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rigol-ds: Fix capabilities listing in config_list()
[libsigrok.git] / src / hardware / hantek-6xxx / api.c
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1/*
2 * This file is part of the libsigrok project.
3 *
4 * Copyright (C) 2015 Christer Ekholm <christerekholm@gmail.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 <math.h>
22#include "protocol.h"
23
24/* Max time in ms before we want to check on USB events */
25#define TICK 200
26
27#define RANGE(ch) (((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * VDIV_MULTIPLIER)
28
29static const uint32_t scanopts[] = {
30 SR_CONF_CONN,
31};
32
33static const uint32_t drvopts[] = {
34 SR_CONF_OSCILLOSCOPE,
35};
36
37static const uint32_t devopts[] = {
38 SR_CONF_CONN | SR_CONF_GET,
39 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
40 SR_CONF_NUM_VDIV | SR_CONF_GET,
41 SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
42 SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
43};
44
45static const uint32_t devopts_cg[] = {
46 SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
47 SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
48};
49
50static const char *channel_names[] = {
51 "CH1", "CH2",
52};
53
54static const char *dc_coupling[] = {
55 "DC", "DC",
56};
57
58static const char *acdc_coupling[] = {
59 "AC", "DC",
60};
61
62static const struct hantek_6xxx_profile dev_profiles[] = {
63 {
64 0x04b4, 0x6022, 0x1d50, 0x608e, 0x0001,
65 "Hantek", "6022BE", "fx2lafw-hantek-6022be.fw",
66 dc_coupling, ARRAY_SIZE(dc_coupling), FALSE,
67 },
68 {
69 0x8102, 0x8102, 0x1d50, 0x608e, 0x0002,
70 "Sainsmart", "DDS120", "fx2lafw-sainsmart-dds120.fw",
71 acdc_coupling, ARRAY_SIZE(acdc_coupling), TRUE,
72 },
73 {
74 0x04b4, 0x602a, 0x1d50, 0x608e, 0x0003,
75 "Hantek", "6022BL", "fx2lafw-hantek-6022bl.fw",
76 dc_coupling, ARRAY_SIZE(dc_coupling), FALSE,
77 },
78 ALL_ZERO
79};
80
81static const uint64_t samplerates[] = {
82 SAMPLERATE_VALUES
83};
84
85static const uint64_t vdivs[][2] = {
86 VDIV_VALUES
87};
88
89static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount);
90
91static int dev_acquisition_stop(struct sr_dev_inst *sdi);
92
93static struct sr_dev_inst *hantek_6xxx_dev_new(const struct hantek_6xxx_profile *prof)
94{
95 struct sr_dev_inst *sdi;
96 struct sr_channel *ch;
97 struct sr_channel_group *cg;
98 struct dev_context *devc;
99 unsigned int i;
100
101 sdi = g_malloc0(sizeof(struct sr_dev_inst));
102 sdi->status = SR_ST_INITIALIZING;
103 sdi->vendor = g_strdup(prof->vendor);
104 sdi->model = g_strdup(prof->model);
105
106 for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
107 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
108 cg = g_malloc0(sizeof(struct sr_channel_group));
109 cg->name = g_strdup(channel_names[i]);
110 cg->channels = g_slist_append(cg->channels, ch);
111 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
112 }
113
114 devc = g_malloc0(sizeof(struct dev_context));
115
116 for (i = 0; i < NUM_CHANNELS; i++) {
117 devc->ch_enabled[i] = TRUE;
118 devc->voltage[i] = DEFAULT_VOLTAGE;
119 devc->coupling[i] = DEFAULT_COUPLING;
120 }
121 devc->coupling_vals = prof->coupling_vals;
122 devc->coupling_tab_size = prof->coupling_tab_size;
123
124 devc->sample_buf = NULL;
125 devc->sample_buf_write = 0;
126 devc->sample_buf_size = 0;
127
128 devc->profile = prof;
129 devc->dev_state = IDLE;
130 devc->samplerate = DEFAULT_SAMPLERATE;
131
132 sdi->priv = devc;
133
134 return sdi;
135}
136
137static int configure_channels(const struct sr_dev_inst *sdi)
138{
139 struct dev_context *devc;
140 const GSList *l;
141 int p;
142 struct sr_channel *ch;
143 devc = sdi->priv;
144
145 g_slist_free(devc->enabled_channels);
146 devc->enabled_channels = NULL;
147 memset(devc->ch_enabled, 0, sizeof(devc->ch_enabled));
148
149 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
150 ch = l->data;
