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Ensure device is closed before usb_get_port_path()
[libsigrok.git] / src / hardware / hantek-dso / protocol.c
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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 <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
189static int get_channel_offsets(const struct sr_dev_inst *sdi)
190{
191 struct dev_context *devc;
192 struct sr_usb_dev_inst *usb;
193 GString *gs;
194 int chan, v, ret;
195
196 sr_dbg("Getting channel offsets.");
197
198 devc = sdi->priv;
199 usb = sdi->conn;
200
201 ret = libusb_control_transfer(usb->devhdl,
202 LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
203 CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
204 (unsigned char *)&devc->channel_levels,
205 sizeof(devc->channel_levels), 200);
206 if (ret != sizeof(devc->channel_levels)) {
207 sr_err("Failed to get channel offsets: %s.",
208 libusb_error_name(ret));
209 return SR_ERR;
210 }
211
212 /* Comes in as 16-bit numbers with the second byte always 0 on
213 * the DSO-2090. Guessing this is supposed to be big-endian,
214 * since that's how voltage offsets are submitted back to the DSO.
215 * Convert to host order now, so we can use them natively.
216 */
217 for (chan = 0; chan < NUM_CHANNELS; chan++) {
218 for (v = 0; v < 9; v++) {
219 devc->channel_levels[chan][v][0] =
220 g_ntohs(devc->channel_levels[chan][v][0]);
221 devc->channel_levels[chan][v][1] =
222 g_ntohs(devc->channel_levels[chan][v][1]);
223 }
224 }
225
226 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
227 gs = g_string_sized_new(128);
228 for (chan = 0; chan < NUM_CHANNELS; chan++) {
229 g_string_printf(gs, "CH%d:", chan + 1);
230 for (v = 0; v < 9; v++) {
231 g_string_append_printf(gs, " %.4x-%.4x",
232 devc->channel_levels[chan][v][0],
233 devc->channel_levels[chan][v][1]);
234 }
235 sr_dbg("%s", gs->str);
236 }
237 g_string_free(gs, TRUE);
238 }
239
240 return SR_OK;
241}
242
243static void dso2250_set_triggerpos(int value, int long_buffer, uint8_t dest[], int offset)
244{
245 uint32_t min, max;
246 uint32_t tmp, diff;
247
248 min = long_buffer ? 0 : 0x7d7ff;
249 max = 0x7ffff;
250
251 diff = max - min;
252 tmp = min + diff * value / 100;
253 sr_dbg("2250 trigger pos: %3d%% * [0x%x,0x%x] == 0x%x", value, min, max, tmp);
254
255 dest[offset + 0] = tmp & 0xff;
256 dest[offset + 1] = (tmp >> 8) & 0xff;
257 dest[offset + 2] = (tmp >> 16) & 0x7;
258}
259
260/* See http://openhantek.sourceforge.net/doc/namespaceHantek.html#ac1cd181814cf3da74771c29800b39028 */
261static int dso2250_set_trigger_samplerate(const struct sr_dev_inst *sdi)
262{
263 struct dev_context *devc;
264 struct sr_usb_dev_inst *usb;
265 int ret, tmp;
266 uint64_t base;
267 uint8_t cmdstring[12];
268 int trig;
269
270 devc = sdi->priv;
271 usb = sdi->conn;
272
273 memset(cmdstring, 0, sizeof(cmdstring));
274 /* Command */
275 cmdstring[0] = CMD_2250_SET_TRIGGERSOURCE;
276 sr_dbg("Trigger source %s.", devc->triggersource);
277 if (!strcmp("CH2", devc->triggersource))
278 tmp = 3;
279 else if (!strcmp("CH1", devc->triggersource))
280 tmp = 2;
281 else if (!strcmp("EXT", devc->triggersource))
282 tmp = 0;
283 else {
284 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
285 return SR_ERR_ARG;
286 }
287 cmdstring[2] = tmp;
288
289 sr_dbg("Trigger slope: %d.", devc->triggerslope);
290 cmdstring[2] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
291
292 if (send_begin(sdi) != SR_OK)
293 return SR_ERR;
294
