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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 "libsigrok.h" | |
33 | #include "libsigrok-internal.h" | |
34 | #include "config.h" | |
35 | #include "dso.h" | |
36 | ||
37 | ||
38 | /* Max time in ms before we want to check on USB events */ | |
39 | /* TODO tune this properly */ | |
40 | #define TICK 1 | |
41 | ||
42 | static const int hwcaps[] = { | |
43 | SR_HWCAP_OSCILLOSCOPE, | |
44 | SR_HWCAP_LIMIT_SAMPLES, | |
45 | SR_HWCAP_CONTINUOUS, | |
46 | SR_HWCAP_TIMEBASE, | |
47 | SR_HWCAP_BUFFERSIZE, | |
48 | SR_HWCAP_TRIGGER_SOURCE, | |
49 | SR_HWCAP_TRIGGER_SLOPE, | |
50 | SR_HWCAP_HORIZ_TRIGGERPOS, | |
51 | SR_HWCAP_FILTER, | |
52 | SR_HWCAP_VDIV, | |
53 | SR_HWCAP_COUPLING, | |
54 | 0, | |
55 | }; | |
56 | ||
57 | static const char *probe_names[] = { | |
58 | "CH1", | |
59 | "CH2", | |
60 | NULL, | |
61 | }; | |
62 | ||
63 | static const struct dso_profile dev_profiles[] = { | |
64 | { 0x04b4, 0x2090, 0x04b5, 0x2090, | |
65 | "Hantek", "DSO-2090", | |
66 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
67 | { 0x04b4, 0x2150, 0x04b5, 0x2150, | |
68 | "Hantek", "DSO-2150", | |
69 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
70 | { 0x04b4, 0x2250, 0x04b5, 0x2250, | |
71 | "Hantek", "DSO-2250", | |
72 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
73 | { 0x04b4, 0x5200, 0x04b5, 0x5200, | |
74 | "Hantek", "DSO-5200", | |
75 | FIRMWARE_DIR "/hantek-dso-5xxx.fw" }, | |
76 | { 0x04b4, 0x520a, 0x04b5, 0x520a, | |
77 | "Hantek", "DSO-5200A", | |
78 | FIRMWARE_DIR "/hantek-dso-5xxx.fw" }, | |
79 | { 0, 0, 0, 0, 0, 0, 0 }, | |
80 | }; | |
81 | ||
82 | static const uint64_t buffersizes[] = { | |
83 | 10240, | |
84 | 32768, | |
85 | /* TODO: 65535 */ | |
86 | 0, | |
87 | }; | |
88 | ||
89 | static const struct sr_rational timebases[] = { | |
90 | /* microseconds */ | |
91 | { 10, 1000000 }, | |
92 | { 20, 1000000 }, | |
93 | { 40, 1000000 }, | |
94 | { 100, 1000000 }, | |
95 | { 200, 1000000 }, | |
96 | { 400, 1000000 }, | |
97 | /* milliseconds */ | |
98 | { 1, 1000 }, | |
99 | { 2, 1000 }, | |
100 | { 4, 1000 }, | |
101 | { 10, 1000 }, | |
102 | { 20, 1000 }, | |
103 | { 40, 1000 }, | |
104 | { 100, 1000 }, | |
105 | { 200, 1000 }, | |
106 | { 400, 1000 }, | |
107 | { 0, 0}, | |
108 | }; | |
109 | ||
110 | static const struct sr_rational vdivs[] = { | |
111 | /* millivolts */ | |
112 | { 10, 1000 }, | |
113 | { 20, 1000 }, | |
114 | { 50, 1000 }, | |
115 | { 100, 1000 }, | |
116 | { 200, 1000 }, | |
117 | { 500, 1000 }, | |
118 | /* volts */ | |
119 | { 1, 1 }, | |
120 | { 2, 1 }, | |
121 | { 5, 1 }, | |
122 | { 0, 0 }, | |
123 | }; | |
124 | ||
125 | static const char *trigger_sources[] = { | |
126 | "CH1", | |
127 | "CH2", | |
128 | "EXT", | |
129 | /* TODO: forced */ | |
130 | NULL, | |
131 | }; | |
132 | ||
133 | static const char *filter_targets[] = { | |
134 | "CH1", | |
135 | "CH2", | |
136 | /* TODO: "TRIGGER", */ | |
137 | NULL, | |
138 | }; | |
139 | ||
140 | static const char *coupling[] = { | |
141 | "AC", | |
142 | "DC", | |
143 | "GND", | |
144 | NULL, | |
145 | }; | |
146 | ||
147 | SR_PRIV libusb_context *usb_context = NULL; | |
148 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info; | |
149 | static struct sr_dev_driver *hdi = &hantek_dso_driver_info; | |
150 | ||
151 | static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof) | |
152 | { | |
153 | struct sr_dev_inst *sdi; | |
154 | struct context *ctx; | |
155 | ||
156 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
