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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 "dso.h" | |
35 | ||
36 | /* Max time in ms before we want to check on USB events */ | |
37 | /* TODO tune this properly */ | |
38 | #define TICK 1 | |
39 | ||
40 | static const int hwcaps[] = { | |
41 | SR_CONF_OSCILLOSCOPE, | |
42 | SR_CONF_LIMIT_SAMPLES, | |
43 | SR_CONF_CONTINUOUS, | |
44 | SR_CONF_TIMEBASE, | |
45 | SR_CONF_BUFFERSIZE, | |
46 | SR_CONF_TRIGGER_SOURCE, | |
47 | SR_CONF_TRIGGER_SLOPE, | |
48 | SR_CONF_HORIZ_TRIGGERPOS, | |
49 | SR_CONF_FILTER, | |
50 | SR_CONF_VDIV, | |
51 | SR_CONF_COUPLING, | |
52 | 0, | |
53 | }; | |
54 | ||
55 | static const char *probe_names[] = { | |
56 | "CH1", "CH2", | |
57 | NULL, | |
58 | }; | |
59 | ||
60 | static const struct dso_profile dev_profiles[] = { | |
61 | { 0x04b4, 0x2090, 0x04b5, 0x2090, | |
62 | "Hantek", "DSO-2090", | |
63 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
64 | { 0x04b4, 0x2150, 0x04b5, 0x2150, | |
65 | "Hantek", "DSO-2150", | |
66 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
67 | { 0x04b4, 0x2250, 0x04b5, 0x2250, | |
68 | "Hantek", "DSO-2250", | |
69 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
70 | { 0x04b4, 0x5200, 0x04b5, 0x5200, | |
71 | "Hantek", "DSO-5200", | |
72 | FIRMWARE_DIR "/hantek-dso-5xxx.fw" }, | |
73 | { 0x04b4, 0x520a, 0x04b5, 0x520a, | |
74 | "Hantek", "DSO-5200A", | |
75 | FIRMWARE_DIR "/hantek-dso-5xxx.fw" }, | |
76 | { 0, 0, 0, 0, 0, 0, 0 }, | |
77 | }; | |
78 | ||
79 | static const uint64_t buffersizes[] = { | |
80 | 10240, | |
81 | 32768, | |
82 | /* TODO: 65535 */ | |
83 | 0, | |
84 | }; | |
85 | ||
86 | static const struct sr_rational timebases[] = { | |
87 | /* microseconds */ | |
88 | { 10, 1000000 }, | |
89 | { 20, 1000000 }, | |
90 | { 40, 1000000 }, | |
91 | { 100, 1000000 }, | |
92 | { 200, 1000000 }, | |
93 | { 400, 1000000 }, | |
94 | /* milliseconds */ | |
95 | { 1, 1000 }, | |
96 | { 2, 1000 }, | |
97 | { 4, 1000 }, | |
98 | { 10, 1000 }, | |
99 | { 20, 1000 }, | |
100 | { 40, 1000 }, | |
101 | { 100, 1000 }, | |
102 | { 200, 1000 }, | |
103 | { 400, 1000 }, | |
104 | { 0, 0}, | |
105 | }; | |
106 | ||
107 | static const struct sr_rational vdivs[] = { | |
108 | /* millivolts */ | |
109 | { 10, 1000 }, | |
110 | { 20, 1000 }, | |
111 | { 50, 1000 }, | |
112 | { 100, 1000 }, | |
113 | { 200, 1000 }, | |
114 | { 500, 1000 }, | |
115 | /* volts */ | |
116 | { 1, 1 }, | |
117 | { 2, 1 }, | |
118 | { 5, 1 }, | |
119 | { 0, 0 }, | |
120 | }; | |
121 | ||
122 | static const char *trigger_sources[] = { | |
123 | "CH1", | |
124 | "CH2", | |
125 | "EXT", | |
126 | /* TODO: forced */ | |
127 | NULL, | |
128 | }; | |
129 | ||
130 | static const char *filter_targets[] = { | |
131 | "CH1", | |
132 | "CH2", | |
133 | /* TODO: "TRIGGER", */ | |
134 | NULL, | |
135 | }; | |
136 | ||
137 | static const char *coupling[] = { | |
138 | "AC", | |
139 | "DC", | |
140 | "GND", | |
141 | NULL, | |
142 | }; | |
143 | ||
144 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info; | |
145 | static struct sr_dev_driver *di = &hantek_dso_driver_info; | |
146 | ||
147 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); | |
148 | ||
149 | static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof) | |
150 | { | |
151 | struct sr_dev_inst *sdi; | |
152 | struct sr_probe *probe; | |
153 | struct drv_context *drvc; | |
154 | struct dev_context *devc; | |
155 | int i; | |
156 | ||
157 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
158 | prof->vendor, prof->model, NULL); | |
159 | if (!sdi) | |
160 | return NULL; | |
161 | sdi->driver = di; | |
162 | ||
163 | /* | |
164 | * Add only the real probes -- EXT isn't a source of data, only | |