295 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
296 cmdstring, 8, &tmp, 100)) != 0) {
297 sr_err("Failed to set trigger/samplerate: %s.",
298 libusb_error_name(ret));
299 return SR_ERR;
300 }
301
302 /* Frame size */
303 sr_dbg("Frame size: %d.", devc->framesize);
304 cmdstring[0] = CMD_2250_SET_RECORD_LENGTH;
305 cmdstring[2] = (devc->framesize == FRAMESIZE_SMALL) ? 0x01 : 0x02;
306
307 if (send_begin(sdi) != SR_OK)
308 return SR_ERR;
309
310 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
311 cmdstring, 4, &tmp, 100)) != 0) {
312 sr_err("Failed to set record length: %s.",
313 libusb_error_name(ret));
314 return SR_ERR;
315 }
316
317 memset(cmdstring, 0, sizeof(cmdstring));
318 cmdstring[0] = CMD_2250_SET_SAMPLERATE;
319 base = 100e6;
320 if (devc->samplerate > base) {
321 /* Timebase fast */
322 sr_err("Sample rate > 100MHz not yet supported.");
323 return SR_ERR_ARG;
324 }
325
326 tmp = base / devc->samplerate;
327 if (tmp) {
328 /* Downsampling on */
329 cmdstring[2] |= 2;
330 /* Downsampler = 1comp((Base / Samplerate) - 2)
331 * Base == 100Msa resp. 200MSa
332 *
333 * Example for 500kSa/s:
334 * 100e6 / 500e3 => 200
335 * 200 - 2 => 198
336 * 1comp(198) => ff39 */
337 tmp -= 2;
338 tmp = ~tmp;
339 sr_dbg("Down sampler value: 0x%x.", tmp & 0xffff);
340 cmdstring[4] = (tmp >> 0) & 0xff;
341 cmdstring[5] = (tmp >> 8) & 0xff;
342 }
343
344 if (send_begin(sdi) != SR_OK)
345 return SR_ERR;
346
347 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
348 cmdstring, 8, &tmp, 100)) != 0) {
349 sr_err("Failed to set sample rate: %s.",
350 libusb_error_name(ret));
351 return SR_ERR;
352 }
353 sr_dbg("Sent CMD_2250_SET_SAMPLERATE.");
354
355 /* Enabled channels: 00=CH1, 01=CH2, 10=both. */
356 memset(cmdstring, 0, sizeof(cmdstring));
357 cmdstring[0] = CMD_2250_SET_CHANNELS;
358 sr_dbg("Channels: CH1=%d, CH2=%d.", devc->ch_enabled[0], devc->ch_enabled[1]);
359 cmdstring[2] = (devc->ch_enabled[0] ? 0 : 1) + (devc->ch_enabled[1] ? 2 : 0);
360
361 if (send_begin(sdi) != SR_OK)
362 return SR_ERR;
363
364 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
365 cmdstring, 4, &tmp, 100)) != 0) {
366 sr_err("Failed to set channels: %s.",
367 libusb_error_name(ret));
368 return SR_ERR;
369 }
370 sr_dbg("Sent CMD_2250_SET_CHANNELS.");
371
372 /* Trigger slope: 0=positive, 1=negative. */
373 memset(cmdstring, 0, sizeof(cmdstring));
374 cmdstring[0] = CMD_2250_SET_TRIGGERPOS_AND_BUFFER;
375
376 sr_dbg("Capture ratio: %" PRIu64 ".", devc->capture_ratio);
377 trig = devc->capture_ratio;
378 dso2250_set_triggerpos(trig,
379 devc->framesize != FRAMESIZE_SMALL, cmdstring, 2);
380 dso2250_set_triggerpos(100 - trig,
381 devc->framesize != FRAMESIZE_SMALL, cmdstring, 6);
382
383 if (send_begin(sdi) != SR_OK)
384 return SR_ERR;
385
386 /* TODO: 12 bytes according to documentation? */
387 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
388 cmdstring, 10, &tmp, 100)) != 0) {
389 sr_err("Failed to set trigger position: %s.",
390 libusb_error_name(ret));
391 return SR_ERR;
392 }
393
394 return SR_OK;
395}
396
397SR_PRIV int dso_set_trigger_samplerate(const struct sr_dev_inst *sdi)
398{
399 struct dev_context *devc;
400 struct sr_usb_dev_inst *usb;
401 int ret, tmp;
402 uint8_t cmdstring[12];
403 uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
404 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
405 uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
406 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
407
408 devc = sdi->priv;
