND", | |
134 | NULL, | |
135 | }; | |
136 | ||
137 | SR_PRIV libusb_context *usb_context = NULL; | |
138 | SR_PRIV GSList *dev_insts = NULL; | |
139 | ||
140 | static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof) | |
141 | { | |
142 | struct sr_dev_inst *sdi; | |
143 | struct context *ctx; | |
144 | ||
145 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
146 | prof->vendor, prof->model, prof->model_version); | |
147 | if (!sdi) | |
148 | return NULL; | |
149 | ||
150 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
151 | sr_err("hantek-dso: ctx malloc failed"); | |
152 | return NULL; | |
153 | } | |
154 | ctx->profile = prof; | |
155 | ctx->dev_state = IDLE; | |
156 | ctx->timebase = DEFAULT_TIMEBASE; | |
157 | ctx->ch1_enabled = TRUE; | |
158 | ctx->ch2_enabled = TRUE; | |
159 | ctx->voltage_ch1 = DEFAULT_VOLTAGE; | |
160 | ctx->voltage_ch2 = DEFAULT_VOLTAGE; | |
161 | ctx->coupling_ch1 = DEFAULT_COUPLING; | |
162 | ctx->coupling_ch2 = DEFAULT_COUPLING; | |
163 | ctx->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
164 | ctx->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
165 | ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
166 | ctx->framesize = DEFAULT_FRAMESIZE; | |
167 | ctx->triggerslope = SLOPE_POSITIVE; | |
168 | ctx->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE); | |
169 | ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
170 | sdi->priv = ctx; | |
171 | dev_insts = g_slist_append(dev_insts, sdi); | |
172 | ||
173 | return sdi; | |
174 | } | |
175 | ||
176 | static int configure_probes(struct context *ctx, const GSList *probes) | |
177 | { | |
178 | const struct sr_probe *probe; | |
179 | const GSList *l; | |
180 | ||
181 | ctx->ch1_enabled = ctx->ch2_enabled = FALSE; | |
182 | for (l = probes; l; l = l->next) { | |
183 | probe = (struct sr_probe *)l->data; | |
184 | if (probe->index == 1) | |
185 | ctx->ch1_enabled = probe->enabled; | |
186 | else if (probe->index == 2) | |
187 | ctx->ch2_enabled = probe->enabled; | |
188 | } | |
189 | ||
190 | return SR_OK; | |
191 | } | |
192 | ||
193 | static int hw_init(const char *devinfo) | |
194 | { | |
195 | struct sr_dev_inst *sdi; | |
196 | struct libusb_device_descriptor des; | |
197 | const struct dso_profile *prof; | |
198 | struct context *ctx; | |
199 | libusb_device **devlist; | |
200 | int err, devcnt, i, j; | |
201 | ||
202 | /* Avoid compiler warnings. */ | |
203 | (void)devinfo; | |
204 | ||
205 | if (libusb_init(&usb_context) != 0) { | |
206 | sr_err("hantek-dso: Failed to initialize USB."); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | /* Find all Hantek DSO devices and upload firmware to all of them. */ | |
211 | devcnt = 0; | |
212 | libusb_get_device_list(usb_context, &devlist); | |
213 | for (i = 0; devlist[i]; i++) { | |
214 | if ((err = libusb_get_device_descriptor(devlist[i], &des))) { | |
215 | sr_err("hantek-dso: failed to get device descriptor: %d", err); | |
216 | continue; | |
217 | } | |
218 | ||
219 | prof = NULL; | |
220 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
221 | if (des.idVendor == dev_profiles[j].orig_vid | |
222 | && des.idProduct == dev_profiles[j].orig_pid) { | |
223 | /* Device matches the pre-firmware profile. */ | |
224 | prof = &dev_profiles[j]; | |
225 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
226 | sdi = dso_dev_new(devcnt, prof); | |
227 | ctx = sdi->priv; | |
228 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
229 | prof->firmware) == SR_OK) | |
230 | /* Remember when the firmware on this device was updated */ | |
231 | g_get_current_time(&ctx->fw_updated); | |
232 | else | |
233 | sr_err("hantek-dso: firmware upload failed for " | |
