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3b533202 BV |
1 | /* |
2 | * This file is part of the sigrok 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 <stdio.h> | |
21 | #include <stdint.h> | |
22 | #include <stdlib.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
27 | #include <string.h> | |
28 | #include <sys/time.h> | |
29 | #include <inttypes.h> | |
30 | #include <arpa/inet.h> | |
31 | #include <glib.h> | |
32 | #include <libusb.h> | |
33 | #include "sigrok.h" | |
34 | #include "sigrok-internal.h" | |
35 | #include "config.h" | |
36 | #include "dso.h" | |
37 | ||
38 | ||
39 | /* Max time in ms before we want to check on events */ | |
40 | #define TICK 1 | |
41 | ||
42 | static int capabilities[] = { | |
43 | SR_HWCAP_OSCILLOSCOPE, | |
ae88b97b | 44 | SR_HWCAP_LIMIT_SAMPLES, |
3b533202 BV |
45 | SR_HWCAP_CONTINUOUS, |
46 | 0, | |
47 | }; | |
48 | ||
49 | static const char *probe_names[] = { | |
50 | "CH1", | |
51 | "CH2", | |
52 | NULL, | |
53 | }; | |
54 | ||
55 | static struct dso_profile dev_profiles[] = { | |
56 | { 0x04b4, 0x2090, | |
57 | 0x04b5, 0x2090, | |
58 | "Hantek", "DSO-2090", | |
59 | NULL, 2, | |
60 | FIRMWARE_DIR "/hantek-dso-2090.fw" }, | |
61 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 } | |
62 | }; | |
63 | ||
64 | ||
65 | SR_PRIV libusb_context *usb_context = NULL; | |
66 | SR_PRIV GSList *dev_insts = NULL; | |
67 | ||
68 | ||
69 | static struct sr_dev_inst *dso_dev_new(int index, struct dso_profile *prof) | |
70 | { | |
71 | struct sr_dev_inst *sdi; | |
72 | struct context *ctx; | |
73 | ||
74 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
75 | prof->vendor, prof->model, prof->model_version); | |
76 | if (!sdi) | |
77 | return NULL; | |
78 | ||
79 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
80 | sr_err("hantek-dso: ctx malloc failed"); | |
81 | return NULL; | |
82 | } | |
83 | ctx->profile = prof; | |
84 | ctx->dev_state = IDLE; | |
85 | ctx->timebase = DEFAULT_TIMEBASE; | |
86 | ctx->ch1_enabled = TRUE; | |
87 | ctx->ch2_enabled = TRUE; | |
88 | ctx->voltage_ch1 = DEFAULT_VOLTAGE; | |
89 | ctx->voltage_ch2 = DEFAULT_VOLTAGE; | |
90 | ctx->coupling_ch1 = DEFAULT_COUPLING; | |
91 | ctx->coupling_ch2 = DEFAULT_COUPLING; | |
92 | ctx->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
93 | ctx->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
94 | ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
3b533202 BV |
95 | ctx->framesize = DEFAULT_FRAMESIZE; |
96 | ctx->triggerslope = SLOPE_POSITIVE; | |
97 | ctx->triggersource = DEFAULT_TRIGGER_SOURCE; | |
98 | ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
99 | sdi->priv = ctx; | |
100 | dev_insts = g_slist_append(dev_insts, sdi); | |
101 | ||
102 | return sdi; | |
103 | } | |
104 | ||
105 | static int configure_probes(struct context *ctx, GSList *probes) | |
106 | { | |
107 | struct sr_probe *probe; | |
108 | GSList *l; | |
109 | ||
6e71ef3b | 110 | ctx->ch1_enabled = ctx->ch2_enabled = FALSE; |
3b533202 BV |
111 | for (l = probes; l; l = l->next) { |
112 | probe = (struct sr_probe *)l->data; | |
6e71ef3b | 113 | if (probe->index == 1) |
3b533202 | 114 | ctx->ch1_enabled = probe->enabled; |
6e71ef3b | 115 | else if (probe->index == 2) |
3b533202 BV |
