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Drop SR_CONF_SET flag from SR_CONF_CONTINUOUS options
[libsigrok.git] / src / hardware / hantek-dso / api.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 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <config.h>
21#include <stdio.h>
22#include <stdint.h>
23#include <stdlib.h>
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <fcntl.h>
27#include <unistd.h>
28#include <string.h>
29#include <sys/time.h>
30#include <inttypes.h>
31#include <glib.h>
32#include <libusb.h>
33#include <libsigrok/libsigrok.h>
34#include "libsigrok-internal.h"
35#include "dso.h"
36
37/* Max time in ms before we want to check on USB events */
38/* TODO tune this properly */
39#define TICK 1
40
41#define NUM_TIMEBASE 10
42#define NUM_VDIV 8
43
44#define NUM_BUFFER_SIZES 2
45
46static const uint32_t scanopts[] = {
47 SR_CONF_CONN,
48};
49
50static const uint32_t drvopts[] = {
51 SR_CONF_OSCILLOSCOPE,
52};
53
54static const uint32_t devopts[] = {
55 SR_CONF_CONTINUOUS,
56 SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
57 SR_CONF_CONN | SR_CONF_GET,
58 SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
59 SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
60 SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
61 SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
62 SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
63 SR_CONF_NUM_HDIV | SR_CONF_GET,
64 SR_CONF_NUM_VDIV | SR_CONF_GET,
65};
66
67static const uint32_t devopts_cg[] = {
68 SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
69 SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
70 SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
71};
72
73static const char *channel_names[] = {
74 "CH1", "CH2",
75};
76
77static const uint64_t buffersizes_32k[] = {
78 (10 * 1024), (32 * 1024),
79};
80static const uint64_t buffersizes_512k[] = {
81 (10 * 1024), (512 * 1024),
82};
83static const uint64_t buffersizes_14k[] = {
84 (10 * 1024), (14 * 1024),
85};
86
87static const struct dso_profile dev_profiles[] = {
88 { 0x04b4, 0x2090, 0x04b5, 0x2090,
89 "Hantek", "DSO-2090",
90 buffersizes_32k,
91 "hantek-dso-2090.fw" },
92 { 0x04b4, 0x2150, 0x04b5, 0x2150,
93 "Hantek", "DSO-2150",
94 buffersizes_32k,
95 "hantek-dso-2150.fw" },
96 { 0x04b4, 0x2250, 0x04b5, 0x2250,
97 "Hantek", "DSO-2250",
98 buffersizes_512k,
99 "hantek-dso-2250.fw" },
100 { 0x04b4, 0x5200, 0x04b5, 0x5200,
101 "Hantek", "DSO-5200",
102 buffersizes_14k,
103 "hantek-dso-5200.fw" },
104 { 0x04b4, 0x520a, 0x04b5, 0x520a,
105 "Hantek", "DSO-5200A",
106 buffersizes_512k,
107 "hantek-dso-5200A.fw" },
108 ALL_ZERO
109};
110
111static const uint64_t timebases[][2] = {
112 /* microseconds */
113 { 10, 1000000 },
114 { 20, 1000000 },
115 { 40, 1000000 },
116 { 100, 1000000 },
117 { 200, 1000000 },
118 { 400, 1000000 },
119 /* milliseconds */
120 { 1, 1000 },
121 { 2, 1000 },
122 { 4, 1000 },
123 { 10, 1000 },
124 { 20, 1000 },
125 { 40, 1000 },
126 { 100, 1000 },
127 { 200, 1000 },
128 { 400, 1000 },
129};
130
131static const uint64_t vdivs[][2] = {
132 /* millivolts */
133 { 10, 1000 },
134 { 20, 1000 },
135 { 50, 1000 },
136 { 100, 1000 },
137 { 200, 1000 },
138 { 500, 1000 },
139 /* volts */
140 { 1, 1 },
141 { 2, 1 },
142 { 5, 1 },
143};
144
145static const char *trigger_sources[] = {
146 "CH1",
147 "CH2",
148 "EXT",
149 /* TODO: forced */
150};
151
152static const char *trigger_slopes[] = {
153 "r",
154 "f",
155};
156
157static const char *coupling[] = {
158 "AC",
159 "DC",
160 "GND",
161};
162
163SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
164
165static int dev_acquisition_stop(struct sr_dev_inst *sdi);
166
167static struct sr_dev_inst *dso_dev_new(const struct dso_profile *prof)
168{
169 struct sr_dev_inst *sdi;
170 struct sr_channel *ch;
171 struct sr_channel_group *cg;
172 struct drv_context *drvc;
173 struct dev_context *devc;
174 unsigned int i;
175
176 sdi = g_malloc0(sizeof(struct sr_dev_inst));
177 sdi->status = SR_ST_INITIALIZING;
178 sdi->vendor = g_strdup(prof->vendor);
179 sdi->model = g_strdup(prof->model);
180 sdi->driver = &hantek_dso_driver_info;
181
182 /*
183 * Add only the real channels -- EXT isn't a source of data, only
184 * a trigger source internal to the device.