151 if (p < NUM_CHANNELS) {
152 devc->ch_enabled[p] = ch->enabled;
153 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
154 }
155 }
156
157 return SR_OK;
158}
159
160static void clear_dev_context(void *priv)
161{
162 struct dev_context *devc;
163
164 devc = priv;
165 g_slist_free(devc->enabled_channels);
166 g_free(devc);
167}
168
169static int dev_clear(const struct sr_dev_driver *di)
170{
171 return std_dev_clear(di, clear_dev_context);
172}
173
174static GSList *scan(struct sr_dev_driver *di, GSList *options)
175{
176 struct drv_context *drvc;
177 struct dev_context *devc;
178 struct sr_dev_inst *sdi;
179 struct sr_usb_dev_inst *usb;
180 struct sr_config *src;
181 const struct hantek_6xxx_profile *prof;
182 GSList *l, *devices, *conn_devices;
183 struct libusb_device_descriptor des;
184 libusb_device **devlist;
185 int i, j;
186 const char *conn;
187 char connection_id[64];
188
189 drvc = di->context;
190
191 devices = 0;
192
193 conn = NULL;
194 for (l = options; l; l = l->next) {
195 src = l->data;
196 if (src->key == SR_CONF_CONN) {
197 conn = g_variant_get_string(src->data, NULL);
198 break;
199 }
200 }
201 if (conn)
202 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
203 else
204 conn_devices = NULL;
205
206 /* Find all Hantek 60xx devices and upload firmware to all of them. */
207 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
208 for (i = 0; devlist[i]; i++) {
209 if (conn) {
210 usb = NULL;
211 for (l = conn_devices; l; l = l->next) {
212 usb = l->data;
213 if (usb->bus == libusb_get_bus_number(devlist[i])
214 && usb->address == libusb_get_device_address(devlist[i]))
215 break;
216 }
217 if (!l)
218 /* This device matched none of the ones that
219 * matched the conn specification. */
220 continue;
221 }
222
223 libusb_get_device_descriptor(devlist[i], &des);
224
225 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
226
227 prof = NULL;
228 for (j = 0; dev_profiles[j].orig_vid; j++) {
229 if (des.idVendor == dev_profiles[j].orig_vid
230 && des.idProduct == dev_profiles[j].orig_pid) {
231 /* Device matches the pre-firmware profile. */
232 prof = &dev_profiles[j];
233 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
234 sdi = hantek_6xxx_dev_new(prof);
235 sdi->connection_id = g_strdup(connection_id);
236 devices = g_slist_append(devices, sdi);
237 devc = sdi->priv;
238 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
239 USB_CONFIGURATION, prof->firmware) == SR_OK)
240 /* Remember when the firmware on this device was updated. */
241 devc->fw_updated = g_get_monotonic_time();
242 else
243 sr_err("Firmware upload failed.");
244 /* Dummy USB address of 0xff will get overwritten later. */
245 sdi->conn = sr_usb_dev_inst_new(
246 libusb_get_bus_number(devlist[i]), 0xff, NULL);
247 break;
248 } else if (des.idVendor == dev_profiles[j].fw_vid
249 && des.idProduct == dev_profiles[j].fw_pid
250 && des.bcdDevice == dev_profiles[j].fw_prod_ver) {
251 /* Device matches the post-firmware profile. */
252 prof = &dev_profiles[j];
253 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
254 sdi = hantek_6xxx_dev_new(prof);
255 sdi->connection_id = g_strdup(connection_id);
256 sdi->status = SR_ST_INACTIVE;
257 devices = g_slist_append(devices, sdi);
258 sdi->inst_type = SR_INST_USB;
259 sdi->conn = sr_usb_dev_inst_new(
260 libusb_get_bus_number(devlist[i]),
261 libusb_get_device_address(devlist[i]), NULL);
262 break;
263 }
264 }
265 if (!prof)
266 /* Not a supported VID/PID. */
267 continue;
268 }
269 libusb_free_device_list(devlist, 1);
270
271 return std_scan_complete(di, devices);
272}
273
274static int dev_open(struct sr_dev_inst *sdi)
275{
276 struct dev_context *devc;
277 struct sr_usb_dev_inst *usb;
278 int64_t timediff_us, timediff_ms;
279 int err;
280
281 devc = sdi->priv;
282 usb = sdi->conn;
283
284 /*
285 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
286 * for the FX2 to renumerate.
