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hantek-dso: use driver-private storage for instances and libusb_context
[libsigrok.git] / hardware / hantek-dso / dso.c
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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 "config.h"
25#include "dso.h"
26#include <string.h>
27#include <glib.h>
28#include <libusb.h>
29
30extern struct sr_dev_driver hantek_dso_driver_info;
31static struct sr_dev_driver *hdi = &hantek_dso_driver_info;
32
33
34static int send_begin(struct dev_context *devc)
35{
36 int ret;
37 unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe,
38 0x00, 0x01, 0x00};
39
40 sr_dbg("hantek-dso: sending CTRL_BEGINCOMMAND");
41
42 if ((ret = libusb_control_transfer(devc->usb->devhdl,
43 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_BEGINCOMMAND,
44 0, 0, buffer, sizeof(buffer), 200)) != sizeof(buffer)) {
45 sr_err("failed to send begincommand: %d", ret);
46 return SR_ERR;
47 }
48
49 return SR_OK;
50}
51
52static int send_bulkcmd(struct dev_context *devc, uint8_t *cmdstring, int cmdlen)
53{
54 int ret, tmp;
55
56 if (send_begin(devc) != SR_OK)
57 return SR_ERR;
58
59 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
60 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
61 cmdstring, cmdlen, &tmp, 200)) != 0)
62 return SR_ERR;
63
64 return SR_OK;
65}
66
67SR_PRIV int dso_getmps(libusb_device *dev)
68{
69 struct libusb_device_descriptor des;
70 struct libusb_config_descriptor *conf_dsc;
71 const struct libusb_interface_descriptor *intf_dsc;
72 int mps;
73
74 if (libusb_get_device_descriptor(dev, &des) != 0)
75 return 0;
76
77 if (des.bNumConfigurations != 1)
78 return 0;
79
80 if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
81 return 0;
82
83 mps = 0;
84 intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
85 if (intf_dsc->bNumEndpoints != 2)
86 goto err;
87
88 if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) !=
89 (2 | LIBUSB_ENDPOINT_OUT))
90 /* The first endpoint should be 2 (outbound). */
91 goto err;
92
93 if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) !=
94 (6 | LIBUSB_ENDPOINT_IN))
95 /* The second endpoint should be 6 (inbound). */
96 goto err;
97
98 mps = intf_dsc->endpoint[1].wMaxPacketSize;
99
100err:
101 if (conf_dsc)
102 libusb_free_config_descriptor(conf_dsc);
103
104 return mps;
105}
106
107SR_PRIV int dso_open(struct sr_dev_inst *sdi)
108{
109 libusb_device **devlist;
110 struct libusb_device_descriptor des;
111 struct drv_context *drvc;
112 struct dev_context *devc;
113 int err, skip, i;
114
115 drvc = hdi->priv;
116 devc = sdi->priv;
117
118 if (sdi->status == SR_ST_ACTIVE)
119 /* already in use */
120 return SR_ERR;
121
122 skip = 0;
123 libusb_get_device_list(drvc->usb_context, &devlist);
124 for (i = 0; devlist[i]; i++) {
125 if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
126 sr_err("hantek-dso: failed to get device descriptor: %d", err);
127 continue;
128 }
129
130 if (des.idVendor != devc->profile->fw_vid
131 || des.idProduct != devc->profile->fw_pid)
132 continue;
133
134 if (sdi->status == SR_ST_INITIALIZING) {
135 if (skip != sdi->index) {
136 /* Skip devices of this type that aren't the one we want. */
137 skip += 1;
138 continue;
139 }
140 } else if (sdi->status == SR_ST_INACTIVE) {
141 /*
142 * This device is fully enumerated, so we need to find
143 * this device by vendor, product, bus and address.