234 | "device %d", devcnt); | |
235 | /* Dummy USB address of 0xff will get overwritten later. */ | |
236 | ctx->usb = sr_usb_dev_inst_new( | |
237 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
238 | devcnt++; | |
239 | break; | |
240 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
241 | && des.idProduct == dev_profiles[j].fw_pid) { | |
242 | /* Device matches the post-firmware profile. */ | |
243 | prof = &dev_profiles[j]; | |
244 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
245 | sdi = dso_dev_new(devcnt, prof); | |
246 | sdi->status = SR_ST_INACTIVE; | |
247 | ctx = sdi->priv; | |
248 | ctx->usb = sr_usb_dev_inst_new( | |
249 | libusb_get_bus_number(devlist[i]), | |
250 | libusb_get_device_address(devlist[i]), NULL); | |
251 | devcnt++; | |
252 | break; | |
253 | } | |
254 | } | |
255 | if (!prof) | |
256 | /* not a supported VID/PID */ | |
257 | continue; | |
258 | } | |
259 | libusb_free_device_list(devlist, 1); | |
260 | ||
261 | return devcnt; | |
262 | } | |
263 | ||
264 | static int hw_dev_open(int dev_index) | |
265 | { | |
266 | GTimeVal cur_time; | |
267 | struct sr_dev_inst *sdi; | |
268 | struct context *ctx; | |
269 | int timediff, err; | |
270 | ||
271 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
272 | return SR_ERR_ARG; | |
273 | ctx = sdi->priv; | |
274 | ||
275 | /* | |
276 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms | |
277 | * for the FX2 to renumerate | |
278 | */ | |
279 | err = 0; | |
280 | if (GTV_TO_MSEC(ctx->fw_updated) > 0) { | |
281 | sr_info("hantek-dso: waiting for device to reset"); | |
282 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
283 | g_usleep(300 * 1000); | |
284 | timediff = 0; | |
285 | while (timediff < MAX_RENUM_DELAY) { | |
286 | if ((err = dso_open(dev_index)) == SR_OK) | |
287 | break; | |
288 | g_usleep(100 * 1000); | |
289 | g_get_current_time(&cur_time); | |
290 | timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(ctx->fw_updated); | |
291 | } | |
292 | sr_info("hantek-dso: device came back after %d ms", timediff); | |
293 | } else { | |
294 | err = dso_open(dev_index); | |
295 | } | |
296 | ||
297 | if (err != SR_OK) { | |
298 | sr_err("hantek-dso: unable to open device"); | |
299 | return SR_ERR; | |
300 | } | |
301 | ||
302 | err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
303 | if (err != 0) { | |
304 | sr_err("hantek-dso: Unable to claim interface: %d", err); | |
305 | return SR_ERR; | |
306 | } | |
307 | ||
308 | return SR_OK; | |
309 | } | |
310 | ||
311 | static int hw_dev_close(int dev_index) | |
312 | { | |
313 | struct sr_dev_inst *sdi; | |
314 | ||
315 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
316 | return SR_ERR_ARG; | |
317 | ||
318 | dso_close(sdi); | |
319 | ||
320 | return SR_OK; | |
321 | } | |
322 | ||
323 | static int hw_cleanup(void) | |
324 | { | |
325 | GSList *l; | |
326 | struct sr_dev_inst *sdi; | |
327 | struct context *ctx; | |
328 | ||
329 | /* Properly close and free all devices. */ | |
330 | for (l = dev_insts; l; l = l->next) { | |
331 | if (!(sdi = l->data)) { | |
332 | /* Log error, but continue cleaning up the rest. */ | |
333 | sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__); | |
334 | continue; | |
335 | } | |
336 | if (!(ctx = sdi->priv)) { | |
337 | /* Log error, but continue cleaning up the rest. */ | |
338 | sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__); | |
339 | continue; | |
340 | } | |
341 | dso_close(sdi); | |
342 | sr_usb_dev_inst_free(ctx->usb); | |
343 | g_free(ctx->triggersource); | |
344 | ||
345 | sr_dev_inst_free(sdi); | |
346 | } | |
347 | ||
348 | g_slist_free(dev_insts); | |
349 | dev_insts = NULL; | |
350 | ||
351 | if (usb_context) | |