409 if (devc->profile->fw_pid == 0x2250)
410 return dso2250_set_trigger_samplerate(sdi);
411
412 sr_dbg("Preparing CMD_SET_TRIGGER_SAMPLERATE.");
413
414 usb = sdi->conn;
415
416 memset(cmdstring, 0, sizeof(cmdstring));
417 /* Command */
418 cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
419
420 /* Trigger source */
421 sr_dbg("Trigger source %s.", devc->triggersource);
422 if (!strcmp("CH2", devc->triggersource))
423 tmp = 0;
424 else if (!strcmp("CH1", devc->triggersource))
425 tmp = 1;
426 else if (!strcmp("EXT", devc->triggersource))
427 tmp = 2;
428 else {
429 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
430 return SR_ERR_ARG;
431 }
432 cmdstring[2] = tmp;
433
434 /* Frame size */
435 sr_dbg("Frame size: %d.", devc->framesize);
436 cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
437
438 /* Timebase fast */
439 sr_dbg("Time base index: %d.", devc->timebase);
440 if (devc->framesize == FRAMESIZE_SMALL) {
441 if (devc->timebase < TIME_20us)
442 tmp = 0;
443 else if (devc->timebase == TIME_20us)
444 tmp = 1;
445 else if (devc->timebase == TIME_40us)
446 tmp = 2;
447 else if (devc->timebase == TIME_100us)
448 tmp = 3;
449 else if (devc->timebase >= TIME_200us)
450 tmp = 4;
451 } else {
452 if (devc->timebase < TIME_40us) {
453 sr_err("Timebase < 40us only supported with 10K buffer.");
454 return SR_ERR_ARG;
455 }
456 else if (devc->timebase == TIME_40us)
457 tmp = 0;
458 else if (devc->timebase == TIME_100us)
459 tmp = 2;
460 else if (devc->timebase == TIME_200us)
461 tmp = 3;
462 else if (devc->timebase >= TIME_400us)
463 tmp = 4;
464 }
465 cmdstring[2] |= (tmp & 0x07) << 5;
466
467 /* Enabled channels: 00=CH1 01=CH2 10=both */
468 sr_dbg("Channels CH1=%d CH2=%d", devc->ch_enabled[0], devc->ch_enabled[1]);
469 tmp = (((devc->ch_enabled[1] ? 1 : 0) << 1) + (devc->ch_enabled[0] ? 1 : 0)) - 1;
470 cmdstring[3] = tmp;
471
472 /* Fast rates channel */
473 /* TODO: Is this right? */
474 tmp = devc->timebase < TIME_10us ? 1 : 0;
475 cmdstring[3] |= tmp << 2;
476
477 /* Trigger slope: 0=positive 1=negative */
478 /* TODO: Does this work? */
479 sr_dbg("Trigger slope: %d.", devc->triggerslope);
480 cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
481
482 /* Timebase slow */
483 if (devc->timebase < TIME_100us)
484 tmp = 0;
485 else if (devc->timebase > TIME_400ms)
486 tmp = 0xffed;
487 else {
488 if (devc->framesize == FRAMESIZE_SMALL)
489 tmp = timebase_small[devc->timebase - 3];
490 else
491 tmp = timebase_large[devc->timebase - 3];
492 }
493 cmdstring[4] = tmp & 0xff;
494 cmdstring[5] = (tmp >> 8) & 0xff;
495
496 /* Horizontal trigger position */
497 sr_dbg("Capture ratio: %" PRIu64 ".", devc->capture_ratio);
498 tmp = 0x77fff + 0x8000 * devc->capture_ratio / 100;
499 cmdstring[6] = tmp & 0xff;
500 cmdstring[7] = (tmp >> 8) & 0xff;
501 cmdstring[10] = (tmp >> 16) & 0xff;
502
503 if (send_begin(sdi) != SR_OK)
504 return SR_ERR;
505
506 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
507 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
508 sr_err("Failed to set trigger/samplerate: %s.",
509 libusb_error_name(ret));
510 return SR_ERR;
511 }
512 sr_dbg("Sent CMD_SET_TRIGGER_SAMPLERATE.");
513
514 return SR_OK;
515}
516
517static int dso_set_filters(const struct sr_dev_inst *sdi)
518{
519 struct dev_context *devc;
520 struct sr_usb_dev_inst *usb;
521 int ret, tmp;
522 uint8_t cmdstring[8];
523
524 sr_dbg("Preparing CMD_SET_FILTERS.");
525
526 devc = sdi->priv;
527 usb = sdi->conn;
528
529 memset(cmdstring, 0, sizeof(cmdstring));