287 */
288 err = SR_ERR;
289 if (devc->fw_updated > 0) {
290 sr_info("Waiting for device to reset.");
291 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
292 g_usleep(300 * 1000);
293 timediff_ms = 0;
294 while (timediff_ms < MAX_RENUM_DELAY_MS) {
295 if ((err = hantek_6xxx_open(sdi)) == SR_OK)
296 break;
297 g_usleep(100 * 1000);
298 timediff_us = g_get_monotonic_time() - devc->fw_updated;
299 timediff_ms = timediff_us / 1000;
300 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
301 }
302 if (timediff_ms < MAX_RENUM_DELAY_MS)
303 sr_info("Device came back after %"PRIu64" ms.", timediff_ms);
304 } else {
305 err = hantek_6xxx_open(sdi);
306 }
307
308 if (err != SR_OK) {
309 sr_err("Unable to open device.");
310 return SR_ERR;
311 }
312
313 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
314 if (err != 0) {
315 sr_err("Unable to claim interface: %s.",
316 libusb_error_name(err));
317 return SR_ERR;
318 }
319
320 return SR_OK;
321}
322
323static int dev_close(struct sr_dev_inst *sdi)
324{
325 hantek_6xxx_close(sdi);
326
327 return SR_OK;
328}
329
330static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
331 const struct sr_channel_group *cg)
332{
333 struct dev_context *devc;
334 struct sr_usb_dev_inst *usb;
335 char str[128];
336 const uint64_t *vdiv;
337 int ch_idx;
338
339 switch (key) {
340 case SR_CONF_NUM_VDIV:
341 *data = g_variant_new_int32(ARRAY_SIZE(vdivs));
342 break;
343 }
344
345 if (!sdi)
346 return SR_ERR_ARG;
347
348 devc = sdi->priv;
349 if (!cg) {
350 switch (key) {
351 case SR_CONF_SAMPLERATE:
352 *data = g_variant_new_uint64(devc->samplerate);
353 break;
354 case SR_CONF_LIMIT_MSEC:
355 *data = g_variant_new_uint64(devc->limit_msec);
356 break;
357 case SR_CONF_LIMIT_SAMPLES:
358 *data = g_variant_new_uint64(devc->limit_samples);
359 break;
360 case SR_CONF_CONN:
361 if (!sdi->conn)
362 return SR_ERR_ARG;
363 usb = sdi->conn;
364 if (usb->address == 255)
365 /* Device still needs to re-enumerate after firmware
366 * upload, so we don't know its (future) address. */
367 return SR_ERR;
368 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
369 *data = g_variant_new_string(str);
370 break;
371 default:
372 return SR_ERR_NA;
373 }
374 } else {
375 if (sdi->channel_groups->data == cg)
376 ch_idx = 0;
377 else if (sdi->channel_groups->next->data == cg)
378 ch_idx = 1;
379 else
380 return SR_ERR_ARG;
381 switch (key) {
382 case SR_CONF_VDIV:
383 vdiv = vdivs[devc->voltage[ch_idx]];
384 *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
385 break;
386 case SR_CONF_COUPLING:
387 *data = g_variant_new_string(devc->coupling_vals[devc->coupling[ch_idx]]);
388 break;
389 }
390 }
391
392 return SR_OK;
393}
394
395static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
396 const struct sr_channel_group *cg)
397{
398 struct dev_context *devc;
399 uint64_t p, q;
400 int tmp_int, ch_idx, ret;
401 unsigned int i;
402 const char *tmp_str;
403
404 if (sdi->status != SR_ST_ACTIVE)
405 return SR_ERR_DEV_CLOSED;
406
407 ret = SR_OK;
408 devc = sdi->priv;
