]> sigrok.org Git - libsigrok.git/blame_incremental - src/hardware/hantek-dso/protocol.c
projects / libsigrok.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
hantek-dso: dso2250: Fix capture runaway, only do the requested number of frames.
[libsigrok.git] / src / hardware / hantek-dso / protocol.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 "protocol.h"
29
30static int send_begin(const struct sr_dev_inst *sdi)
31{
32 struct sr_usb_dev_inst *usb;
33 int ret;
34 unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe,
35 0x00, 0x01, 0x00};
36
37 sr_dbg("Sending CTRL_BEGINCOMMAND.");
38
39 usb = sdi->conn;
40 if ((ret = libusb_control_transfer(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: %s.",
44 libusb_error_name(ret));
45 return SR_ERR;
46 }
47
48 return SR_OK;
49}
50
51static int send_bulkcmd(const struct sr_dev_inst *sdi, uint8_t *cmdstring, int cmdlen)
52{
53 struct sr_usb_dev_inst *usb;
54 int ret, tmp;
55
56 usb = sdi->conn;
57
58 if (send_begin(sdi) != SR_OK)
59 return SR_ERR;
60
61 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, cmdstring,
62 cmdlen, &tmp, 200)) != 0)
63 return SR_ERR;
64
65 return SR_OK;
66}
67
68static int dso_getmps(libusb_device *dev)
69{
70 struct libusb_device_descriptor des;
71 struct libusb_config_descriptor *conf_dsc;
72 const struct libusb_interface_descriptor *intf_dsc;
73 int mps;
74
75 libusb_get_device_descriptor(dev, &des);
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 struct dev_context *devc;
110 struct drv_context *drvc = sdi->driver->context;
111 struct sr_usb_dev_inst *usb;
112 struct libusb_device_descriptor des;
113 libusb_device **devlist;
114 int err, i;
115 char connection_id[64];
116
117 devc = sdi->priv;
118 usb = sdi->conn;
119
120 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
121 for (i = 0; devlist[i]; i++) {
122 libusb_get_device_descriptor(devlist[i], &des);
123
124 if (des.idVendor != devc->profile->fw_vid
125 || des.idProduct != devc->profile->fw_pid)
126 continue;
127
128 if ((sdi->status == SR_ST_INITIALIZING) ||
129 (sdi->status == SR_ST_INACTIVE)) {
130 /*
131 * Check device by its physical USB bus/port address.
132 */
133 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
134 if (strcmp(sdi->connection_id, connection_id))
135 /* This is not the one. */
136 continue;
137 }
138
139 if (!(err = libusb_open(devlist[i], &usb->devhdl))) {
140 if (usb->address == 0xff)
141 /*
142 * first time we touch this device after firmware upload,
143 * so we don't know the address yet.
144 */
145 usb->address = libusb_get_device_address(devlist[i]);
146
147 if (!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
148 sr_err("Wrong endpoint profile.");
149 else {
150 sdi->status = SR_ST_ACTIVE;
151 sr_info("Opened device on %d.%d (logical) / "
152 "%s (physical) interface %d.",
153 usb->bus, usb->address,
154 sdi->connection_id, USB_INTERFACE);
155 }
156 } else {
157 sr_err("Failed to open device: %s.",
158 libusb_error_name(err));
159 }
160
161 /* If we made it here, we handled the device (somehow). */
162 break;
163 }
164 libusb_free_device_list(devlist, 1);
165
166 if (sdi->status != SR_ST_ACTIVE)
167 return SR_ERR;
168
169 return SR_OK;
170}
171
172SR_PRIV void dso_close(struct sr_dev_inst *sdi)
173{
174 struct sr_usb_dev_inst *usb;
175
176 usb = sdi->conn;
177
178 if (!usb->devhdl)
179 return;
180
181 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
182 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