116 | ctx->ch2_enabled = probe->enabled; |
117 | } | |
118 | ||
119 | return SR_OK; | |
120 | } | |
121 | ||
122 | static int hw_init(const char *devinfo) | |
123 | { | |
124 | struct sr_dev_inst *sdi; | |
125 | struct libusb_device_descriptor des; | |
126 | struct dso_profile *prof; | |
127 | struct context *ctx; | |
128 | libusb_device **devlist; | |
129 | int err, devcnt, i, j; | |
130 | ||
131 | /* Avoid compiler warnings. */ | |
132 | (void)devinfo; | |
133 | ||
134 | if (libusb_init(&usb_context) != 0) { | |
135 | sr_err("hantek-dso: Failed to initialize USB."); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | /* Find all Hantek DSO devices and upload firmware to all of them. */ | |
140 | devcnt = 0; | |
141 | libusb_get_device_list(usb_context, &devlist); | |
142 | for (i = 0; devlist[i]; i++) { | |
143 | if ((err = libusb_get_device_descriptor(devlist[i], &des))) { | |
144 | sr_err("hantek-dso: failed to get device descriptor: %d", err); | |
145 | continue; | |
146 | } | |
147 | ||
148 | prof = NULL; | |
149 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
150 | if (des.idVendor == dev_profiles[j].orig_vid | |
151 | && des.idProduct == dev_profiles[j].orig_pid) { | |
152 | /* Device matches the pre-firmware profile. */ | |
153 | prof = &dev_profiles[j]; | |
154 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
155 | sdi = dso_dev_new(devcnt, prof); | |
156 | ctx = sdi->priv; | |
157 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
158 | prof->firmware) == SR_OK) | |
159 | /* Remember when the firmware on this device was updated */ | |
160 | g_get_current_time(&ctx->fw_updated); | |
161 | else | |
162 | sr_err("hantek-dso: firmware upload failed for " | |
163 | "device %d", devcnt); | |
164 | /* Dummy USB address of 0xff will get overwritten later. */ | |
165 | ctx->usb = sr_usb_dev_inst_new( | |
166 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
167 | devcnt++; | |
168 | break; | |
169 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
170 | && des.idProduct == dev_profiles[j].fw_pid) { | |
171 | /* Device matches the post-firmware profile. */ | |
172 | prof = &dev_profiles[j]; | |
173 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
174 | sdi = dso_dev_new(devcnt, prof); | |
175 | sdi->status = SR_ST_INACTIVE; | |
176 | ctx = sdi->priv; | |
177 | ctx->usb = sr_usb_dev_inst_new( | |
178 | libusb_get_bus_number(devlist[i]), | |
179 | libusb_get_device_address(devlist[i]), NULL); | |
180 | devcnt++; | |
181 | break; | |
182 | } | |
183 | } | |
184 | if (!prof) | |
185 | /* not a supported VID/PID */ | |
186 | continue; | |
187 | } | |
188 | libusb_free_device_list(devlist, 1); | |
189 | ||
190 | return devcnt; | |
191 | } | |
192 | ||
193 | static int hw_dev_open(int dev_index) | |
194 | { | |
195 | GTimeVal cur_time; | |
196 | struct sr_dev_inst *sdi; | |
197 | struct context *ctx; | |
198 | int timediff, err; | |
199 | ||
200 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
201 | return SR_ERR_ARG; | |
202 | ctx = sdi->priv; | |
203 | ||
204 | /* | |
205 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms | |
206 | * for the FX2 to renumerate | |
207 | */ | |
208 | err = 0; | |
209 | if (GTV_TO_MSEC(ctx->fw_updated) > 0) { | |
