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