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ols: more robust device reset in acquisition stop
[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 if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
134 continue;
135
136 if (strcmp(sdi->connection_id, connection_id))
137 /* This is not the one. */
138 continue;
139 }
140
141 if (!(err = libusb_open(devlist[i], &usb->devhdl))) {
142 if (usb->address == 0xff)
143 /*
144 * first time we touch this device after firmware upload,
145 * so we don't know the address yet.
146 */
147 usb->address = libusb_get_device_address(devlist[i]);
148
149 if (!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
150 sr_err("Wrong endpoint profile.");
151 else {
152 sdi->status = SR_ST_ACTIVE;
153 sr_info("Opened device on %d.%d (logical) / "
154 "%s (physical) interface %d.",
155 usb->bus, usb->address,
156 sdi->connection_id, USB_INTERFACE);
157 }
158 } else {
159 sr_err("Failed to open device: %s.",
160 libusb_error_name(err));
161 }
162
163 /* If we made it here, we handled the device (somehow). */
164 break;
165 }
166 libusb_free_device_list(devlist, 1);
167
168 if (sdi->status != SR_ST_ACTIVE)
169 return SR_ERR;
170
171 return SR_OK;
172}
173
174SR_PRIV void dso_close(struct sr_dev_inst *sdi)
175{
176 struct sr_usb_dev_inst *usb;
177
178 usb = sdi->conn;
179
180 if (!usb->devhdl)
181 return;
182
183 sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
184 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
185 libusb_release_interface(usb->devhdl, USB_INTERFACE);
186 libusb_close(usb->devhdl);
187 usb->devhdl = NULL;
188 sdi->status = SR_ST_INACTIVE;
189}
190
191static int get_channel_offsets(const struct sr_dev_inst *sdi)
192{
193 struct dev_context *devc;
194 struct sr_usb_dev_inst *usb;
195 GString *gs;
196 int chan, v, ret;
197
198 sr_dbg("Getting channel offsets.");
199
200 devc = sdi->priv;
201 usb = sdi->conn;
202
203 ret = libusb_control_transfer(usb->devhdl,
204 LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
205 CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
206 (unsigned char *)&devc->channel_levels,
207 sizeof(devc->channel_levels), 200);
208 if (ret != sizeof(devc->channel_levels)) {
209 sr_err("Failed to get channel offsets: %s.",
210 libusb_error_name(ret));
211 return SR_ERR;
212 }
213
214 /* Comes in as 16-bit numbers with the second byte always 0 on
215 * the DSO-2090. Guessing this is supposed to be big-endian,
216 * since that's how voltage offsets are submitted back to the DSO.
217 * Convert to host order now, so we can use them natively.
218 */
219 for (chan = 0; chan < NUM_CHANNELS; chan++) {
220 for (v = 0; v < 9; v++) {
221 devc->channel_levels[chan][v][0] =
222 g_ntohs(devc->channel_levels[chan][v][0]);
223 devc->channel_levels[chan][v][1] =
224 g_ntohs(devc->channel_levels[chan][v][1]);
225 }
226 }
227
228 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
229 gs = g_string_sized_new(128);
230 for (chan = 0; chan < NUM_CHANNELS; chan++) {
231 g_string_printf(gs, "CH%d:", chan + 1);
232 for (v = 0; v < 9; v++) {
233 g_string_append_printf(gs, " %.4x-%.4x",
234 devc->channel_levels[chan][v][0],
235 devc->channel_levels[chan][v][1]);
236 }
237 sr_dbg("%s", gs->str);
238 }
239 g_string_free(gs, TRUE);
240 }
241
242 return SR_OK;
