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1/*
2 * This file is part of the libsigrok 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 <string.h>
23#include <glib.h>
24#include <libusb.h>
25#include <libsigrok/libsigrok.h>
26#include "libsigrok-internal.h"
27#include "dso.h"
28
29#define NUM_CHANNELS 2
30
31extern struct sr_dev_driver hantek_dso_driver_info;
32
33static int send_begin(const struct sr_dev_inst *sdi)
34{
35 struct sr_usb_dev_inst *usb;
36 int ret;
37 unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe,
38 0x00, 0x01, 0x00};
39
40 sr_dbg("Sending CTRL_BEGINCOMMAND.");
41
42 usb = sdi->conn;
43 if ((ret = libusb_control_transfer(usb->devhdl,
44 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_BEGINCOMMAND,
45 0, 0, buffer, sizeof(buffer), 200)) != sizeof(buffer)) {
46 sr_err("Failed to send begincommand: %s.",
47 libusb_error_name(ret));
48 return SR_ERR;
49 }
50
51 return SR_OK;
52}
53
54static int send_bulkcmd(const struct sr_dev_inst *sdi, uint8_t *cmdstring, int cmdlen)
55{
56 struct sr_usb_dev_inst *usb;
57 int ret, tmp;
58
59 usb = sdi->conn;
60
61 if (send_begin(sdi) != SR_OK)
62 return SR_ERR;
63
64 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, cmdstring,
65 cmdlen, &tmp, 200)) != 0)
66 return SR_ERR;
67
68 return SR_OK;
69}
70
71static int dso_getmps(libusb_device *dev)
72{
73 struct libusb_device_descriptor des;
74 struct libusb_config_descriptor *conf_dsc;
75 const struct libusb_interface_descriptor *intf_dsc;
76 int mps;
77
78 if (libusb_get_device_descriptor(dev, &des) != 0)
79 return 0;
80
81 if (des.bNumConfigurations != 1)
82 return 0;
83
84 if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
85 return 0;
86
87 mps = 0;
88 intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
89 if (intf_dsc->bNumEndpoints != 2)
90 goto err;
91
92 if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) !=
93 (2 | LIBUSB_ENDPOINT_OUT))
94 /* The first endpoint should be 2 (outbound). */
95 goto err;
96
97 if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) !=
98 (6 | LIBUSB_ENDPOINT_IN))
99 /* The second endpoint should be 6 (inbound). */
100 goto err;
101
102 mps = intf_dsc->endpoint[1].wMaxPacketSize;
103
104err:
105 if (conf_dsc)
106 libusb_free_config_descriptor(conf_dsc);
107
108 return mps;
109}
110
111SR_PRIV int dso_open(struct sr_dev_inst *sdi)
112{
113 struct dev_context *devc;
114 struct drv_context *drvc = hantek_dso_driver_info.context;
115 struct sr_usb_dev_inst *usb;
116 struct libusb_device_descriptor des;
117 libusb_device **devlist;
118 int err, i;
119 char connection_id[64];
120
121 devc = sdi->priv;
122 usb = sdi->conn;
123
124 if (sdi->status == SR_ST_ACTIVE)
125 /* already in use */
126 return SR_ERR;
127
128 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
129 for (i = 0; devlist[i]; i++) {
130 if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
131 sr_err("Failed to get device descriptor: %s.",
132 libusb_error_name(err));
133 continue;
134 }
135
136 if (des.idVendor != devc->profile->fw_vid
137 || des.idProduct != devc->profile->fw_pid)
138 continue;
139
140 if ((sdi->status == SR_ST_INITIALIZING) ||
141 (sdi->status == SR_ST_INACTIVE)) {
142 /*
143 * Check device by its physical USB bus/port address.
144 */
145 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
146 if (strcmp(sdi->connection_id, connection_id))
147 /* This is not the one. */
148 continue;
149 }
150
151 if (!(err = libusb_open(devlist[i], &usb->devhdl))) {
152 if (usb->address == 0xff)
153 /*
154 * first time we touch this device after firmware upload,
155 * so we don't know the address yet.