183 libusb_release_interface(usb->devhdl, USB_INTERFACE);
184 libusb_close(usb->devhdl);
185 usb->devhdl = NULL;
186 sdi->status = SR_ST_INACTIVE;
187
188}
189
190static int get_channel_offsets(const struct sr_dev_inst *sdi)
191{
192 struct dev_context *devc;
193 struct sr_usb_dev_inst *usb;
194 GString *gs;
195 int chan, v, ret;
196
197 sr_dbg("Getting channel offsets.");
198
199 devc = sdi->priv;
200 usb = sdi->conn;
201
202 ret = libusb_control_transfer(usb->devhdl,
203 LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
204 CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
205 (unsigned char *)&devc->channel_levels,
206 sizeof(devc->channel_levels), 200);
207 if (ret != sizeof(devc->channel_levels)) {
208 sr_err("Failed to get channel offsets: %s.",
209 libusb_error_name(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 < NUM_CHANNELS; chan++) {
219 for (v = 0; v < 9; v++) {
220 devc->channel_levels[chan][v][0] =
221 g_ntohs(devc->channel_levels[chan][v][0]);
222 devc->channel_levels[chan][v][1] =
223 g_ntohs(devc->channel_levels[chan][v][1]);
224 }
225 }
226
227 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
228 gs = g_string_sized_new(128);
229 for (chan = 0; chan < NUM_CHANNELS; chan++) {
230 g_string_printf(gs, "CH%d:", chan + 1);
231 for (v = 0; v < 9; v++) {
232 g_string_append_printf(gs, " %.4x-%.4x",
233 devc->channel_levels[chan][v][0],
234 devc->channel_levels[chan][v][1]);
235 }
236 sr_dbg("%s", gs->str);
237 }
238 g_string_free(gs, TRUE);
239 }
240
241 return SR_OK;
242}
243
244
245static void dso2250_set_triggerpos(int value, int long_buffer, uint8_t dest[], int offset)
246{
247 uint32_t min, max;
248 uint32_t tmp, diff;
249
250 min = long_buffer ? 0 : 0x7d7ff;
251 max = 0x7ffff;
252
253 diff = max - min;
254 tmp = min + diff * value / 100;
255 sr_dbg("2250 trigger pos: %3d%% * [0x%x,0x%x] == 0x%x", value, min, max, tmp);
256
257 dest[offset + 0] = tmp & 0xff;
258 dest[offset + 1] = (tmp >> 8) & 0xff;
259 dest[offset + 2] = (tmp >> 16) & 0x7;
260}
261
262
263/* See http://openhantek.sourceforge.net/doc/namespaceHantek.html#ac1cd181814cf3da74771c29800b39028 */
264static int dso2250_set_trigger_samplerate(const struct sr_dev_inst *sdi)
265{
266 struct dev_context *devc;
267 struct sr_usb_dev_inst *usb;
268 int ret, tmp;
269 int base;
270 uint8_t cmdstring[12];
271 int trig;
272
273
274 devc = sdi->priv;
275 usb = sdi->conn;
276
277 memset(cmdstring, 0, sizeof(cmdstring));
278 /* Command */
279 cmdstring[0] = CMD_2250_SET_TRIGGERSOURCE;
280 sr_dbg("Trigger source %s.", devc->triggersource);
281 if (!strcmp("CH2", devc->triggersource))
282 tmp = 3;
283 else if (!strcmp("CH1", devc->triggersource))
284 tmp = 2;
285 else if (!strcmp("EXT", devc->triggersource))
286 tmp = 0;
287 else {
288 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
289 return SR_ERR_ARG;
290 }
291 cmdstring[2] = tmp;
292
293
294 sr_dbg("Trigger slope: %d.", devc->triggerslope);
295 cmdstring[2] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
296
297 if (send_begin(sdi) != SR_OK)
298 return SR_ERR;
299
300 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
301 cmdstring, 8, &tmp, 100)) != 0) {
302 sr_err("Failed to set trigger/samplerate: %s.",
303 libusb_error_name(ret));
304 return SR_ERR;
305 }
306
307
308 /* Frame size */
309 sr_dbg("Frame size: %d.", devc->framesize);
310 cmdstring[0] = CMD_2250_SET_RECORD_LENGTH;
