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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 struct sr_dev_driver hantek_dso_driver_info; | |
148 | static struct sr_dev_driver *hdi = &hantek_dso_driver_info; | |
149 | static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, | |
150 | void *cb_data); | |
151 | ||
152 | static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof) | |
153 | { | |
154 | struct sr_dev_inst *sdi; | |
155 | struct sr_probe *probe; | |
156 | struct drv_context *drvc; | |
157 | struct dev_context *devc; | |
158 | int i; | |
159 | ||
160 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
161 | prof->vendor, prof->model, NULL); | |
162 | if (!sdi) | |
163 | return NULL; | |
164 | sdi->driver = hdi; | |
165 | ||
166 | /* Add only the real probes -- EXT isn't a source of data, only | |
167 | * a trigger source internal to the device. | |
168 | */ | |
169 | for (i = 0; probe_names[i]; i++) { | |
170 | if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, | |
171 | probe_names[i]))) | |
172 | return NULL; | |
173 | sdi->probes = g_slist_append(sdi->probes, probe); | |
174 | } | |
175 | ||
176 | if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { | |
177 | sr_err("hantek-dso: devc malloc failed"); | |
178 | return NULL; | |
179 | } | |
180 | devc->profile = prof; | |
181 | devc->dev_state = IDLE; | |
182 | devc->timebase = DEFAULT_TIMEBASE; | |
183 | devc->ch1_enabled = TRUE; | |
184 | devc->ch2_enabled = TRUE; | |
185 | devc->voltage_ch1 = DEFAULT_VOLTAGE; | |
186 | devc->voltage_ch2 = DEFAULT_VOLTAGE; | |
187 | devc->coupling_ch1 = DEFAULT_COUPLING; | |
188 | devc->coupling_ch2 = DEFAULT_COUPLING; | |
189 | devc->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
190 | devc->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
191 | devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
192 | devc->framesize = DEFAULT_FRAMESIZE; | |
193 | devc->triggerslope = SLOPE_POSITIVE; | |
194 | devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE); | |
195 | devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
196 | sdi->priv = devc; | |
197 | drvc = hdi->priv; | |
198 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
199 | ||
200 | return sdi; | |
201 | } | |
202 | ||
203 | static int configure_probes(const struct sr_dev_inst *sdi) | |
204 | { | |
205 | struct dev_context *devc; | |
206 | const struct sr_probe *probe; | |
207 | const GSList *l; | |
208 | ||
209 | devc = sdi->priv; | |
210 | ||
211 | devc->ch1_enabled = devc->ch2_enabled = FALSE; | |
212 | for (l = sdi->probes; l; l = l->next) { | |
213 | probe = (struct sr_probe *)l->data; | |
214 | if (probe->index == 0) | |
215 | devc->ch1_enabled = probe->enabled; | |
216 | else if (probe->index == 1) | |
217 | devc->ch2_enabled = probe->enabled; | |
218 | } | |
219 | ||
220 | return SR_OK; | |
221 | } | |
222 | ||
223 | /* Properly close and free all devices. */ | |
224 | static void clear_instances(void) | |
225 | { | |
226 | struct sr_dev_inst *sdi; | |
227 | struct drv_context *drvc; | |
228 | struct dev_context *devc; | |
229 | GSList *l; | |
230 | ||
231 | drvc = hdi->priv; | |
232 | for (l = drvc->instances; l; l = l->next) { | |
233 | if (!(sdi = l->data)) { | |
234 | /* Log error, but continue cleaning up the rest. */ | |
235 | sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__); | |