165 | * a trigger source internal to the device. | |
166 | */ | |
167 | for (i = 0; probe_names[i]; i++) { | |
168 | if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, | |
169 | probe_names[i]))) | |
170 | return NULL; | |
171 | sdi->probes = g_slist_append(sdi->probes, probe); | |
172 | } | |
173 | ||
174 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { | |
175 | sr_err("Device context malloc failed."); | |
176 | return NULL; | |
177 | } | |
178 | ||
179 | devc->profile = prof; | |
180 | devc->dev_state = IDLE; | |
181 | devc->timebase = DEFAULT_TIMEBASE; | |
182 | devc->ch1_enabled = TRUE; | |
183 | devc->ch2_enabled = TRUE; | |
184 | devc->voltage_ch1 = DEFAULT_VOLTAGE; | |
185 | devc->voltage_ch2 = DEFAULT_VOLTAGE; | |
186 | devc->coupling_ch1 = DEFAULT_COUPLING; | |
187 | devc->coupling_ch2 = DEFAULT_COUPLING; | |
188 | devc->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
189 | devc->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
190 | devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
191 | devc->framesize = DEFAULT_FRAMESIZE; | |
192 | devc->triggerslope = SLOPE_POSITIVE; | |
193 | devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE); | |
194 | devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
195 | sdi->priv = devc; | |
196 | drvc = di->priv; | |
197 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
198 | ||
199 | return sdi; | |
200 | } | |
201 | ||
202 | static int configure_probes(const struct sr_dev_inst *sdi) | |
203 | { | |
204 | struct dev_context *devc; | |
205 | struct sr_probe *probe; | |
206 | const GSList *l; | |
207 | int p; | |
208 | ||
209 | devc = sdi->priv; | |
210 | ||
211 | g_slist_free(devc->enabled_probes); | |
212 | devc->ch1_enabled = devc->ch2_enabled = FALSE; | |
213 | for (l = sdi->probes, p = 0; l; l = l->next, p++) { | |
214 | probe = l->data; | |
215 | if (p == 0) | |
216 | devc->ch1_enabled = probe->enabled; | |
217 | else | |
218 | devc->ch2_enabled = probe->enabled; | |
219 | if (probe->enabled) | |
220 | devc->enabled_probes = g_slist_append(devc->enabled_probes, probe); | |
221 | } | |
222 | ||
223 | return SR_OK; | |
224 | } | |
225 | ||
226 | /* Properly close and free all devices. */ | |
227 | static int clear_instances(void) | |
228 | { | |
229 | struct sr_dev_inst *sdi; | |
230 | struct drv_context *drvc; | |
231 | struct dev_context *devc; | |
232 | GSList *l; | |
233 | ||
234 | drvc = di->priv; | |
235 | for (l = drvc->instances; l; l = l->next) { | |
236 | if (!(sdi = l->data)) { | |
237 | /* Log error, but continue cleaning up the rest. */ | |
238 | sr_err("%s: sdi was NULL, continuing", __func__); | |
239 | continue; | |
240 | } | |
241 | if (!(devc = sdi->priv)) { | |
242 | /* Log error, but continue cleaning up the rest. */ | |
243 | sr_err("%s: sdi->priv was NULL, continuing", __func__); | |
244 | continue; | |
245 | } | |
246 | dso_close(sdi); | |
247 | sr_usb_dev_inst_free(devc->usb); | |
248 | g_free(devc->triggersource); | |
249 | g_slist_free(devc->enabled_probes); | |
250 | ||
251 | sr_dev_inst_free(sdi); | |
252 | } | |
253 | ||
254 | g_slist_free(drvc->instances); | |
255 | drvc->instances = NULL; | |
256 | ||
257 | return SR_OK; | |
258 | } | |
259 | ||
260 | static int hw_init(struct sr_context *sr_ctx) | |
261 | { | |
262 | struct drv_context *drvc; | |
263 | ||
264 | if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) { | |
265 | sr_err("Driver context malloc failed."); | |
266 | return SR_ERR_MALLOC; | |
267 | } | |
268 | ||
269 | drvc->sr_ctx = sr_ctx; | |
270 | di->priv = drvc; | |
271 | ||
272 | return SR_OK; | |
273 | } | |
274 | ||
275 | static GSList *hw_scan(GSList *options) | |
276 | { | |
277 | struct sr_dev_inst *sdi; | |