311 cmdstring[2] = devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02;
312
313 if (send_begin(sdi) != SR_OK)
314 return SR_ERR;
315
316 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
317 cmdstring, 4, &tmp, 100)) != 0) {
318 sr_err("Failed to set record length: %s.",
319 libusb_error_name(ret));
320 return SR_ERR;
321 }
322
323
324 memset(cmdstring, 0, sizeof(cmdstring));
325 cmdstring[0] = CMD_2250_SET_SAMPLERATE;
326 sr_dbg("Sample rate: %u", devc->samplerate);
327 base = 100e6;
328 if (devc->samplerate > base) {
329 /* Timebase fast */
330 sr_err("Sample rate > 100MHz not yet supported.");
331 return SR_ERR_ARG;
332 }
333
334 tmp = base / devc->samplerate;
335 sr_dbg("sample rate value: %d.", devc->samplerate);
336 if (tmp) {
337 /* Downsampling on */
338 cmdstring[2] |= 2;
339 /* Downsampler = 1comp((Base / Samplerate) - 2)
340 * Base == 100Msa resp. 200MSa
341 *
342 * Example for 500kSa/s:
343 * 100e6 / 500e3 => 200
344 * 200 - 2 => 198
345 * 1comp(198) => ff39 */
346 tmp -= 2;
347 tmp = ~tmp;
348 sr_dbg("down sampler value: 0x%x.", tmp & 0xffff);
349 cmdstring[4] = (tmp >> 0) & 0xff;
350 cmdstring[5] = (tmp >> 8) & 0xff;
351 }
352
353 if (send_begin(sdi) != SR_OK)
354 return SR_ERR;
355
356 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
357 cmdstring, 8, &tmp, 100)) != 0) {
358 sr_err("Failed to set sample rate: %s.",
359 libusb_error_name(ret));
360 return SR_ERR;
361 }
362 sr_dbg("Sent CMD_2250_SET_SAMPLERATE.");
363
364
365 /* Enabled channels: 00=CH1 01=CH2 10=both */
366 memset(cmdstring, 0, sizeof(cmdstring));
367 cmdstring[0] = CMD_2250_SET_CHANNELS;
368 sr_dbg("Channels CH1=%d CH2=%d", devc->ch_enabled[0], devc->ch_enabled[1]);
369 cmdstring[2] = (devc->ch_enabled[0] ? 0 : 1) + (devc->ch_enabled[1] ? 2 : 0);
370
371 if (send_begin(sdi) != SR_OK)
372 return SR_ERR;
373
374 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
375 cmdstring, 4, &tmp, 100)) != 0) {
376 sr_err("Failed to set channels: %s.",
377 libusb_error_name(ret));
378 return SR_ERR;
379 }
380 sr_dbg("Sent CMD_2250_SET_CHANNELS.");
381
382
383
384 /* Trigger slope: 0=positive 1=negative */
385 memset(cmdstring, 0, sizeof(cmdstring));
386 cmdstring[0] = CMD_2250_SET_TRIGGERPOS_AND_BUFFER;
387
388 sr_dbg("Capture ratio: %d.", devc->capture_ratio);
389 trig = devc->capture_ratio;
390 dso2250_set_triggerpos(trig,
391 devc->framesize != FRAMESIZE_SMALL, cmdstring, 2);
392 dso2250_set_triggerpos(100 - trig,
393 devc->framesize != FRAMESIZE_SMALL, cmdstring, 6);
394
395 if (send_begin(sdi) != SR_OK)
396 return SR_ERR;
397
398 /* TODO: 12 bytes according to documentation? */
399 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
400 cmdstring, 10, &tmp, 100)) != 0) {
401 sr_err("Failed to set trigger position: %s.",
402 libusb_error_name(ret));
403 return SR_ERR;
404 }
405
406 return SR_OK;
407}
408
409int dso_set_trigger_samplerate(const struct sr_dev_inst *sdi)
410{
411 struct dev_context *devc;
412 struct sr_usb_dev_inst *usb;
413 int ret, tmp;
414 uint8_t cmdstring[12];
415 uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
416 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
417 uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
418 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
419
420 devc = sdi->priv;
421 if (devc->profile->fw_pid == 0x2250)
422 return dso2250_set_trigger_samplerate(sdi);
423
424 sr_dbg("Preparing CMD_SET_TRIGGER_SAMPLERATE.");
425
426 usb = sdi->conn;
427
428 memset(cmdstring, 0, sizeof(cmdstring));