157 | prof->vendor, prof->model, NULL); | |
158 | if (!sdi) | |
159 | return NULL; | |
160 | ||
161 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
162 | sr_err("hantek-dso: ctx malloc failed"); | |
163 | return NULL; | |
164 | } | |
165 | ctx->profile = prof; | |
166 | ctx->dev_state = IDLE; | |
167 | ctx->timebase = DEFAULT_TIMEBASE; | |
168 | ctx->ch1_enabled = TRUE; | |
169 | ctx->ch2_enabled = TRUE; | |
170 | ctx->voltage_ch1 = DEFAULT_VOLTAGE; | |
171 | ctx->voltage_ch2 = DEFAULT_VOLTAGE; | |
172 | ctx->coupling_ch1 = DEFAULT_COUPLING; | |
173 | ctx->coupling_ch2 = DEFAULT_COUPLING; | |
174 | ctx->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
175 | ctx->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
176 | ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
177 | ctx->framesize = DEFAULT_FRAMESIZE; | |
178 | ctx->triggerslope = SLOPE_POSITIVE; | |
179 | ctx->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE); | |
180 | ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
181 | sdi->priv = ctx; | |
182 | hdi->instances = g_slist_append(hdi->instances, sdi); | |
183 | ||
184 | return sdi; | |
185 | } | |
186 | ||
187 | static int configure_probes(struct context *ctx, const GSList *probes) | |
188 | { | |
189 | const struct sr_probe *probe; | |
190 | const GSList *l; | |
191 | ||
192 | ctx->ch1_enabled = ctx->ch2_enabled = FALSE; | |
193 | for (l = probes; l; l = l->next) { | |
194 | probe = (struct sr_probe *)l->data; | |
195 | if (probe->index == 1) | |
196 | ctx->ch1_enabled = probe->enabled; | |
197 | else if (probe->index == 2) | |
198 | ctx->ch2_enabled = probe->enabled; | |
199 | } | |
200 | ||
201 | return SR_OK; | |
202 | } | |
203 | ||
204 | static int hw_init(void) | |
205 | { | |
206 | ||
207 | if (libusb_init(&usb_context) != 0) { | |
208 | sr_err("hantek-dso: Failed to initialize USB."); | |
209 | return SR_ERR; | |
210 | } | |
211 | ||
212 | return SR_OK; | |
213 | } | |
214 | ||
215 | static int hw_scan(void) | |
216 | { | |
217 | struct sr_dev_inst *sdi; | |
218 | struct libusb_device_descriptor des; | |
219 | const struct dso_profile *prof; | |
220 | struct context *ctx; | |
221 | libusb_device **devlist; | |
222 | int devcnt, ret, i, j; | |
223 | ||
224 | /* Find all Hantek DSO devices and upload firmware to all of them. */ | |
225 | devcnt = 0; | |
226 | libusb_get_device_list(usb_context, &devlist); | |
227 | for (i = 0; devlist[i]; i++) { | |
228 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
229 | sr_err("hantek-dso: failed to get device descriptor: %d", ret); | |
230 | continue; | |
231 | } | |
232 | ||
233 | prof = NULL; | |
234 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
235 | if (des.idVendor == dev_profiles[j].orig_vid | |
236 | && des.idProduct == dev_profiles[j].orig_pid) { | |
237 | /* Device matches the pre-firmware profile. */ | |
238 | prof = &dev_profiles[j]; | |
239 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
240 | sdi = dso_dev_new(devcnt, prof); | |
241 | ctx = sdi->priv; | |
242 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
243 | prof->firmware) == SR_OK) | |
244 | /* Remember when the firmware on this device was updated */ | |
245 | ctx->fw_updated = g_get_monotonic_time(); | |
246 | else | |
247 | sr_err("hantek-dso: firmware upload failed for " | |
248 | "device %d", devcnt); | |
249 | /* Dummy USB address of 0xff will get overwritten later. */ | |
250 | ctx->usb = sr_usb_dev_inst_new( | |
251 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
252 | devcnt++; | |
253 | break; | |