278 | const struct dso_profile *prof; | |
279 | struct drv_context *drvc; | |
280 | struct dev_context *devc; | |
281 | GSList *devices; | |
282 | struct libusb_device_descriptor des; | |
283 | libusb_device **devlist; | |
284 | int devcnt, ret, i, j; | |
285 | ||
286 | (void)options; | |
287 | ||
288 | devcnt = 0; | |
289 | devices = 0; | |
290 | drvc = di->priv; | |
291 | drvc->instances = NULL; | |
292 | ||
293 | clear_instances(); | |
294 | ||
295 | /* Find all Hantek DSO devices and upload firmware to all of them. */ | |
296 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
297 | for (i = 0; devlist[i]; i++) { | |
298 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
299 | sr_err("Failed to get device descriptor: %s.", | |
300 | libusb_error_name(ret)); | |
301 | continue; | |
302 | } | |
303 | ||
304 | prof = NULL; | |
305 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
306 | if (des.idVendor == dev_profiles[j].orig_vid | |
307 | && des.idProduct == dev_profiles[j].orig_pid) { | |
308 | /* Device matches the pre-firmware profile. */ | |
309 | prof = &dev_profiles[j]; | |
310 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
311 | sdi = dso_dev_new(devcnt, prof); | |
312 | devices = g_slist_append(devices, sdi); | |
313 | devc = sdi->priv; | |
314 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
315 | prof->firmware) == SR_OK) | |
316 | /* Remember when the firmware on this device was updated */ | |
317 | devc->fw_updated = g_get_monotonic_time(); | |
318 | else | |
319 | sr_err("Firmware upload failed for " | |
320 | "device %d.", devcnt); | |
321 | /* Dummy USB address of 0xff will get overwritten later. */ | |
322 | devc->usb = sr_usb_dev_inst_new( | |
323 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
324 | devcnt++; | |
325 | break; | |
326 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
327 | && des.idProduct == dev_profiles[j].fw_pid) { | |
328 | /* Device matches the post-firmware profile. */ | |
329 | prof = &dev_profiles[j]; | |
330 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
331 | sdi = dso_dev_new(devcnt, prof); | |
332 | sdi->status = SR_ST_INACTIVE; | |
333 | devices = g_slist_append(devices, sdi); | |
334 | devc = sdi->priv; | |
335 | devc->usb = sr_usb_dev_inst_new( | |
336 | libusb_get_bus_number(devlist[i]), | |
337 | libusb_get_device_address(devlist[i]), NULL); | |
338 | devcnt++; | |
339 | break; | |
340 | } | |
341 | } | |
342 | if (!prof) | |
343 | /* not a supported VID/PID */ | |
344 | continue; | |
345 | } | |
346 | libusb_free_device_list(devlist, 1); | |
347 | ||
348 | return devices; | |
349 | } | |
350 | ||
351 | static GSList *hw_dev_list(void) | |
352 | { | |
353 | struct drv_context *drvc; | |
354 | ||
355 | drvc = di->priv; | |
356 | ||
357 | return drvc->instances; | |
358 | } | |
359 | ||
360 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
361 | { | |
362 | struct dev_context *devc; | |
363 | int64_t timediff_us, timediff_ms; | |
364 | int err; | |
365 | ||
366 | devc = sdi->priv; | |
367 | ||
368 | /* | |
369 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
370 | * for the FX2 to renumerate. | |
371 | */ | |
372 | err = SR_ERR; | |
373 | if (devc->fw_updated > 0) { | |
374 | sr_info("Waiting for device to reset."); | |
375 | /* Takes >= 300ms for the FX2 to be gone from the USB bus. */ | |
376 | g_usleep(300 * 1000); | |
377 | timediff_ms = 0; | |
378 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
379 | if ((err = dso_open(sdi)) == SR_OK) | |
380 | break; | |
381 | g_usleep(100 * 1000); | |
382 | timediff_us = g_get_monotonic_time() - devc->fw_updated; | |
383 | timediff_ms = timediff_us / 1000; | |
384 | sr_spew("Waited %" PRIi64 " ms.", timediff_ms); | |