185 */
186 for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
187 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
188 cg = g_malloc0(sizeof(struct sr_channel_group));
189 cg->name = g_strdup(channel_names[i]);
190 cg->channels = g_slist_append(cg->channels, ch);
191 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
192 }
193
194 devc = g_malloc0(sizeof(struct dev_context));
195 devc->profile = prof;
196 devc->dev_state = IDLE;
197 devc->timebase = DEFAULT_TIMEBASE;
198 devc->ch1_enabled = TRUE;
199 devc->ch2_enabled = TRUE;
200 devc->voltage[0] = DEFAULT_VOLTAGE;
201 devc->voltage[1] = DEFAULT_VOLTAGE;
202 devc->coupling[0] = DEFAULT_COUPLING;
203 devc->coupling[1] = DEFAULT_COUPLING;
204 devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
205 devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
206 devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
207 devc->framesize = DEFAULT_FRAMESIZE;
208 devc->triggerslope = SLOPE_POSITIVE;
209 devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
210 devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
211 sdi->priv = devc;
212 drvc = hantek_dso_driver_info.context;
213 drvc->instances = g_slist_append(drvc->instances, sdi);
214
215 return sdi;
216}
217
218static int configure_channels(const struct sr_dev_inst *sdi)
219{
220 struct dev_context *devc;
221 struct sr_channel *ch;
222 const GSList *l;
223 int p;
224
225 devc = sdi->priv;
226
227 g_slist_free(devc->enabled_channels);
228 devc->ch1_enabled = devc->ch2_enabled = FALSE;
229 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
230 ch = l->data;
231 if (p == 0)
232 devc->ch1_enabled = ch->enabled;
233 else
234 devc->ch2_enabled = ch->enabled;
235 if (ch->enabled)
236 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
237 }
238
239 return SR_OK;
240}
241
242static void clear_dev_context(void *priv)
243{
244 struct dev_context *devc;
245
246 devc = priv;
247 g_free(devc->triggersource);
248 g_slist_free(devc->enabled_channels);
249
250}
251
252static int dev_clear(const struct sr_dev_driver *di)
253{
254 return std_dev_clear(di, clear_dev_context);
255}
256
257static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
258{
259 return std_init(sr_ctx, di, LOG_PREFIX);
260}
261
262static GSList *scan(struct sr_dev_driver *di, GSList *options)
263{
264 struct drv_context *drvc;
265 struct dev_context *devc;
266 struct sr_dev_inst *sdi;
267 struct sr_usb_dev_inst *usb;
268 struct sr_config *src;
269 const struct dso_profile *prof;
270 GSList *l, *devices, *conn_devices;
271 struct libusb_device_descriptor des;
272 libusb_device **devlist;
273 int i, j;
274 const char *conn;
275 char connection_id[64];
276
277 drvc = di->context;
278
279 devices = 0;
280
281 conn = NULL;
282 for (l = options; l; l = l->next) {