352 | libusb_exit(usb_context); | |
353 | usb_context = NULL; | |
354 | ||
355 | return SR_OK; | |
356 | } | |
357 | ||
358 | static const void *hw_dev_info_get(int dev_index, int dev_info_id) | |
359 | { | |
360 | struct sr_dev_inst *sdi; | |
361 | struct context *ctx; | |
362 | const void *info; | |
363 | uint64_t tmp; | |
364 | ||
365 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
366 | return NULL; | |
367 | ctx = sdi->priv; | |
368 | ||
369 | info = NULL; | |
370 | switch (dev_info_id) { | |
371 | case SR_DI_INST: | |
372 | info = sdi; | |
373 | break; | |
374 | case SR_DI_NUM_PROBES: | |
375 | info = GINT_TO_POINTER(ctx->profile->num_probes); | |
376 | break; | |
377 | case SR_DI_PROBE_NAMES: | |
378 | info = probe_names; | |
379 | break; | |
380 | case SR_DI_BUFFERSIZES: | |
381 | info = buffersizes; | |
382 | break; | |
383 | case SR_DI_TIMEBASES: | |
384 | info = timebases; | |
385 | break; | |
386 | case SR_DI_TRIGGER_SOURCES: | |
387 | info = trigger_sources; | |
388 | break; | |
389 | case SR_DI_FILTERS: | |
390 | info = filter_targets; | |
391 | break; | |
392 | case SR_DI_VDIVS: | |
393 | info = vdivs; | |
394 | break; | |
395 | case SR_DI_COUPLING: | |
396 | info = coupling; | |
397 | break; | |
398 | /* TODO remove this */ | |
399 | case SR_DI_CUR_SAMPLERATE: | |
400 | info = &tmp; | |
401 | break; | |
402 | } | |
403 | ||
404 | return info; | |
405 | } | |
406 | ||
407 | static int hw_dev_status_get(int dev_index) | |
408 | { | |
409 | struct sr_dev_inst *sdi; | |
410 | ||
411 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
412 | return SR_ST_NOT_FOUND; | |
413 | ||
414 | return sdi->status; | |
415 | } | |
416 | ||
417 | static const int *hw_hwcap_get_all(void) | |
418 | { | |
419 | return hwcaps; | |
420 | } | |
421 | ||
422 | static int hw_dev_config_set(int dev_index, int hwcap, const void *value) | |
423 | { | |
424 | struct sr_dev_inst *sdi; | |
425 | struct context *ctx; | |
426 | struct sr_rational tmp_rat; | |
427 | float tmp_float; | |
428 | uint64_t tmp_u64; | |
429 | int ret, i; | |
430 | char **targets; | |
431 | ||
432 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
433 | return SR_ERR; | |
434 | ||
435 | if (sdi->status != SR_ST_ACTIVE) | |
436 | return SR_ERR; | |
437 | ||
438 | ret = SR_OK; | |
439 | ctx = sdi->priv; | |
440 | switch (hwcap) { | |
441 | case SR_HWCAP_LIMIT_FRAMES: | |
442 | ctx->limit_frames = *(const uint64_t *)value; | |
443 | break; | |
444 | case SR_HWCAP_PROBECONFIG: | |
445 | ret = configure_probes(ctx, (const GSList *)value); | |
446 | break; | |
447 | case SR_HWCAP_TRIGGER_SLOPE: | |
448 | tmp_u64 = *(const int *)value; | |
449 | if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE) | |
450 | ret = SR_ERR_ARG; | |
451 | ctx->triggerslope = tmp_u64; | |
452 | break; | |
453 | case SR_HWCAP_HORIZ_TRIGGERPOS: | |
454 | tmp_float = *(const float *)value; | |
455 | if (tmp_float < 0.0 || tmp_float > 1.0) { | |
456 | sr_err("hantek-dso: trigger position should be between 0.0 and 1.0"); | |
457 | ret = SR_ERR_ARG; | |
458 | } else | |
459 | ctx->triggerposition = tmp_float; | |
460 | break; | |
461 | case SR_HWCAP_BUFFERSIZE: | |
462 | tmp_u64 = *(const int *)value; | |
463 | for (i = 0; buffersizes[i]; i++) { | |
464 | if (buffersizes[i] == tmp_u64) { | |
465 | ctx->framesize = tmp_u64; | |
466 | break; | |
467 | } | |
468 | } | |
469 | if (buffersizes[i] == 0) | |
470 | ret = SR_ERR_ARG; | |
471 | break; | |
472 | case SR_HWCAP_TIMEBASE: | |
473 | tmp_rat = *(const struct sr_rational *)value; | |
474 | for (i = 0; timebases[i].p && timebases[i].q; i++) { | |
475 | if (timebases[i].p == tmp_rat.p | |
476 | && timebases[i].q == tmp_rat.q) { | |
