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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 * With protocol information from the hantekdso project,
6 * Copyright (C) 2008 Oleg Khudyakov <prcoder@gmail.com>
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#include "libsigrok.h"
23#include "libsigrok-internal.h"
24#include "dso.h"
25#include <string.h>
26#include <glib.h>
27#include <libusb.h>
28
29extern struct sr_dev_driver hantek_dso_driver_info;
30
31
32static int send_begin(struct dev_context *devc)
33{
34 int ret;
35 unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe,
36 0x00, 0x01, 0x00};
37
38 sr_dbg("hantek-dso: sending CTRL_BEGINCOMMAND");
39
40 if ((ret = libusb_control_transfer(devc->usb->devhdl,
41 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_BEGINCOMMAND,
42 0, 0, buffer, sizeof(buffer), 200)) != sizeof(buffer)) {
43 sr_err("failed to send begincommand: %d", ret);
44 return SR_ERR;
45 }
46
47 return SR_OK;
48}
49
50static int send_bulkcmd(struct dev_context *devc, uint8_t *cmdstring, int cmdlen)
51{
52 int ret, tmp;
53
54 if (send_begin(devc) != SR_OK)
55 return SR_ERR;
56
57 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
58 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
59 cmdstring, cmdlen, &tmp, 200)) != 0)
60 return SR_ERR;
61
62 return SR_OK;
63}
64
65SR_PRIV int dso_getmps(libusb_device *dev)
66{
67 struct libusb_device_descriptor des;
68 struct libusb_config_descriptor *conf_dsc;
69 const struct libusb_interface_descriptor *intf_dsc;
70 int mps;
71
72 if (libusb_get_device_descriptor(dev, &des) != 0)
73 return 0;
74
75 if (des.bNumConfigurations != 1)
76 return 0;
77
78 if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
79 return 0;
80
81 mps = 0;
82 intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
83 if (intf_dsc->bNumEndpoints != 2)
84 goto err;
85
86 if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) !=
87 (2 | LIBUSB_ENDPOINT_OUT))
88 /* The first endpoint should be 2 (outbound). */
89 goto err;
90
91 if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) !=
92 (6 | LIBUSB_ENDPOINT_IN))
93 /* The second endpoint should be 6 (inbound). */
94 goto err;
95
96 mps = intf_dsc->endpoint[1].wMaxPacketSize;
97
98err:
99 if (conf_dsc)
100 libusb_free_config_descriptor(conf_dsc);
101
102 return mps;
103}
104
105SR_PRIV int dso_open(struct sr_dev_inst *sdi)
106{
107 libusb_device **devlist;
108 struct libusb_device_descriptor des;
109 struct dev_context *devc;
110 int err, skip, i;
111
112 devc = sdi->priv;
113
114 if (sdi->status == SR_ST_ACTIVE)
115 /* already in use */
116 return SR_ERR;
117
118 skip = 0;
119 libusb_get_device_list(NULL, &devlist);
120 for (i = 0; devlist[i]; i++) {
121 if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
122 sr_err("hantek-dso: failed to get device descriptor: %d", err);
123 continue;
124 }
125
126 if (des.idVendor != devc->profile->fw_vid
127 || des.idProduct != devc->profile->fw_pid)
128 continue;
129
130 if (sdi->status == SR_ST_INITIALIZING) {
131 if (skip != sdi->index) {
132 /* Skip devices of this type that aren't the one we want. */
133 skip += 1;
134 continue;
135 }
136 } else if (sdi->status == SR_ST_INACTIVE) {
137 /*
138 * This device is fully enumerated, so we need to find
139 * this device by vendor, product, bus and address.
140 */
141 if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
142 || libusb_get_device_address(devlist[i]) != devc->usb->address)
143 /* this is not the one */
144 continue;
145 }
146
147 if (!(err = libusb_open(devlist[i], &devc->usb->devhdl))) {
148 if (devc->usb->address == 0xff)
149 /*
150 * first time we touch this device after firmware upload,
151 * so we don't know the address yet.
