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