236 | continue; | |
237 | } | |
238 | if (!(devc = sdi->priv)) { | |
239 | /* Log error, but continue cleaning up the rest. */ | |
240 | sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__); | |
241 | continue; | |
242 | } | |
243 | dso_close(sdi); | |
244 | sr_usb_dev_inst_free(devc->usb); | |
245 | g_free(devc->triggersource); | |
246 | ||
247 | sr_dev_inst_free(sdi); | |
248 | } | |
249 | ||
250 | g_slist_free(drvc->instances); | |
251 | drvc->instances = NULL; | |
252 | ||
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; | |
262 | } | |
263 | ||
264 | if (libusb_init(&drvc->usb_context) != 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(drvc->usb_context, &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 int hw_dev_open(struct sr_dev_inst *sdi) | |
350 | { | |
351 | struct dev_context *devc; | |
352 | int64_t timediff_us, timediff_ms; | |
353 | int err; | |
354 | ||
355 | devc = sdi->priv; | |
356 | ||
357 | /* | |
358 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
359 | * for the FX2 to renumerate | |
360 | */ | |
361 | err = SR_ERR; | |
362 | if (devc->fw_updated > 0) { | |
363 | sr_info("hantek-dso: waiting for device to reset"); | |
364 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
365 | g_usleep(300 * 1000); | |
366 | timediff_ms = 0; | |
367 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
368 | if ((err = dso_open(sdi)) == SR_OK) | |
369 | break; | |
370 | g_usleep(100 * 1000); | |
371 | timediff_us = g_get_monotonic_time() - devc->fw_updated; | |
372 | timediff_ms = timediff_us / 1000; | |
373 | sr_spew("hantek-dso: waited %" PRIi64 " ms", timediff_ms); | |
374 | } | |
375 | sr_info("hantek-dso: device came back after %d ms", timediff_ms); | |
376 | } else { | |
377 | err = dso_open(sdi); | |
378 | } | |
379 | ||
380 | if (err != SR_OK) { | |
381 | sr_err("hantek-dso: unable to open device"); | |
382 | return SR_ERR; | |
383 | } | |
384 | ||
385 | err = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE); | |
386 | if (err != 0) { | |
387 | sr_err("hantek-dso: Unable to claim interface: %d", err); | |
388 | return SR_ERR; | |
389 | } | |
390 | ||
391 | return SR_OK; | |
392 | } | |
393 | ||
394 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
395 | { | |
396 | ||
397 | dso_close(sdi); | |
398 | ||
399 | return SR_OK; | |
400 | } | |
401 | ||
402 | static int hw_cleanup(void) | |
403 | { | |
404 | struct drv_context *drvc; | |
405 | ||
406 | if (!(drvc = hdi->priv)) | |
407 | return SR_OK; | |
408 | ||
409 | clear_instances(); | |
410 | ||
411 | if (drvc->usb_context) | |
412 | libusb_exit(drvc->usb_context); | |
413 | drvc->usb_context = NULL; | |
414 | ||
415 | return SR_OK; | |
416 | } | |
417 | ||
418 | static int hw_info_get(int info_id, const void **data, | |
419 | const struct sr_dev_inst *sdi) | |
420 | { | |
421 | uint64_t tmp; | |
422 | ||
423 | (void)sdi; | |
424 | ||
425 | switch (info_id) { | |
426 | case SR_DI_HWCAPS: | |
427 | *data = hwcaps; | |
428 | break; | |
429 | case SR_DI_NUM_PROBES: | |
430 | *data = GINT_TO_POINTER(NUM_PROBES); | |
431 | break; | |
432 | case SR_DI_PROBE_NAMES: | |
433 | *data = probe_names; | |
434 | break; | |
435 | case SR_DI_BUFFERSIZES: | |
436 | *data = buffersizes; | |
437 | break; | |
438 | case SR_DI_TIMEBASES: | |
439 | *data = timebases; | |
440 | break; | |
441 | case SR_DI_TRIGGER_SOURCES: | |