152 */
153 devc->usb->address = libusb_get_device_address(devlist[i]);
154
155 if(!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
156 sr_err("hantek-dso: wrong endpoint profile");
157 else {
158 sdi->status = SR_ST_ACTIVE;
159 sr_info("hantek-dso: opened device %d on %d.%d interface %d",
160 sdi->index, devc->usb->bus,
161 devc->usb->address, USB_INTERFACE);
162 }
163 } else {
164 sr_err("hantek-dso: failed to open device: %d", err);
165 }
166
167 /* if we made it here, we handled the device one way or another */
168 break;
169 }
170 libusb_free_device_list(devlist, 1);
171
172 if (sdi->status != SR_ST_ACTIVE)
173 return SR_ERR;
174
175 return SR_OK;
176}
177
178SR_PRIV void dso_close(struct sr_dev_inst *sdi)
179{
180 struct dev_context *devc;
181
182 devc = sdi->priv;
183
184 if (devc->usb->devhdl == NULL)
185 return;
186
187 sr_info("hantek-dso: closing device %d on %d.%d interface %d", sdi->index,
188 devc->usb->bus, devc->usb->address, USB_INTERFACE);
189 libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
190 libusb_close(devc->usb->devhdl);
191 devc->usb->devhdl = NULL;
192 sdi->status = SR_ST_INACTIVE;
193
194}
195
196static int get_channel_offsets(struct dev_context *devc)
197{
198 GString *gs;
199 int chan, v, ret;
200
201 sr_dbg("hantek-dso: getting channel offsets");
202
203 ret = libusb_control_transfer(devc->usb->devhdl,
204 LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
205 CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
206 (unsigned char *)&devc->channel_levels,
207 sizeof(devc->channel_levels), 200);
208 if (ret != sizeof(devc->channel_levels)) {
209 sr_err("failed to get channel offsets: %d", ret);
210 return SR_ERR;
211 }
212
213 /* Comes in as 16-bit numbers with the second byte always 0 on
214 * the DSO-2090. Guessing this is supposed to be big-endian,
215 * since that's how voltage offsets are submitted back to the DSO.
216 * Convert to host order now, so we can use them natively.
217 */
218 for (chan = 0; chan < 2; chan++) {
219 for (v = 0; v < 9; v++) {
220 devc->channel_levels[chan][v][0] = g_ntohs(devc->channel_levels[chan][v][0]);
221 devc->channel_levels[chan][v][1] = g_ntohs(devc->channel_levels[chan][v][1]);
222 }
223 }
224
225 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
226 gs = g_string_sized_new(128);
227 for (chan = 0; chan < 2; chan++) {
228 g_string_printf(gs, "hantek-dso: CH%d:", chan + 1);
229 for (v = 0; v < 9; v++) {
230 g_string_append_printf(gs, " %.4x-%.4x",
231 devc->channel_levels[chan][v][0],
232 devc->channel_levels[chan][v][1]);
233 }
234 sr_dbg(gs->str);
235 }
236 g_string_free(gs, TRUE);
237 }
238
239 return SR_OK;
240}
241
242SR_PRIV int dso_set_trigger_samplerate(struct dev_context *devc)
243{
244 int ret, tmp;
245 uint8_t cmdstring[12];
246 uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
247 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
248 uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
249 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
250
251 sr_dbg("hantek-dso: preparing CMD_SET_TRIGGER_SAMPLERATE");
252
253 memset(cmdstring, 0, sizeof(cmdstring));
254 /* Command */
255 cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
256
257 /* Trigger source */
258 sr_dbg("hantek-dso: trigger source %s", devc->triggersource);
259 if (!strcmp("CH2", devc->triggersource))