409 if (!cg) {
410 switch (key) {
411 case SR_CONF_SAMPLERATE:
412 devc->samplerate = g_variant_get_uint64(data);
413 hantek_6xxx_update_samplerate(sdi);
414 break;
415 case SR_CONF_LIMIT_MSEC:
416 devc->limit_msec = g_variant_get_uint64(data);
417 break;
418 case SR_CONF_LIMIT_SAMPLES:
419 devc->limit_samples = g_variant_get_uint64(data);
420 break;
421 default:
422 ret = SR_ERR_NA;
423 break;
424 }
425 } else {
426 if (sdi->channel_groups->data == cg)
427 ch_idx = 0;
428 else if (sdi->channel_groups->next->data == cg)
429 ch_idx = 1;
430 else
431 return SR_ERR_ARG;
432 switch (key) {
433 case SR_CONF_VDIV:
434 g_variant_get(data, "(tt)", &p, &q);
435 tmp_int = -1;
436 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
437 if (vdivs[i][0] == p && vdivs[i][1] == q) {
438 tmp_int = i;
439 break;
440 }
441 }
442 if (tmp_int >= 0) {
443 devc->voltage[ch_idx] = tmp_int;
444 hantek_6xxx_update_vdiv(sdi);
445 } else
446 ret = SR_ERR_ARG;
447 break;
448 case SR_CONF_COUPLING:
449 tmp_str = g_variant_get_string(data, NULL);
450 for (i = 0; i < devc->coupling_tab_size; i++) {
451 if (!strcmp(tmp_str, devc->coupling_vals[i])) {
452 devc->coupling[ch_idx] = i;
453 break;
454 }
455 }
456 if (i == devc->coupling_tab_size)
457 ret = SR_ERR_ARG;
458 break;
459 default:
460 ret = SR_ERR_NA;
461 break;
462 }
463 }
464
465 return ret;
466}
467
468static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
469 const struct sr_channel_group *cg)
470{
471 GVariant *tuple, *rational[2];
472 GVariantBuilder gvb;
473 unsigned int i;
474 GVariant *gvar;
475 struct dev_context *devc = NULL;
476
477 if (key == SR_CONF_SCAN_OPTIONS) {
478 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
479 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
480 return SR_OK;
481 } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
482 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
483 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
484 return SR_OK;
485 }
486
487 if (sdi)
488 devc = sdi->priv;
489
490 if (!cg) {
491 switch (key) {
492 case SR_CONF_DEVICE_OPTIONS:
493 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
494 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
495 break;
496 case SR_CONF_SAMPLERATE:
497 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
498 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
499 samplerates, ARRAY_SIZE(samplerates),
500 sizeof(uint64_t));
501 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
502 *data = g_variant_builder_end(&gvb);
503 break;
504 default:
505 return SR_ERR_NA;
506 }
507 } else {
508 switch (key) {
509 case SR_CONF_DEVICE_OPTIONS:
510 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
511 devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
512 break;
513 case SR_CONF_COUPLING:
514 if (!devc)
515 return SR_ERR_NA;
516 *data = g_variant_new_strv(devc->coupling_vals, devc->coupling_tab_size);
517 break;
518 case SR_CONF_VDIV:
519 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
520 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