254 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
255 | && des.idProduct == dev_profiles[j].fw_pid) { | |
256 | /* Device matches the post-firmware profile. */ | |
257 | prof = &dev_profiles[j]; | |
258 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
259 | sdi = dso_dev_new(devcnt, prof); | |
260 | sdi->status = SR_ST_INACTIVE; | |
261 | ctx = sdi->priv; | |
262 | ctx->usb = sr_usb_dev_inst_new( | |
263 | libusb_get_bus_number(devlist[i]), | |
264 | libusb_get_device_address(devlist[i]), NULL); | |
265 | devcnt++; | |
266 | break; | |
267 | } | |
268 | } | |
269 | if (!prof) | |
270 | /* not a supported VID/PID */ | |
271 | continue; | |
272 | } | |
273 | libusb_free_device_list(devlist, 1); | |
274 | ||
275 | return devcnt; | |
276 | } | |
277 | ||
278 | static int hw_dev_open(int dev_index) | |
279 | { | |
280 | struct sr_dev_inst *sdi; | |
281 | struct context *ctx; | |
282 | int64_t timediff_us, timediff_ms; | |
283 | int err; | |
284 | ||
285 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
286 | return SR_ERR_ARG; | |
287 | ctx = sdi->priv; | |
288 | ||
289 | /* | |
290 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
291 | * for the FX2 to renumerate | |
292 | */ | |
293 | err = SR_ERR; | |
294 | if (ctx->fw_updated > 0) { | |
295 | sr_info("hantek-dso: waiting for device to reset"); | |
296 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
297 | g_usleep(300 * 1000); | |
298 | timediff_ms = 0; | |
299 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
300 | if ((err = dso_open(dev_index)) == SR_OK) | |
301 | break; | |
302 | g_usleep(100 * 1000); | |
303 | timediff_us = g_get_monotonic_time() - ctx->fw_updated; | |
304 | timediff_ms = timediff_us / 1000; | |
305 | sr_spew("hantek-dso: waited %" PRIi64 " ms", timediff_ms); | |
306 | } | |
307 | sr_info("hantek-dso: device came back after %d ms", timediff_ms); | |
308 | } else { | |
309 | err = dso_open(dev_index); | |
310 | } | |
311 | ||
312 | if (err != SR_OK) { | |
313 | sr_err("hantek-dso: unable to open device"); | |
314 | return SR_ERR; | |
315 | } | |
316 | ||
317 | err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
318 | if (err != 0) { | |
319 | sr_err("hantek-dso: Unable to claim interface: %d", err); | |
320 | return SR_ERR; | |
321 | } | |
322 | ||
323 | return SR_OK; | |
324 | } | |
325 | ||
326 | static int hw_dev_close(int dev_index) | |
327 | { | |
328 | struct sr_dev_inst *sdi; | |
329 | ||
330 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
331 | return SR_ERR_ARG; | |
332 | ||
333 | dso_close(sdi); | |
334 | ||
335 | return SR_OK; | |
336 | } | |
337 | ||
338 | static int hw_cleanup(void) | |
339 | { | |
340 | GSList *l; | |
341 | struct sr_dev_inst *sdi; | |
342 | struct context *ctx; | |
343 | ||
344 | /* Properly close and free all devices. */ | |
345 | for (l = hdi->instances; l; l = l->next) { | |
346 | if (!(sdi = l->data)) { | |
347 | /* Log error, but continue cleaning up the rest. */ | |
348 | sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__); | |
349 | continue; | |
350 | } | |
351 | if (!(ctx = sdi->priv)) { | |
352 | /* Log error, but continue cleaning up the rest. */ | |
353 | sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__); | |
354 | continue; | |
355 | } | |
356 | dso_close(sdi); | |
357 | sr_usb_dev_inst_free(ctx->usb); | |
358 | g_free(ctx->triggersource); | |
359 | ||
360 | sr_dev_inst_free(sdi); | |
361 | } | |
362 | ||
363 | g_slist_free(hdi->instances); | |
364 | hdi->instances = NULL; | |
365 | ||
366 | if (usb_context) | |
