2 * This file is part of the libsigrok project.
4 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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.
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.
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/>.
23 #include <sys/types.h>
32 #include "libsigrok.h"
33 #include "libsigrok-internal.h"
36 /* Max time in ms before we want to check on USB events */
37 /* TODO tune this properly */
40 #define NUM_TIMEBASE 10
43 static const int32_t scanopts[] = {
47 static const int32_t devopts[] = {
53 SR_CONF_TRIGGER_SOURCE,
54 SR_CONF_TRIGGER_SLOPE,
55 SR_CONF_HORIZ_TRIGGERPOS,
63 static const char *probe_names[] = {
68 static const uint64_t buffersizes_32k[] = {
71 static const uint64_t buffersizes_512k[] = {
74 static const uint64_t buffersizes_14k[] = {
78 static const struct dso_profile dev_profiles[] = {
79 { 0x04b4, 0x2090, 0x04b5, 0x2090,
82 FIRMWARE_DIR "/hantek-dso-2090.fw" },
83 { 0x04b4, 0x2150, 0x04b5, 0x2150,
86 FIRMWARE_DIR "/hantek-dso-2150.fw" },
87 { 0x04b4, 0x2250, 0x04b5, 0x2250,
90 FIRMWARE_DIR "/hantek-dso-2250.fw" },
91 { 0x04b4, 0x5200, 0x04b5, 0x5200,
94 FIRMWARE_DIR "/hantek-dso-5200.fw" },
95 { 0x04b4, 0x520a, 0x04b5, 0x520a,
96 "Hantek", "DSO-5200A",
98 FIRMWARE_DIR "/hantek-dso-5200A.fw" },
99 { 0, 0, 0, 0, 0, 0, 0, 0 },
102 static const uint64_t timebases[][2] = {
122 static const uint64_t vdivs[][2] = {
136 static const char *trigger_sources[] = {
143 static const char *filter_targets[] = {
146 /* TODO: "TRIGGER", */
149 static const char *coupling[] = {
155 SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
156 static struct sr_dev_driver *di = &hantek_dso_driver_info;
158 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
160 static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof)
162 struct sr_dev_inst *sdi;
163 struct sr_probe *probe;
164 struct drv_context *drvc;
165 struct dev_context *devc;
168 sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING,
169 prof->vendor, prof->model, NULL);
175 * Add only the real probes -- EXT isn't a source of data, only
176 * a trigger source internal to the device.
178 for (i = 0; probe_names[i]; i++) {
179 if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
182 sdi->probes = g_slist_append(sdi->probes, probe);
185 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
186 sr_err("Device context malloc failed.");
190 devc->profile = prof;
191 devc->dev_state = IDLE;
192 devc->timebase = DEFAULT_TIMEBASE;
193 devc->ch1_enabled = TRUE;
194 devc->ch2_enabled = TRUE;
195 devc->voltage_ch1 = DEFAULT_VOLTAGE;
196 devc->voltage_ch2 = DEFAULT_VOLTAGE;
197 devc->coupling_ch1 = DEFAULT_COUPLING;
198 devc->coupling_ch2 = DEFAULT_COUPLING;
199 devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
200 devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
201 devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
202 devc->framesize = DEFAULT_FRAMESIZE;
203 devc->triggerslope = SLOPE_POSITIVE;
204 devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
205 devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
208 drvc->instances = g_slist_append(drvc->instances, sdi);
213 static int configure_probes(const struct sr_dev_inst *sdi)
215 struct dev_context *devc;
216 struct sr_probe *probe;
222 g_slist_free(devc->enabled_probes);
223 devc->ch1_enabled = devc->ch2_enabled = FALSE;
224 for (l = sdi->probes, p = 0; l; l = l->next, p++) {
227 devc->ch1_enabled = probe->enabled;
229 devc->ch2_enabled = probe->enabled;
231 devc->enabled_probes = g_slist_append(devc->enabled_probes, probe);
237 static void clear_dev_context(void *priv)
239 struct dev_context *devc;
242 g_free(devc->triggersource);
243 g_slist_free(devc->enabled_probes);
247 static int clear_instances(void)
249 return std_dev_clear(di, clear_dev_context);
252 static int hw_init(struct sr_context *sr_ctx)
254 return std_hw_init(sr_ctx, di, LOG_PREFIX);
257 static GSList *hw_scan(GSList *options)
259 struct drv_context *drvc;
260 struct dev_context *devc;
261 struct sr_dev_inst *sdi;
262 struct sr_usb_dev_inst *usb;
263 struct sr_config *src;
264 const struct dso_profile *prof;
265 GSList *l, *devices, *conn_devices;
266 struct libusb_device_descriptor des;
267 libusb_device **devlist;
268 int devcnt, ret, i, j;
277 for (l = options; l; l = l->next) {
279 if (src->key == SR_CONF_CONN) {
280 conn = g_variant_get_string(src->data, NULL);
285 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
289 /* Find all Hantek DSO devices and upload firmware to all of them. */
290 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
291 for (i = 0; devlist[i]; i++) {
294 for (l = conn_devices; l; l = l->next) {