283 src = l->data;
284 if (src->key == SR_CONF_CONN) {
285 conn = g_variant_get_string(src->data, NULL);
286 break;
287 }
288 }
289 if (conn)
290 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
291 else
292 conn_devices = NULL;
293
294 /* Find all Hantek DSO devices and upload firmware to all of them. */
295 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
296 for (i = 0; devlist[i]; i++) {
297 if (conn) {
298 usb = NULL;
299 for (l = conn_devices; l; l = l->next) {
300 usb = l->data;
301 if (usb->bus == libusb_get_bus_number(devlist[i])
302 && usb->address == libusb_get_device_address(devlist[i]))
303 break;
304 }
305 if (!l)
306 /* This device matched none of the ones that
307 * matched the conn specification. */
308 continue;
309 }
310
311 libusb_get_device_descriptor(devlist[i], &des);
312
313 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
314
315 prof = NULL;
316 for (j = 0; dev_profiles[j].orig_vid; j++) {
317 if (des.idVendor == dev_profiles[j].orig_vid
318 && des.idProduct == dev_profiles[j].orig_pid) {
319 /* Device matches the pre-firmware profile. */
320 prof = &dev_profiles[j];
321 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
322 sdi = dso_dev_new(prof);
323 sdi->connection_id = g_strdup(connection_id);
324 devices = g_slist_append(devices, sdi);
325 devc = sdi->priv;
326 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
327 USB_CONFIGURATION, prof->firmware) == SR_OK)
328 /* Remember when the firmware on this device was updated */
329 devc->fw_updated = g_get_monotonic_time();
330 else
331 sr_err("Firmware upload failed");
332 /* Dummy USB address of 0xff will get overwritten later. */
333 sdi->conn = sr_usb_dev_inst_new(
334 libusb_get_bus_number(devlist[i]), 0xff, NULL);
335 break;
336 } else if (des.idVendor == dev_profiles[j].fw_vid
337 && des.idProduct == dev_profiles[j].fw_pid) {
338 /* Device matches the post-firmware profile. */
339 prof = &dev_profiles[j];
340 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
341 sdi = dso_dev_new(prof);
342 sdi->connection_id = g_strdup(connection_id);
343 sdi->status = SR_ST_INACTIVE;
344 devices = g_slist_append(devices, sdi);
345 sdi->inst_type = SR_INST_USB;
346 sdi->conn = sr_usb_dev_inst_new(
347 libusb_get_bus_number(devlist[i]),
348 libusb_get_device_address(devlist[i]), NULL);
349 break;
350 }
351 }
352 if (!prof)
353 /* not a supported VID/PID */
354 continue;
355 }
356 libusb_free_device_list(devlist, 1);
357
358 return devices;
359}
360
361static int dev_open(struct sr_dev_inst *sdi)
362{
363 struct dev_context *devc;
364 struct sr_usb_dev_inst *usb;
365 int64_t timediff_us, timediff_ms;
366 int err;
367
368 devc = sdi->priv;
369 usb = sdi->conn;
370
371 /*
372 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
373 * for the FX2 to renumerate.