367 | libusb_exit(usb_context); | |
368 | usb_context = NULL; | |
369 | ||
370 | return SR_OK; | |
371 | } | |
372 | ||
373 | static const void *hw_dev_info_get(int dev_index, int dev_info_id) | |
374 | { | |
375 | struct sr_dev_inst *sdi; | |
376 | const void *info; | |
377 | uint64_t tmp; | |
378 | ||
379 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
380 | return NULL; | |
381 | ||
382 | info = NULL; | |
383 | switch (dev_info_id) { | |
384 | case SR_DI_INST: | |
385 | info = sdi; | |
386 | break; | |
387 | case SR_DI_NUM_PROBES: | |
388 | info = GINT_TO_POINTER(NUM_PROBES); | |
389 | break; | |
390 | case SR_DI_PROBE_NAMES: | |
391 | info = probe_names; | |
392 | break; | |
393 | case SR_DI_BUFFERSIZES: | |
394 | info = buffersizes; | |
395 | break; | |
396 | case SR_DI_TIMEBASES: | |
397 | info = timebases; | |
398 | break; | |
399 | case SR_DI_TRIGGER_SOURCES: | |
400 | info = trigger_sources; | |
401 | break; | |
402 | case SR_DI_FILTERS: | |
403 | info = filter_targets; | |
404 | break; | |
405 | case SR_DI_VDIVS: | |
406 | info = vdivs; | |
407 | break; | |
408 | case SR_DI_COUPLING: | |
409 | info = coupling; | |
410 | break; | |
411 | /* TODO remove this */ | |
412 | case SR_DI_CUR_SAMPLERATE: | |
413 | info = &tmp; | |
414 | break; | |
415 | } | |
416 | ||
417 | return info; | |
418 | } | |
419 | ||
420 | static int hw_dev_status_get(int dev_index) | |
421 | { | |
422 | struct sr_dev_inst *sdi; | |
423 | ||
424 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
425 | return SR_ST_NOT_FOUND; | |
426 | ||
427 | return sdi->status; | |
428 | } | |
429 | ||
430 | static const int *hw_hwcap_get_all(void) | |
431 | { | |
432 | return hwcaps; | |
433 | } | |
434 | ||
435 | static int hw_dev_config_set(int dev_index, int hwcap, const void *value) | |
436 | { | |
437 | struct sr_dev_inst *sdi; | |
438 | struct context *ctx; | |
439 | struct sr_rational tmp_rat; | |
440 | float tmp_float; | |
441 | uint64_t tmp_u64; | |
442 | int ret, i; | |
443 | char **targets; | |
444 | ||
445 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
446 | return SR_ERR; | |
447 | ||
448 | if (sdi->status != SR_ST_ACTIVE) | |
449 | return SR_ERR; | |
450 | ||
451 | ret = SR_OK; | |
452 | ctx = sdi->priv; | |
453 | switch (hwcap) { | |
454 | case SR_HWCAP_LIMIT_FRAMES: | |
455 | ctx->limit_frames = *(const uint64_t *)value; | |
456 | break; | |
457 | case SR_HWCAP_PROBECONFIG: | |
458 | ret = configure_probes(ctx, (const GSList *)value); | |
459 | break; | |
460 | case SR_HWCAP_TRIGGER_SLOPE: | |
461 | tmp_u64 = *(const int *)value; | |
462 | if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE) | |
463 | ret = SR_ERR_ARG; | |
464 | ctx->triggerslope = tmp_u64; | |
465 | break; | |
466 | case SR_HWCAP_HORIZ_TRIGGERPOS: | |
467 | tmp_float = *(const float *)value; | |
468 | if (tmp_float < 0.0 || tmp_float > 1.0) { | |
469 | sr_err("hantek-dso: trigger position should be between 0.0 and 1.0"); | |
470 | ret = SR_ERR_ARG; | |
471 | } else | |
472 | ctx->triggerposition = tmp_float; | |
473 | break; | |
474 | case SR_HWCAP_BUFFERSIZE: | |
475 | tmp_u64 = *(const int *)value; | |
476 | for (i = 0; buffersizes[i]; i++) { | |
477 | if (buffersizes[i] == tmp_u64) { | |
478 | ctx->framesize = tmp_u64; | |
479 | break; | |
480 | } | |
481 | } | |
482 | if (buffersizes[i] == 0) | |
483 | ret = SR_ERR_ARG; | |
484 | break; | |
485 | case SR_HWCAP_TIMEBASE: | |
486 | tmp_rat = *(const struct sr_rational *)value; | |
487 | for (i = 0; timebases[i].p && timebases[i].q; i++) { | |
488 | if (timebases[i].p == tmp_rat.p | |