385 | } | |
386 | sr_info("Device came back after %d ms.", timediff_ms); | |
387 | } else { | |
388 | err = dso_open(sdi); | |
389 | } | |
390 | ||
391 | if (err != SR_OK) { | |
392 | sr_err("Unable to open device."); | |
393 | return SR_ERR; | |
394 | } | |
395 | ||
396 | err = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE); | |
397 | if (err != 0) { | |
398 | sr_err("Unable to claim interface: %s.", | |
399 | libusb_error_name(err)); | |
400 | return SR_ERR; | |
401 | } | |
402 | ||
403 | return SR_OK; | |
404 | } | |
405 | ||
406 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
407 | { | |
408 | dso_close(sdi); | |
409 | ||
410 | return SR_OK; | |
411 | } | |
412 | ||
413 | static int hw_cleanup(void) | |
414 | { | |
415 | struct drv_context *drvc; | |
416 | ||
417 | if (!(drvc = di->priv)) | |
418 | return SR_OK; | |
419 | ||
420 | clear_instances(); | |
421 | ||
422 | return SR_OK; | |
423 | } | |
424 | ||
425 | static int config_get(int id, const void **data, const struct sr_dev_inst *sdi) | |
426 | { | |
427 | uint64_t tmp; | |
428 | ||
429 | (void)sdi; | |
430 | ||
431 | switch (id) { | |
432 | case SR_DI_HWCAPS: | |
433 | *data = hwcaps; | |
434 | break; | |
435 | case SR_DI_TIMEBASES: | |
436 | *data = timebases; | |
437 | break; | |
438 | case SR_DI_TRIGGER_SOURCES: | |
439 | *data = trigger_sources; | |
440 | break; | |
441 | case SR_DI_FILTERS: | |
442 | *data = filter_targets; | |
443 | break; | |
444 | case SR_DI_VDIVS: | |
445 | *data = vdivs; | |
446 | break; | |
447 | /* TODO remove this */ | |
448 | case SR_CONF_SAMPLERATE: | |
449 | *data = &tmp; | |
450 | break; | |
451 | default: | |
452 | return SR_ERR_ARG; | |
453 | } | |
454 | ||
455 | return SR_OK; | |
456 | } | |
457 | ||
458 | static int config_set(int id, const void *value, const struct sr_dev_inst *sdi) | |
459 | { | |
460 | struct dev_context *devc; | |
461 | struct sr_rational tmp_rat; | |
462 | float tmp_float; | |
463 | uint64_t tmp_u64; | |
464 | int ret, i; | |
465 | char **targets; | |
466 | ||
467 | if (sdi->status != SR_ST_ACTIVE) | |
468 | return SR_ERR; | |
469 | ||
470 | ret = SR_OK; | |
471 | devc = sdi->priv; | |
472 | switch (id) { | |
473 | case SR_CONF_LIMIT_FRAMES: | |
474 | devc->limit_frames = *(const uint64_t *)value; | |
475 | break; | |
476 | case SR_CONF_TRIGGER_SLOPE: | |
477 | tmp_u64 = *(const int *)value; | |
478 | if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE) | |
479 | ret = SR_ERR_ARG; | |
480 | devc->triggerslope = tmp_u64; | |
481 | break; | |
482 | case SR_CONF_HORIZ_TRIGGERPOS: | |
483 | tmp_float = *(const float *)value; | |
484 | if (tmp_float < 0.0 || tmp_float > 1.0) { | |
485 | sr_err("Trigger position should be between 0.0 and 1.0."); | |
486 | ret = SR_ERR_ARG; | |
487 | } else | |
488 | devc->triggerposition = tmp_float; | |
489 | break; | |
490 | case SR_CONF_BUFFERSIZE: | |
491 | tmp_u64 = *(const int *)value; | |
492 | for (i = 0; buffersizes[i]; i++) { | |
493 | if (buffersizes[i] == tmp_u64) { | |
494 | devc->framesize = tmp_u64; | |
495 | break; | |
496 | } | |
497 | } | |
498 | if (buffersizes[i] == 0) | |
499 | ret = SR_ERR_ARG; | |
500 | break; | |
501 | case SR_CONF_TIMEBASE: | |
502 | tmp_rat = *(const struct sr_rational *)value; | |
503 | for (i = 0; timebases[i].p && timebases[i].q; i++) { | |
504 | if (timebases[i].p == tmp_rat.p | |
505 | && timebases[i].q == tmp_rat.q) { | |
506 | devc->timebase = i; | |
507 | break; | |
508 | } | |
509 | } | |
510 | if (timebases[i].p == 0 && timebases[i].q == 0) | |
511 | ret = SR_ERR_ARG; | |
512 | break; | |
513 | case SR_CONF_TRIGGER_SOURCE: | |
514 | for (i = 0; trigger_sources[i]; i++) { | |
515 | if (!strcmp(value, trigger_sources[i])) { | |