156 */
157 usb->address = libusb_get_device_address(devlist[i]);
158
159 if (!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
160 sr_err("Wrong endpoint profile.");
161 else {
162 sdi->status = SR_ST_ACTIVE;
163 sr_info("Opened device on %d.%d (logical) / "
164 "%s (physical) interface %d.",
165 usb->bus, usb->address,
166 sdi->connection_id, USB_INTERFACE);
167 }
168 } else {
169 sr_err("Failed to open device: %s.",
170 libusb_error_name(err));
171 }
172
173 /* If we made it here, we handled the device (somehow). */
174 break;
175 }
176 libusb_free_device_list(devlist, 1);
177
178 if (sdi->status != SR_ST_ACTIVE)
179 return SR_ERR;
180
181 return SR_OK;
182}
183
184SR_PRIV void dso_close(struct sr_dev_inst *sdi)
185{
186 struct sr_usb_dev_inst *usb;
187
188 usb = sdi->conn;
189
190 if (!usb->devhdl)
191 return;
192
193 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
194 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
195 libusb_release_interface(usb->devhdl, USB_INTERFACE);
196 libusb_close(usb->devhdl);
197 usb->devhdl = NULL;
198 sdi->status = SR_ST_INACTIVE;
199
200}
201
202static int get_channel_offsets(const struct sr_dev_inst *sdi)
203{
204 struct dev_context *devc;
205 struct sr_usb_dev_inst *usb;
206 GString *gs;
207 int chan, v, ret;
208
209 sr_dbg("Getting channel offsets.");
210
211 devc = sdi->priv;
212 usb = sdi->conn;
213
214 ret = libusb_control_transfer(usb->devhdl,
215 LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
216 CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
217 (unsigned char *)&devc->channel_levels,
218 sizeof(devc->channel_levels), 200);
219 if (ret != sizeof(devc->channel_levels)) {
220 sr_err("Failed to get channel offsets: %s.",
221 libusb_error_name(ret));
222 return SR_ERR;
223 }
224
225 /* Comes in as 16-bit numbers with the second byte always 0 on
226 * the DSO-2090. Guessing this is supposed to be big-endian,
227 * since that's how voltage offsets are submitted back to the DSO.
228 * Convert to host order now, so we can use them natively.
229 */
230 for (chan = 0; chan < NUM_CHANNELS; chan++) {
231 for (v = 0; v < 9; v++) {
232 devc->channel_levels[chan][v][0] =
233 g_ntohs(devc->channel_levels[chan][v][0]);
234 devc->channel_levels[chan][v][1] =
235 g_ntohs(devc->channel_levels[chan][v][1]);
236 }
237 }
238
239 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
240 gs = g_string_sized_new(128);
241 for (chan = 0; chan < NUM_CHANNELS; chan++) {
242 g_string_printf(gs, "CH%d:", chan + 1);
243 for (v = 0; v < 9; v++) {
244 g_string_append_printf(gs, " %.4x-%.4x",
245 devc->channel_levels[chan][v][0],
246 devc->channel_levels[chan][v][1]);
247 }
248 sr_dbg("%s", gs->str);
249 }
250 g_string_free(gs, TRUE);
251 }
252
253 return SR_OK;
254}
255
256static int dso_set_trigger_samplerate(const struct sr_dev_inst *sdi)
257{
258 struct dev_context *devc;
259 struct sr_usb_dev_inst *usb;
260 int ret, tmp;
261 uint8_t cmdstring[12];
262 uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
263 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
264 uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
265 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
266
267 sr_dbg("Preparing CMD_SET_TRIGGER_SAMPLERATE.");
268
269 devc = sdi->priv;
270 usb = sdi->conn;
271
272 memset(cmdstring, 0, sizeof(cmdstring));
273 /* Command */
274 cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