521 rational[0] = g_variant_new_uint64(vdivs[i][0]);
522 rational[1] = g_variant_new_uint64(vdivs[i][1]);
523 tuple = g_variant_new_tuple(rational, 2);
524 g_variant_builder_add_value(&gvb, tuple);
525 }
526 *data = g_variant_builder_end(&gvb);
527 break;
528 default:
529 return SR_ERR_NA;
530 }
531 }
532
533 return SR_OK;
534}
535
536/* Minimise data amount for limit_samples and limit_msec limits. */
537static uint32_t data_amount(const struct sr_dev_inst *sdi)
538{
539 struct dev_context *devc = sdi->priv;
540 uint32_t data_left, data_left_2, i;
541 int32_t time_left;
542
543 if (devc->limit_msec) {
544 time_left = devc->limit_msec - (g_get_monotonic_time() - devc->aq_started) / 1000;
545 data_left = devc->samplerate * MAX(time_left, 0) * NUM_CHANNELS / 1000;
546 } else if (devc->limit_samples) {
547 data_left = (devc->limit_samples - devc->samp_received) * NUM_CHANNELS;
548 } else {
549 data_left = devc->samplerate * NUM_CHANNELS;
550 }
551
552 /* Round up to nearest power of two. */
553 for (i = MIN_PACKET_SIZE; i < data_left; i *= 2)
554 ;
555 data_left_2 = i;
556
557 sr_spew("data_amount: %u (rounded to power of 2: %u)", data_left, data_left_2);
558
559 return data_left_2;
560}
561
562static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
563 int num_samples)
564{
565 struct sr_datafeed_packet packet;
566 struct sr_datafeed_analog analog;
567 struct sr_analog_encoding encoding;
568 struct sr_analog_meaning meaning;
569 struct sr_analog_spec spec;
570 struct dev_context *devc = sdi->priv;
571 GSList *channels = devc->enabled_channels;
572
573 const float ch_bit[] = { RANGE(0) / 255, RANGE(1) / 255 };
574 const float ch_center[] = { RANGE(0) / 2, RANGE(1) / 2 };
575
576 sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
577
578 packet.type = SR_DF_ANALOG;
579 packet.payload = &analog;
580
581 analog.num_samples = num_samples;
582 analog.meaning->mq = SR_MQ_VOLTAGE;
583 analog.meaning->unit = SR_UNIT_VOLT;
584 analog.meaning->mqflags = 0;
585
586 analog.data = g_try_malloc(num_samples * sizeof(float));
587 if (!analog.data) {
588 sr_err("Analog data buffer malloc failed.");
589 devc->dev_state = STOPPING;
590 return;
591 }
592
593 for (int ch = 0; ch < 2; ch++) {
594 if (!devc->ch_enabled[ch])
595 continue;
596
597 float vdivlog = log10f(ch_bit[ch]);
598 int digits = -(int)vdivlog + (vdivlog < 0.0);
599 analog.encoding->digits = digits;
600 analog.spec->spec_digits = digits;
601 analog.meaning->channels = g_slist_append(NULL, channels->data);
602
603 for (int i = 0; i < num_samples; i++) {
604 /*
605 * The device always sends data for both channels. If a channel
606 * is disabled, it contains a copy of the enabled channel's
607 * data. However, we only send the requested channels to
608 * the bus.
609 *
610 * Voltage values are encoded as a value 0-255, where the
611 * value is a point in the range represented by the vdiv
612 * setting. There are 10 vertical divs, so e.g. 500mV/div
613 * represents 5V peak-to-peak where 0 = -2.5V and 255 = +2.5V.