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/* See http://openhantek.sourceforge.net/doc/namespaceHantek.html#ac1cd181814cf3da74771c29800b39028 */
263static int dso2250_set_trigger_samplerate(const struct sr_dev_inst *sdi)
264{
265 struct dev_context *devc;
266 struct sr_usb_dev_inst *usb;
267 int ret, tmp;
268 uint64_t base;
269 uint8_t cmdstring[12];
270 int trig;
271
272 devc = sdi->priv;
273 usb = sdi->conn;
274
275 memset(cmdstring, 0, sizeof(cmdstring));
276 /* Command */
277 cmdstring[0] = CMD_2250_SET_TRIGGERSOURCE;
278 sr_dbg("Trigger source %s.", devc->triggersource);
279 if (!strcmp("CH2", devc->triggersource))
280 tmp = 3;
281 else if (!strcmp("CH1", devc->triggersource))
282 tmp = 2;
283 else if (!strcmp("EXT", devc->triggersource))
284 tmp = 0;
285 else {
286 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
287 return SR_ERR_ARG;
288 }
289 cmdstring[2] = tmp;
290
291 sr_dbg("Trigger slope: %d.", devc->triggerslope);
292 cmdstring[2] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
293
294 if (send_begin(sdi) != SR_OK)
295 return SR_ERR;
296
297 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
298 cmdstring, 8, &tmp, 100)) != 0) {
299 sr_err("Failed to set trigger/samplerate: %s.",
300 libusb_error_name(ret));
301 return SR_ERR;
302 }
303
304 /* Frame size */
305 sr_dbg("Frame size: %d.", devc->framesize);
306 cmdstring[0] = CMD_2250_SET_RECORD_LENGTH;
307 cmdstring[2] = (devc->framesize == FRAMESIZE_SMALL) ? 0x01 : 0x02;
308
309 if (send_begin(sdi) != SR_OK)
310 return SR_ERR;
311
312 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
313 cmdstring, 4, &tmp, 100)) != 0) {
314 sr_err("Failed to set record length: %s.",
315 libusb_error_name(ret));
316 return SR_ERR;
317 }
318
319 memset(cmdstring, 0, sizeof(cmdstring));
320 cmdstring[0] = CMD_2250_SET_SAMPLERATE;
321 base = 100e6;
322 if (devc->samplerate > base) {
323 /* Timebase fast */
324 sr_err("Sample rate > 100MHz not yet supported.");
325 return SR_ERR_ARG;
326 }
327
328 tmp = base / devc->samplerate;
329 if (tmp) {
330 /* Downsampling on */
331 cmdstring[2] |= 2;
332 /* Downsampler = 1comp((Base / Samplerate) - 2)
333 * Base == 100Msa resp. 200MSa
334 *
335 * Example for 500kSa/s:
336 * 100e6 / 500e3 => 200
337 * 200 - 2 => 198
338 * 1comp(198) => ff39 */
339 tmp -= 2;
340 tmp = ~tmp;
341 sr_dbg("Down sampler value: 0x%x.", tmp & 0xffff);
342 cmdstring[4] = (tmp >> 0) & 0xff;
343 cmdstring[5] = (tmp >> 8) & 0xff;
344 }
345
346 if (send_begin(sdi) != SR_OK)
347 return SR_ERR;
348
349 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
350 cmdstring, 8, &tmp, 100)) != 0) {
351 sr_err("Failed to set sample rate: %s.",
352 libusb_error_name(ret));
353 return SR_ERR;
354 }
355 sr_dbg("Sent CMD_2250_SET_SAMPLERATE.");
356
357 /* Enabled channels: 00=CH1, 01=CH2, 10=both. */
358 memset(cmdstring, 0, sizeof(cmdstring));
359 cmdstring[0] = CMD_2250_SET_CHANNELS;
360 sr_dbg("Channels: CH1=%d, CH2=%d.", devc->ch_enabled[0], devc->ch_enabled[1]);
361 cmdstring[2] = (devc->ch_enabled[0] ? 0 : 1) + (devc->ch_enabled[1] ? 2 : 0);
362
363 if (send_begin(sdi) != SR_OK)
364 return SR_ERR;
365
366 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
367 cmdstring, 4, &tmp, 100)) != 0) {
368 sr_err("Failed to set channels: %s.",