429 /* Command */
430 cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
431
432 /* Trigger source */
433 sr_dbg("Trigger source %s.", devc->triggersource);
434 if (!strcmp("CH2", devc->triggersource))
435 tmp = 0;
436 else if (!strcmp("CH1", devc->triggersource))
437 tmp = 1;
438 else if (!strcmp("EXT", devc->triggersource))
439 tmp = 2;
440 else {
441 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
442 return SR_ERR_ARG;
443 }
444 cmdstring[2] = tmp;
445
446 /* Frame size */
447 sr_dbg("Frame size: %d.", devc->framesize);
448 cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
449
450 /* Timebase fast */
451 sr_dbg("Time base index: %d.", devc->timebase);
452 if (devc->framesize == FRAMESIZE_SMALL) {
453 if (devc->timebase < TIME_20us)
454 tmp = 0;
455 else if (devc->timebase == TIME_20us)
456 tmp = 1;
457 else if (devc->timebase == TIME_40us)
458 tmp = 2;
459 else if (devc->timebase == TIME_100us)
460 tmp = 3;
461 else if (devc->timebase >= TIME_200us)
462 tmp = 4;
463 } else {
464 if (devc->timebase < TIME_40us) {
465 sr_err("Timebase < 40us only supported with 10K buffer.");
466 return SR_ERR_ARG;
467 }
468 else if (devc->timebase == TIME_40us)
469 tmp = 0;
470 else if (devc->timebase == TIME_100us)
471 tmp = 2;
472 else if (devc->timebase == TIME_200us)
473 tmp = 3;
474 else if (devc->timebase >= TIME_400us)
475 tmp = 4;
476 }
477 cmdstring[2] |= (tmp & 0x07) << 5;
478
479 /* Enabled channels: 00=CH1 01=CH2 10=both */
480 sr_dbg("Channels CH1=%d CH2=%d", devc->ch_enabled[0], devc->ch_enabled[1]);
481 tmp = (((devc->ch_enabled[1] ? 1 : 0) << 1) + (devc->ch_enabled[0] ? 1 : 0)) - 1;
482 cmdstring[3] = tmp;
483
484 /* Fast rates channel */
485 /* TODO: Is this right? */
486 tmp = devc->timebase < TIME_10us ? 1 : 0;
487 cmdstring[3] |= tmp << 2;
488
489 /* Trigger slope: 0=positive 1=negative */
490 /* TODO: Does this work? */
491 sr_dbg("Trigger slope: %d.", devc->triggerslope);
492 cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
493
494 /* Timebase slow */
495 if (devc->timebase < TIME_100us)
496 tmp = 0;
497 else if (devc->timebase > TIME_400ms)
498 tmp = 0xffed;
499 else {
500 if (devc->framesize == FRAMESIZE_SMALL)
501 tmp = timebase_small[devc->timebase - 3];
502 else
503 tmp = timebase_large[devc->timebase - 3];
504 }
505 cmdstring[4] = tmp & 0xff;
506 cmdstring[5] = (tmp >> 8) & 0xff;
507
508 /* Horizontal trigger position */
509 sr_dbg("Capture ratio: %d.", devc->capture_ratio);
510 tmp = 0x77fff + 0x8000 * devc->capture_ratio / 100;
511 cmdstring[6] = tmp & 0xff;
512 cmdstring[7] = (tmp >> 8) & 0xff;
513 cmdstring[10] = (tmp >> 16) & 0xff;
514
515 if (send_begin(sdi) != SR_OK)
516 return SR_ERR;
517
518 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
519 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
520 sr_err("Failed to set trigger/samplerate: %s.",
521 libusb_error_name(ret));
522 return SR_ERR;
523 }
524 sr_dbg("Sent CMD_SET_TRIGGER_SAMPLERATE.");
525
526 return SR_OK;
527}
528
529
530static int dso_set_filters(const struct sr_dev_inst *sdi)
531{
532 struct dev_context *devc;
533 struct sr_usb_dev_inst *usb;
534 int ret, tmp;
535 uint8_t cmdstring[8];
536
537 sr_dbg("Preparing CMD_SET_FILTERS.");
538
539 devc = sdi->priv;
540 usb = sdi->conn;
541
542 memset(cmdstring, 0, sizeof(cmdstring));
543 cmdstring[0] = CMD_SET_FILTERS;
544 cmdstring[1] = 0x0f;
545 if (devc->filter[0]) {
546 sr_dbg("Turning on CH1 filter.");