614 */
615 ((float *)analog.data)[i] = ch_bit[ch] * *(buf + i * 2 + ch) - ch_center[ch];
616 }
617
618 sr_session_send(sdi, &packet);
619 g_slist_free(analog.meaning->channels);
620
621 channels = channels->next;
622 }
623 g_free(analog.data);
624}
625
626static void send_data(struct sr_dev_inst *sdi, struct libusb_transfer *buf[], uint64_t samples)
627{
628 int i = 0;
629 uint64_t send = 0;
630 uint32_t chunk;
631
632 while (send < samples) {
633 chunk = MIN(samples - send, (uint64_t)(buf[i]->actual_length / NUM_CHANNELS));
634 send += chunk;
635 send_chunk(sdi, buf[i]->buffer, chunk);
636
637 /*
638 * Everything in this transfer was either copied to the buffer
639 * or sent to the session bus.
640 */
641 g_free(buf[i]->buffer);
642 libusb_free_transfer(buf[i]);
643 i++;
644 }
645}
646
647/*
648 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
649 * Only channel data comes in asynchronously, and all transfers for this are
650 * queued up beforehand, so this just needs to chuck the incoming data onto
651 * the libsigrok session bus.
652 */
653static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
654{
655 struct sr_dev_inst *sdi;
656 struct dev_context *devc;
657
658 sdi = transfer->user_data;
659 devc = sdi->priv;
660
661 if (devc->dev_state == FLUSH) {
662 g_free(transfer->buffer);
663 libusb_free_transfer(transfer);
664 devc->dev_state = CAPTURE;
665 devc->aq_started = g_get_monotonic_time();
666 read_channel(sdi, data_amount(sdi));
667 return;
668 }
669
670 if (devc->dev_state != CAPTURE)
671 return;
672
673 if (!devc->sample_buf) {
674 devc->sample_buf_size = 10;
675 devc->sample_buf = g_try_malloc(devc->sample_buf_size * sizeof(transfer));
676 devc->sample_buf_write = 0;
677 }
678
679 if (devc->sample_buf_write >= devc->sample_buf_size) {
680 devc->sample_buf_size += 10;
681 devc->sample_buf = g_try_realloc(devc->sample_buf,
682 devc->sample_buf_size * sizeof(transfer));
683 if (!devc->sample_buf) {
684 sr_err("Sample buffer malloc failed.");
685 devc->dev_state = STOPPING;
686 return;
687 }
688 }
689
690 devc->sample_buf[devc->sample_buf_write++] = transfer;
691 devc->samp_received += transfer->actual_length / NUM_CHANNELS;
692
693 sr_spew("receive_transfer(): calculated samplerate == %" PRIu64 "ks/s",
694 (uint64_t)(transfer->actual_length * 1000 /
695 (g_get_monotonic_time() - devc->read_start_ts + 1) /
696 NUM_CHANNELS));
697
698 sr_spew("receive_transfer(): status %s received %d bytes.",
699 libusb_error_name(transfer->status), transfer->actual_length);
700
701 if (transfer->actual_length == 0)
702 /* Nothing to send to the bus. */
703 return;
704
705 if (devc->limit_samples && devc->samp_received >= devc->limit_samples) {
706 sr_info("Requested number of samples reached, stopping. %"
707 PRIu64 " <= %" PRIu64, devc->limit_samples,
708 devc->samp_received);
709 send_data(sdi, devc->sample_buf, devc->limit_samples);
710 sdi->driver->dev_acquisition_stop(sdi);
711 } else if (devc->limit_msec && (g_get_monotonic_time() -
712 devc->aq_started) / 1000 >= devc->limit_msec) {
713 sr_info("Requested time limit reached, stopping. %d <= %d",
714 (uint32_t)devc->limit_msec,
715 (uint32_t)(g_get_monotonic_time() - devc->aq_started) / 1000);
716 send_data(sdi, devc->sample_buf, devc->samp_received);