369 libusb_error_name(ret));
370 return SR_ERR;
371 }
372 sr_dbg("Sent CMD_2250_SET_CHANNELS.");
373
374 /* Trigger slope: 0=positive, 1=negative. */
375 memset(cmdstring, 0, sizeof(cmdstring));
376 cmdstring[0] = CMD_2250_SET_TRIGGERPOS_AND_BUFFER;
377
378 sr_dbg("Capture ratio: %" PRIu64 ".", devc->capture_ratio);
379 trig = devc->capture_ratio;
380 dso2250_set_triggerpos(trig,
381 devc->framesize != FRAMESIZE_SMALL, cmdstring, 2);
382 dso2250_set_triggerpos(100 - trig,
383 devc->framesize != FRAMESIZE_SMALL, cmdstring, 6);
384
385 if (send_begin(sdi) != SR_OK)
386 return SR_ERR;
387
388 /* TODO: 12 bytes according to documentation? */
389 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
390 cmdstring, 10, &tmp, 100)) != 0) {
391 sr_err("Failed to set trigger position: %s.",
392 libusb_error_name(ret));
393 return SR_ERR;
394 }
395
396 return SR_OK;
397}
398
399SR_PRIV int dso_set_trigger_samplerate(const struct sr_dev_inst *sdi)
400{
401 struct dev_context *devc;
402 struct sr_usb_dev_inst *usb;
403 int ret, tmp;
404 uint8_t cmdstring[12];
405 uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
406 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
407 uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
408 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
409
410 devc = sdi->priv;
411 if (devc->profile->fw_pid == 0x2250)
412 return dso2250_set_trigger_samplerate(sdi);
413
414 sr_dbg("Preparing CMD_SET_TRIGGER_SAMPLERATE.");
415
416 usb = sdi->conn;
417
418 memset(cmdstring, 0, sizeof(cmdstring));
419 /* Command */
420 cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
421
422 /* Trigger source */
423 sr_dbg("Trigger source %s.", devc->triggersource);
424 if (!strcmp("CH2", devc->triggersource))
425 tmp = 0;
426 else if (!strcmp("CH1", devc->triggersource))
427 tmp = 1;
428 else if (!strcmp("EXT", devc->triggersource))
429 tmp = 2;
430 else {
431 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
432 return SR_ERR_ARG;
433 }
434 cmdstring[2] = tmp;
435
436 /* Frame size */
437 sr_dbg("Frame size: %d.", devc->framesize);
438 cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
439
440 /* Timebase fast */
441 sr_dbg("Time base index: %d.", devc->timebase);
442 if (devc->framesize == FRAMESIZE_SMALL) {
443 if (devc->timebase < TIME_20us)
444 tmp = 0;
445 else if (devc->timebase == TIME_20us)
446 tmp = 1;
447 else if (devc->timebase == TIME_40us)
448 tmp = 2;
449 else if (devc->timebase == TIME_100us)
450 tmp = 3;
451 else if (devc->timebase >= TIME_200us)
452 tmp = 4;
453 } else {
454 if (devc->timebase < TIME_40us) {
455 sr_err("Timebase < 40us only supported with 10K buffer.");
456 return SR_ERR_ARG;
457 }
458 else if (devc->timebase == TIME_40us)
459 tmp = 0;
460 else if (devc->timebase == TIME_100us)
461 tmp = 2;
462 else if (devc->timebase == TIME_200us)
463 tmp = 3;
464 else if (devc->timebase >= TIME_400us)
465 tmp = 4;
466 }
467 cmdstring[2] |= (tmp & 0x07) << 5;
468
469 /* Enabled channels: 00=CH1 01=CH2 10=both */
470 sr_dbg("Channels CH1=%d CH2=%d", devc->ch_enabled[0], devc->ch_enabled[1]);
471 tmp = (((devc->ch_enabled[1] ? 1 : 0) << 1) + (devc->ch_enabled[0] ? 1 : 0)) - 1;
472 cmdstring[3] = tmp;
473
474 /* Fast rates channel */
475 /* TODO: Is this right? */