530 cmdstring[0] = CMD_SET_FILTERS;
531 cmdstring[1] = 0x0f;
532 if (devc->filter[0]) {
533 sr_dbg("Turning on CH1 filter.");
534 cmdstring[2] |= 0x80;
535 }
536 if (devc->filter[1]) {
537 sr_dbg("Turning on CH2 filter.");
538 cmdstring[2] |= 0x40;
539 }
540 /*
541 * Not supported: filtering on the trigger
542 * cmdstring[2] |= 0x20;
543 */
544
545 if (send_begin(sdi) != SR_OK)
546 return SR_ERR;
547
548 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
549 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
550 sr_err("Failed to set filters: %s.", libusb_error_name(ret));
551 return SR_ERR;
552 }
553 sr_dbg("Sent CMD_SET_FILTERS.");
554
555 return SR_OK;
556}
557
558static int dso_set_voltage(const struct sr_dev_inst *sdi)
559{
560 struct dev_context *devc;
561 struct sr_usb_dev_inst *usb;
562 int ret, tmp;
563 uint8_t cmdstring[8];
564
565 sr_dbg("Preparing CMD_SET_VOLTAGE.");
566
567 devc = sdi->priv;
568 usb = sdi->conn;
569
570 memset(cmdstring, 0, sizeof(cmdstring));
571 cmdstring[0] = CMD_SET_VOLTAGE;
572
573 if (devc->profile->fw_pid == 0x2250) {
574 cmdstring[1] = 0x00;
575 cmdstring[2] = 0x08;
576 } else {
577 cmdstring[1] = 0x0f;
578 cmdstring[2] = 0x30;
579 }
580
581 /* CH1 volts/div is encoded in bits 0-1. */
582 sr_dbg("CH1 vdiv index: %d.", devc->voltage[0]);
583 switch (devc->voltage[0]) {
584 case VDIV_1V:
585 case VDIV_100MV:
586 case VDIV_10MV:
587 cmdstring[2] |= 0x00;
588 break;
589 case VDIV_2V:
590 case VDIV_200MV:
591 case VDIV_20MV:
592 cmdstring[2] |= 0x01;
593 break;
594 case VDIV_5V:
595 case VDIV_500MV:
596 case VDIV_50MV:
597 cmdstring[2] |= 0x02;
598 break;
599 }
600
601 /* CH2 volts/div is encoded in bits 2-3. */
602 sr_dbg("CH2 vdiv index: %d.", devc->voltage[1]);
603 switch (devc->voltage[1]) {
604 case VDIV_1V:
605 case VDIV_100MV:
606 case VDIV_10MV:
607 cmdstring[2] |= 0x00;
608 break;
609 case VDIV_2V:
610 case VDIV_200MV:
611 case VDIV_20MV:
612 cmdstring[2] |= 0x04;
613 break;
614 case VDIV_5V:
615 case VDIV_500MV:
616 case VDIV_50MV:
617 cmdstring[2] |= 0x08;
618 break;
619 }
620
621 if (send_begin(sdi) != SR_OK)
622 return SR_ERR;
623
624 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
625 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
626 sr_err("Failed to set voltage: %s.", libusb_error_name(ret));
627 return SR_ERR;
628 }
629 sr_dbg("Sent CMD_SET_VOLTAGE.");
630
631 return SR_OK;
632}
633
634static int dso_set_relays(const struct sr_dev_inst *sdi)
635{
636 struct dev_context *devc;
637 struct sr_usb_dev_inst *usb;
638 GString *gs;
639 int ret, i;
640 uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
641 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
642
643 sr_dbg("Preparing CTRL_SETRELAYS.");
644
645 devc = sdi->priv;
646 usb = sdi->conn;
647
648 if (devc->voltage[0] < VDIV_1V)
649 relays[1] = ~relays[1];
650
651 if (devc->voltage[0] < VDIV_100MV)
652 relays[2] = ~relays[2];
653
654 sr_dbg("CH1 coupling: %d.", devc->coupling[0]);
655 if (devc->coupling[0] != COUPLING_AC)
656 relays[3] = ~relays[3];
657
658 if (devc->voltage[1] < VDIV_1V)
659 relays[4] = ~relays[4];
660
661 if (devc->voltage[1] < VDIV_100MV)
662 relays[5] = ~relays[5];
663
664 sr_dbg("CH2 coupling: %d.", devc->coupling[1]);
665 if (devc->coupling[1] != COUPLING_AC)
666 relays[6] = ~relays[6];
667
668 if (!strcmp(devc->triggersource, "EXT"))
669 relays[7] = ~relays[7];
670
671 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
672 gs = g_string_sized_new(128);
673 g_string_printf(gs, "Relays:");