477 | ctx->timebase = i; | |
478 | break; | |
479 | } | |
480 | } | |
481 | if (timebases[i].p == 0 && timebases[i].q == 0) | |
482 | ret = SR_ERR_ARG; | |
483 | break; | |
484 | case SR_HWCAP_TRIGGER_SOURCE: | |
485 | for (i = 0; trigger_sources[i]; i++) { | |
486 | if (!strcmp(value, trigger_sources[i])) { | |
487 | ctx->triggersource = g_strdup(value); | |
488 | break; | |
489 | } | |
490 | } | |
491 | if (trigger_sources[i] == 0) | |
492 | ret = SR_ERR_ARG; | |
493 | break; | |
494 | case SR_HWCAP_FILTER: | |
495 | ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0; | |
496 | targets = g_strsplit(value, ",", 0); | |
497 | for (i = 0; targets[i]; i++) { | |
498 | if (targets[i] == '\0') | |
499 | /* Empty filter string can be used to clear them all. */ | |
500 | ; | |
501 | else if (!strcmp(targets[i], "CH1")) | |
502 | ctx->filter_ch1 = TRUE; | |
503 | else if (!strcmp(targets[i], "CH2")) | |
504 | ctx->filter_ch2 = TRUE; | |
505 | else if (!strcmp(targets[i], "TRIGGER")) | |
506 | ctx->filter_trigger = TRUE; | |
507 | else { | |
508 | sr_err("invalid filter target %s", targets[i]); | |
509 | ret = SR_ERR_ARG; | |
510 | } | |
511 | } | |
512 | g_strfreev(targets); | |
513 | break; | |
514 | case SR_HWCAP_VDIV: | |
515 | /* TODO not supporting vdiv per channel yet */ | |
516 | tmp_rat = *(const struct sr_rational *)value; | |
517 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
518 | if (vdivs[i].p == tmp_rat.p | |
519 | && vdivs[i].q == tmp_rat.q) { | |
520 | ctx->voltage_ch1 = i; | |
521 | ctx->voltage_ch2 = i; | |
522 | break; | |
523 | } | |
524 | } | |
525 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
526 | ret = SR_ERR_ARG; | |
527 | break; | |
528 | case SR_HWCAP_COUPLING: | |
529 | /* TODO not supporting coupling per channel yet */ | |
530 | for (i = 0; coupling[i]; i++) { | |
531 | if (!strcmp(value, coupling[i])) { | |
532 | ctx->coupling_ch1 = i; | |
533 | ctx->coupling_ch2 = i; | |
534 | break; | |
535 | } | |
536 | } | |
537 | if (coupling[i] == 0) | |
538 | ret = SR_ERR_ARG; | |
539 | break; | |
540 | default: | |
541 | ret = SR_ERR_ARG; | |
542 | } | |
543 | ||
544 | return ret; | |
545 | } | |
546 | ||
547 | /* Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
548 | * Only channel data comes in asynchronously, and all transfers for this are | |
549 | * queued up beforehand, so this just needs so chuck the incoming data onto | |
550 | * the libsigrok session bus. | |
551 | */ | |
552 | static void receive_transfer(struct libusb_transfer *transfer) | |
553 | { | |
554 | struct sr_datafeed_packet packet; | |
555 | struct sr_datafeed_analog analog; | |
556 | struct context *ctx; | |
557 | float ch1, ch2, range; | |
558 | int num_probes, data_offset, i; | |
559 | ||
560 | ctx = transfer->user_data; | |
561 | sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes", | |
562 | transfer->status, transfer->actual_length); | |
563 | ||
564 | if (transfer->actual_length == 0) | |
565 | /* Nothing to send to the bus. */ | |
566 | return; | |
567 | ||
568 | ctx->current_transfer += transfer->actual_length; | |
569 | sr_dbg("hantek-dso: got %d of %d in frame", ctx->current_transfer, ctx->framesize * 2); | |
570 | ||
571 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; | |
572 | packet.type = SR_DF_ANALOG; | |
573 | packet.payload = &analog; | |
574 | /* TODO: support for 5xxx series 9-bit samples */ | |
575 | analog.num_samples = transfer->actual_length / 2; | |
576 | analog.unit = SR_UNIT_VOLTAGE; | |
577 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
578 | data_offset = 0; | |
579 | for (i = 0; i < analog.num_samples; i++) { | |
580 | /* The device always sends data for both channels. If a channel | |