476 tmp = devc->timebase < TIME_10us ? 1 : 0;
477 cmdstring[3] |= tmp << 2;
478
479 /* Trigger slope: 0=positive 1=negative */
480 /* TODO: Does this work? */
481 sr_dbg("Trigger slope: %d.", devc->triggerslope);
482 cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
483
484 /* Timebase slow */
485 if (devc->timebase < TIME_100us)
486 tmp = 0;
487 else if (devc->timebase > TIME_400ms)
488 tmp = 0xffed;
489 else {
490 if (devc->framesize == FRAMESIZE_SMALL)
491 tmp = timebase_small[devc->timebase - 3];
492 else
493 tmp = timebase_large[devc->timebase - 3];
494 }
495 cmdstring[4] = tmp & 0xff;
496 cmdstring[5] = (tmp >> 8) & 0xff;
497
498 /* Horizontal trigger position */
499 sr_dbg("Capture ratio: %" PRIu64 ".", devc->capture_ratio);
500 tmp = 0x77fff + 0x8000 * devc->capture_ratio / 100;
501 cmdstring[6] = tmp & 0xff;
502 cmdstring[7] = (tmp >> 8) & 0xff;
503 cmdstring[10] = (tmp >> 16) & 0xff;
504
505 if (send_begin(sdi) != SR_OK)
506 return SR_ERR;
507
508 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
509 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
510 sr_err("Failed to set trigger/samplerate: %s.",
511 libusb_error_name(ret));
512 return SR_ERR;
513 }
514 sr_dbg("Sent CMD_SET_TRIGGER_SAMPLERATE.");
515
516 return SR_OK;
517}
518
519static int dso_set_filters(const struct sr_dev_inst *sdi)
520{
521 struct dev_context *devc;
522 struct sr_usb_dev_inst *usb;
523 int ret, tmp;
524 uint8_t cmdstring[8];
525
526 sr_dbg("Preparing CMD_SET_FILTERS.");
527
528 devc = sdi->priv;
529 usb = sdi->conn;
530
531 memset(cmdstring, 0, sizeof(cmdstring));
532 cmdstring[0] = CMD_SET_FILTERS;
533 cmdstring[1] = 0x0f;
534 if (devc->filter[0]) {
535 sr_dbg("Turning on CH1 filter.");
536 cmdstring[2] |= 0x80;
537 }
538 if (devc->filter[1]) {
539 sr_dbg("Turning on CH2 filter.");
540 cmdstring[2] |= 0x40;
541 }
542 /*
543 * Not supported: filtering on the trigger
544 * cmdstring[2] |= 0x20;
545 */
546
547 if (send_begin(sdi) != SR_OK)
548 return SR_ERR;
549
550 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
551 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
552 sr_err("Failed to set filters: %s.", libusb_error_name(ret));
553 return SR_ERR;
554 }
555 sr_dbg("Sent CMD_SET_FILTERS.");
556
557 return SR_OK;
558}
559
560static int dso_set_voltage(const struct sr_dev_inst *sdi)
561{
562 struct dev_context *devc;
563 struct sr_usb_dev_inst *usb;
564 int ret, tmp;
565 uint8_t cmdstring[8];
566
567 sr_dbg("Preparing CMD_SET_VOLTAGE.");
568
569 devc = sdi->priv;
570 usb = sdi->conn;
571
572 memset(cmdstring, 0, sizeof(cmdstring));
573 cmdstring[0] = CMD_SET_VOLTAGE;
574
575 if (devc->profile->fw_pid == 0x2250) {
576 cmdstring[1] = 0x00;
577 cmdstring[2] = 0x08;
578 } else {
579 cmdstring[1] = 0x0f;
580 cmdstring[2] = 0x30;
581 }
582
583 /* CH1 volts/div is encoded in bits 0-1. */
584 sr_dbg("CH1 vdiv index: %d.", devc->voltage[0]);
585 switch (devc->voltage[0]) {
586 case VDIV_1V:
587 case VDIV_100MV:
588 case VDIV_10MV:
589 cmdstring[2] |= 0x00;
590 break;
591 case VDIV_2V:
592 case VDIV_200MV:
593 case VDIV_20MV:
594 cmdstring[2] |= 0x01;
595 break;
596 case VDIV_5V:
597 case VDIV_500MV:
598 case VDIV_50MV:
599 cmdstring[2] |= 0x02;
600 break;
601 }
602
603 /* CH2 volts/div is encoded in bits 2-3. */