489 | && timebases[i].q == tmp_rat.q) { | |
490 | ctx->timebase = i; | |
491 | break; | |
492 | } | |
493 | } | |
494 | if (timebases[i].p == 0 && timebases[i].q == 0) | |
495 | ret = SR_ERR_ARG; | |
496 | break; | |
497 | case SR_HWCAP_TRIGGER_SOURCE: | |
498 | for (i = 0; trigger_sources[i]; i++) { | |
499 | if (!strcmp(value, trigger_sources[i])) { | |
500 | ctx->triggersource = g_strdup(value); | |
501 | break; | |
502 | } | |
503 | } | |
504 | if (trigger_sources[i] == 0) | |
505 | ret = SR_ERR_ARG; | |
506 | break; | |
507 | case SR_HWCAP_FILTER: | |
508 | ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0; | |
509 | targets = g_strsplit(value, ",", 0); | |
510 | for (i = 0; targets[i]; i++) { | |
511 | if (targets[i] == '\0') | |
512 | /* Empty filter string can be used to clear them all. */ | |
513 | ; | |
514 | else if (!strcmp(targets[i], "CH1")) | |
515 | ctx->filter_ch1 = TRUE; | |
516 | else if (!strcmp(targets[i], "CH2")) | |
517 | ctx->filter_ch2 = TRUE; | |
518 | else if (!strcmp(targets[i], "TRIGGER")) | |
519 | ctx->filter_trigger = TRUE; | |
520 | else { | |
521 | sr_err("invalid filter target %s", targets[i]); | |
522 | ret = SR_ERR_ARG; | |
523 | } | |
524 | } | |
525 | g_strfreev(targets); | |
526 | break; | |
527 | case SR_HWCAP_VDIV: | |
528 | /* TODO not supporting vdiv per channel yet */ | |
529 | tmp_rat = *(const struct sr_rational *)value; | |
530 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
531 | if (vdivs[i].p == tmp_rat.p | |
532 | && vdivs[i].q == tmp_rat.q) { | |
533 | ctx->voltage_ch1 = i; | |
534 | ctx->voltage_ch2 = i; | |
535 | break; | |
536 | } | |
537 | } | |
538 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
539 | ret = SR_ERR_ARG; | |
540 | break; | |
541 | case SR_HWCAP_COUPLING: | |
542 | /* TODO not supporting coupling per channel yet */ | |
543 | for (i = 0; coupling[i]; i++) { | |
544 | if (!strcmp(value, coupling[i])) { | |
545 | ctx->coupling_ch1 = i; | |
546 | ctx->coupling_ch2 = i; | |
547 | break; | |
548 | } | |
549 | } | |
550 | if (coupling[i] == 0) | |
551 | ret = SR_ERR_ARG; | |
552 | break; | |
553 | default: | |
554 | ret = SR_ERR_ARG; | |
555 | } | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
560 | static void send_chunk(struct context *ctx, unsigned char *buf, | |
561 | int num_samples) | |
562 | { | |
563 | struct sr_datafeed_packet packet; | |
564 | struct sr_datafeed_analog analog; | |
565 | float ch1, ch2, range; | |
566 | int num_probes, data_offset, i; | |
567 | ||
568 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; | |
569 | packet.type = SR_DF_ANALOG; | |
570 | packet.payload = &analog; | |
571 | /* TODO: support for 5xxx series 9-bit samples */ | |
572 | analog.num_samples = num_samples; | |
573 | analog.mq = SR_MQ_VOLTAGE; | |
574 | analog.unit = SR_UNIT_VOLT; | |
575 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
576 | data_offset = 0; | |
577 | for (i = 0; i < analog.num_samples; i++) { | |
578 | /* The device always sends data for both channels. If a channel | |
579 | * is disabled, it contains a copy of the enabled channel's | |
580 | * data. However, we only send the requested channels to the bus. | |
581 | * | |
582 | * Voltage values are encoded as a value 0-255 (0-512 on the 5200*), | |
583 | * where the value is a point in the range represented by the vdiv | |
584 | * setting. There are 8 vertical divs, so e.g. 500mV/div represents | |
585 | * 4V peak-to-peak where 0 = -2V and 255 = +2V. | |
586 | */ | |
587 | /* TODO: support for 5xxx series 9-bit samples */ | |