144 */
145 if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
146 || libusb_get_device_address(devlist[i]) != devc->usb->address)
147 /* this is not the one */
148 continue;
149 }
150
151 if (!(err = libusb_open(devlist[i], &devc->usb->devhdl))) {
152 if (devc->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 devc->usb->address = libusb_get_device_address(devlist[i]);
158
159 if(!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
160 sr_err("hantek-dso: wrong endpoint profile");
161 else {
162 sdi->status = SR_ST_ACTIVE;
163 sr_info("hantek-dso: opened device %d on %d.%d interface %d",
164 sdi->index, devc->usb->bus,
165 devc->usb->address, USB_INTERFACE);
166 }
167 } else {
168 sr_err("hantek-dso: failed to open device: %d", err);
169 }
170
171 /* if we made it here, we handled the device one way or another */
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 dev_context *devc;
185
186 devc = sdi->priv;
187
188 if (devc->usb->devhdl == NULL)
189 return;
190
191 sr_info("hantek-dso: closing device %d on %d.%d interface %d", sdi->index,
192 devc->usb->bus, devc->usb->address, USB_INTERFACE);
193 libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
194 libusb_close(devc->usb->devhdl);
195 devc->usb->devhdl = NULL;
196 sdi->status = SR_ST_INACTIVE;
197
198}
199
200static int get_channel_offsets(struct dev_context *devc)
201{
202 GString *gs;
203 int chan, v, ret;
204
205 sr_dbg("hantek-dso: getting channel offsets");
206
207 ret = libusb_control_transfer(devc->usb->devhdl,
208 LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
209 CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
210 (unsigned char *)&devc->channel_levels,
211 sizeof(devc->channel_levels), 200);
212 if (ret != sizeof(devc->channel_levels)) {
213 sr_err("failed to get channel offsets: %d", ret);
214 return SR_ERR;
215 }
216
217 /* Comes in as 16-bit numbers with the second byte always 0 on
218 * the DSO-2090. Guessing this is supposed to be big-endian,
219 * since that's how voltage offsets are submitted back to the DSO.
220 * Convert to host order now, so we can use them natively.
221 */
222 for (chan = 0; chan < 2; chan++) {
223 for (v = 0; v < 9; v++) {
224 devc->channel_levels[chan][v][0] = g_ntohs(devc->channel_levels[chan][v][0]);
225 devc->channel_levels[chan][v][1] = g_ntohs(devc->channel_levels[chan][v][1]);
226 }
227 }
228
229 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
230 gs = g_string_sized_new(128);
231 for (chan = 0; chan < 2; chan++) {
232 g_string_printf(gs, "hantek-dso: CH%d:", chan + 1);
233 for (v = 0; v < 9; v++) {
234 g_string_append_printf(gs, " %.4x-%.4x",
235 devc->channel_levels[chan][v][0],
236 devc->channel_levels[chan][v][1]);
237 }
238 sr_dbg(gs->str);
239 }
240 g_string_free(gs, TRUE);
241 }
242
243 return SR_OK;
244}
245
246SR_PRIV int dso_set_trigger_samplerate(struct dev_context *devc)
247{
248 int ret, tmp;
249 uint8_t cmdstring[12];
250 uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
251 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
252 uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
253 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
254
255 sr_dbg("hantek-dso: preparing CMD_SET_TRIGGER_SAMPLERATE");
256
257 memset(cmdstring, 0, sizeof(cmdstring));
258 /* Command */
259 cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
260