604 sr_dbg("CH2 vdiv index: %d.", devc->voltage[1]);
605 switch (devc->voltage[1]) {
606 case VDIV_1V:
607 case VDIV_100MV:
608 case VDIV_10MV:
609 cmdstring[2] |= 0x00;
610 break;
611 case VDIV_2V:
612 case VDIV_200MV:
613 case VDIV_20MV:
614 cmdstring[2] |= 0x04;
615 break;
616 case VDIV_5V:
617 case VDIV_500MV:
618 case VDIV_50MV:
619 cmdstring[2] |= 0x08;
620 break;
621 }
622
623 if (send_begin(sdi) != SR_OK)
624 return SR_ERR;
625
626 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
627 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
628 sr_err("Failed to set voltage: %s.", libusb_error_name(ret));
629 return SR_ERR;
630 }
631 sr_dbg("Sent CMD_SET_VOLTAGE.");
632
633 return SR_OK;
634}
635
636static int dso_set_relays(const struct sr_dev_inst *sdi)
637{
638 struct dev_context *devc;
639 struct sr_usb_dev_inst *usb;
640 GString *gs;
641 int ret, i;
642 uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
643 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
644
645 sr_dbg("Preparing CTRL_SETRELAYS.");
646
647 devc = sdi->priv;
648 usb = sdi->conn;
649
650 if (devc->voltage[0] < VDIV_1V)
651 relays[1] = ~relays[1];
652
653 if (devc->voltage[0] < VDIV_100MV)
654 relays[2] = ~relays[2];
655
656 sr_dbg("CH1 coupling: %d.", devc->coupling[0]);
657 if (devc->coupling[0] != COUPLING_AC)
658 relays[3] = ~relays[3];
659
660 if (devc->voltage[1] < VDIV_1V)
661 relays[4] = ~relays[4];
662
663 if (devc->voltage[1] < VDIV_100MV)
664 relays[5] = ~relays[5];
665
666 sr_dbg("CH2 coupling: %d.", devc->coupling[1]);
667 if (devc->coupling[1] != COUPLING_AC)
668 relays[6] = ~relays[6];
669
670 if (!strcmp(devc->triggersource, "EXT"))
671 relays[7] = ~relays[7];
672
673 if (sr_log_loglevel_get() >= SR_LOG_DBG) {
674 gs = g_string_sized_new(128);
675 g_string_printf(gs, "Relays:");
676 for (i = 0; i < 17; i++)
677 g_string_append_printf(gs, " %.2x", relays[i]);
678 sr_dbg("%s", gs->str);
679 g_string_free(gs, TRUE);
680 }
681
682 if ((ret = libusb_control_transfer(usb->devhdl,
683 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
684 0, 0, relays, 17, 100)) != sizeof(relays)) {
685 sr_err("Failed to set relays: %s.", libusb_error_name(ret));
686 return SR_ERR;
687 }
688 sr_dbg("Sent CTRL_SETRELAYS.");
689
690 return SR_OK;
691}
692
693SR_PRIV int dso_set_voffsets(const struct sr_dev_inst *sdi)
694{
695 struct dev_context *devc;
696 struct sr_usb_dev_inst *usb;
697 int offset, ret;
698 uint16_t *ch_levels;
699 uint8_t offsets[17];
700
701 sr_dbg("Preparing CTRL_SETOFFSET.");
702
703 devc = sdi->priv;
704 usb = sdi->conn;
705
706 memset(offsets, 0, sizeof(offsets));
707 /* Channel 1 */
708 ch_levels = devc->channel_levels[0][devc->voltage[0]];
709 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
710 offsets[0] = (offset >> 8) | 0x20;
711 offsets[1] = offset & 0xff;
712 sr_dbg("CH1 offset: %3.2f (%.2x%.2x).", devc->voffset_ch1,
713 offsets[0], offsets[1]);
714
715 /* Channel 2 */
716 ch_levels = devc->channel_levels[1][devc->voltage[1]];
717 offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
718 offsets[2] = (offset >> 8) | 0x20;
719 offsets[3] = offset & 0xff;
720 sr_dbg("CH2 offset: %3.2f (%.2x%.2x).", devc->voffset_ch2,
721 offsets[2], offsets[3]);
722
723 /* Trigger */
724 offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