588 | if (ctx->ch1_enabled) { | |
589 | range = ((float)vdivs[ctx->voltage_ch1].p / vdivs[ctx->voltage_ch1].q) * 8; | |
590 | ch1 = range / 255 * *(buf + i * 2 + 1); | |
591 | /* Value is centered around 0V. */ | |
592 | ch1 -= range / 2; | |
593 | analog.data[data_offset++] = ch1; | |
594 | } | |
595 | if (ctx->ch2_enabled) { | |
596 | range = ((float)vdivs[ctx->voltage_ch2].p / vdivs[ctx->voltage_ch2].q) * 8; | |
597 | ch2 = range / 255 * *(buf + i * 2); | |
598 | ch2 -= range / 2; | |
599 | analog.data[data_offset++] = ch2; | |
600 | } | |
601 | } | |
602 | sr_session_send(ctx->cb_data, &packet); | |
603 | ||
604 | } | |
605 | ||
606 | /* Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
607 | * Only channel data comes in asynchronously, and all transfers for this are | |
608 | * queued up beforehand, so this just needs so chuck the incoming data onto | |
609 | * the libsigrok session bus. | |
610 | */ | |
611 | static void receive_transfer(struct libusb_transfer *transfer) | |
612 | { | |
613 | struct sr_datafeed_packet packet; | |
614 | struct context *ctx; | |
615 | int num_samples, pre; | |
616 | ||
617 | ctx = transfer->user_data; | |
618 | sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes", | |
619 | transfer->status, transfer->actual_length); | |
620 | ||
621 | if (transfer->actual_length == 0) | |
622 | /* Nothing to send to the bus. */ | |
623 | return; | |
624 | ||
625 | num_samples = transfer->actual_length / 2; | |
626 | ||
627 | sr_dbg("hantek-dso: got %d-%d/%d samples in frame", ctx->samp_received + 1, | |
628 | ctx->samp_received + num_samples, ctx->framesize); | |
629 | ||
630 | /* The device always sends a full frame, but the beginning of the frame | |
631 | * doesn't represent the trigger point. The offset at which the trigger | |
632 | * happened came in with the capture state, so we need to start sending | |
633 | * from there up the session bus. The samples in the frame buffer before | |
634 | * that trigger point came after the end of the device's frame buffer was | |
635 | * reached, and it wrapped around to overwrite up until the trigger point. | |
636 | */ | |
637 | if (ctx->samp_received < ctx->trigger_offset) { | |
638 | /* Trigger point not yet reached. */ | |
639 | if (ctx->samp_received + num_samples < ctx->trigger_offset) { | |
640 | /* The entire chunk is before the trigger point. */ | |
641 | memcpy(ctx->framebuf + ctx->samp_buffered * 2, | |
642 | transfer->buffer, num_samples * 2); | |
643 | ctx->samp_buffered += num_samples; | |
644 | } else { | |
645 | /* This chunk hits or overruns the trigger point. | |
646 | * Store the part before the trigger fired, and | |
647 | * send the rest up to the session bus. */ | |
648 | pre = ctx->trigger_offset - ctx->samp_received; | |
649 | memcpy(ctx->framebuf + ctx->samp_buffered * 2, | |
650 | transfer->buffer, pre * 2); | |
651 | ctx->samp_buffered += pre; | |
652 | ||
653 | /* The rest of this chunk starts with the trigger point. */ | |
654 | sr_dbg("hantek-dso: reached trigger point, %d samples buffered", | |
655 | ctx->samp_buffered); | |
656 | ||
657 | /* Avoid the corner case where the chunk ended at | |
658 | * exactly the trigger point. */ | |
659 | if (num_samples > pre) | |
660 | send_chunk(ctx, transfer->buffer + pre * 2, | |
661 | num_samples - pre); | |
662 | } | |
663 | } else { | |
664 | /* Already past the trigger point, just send it all out. */ | |
665 | send_chunk(ctx, transfer->buffer, | |
666 | num_samples); | |
667 | } | |
668 | ||
669 | ctx->samp_received += num_samples; | |