210 | sr_info("hantek-dso: waiting for device to reset"); | |
211 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
212 | g_usleep(300 * 1000); | |
213 | timediff = 0; | |
214 | while (timediff < MAX_RENUM_DELAY) { | |
215 | if ((err = dso_open(dev_index)) == SR_OK) | |
216 | break; | |
217 | g_usleep(100 * 1000); | |
218 | g_get_current_time(&cur_time); | |
219 | timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(ctx->fw_updated); | |
220 | } | |
221 | sr_info("hantek-dso: device came back after %d ms", timediff); | |
222 | } else { | |
223 | err = dso_open(dev_index); | |
224 | } | |
225 | ||
226 | if (err != SR_OK) { | |
227 | sr_err("hantek-dso: unable to open device"); | |
228 | return SR_ERR; | |
229 | } | |
230 | ||
231 | err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
232 | if (err != 0) { | |
233 | sr_err("hantek-dso: Unable to claim interface: %d", err); | |
234 | return SR_ERR; | |
235 | } | |
236 | ||
237 | return SR_OK; | |
238 | } | |
239 | ||
240 | static int hw_dev_close(int dev_index) | |
241 | { | |
242 | struct sr_dev_inst *sdi; | |
243 | ||
244 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
245 | return SR_ERR_ARG; | |
246 | ||
247 | dso_close(sdi); | |
248 | ||
249 | return SR_OK; | |
250 | } | |
251 | ||
252 | static int hw_cleanup(void) | |
253 | { | |
254 | GSList *l; | |
255 | struct sr_dev_inst *sdi; | |
256 | struct context *ctx; | |
257 | ||
258 | /* Properly close and free all devices. */ | |
259 | for (l = dev_insts; l; l = l->next) { | |
260 | if (!(sdi = l->data)) { | |
261 | /* Log error, but continue cleaning up the rest. */ | |
262 | sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__); | |
263 | continue; | |
264 | } | |
265 | if (!(ctx = sdi->priv)) { | |
266 | /* Log error, but continue cleaning up the rest. */ | |
267 | sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__); | |
268 | continue; | |
269 | } | |
270 | dso_close(sdi); | |
271 | sr_usb_dev_inst_free(ctx->usb); | |
272 | sr_dev_inst_free(sdi); | |
273 | } | |
274 | ||
275 | g_slist_free(dev_insts); | |
276 | dev_insts = NULL; | |
277 | ||
278 | if (usb_context) | |
279 | libusb_exit(usb_context); | |
280 | usb_context = NULL; | |
281 | ||
282 | return SR_OK; | |
283 | } | |
284 | ||
285 | static void *hw_get_device_info(int dev_index, int dev_info_id) | |
286 | { | |
287 | struct sr_dev_inst *sdi; | |
288 | struct context *ctx; | |
289 | void *info; | |
290 | uint64_t tmp; | |
291 | ||
292 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
293 | return NULL; | |
294 | ctx = sdi->priv; | |
295 | ||
296 | info = NULL; | |
297 | switch (dev_info_id) { | |
298 | case SR_DI_INST: | |
299 | info = sdi; | |
300 | break; | |
301 | case SR_DI_NUM_PROBES: | |
302 | info = GINT_TO_POINTER(ctx->profile->num_probes); | |
303 | break; | |
304 | case SR_DI_PROBE_NAMES: | |
305 | info = probe_names; | |
306 | break; | |
307 | /* TODO remove this */ | |
308 | case SR_DI_CUR_SAMPLERATE: | |
309 | info = &tmp; | |
310 | break; | |
311 | } | |
312 | ||
313 | return info; | |
314 | } | |
315 | ||
316 | static int hw_get_status(int device_index) | |
317 | { | |
318 | struct sr_dev_inst *sdi; | |
319 | ||
320 | if (!(sdi = sr_dev_inst_get(dev_insts, device_index))) | |