581 | * is disabled, it contains a copy of the enabled channel's | |
582 | * data. However, we only send the requested channels to the bus. | |
583 | * | |
584 | * Voltage values are encoded as a value 0-255 (0-512 on the 5200*), | |
585 | * where the value is a point in the range represented by the vdiv | |
586 | * setting. There are 8 vertical divs, so e.g. 500mV/div represents | |
587 | * 4V peak-to-peak where 0 = -2V and 255 = +2V. | |
588 | */ | |
589 | /* TODO: support for 5xxx series 9-bit samples */ | |
590 | if (ctx->ch1_enabled) { | |
591 | range = ((float)vdivs[ctx->voltage_ch1].p / vdivs[ctx->voltage_ch1].q) * 8; | |
592 | ch1 = range / 255 * *(transfer->buffer + i * 2 + 1); | |
593 | /* Value is centered around 0V. */ | |
594 | ch1 -= range / 2; | |
595 | analog.data[data_offset++] = ch1; | |
596 | } | |
597 | if (ctx->ch2_enabled) { | |
598 | range = ((float)vdivs[ctx->voltage_ch2].p / vdivs[ctx->voltage_ch2].q) * 8; | |
599 | ch2 = range / 255 * *(transfer->buffer + i * 2); | |
600 | ch2 -= range / 2; | |
601 | analog.data[data_offset++] = ch2; | |
602 | } | |
603 | } | |
604 | g_free(transfer->buffer); | |
605 | libusb_free_transfer(transfer); | |
606 | sr_session_send(ctx->cb_data, &packet); | |
607 | ||
608 | if (ctx->current_transfer >= ctx->framesize * 2) { | |
609 | /* That's the last chunk in this frame. */ | |
610 | packet.type = SR_DF_FRAME_END; | |
611 | sr_session_send(ctx->cb_data, &packet); | |
612 | ||
613 | if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) { | |
614 | /* Terminate session */ | |
615 | /* TODO: don't leave pending USB transfers hanging */ | |
616 | packet.type = SR_DF_END; | |
617 | sr_session_send(ctx->cb_data, &packet); | |
618 | } else { | |
619 | ctx->current_transfer = 0; | |
620 | ctx->dev_state = NEW_CAPTURE; | |
621 | } | |
622 | } | |
623 | ||
624 | } | |
625 | ||
626 | static int handle_event(int fd, int revents, void *cb_data) | |
627 | { | |
628 | struct sr_datafeed_packet packet; | |
629 | struct timeval tv; | |
630 | struct context *ctx; | |
631 | int capturestate; | |
632 | ||
633 | /* Avoid compiler warnings. */ | |
634 | (void)fd; | |
635 | (void)revents; | |
636 | ||
637 | /* Always handle pending libusb events. */ | |
638 | tv.tv_sec = tv.tv_usec = 0; | |
639 | libusb_handle_events_timeout(usb_context, &tv); | |
640 | ||
641 | ctx = cb_data; | |
642 | /* TODO: ugh */ | |
643 | if (ctx->dev_state == NEW_CAPTURE) { | |
644 | if (dso_capture_start(ctx) != SR_OK) | |
645 | return TRUE; | |
646 | if (dso_enable_trigger(ctx) != SR_OK) | |
647 | return TRUE; | |
648 | // if (dso_force_trigger(ctx) != SR_OK) | |
649 | // return TRUE; | |
650 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
651 | ctx->dev_state = CAPTURE; | |
652 | return TRUE; | |
653 | } | |
654 | if (ctx->dev_state != CAPTURE) | |
655 | return TRUE; | |
656 | ||
657 | if ((capturestate = dso_get_capturestate(ctx)) == CAPTURE_UNKNOWN) { | |
658 | /* Generated by the function, not the hardware. */ | |
659 | return TRUE; | |
660 | } | |
661 | ||
662 | sr_dbg("hantek-dso: capturestate %d", capturestate); | |
663 | switch (capturestate) { | |
664 | case CAPTURE_EMPTY: | |
665 | if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
666 | ctx->capture_empty_count = 0; | |
667 | if (dso_capture_start(ctx) != SR_OK) | |
668 | break; | |
669 | if (dso_enable_trigger(ctx) != SR_OK) | |
670 | break; | |
671 | // if (dso_force_trigger(ctx) != SR_OK) | |
672 | // break; | |
673 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
674 | } | |
675 | break; | |
676 | case CAPTURE_FILLING: | |
677 | /* no data yet */ | |
678 | break; | |
679 | case CAPTURE_READY_8BIT: | |
680 | /* Tell the scope to send us the first frame. */ | |