674 for (i = 0; i < 17; i++)
675 g_string_append_printf(gs, " %.2x", relays[i]);
676 sr_dbg("%s", gs->str);
677 g_string_free(gs, TRUE);
678 }
679
680 if ((ret = libusb_control_transfer(usb->devhdl,
681 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
682 0, 0, relays, 17, 100)) != sizeof(relays)) {
683 sr_err("Failed to set relays: %s.", libusb_error_name(ret));
684 return SR_ERR;
685 }
686 sr_dbg("Sent CTRL_SETRELAYS.");
687
688 return SR_OK;
689}
690
691SR_PRIV int dso_set_voffsets(const struct sr_dev_inst *sdi)
692{
693 struct dev_context *devc;
694 struct sr_usb_dev_inst *usb;
695 int offset, ret;
696 uint16_t *ch_levels;
697 uint8_t offsets[17];
698
699 sr_dbg("Preparing CTRL_SETOFFSET.");
700
701 devc = sdi->priv;
702 usb = sdi->conn;
703
704 memset(offsets, 0, sizeof(offsets));
705 /* Channel 1 */
706 ch_levels = devc->channel_levels[0][devc->voltage[0]];
707 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
708 offsets[0] = (offset >> 8) | 0x20;
709 offsets[1] = offset & 0xff;
710 sr_dbg("CH1 offset: %3.2f (%.2x%.2x).", devc->voffset_ch1,
711 offsets[0], offsets[1]);
712
713 /* Channel 2 */
714 ch_levels = devc->channel_levels[1][devc->voltage[1]];
715 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
716 offsets[2] = (offset >> 8) | 0x20;
717 offsets[3] = offset & 0xff;
718 sr_dbg("CH2 offset: %3.2f (%.2x%.2x).", devc->voffset_ch2,
719 offsets[2], offsets[3]);
720
721 /* Trigger */
722 offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
723 offsets[4] = (offset >> 8) | 0x20;
724 offsets[5] = offset & 0xff;
725 sr_dbg("Trigger offset: %3.2f (%.2x%.2x).", devc->voffset_trigger,
726 offsets[4], offsets[5]);
727
728 if ((ret = libusb_control_transfer(usb->devhdl,
729 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
730 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
731 sr_err("Failed to set offsets: %s.", libusb_error_name(ret));
732 return SR_ERR;
733 }
734 sr_dbg("Sent CTRL_SETOFFSET.");
735
736 return SR_OK;
737}
738
739SR_PRIV int dso_enable_trigger(const struct sr_dev_inst *sdi)
740{
741 struct sr_usb_dev_inst *usb;
742 int ret, tmp;
743 uint8_t cmdstring[2];
744
745 sr_dbg("Sending CMD_ENABLE_TRIGGER.");
746
747 usb = sdi->conn;
748
749 memset(cmdstring, 0, sizeof(cmdstring));
750 cmdstring[0] = CMD_ENABLE_TRIGGER;
751 cmdstring[1] = 0x00;
752
753 if (send_begin(sdi) != SR_OK)
754 return SR_ERR;
755
756 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
757 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
758 sr_err("Failed to enable trigger: %s.", libusb_error_name(ret));
759 return SR_ERR;
760 }
761
762 return SR_OK;
763}
764
765SR_PRIV int dso_force_trigger(const struct sr_dev_inst *sdi)
766{
767 struct sr_usb_dev_inst *usb;
768 int ret, tmp;
769 uint8_t cmdstring[2];
770
771 sr_dbg("Sending CMD_FORCE_TRIGGER.");
772
773 usb = sdi->conn;
774
775 memset(cmdstring, 0, sizeof(cmdstring));
776 cmdstring[0] = CMD_FORCE_TRIGGER;
777 cmdstring[1] = 0x00;
778
779 if (send_begin(sdi) != SR_OK)
780 return SR_ERR;
781
782 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
783 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
784 sr_err("Failed to force trigger: %s.", libusb_error_name(ret));
785 return SR_ERR;
786 }
787
788 return SR_OK;
789}
790
791SR_PRIV int dso_init(const struct sr_dev_inst *sdi)
792{
793 sr_dbg("Initializing DSO.");
794
795 if (get_channel_offsets(sdi) != SR_OK)
796 return SR_ERR;
797
798 if (dso_set_trigger_samplerate(sdi) != SR_OK)
799 return SR_ERR;
800