547 cmdstring[2] |= 0x80;
548 }
549 if (devc->filter[1]) {
550 sr_dbg("Turning on CH2 filter.");
551 cmdstring[2] |= 0x40;
552 }
553 /*
554 * Not supported: filtering on the trigger
555 * cmdstring[2] |= 0x20;
556 */
557
558 if (send_begin(sdi) != SR_OK)
559 return SR_ERR;
560
561 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
562 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
563 sr_err("Failed to set filters: %s.", libusb_error_name(ret));
564 return SR_ERR;
565 }
566 sr_dbg("Sent CMD_SET_FILTERS.");
567
568 return SR_OK;
569}
570
571static int dso_set_voltage(const struct sr_dev_inst *sdi)
572{
573 struct dev_context *devc;
574 struct sr_usb_dev_inst *usb;
575 int ret, tmp;
576 uint8_t cmdstring[8];
577
578 sr_dbg("Preparing CMD_SET_VOLTAGE.");
579
580 devc = sdi->priv;
581 usb = sdi->conn;
582
583 memset(cmdstring, 0, sizeof(cmdstring));
584 cmdstring[0] = CMD_SET_VOLTAGE;
585
586 if (devc->profile->fw_pid == 0x2250) {
587 cmdstring[2] = 0x08;
588 } else {
589 cmdstring[1] = 0x0f;
590 cmdstring[2] = 0x30;
591 }
592
593 /* CH1 volts/div is encoded in bits 0-1 */
594 sr_dbg("CH1 vdiv index: %d.", devc->voltage[0]);
595 switch (devc->voltage[0]) {
596 case VDIV_1V:
597 case VDIV_100MV:
598 case VDIV_10MV:
599 cmdstring[2] |= 0x00;
600 break;
601 case VDIV_2V:
602 case VDIV_200MV:
603 case VDIV_20MV:
604 cmdstring[2] |= 0x01;
605 break;
606 case VDIV_5V:
607 case VDIV_500MV:
608 case VDIV_50MV:
609 cmdstring[2] |= 0x02;
610 break;
611 }
612
613 /* CH2 volts/div is encoded in bits 2-3 */
614 sr_dbg("CH2 vdiv index: %d.", devc->voltage[1]);
615 switch (devc->voltage[1]) {
616 case VDIV_1V:
617 case VDIV_100MV:
618 case VDIV_10MV:
619 cmdstring[2] |= 0x00;
620 break;
621 case VDIV_2V:
622 case VDIV_200MV:
623 case VDIV_20MV:
624 cmdstring[2] |= 0x04;
625 break;
626 case VDIV_5V:
627 case VDIV_500MV:
628 case VDIV_50MV:
629 cmdstring[2] |= 0x08;
630 break;
631 }
632
633 if (send_begin(sdi) != SR_OK)
634 return SR_ERR;
635
636 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
637 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
638 sr_err("Failed to set voltage: %s.", libusb_error_name(ret));
639 return SR_ERR;
640 }
641 sr_dbg("Sent CMD_SET_VOLTAGE.");
642
643 return SR_OK;
644}
645
646static int dso_set_relays(const struct sr_dev_inst *sdi)
647{
648 struct dev_context *devc;
649 struct sr_usb_dev_inst *usb;
650 GString *gs;
651 int ret, i;
652 uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
653 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
654
655 sr_dbg("Preparing CTRL_SETRELAYS.");
656
657 devc = sdi->priv;
658 usb = sdi->conn;
659
660 if (devc->voltage[0] < VDIV_1V)
661 relays[1] = ~relays[1];
662
663 if (devc->voltage[0] < VDIV_100MV)
664 relays[2] = ~relays[2];
665
666 sr_dbg("CH1 coupling: %d.", devc->coupling[0]);
667 if (devc->coupling[0] != COUPLING_AC)
668 relays[3] = ~relays[3];
669
670 if (devc->voltage[1] < VDIV_1V)
671 relays[4] = ~relays[4];
672
673 if (devc->voltage[1] < VDIV_100MV)
674 relays[5] = ~relays[5];
675
676 sr_dbg("CH2 coupling: %d.", devc->coupling[1]);
677 if (devc->coupling[1] != COUPLING_AC)
678 relays[6] = ~relays[6];
679
680 if (!strcmp(devc->triggersource, "EXT"))
681 relays[7] = ~relays[7];
682
683 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
684 gs = g_string_sized_new(128);
685 g_string_printf(gs, "Relays:");
686 for (i = 0; i < 17; i++)
687 g_string_append_printf(gs, " %.2x", relays[i]);
688 sr_dbg("%s", gs->str);