260 tmp = 0;
261 else if (!strcmp("CH1", devc->triggersource))
262 tmp = 1;
263 else if (!strcmp("EXT", devc->triggersource))
264 tmp = 2;
265 else {
266 sr_err("hantek-dso: invalid trigger source %s", devc->triggersource);
267 return SR_ERR_ARG;
268 }
269 cmdstring[2] = tmp;
270
271 /* Frame size */
272 sr_dbg("hantek-dso: frame size %d", devc->framesize);
273 cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
274
275 /* Timebase fast */
276 sr_dbg("hantek-dso: time base index %d", devc->timebase);
277 switch (devc->framesize) {
278 case FRAMESIZE_SMALL:
279 if (devc->timebase < TIME_20us)
280 tmp = 0;
281 else if (devc->timebase == TIME_20us)
282 tmp = 1;
283 else if (devc->timebase == TIME_40us)
284 tmp = 2;
285 else if (devc->timebase == TIME_100us)
286 tmp = 3;
287 else if (devc->timebase >= TIME_200us)
288 tmp = 4;
289 break;
290 case FRAMESIZE_LARGE:
291 if (devc->timebase < TIME_40us) {
292 sr_err("hantek-dso: timebase < 40us only supported with 10K buffer");
293 return SR_ERR_ARG;
294 }
295 else if (devc->timebase == TIME_40us)
296 tmp = 0;
297 else if (devc->timebase == TIME_100us)
298 tmp = 2;
299 else if (devc->timebase == TIME_200us)
300 tmp = 3;
301 else if (devc->timebase >= TIME_400us)
302 tmp = 4;
303 break;
304 }
305 cmdstring[2] |= (tmp & 0x07) << 5;
306
307 /* Enabled channels: 00=CH1 01=CH2 10=both */
308 sr_dbg("hantek-dso: channels CH1=%d CH2=%d", devc->ch1_enabled, devc->ch2_enabled);
309 tmp = (((devc->ch2_enabled ? 1 : 0) << 1) + (devc->ch1_enabled ? 1 : 0)) - 1;
310 cmdstring[3] = tmp;
311
312 /* Fast rates channel */
313 /* TODO: is this right? */
314 tmp = devc->timebase < TIME_10us ? 1 : 0;
315 cmdstring[3] |= tmp << 2;
316
317 /* Trigger slope: 0=positive 1=negative */
318 /* TODO: does this work? */
319 sr_dbg("hantek-dso: trigger slope %d", devc->triggerslope);
320 cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
321
322 /* Timebase slow */
323 if (devc->timebase < TIME_100us)
324 tmp = 0;
325 else if (devc->timebase > TIME_400ms)
326 tmp = 0xffed;
327 else {
328 if (devc->framesize == FRAMESIZE_SMALL)
329 tmp = timebase_small[devc->timebase - 3];
330 else
331 tmp = timebase_large[devc->timebase - 3];
332 }
333 cmdstring[4] = tmp & 0xff;
334 cmdstring[5] = (tmp >> 8) & 0xff;
335
336 /* Horizontal trigger position */
337 sr_dbg("hantek-dso: trigger position %3.2f", devc->triggerposition);
338 tmp = 0x77fff + 0x8000 * devc->triggerposition;
339 cmdstring[6] = tmp & 0xff;
340 cmdstring[7] = (tmp >> 8) & 0xff;
341 cmdstring[10] = (tmp >> 16) & 0xff;
342
343 if (send_begin(devc) != SR_OK)
344 return SR_ERR;
345
346 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
347 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
348 cmdstring, sizeof(cmdstring),
349 &tmp, 100)) != 0) {
350 sr_err("Failed to set trigger/samplerate: %d", ret);
351 return SR_ERR;
352 }
353 sr_dbg("hantek-dso: sent CMD_SET_TRIGGER_SAMPLERATE");
354
355 return SR_OK;
356}
357
358SR_PRIV int dso_set_filters(struct dev_context *devc)
359{
360 int ret, tmp;
361 uint8_t cmdstring[8];
362
363 sr_dbg("hantek-dso: preparing CMD_SET_FILTERS");
364
365 memset(cmdstring, 0, sizeof(cmdstring));
366 cmdstring[0] = CMD_SET_FILTERS;
367 cmdstring[1] = 0x0f;
368 if (devc->filter_ch1) {
369 sr_dbg("hantek-dso: turning on CH1 filter");
370 cmdstring[2] |= 0x80;