801 if (dso_set_filters(sdi) != SR_OK)
802 return SR_ERR;
803
804 if (dso_set_voltage(sdi) != SR_OK)
805 return SR_ERR;
806
807 if (dso_set_relays(sdi) != SR_OK)
808 return SR_ERR;
809
810 if (dso_set_voffsets(sdi) != SR_OK)
811 return SR_ERR;
812
813 if (dso_enable_trigger(sdi) != SR_OK)
814 return SR_ERR;
815
816 return SR_OK;
817}
818
819SR_PRIV int dso_get_capturestate(const struct sr_dev_inst *sdi,
820 uint8_t *capturestate, uint32_t *trigger_offset)
821{
822 struct sr_usb_dev_inst *usb;
823 int ret, tmp, i;
824 unsigned int bitvalue, toff;
825 uint8_t cmdstring[2], inbuf[512];
826
827 sr_dbg("Sending CMD_GET_CAPTURESTATE.");
828
829 usb = sdi->conn;
830
831 cmdstring[0] = CMD_GET_CAPTURESTATE;
832 cmdstring[1] = 0;
833
834 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
835 sr_dbg("Failed to send get_capturestate command: %s.",
836 libusb_error_name(ret));
837 return SR_ERR;
838 }
839
840 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_IN,
841 inbuf, 512, &tmp, 100)) != 0) {
842 sr_dbg("Failed to get capturestate: %s.",
843 libusb_error_name(ret));
844 return SR_ERR;
845 }
846 *capturestate = inbuf[0];
847 toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
848
849 /*
850 * This conversion comes from the openhantek project.
851 * Each set bit in the 24-bit value inverts all bits with a lower
852 * value. No idea why the device reports the trigger point this way.
853 */
854 bitvalue = 1;
855 for (i = 0; i < 24; i++) {
856 /* Each set bit inverts all bits with a lower value. */
857 if (toff & bitvalue)
858 toff ^= bitvalue - 1;
859 bitvalue <<= 1;
860 }
861 *trigger_offset = toff;
862
863 return SR_OK;
864}
865
866SR_PRIV int dso_capture_start(const struct sr_dev_inst *sdi)
867{
868 int ret;
869 uint8_t cmdstring[2];
870
871 sr_dbg("Sending CMD_CAPTURE_START.");
872
873 cmdstring[0] = CMD_CAPTURE_START;
874 cmdstring[1] = 0;
875
876 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
877 sr_err("Failed to send capture_start command: %s.",
878 libusb_error_name(ret));
879 return SR_ERR;
880 }
881
882 return SR_OK;
883}
884
885SR_PRIV int dso_get_channeldata(const struct sr_dev_inst *sdi,
886 libusb_transfer_cb_fn cb)
887{
888 struct dev_context *devc;
889 struct sr_usb_dev_inst *usb;
890 struct libusb_transfer *transfer;
891 int num_transfers, ret, i;
892 uint8_t cmdstring[2];
893 unsigned char *buf;
894
895 sr_dbg("Sending CMD_GET_CHANNELDATA.");
896
897 devc = sdi->priv;
898 usb = sdi->conn;
899
900 cmdstring[0] = CMD_GET_CHANNELDATA;
901 cmdstring[1] = 0;
902
903 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
904 sr_err("Failed to get channel data: %s.",
905 libusb_error_name(ret));
906 return SR_ERR;
907 }
908
909 /* TODO: DSO-2xxx only. */
910 num_transfers = devc->framesize *
911 sizeof(unsigned short) / devc->epin_maxpacketsize;
912 sr_dbg("Queueing up %d transfers.", num_transfers);
913 for (i = 0; i < num_transfers; i++) {
914 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
915 sr_err("Failed to malloc USB endpoint buffer.");
916 return SR_ERR_MALLOC;
917 }
918 transfer = libusb_alloc_transfer(0);
919 libusb_fill_bulk_transfer(transfer, usb->devhdl, DSO_EP_IN, buf,
920 devc->epin_maxpacketsize, cb, (void *)sdi, 40);
921 if ((ret = libusb_submit_transfer(transfer)) != 0) {
922 sr_err("Failed to submit transfer: %s.",
923 libusb_error_name(ret));
924 /* TODO: Free them all. */
925 libusb_free_transfer(transfer);
926 g_free(buf);
927 return SR_ERR;
928 }
929 }
930
931 return SR_OK;
932}
Hardware access and backend lib