681 | if (dso_get_channeldata(ctx, receive_transfer) != SR_OK) | |
682 | break; | |
683 | ||
684 | /* Don't hit the state machine again until we're done fetching | |
685 | * the data we just told the scope to send. | |
686 | */ | |
687 | ctx->dev_state = FETCH_DATA; | |
688 | ||
689 | /* Tell the frontend a new frame is on the way. */ | |
690 | packet.type = SR_DF_FRAME_BEGIN; | |
691 | sr_session_send(cb_data, &packet); | |
692 | break; | |
693 | case CAPTURE_READY_9BIT: | |
694 | /* TODO */ | |
695 | sr_err("not yet supported"); | |
696 | break; | |
697 | case CAPTURE_TIMEOUT: | |
698 | /* Doesn't matter, we'll try again next time. */ | |
699 | break; | |
700 | default: | |
701 | sr_dbg("unknown capture state"); | |
702 | } | |
703 | ||
704 | return TRUE; | |
705 | } | |
706 | ||
707 | static int hw_dev_acquisition_start(int dev_index, void *cb_data) | |
708 | { | |
709 | const struct libusb_pollfd **lupfd; | |
710 | struct sr_datafeed_packet packet; | |
711 | struct sr_datafeed_header header; | |
712 | struct sr_datafeed_meta_analog meta; | |
713 | struct sr_dev_inst *sdi; | |
714 | struct context *ctx; | |
715 | int i; | |
716 | ||
717 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
718 | return SR_ERR; | |
719 | ||
720 | if (sdi->status != SR_ST_ACTIVE) | |
721 | return SR_ERR; | |
722 | ||
723 | ctx = sdi->priv; | |
724 | ctx->cb_data = cb_data; | |
725 | ||
726 | if (dso_init(ctx) != SR_OK) | |
727 | return SR_ERR; | |
728 | ||
729 | if (dso_capture_start(ctx) != SR_OK) | |
730 | return SR_ERR; | |
731 | ||
732 | ctx->dev_state = CAPTURE; | |
733 | lupfd = libusb_get_pollfds(usb_context); | |
734 | for (i = 0; lupfd[i]; i++) | |
735 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event, | |
736 | ctx); | |
737 | free(lupfd); | |
738 | ||
739 | /* Send header packet to the session bus. */ | |
740 | packet.type = SR_DF_HEADER; | |
741 | packet.payload = (unsigned char *)&header; | |
742 | header.feed_version = 1; | |
743 | gettimeofday(&header.starttime, NULL); | |
744 | sr_session_send(cb_data, &packet); | |
745 | ||
746 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
747 | packet.type = SR_DF_META_ANALOG; | |
748 | packet.payload = &meta; | |
749 | meta.num_probes = ctx->profile->num_probes; | |
750 | sr_session_send(cb_data, &packet); | |
751 | ||
752 | return SR_OK; | |
753 | } | |
754 | ||
755 | /* TODO: doesn't really cancel pending transfers so they might come in after | |
756 | * SR_DF_END is sent. | |
757 | */ | |
758 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data) | |
759 | { | |
760 | struct sr_datafeed_packet packet; | |
761 | struct sr_dev_inst *sdi; | |
762 | struct context *ctx; | |
763 | ||
764 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
765 | return SR_ERR; | |
766 | ||
767 | if (sdi->status != SR_ST_ACTIVE) | |
768 | return SR_ERR; | |
769 | ||
770 | ctx = sdi->priv; | |
771 | ctx->dev_state = IDLE; | |
772 | ||
773 | packet.type = SR_DF_END; | |
774 | sr_session_send(cb_data, &packet); | |
775 | ||
776 | return SR_OK; | |
777 | } | |
778 | ||
779 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info = { | |
780 | .name = "hantek-dso", | |
781 | .longname = "Hantek DSO", | |
782 | .api_version = 1, | |
783 | .init = hw_init, | |
784 | .cleanup = hw_cleanup, | |
785 | .dev_open = hw_dev_open, | |
786 | .dev_close = hw_dev_close, | |
787 | .dev_info_get = hw_dev_info_get, | |
788 | .dev_status_get = hw_dev_status_get, | |
789 | .hwcap_get_all = hw_hwcap_get_all, | |
790 | .dev_config_set = hw_dev_config_set, | |
791 | .dev_acquisition_start = hw_dev_acquisition_start, | |
792 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
793 | }; |