275
276 /* Trigger source */
277 sr_dbg("Trigger source %s.", devc->triggersource);
278 if (!strcmp("CH2", devc->triggersource))
279 tmp = 0;
280 else if (!strcmp("CH1", devc->triggersource))
281 tmp = 1;
282 else if (!strcmp("EXT", devc->triggersource))
283 tmp = 2;
284 else {
285 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
286 return SR_ERR_ARG;
287 }
288 cmdstring[2] = tmp;
289
290 /* Frame size */
291 sr_dbg("Frame size: %d.", devc->framesize);
292 cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
293
294 /* Timebase fast */
295 sr_dbg("Time base index: %d.", devc->timebase);
296 if (devc->framesize == FRAMESIZE_SMALL) {
297 if (devc->timebase < TIME_20us)
298 tmp = 0;
299 else if (devc->timebase == TIME_20us)
300 tmp = 1;
301 else if (devc->timebase == TIME_40us)
302 tmp = 2;
303 else if (devc->timebase == TIME_100us)
304 tmp = 3;
305 else if (devc->timebase >= TIME_200us)
306 tmp = 4;
307 } else {
308 if (devc->timebase < TIME_40us) {
309 sr_err("Timebase < 40us only supported with 10K buffer.");
310 return SR_ERR_ARG;
311 }
312 else if (devc->timebase == TIME_40us)
313 tmp = 0;
314 else if (devc->timebase == TIME_100us)
315 tmp = 2;
316 else if (devc->timebase == TIME_200us)
317 tmp = 3;
318 else if (devc->timebase >= TIME_400us)
319 tmp = 4;
320 }
321 cmdstring[2] |= (tmp & 0x07) << 5;
322
323 /* Enabled channels: 00=CH1 01=CH2 10=both */
324 sr_dbg("Channels CH1=%d CH2=%d", devc->ch1_enabled, devc->ch2_enabled);
325 tmp = (((devc->ch2_enabled ? 1 : 0) << 1) + (devc->ch1_enabled ? 1 : 0)) - 1;
326 cmdstring[3] = tmp;
327
328 /* Fast rates channel */
329 /* TODO: Is this right? */
330 tmp = devc->timebase < TIME_10us ? 1 : 0;
331 cmdstring[3] |= tmp << 2;
332
333 /* Trigger slope: 0=positive 1=negative */
334 /* TODO: Does this work? */
335 sr_dbg("Trigger slope: %d.", devc->triggerslope);
336 cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
337
338 /* Timebase slow */
339 if (devc->timebase < TIME_100us)
340 tmp = 0;
341 else if (devc->timebase > TIME_400ms)
342 tmp = 0xffed;
343 else {
344 if (devc->framesize == FRAMESIZE_SMALL)
345 tmp = timebase_small[devc->timebase - 3];
346 else
347 tmp = timebase_large[devc->timebase - 3];
348 }
349 cmdstring[4] = tmp & 0xff;
350 cmdstring[5] = (tmp >> 8) & 0xff;
351
352 /* Horizontal trigger position */
353 sr_dbg("Trigger position: %3.2f.", devc->triggerposition);
354 tmp = 0x77fff + 0x8000 * devc->triggerposition;
355 cmdstring[6] = tmp & 0xff;
356 cmdstring[7] = (tmp >> 8) & 0xff;
357 cmdstring[10] = (tmp >> 16) & 0xff;
358
359 if (send_begin(sdi) != SR_OK)
360 return SR_ERR;
361
362 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
363 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
364 sr_err("Failed to set trigger/samplerate: %s.",
365 libusb_error_name(ret));
366 return SR_ERR;
367 }
368 sr_dbg("Sent CMD_SET_TRIGGER_SAMPLERATE.");
369
370 return SR_OK;
371}
372
373static int dso_set_filters(const struct sr_dev_inst *sdi)
374{
375 struct dev_context *devc;
376 struct sr_usb_dev_inst *usb;
377 int ret, tmp;
378 uint8_t cmdstring[8];
379
380 sr_dbg("Preparing CMD_SET_FILTERS.");
381
382 devc = sdi->priv;
383 usb = sdi->conn;
384
385 memset(cmdstring, 0, sizeof(cmdstring));
386 cmdstring[0] = CMD_SET_FILTERS;
387 cmdstring[1] = 0x0f;
388 if (devc->filter[0]) {
389 sr_dbg("Turning on CH1 filter.");
390 cmdstring[2] |= 0x80;
391 }
392 if (devc->filter[1]) {