374 */
375 err = SR_ERR;
376 if (devc->fw_updated > 0) {
377 sr_info("Waiting for device to reset.");
378 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
379 g_usleep(300 * 1000);
380 timediff_ms = 0;
381 while (timediff_ms < MAX_RENUM_DELAY_MS) {
382 if ((err = dso_open(sdi)) == SR_OK)
383 break;
384 g_usleep(100 * 1000);
385 timediff_us = g_get_monotonic_time() - devc->fw_updated;
386 timediff_ms = timediff_us / 1000;
387 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
388 }
389 sr_info("Device came back after %" PRIi64 " ms.", timediff_ms);
390 } else {
391 err = dso_open(sdi);
392 }
393
394 if (err != SR_OK) {
395 sr_err("Unable to open device.");
396 return SR_ERR;
397 }
398
399 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
400 if (err != 0) {
401 sr_err("Unable to claim interface: %s.",
402 libusb_error_name(err));
403 return SR_ERR;
404 }
405
406 return SR_OK;
407}
408
409static int dev_close(struct sr_dev_inst *sdi)
410{
411 dso_close(sdi);
412
413 return SR_OK;
414}
415
416static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
417 const struct sr_channel_group *cg)
418{
419 struct dev_context *devc;
420 struct sr_usb_dev_inst *usb;
421 char str[128];
422 const char *s;
423 const uint64_t *vdiv;
424 int ch_idx;
425
426 switch (key) {
427 case SR_CONF_NUM_HDIV:
428 *data = g_variant_new_int32(NUM_TIMEBASE);
429 break;
430 case SR_CONF_NUM_VDIV:
431 *data = g_variant_new_int32(NUM_VDIV);
432 break;
433 }
434
435 if (!sdi)
436 return SR_ERR_ARG;
437
438 devc = sdi->priv;
439 if (!cg) {
440 switch (key) {
441 case SR_CONF_CONN:
442 if (!sdi->conn)
443 return SR_ERR_ARG;
444 usb = sdi->conn;
445 if (usb->address == 255)
446 /* Device still needs to re-enumerate after firmware
447 * upload, so we don't know its (future) address. */
448 return SR_ERR;
449 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
450 *data = g_variant_new_string(str);
451 break;
452 case SR_CONF_TIMEBASE:
453 *data = g_variant_new("(tt)", timebases[devc->timebase][0],
454 timebases[devc->timebase][1]);
455 break;
456 case SR_CONF_BUFFERSIZE:
457 *data = g_variant_new_uint64(devc->framesize);
458 break;
459 case SR_CONF_TRIGGER_SOURCE:
460 *data = g_variant_new_string(devc->triggersource);
461 break;
462 case SR_CONF_TRIGGER_SLOPE:
463 s = (devc->triggerslope == SLOPE_POSITIVE) ? "r" : "f";
464 *data = g_variant_new_string(s);
465 break;
466 case SR_CONF_HORIZ_TRIGGERPOS:
467 *data = g_variant_new_double(devc->triggerposition);
468 break;
469 default:
470 return SR_ERR_NA;
471 }
472 } else {
473 if (sdi->channel_groups->data == cg)
474 ch_idx = 0;
475 else if (sdi->channel_groups->next->data == cg)
476 ch_idx = 1;
477 else
478 return SR_ERR_ARG;
479 switch (key) {
480 case SR_CONF_FILTER:
481 *data = g_variant_new_boolean(devc->filter[ch_idx]);
482 break;
483 case SR_CONF_VDIV:
484 vdiv = vdivs[devc->voltage[ch_idx]];
485 *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
486 break;
487 case SR_CONF_COUPLING:
488 *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
489 break;
490 }
491 }
492
493 return SR_OK;
494}
495
496static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
497 const struct sr_channel_group *cg)
498{
499 struct dev_context *devc;
500 double tmp_double;
501 uint64_t tmp_u64, p, q;
502 int tmp_int, ch_idx, ret;
503 unsigned int i;
504 const char *tmp_str;
505
506 if (sdi->status != SR_ST_ACTIVE)
507 return SR_ERR_DEV_CLOSED;
508
509 ret = SR_OK;
510 devc = sdi->priv;
511 if (!cg) {
512 switch (key) {
513 case SR_CONF_LIMIT_FRAMES:
514 devc->limit_frames = g_variant_get_uint64(data);
515 break;