371 }
372 if (devc->filter_ch2) {
373 sr_dbg("hantek-dso: turning on CH2 filter");
374 cmdstring[2] |= 0x40;
375 }
376 if (devc->filter_trigger) {
377 /* TODO: supported on the DSO-2090? */
378 sr_dbg("hantek-dso: turning on trigger filter");
379 cmdstring[2] |= 0x20;
380 }
381
382 if (send_begin(devc) != SR_OK)
383 return SR_ERR;
384
385 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
386 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
387 cmdstring, sizeof(cmdstring),
388 &tmp, 100)) != 0) {
389 sr_err("Failed to set filters: %d", ret);
390 return SR_ERR;
391 }
392 sr_dbg("hantek-dso: sent CMD_SET_FILTERS");
393
394 return SR_OK;
395}
396
397SR_PRIV int dso_set_voltage(struct dev_context *devc)
398{
399 int ret, tmp;
400 uint8_t cmdstring[8];
401
402 sr_dbg("hantek-dso: preparing CMD_SET_VOLTAGE");
403
404 memset(cmdstring, 0, sizeof(cmdstring));
405 cmdstring[0] = CMD_SET_VOLTAGE;
406 cmdstring[1] = 0x0f;
407 cmdstring[2] = 0x30;
408
409 /* CH1 volts/div is encoded in bits 0-1 */
410 sr_dbg("hantek-dso: CH1 vdiv index %d", devc->voltage_ch1);
411 switch (devc->voltage_ch1) {
412 case VDIV_1V:
413 case VDIV_100MV:
414 case VDIV_10MV:
415 cmdstring[2] |= 0x00;
416 break;
417 case VDIV_2V:
418 case VDIV_200MV:
419 case VDIV_20MV:
420 cmdstring[2] |= 0x01;
421 break;
422 case VDIV_5V:
423 case VDIV_500MV:
424 case VDIV_50MV:
425 cmdstring[2] |= 0x02;
426 break;
427 }
428
429 /* CH2 volts/div is encoded in bits 2-3 */
430 sr_dbg("hantek-dso: CH2 vdiv index %d", devc->voltage_ch2);
431 switch (devc->voltage_ch2) {
432 case VDIV_1V:
433 case VDIV_100MV:
434 case VDIV_10MV:
435 cmdstring[2] |= 0x00;
436 break;
437 case VDIV_2V:
438 case VDIV_200MV:
439 case VDIV_20MV:
440 cmdstring[2] |= 0x04;
441 break;
442 case VDIV_5V:
443 case VDIV_500MV:
444 case VDIV_50MV:
445 cmdstring[2] |= 0x08;
446 break;
447 }
448
449 if (send_begin(devc) != SR_OK)
450 return SR_ERR;
451
452 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
453 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
454 cmdstring, sizeof(cmdstring),
455 &tmp, 100)) != 0) {
456 sr_err("Failed to set voltage: %d", ret);
457 return SR_ERR;
458 }
459 sr_dbg("hantek-dso: sent CMD_SET_VOLTAGE");
460
461 return SR_OK;
462}
463
464SR_PRIV int dso_set_relays(struct dev_context *devc)
465{
466 GString *gs;
467 int ret, i;
468 uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
469 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
470
471 sr_dbg("hantek-dso: preparing CTRL_SETRELAYS");
472
473 if (devc->voltage_ch1 < VDIV_1V)
474 relays[1] = ~relays[1];
475
476 if (devc->voltage_ch1 < VDIV_100MV)
477 relays[2] = ~relays[2];
478
479 sr_dbg("hantek-dso: CH1 coupling %d", devc->coupling_ch1);
480 if (devc->coupling_ch1 != COUPLING_AC)
481 relays[3] = ~relays[3];
482
483 if (devc->voltage_ch2 < VDIV_1V)
484 relays[4] = ~relays[4];
485
486 if (devc->voltage_ch2 < VDIV_100MV)
487 relays[5] = ~relays[5];
488
489 sr_dbg("hantek-dso: CH2 coupling %d", devc->coupling_ch1);
490 if (devc->coupling_ch2 != COUPLING_AC)
491 relays[6] = ~relays[6];
492
493 if (!strcmp(devc->triggersource, "EXT"))
494 relays[7] = ~relays[7];
495
496 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
497 gs = g_string_sized_new(128);
498 g_string_printf(gs, "hantek-dso: relays:");
499 for (i = 0; i < 17; i++)