516 | devc->triggersource = g_strdup(value); | |
517 | break; | |
518 | } | |
519 | } | |
520 | if (trigger_sources[i] == 0) | |
521 | ret = SR_ERR_ARG; | |
522 | break; | |
523 | case SR_CONF_FILTER: | |
524 | devc->filter_ch1 = devc->filter_ch2 = devc->filter_trigger = 0; | |
525 | targets = g_strsplit(value, ",", 0); | |
526 | for (i = 0; targets[i]; i++) { | |
527 | if (targets[i] == '\0') | |
528 | /* Empty filter string can be used to clear them all. */ | |
529 | ; | |
530 | else if (!strcmp(targets[i], "CH1")) | |
531 | devc->filter_ch1 = TRUE; | |
532 | else if (!strcmp(targets[i], "CH2")) | |
533 | devc->filter_ch2 = TRUE; | |
534 | else if (!strcmp(targets[i], "TRIGGER")) | |
535 | devc->filter_trigger = TRUE; | |
536 | else { | |
537 | sr_err("Invalid filter target %s.", targets[i]); | |
538 | ret = SR_ERR_ARG; | |
539 | } | |
540 | } | |
541 | g_strfreev(targets); | |
542 | break; | |
543 | case SR_CONF_VDIV: | |
544 | /* TODO: Not supporting vdiv per channel yet. */ | |
545 | tmp_rat = *(const struct sr_rational *)value; | |
546 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
547 | if (vdivs[i].p == tmp_rat.p | |
548 | && vdivs[i].q == tmp_rat.q) { | |
549 | devc->voltage_ch1 = i; | |
550 | devc->voltage_ch2 = i; | |
551 | break; | |
552 | } | |
553 | } | |
554 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
555 | ret = SR_ERR_ARG; | |
556 | break; | |
557 | case SR_CONF_COUPLING: | |
558 | /* TODO: Not supporting coupling per channel yet. */ | |
559 | for (i = 0; coupling[i]; i++) { | |
560 | if (!strcmp(value, coupling[i])) { | |
561 | devc->coupling_ch1 = i; | |
562 | devc->coupling_ch2 = i; | |
563 | break; | |
564 | } | |
565 | } | |
566 | if (coupling[i] == 0) | |
567 | ret = SR_ERR_ARG; | |
568 | break; | |
569 | default: | |
570 | ret = SR_ERR_ARG; | |
571 | break; | |
572 | } | |
573 | ||
574 | return ret; | |
575 | } | |
576 | ||
577 | static int config_list(int key, const void **data, const struct sr_dev_inst *sdi) | |
578 | { | |
579 | ||
580 | (void)sdi; | |
581 | ||
582 | switch (key) { | |
583 | case SR_CONF_BUFFERSIZE: | |
584 | *data = buffersizes; | |
585 | break; | |
586 | case SR_CONF_COUPLING: | |
587 | *data = coupling; | |
588 | break; | |
589 | default: | |
590 | return SR_ERR_ARG; | |
591 | } | |
592 | ||
593 | return SR_OK; | |
594 | } | |
595 | ||
596 | static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf, | |
597 | int num_samples) | |
598 | { | |
599 | struct sr_datafeed_packet packet; | |
600 | struct sr_datafeed_analog analog; | |
601 | struct dev_context *devc; | |
602 | float ch1, ch2, range; | |
603 | int num_probes, data_offset, i; | |
604 | ||
605 | devc = sdi->priv; | |
606 | num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1; | |
607 | packet.type = SR_DF_ANALOG; | |
608 | packet.payload = &analog; | |
609 | /* TODO: support for 5xxx series 9-bit samples */ | |
610 | analog.probes = devc->enabled_probes; | |
611 | analog.num_samples = num_samples; | |
612 | analog.mq = SR_MQ_VOLTAGE; | |
613 | analog.unit = SR_UNIT_VOLT; | |
614 | /* TODO: Check malloc return value. */ | |
615 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
616 | data_offset = 0; | |
617 | for (i = 0; i < analog.num_samples; i++) { | |
618 | /* | |
619 | * The device always sends data for both channels. If a channel | |
620 | * is disabled, it contains a copy of the enabled channel's | |
621 | * data. However, we only send the requested channels to | |
622 | * the bus. | |
623 | * | |
624 | * Voltage values are encoded as a value 0-255 (0-512 on the | |
625 | * DSO-5200*), where the value is a point in the range | |
626 | * represented by the vdiv setting. There are 8 vertical divs, | |