393 sr_dbg("Turning on CH2 filter.");
394 cmdstring[2] |= 0x40;
395 }
396 /*
397 * Not supported: filtering on the trigger
398 * cmdstring[2] |= 0x20;
399 */
400
401 if (send_begin(sdi) != SR_OK)
402 return SR_ERR;
403
404 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
405 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
406 sr_err("Failed to set filters: %s.", libusb_error_name(ret));
407 return SR_ERR;
408 }
409 sr_dbg("Sent CMD_SET_FILTERS.");
410
411 return SR_OK;
412}
413
414static int dso_set_voltage(const struct sr_dev_inst *sdi)
415{
416 struct dev_context *devc;
417 struct sr_usb_dev_inst *usb;
418 int ret, tmp;
419 uint8_t cmdstring[8];
420
421 sr_dbg("Preparing CMD_SET_VOLTAGE.");
422
423 devc = sdi->priv;
424 usb = sdi->conn;
425
426 memset(cmdstring, 0, sizeof(cmdstring));
427 cmdstring[0] = CMD_SET_VOLTAGE;
428 cmdstring[1] = 0x0f;
429 cmdstring[2] = 0x30;
430
431 /* CH1 volts/div is encoded in bits 0-1 */
432 sr_dbg("CH1 vdiv index: %d.", devc->voltage[0]);
433 switch (devc->voltage[0]) {
434 case VDIV_1V:
435 case VDIV_100MV:
436 case VDIV_10MV:
437 cmdstring[2] |= 0x00;
438 break;
439 case VDIV_2V:
440 case VDIV_200MV:
441 case VDIV_20MV:
442 cmdstring[2] |= 0x01;
443 break;
444 case VDIV_5V:
445 case VDIV_500MV:
446 case VDIV_50MV:
447 cmdstring[2] |= 0x02;
448 break;
449 }
450
451 /* CH2 volts/div is encoded in bits 2-3 */
452 sr_dbg("CH2 vdiv index: %d.", devc->voltage[1]);
453 switch (devc->voltage[1]) {
454 case VDIV_1V:
455 case VDIV_100MV:
456 case VDIV_10MV:
457 cmdstring[2] |= 0x00;
458 break;
459 case VDIV_2V:
460 case VDIV_200MV:
461 case VDIV_20MV:
462 cmdstring[2] |= 0x04;
463 break;
464 case VDIV_5V:
465 case VDIV_500MV:
466 case VDIV_50MV:
467 cmdstring[2] |= 0x08;
468 break;
469 }
470
471 if (send_begin(sdi) != SR_OK)
472 return SR_ERR;
473
474 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
475 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
476 sr_err("Failed to set voltage: %s.", libusb_error_name(ret));
477 return SR_ERR;
478 }
479 sr_dbg("Sent CMD_SET_VOLTAGE.");
480
481 return SR_OK;
482}
483
484static int dso_set_relays(const struct sr_dev_inst *sdi)
485{
486 struct dev_context *devc;
487 struct sr_usb_dev_inst *usb;
488 GString *gs;
489 int ret, i;
490 uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
491 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
492
493 sr_dbg("Preparing CTRL_SETRELAYS.");
494
495 devc = sdi->priv;
496 usb = sdi->conn;
497
498 if (devc->voltage[0] < VDIV_1V)
499 relays[1] = ~relays[1];
500
501 if (devc->voltage[0] < VDIV_100MV)
502 relays[2] = ~relays[2];
503
504 sr_dbg("CH1 coupling: %d.", devc->coupling[0]);
505 if (devc->coupling[0] != COUPLING_AC)
506 relays[3] = ~relays[3];
507
508 if (devc->voltage[1] < VDIV_1V)
509 relays[4] = ~relays[4];
510
511 if (devc->voltage[1] < VDIV_100MV)
512 relays[5] = ~relays[5];
513
514 sr_dbg("CH2 coupling: %d.", devc->coupling[1]);
515 if (devc->coupling[1] != COUPLING_AC)
516 relays[6] = ~relays[6];
517
518 if (!strcmp(devc->triggersource, "EXT"))
519 relays[7] = ~relays[7];
520
521 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
522 gs = g_string_sized_new(128);
523 g_string_printf(gs, "Relays:");
524 for (i = 0; i < 17; i++)
525 g_string_append_printf(gs, " %.2x", relays[i]);
526 sr_dbg("%s", gs->str);
527 g_string_free(gs, TRUE);
528 }
529
530 if ((ret = libusb_control_transfer(usb->devhdl,