500 g_string_append_printf(gs, " %.2x", relays[i]);
501 sr_dbg(gs->str);
502 g_string_free(gs, TRUE);
503 }
504
505 if ((ret = libusb_control_transfer(devc->usb->devhdl,
506 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
507 0, 0, relays, 17, 100)) != sizeof(relays)) {
508 sr_err("failed to set relays: %d", ret);
509 return SR_ERR;
510 }
511 sr_dbg("hantek-dso: sent CTRL_SETRELAYS");
512
513 return SR_OK;
514}
515
516SR_PRIV int dso_set_voffsets(struct dev_context *devc)
517{
518 int offset, ret;
519 uint16_t *ch_levels;
520 uint8_t offsets[17];
521
522 sr_dbg("hantek-dso: preparing CTRL_SETOFFSET");
523
524 memset(offsets, 0, sizeof(offsets));
525 /* Channel 1 */
526 ch_levels = devc->channel_levels[0][devc->voltage_ch1];
527 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
528 offsets[0] = (offset >> 8) | 0x20;
529 offsets[1] = offset & 0xff;
530 sr_dbg("hantek-dso: CH1 offset %3.2f (%.2x%.2x)", devc->voffset_ch1,
531 offsets[0], offsets[1]);
532
533 /* Channel 2 */
534 ch_levels = devc->channel_levels[1][devc->voltage_ch2];
535 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
536 offsets[2] = (offset >> 8) | 0x20;
537 offsets[3] = offset & 0xff;
538 sr_dbg("hantek-dso: CH2 offset %3.2f (%.2x%.2x)", devc->voffset_ch2,
539 offsets[2], offsets[3]);
540
541 /* Trigger */
542 offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
543 offsets[4] = (offset >> 8) | 0x20;
544 offsets[5] = offset & 0xff;
545 sr_dbg("hantek-dso: trigger offset %3.2f (%.2x%.2x)", devc->voffset_trigger,
546 offsets[4], offsets[5]);
547
548 if ((ret = libusb_control_transfer(devc->usb->devhdl,
549 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
550 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
551 sr_err("failed to set offsets: %d", ret);
552 return SR_ERR;
553 }
554 sr_dbg("hantek-dso: sent CTRL_SETOFFSET");
555
556 return SR_OK;
557}
558
559SR_PRIV int dso_enable_trigger(struct dev_context *devc)
560{
561 int ret, tmp;
562 uint8_t cmdstring[2];
563
564 sr_dbg("hantek-dso: sending CMD_ENABLE_TRIGGER");
565
566 memset(cmdstring, 0, sizeof(cmdstring));
567 cmdstring[0] = CMD_ENABLE_TRIGGER;
568 cmdstring[1] = 0x00;
569
570 if (send_begin(devc) != SR_OK)
571 return SR_ERR;
572
573 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
574 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
575 cmdstring, sizeof(cmdstring),
576 &tmp, 100)) != 0) {
577 sr_err("Failed to enable trigger: %d", ret);
578 return SR_ERR;
579 }
580
581 return SR_OK;
582}
583
584SR_PRIV int dso_force_trigger(struct dev_context *devc)
585{
586 int ret, tmp;
587 uint8_t cmdstring[2];
588
589 sr_dbg("hantek-dso: sending CMD_FORCE_TRIGGER");
590
591 memset(cmdstring, 0, sizeof(cmdstring));
592 cmdstring[0] = CMD_FORCE_TRIGGER;
593 cmdstring[1] = 0x00;
594
595 if (send_begin(devc) != SR_OK)
596 return SR_ERR;
597
598 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
599 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
600 cmdstring, sizeof(cmdstring),
601 &tmp, 100)) != 0) {
602 sr_err("Failed to force trigger: %d", ret);
603 return SR_ERR;
604 }
605
606 return SR_OK;
607}
608
609SR_PRIV int dso_init(struct dev_context *devc)
610{
611
612 sr_dbg("hantek-dso: initializing dso");
613
614 if (get_channel_offsets(devc) != SR_OK)
615 return SR_ERR;
616
617 if (dso_set_trigger_samplerate(devc) != SR_OK)
618 return SR_ERR;