689 g_string_free(gs, TRUE);
690 }
691
692 if ((ret = libusb_control_transfer(usb->devhdl,
693 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
694 0, 0, relays, 17, 100)) != sizeof(relays)) {
695 sr_err("Failed to set relays: %s.", libusb_error_name(ret));
696 return SR_ERR;
697 }
698 sr_dbg("Sent CTRL_SETRELAYS.");
699
700 return SR_OK;
701}
702
703int dso_set_voffsets(const struct sr_dev_inst *sdi)
704{
705 struct dev_context *devc;
706 struct sr_usb_dev_inst *usb;
707 int offset, ret;
708 uint16_t *ch_levels;
709 uint8_t offsets[17];
710
711 sr_dbg("Preparing CTRL_SETOFFSET.");
712
713 devc = sdi->priv;
714 usb = sdi->conn;
715
716 memset(offsets, 0, sizeof(offsets));
717 /* Channel 1 */
718 ch_levels = devc->channel_levels[0][devc->voltage[0]];
719 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
720 offsets[0] = (offset >> 8) | 0x20;
721 offsets[1] = offset & 0xff;
722 sr_dbg("CH1 offset: %3.2f (%.2x%.2x).", devc->voffset_ch1,
723 offsets[0], offsets[1]);
724
725 /* Channel 2 */
726 ch_levels = devc->channel_levels[1][devc->voltage[1]];
727 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
728 offsets[2] = (offset >> 8) | 0x20;
729 offsets[3] = offset & 0xff;
730 sr_dbg("CH2 offset: %3.2f (%.2x%.2x).", devc->voffset_ch2,
731 offsets[2], offsets[3]);
732
733 /* Trigger */
734 offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
735 offsets[4] = (offset >> 8) | 0x20;
736 offsets[5] = offset & 0xff;
737 sr_dbg("Trigger offset: %3.2f (%.2x%.2x).", devc->voffset_trigger,
738 offsets[4], offsets[5]);
739
740 if ((ret = libusb_control_transfer(usb->devhdl,
741 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
742 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
743 sr_err("Failed to set offsets: %s.", libusb_error_name(ret));
744 return SR_ERR;
745 }
746 sr_dbg("Sent CTRL_SETOFFSET.");
747
748 return SR_OK;
749}
750
751SR_PRIV int dso_enable_trigger(const struct sr_dev_inst *sdi)
752{
753 struct sr_usb_dev_inst *usb;
754 int ret, tmp;
755 uint8_t cmdstring[2];
756
757 sr_dbg("Sending CMD_ENABLE_TRIGGER.");
758
759 usb = sdi->conn;
760
761 memset(cmdstring, 0, sizeof(cmdstring));
762 cmdstring[0] = CMD_ENABLE_TRIGGER;
763 cmdstring[1] = 0x00;
764
765 if (send_begin(sdi) != SR_OK)
766 return SR_ERR;
767
768 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
769 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
770 sr_err("Failed to enable trigger: %s.", libusb_error_name(ret));
771 return SR_ERR;
772 }
773
774 return SR_OK;
775}
776
777SR_PRIV int dso_force_trigger(const struct sr_dev_inst *sdi)
778{
779 struct sr_usb_dev_inst *usb;
780 int ret, tmp;
781 uint8_t cmdstring[2];
782
783 sr_dbg("Sending CMD_FORCE_TRIGGER.");
784
785 usb = sdi->conn;
786
787 memset(cmdstring, 0, sizeof(cmdstring));
788 cmdstring[0] = CMD_FORCE_TRIGGER;
789 cmdstring[1] = 0x00;
790
791 if (send_begin(sdi) != SR_OK)
792 return SR_ERR;
793
794 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
795 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
796 sr_err("Failed to force trigger: %s.", libusb_error_name(ret));
797 return SR_ERR;
798 }
799
800 return SR_OK;
801}
802
803SR_PRIV int dso_init(const struct sr_dev_inst *sdi)
804{
805
806 sr_dbg("Initializing DSO.");
807
808 if (get_channel_offsets(sdi) != SR_OK)
809 return SR_ERR;
810
811 if (dso_set_trigger_samplerate(sdi) != SR_OK)
812 return SR_ERR;
813
814 if (dso_set_filters(sdi) != SR_OK)
815 return SR_ERR;
816