627 | * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V | |
628 | * and 255 = +2V. | |
629 | */ | |
630 | /* TODO: Support for DSO-5xxx series 9-bit samples. */ | |
631 | if (devc->ch1_enabled) { | |
632 | range = ((float)vdivs[devc->voltage_ch1].p / vdivs[devc->voltage_ch1].q) * 8; | |
633 | ch1 = range / 255 * *(buf + i * 2 + 1); | |
634 | /* Value is centered around 0V. */ | |
635 | ch1 -= range / 2; | |
636 | analog.data[data_offset++] = ch1; | |
637 | } | |
638 | if (devc->ch2_enabled) { | |
639 | range = ((float)vdivs[devc->voltage_ch2].p / vdivs[devc->voltage_ch2].q) * 8; | |
640 | ch2 = range / 255 * *(buf + i * 2); | |
641 | ch2 -= range / 2; | |
642 | analog.data[data_offset++] = ch2; | |
643 | } | |
644 | } | |
645 | sr_session_send(devc->cb_data, &packet); | |
646 | } | |
647 | ||
648 | /* | |
649 | * Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
650 | * Only channel data comes in asynchronously, and all transfers for this are | |
651 | * queued up beforehand, so this just needs to chuck the incoming data onto | |
652 | * the libsigrok session bus. | |
653 | */ | |
654 | static void receive_transfer(struct libusb_transfer *transfer) | |
655 | { | |
656 | struct sr_datafeed_packet packet; | |
657 | struct sr_dev_inst *sdi; | |
658 | struct dev_context *devc; | |
659 | int num_samples, pre; | |
660 | ||
661 | sdi = transfer->user_data; | |
662 | devc = sdi->priv; | |
663 | sr_dbg("receive_transfer(): status %d received %d bytes.", | |
664 | transfer->status, transfer->actual_length); | |
665 | ||
666 | if (transfer->actual_length == 0) | |
667 | /* Nothing to send to the bus. */ | |
668 | return; | |
669 | ||
670 | num_samples = transfer->actual_length / 2; | |
671 | ||
672 | sr_dbg("Got %d-%d/%d samples in frame.", devc->samp_received + 1, | |
673 | devc->samp_received + num_samples, devc->framesize); | |
674 | ||
675 | /* | |
676 | * The device always sends a full frame, but the beginning of the frame | |
677 | * doesn't represent the trigger point. The offset at which the trigger | |
678 | * happened came in with the capture state, so we need to start sending | |
679 | * from there up the session bus. The samples in the frame buffer | |
680 | * before that trigger point came after the end of the device's frame | |
681 | * buffer was reached, and it wrapped around to overwrite up until the | |
682 | * trigger point. | |
683 | */ | |
684 | if (devc->samp_received < devc->trigger_offset) { | |
685 | /* Trigger point not yet reached. */ | |
686 | if (devc->samp_received + num_samples < devc->trigger_offset) { | |
687 | /* The entire chunk is before the trigger point. */ | |
688 | memcpy(devc->framebuf + devc->samp_buffered * 2, | |
689 | transfer->buffer, num_samples * 2); | |
690 | devc->samp_buffered += num_samples; | |
691 | } else { | |
692 | /* | |
693 | * This chunk hits or overruns the trigger point. | |
694 | * Store the part before the trigger fired, and | |
695 | * send the rest up to the session bus. | |
696 | */ | |
697 | pre = devc->trigger_offset - devc->samp_received; | |
698 | memcpy(devc->framebuf + devc->samp_buffered * 2, | |
699 | transfer->buffer, pre * 2); | |
700 | devc->samp_buffered += pre; | |
701 | ||
702 | /* The rest of this chunk starts with the trigger point. */ | |
703 | sr_dbg("Reached trigger point, %d samples buffered.", | |
704 | devc->samp_buffered); | |
705 | ||
706 | /* Avoid the corner case where the chunk ended at | |
707 | * exactly the trigger point. */ | |
708 | if (num_samples > pre) | |
709 | send_chunk(sdi, transfer->buffer + pre * 2, | |
710 | num_samples - pre); | |
711 | } | |
712 | } else { | |
713 | /* Already past the trigger point, just send it all out. */ | |