442 | *data = trigger_sources; | |
443 | break; | |
444 | case SR_DI_FILTERS: | |
445 | *data = filter_targets; | |
446 | break; | |
447 | case SR_DI_VDIVS: | |
448 | *data = vdivs; | |
449 | break; | |
450 | case SR_DI_COUPLING: | |
451 | *data = coupling; | |
452 | break; | |
453 | /* TODO remove this */ | |
454 | case SR_DI_CUR_SAMPLERATE: | |
455 | *data = &tmp; | |
456 | break; | |
457 | default: | |
458 | return SR_ERR_ARG; | |
459 | } | |
460 | ||
461 | return SR_OK; | |
462 | } | |
463 | ||
464 | static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap, | |
465 | const void *value) | |
466 | { | |
467 | struct dev_context *devc; | |
468 | struct sr_rational tmp_rat; | |
469 | float tmp_float; | |
470 | uint64_t tmp_u64; | |
471 | int ret, i; | |
472 | char **targets; | |
473 | ||
474 | if (sdi->status != SR_ST_ACTIVE) | |
475 | return SR_ERR; | |
476 | ||
477 | ret = SR_OK; | |
478 | devc = sdi->priv; | |
479 | switch (hwcap) { | |
480 | case SR_HWCAP_LIMIT_FRAMES: | |
481 | devc->limit_frames = *(const uint64_t *)value; | |
482 | break; | |
483 | case SR_HWCAP_TRIGGER_SLOPE: | |
484 | tmp_u64 = *(const int *)value; | |
485 | if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE) | |
486 | ret = SR_ERR_ARG; | |
487 | devc->triggerslope = tmp_u64; | |
488 | break; | |
489 | case SR_HWCAP_HORIZ_TRIGGERPOS: | |
490 | tmp_float = *(const float *)value; | |
491 | if (tmp_float < 0.0 || tmp_float > 1.0) { | |
492 | sr_err("hantek-dso: trigger position should be between 0.0 and 1.0"); | |
493 | ret = SR_ERR_ARG; | |
494 | } else | |
495 | devc->triggerposition = tmp_float; | |
496 | break; | |
497 | case SR_HWCAP_BUFFERSIZE: | |
498 | tmp_u64 = *(const int *)value; | |
499 | for (i = 0; buffersizes[i]; i++) { | |
500 | if (buffersizes[i] == tmp_u64) { | |
501 | devc->framesize = tmp_u64; | |
502 | break; | |
503 | } | |
504 | } | |
505 | if (buffersizes[i] == 0) | |
506 | ret = SR_ERR_ARG; | |
507 | break; | |
508 | case SR_HWCAP_TIMEBASE: | |
509 | tmp_rat = *(const struct sr_rational *)value; | |
510 | for (i = 0; timebases[i].p && timebases[i].q; i++) { | |
511 | if (timebases[i].p == tmp_rat.p | |
512 | && timebases[i].q == tmp_rat.q) { | |
513 | devc->timebase = i; | |
514 | break; | |
515 | } | |
516 | } | |
517 | if (timebases[i].p == 0 && timebases[i].q == 0) | |
518 | ret = SR_ERR_ARG; | |
519 | break; | |
520 | case SR_HWCAP_TRIGGER_SOURCE: | |
521 | for (i = 0; trigger_sources[i]; i++) { | |
522 | if (!strcmp(value, trigger_sources[i])) { | |
523 | devc->triggersource = g_strdup(value); | |
524 | break; | |
525 | } | |
526 | } | |
527 | if (trigger_sources[i] == 0) | |
528 | ret = SR_ERR_ARG; | |
529 | break; | |
530 | case SR_HWCAP_FILTER: | |
531 | devc->filter_ch1 = devc->filter_ch2 = devc->filter_trigger = 0; | |
532 | targets = g_strsplit(value, ",", 0); | |
533 | for (i = 0; targets[i]; i++) { | |
534 | if (targets[i] == '\0') | |
535 | /* Empty filter string can be used to clear them all. */ | |
536 | ; | |
537 | else if (!strcmp(targets[i], "CH1")) | |
538 | devc->filter_ch1 = TRUE; | |
539 | else if (!strcmp(targets[i], "CH2")) | |
540 | devc->filter_ch2 = TRUE; | |
541 | else if (!strcmp(targets[i], "TRIGGER")) | |
542 | devc->filter_trigger = TRUE; | |
543 | else { | |
544 | sr_err("invalid filter target %s", targets[i]); | |
545 | ret = SR_ERR_ARG; | |