725 offsets[4] = (offset >> 8) | 0x20;
726 offsets[5] = offset & 0xff;
727 sr_dbg("Trigger offset: %3.2f (%.2x%.2x).", devc->voffset_trigger,
728 offsets[4], offsets[5]);
729
730 if ((ret = libusb_control_transfer(usb->devhdl,
731 LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
732 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
733 sr_err("Failed to set offsets: %s.", libusb_error_name(ret));
734 return SR_ERR;
735 }
736 sr_dbg("Sent CTRL_SETOFFSET.");
737
738 return SR_OK;
739}
740
741SR_PRIV int dso_enable_trigger(const struct sr_dev_inst *sdi)
742{
743 struct sr_usb_dev_inst *usb;
744 int ret, tmp;
745 uint8_t cmdstring[2];
746
747 sr_dbg("Sending CMD_ENABLE_TRIGGER.");
748
749 usb = sdi->conn;
750
751 memset(cmdstring, 0, sizeof(cmdstring));
752 cmdstring[0] = CMD_ENABLE_TRIGGER;
753 cmdstring[1] = 0x00;
754
755 if (send_begin(sdi) != SR_OK)
756 return SR_ERR;
757
758 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
759 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
760 sr_err("Failed to enable trigger: %s.", libusb_error_name(ret));
761 return SR_ERR;
762 }
763
764 return SR_OK;
765}
766
767SR_PRIV int dso_force_trigger(const struct sr_dev_inst *sdi)
768{
769 struct sr_usb_dev_inst *usb;
770 int ret, tmp;
771 uint8_t cmdstring[2];
772
773 sr_dbg("Sending CMD_FORCE_TRIGGER.");
774
775 usb = sdi->conn;
776
777 memset(cmdstring, 0, sizeof(cmdstring));
778 cmdstring[0] = CMD_FORCE_TRIGGER;
779 cmdstring[1] = 0x00;
780
781 if (send_begin(sdi) != SR_OK)
782 return SR_ERR;
783
784 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
785 cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
786 sr_err("Failed to force trigger: %s.", libusb_error_name(ret));
787 return SR_ERR;
788 }
789
790 return SR_OK;
791}
792
793SR_PRIV int dso_init(const struct sr_dev_inst *sdi)
794{
795 sr_dbg("Initializing DSO.");
796
797 if (get_channel_offsets(sdi) != SR_OK)
798 return SR_ERR;
799
800 if (dso_set_trigger_samplerate(sdi) != SR_OK)
801 return SR_ERR;
802
803 if (dso_set_filters(sdi) != SR_OK)
804 return SR_ERR;
805
806 if (dso_set_voltage(sdi) != SR_OK)
807 return SR_ERR;
808
809 if (dso_set_relays(sdi) != SR_OK)
810 return SR_ERR;
811
812 if (dso_set_voffsets(sdi) != SR_OK)
813 return SR_ERR;
814
815 if (dso_enable_trigger(sdi) != SR_OK)
816 return SR_ERR;
817
818 return SR_OK;
819}
820
821SR_PRIV int dso_get_capturestate(const struct sr_dev_inst *sdi,
822 uint8_t *capturestate, uint32_t *trigger_offset)
823{
824 struct sr_usb_dev_inst *usb;
825 int ret, tmp, i;
826 unsigned int bitvalue, toff;
827 uint8_t cmdstring[2], inbuf[512];
828
829 sr_dbg("Sending CMD_GET_CAPTURESTATE.");
830
831 usb = sdi->conn;
832
833 cmdstring[0] = CMD_GET_CAPTURESTATE;
834 cmdstring[1] = 0;
835
836 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
837 sr_dbg("Failed to send get_capturestate command: %s.",
838 libusb_error_name(ret));
839 return SR_ERR;
840 }
841
842 if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_IN,
843 inbuf, 512, &tmp, 100)) != 0) {
844 sr_dbg("Failed to get capturestate: %s.",
845 libusb_error_name(ret));
846 return SR_ERR;
847 }
848 *capturestate = inbuf[0];
849 toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
850
851 /*
852 * This conversion comes from the openhantek project.