261 /* Trigger source */
262 sr_dbg("hantek-dso: trigger source %s", devc->triggersource);
263 if (!strcmp("CH2", devc->triggersource))
264 tmp = 0;
265 else if (!strcmp("CH1", devc->triggersource))
266 tmp = 1;
267 else if (!strcmp("EXT", devc->triggersource))
268 tmp = 2;
269 else {
270 sr_err("hantek-dso: invalid trigger source %s", devc->triggersource);
271 return SR_ERR_ARG;
272 }
273 cmdstring[2] = tmp;
274
275 /* Frame size */
276 sr_dbg("hantek-dso: frame size %d", devc->framesize);
277 cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
278
279 /* Timebase fast */
280 sr_dbg("hantek-dso: time base index %d", devc->timebase);
281 switch (devc->framesize) {
282 case FRAMESIZE_SMALL:
283 if (devc->timebase < TIME_20us)
284 tmp = 0;
285 else if (devc->timebase == TIME_20us)
286 tmp = 1;
287 else if (devc->timebase == TIME_40us)
288 tmp = 2;
289 else if (devc->timebase == TIME_100us)
290 tmp = 3;
291 else if (devc->timebase >= TIME_200us)
292 tmp = 4;
293 break;
294 case FRAMESIZE_LARGE:
295 if (devc->timebase < TIME_40us) {
296 sr_err("hantek-dso: timebase < 40us only supported with 10K buffer");
297 return SR_ERR_ARG;
298 }
299 else if (devc->timebase == TIME_40us)
300 tmp = 0;
301 else if (devc->timebase == TIME_100us)
302 tmp = 2;
303 else if (devc->timebase == TIME_200us)
304 tmp = 3;
305 else if (devc->timebase >= TIME_400us)
306 tmp = 4;
307 break;
308 }
309 cmdstring[2] |= (tmp & 0x07) << 5;
310
311 /* Enabled channels: 00=CH1 01=CH2 10=both */
312 sr_dbg("hantek-dso: channels CH1=%d CH2=%d", devc->ch1_enabled, devc->ch2_enabled);
313 tmp = (((devc->ch2_enabled ? 1 : 0) << 1) + (devc->ch1_enabled ? 1 : 0)) - 1;
314 cmdstring[3] = tmp;
315
316 /* Fast rates channel */
317 /* TODO: is this right? */
318 tmp = devc->timebase < TIME_10us ? 1 : 0;
319 cmdstring[3] |= tmp << 2;
320
321 /* Trigger slope: 0=positive 1=negative */
322 /* TODO: does this work? */
323 sr_dbg("hantek-dso: trigger slope %d", devc->triggerslope);
324 cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
325
326 /* Timebase slow */
327 if (devc->timebase < TIME_100us)
328 tmp = 0;
329 else if (devc->timebase > TIME_400ms)
330 tmp = 0xffed;
331 else {
332 if (devc->framesize == FRAMESIZE_SMALL)
333 tmp = timebase_small[devc->timebase - 3];
334 else
335 tmp = timebase_large[devc->timebase - 3];
336 }
337 cmdstring[4] = tmp & 0xff;
338 cmdstring[5] = (tmp >> 8) & 0xff;
339
340 /* Horizontal trigger position */
341 sr_dbg("hantek-dso: trigger position %3.2f", devc->triggerposition);
342 tmp = 0x77fff + 0x8000 * devc->triggerposition;
343 cmdstring[6] = tmp & 0xff;
344 cmdstring[7] = (tmp >> 8) & 0xff;
345 cmdstring[10] = (tmp >> 16) & 0xff;
346
347 if (send_begin(devc) != SR_OK)
348 return SR_ERR;
349
350 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
351 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
352 cmdstring, sizeof(cmdstring),
353 &tmp, 100)) != 0) {
354 sr_err("Failed to set trigger/samplerate: %d", ret);
355 return SR_ERR;
356 }
357 sr_dbg("hantek-dso: sent CMD_SET_TRIGGER_SAMPLERATE");
358
359 return SR_OK;
360}
361
362SR_PRIV int dso_set_filters(struct dev_context *devc)
363{
364 int ret, tmp;
365 uint8_t cmdstring[8];
366
367 sr_dbg("hantek-dso: preparing CMD_SET_FILTERS");
368
369 memset(cmdstring, 0, sizeof(cmdstring));
370 cmdstring[0] = CMD_SET_FILTERS;
371 cmdstring[1] = 0x0f;
372 if (devc->filter_ch1) {