714 | send_chunk(sdi, transfer->buffer, | |
715 | num_samples); | |
716 | } | |
717 | ||
718 | devc->samp_received += num_samples; | |
719 | ||
720 | /* Everything in this transfer was either copied to the buffer or | |
721 | * sent to the session bus. */ | |
722 | g_free(transfer->buffer); | |
723 | libusb_free_transfer(transfer); | |
724 | ||
725 | if (devc->samp_received >= devc->framesize) { | |
726 | /* That was the last chunk in this frame. Send the buffered | |
727 | * pre-trigger samples out now, in one big chunk. */ | |
728 | sr_dbg("End of frame, sending %d pre-trigger buffered samples.", | |
729 | devc->samp_buffered); | |
730 | send_chunk(sdi, devc->framebuf, devc->samp_buffered); | |
731 | ||
732 | /* Mark the end of this frame. */ | |
733 | packet.type = SR_DF_FRAME_END; | |
734 | sr_session_send(devc->cb_data, &packet); | |
735 | ||
736 | if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) { | |
737 | /* Terminate session */ | |
738 | devc->dev_state = STOPPING; | |
739 | } else { | |
740 | devc->dev_state = NEW_CAPTURE; | |
741 | } | |
742 | } | |
743 | } | |
744 | ||
745 | static int handle_event(int fd, int revents, void *cb_data) | |
746 | { | |
747 | const struct sr_dev_inst *sdi; | |
748 | struct sr_datafeed_packet packet; | |
749 | struct timeval tv; | |
750 | struct dev_context *devc; | |
751 | struct drv_context *drvc = di->priv; | |
752 | const struct libusb_pollfd **lupfd; | |
753 | int num_probes, i; | |
754 | uint32_t trigger_offset; | |
755 | uint8_t capturestate; | |
756 | ||
757 | (void)fd; | |
758 | (void)revents; | |
759 | ||
760 | sdi = cb_data; | |
761 | devc = sdi->priv; | |
762 | if (devc->dev_state == STOPPING) { | |
763 | /* We've been told to wind up the acquisition. */ | |
764 | sr_dbg("Stopping acquisition."); | |
765 | /* | |
766 | * TODO: Doesn't really cancel pending transfers so they might | |
767 | * come in after SR_DF_END is sent. | |
768 | */ | |
769 | lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx); | |
770 | for (i = 0; lupfd[i]; i++) | |
771 | sr_source_remove(lupfd[i]->fd); | |
772 | free(lupfd); | |
773 | ||
774 | packet.type = SR_DF_END; | |
775 | sr_session_send(sdi, &packet); | |
776 | ||
777 | devc->dev_state = IDLE; | |
778 | ||
779 | return TRUE; | |
780 | } | |
781 | ||
782 | /* Always handle pending libusb events. */ | |
783 | tv.tv_sec = tv.tv_usec = 0; | |
784 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
785 | ||
786 | /* TODO: ugh */ | |
787 | if (devc->dev_state == NEW_CAPTURE) { | |
788 | if (dso_capture_start(devc) != SR_OK) | |
789 | return TRUE; | |
790 | if (dso_enable_trigger(devc) != SR_OK) | |
791 | return TRUE; | |
792 | // if (dso_force_trigger(devc) != SR_OK) | |
793 | // return TRUE; | |
794 | sr_dbg("Successfully requested next chunk."); | |
795 | devc->dev_state = CAPTURE; | |
796 | return TRUE; | |
797 | } | |
798 | if (devc->dev_state != CAPTURE) | |
799 | return TRUE; | |
800 | ||
801 | if ((dso_get_capturestate(devc, &capturestate, &trigger_offset)) != SR_OK) | |
802 | return TRUE; | |
803 | ||
804 | sr_dbg("Capturestate %d.", capturestate); | |
805 | sr_dbg("Trigger offset 0x%.6x.", trigger_offset); | |
806 | switch (capturestate) { | |
807 | case CAPTURE_EMPTY: | |
808 | if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
809 | devc->capture_empty_count = 0; | |
810 | if (dso_capture_start(devc) != SR_OK) | |
811 | break; | |
812 | if (dso_enable_trigger(devc) != SR_OK) | |
813 | break; | |
814 | // if (dso_force_trigger(devc) != SR_OK) | |
815 | // break; | |
816 | sr_dbg("Successfully requested next chunk."); | |
817 | } | |
818 | break; | |
819 | case CAPTURE_FILLING: | |
820 | /* No data yet. */ | |
821 | break; | |