321 | return SR_ST_NOT_FOUND; | |
322 | ||
323 | return sdi->status; | |
324 | } | |
325 | ||
326 | static int *hwcap_get_all(void) | |
327 | { | |
328 | ||
329 | return capabilities; | |
330 | } | |
331 | ||
332 | static int hw_dev_config_set(int dev_index, int hwcap, void *value) | |
333 | { | |
334 | struct sr_dev_inst *sdi; | |
335 | struct context *ctx; | |
336 | int tmp, ret; | |
337 | ||
338 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) | |
339 | return SR_ERR; | |
340 | ||
341 | if (sdi->status != SR_ST_ACTIVE) | |
342 | return SR_ERR; | |
343 | ||
344 | ctx = sdi->priv; | |
345 | switch (hwcap) { | |
ae88b97b BV |
346 | case SR_HWCAP_LIMIT_FRAMES: |
347 | ctx->limit_frames = *(uint64_t *)value; | |
348 | break; | |
3b533202 BV |
349 | case SR_HWCAP_PROBECONFIG: |
350 | ret = configure_probes(ctx, (GSList *) value); | |
351 | break; | |
352 | case SR_HWCAP_TRIGGERSLOPE: | |
353 | tmp = *(int *)value; | |
354 | if (tmp != SLOPE_NEGATIVE && tmp != SLOPE_POSITIVE) | |
355 | ret = SR_ERR_ARG; | |
356 | ctx->triggerslope = tmp; | |
357 | default: | |
358 | ret = SR_ERR_ARG; | |
359 | } | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | /* Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
365 | * Only channel data comes in asynchronously, and all transfers for this are | |
366 | * queued up beforehand, so this just needs so chuck the incoming data onto | |
367 | * the libsigrok session bus. | |
368 | */ | |
369 | static void receive_transfer(struct libusb_transfer *transfer) | |
370 | { | |
371 | struct sr_datafeed_packet packet; | |
372 | struct sr_datafeed_analog analog; | |
373 | struct context *ctx; | |
374 | float ch1, ch2; | |
6e71ef3b | 375 | int num_probes, data_offset, i; |
3b533202 BV |
376 | |
377 | ctx = transfer->user_data; | |
378 | sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes", | |
379 | transfer->status, transfer->actual_length); | |
380 | ||
381 | if (transfer->actual_length == 0) | |
382 | /* Nothing to send to the bus. */ | |
383 | return; | |
384 | ||
385 | ctx->current_transfer += transfer->actual_length; | |
386 | sr_dbg("hantek-dso: got %d of %d in frame", ctx->current_transfer, ctx->framesize * 2); | |
3b533202 | 387 | |
6e71ef3b | 388 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; |
3b533202 BV |
389 | packet.type = SR_DF_ANALOG; |
390 | packet.payload = &analog; | |
6e71ef3b | 391 | /* TODO: support for 5xxx series 9-bit samples */ |
3b533202 | 392 | analog.num_samples = transfer->actual_length / 2; |
6e71ef3b BV |
393 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); |
394 | data_offset = 0; | |
3b533202 | 395 | for (i = 0; i < analog.num_samples; i++) { |
6e71ef3b BV |
396 | /* The device always sends data for both channels. If a channel |
397 | * is disabled, it contains a copy of the enabled channel's | |
398 | * data. However, we only send the requested channels to the bus. | |
399 | */ | |
3b533202 | 400 | /* TODO: support for 5xxx series 9-bit samples */ |
6e71ef3b BV |
401 | if (ctx->ch1_enabled) { |
402 | ch1 = (*(transfer->buffer + i * 2 + 1) / 255.0); | |
403 | analog.data[data_offset++] = ch1; | |
404 | } | |
405 | if (ctx->ch2_enabled) { | |
406 | ch2 = (*(transfer->buffer + i * 2) / 255.0); | |