546 | } | |
547 | } | |
548 | g_strfreev(targets); | |
549 | break; | |
550 | case SR_HWCAP_VDIV: | |
551 | /* TODO not supporting vdiv per channel yet */ | |
552 | tmp_rat = *(const struct sr_rational *)value; | |
553 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
554 | if (vdivs[i].p == tmp_rat.p | |
555 | && vdivs[i].q == tmp_rat.q) { | |
556 | devc->voltage_ch1 = i; | |
557 | devc->voltage_ch2 = i; | |
558 | break; | |
559 | } | |
560 | } | |
561 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
562 | ret = SR_ERR_ARG; | |
563 | break; | |
564 | case SR_HWCAP_COUPLING: | |
565 | /* TODO not supporting coupling per channel yet */ | |
566 | for (i = 0; coupling[i]; i++) { | |
567 | if (!strcmp(value, coupling[i])) { | |
568 | devc->coupling_ch1 = i; | |
569 | devc->coupling_ch2 = i; | |
570 | break; | |
571 | } | |
572 | } | |
573 | if (coupling[i] == 0) | |
574 | ret = SR_ERR_ARG; | |
575 | break; | |
576 | default: | |
577 | ret = SR_ERR_ARG; | |
578 | } | |
579 | ||
580 | return ret; | |
581 | } | |
582 | ||
583 | static void send_chunk(struct dev_context *devc, unsigned char *buf, | |
584 | int num_samples) | |
585 | { | |
586 | struct sr_datafeed_packet packet; | |
587 | struct sr_datafeed_analog analog; | |
588 | float ch1, ch2, range; | |
589 | int num_probes, data_offset, i; | |
590 | ||
591 | num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1; | |
592 | packet.type = SR_DF_ANALOG; | |
593 | packet.payload = &analog; | |
594 | /* TODO: support for 5xxx series 9-bit samples */ | |
595 | analog.num_samples = num_samples; | |
596 | analog.mq = SR_MQ_VOLTAGE; | |
597 | analog.unit = SR_UNIT_VOLT; | |
598 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
599 | data_offset = 0; | |
600 | for (i = 0; i < analog.num_samples; i++) { | |
601 | /* The device always sends data for both channels. If a channel | |
602 | * is disabled, it contains a copy of the enabled channel's | |
603 | * data. However, we only send the requested channels to the bus. | |
604 | * | |
605 | * Voltage values are encoded as a value 0-255 (0-512 on the 5200*), | |
606 | * where the value is a point in the range represented by the vdiv | |
607 | * setting. There are 8 vertical divs, so e.g. 500mV/div represents | |
608 | * 4V peak-to-peak where 0 = -2V and 255 = +2V. | |
609 | */ | |
610 | /* TODO: support for 5xxx series 9-bit samples */ | |
611 | if (devc->ch1_enabled) { | |
612 | range = ((float)vdivs[devc->voltage_ch1].p / vdivs[devc->voltage_ch1].q) * 8; | |
613 | ch1 = range / 255 * *(buf + i * 2 + 1); | |
614 | /* Value is centered around 0V. */ | |
615 | ch1 -= range / 2; | |
616 | analog.data[data_offset++] = ch1; | |
617 | } | |
618 | if (devc->ch2_enabled) { | |
619 | range = ((float)vdivs[devc->voltage_ch2].p / vdivs[devc->voltage_ch2].q) * 8; | |
620 | ch2 = range / 255 * *(buf + i * 2); | |
621 | ch2 -= range / 2; | |
622 | analog.data[data_offset++] = ch2; | |
623 | } | |
624 | } | |
625 | sr_session_send(devc->cb_data, &packet); | |
626 | ||
627 | } | |
628 | ||
629 | /* Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
630 | * Only channel data comes in asynchronously, and all transfers for this are | |
631 | * queued up beforehand, so this just needs so chuck the incoming data onto | |
632 | * the libsigrok session bus. | |
633 | */ | |
634 | static void receive_transfer(struct libusb_transfer *transfer) | |