853 * Each set bit in the 24-bit value inverts all bits with a lower
854 * value. No idea why the device reports the trigger point this way.
855 */
856 bitvalue = 1;
857 for (i = 0; i < 24; i++) {
858 /* Each set bit inverts all bits with a lower value. */
859 if (toff & bitvalue)
860 toff ^= bitvalue - 1;
861 bitvalue <<= 1;
862 }
863 *trigger_offset = toff;
864
865 return SR_OK;
866}
867
868SR_PRIV int dso_capture_start(const struct sr_dev_inst *sdi)
869{
870 int ret;
871 uint8_t cmdstring[2];
872
873 sr_dbg("Sending CMD_CAPTURE_START.");
874
875 cmdstring[0] = CMD_CAPTURE_START;
876 cmdstring[1] = 0;
877
878 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
879 sr_err("Failed to send capture_start command: %s.",
880 libusb_error_name(ret));
881 return SR_ERR;
882 }
883
884 return SR_OK;
885}
886
887SR_PRIV int dso_get_channeldata(const struct sr_dev_inst *sdi,
888 libusb_transfer_cb_fn cb)
889{
890 struct dev_context *devc;
891 struct sr_usb_dev_inst *usb;
892 struct libusb_transfer *transfer;
893 int num_transfers, ret, i;
894 uint8_t cmdstring[2];
895 unsigned char *buf;
896
897 sr_dbg("Sending CMD_GET_CHANNELDATA.");
898
899 devc = sdi->priv;
900 usb = sdi->conn;
901
902 cmdstring[0] = CMD_GET_CHANNELDATA;
903 cmdstring[1] = 0;
904
905 if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
906 sr_err("Failed to get channel data: %s.",
907 libusb_error_name(ret));
908 return SR_ERR;
909 }
910
911 /* TODO: DSO-2xxx only. */
912 num_transfers = devc->framesize *
913 sizeof(unsigned short) / devc->epin_maxpacketsize;
914 sr_dbg("Queueing up %d transfers.", num_transfers);
915 for (i = 0; i < num_transfers; i++) {
916 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
917 sr_err("Failed to malloc USB endpoint buffer.");
918 return SR_ERR_MALLOC;
919 }
920 transfer = libusb_alloc_transfer(0);
921 libusb_fill_bulk_transfer(transfer, usb->devhdl, DSO_EP_IN, buf,
922 devc->epin_maxpacketsize, cb, (void *)sdi, 40);
923 if ((ret = libusb_submit_transfer(transfer)) != 0) {
924 sr_err("Failed to submit transfer: %s.",
925 libusb_error_name(ret));
926 /* TODO: Free them all. */
927 libusb_free_transfer(transfer);
928 g_free(buf);
929 return SR_ERR;
930 }
931 }
932
933 return SR_OK;
934}
Hardware access and backend lib