717 g_free(devc->sample_buf);
718 devc->sample_buf = NULL;
719 sdi->driver->dev_acquisition_stop(sdi);
720 } else {
721 read_channel(sdi, data_amount(sdi));
722 }
723}
724
725static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount)
726{
727 int ret;
728 struct dev_context *devc;
729
730 devc = sdi->priv;
731
732 amount = MIN(amount, MAX_PACKET_SIZE);
733 ret = hantek_6xxx_get_channeldata(sdi, receive_transfer, amount);
734 devc->read_start_ts = g_get_monotonic_time();
735 devc->read_data_amount = amount;
736
737 return ret;
738}
739
740static int handle_event(int fd, int revents, void *cb_data)
741{
742 const struct sr_dev_inst *sdi;
743 struct timeval tv;
744 struct sr_dev_driver *di;
745 struct dev_context *devc;
746 struct drv_context *drvc;
747
748 (void)fd;
749 (void)revents;
750
751 sdi = cb_data;
752 di = sdi->driver;
753 drvc = di->context;
754 devc = sdi->priv;
755
756 /* Always handle pending libusb events. */
757 tv.tv_sec = tv.tv_usec = 0;
758 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
759
760 if (devc->dev_state == STOPPING) {
761 /* We've been told to wind up the acquisition. */
762 sr_dbg("Stopping acquisition.");
763
764 hantek_6xxx_stop_data_collecting(sdi);
765 /*
766 * TODO: Doesn't really cancel pending transfers so they might
767 * come in after SR_DF_END is sent.
768 */
769 usb_source_remove(sdi->session, drvc->sr_ctx);
770
771 std_session_send_df_end(sdi);
772
773 devc->dev_state = IDLE;
774
775 return TRUE;
776 }
777
778 return TRUE;
779}
780
781static int dev_acquisition_start(const struct sr_dev_inst *sdi)
782{
783 struct dev_context *devc;
784 struct sr_dev_driver *di = sdi->driver;
785 struct drv_context *drvc = di->context;
786
787 if (sdi->status != SR_ST_ACTIVE)
788 return SR_ERR_DEV_CLOSED;
789
790 devc = sdi->priv;
791
792 if (configure_channels(sdi) != SR_OK) {
793 sr_err("Failed to configure channels.");
794 return SR_ERR;
795 }
796
797 if (hantek_6xxx_init(sdi) != SR_OK)
798 return SR_ERR;
799
800 std_session_send_df_header(sdi);
801
802 devc->samp_received = 0;
803 devc->dev_state = FLUSH;
804
805 usb_source_add(sdi->session, drvc->sr_ctx, TICK,
806 handle_event, (void *)sdi);
807
808 hantek_6xxx_start_data_collecting(sdi);
809
810 read_channel(sdi, FLUSH_PACKET_SIZE);
811
812 return SR_OK;
813}
814
815static int dev_acquisition_stop(struct sr_dev_inst *sdi)
816{
817 struct dev_context *devc;
818
819 if (sdi->status != SR_ST_ACTIVE)
820 return SR_ERR;
821
822 devc = sdi->priv;
823 devc->dev_state = STOPPING;
824
825 g_free(devc->sample_buf); devc->sample_buf = NULL;
826
827 return SR_OK;
828}
829
830static struct sr_dev_driver hantek_6xxx_driver_info = {
831 .name = "hantek-6xxx",
832 .longname = "Hantek 6xxx",
833 .api_version = 1,
834 .init = std_init,
835 .cleanup = std_cleanup,
836 .scan = scan,
837 .dev_list = std_dev_list,
838 .dev_clear = dev_clear,
839 .config_get = config_get,
840 .config_set = config_set,
841 .config_list = config_list,
842 .dev_open = dev_open,
843 .dev_close = dev_close,
844 .dev_acquisition_start = dev_acquisition_start,
845 .dev_acquisition_stop = dev_acquisition_stop,
846 .context = NULL,
847};
848SR_REGISTER_DEV_DRIVER(hantek_6xxx_driver_info);
Hardware access and backend lib