373 sr_dbg("hantek-dso: turning on CH1 filter");
374 cmdstring[2] |= 0x80;
375 }
376 if (devc->filter_ch2) {
377 sr_dbg("hantek-dso: turning on CH2 filter");
378 cmdstring[2] |= 0x40;
379 }
380 if (devc->filter_trigger) {
381 /* TODO: supported on the DSO-2090? */
382 sr_dbg("hantek-dso: turning on trigger filter");
383 cmdstring[2] |= 0x20;
384 }
385
386 if (send_begin(devc) != SR_OK)
387 return SR_ERR;
388
389 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
390 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
391 cmdstring, sizeof(cmdstring),
392 &tmp, 100)) != 0) {
393 sr_err("Failed to set filters: %d", ret);
394 return SR_ERR;
395 }
396 sr_dbg("hantek-dso: sent CMD_SET_FILTERS");
397
398 return SR_OK;
399}
400
401SR_PRIV int dso_set_voltage(struct dev_context *devc)
402{
403 int ret, tmp;
404 uint8_t cmdstring[8];
405
406 sr_dbg("hantek-dso: preparing CMD_SET_VOLTAGE");
407
408 memset(cmdstring, 0, sizeof(cmdstring));
409 cmdstring[0] = CMD_SET_VOLTAGE;
410 cmdstring[1] = 0x0f;
411 cmdstring[2] = 0x30;
412
413 /* CH1 volts/div is encoded in bits 0-1 */
414 sr_dbg("hantek-dso: CH1 vdiv index %d", devc->voltage_ch1);
415 switch (devc->voltage_ch1) {
416 case VDIV_1V:
417 case VDIV_100MV:
418 case VDIV_10MV:
419 cmdstring[2] |= 0x00;
420 break;
421 case VDIV_2V:
422 case VDIV_200MV:
423 case VDIV_20MV:
424 cmdstring[2] |= 0x01;
425 break;
426 case VDIV_5V:
427 case VDIV_500MV:
428 case VDIV_50MV:
429 cmdstring[2] |= 0x02;
430 break;
431 }
432
433 /* CH2 volts/div is encoded in bits 2-3 */
434 sr_dbg("hantek-dso: CH2 vdiv index %d", devc->voltage_ch2);
435 switch (devc->voltage_ch2) {
436 case VDIV_1V:
437 case VDIV_100MV:
438 case VDIV_10MV:
439 cmdstring[2] |= 0x00;
440 break;
441 case VDIV_2V:
442 case VDIV_200MV:
443 case VDIV_20MV:
444 cmdstring[2] |= 0x04;
445 break;
446 case VDIV_5V:
447 case VDIV_500MV:
448 case VDIV_50MV:
449 cmdstring[2] |= 0x08;
450 break;
451 }
452
453 if (send_begin(devc) != SR_OK)
454 return SR_ERR;
455
456 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
457 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
458 cmdstring, sizeof(cmdstring),
459 &tmp, 100)) != 0) {
460 sr_err("Failed to set voltage: %d", ret);
461 return SR_ERR;
462 }
463 sr_dbg("hantek-dso: sent CMD_SET_VOLTAGE");
464
465 return SR_OK;
466}
467
468SR_PRIV int dso_set_relays(struct dev_context *devc)
469{
470 GString *gs;
471 int ret, i;
472 uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
473 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
474
475 sr_dbg("hantek-dso: preparing CTRL_SETRELAYS");
476
477 if (devc->voltage_ch1 < VDIV_1V)
478 relays[1] = ~relays[1];
479
480 if (devc->voltage_ch1 < VDIV_100MV)
481 relays[2] = ~relays[2];
482
483 sr_dbg("hantek-dso: CH1 coupling %d", devc->coupling_ch1);
484 if (devc->coupling_ch1 != COUPLING_AC)
485 relays[3] = ~relays[3];
486
487 if (devc->voltage_ch2 < VDIV_1V)
488 relays[4] = ~relays[4];
489
490 if (devc->voltage_ch2 < VDIV_100MV)
491 relays[5] = ~relays[5];
492
493 sr_dbg("hantek-dso: CH2 coupling %d", devc->coupling_ch1);
494 if (devc->coupling_ch2 != COUPLING_AC)
495 relays[6] = ~relays[6];
496
497 if (!strcmp(devc->triggersource, "EXT"))
498 relays[7] = ~relays[7];
499
500 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
501 gs = g_string_sized_new(128);
502 g_string_printf(gs, "hantek-dso: relays:");