635 | { | |
636 | struct sr_datafeed_packet packet; | |
637 | struct dev_context *devc; | |
638 | int num_samples, pre; | |
639 | ||
640 | devc = transfer->user_data; | |
641 | sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes", | |
642 | transfer->status, transfer->actual_length); | |
643 | ||
644 | if (transfer->actual_length == 0) | |
645 | /* Nothing to send to the bus. */ | |
646 | return; | |
647 | ||
648 | num_samples = transfer->actual_length / 2; | |
649 | ||
650 | sr_dbg("hantek-dso: got %d-%d/%d samples in frame", devc->samp_received + 1, | |
651 | devc->samp_received + num_samples, devc->framesize); | |
652 | ||
653 | /* The device always sends a full frame, but the beginning of the frame | |
654 | * doesn't represent the trigger point. The offset at which the trigger | |
655 | * happened came in with the capture state, so we need to start sending | |
656 | * from there up the session bus. The samples in the frame buffer before | |
657 | * that trigger point came after the end of the device's frame buffer was | |
658 | * reached, and it wrapped around to overwrite up until the trigger point. | |
659 | */ | |
660 | if (devc->samp_received < devc->trigger_offset) { | |
661 | /* Trigger point not yet reached. */ | |
662 | if (devc->samp_received + num_samples < devc->trigger_offset) { | |
663 | /* The entire chunk is before the trigger point. */ | |
664 | memcpy(devc->framebuf + devc->samp_buffered * 2, | |
665 | transfer->buffer, num_samples * 2); | |
666 | devc->samp_buffered += num_samples; | |
667 | } else { | |
668 | /* This chunk hits or overruns the trigger point. | |
669 | * Store the part before the trigger fired, and | |
670 | * send the rest up to the session bus. */ | |
671 | pre = devc->trigger_offset - devc->samp_received; | |
672 | memcpy(devc->framebuf + devc->samp_buffered * 2, | |
673 | transfer->buffer, pre * 2); | |
674 | devc->samp_buffered += pre; | |
675 | ||
676 | /* The rest of this chunk starts with the trigger point. */ | |
677 | sr_dbg("hantek-dso: reached trigger point, %d samples buffered", | |
678 | devc->samp_buffered); | |
679 | ||
680 | /* Avoid the corner case where the chunk ended at | |
681 | * exactly the trigger point. */ | |
682 | if (num_samples > pre) | |
683 | send_chunk(devc, transfer->buffer + pre * 2, | |
684 | num_samples - pre); | |
685 | } | |
686 | } else { | |
687 | /* Already past the trigger point, just send it all out. */ | |
688 | send_chunk(devc, transfer->buffer, | |
689 | num_samples); | |
690 | } | |
691 | ||
692 | devc->samp_received += num_samples; | |
693 | ||
694 | /* Everything in this transfer was either copied to the buffer or | |
695 | * sent to the session bus. */ | |
696 | g_free(transfer->buffer); | |
697 | libusb_free_transfer(transfer); | |
698 | ||
699 | if (devc->samp_received >= devc->framesize) { | |
700 | /* That was the last chunk in this frame. Send the buffered | |
701 | * pre-trigger samples out now, in one big chunk. */ | |
702 | sr_dbg("hantek-dso: end of frame, sending %d pre-trigger buffered samples", | |
703 | devc->samp_buffered); | |
704 | send_chunk(devc, devc->framebuf, devc->samp_buffered); | |
705 | ||
706 | /* Mark the end of this frame. */ | |
707 | packet.type = SR_DF_FRAME_END; | |
708 | sr_session_send(devc->cb_data, &packet); | |
709 | ||
