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