516 case SR_CONF_TRIGGER_SLOPE:
517 tmp_str = g_variant_get_string(data, NULL);
518 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
519 return SR_ERR_ARG;
520 devc->triggerslope = (tmp_str[0] == 'r')
521 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
522 break;
523 case SR_CONF_HORIZ_TRIGGERPOS:
524 tmp_double = g_variant_get_double(data);
525 if (tmp_double < 0.0 || tmp_double > 1.0) {
526 sr_err("Trigger position should be between 0.0 and 1.0.");
527 ret = SR_ERR_ARG;
528 } else
529 devc->triggerposition = tmp_double;
530 break;
531 case SR_CONF_BUFFERSIZE:
532 tmp_u64 = g_variant_get_uint64(data);
533 for (i = 0; i < NUM_BUFFER_SIZES; i++) {
534 if (devc->profile->buffersizes[i] == tmp_u64) {
535 devc->framesize = tmp_u64;
536 break;
537 }
538 }
539 if (i == NUM_BUFFER_SIZES)
540 ret = SR_ERR_ARG;
541 break;
542 case SR_CONF_TIMEBASE:
543 g_variant_get(data, "(tt)", &p, &q);
544 tmp_int = -1;
545 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
546 if (timebases[i][0] == p && timebases[i][1] == q) {
547 tmp_int = i;
548 break;
549 }
550 }
551 if (tmp_int >= 0)
552 devc->timebase = tmp_int;
553 else
554 ret = SR_ERR_ARG;
555 break;
556 case SR_CONF_TRIGGER_SOURCE:
557 tmp_str = g_variant_get_string(data, NULL);
558 for (i = 0; trigger_sources[i]; i++) {
559 if (!strcmp(tmp_str, trigger_sources[i])) {
560 devc->triggersource = g_strdup(tmp_str);
561 break;
562 }
563 }
564 if (trigger_sources[i] == 0)
565 ret = SR_ERR_ARG;
566 break;
567 default:
568 ret = SR_ERR_NA;
569 break;
570 }
571 } else {
572 if (sdi->channel_groups->data == cg)
573 ch_idx = 0;
574 else if (sdi->channel_groups->next->data == cg)
575 ch_idx = 1;
576 else
577 return SR_ERR_ARG;
578 switch (key) {
579 case SR_CONF_FILTER:
580 devc->filter[ch_idx] = g_variant_get_boolean(data);
581 break;
582 case SR_CONF_VDIV:
583 g_variant_get(data, "(tt)", &p, &q);
584 tmp_int = -1;
585 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
586 if (vdivs[i][0] == p && vdivs[i][1] == q) {
587 tmp_int = i;
588 break;
589 }
590 }
591 if (tmp_int >= 0) {
592 devc->voltage[ch_idx] = tmp_int;
593 } else
594 ret = SR_ERR_ARG;
595 break;
596 case SR_CONF_COUPLING:
597 tmp_str = g_variant_get_string(data, NULL);
598 for (i = 0; coupling[i]; i++) {
599 if (!strcmp(tmp_str, coupling[i])) {
600 devc->coupling[ch_idx] = i;
601 break;
602 }
603 }
604 if (coupling[i] == 0)
605 ret = SR_ERR_ARG;
606 break;
607 default:
608 ret = SR_ERR_NA;
609 break;
610 }
611 }
612
613 return ret;
614}
615
616static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
617 const struct sr_channel_group *cg)
618{
619 struct dev_context *devc;
620 GVariant *tuple, *rational[2];
621 GVariantBuilder gvb;
622 unsigned int i;
623
624 if (key == SR_CONF_SCAN_OPTIONS) {
625 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
626 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
627 return SR_OK;
628 } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
629 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
630 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
631 return SR_OK;
632 }
633
634 if (!sdi)
635 return SR_ERR_ARG;
636
637 if (!cg) {
638 switch (key) {
639 case SR_CONF_DEVICE_OPTIONS:
640 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
641 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
642 break;
643 case SR_CONF_BUFFERSIZE:
644 if (!sdi)
645 return SR_ERR_ARG;
646 devc = sdi->priv;
647 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
648 devc->profile->buffersizes, NUM_BUFFER_SIZES, sizeof(uint64_t));
649 break;
650 case SR_CONF_TIMEBASE:
651 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
652 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
653 rational[0] = g_variant_new_uint64(timebases[i][0]);
654 rational[1] = g_variant_new_uint64(timebases[i][1]);
655 tuple = g_variant_new_tuple(rational, 2);
656 g_variant_builder_add_value(&gvb, tuple);
657 }
658 *data = g_variant_builder_end(&gvb);
659 break;
660 case SR_CONF_TRIGGER_SOURCE:
661 *data = g_variant_new_strv(trigger_sources,
662 ARRAY_SIZE(trigger_sources));
663 break;
664 case SR_CONF_TRIGGER_SLOPE:
665 *data = g_variant_new_strv(trigger_slopes,
666 ARRAY_SIZE(trigger_slopes));
667 break;
668 default:
669 return SR_ERR_NA;
670 }
671 } else {
672 switch (key) {
673 case SR_CONF_DEVICE_OPTIONS:
674 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
675 devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
676 break;
677 case SR_CONF_COUPLING:
678 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
679 break;
680 case SR_CONF_VDIV:
681 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
682 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
683 rational[0] = g_variant_new_uint64(vdivs[i][0]);
684 rational[1] = g_variant_new_uint64(vdivs[i][1]);
685 tuple = g_variant_new_tuple(rational, 2);
686 g_variant_builder_add_value(&gvb, tuple);
687 }
688 *data = g_variant_builder_end(&gvb);
689 break;
690 default:
691 return SR_ERR_NA;
692 }
693 }
694
695 return SR_OK;
696}
697
698static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
699 int num_samples)
700{
701 struct sr_datafeed_packet packet;
702 struct sr_datafeed_analog_old analog;
703 struct dev_context *devc;
704 float ch1, ch2, range;
705 int num_channels, data_offset, i;
706
707 devc = sdi->priv;
708 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
709 packet.type = SR_DF_ANALOG_OLD;
710 packet.payload = &analog;
711 /* TODO: support for 5xxx series 9-bit samples */
712 analog.channels = devc->enabled_channels;
713 analog.num_samples = num_samples;
714 analog.mq = SR_MQ_VOLTAGE;
715 analog.unit = SR_UNIT_VOLT;
716 analog.mqflags = 0;
717 /* TODO: Check malloc return value. */
718 analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
719 data_offset = 0;
720 for (i = 0; i < analog.num_samples; i++) {
721 /*
722 * The device always sends data for both channels. If a channel
723 * is disabled, it contains a copy of the enabled channel's
724 * data. However, we only send the requested channels to
725 * the bus.
726 *
727 * Voltage values are encoded as a value 0-255 (0-512 on the
728 * DSO-5200*), where the value is a point in the range
729 * represented by the vdiv setting. There are 8 vertical divs,
730 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
731 * and 255 = +2V.
732 */
733 /* TODO: Support for DSO-5xxx series 9-bit samples. */
734 if (devc->ch1_enabled) {
735 range = ((float)vdivs[devc->voltage[0]][0] / vdivs[devc->voltage[0]][1]) * 8;
736 ch1 = range / 255 * *(buf + i * 2 + 1);
737 /* Value is centered around 0V. */
738 ch1 -= range / 2;
739 analog.data[data_offset++] = ch1;
740 }
741 if (devc->ch2_enabled) {
742 range = ((float)vdivs[devc->voltage[1]][0] / vdivs[devc->voltage[1]][1]) * 8;
743 ch2 = range / 255 * *(buf + i * 2);
744 ch2 -= range / 2;
745 analog.data[data_offset++] = ch2;
746 }
747 }
748 sr_session_send(sdi, &packet);
749 g_free(analog.data);
750}
751
752/*
753 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
754 * Only channel data comes in asynchronously, and all transfers for this are
755 * queued up beforehand, so this just needs to chuck the incoming data onto
756 * the libsigrok session bus.