710 | if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) { | |
711 | /* Terminate session */ | |
712 | devc->dev_state = STOPPING; | |
713 | } else { | |
714 | devc->dev_state = NEW_CAPTURE; | |
715 | } | |
716 | } | |
717 | ||
718 | } | |
719 | ||
720 | static int handle_event(int fd, int revents, void *cb_data) | |
721 | { | |
722 | const struct sr_dev_inst *sdi; | |
723 | struct sr_datafeed_packet packet; | |
724 | struct timeval tv; | |
725 | struct drv_context *drvc; | |
726 | struct dev_context *devc; | |
727 | const struct libusb_pollfd **lupfd; | |
728 | int num_probes, i; | |
729 | uint32_t trigger_offset; | |
730 | uint8_t capturestate; | |
731 | ||
732 | /* Avoid compiler warnings. */ | |
733 | (void)fd; | |
734 | (void)revents; | |
735 | ||
736 | drvc = hdi->priv; | |
737 | sdi = cb_data; | |
738 | devc = sdi->priv; | |
739 | if (devc->dev_state == STOPPING) { | |
740 | /* We've been told to wind up the acquisition. */ | |
741 | sr_dbg("hantek-dso: stopping acquisition"); | |
742 | /* TODO: doesn't really cancel pending transfers so they might | |
743 | * come in after SR_DF_END is sent. */ | |
744 | lupfd = libusb_get_pollfds(drvc->usb_context); | |
745 | for (i = 0; lupfd[i]; i++) | |
746 | sr_source_remove(lupfd[i]->fd); | |
747 | free(lupfd); | |
748 | ||
749 | packet.type = SR_DF_END; | |
750 | sr_session_send(sdi, &packet); | |
751 | ||
752 | devc->dev_state = IDLE; | |
753 | ||
754 | return TRUE; | |
755 | } | |
756 | ||
757 | /* Always handle pending libusb events. */ | |
758 | tv.tv_sec = tv.tv_usec = 0; | |
759 | libusb_handle_events_timeout(drvc->usb_context, &tv); | |
760 | ||
761 | /* TODO: ugh */ | |
762 | if (devc->dev_state == NEW_CAPTURE) { | |
763 | if (dso_capture_start(devc) != SR_OK) | |
764 | return TRUE; | |
765 | if (dso_enable_trigger(devc) != SR_OK) | |
766 | return TRUE; | |
767 | // if (dso_force_trigger(devc) != SR_OK) | |
768 | // return TRUE; | |
769 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
770 | devc->dev_state = CAPTURE; | |
771 | return TRUE; | |
772 | } | |
773 | if (devc->dev_state != CAPTURE) | |
774 | return TRUE; | |
775 | ||
776 | if ((dso_get_capturestate(devc, &capturestate, &trigger_offset)) != SR_OK) | |
777 | return TRUE; | |
778 | ||
779 | sr_dbg("hantek-dso: capturestate %d", capturestate); | |
780 | sr_dbg("hantek-dso: trigger offset 0x%.6x", trigger_offset); | |
781 | switch (capturestate) { | |
782 | case CAPTURE_EMPTY: | |
783 | if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
784 | devc->capture_empty_count = 0; | |
785 | if (dso_capture_start(devc) != SR_OK) | |
786 | break; | |
787 | if (dso_enable_trigger(devc) != SR_OK) | |
788 | break; | |
789 | // if (dso_force_trigger(devc) != SR_OK) | |
790 | // break; | |
791 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
792 | } | |
793 | break; | |
794 | case CAPTURE_FILLING: | |
795 | /* no data yet */ | |
796 | break; | |
797 | case CAPTURE_READY_8BIT: | |
798 | /* Remember where in the captured frame the trigger is. */ | |
799 | devc->trigger_offset = trigger_offset; | |
800 | ||
801 | num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1; | |
802 | devc->framebuf = g_try_malloc(devc->framesize * num_probes * 2); | |
803 | devc->samp_buffered = devc->samp_received = 0; | |
804 | ||
805 | /* Tell the scope to send us the first frame. */ | |
806 | if (dso_get_channeldata(devc, receive_transfer) != SR_OK) | |