670 | ||
671 | /* Everything in this transfer was either copied to the buffer or | |
672 | * sent to the session bus. */ | |
673 | g_free(transfer->buffer); | |
674 | libusb_free_transfer(transfer); | |
675 | ||
676 | if (ctx->samp_received >= ctx->framesize) { | |
677 | /* That was the last chunk in this frame. Send the buffered | |
678 | * pre-trigger samples out now, in one big chunk. */ | |
679 | sr_dbg("hantek-dso: end of frame, sending %d pre-trigger buffered samples", | |
680 | ctx->samp_buffered); | |
681 | send_chunk(ctx, ctx->framebuf, ctx->samp_buffered); | |
682 | ||
683 | /* Mark the end of this frame. */ | |
684 | packet.type = SR_DF_FRAME_END; | |
685 | sr_session_send(ctx->cb_data, &packet); | |
686 | ||
687 | if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) { | |
688 | /* Terminate session */ | |
689 | /* TODO: don't leave pending USB transfers hanging */ | |
690 | packet.type = SR_DF_END; | |
691 | sr_session_send(ctx->cb_data, &packet); | |
692 | } else { | |
693 | ctx->dev_state = NEW_CAPTURE; | |
694 | } | |
695 | } | |
696 | ||
697 | } | |
698 | ||
699 | static int handle_event(int fd, int revents, void *cb_data) | |
700 | { | |
701 | struct sr_datafeed_packet packet; | |
702 | struct timeval tv; | |
703 | struct context *ctx; | |
704 | int num_probes; | |
705 | uint32_t trigger_offset; | |
706 | uint8_t capturestate; | |
707 | ||
708 | /* Avoid compiler warnings. */ | |
709 | (void)fd; | |
710 | (void)revents; | |
711 | ||
712 | /* Always handle pending libusb events. */ | |
713 | tv.tv_sec = tv.tv_usec = 0; | |
714 | libusb_handle_events_timeout(usb_context, &tv); | |
715 | ||
716 | ctx = cb_data; | |
717 | /* TODO: ugh */ | |
718 | if (ctx->dev_state == NEW_CAPTURE) { | |
719 | if (dso_capture_start(ctx) != SR_OK) | |
720 | return TRUE; | |
721 | if (dso_enable_trigger(ctx) != SR_OK) | |
722 | return TRUE; | |
723 | // if (dso_force_trigger(ctx) != SR_OK) | |
724 | // return TRUE; | |
725 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
726 | ctx->dev_state = CAPTURE; | |
727 | return TRUE; | |
728 | } | |
729 | if (ctx->dev_state != CAPTURE) | |
730 | return TRUE; | |
731 | ||
732 | if ((dso_get_capturestate(ctx, &capturestate, &trigger_offset)) != SR_OK) | |
733 | return TRUE; | |
734 | ||
735 | sr_dbg("hantek-dso: capturestate %d", capturestate); | |
736 | sr_dbg("hantek-dso: trigger offset 0x%.6x", trigger_offset); | |
737 | switch (capturestate) { | |
738 | case CAPTURE_EMPTY: | |
739 | if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
740 | ctx->capture_empty_count = 0; | |
741 | if (dso_capture_start(ctx) != SR_OK) | |
742 | break; | |
743 | if (dso_enable_trigger(ctx) != SR_OK) | |
744 | break; | |
745 | // if (dso_force_trigger(ctx) != SR_OK) | |
746 | // break; | |
747 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
748 | } | |
749 | break; | |
750 | case CAPTURE_FILLING: | |
751 | /* no data yet */ | |
752 | break; | |
753 | case CAPTURE_READY_8BIT: | |
754 | /* Remember where in the captured frame the trigger is. */ | |
755 | ctx->trigger_offset = trigger_offset; | |
756 | ||
757 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; | |
758 | ctx->framebuf = g_try_malloc(ctx->framesize * num_probes * 2); | |
759 | ctx->samp_buffered = ctx->samp_received = 0; | |
760 | ||
761 | /* Tell the scope to send us the first frame. */ | |
762 | if (dso_get_channeldata(ctx, receive_transfer) != SR_OK) | |
763 | break; | |
764 | ||
765 | /* Don't hit the state machine again until we're done fetching | |