757 */
758static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
759{
760 struct sr_datafeed_packet packet;
761 struct sr_dev_inst *sdi;
762 struct dev_context *devc;
763 int num_samples, pre;
764
765 sdi = transfer->user_data;
766 devc = sdi->priv;
767 sr_spew("receive_transfer(): status %s received %d bytes.",
768 libusb_error_name(transfer->status), transfer->actual_length);
769
770 if (transfer->actual_length == 0)
771 /* Nothing to send to the bus. */
772 return;
773
774 num_samples = transfer->actual_length / 2;
775
776 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
777 devc->samp_received + num_samples, devc->framesize);
778
779 /*
780 * The device always sends a full frame, but the beginning of the frame
781 * doesn't represent the trigger point. The offset at which the trigger
782 * happened came in with the capture state, so we need to start sending
783 * from there up the session bus. The samples in the frame buffer
784 * before that trigger point came after the end of the device's frame
785 * buffer was reached, and it wrapped around to overwrite up until the
786 * trigger point.
787 */
788 if (devc->samp_received < devc->trigger_offset) {
789 /* Trigger point not yet reached. */
790 if (devc->samp_received + num_samples < devc->trigger_offset) {
791 /* The entire chunk is before the trigger point. */
792 memcpy(devc->framebuf + devc->samp_buffered * 2,
793 transfer->buffer, num_samples * 2);
794 devc->samp_buffered += num_samples;
795 } else {
796 /*
797 * This chunk hits or overruns the trigger point.
798 * Store the part before the trigger fired, and
799 * send the rest up to the session bus.
800 */
801 pre = devc->trigger_offset - devc->samp_received;
802 memcpy(devc->framebuf + devc->samp_buffered * 2,
803 transfer->buffer, pre * 2);
804 devc->samp_buffered += pre;
805
806 /* The rest of this chunk starts with the trigger point. */
807 sr_dbg("Reached trigger point, %d samples buffered.",
808 devc->samp_buffered);
809
810 /* Avoid the corner case where the chunk ended at
811 * exactly the trigger point. */
812 if (num_samples > pre)
813 send_chunk(sdi, transfer->buffer + pre * 2,
814 num_samples - pre);
815 }
816 } else {
817 /* Already past the trigger point, just send it all out. */
818 send_chunk(sdi, transfer->buffer, num_samples);
819 }
820
821 devc->samp_received += num_samples;
822
823 /* Everything in this transfer was either copied to the buffer or
824 * sent to the session bus. */
825 g_free(transfer->buffer);
826 libusb_free_transfer(transfer);
827
828 if (devc->samp_received >= devc->framesize) {
829 /* That was the last chunk in this frame. Send the buffered
830 * pre-trigger samples out now, in one big chunk. */
831 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
832 devc->samp_buffered);
833 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
834
835 /* Mark the end of this frame. */
836 packet.type = SR_DF_FRAME_END;
837 sr_session_send(sdi, &packet);
838
839 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
840 /* Terminate session */
841 devc->dev_state = STOPPING;
842 } else {
843 devc->dev_state = NEW_CAPTURE;
844 }
845 }
846}
847
848static int handle_event(int fd, int revents, void *cb_data)
849{
850 const struct sr_dev_inst *sdi;
851 struct sr_datafeed_packet packet;
852 struct timeval tv;
853 struct sr_dev_driver *di;
854 struct dev_context *devc;
855 struct drv_context *drvc;
856 int num_channels;
857 uint32_t trigger_offset;
858 uint8_t capturestate;
859
860 (void)fd;
861 (void)revents;
862
863 sdi = cb_data;
864 di = sdi->driver;
865 drvc = di->context;
866 devc = sdi->priv;
867 if (devc->dev_state == STOPPING) {
868 /* We've been told to wind up the acquisition. */
869 sr_dbg("Stopping acquisition.");
870 /*
871 * TODO: Doesn't really cancel pending transfers so they might
872 * come in after SR_DF_END is sent.