807 | break; | |
808 | ||
809 | /* Don't hit the state machine again until we're done fetching | |
810 | * the data we just told the scope to send. | |
811 | */ | |
812 | devc->dev_state = FETCH_DATA; | |
813 | ||
814 | /* Tell the frontend a new frame is on the way. */ | |
815 | packet.type = SR_DF_FRAME_BEGIN; | |
816 | sr_session_send(sdi, &packet); | |
817 | break; | |
818 | case CAPTURE_READY_9BIT: | |
819 | /* TODO */ | |
820 | sr_err("not yet supported"); | |
821 | break; | |
822 | case CAPTURE_TIMEOUT: | |
823 | /* Doesn't matter, we'll try again next time. */ | |
824 | break; | |
825 | default: | |
826 | sr_dbg("unknown capture state"); | |
827 | } | |
828 | ||
829 | return TRUE; | |
830 | } | |
831 | ||
832 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
833 | void *cb_data) | |
834 | { | |
835 | const struct libusb_pollfd **lupfd; | |
836 | struct sr_datafeed_packet packet; | |
837 | struct sr_datafeed_header header; | |
838 | struct sr_datafeed_meta_analog meta; | |
839 | struct drv_context *drvc; | |
840 | struct dev_context *devc; | |
841 | int i; | |
842 | ||
843 | drvc = hdi->priv; | |
844 | if (sdi->status != SR_ST_ACTIVE) | |
845 | return SR_ERR; | |
846 | ||
847 | devc = sdi->priv; | |
848 | devc->cb_data = cb_data; | |
849 | ||
850 | if (configure_probes(sdi) != SR_OK) { | |
851 | sr_err("hantek-dso: failed to configured probes"); | |
852 | return SR_ERR; | |
853 | } | |
854 | ||
855 | if (dso_init(devc) != SR_OK) | |
856 | return SR_ERR; | |
857 | ||
858 | if (dso_capture_start(devc) != SR_OK) | |
859 | return SR_ERR; | |
860 | ||
861 | devc->dev_state = CAPTURE; | |
862 | lupfd = libusb_get_pollfds(drvc->usb_context); | |
863 | for (i = 0; lupfd[i]; i++) | |
864 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event, | |
865 | (void *)sdi); | |
866 | free(lupfd); | |
867 | ||
868 | /* Send header packet to the session bus. */ | |
869 | packet.type = SR_DF_HEADER; | |
870 | packet.payload = (unsigned char *)&header; | |
871 | header.feed_version = 1; | |
872 | gettimeofday(&header.starttime, NULL); | |
873 | sr_session_send(cb_data, &packet); | |
874 | ||
875 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
876 | packet.type = SR_DF_META_ANALOG; | |
877 | packet.payload = &meta; | |
878 | meta.num_probes = NUM_PROBES; | |
879 | sr_session_send(cb_data, &packet); | |
880 | ||
881 | return SR_OK; | |
882 | } | |
883 | ||
884 | static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, | |
885 | void *cb_data) | |
886 | { | |
887 | struct dev_context *devc; | |
888 | ||
889 | (void)cb_data; | |
890 | ||
891 | if (sdi->status != SR_ST_ACTIVE) | |
892 | return SR_ERR; | |
893 | ||
894 | devc = sdi->priv; | |
895 | devc->dev_state = STOPPING; | |
896 | ||
897 | return SR_OK; | |
898 | } | |
899 | ||
900 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info = { | |
901 | .name = "hantek-dso", | |
902 | .longname = "Hantek DSO", | |
903 | .api_version = 1, | |
904 | .init = hw_init, | |
905 | .cleanup = hw_cleanup, | |
906 | .scan = hw_scan, | |
907 | .dev_open = hw_dev_open, | |
908 | .dev_close = hw_dev_close, | |
909 | .info_get = hw_info_get, | |
910 | .dev_config_set = hw_dev_config_set, | |
911 | .dev_acquisition_start = hw_dev_acquisition_start, | |
912 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
913 | .priv = NULL, | |
914 | }; |