817 if (dso_set_voltage(sdi) != SR_OK)
818 return SR_ERR;
819
820 if (dso_set_relays(sdi) != SR_OK)
821 return SR_ERR;
822
823 if (dso_set_voffsets(sdi) != SR_OK)
824 return SR_ERR;
825
826 if (dso_enable_trigger(sdi) != SR_OK)
827 return SR_ERR;
828
829 return SR_OK;
830}
831
832SR_PRIV int dso_get_capturestate(const struct sr_dev_inst *sdi,
833 uint8_t *capturestate, uint32_t *trigger_offset)
834{
835 struct sr_usb_dev_inst *usb;
836 int ret, tmp, i;
837 unsigned int bitvalue, toff;
838 uint8_t cmdstring[2], inbuf[512];
839
840 sr_dbg("Sending CMD_GET_CAPTURESTATE.");
841
842 usb = sdi->conn;
843
844 cmdstring[0] = CMD_GET_CAPTURESTATE;
845 cmdstring[1] = 0;
846
847 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
848 sr_dbg("Failed to send get_capturestate command: %s.",
849 libusb_error_name(ret));
850 return SR_ERR;
851 }
852
853 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_IN,
854 inbuf, 512, &tmp, 100)) != 0) {
855 sr_dbg("Failed to get capturestate: %s.",
856 libusb_error_name(ret));
857 return SR_ERR;
858 }
859 *capturestate = inbuf[0];
860 toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
861
862 /*
863 * This conversion comes from the openhantek project.
864 * Each set bit in the 24-bit value inverts all bits with a lower
865 * value. No idea why the device reports the trigger point this way.
866 */
867 bitvalue = 1;
868 for (i = 0; i < 24; i++) {
869 /* Each set bit inverts all bits with a lower value. */
870 if (toff & bitvalue)
871 toff ^= bitvalue - 1;
872 bitvalue <<= 1;
873 }
874 *trigger_offset = toff;
875
876 return SR_OK;
877}
878
879SR_PRIV int dso_capture_start(const struct sr_dev_inst *sdi)
880{
881 int ret;
882 uint8_t cmdstring[2];
883
884 sr_dbg("Sending CMD_CAPTURE_START.");
885
886 cmdstring[0] = CMD_CAPTURE_START;
887 cmdstring[1] = 0;
888
889 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
890 sr_err("Failed to send capture_start command: %s.",
891 libusb_error_name(ret));
892 return SR_ERR;
893 }
894
895 return SR_OK;
896}
897
898SR_PRIV int dso_get_channeldata(const struct sr_dev_inst *sdi,
899 libusb_transfer_cb_fn cb)
900{
901 struct dev_context *devc;
902 struct sr_usb_dev_inst *usb;
903 struct libusb_transfer *transfer;
904 int num_transfers, ret, i;
905 uint8_t cmdstring[2];
906 unsigned char *buf;
907
908 sr_dbg("Sending CMD_GET_CHANNELDATA.");
909
910 devc = sdi->priv;
911 usb = sdi->conn;
912
913 cmdstring[0] = CMD_GET_CHANNELDATA;
914 cmdstring[1] = 0;
915
916 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
917 sr_err("Failed to get channel data: %s.",
918 libusb_error_name(ret));
919 return SR_ERR;
920 }
921
922 /* TODO: DSO-2xxx only. */
923 num_transfers = devc->framesize *
924 sizeof(unsigned short) / devc->epin_maxpacketsize;
925 sr_dbg("Queueing up %d transfers.", num_transfers);
926 for (i = 0; i < num_transfers; i++) {
927 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
928 sr_err("Failed to malloc USB endpoint buffer.");
929 return SR_ERR_MALLOC;
930 }
931 transfer = libusb_alloc_transfer(0);
932 libusb_fill_bulk_transfer(transfer, usb->devhdl, DSO_EP_IN, buf,
933 devc->epin_maxpacketsize, cb, (void *)sdi, 40);
934 if ((ret = libusb_submit_transfer(transfer)) != 0) {
935 sr_err("Failed to submit transfer: %s.",
936 libusb_error_name(ret));
937 /* TODO: Free them all. */
938 libusb_free_transfer(transfer);
939 g_free(buf);
940 return SR_ERR;
941 }
942 }
943
944 return SR_OK;
945}
Hardware access and backend lib