531 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
532 0, 0, relays, 17, 100)) != sizeof(relays)) {
533 sr_err("Failed to set relays: %s.", libusb_error_name(ret));
534 return SR_ERR;
535 }
536 sr_dbg("Sent CTRL_SETRELAYS.");
537
538 return SR_OK;
539}
540
541static int dso_set_voffsets(const struct sr_dev_inst *sdi)
542{
543 struct dev_context *devc;
544 struct sr_usb_dev_inst *usb;
545 int offset, ret;
546 uint16_t *ch_levels;
547 uint8_t offsets[17];
548
549 sr_dbg("Preparing CTRL_SETOFFSET.");
550
551 devc = sdi->priv;
552 usb = sdi->conn;
553
554 memset(offsets, 0, sizeof(offsets));
555 /* Channel 1 */
556 ch_levels = devc->channel_levels[0][devc->voltage[0]];
557 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
558 offsets[0] = (offset >> 8) | 0x20;
559 offsets[1] = offset & 0xff;
560 sr_dbg("CH1 offset: %3.2f (%.2x%.2x).", devc->voffset_ch1,
561 offsets[0], offsets[1]);
562
563 /* Channel 2 */
564 ch_levels = devc->channel_levels[1][devc->voltage[1]];
565 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
566 offsets[2] = (offset >> 8) | 0x20;
567 offsets[3] = offset & 0xff;
568 sr_dbg("CH2 offset: %3.2f (%.2x%.2x).", devc->voffset_ch2,
569 offsets[2], offsets[3]);
570
571 /* Trigger */
572 offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
573 offsets[4] = (offset >> 8) | 0x20;
574 offsets[5] = offset & 0xff;
575 sr_dbg("Trigger offset: %3.2f (%.2x%.2x).", devc->voffset_trigger,
576 offsets[4], offsets[5]);
577
578 if ((ret = libusb_control_transfer(usb->devhdl,
579 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
580 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
581 sr_err("Failed to set offsets: %s.", libusb_error_name(ret));
582 return SR_ERR;
583 }
584 sr_dbg("Sent CTRL_SETOFFSET.");
585
586 return SR_OK;
587}
588
589SR_PRIV int dso_enable_trigger(const struct sr_dev_inst *sdi)
590{
591 struct sr_usb_dev_inst *usb;
592 int ret, tmp;
593 uint8_t cmdstring[2];
594
595 sr_dbg("Sending CMD_ENABLE_TRIGGER.");
596
597 usb = sdi->conn;
598
599 memset(cmdstring, 0, sizeof(cmdstring));
600 cmdstring[0] = CMD_ENABLE_TRIGGER;
601 cmdstring[1] = 0x00;
602
603 if (send_begin(sdi) != SR_OK)
604 return SR_ERR;
605
606 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
607 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
608 sr_err("Failed to enable trigger: %s.", libusb_error_name(ret));
609 return SR_ERR;
610 }
611
612 return SR_OK;
613}
614
615SR_PRIV int dso_force_trigger(const struct sr_dev_inst *sdi)
616{
617 struct sr_usb_dev_inst *usb;
618 int ret, tmp;
619 uint8_t cmdstring[2];
620
621 sr_dbg("Sending CMD_FORCE_TRIGGER.");
622
623 usb = sdi->conn;
624
625 memset(cmdstring, 0, sizeof(cmdstring));
626 cmdstring[0] = CMD_FORCE_TRIGGER;
627 cmdstring[1] = 0x00;
628
629 if (send_begin(sdi) != SR_OK)
630 return SR_ERR;
631
632 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
633 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
634 sr_err("Failed to force trigger: %s.", libusb_error_name(ret));
635 return SR_ERR;
636 }
637
638 return SR_OK;
639}
640
641SR_PRIV int dso_init(const struct sr_dev_inst *sdi)
642{
643
644 sr_dbg("Initializing DSO.");
645
646 if (get_channel_offsets(sdi) != SR_OK)
647 return SR_ERR;
648
649 if (dso_set_trigger_samplerate(sdi) != SR_OK)
650 return SR_ERR;
651
652 if (dso_set_filters(sdi) != SR_OK)
653 return SR_ERR;
654
655 if (dso_set_voltage(sdi) != SR_OK)
656 return SR_ERR;