503 for (i = 0; i < 17; i++)
504 g_string_append_printf(gs, " %.2x", relays[i]);
505 sr_dbg(gs->str);
506 g_string_free(gs, TRUE);
507 }
508
509 if ((ret = libusb_control_transfer(devc->usb->devhdl,
510 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
511 0, 0, relays, 17, 100)) != sizeof(relays)) {
512 sr_err("failed to set relays: %d", ret);
513 return SR_ERR;
514 }
515 sr_dbg("hantek-dso: sent CTRL_SETRELAYS");
516
517 return SR_OK;
518}
519
520SR_PRIV int dso_set_voffsets(struct dev_context *devc)
521{
522 int offset, ret;
523 uint16_t *ch_levels;
524 uint8_t offsets[17];
525
526 sr_dbg("hantek-dso: preparing CTRL_SETOFFSET");
527
528 memset(offsets, 0, sizeof(offsets));
529 /* Channel 1 */
530 ch_levels = devc->channel_levels[0][devc->voltage_ch1];
531 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
532 offsets[0] = (offset >> 8) | 0x20;
533 offsets[1] = offset & 0xff;
534 sr_dbg("hantek-dso: CH1 offset %3.2f (%.2x%.2x)", devc->voffset_ch1,
535 offsets[0], offsets[1]);
536
537 /* Channel 2 */
538 ch_levels = devc->channel_levels[1][devc->voltage_ch2];
539 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
540 offsets[2] = (offset >> 8) | 0x20;
541 offsets[3] = offset & 0xff;
542 sr_dbg("hantek-dso: CH2 offset %3.2f (%.2x%.2x)", devc->voffset_ch2,
543 offsets[2], offsets[3]);
544
545 /* Trigger */
546 offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
547 offsets[4] = (offset >> 8) | 0x20;
548 offsets[5] = offset & 0xff;
549 sr_dbg("hantek-dso: trigger offset %3.2f (%.2x%.2x)", devc->voffset_trigger,
550 offsets[4], offsets[5]);
551
552 if ((ret = libusb_control_transfer(devc->usb->devhdl,
553 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
554 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
555 sr_err("failed to set offsets: %d", ret);
556 return SR_ERR;
557 }
558 sr_dbg("hantek-dso: sent CTRL_SETOFFSET");
559
560 return SR_OK;
561}
562
563SR_PRIV int dso_enable_trigger(struct dev_context *devc)
564{
565 int ret, tmp;
566 uint8_t cmdstring[2];
567
568 sr_dbg("hantek-dso: sending CMD_ENABLE_TRIGGER");
569
570 memset(cmdstring, 0, sizeof(cmdstring));
571 cmdstring[0] = CMD_ENABLE_TRIGGER;
572 cmdstring[1] = 0x00;
573
574 if (send_begin(devc) != SR_OK)
575 return SR_ERR;
576
577 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
578 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
579 cmdstring, sizeof(cmdstring),
580 &tmp, 100)) != 0) {
581 sr_err("Failed to enable trigger: %d", ret);
582 return SR_ERR;
583 }
584
585 return SR_OK;
586}
587
588SR_PRIV int dso_force_trigger(struct dev_context *devc)
589{
590 int ret, tmp;
591 uint8_t cmdstring[2];
592
593 sr_dbg("hantek-dso: sending CMD_FORCE_TRIGGER");
594
595 memset(cmdstring, 0, sizeof(cmdstring));
596 cmdstring[0] = CMD_FORCE_TRIGGER;
597 cmdstring[1] = 0x00;
598
599 if (send_begin(devc) != SR_OK)
600 return SR_ERR;
601
602 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
603 DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
604 cmdstring, sizeof(cmdstring),
605 &tmp, 100)) != 0) {
606 sr_err("Failed to force trigger: %d", ret);
607 return SR_ERR;
608 }
609
610 return SR_OK;
611}
612
613SR_PRIV int dso_init(struct dev_context *devc)
614{
615
616 sr_dbg("hantek-dso: initializing dso");
617
618 if (get_channel_offsets(devc) != SR_OK)
619 return SR_ERR;
620
621 if (dso_set_trigger_samplerate(devc) != SR_OK)