619
620 if (dso_set_filters(devc) != SR_OK)
621 return SR_ERR;
622
623 if (dso_set_voltage(devc) != SR_OK)
624 return SR_ERR;
625
626 if (dso_set_relays(devc) != SR_OK)
627 return SR_ERR;
628
629 if (dso_set_voffsets(devc) != SR_OK)
630 return SR_ERR;
631
632 if (dso_enable_trigger(devc) != SR_OK)
633 return SR_ERR;
634
635 return SR_OK;
636}
637
638SR_PRIV int dso_get_capturestate(struct dev_context *devc, uint8_t *capturestate,
639 uint32_t *trigger_offset)
640{
641 int ret, tmp, i;
642 unsigned int bitvalue, toff;
643 uint8_t cmdstring[2], inbuf[512];
644
645 sr_dbg("hantek-dso: sending CMD_GET_CAPTURESTATE");
646
647 cmdstring[0] = CMD_GET_CAPTURESTATE;
648 cmdstring[1] = 0;
649
650 if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
651 sr_dbg("Failed to send get_capturestate command: %d", ret);
652 return SR_ERR;
653 }
654
655 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
656 DSO_EP_IN | LIBUSB_ENDPOINT_IN,
657 inbuf, 512, &tmp, 100)) != 0) {
658 sr_dbg("Failed to get capturestate: %d", ret);
659 return SR_ERR;
660 }
661 *capturestate = inbuf[0];
662 toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
663
664 /* This conversion comes from the openhantek project.
665 * Each set bit in the 24-bit value inverts all bits with a lower
666 * value. No idea why the device reports the trigger point this way.
667 */
668 bitvalue = 1;
669 for (i = 0; i < 24; i++) {
670 /* Each set bit inverts all bits with a lower value. */
671 if(toff & bitvalue)
672 toff ^= bitvalue - 1;
673 bitvalue <<= 1;
674 }
675 *trigger_offset = toff;
676
677 return SR_OK;
678}
679
680SR_PRIV int dso_capture_start(struct dev_context *devc)
681{
682 int ret;
683 uint8_t cmdstring[2];
684
685 sr_dbg("hantek-dso: sending CMD_CAPTURE_START");
686
687 cmdstring[0] = CMD_CAPTURE_START;
688 cmdstring[1] = 0;
689
690 if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
691 sr_err("Failed to send capture_start command: %d", ret);
692 return SR_ERR;
693 }
694
695 return SR_OK;
696}
697
698SR_PRIV int dso_get_channeldata(struct dev_context *devc, libusb_transfer_cb_fn cb)
699{
700 struct libusb_transfer *transfer;
701 int num_transfers, ret, i;
702 uint8_t cmdstring[2];
703 unsigned char *buf;
704
705 sr_dbg("hantek-dso: sending CMD_GET_CHANNELDATA");
706
707 cmdstring[0] = CMD_GET_CHANNELDATA;
708 cmdstring[1] = 0;
709
710 if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
711 sr_err("Failed to get channel data: %d", ret);
712 return SR_ERR;
713 }
714
715 /* TODO: dso-2xxx only */
716 num_transfers = devc->framesize * sizeof(unsigned short) / devc->epin_maxpacketsize;
717 sr_dbg("hantek-dso: queueing up %d transfers", num_transfers);
718 for (i = 0; i < num_transfers; i++) {
719 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
720 sr_err("hantek-dso: %s: buf malloc failed", __func__);
721 return SR_ERR_MALLOC;
722 }
723 transfer = libusb_alloc_transfer(0);
724 libusb_fill_bulk_transfer(transfer, devc->usb->devhdl,
725 DSO_EP_IN | LIBUSB_ENDPOINT_IN, buf,
726 devc->epin_maxpacketsize, cb, devc, 40);
727 if ((ret = libusb_submit_transfer(transfer)) != 0) {
728 sr_err("failed to submit transfer: %d", ret);
729 /* TODO: Free them all. */
730 libusb_free_transfer(transfer);
731 g_free(buf);
732 return SR_ERR;
733 }
734 }
735
736 return SR_OK;
737}
738
Hardware access and backend lib