766 | * the data we just told the scope to send. | |
767 | */ | |
768 | ctx->dev_state = FETCH_DATA; | |
769 | ||
770 | /* Tell the frontend a new frame is on the way. */ | |
771 | packet.type = SR_DF_FRAME_BEGIN; | |
772 | sr_session_send(cb_data, &packet); | |
773 | break; | |
774 | case CAPTURE_READY_9BIT: | |
775 | /* TODO */ | |
776 | sr_err("not yet supported"); | |
777 | break; | |
778 | case CAPTURE_TIMEOUT: | |
779 | /* Doesn't matter, we'll try again next time. */ | |
780 | break; | |
781 | default: | |
782 | sr_dbg("unknown capture state"); | |
783 | } | |
784 | ||
785 | return TRUE; | |
786 | } | |
787 | ||
788 | static int hw_dev_acquisition_start(int dev_index, void *cb_data) | |
789 | { | |
790 | const struct libusb_pollfd **lupfd; | |
791 | struct sr_datafeed_packet packet; | |
792 | struct sr_datafeed_header header; | |
793 | struct sr_datafeed_meta_analog meta; | |
794 | struct sr_dev_inst *sdi; | |
795 | struct context *ctx; | |
796 | int i; | |
797 | ||
798 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
799 | return SR_ERR; | |
800 | ||
801 | if (sdi->status != SR_ST_ACTIVE) | |
802 | return SR_ERR; | |
803 | ||
804 | ctx = sdi->priv; | |
805 | ctx->cb_data = cb_data; | |
806 | ||
807 | if (dso_init(ctx) != SR_OK) | |
808 | return SR_ERR; | |
809 | ||
810 | if (dso_capture_start(ctx) != SR_OK) | |
811 | return SR_ERR; | |
812 | ||
813 | ctx->dev_state = CAPTURE; | |
814 | lupfd = libusb_get_pollfds(usb_context); | |
815 | for (i = 0; lupfd[i]; i++) | |
816 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event, | |
817 | ctx); | |
818 | free(lupfd); | |
819 | ||
820 | /* Send header packet to the session bus. */ | |
821 | packet.type = SR_DF_HEADER; | |
822 | packet.payload = (unsigned char *)&header; | |
823 | header.feed_version = 1; | |
824 | gettimeofday(&header.starttime, NULL); | |
825 | sr_session_send(cb_data, &packet); | |
826 | ||
827 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
828 | packet.type = SR_DF_META_ANALOG; | |
829 | packet.payload = &meta; | |
830 | meta.num_probes = NUM_PROBES; | |
831 | sr_session_send(cb_data, &packet); | |
832 | ||
833 | return SR_OK; | |
834 | } | |
835 | ||
836 | /* TODO: doesn't really cancel pending transfers so they might come in after | |
837 | * SR_DF_END is sent. | |
838 | */ | |
839 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data) | |
840 | { | |
841 | struct sr_datafeed_packet packet; | |
842 | struct sr_dev_inst *sdi; | |
843 | struct context *ctx; | |
844 | ||
845 | if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index))) | |
846 | return SR_ERR; | |
847 | ||
848 | if (sdi->status != SR_ST_ACTIVE) | |
849 | return SR_ERR; | |
850 | ||
851 | ctx = sdi->priv; | |
852 | ctx->dev_state = IDLE; | |
853 | ||
854 | packet.type = SR_DF_END; | |
855 | sr_session_send(cb_data, &packet); | |
856 | ||
857 | return SR_OK; | |
858 | } | |
859 | ||
860 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info = { | |
861 | .name = "hantek-dso", | |
862 | .longname = "Hantek DSO", | |
863 | .api_version = 1, | |
864 | .init = hw_init, | |
865 | .cleanup = hw_cleanup, | |
866 | .scan = hw_scan, | |
867 | .dev_open = hw_dev_open, | |
868 | .dev_close = hw_dev_close, | |
869 | .dev_info_get = hw_dev_info_get, | |
870 | .dev_status_get = hw_dev_status_get, | |
871 | .hwcap_get_all = hw_hwcap_get_all, | |
872 | .dev_config_set = hw_dev_config_set, | |
873 | .dev_acquisition_start = hw_dev_acquisition_start, | |
874 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
875 | .instances = NULL, | |
876 | }; |