657
658 if (dso_set_relays(sdi) != SR_OK)
659 return SR_ERR;
660
661 if (dso_set_voffsets(sdi) != SR_OK)
662 return SR_ERR;
663
664 if (dso_enable_trigger(sdi) != SR_OK)
665 return SR_ERR;
666
667 return SR_OK;
668}
669
670SR_PRIV int dso_get_capturestate(const struct sr_dev_inst *sdi,
671 uint8_t *capturestate, uint32_t *trigger_offset)
672{
673 struct sr_usb_dev_inst *usb;
674 int ret, tmp, i;
675 unsigned int bitvalue, toff;
676 uint8_t cmdstring[2], inbuf[512];
677
678 sr_dbg("Sending CMD_GET_CAPTURESTATE.");
679
680 usb = sdi->conn;
681
682 cmdstring[0] = CMD_GET_CAPTURESTATE;
683 cmdstring[1] = 0;
684
685 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
686 sr_dbg("Failed to send get_capturestate command: %s.",
687 libusb_error_name(ret));
688 return SR_ERR;
689 }
690
691 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_IN,
692 inbuf, 512, &tmp, 100)) != 0) {
693 sr_dbg("Failed to get capturestate: %s.",
694 libusb_error_name(ret));
695 return SR_ERR;
696 }
697 *capturestate = inbuf[0];
698 toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
699
700 /*
701 * This conversion comes from the openhantek project.
702 * Each set bit in the 24-bit value inverts all bits with a lower
703 * value. No idea why the device reports the trigger point this way.
704 */
705 bitvalue = 1;
706 for (i = 0; i < 24; i++) {
707 /* Each set bit inverts all bits with a lower value. */
708 if (toff & bitvalue)
709 toff ^= bitvalue - 1;
710 bitvalue <<= 1;
711 }
712 *trigger_offset = toff;
713
714 return SR_OK;
715}
716
717SR_PRIV int dso_capture_start(const struct sr_dev_inst *sdi)
718{
719 int ret;
720 uint8_t cmdstring[2];
721
722 sr_dbg("Sending CMD_CAPTURE_START.");
723
724 cmdstring[0] = CMD_CAPTURE_START;
725 cmdstring[1] = 0;
726
727 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
728 sr_err("Failed to send capture_start command: %s.",
729 libusb_error_name(ret));
730 return SR_ERR;
731 }
732
733 return SR_OK;
734}
735
736SR_PRIV int dso_get_channeldata(const struct sr_dev_inst *sdi,
737 libusb_transfer_cb_fn cb)
738{
739 struct dev_context *devc;
740 struct sr_usb_dev_inst *usb;
741 struct libusb_transfer *transfer;
742 int num_transfers, ret, i;
743 uint8_t cmdstring[2];
744 unsigned char *buf;
745
746 sr_dbg("Sending CMD_GET_CHANNELDATA.");
747
748 devc = sdi->priv;
749 usb = sdi->conn;
750
751 cmdstring[0] = CMD_GET_CHANNELDATA;
752 cmdstring[1] = 0;
753
754 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
755 sr_err("Failed to get channel data: %s.",
756 libusb_error_name(ret));
757 return SR_ERR;
758 }
759
760 /* TODO: DSO-2xxx only. */
761 num_transfers = devc->framesize *
762 sizeof(unsigned short) / devc->epin_maxpacketsize;
763 sr_dbg("Queueing up %d transfers.", num_transfers);
764 for (i = 0; i < num_transfers; i++) {
765 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
766 sr_err("Failed to malloc USB endpoint buffer.");
767 return SR_ERR_MALLOC;
768 }
769 transfer = libusb_alloc_transfer(0);
770 libusb_fill_bulk_transfer(transfer, usb->devhdl, DSO_EP_IN, buf,
771 devc->epin_maxpacketsize, cb, (void *)sdi, 40);
772 if ((ret = libusb_submit_transfer(transfer)) != 0) {
773 sr_err("Failed to submit transfer: %s.",
774 libusb_error_name(ret));
775 /* TODO: Free them all. */
776 libusb_free_transfer(transfer);
777 g_free(buf);
778 return SR_ERR;
779 }
780 }
781
782 return SR_OK;
783}
Hardware access and backend lib