407 | analog.data[data_offset++] = ch2; | |
408 | } | |
3b533202 BV |
409 | } |
410 | g_free(transfer->buffer); | |
411 | libusb_free_transfer(transfer); | |
3b533202 BV |
412 | sr_session_send(ctx->cb_data, &packet); |
413 | ||
ae88b97b BV |
414 | if (ctx->current_transfer >= ctx->framesize * 2) { |
415 | /* That's the last chunk in this frame. */ | |
416 | packet.type = SR_DF_FRAME_END; | |
417 | sr_session_send(ctx->cb_data, &packet); | |
418 | ||
419 | if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) { | |
420 | /* Terminate session */ | |
6e71ef3b | 421 | /* TODO: don't leave pending USB transfers hanging */ |
ae88b97b BV |
422 | packet.type = SR_DF_END; |
423 | sr_session_send(ctx->cb_data, &packet); | |
424 | } else { | |
425 | ctx->current_transfer = 0; | |
426 | ctx->dev_state = NEW_CAPTURE; | |
427 | } | |
428 | } | |
429 | ||
3b533202 BV |
430 | } |
431 | ||
432 | static int handle_event(int fd, int revents, void *cb_data) | |
433 | { | |
ae88b97b | 434 | struct sr_datafeed_packet packet; |
3b533202 BV |
435 | struct timeval tv; |
436 | struct context *ctx; | |
437 | int capturestate; | |
438 | ||
439 | /* Avoid compiler warnings. */ | |
440 | (void)fd; | |
441 | (void)revents; | |
442 | ||
443 | /* Always handle pending libusb events. */ | |
444 | tv.tv_sec = tv.tv_usec = 0; | |
445 | libusb_handle_events_timeout(usb_context, &tv); | |
446 | ||
447 | ctx = cb_data; | |
448 | /* TODO: ugh */ | |
449 | if (ctx->dev_state == NEW_CAPTURE) { | |
450 | if (dso_capture_start(ctx) != SR_OK) | |
451 | return TRUE; | |
452 | if (dso_enable_trigger(ctx) != SR_OK) | |
453 | return TRUE; | |
454 | if (dso_force_trigger(ctx) != SR_OK) | |
455 | return TRUE; | |
456 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
457 | ctx->dev_state = CAPTURE; | |
458 | return TRUE; | |
459 | } | |
460 | if (ctx->dev_state != CAPTURE) | |
461 | return TRUE; | |
462 | ||
463 | if ((capturestate = dso_get_capturestate(ctx)) == CAPTURE_UNKNOWN) { | |
464 | /* Generated by the function, not the hardware. */ | |
465 | return TRUE; | |
466 | } | |
467 | ||
468 | sr_dbg("hantek-dso: capturestate %d", capturestate); | |
469 | switch (capturestate) { | |
470 | case CAPTURE_EMPTY: | |
471 | if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
472 | ctx->capture_empty_count = 0; | |
473 | if (dso_capture_start(ctx) != SR_OK) | |
474 | break; | |
475 | if (dso_enable_trigger(ctx) != SR_OK) | |
476 | break; | |
477 | if (dso_force_trigger(ctx) != SR_OK) | |
478 | break; | |
479 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
480 | } | |
481 | break; | |
482 | case CAPTURE_FILLING: | |
483 | /* no data yet */ | |
484 | break; | |
485 | case CAPTURE_READY_8BIT: | |
486 | /* Tell the scope to send us the first frame. */ | |
487 | if (dso_get_channeldata(ctx, receive_transfer) != SR_OK) | |
488 | break; | |
ae88b97b BV |
489 | |
490 | /* Don't hit the state machine again until we're done fetching | |
491 | * the data we just told the scope to send. | |
492 | */ | |
3b533202 | 493 | ctx->dev_state = FETCH_DATA; |
ae88b97b BV |
494 | |
495 | /* Tell the frontend a new frame is on the way. */ | |
496 | packet.type = SR_DF_FRAME_BEGIN; | |
497 | sr_session_send(cb_data, &packet); | |
3b533202 BV |
498 | break; |