873 */
874 usb_source_remove(sdi->session, drvc->sr_ctx);
875
876 std_session_send_df_end(sdi, LOG_PREFIX);
877
878 devc->dev_state = IDLE;
879
880 return TRUE;
881 }
882
883 /* Always handle pending libusb events. */
884 tv.tv_sec = tv.tv_usec = 0;
885 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
886
887 /* TODO: ugh */
888 if (devc->dev_state == NEW_CAPTURE) {
889 if (dso_capture_start(sdi) != SR_OK)
890 return TRUE;
891 if (dso_enable_trigger(sdi) != SR_OK)
892 return TRUE;
893// if (dso_force_trigger(sdi) != SR_OK)
894// return TRUE;
895 sr_dbg("Successfully requested next chunk.");
896 devc->dev_state = CAPTURE;
897 return TRUE;
898 }
899 if (devc->dev_state != CAPTURE)
900 return TRUE;
901
902 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
903 return TRUE;
904
905 sr_dbg("Capturestate %d.", capturestate);
906 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
907 switch (capturestate) {
908 case CAPTURE_EMPTY:
909 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
910 devc->capture_empty_count = 0;
911 if (dso_capture_start(sdi) != SR_OK)
912 break;
913 if (dso_enable_trigger(sdi) != SR_OK)
914 break;
915// if (dso_force_trigger(sdi) != SR_OK)
916// break;
917 sr_dbg("Successfully requested next chunk.");
918 }
919 break;
920 case CAPTURE_FILLING:
921 /* No data yet. */
922 break;
923 case CAPTURE_READY_8BIT:
924 /* Remember where in the captured frame the trigger is. */
925 devc->trigger_offset = trigger_offset;
926
927 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
928 devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
929 devc->samp_buffered = devc->samp_received = 0;
930
931 /* Tell the scope to send us the first frame. */
932 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
933 break;
934
935 /*
936 * Don't hit the state machine again until we're done fetching
937 * the data we just told the scope to send.
938 */
939 devc->dev_state = FETCH_DATA;
940
941 /* Tell the frontend a new frame is on the way. */
942 packet.type = SR_DF_FRAME_BEGIN;
943 sr_session_send(sdi, &packet);
944 break;
945 case CAPTURE_READY_9BIT:
946 /* TODO */
947 sr_err("Not yet supported.");
948 break;
949 case CAPTURE_TIMEOUT:
950 /* Doesn't matter, we'll try again next time. */
951 break;
952 default:
953 sr_dbg("Unknown capture state: %d.", capturestate);
954 break;
955 }
956
957 return TRUE;
958}
959
960static int dev_acquisition_start(const struct sr_dev_inst *sdi)
961{
962 struct dev_context *devc;
963 struct sr_dev_driver *di = sdi->driver;
964 struct drv_context *drvc = di->context;
965
966 if (sdi->status != SR_ST_ACTIVE)
967 return SR_ERR_DEV_CLOSED;
968
969 devc = sdi->priv;
970
971 if (configure_channels(sdi) != SR_OK) {
972 sr_err("Failed to configure channels.");
973 return SR_ERR;
974 }
975
976 if (dso_init(sdi) != SR_OK)
977 return SR_ERR;
978
979 if (dso_capture_start(sdi) != SR_OK)
980 return SR_ERR;
981
982 devc->dev_state = CAPTURE;
983 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
984
985 std_session_send_df_header(sdi, LOG_PREFIX);
986
987 return SR_OK;
988}
989
990static int dev_acquisition_stop(struct sr_dev_inst *sdi)
991{
992 struct dev_context *devc;
993
994 if (sdi->status != SR_ST_ACTIVE)
995 return SR_ERR;
996
997 devc = sdi->priv;
998 devc->dev_state = STOPPING;
999
1000 return SR_OK;
1001}
1002
1003SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
1004 .name = "hantek-dso",
1005 .longname = "Hantek DSO",
1006 .api_version = 1,
1007 .init = init,
1008 .cleanup = std_cleanup,
1009 .scan = scan,
1010 .dev_list = std_dev_list,
1011 .dev_clear = dev_clear,
1012 .config_get = config_get,
1013 .config_set = config_set,
1014 .config_list = config_list,
1015 .dev_open = dev_open,
1016 .dev_close = dev_close,
1017 .dev_acquisition_start = dev_acquisition_start,
1018 .dev_acquisition_stop = dev_acquisition_stop,
1019 .context = NULL,
1020};