822 | case CAPTURE_READY_8BIT: | |
823 | /* Remember where in the captured frame the trigger is. */ | |
824 | devc->trigger_offset = trigger_offset; | |
825 | ||
826 | num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1; | |
827 | /* TODO: Check malloc return value. */ | |
828 | devc->framebuf = g_try_malloc(devc->framesize * num_probes * 2); | |
829 | devc->samp_buffered = devc->samp_received = 0; | |
830 | ||
831 | /* Tell the scope to send us the first frame. */ | |
832 | if (dso_get_channeldata(sdi, receive_transfer) != SR_OK) | |
833 | break; | |
834 | ||
835 | /* | |
836 | * Don't hit the state machine again until we're done fetching | |
837 | * the data we just told the scope to send. | |
838 | */ | |
839 | devc->dev_state = FETCH_DATA; | |
840 | ||
841 | /* Tell the frontend a new frame is on the way. */ | |
842 | packet.type = SR_DF_FRAME_BEGIN; | |
843 | sr_session_send(sdi, &packet); | |
844 | break; | |
845 | case CAPTURE_READY_9BIT: | |
846 | /* TODO */ | |
847 | sr_err("Not yet supported."); | |
848 | break; | |
849 | case CAPTURE_TIMEOUT: | |
850 | /* Doesn't matter, we'll try again next time. */ | |
851 | break; | |
852 | default: | |
853 | sr_dbg("Unknown capture state: %d.", capturestate); | |
854 | break; | |
855 | } | |
856 | ||
857 | return TRUE; | |
858 | } | |
859 | ||
860 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
861 | void *cb_data) | |
862 | { | |
863 | const struct libusb_pollfd **lupfd; | |
864 | struct sr_datafeed_packet packet; | |
865 | struct sr_datafeed_header header; | |
866 | struct dev_context *devc; | |
867 | struct drv_context *drvc = di->priv; | |
868 | int i; | |
869 | ||
870 | if (sdi->status != SR_ST_ACTIVE) | |
871 | return SR_ERR; | |
872 | ||
873 | devc = sdi->priv; | |
874 | devc->cb_data = cb_data; | |
875 | ||
876 | if (configure_probes(sdi) != SR_OK) { | |
877 | sr_err("Failed to configure probes."); | |
878 | return SR_ERR; | |
879 | } | |
880 | ||
881 | if (dso_init(devc) != SR_OK) | |
882 | return SR_ERR; | |
883 | ||
884 | if (dso_capture_start(devc) != SR_OK) | |
885 | return SR_ERR; | |
886 | ||
887 | devc->dev_state = CAPTURE; | |
888 | lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx); | |
889 | for (i = 0; lupfd[i]; i++) | |
890 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, | |
891 | handle_event, (void *)sdi); | |
892 | free(lupfd); | |
893 | ||
894 | /* Send header packet to the session bus. */ | |
895 | packet.type = SR_DF_HEADER; | |
896 | packet.payload = (unsigned char *)&header; | |
897 | header.feed_version = 1; | |
898 | gettimeofday(&header.starttime, NULL); | |
899 | sr_session_send(cb_data, &packet); | |
900 | ||
901 | return SR_OK; | |
902 | } | |
903 | ||
904 | static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) | |
905 | { | |
906 | struct dev_context *devc; | |
907 | ||
908 | (void)cb_data; | |
909 | ||
910 | if (sdi->status != SR_ST_ACTIVE) | |
911 | return SR_ERR; | |
912 | ||
913 | devc = sdi->priv; | |
914 | devc->dev_state = STOPPING; | |
915 | ||
916 | return SR_OK; | |
917 | } | |
918 | ||
919 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info = { | |
920 | .name = "hantek-dso", | |
921 | .longname = "Hantek DSO", | |
922 | .api_version = 1, | |
923 | .init = hw_init, | |
924 | .cleanup = hw_cleanup, | |
925 | .scan = hw_scan, | |
926 | .dev_list = hw_dev_list, | |
927 | .dev_clear = clear_instances, | |
928 | .config_get = config_get, | |
929 | .config_set = config_set, | |
930 | .config_list = config_list, | |
931 | .dev_open = hw_dev_open, | |
932 | .dev_close = hw_dev_close, | |
933 | .dev_acquisition_start = hw_dev_acquisition_start, | |
934 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
935 | .priv = NULL, | |
936 | }; |