499 | case CAPTURE_READY_9BIT: | |
500 | /* TODO */ | |
501 | sr_err("not yet supported"); | |
502 | break; | |
503 | case CAPTURE_TIMEOUT: | |
504 | /* Doesn't matter, we'll try again next time. */ | |
505 | break; | |
506 | default: | |
507 | sr_dbg("unknown capture state"); | |
508 | } | |
509 | ||
510 | return TRUE; | |
511 | } | |
512 | ||
513 | static int hw_start_acquisition(int device_index, void *cb_data) | |
514 | { | |
515 | const struct libusb_pollfd **lupfd; | |
516 | struct sr_datafeed_packet packet; | |
517 | struct sr_datafeed_header header; | |
518 | struct sr_datafeed_meta_analog meta; | |
519 | struct sr_dev_inst *sdi; | |
520 | struct context *ctx; | |
521 | int i; | |
522 | ||
523 | if (!(sdi = sr_dev_inst_get(dev_insts, device_index))) | |
524 | return SR_ERR; | |
525 | ||
526 | if (sdi->status != SR_ST_ACTIVE) | |
527 | return SR_ERR; | |
528 | ||
529 | ctx = sdi->priv; | |
530 | ctx->cb_data = cb_data; | |
531 | ||
532 | if (dso_init(ctx) != SR_OK) | |
533 | return SR_ERR; | |
534 | ||
535 | if (dso_capture_start(ctx) != SR_OK) | |
536 | return SR_ERR; | |
537 | ||
538 | ctx->dev_state = CAPTURE; | |
539 | lupfd = libusb_get_pollfds(usb_context); | |
540 | for (i = 0; lupfd[i]; i++) | |
541 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event, | |
542 | ctx); | |
543 | free(lupfd); | |
544 | ||
545 | /* Send header packet to the session bus. */ | |
546 | packet.type = SR_DF_HEADER; | |
547 | packet.payload = (unsigned char *)&header; | |
548 | header.feed_version = 1; | |
549 | gettimeofday(&header.starttime, NULL); | |
550 | sr_session_send(cb_data, &packet); | |
551 | ||
552 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
553 | packet.type = SR_DF_META_ANALOG; | |
554 | packet.payload = &meta; | |
555 | meta.num_probes = ctx->profile->num_probes; | |
556 | sr_session_send(cb_data, &packet); | |
557 | ||
558 | return SR_OK; | |
559 | } | |
560 | ||
561 | /* TODO: doesn't really cancel pending transfers so they might come in after | |
562 | * SR_DF_END is sent. | |
563 | */ | |
564 | static int hw_stop_acquisition(int device_index, gpointer session_device_id) | |
565 | { | |
566 | struct sr_datafeed_packet packet; | |
567 | struct sr_dev_inst *sdi; | |
568 | struct context *ctx; | |
569 | ||
570 | if (!(sdi = sr_dev_inst_get(dev_insts, device_index))) | |
571 | return SR_ERR; | |
572 | ||
573 | if (sdi->status != SR_ST_ACTIVE) | |
574 | return SR_ERR; | |
575 | ||
576 | ctx = sdi->priv; | |
577 | ctx->dev_state = IDLE; | |
578 | ||
579 | packet.type = SR_DF_END; | |
580 | sr_session_send(session_device_id, &packet); | |
581 | ||
582 | return SR_OK; | |
583 | } | |
584 | ||
585 | SR_PRIV struct sr_dev_driver hantek_dso_plugin_info = { | |
586 | .name = "hantek-dso", | |
587 | .longname = "Hantek DSO", | |
588 | .api_version = 1, | |
589 | .init = hw_init, | |
590 | .cleanup = hw_cleanup, | |
591 | .dev_open = hw_dev_open, | |
592 | .dev_close = hw_dev_close, | |
593 | .dev_info_get = hw_get_device_info, | |
594 | .dev_status_get = hw_get_status, | |
595 | .hwcap_get_all = hwcap_get_all, | |
596 | .dev_config_set = hw_dev_config_set, | |
597 | .dev_acquisition_start = hw_start_acquisition, | |
598 | .dev_acquisition_stop = hw_stop_acquisition, | |
599 | }; |