622 return SR_ERR;
623
624 if (dso_set_filters(devc) != SR_OK)
625 return SR_ERR;
626
627 if (dso_set_voltage(devc) != SR_OK)
628 return SR_ERR;
629
630 if (dso_set_relays(devc) != SR_OK)
631 return SR_ERR;
632
633 if (dso_set_voffsets(devc) != SR_OK)
634 return SR_ERR;
635
636 if (dso_enable_trigger(devc) != SR_OK)
637 return SR_ERR;
638
639 return SR_OK;
640}
641
642SR_PRIV int dso_get_capturestate(struct dev_context *devc, uint8_t *capturestate,
643 uint32_t *trigger_offset)
644{
645 int ret, tmp, i;
646 unsigned int bitvalue, toff;
647 uint8_t cmdstring[2], inbuf[512];
648
649 sr_dbg("hantek-dso: sending CMD_GET_CAPTURESTATE");
650
651 cmdstring[0] = CMD_GET_CAPTURESTATE;
652 cmdstring[1] = 0;
653
654 if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
655 sr_dbg("Failed to send get_capturestate command: %d", ret);
656 return SR_ERR;
657 }
658
659 if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
660 DSO_EP_IN | LIBUSB_ENDPOINT_IN,
661 inbuf, 512, &tmp, 100)) != 0) {
662 sr_dbg("Failed to get capturestate: %d", ret);
663 return SR_ERR;
664 }
665 *capturestate = inbuf[0];
666 toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
667
668 /* This conversion comes from the openhantek project.
669 * Each set bit in the 24-bit value inverts all bits with a lower
670 * value. No idea why the device reports the trigger point this way.
671 */
672 bitvalue = 1;
673 for (i = 0; i < 24; i++) {
674 /* Each set bit inverts all bits with a lower value. */
675 if(toff & bitvalue)
676 toff ^= bitvalue - 1;
677 bitvalue <<= 1;
678 }
679 *trigger_offset = toff;
680
681 return SR_OK;
682}
683
684SR_PRIV int dso_capture_start(struct dev_context *devc)
685{
686 int ret;
687 uint8_t cmdstring[2];
688
689 sr_dbg("hantek-dso: sending CMD_CAPTURE_START");
690
691 cmdstring[0] = CMD_CAPTURE_START;
692 cmdstring[1] = 0;
693
694 if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
695 sr_err("Failed to send capture_start command: %d", ret);
696 return SR_ERR;
697 }
698
699 return SR_OK;
700}
701
702SR_PRIV int dso_get_channeldata(struct dev_context *devc, libusb_transfer_cb_fn cb)
703{
704 struct libusb_transfer *transfer;
705 int num_transfers, ret, i;
706 uint8_t cmdstring[2];
707 unsigned char *buf;
708
709 sr_dbg("hantek-dso: sending CMD_GET_CHANNELDATA");
710
711 cmdstring[0] = CMD_GET_CHANNELDATA;
712 cmdstring[1] = 0;
713
714 if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
715 sr_err("Failed to get channel data: %d", ret);
716 return SR_ERR;
717 }
718
719 /* TODO: dso-2xxx only */
720 num_transfers = devc->framesize * sizeof(unsigned short) / devc->epin_maxpacketsize;
721 sr_dbg("hantek-dso: queueing up %d transfers", num_transfers);
722 for (i = 0; i < num_transfers; i++) {
723 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
724 sr_err("hantek-dso: %s: buf malloc failed", __func__);
725 return SR_ERR_MALLOC;
726 }
727 transfer = libusb_alloc_transfer(0);
728 libusb_fill_bulk_transfer(transfer, devc->usb->devhdl,
729 DSO_EP_IN | LIBUSB_ENDPOINT_IN, buf,
730 devc->epin_maxpacketsize, cb, devc, 40);
731 if ((ret = libusb_submit_transfer(transfer)) != 0) {
732 sr_err("failed to submit transfer: %d", ret);
733 /* TODO: Free them all. */
734 libusb_free_transfer(transfer);
735 g_free(buf);
736 return SR_ERR;
737 }
738 }
739
740 return SR_OK;
741}
742
Hardware access and backend lib