296 if (usb->bus == libusb_get_bus_number(devlist[i])
297 && usb->address == libusb_get_device_address(devlist[i]))
301 /* This device matched none of the ones that
302 * matched the conn specification. */
306 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
307 sr_err("Failed to get device descriptor: %s.",
308 libusb_error_name(ret));
313 for (j = 0; dev_profiles[j].orig_vid; j++) {
314 if (des.idVendor == dev_profiles[j].orig_vid
315 && des.idProduct == dev_profiles[j].orig_pid) {
316 /* Device matches the pre-firmware profile. */
317 prof = &dev_profiles[j];
318 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
319 sdi = dso_dev_new(devcnt, prof);
320 devices = g_slist_append(devices, sdi);
322 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
323 prof->firmware) == SR_OK)
324 /* Remember when the firmware on this device was updated */
325 devc->fw_updated = g_get_monotonic_time();
327 sr_err("Firmware upload failed for "
328 "device %d.", devcnt);
329 /* Dummy USB address of 0xff will get overwritten later. */
330 sdi->conn = sr_usb_dev_inst_new(
331 libusb_get_bus_number(devlist[i]), 0xff, NULL);
334 } else if (des.idVendor == dev_profiles[j].fw_vid
335 && des.idProduct == dev_profiles[j].fw_pid) {
336 /* Device matches the post-firmware profile. */
337 prof = &dev_profiles[j];
338 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
339 sdi = dso_dev_new(devcnt, prof);
340 sdi->status = SR_ST_INACTIVE;
341 devices = g_slist_append(devices, sdi);
343 sdi->inst_type = SR_INST_USB;
344 sdi->conn = sr_usb_dev_inst_new(
345 libusb_get_bus_number(devlist[i]),
346 libusb_get_device_address(devlist[i]), NULL);
352 /* not a supported VID/PID */
355 libusb_free_device_list(devlist, 1);
360 static GSList *hw_dev_list(void)
362 return ((struct drv_context *)(di->priv))->instances;
365 static int hw_dev_open(struct sr_dev_inst *sdi)
367 struct dev_context *devc;
368 struct sr_usb_dev_inst *usb;
369 int64_t timediff_us, timediff_ms;
376 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
377 * for the FX2 to renumerate.
380 if (devc->fw_updated > 0) {
381 sr_info("Waiting for device to reset.");
382 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
383 g_usleep(300 * 1000);
385 while (timediff_ms < MAX_RENUM_DELAY_MS) {
386 if ((err = dso_open(sdi)) == SR_OK)
388 g_usleep(100 * 1000);
389 timediff_us = g_get_monotonic_time() - devc->fw_updated;
390 timediff_ms = timediff_us / 1000;
391 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
393 sr_info("Device came back after %d ms.", timediff_ms);
399 sr_err("Unable to open device.");
403 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
405 sr_err("Unable to claim interface: %s.",
406 libusb_error_name(err));
413 static int hw_dev_close(struct sr_dev_inst *sdi)
420 static int hw_cleanup(void)
422 struct drv_context *drvc;
424 if (!(drvc = di->priv))
432 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
434 struct sr_usb_dev_inst *usb;
439 if (!sdi || !sdi->conn)
442 if (usb->address == 255)
443 /* Device still needs to re-enumerate after firmware
444 * upload, so we don't know its (future) address. */
446 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
447 *data = g_variant_new_string(str);
449 case SR_CONF_NUM_TIMEBASE:
450 *data = g_variant_new_int32(NUM_TIMEBASE);
452 case SR_CONF_NUM_VDIV:
453 *data = g_variant_new_int32(NUM_VDIV);
462 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
464 struct dev_context *devc;
466 uint64_t tmp_u64, p, q;
472 if (sdi->status != SR_ST_ACTIVE)
473 return SR_ERR_DEV_CLOSED;
478 case SR_CONF_LIMIT_FRAMES:
479 devc->limit_frames = g_variant_get_uint64(data);
481 case SR_CONF_TRIGGER_SLOPE:
482 tmp_u64 = g_variant_get_uint64(data);
483 if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE)
485 devc->triggerslope = tmp_u64;
487 case SR_CONF_HORIZ_TRIGGERPOS:
488 tmp_double = g_variant_get_double(data);
489 if (tmp_double < 0.0 || tmp_double > 1.0) {
490 sr_err("Trigger position should be between 0.0 and 1.0.");
493 devc->triggerposition = tmp_double;
495 case SR_CONF_BUFFERSIZE:
496 tmp_u64 = g_variant_get_uint64(data);
497 for (i = 0; i < 2; i++) {
498 if (devc->profile->buffersizes[i] == tmp_u64) {
499 devc->framesize = tmp_u64;
506 case SR_CONF_TIMEBASE:
507 g_variant_get(data, "(tt)", &p, &q);
509 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
510 if (timebases[i][0] == p && timebases[i][1] == q) {
516 devc->timebase = tmp_int;
520 case SR_CONF_TRIGGER_SOURCE:
521 tmp_str = g_variant_get_string(data, NULL);
522 for (i = 0; trigger_sources[i]; i++) {
523 if (!strcmp(tmp_str, trigger_sources[i])) {
524 devc->triggersource = g_strdup(tmp_str);
528 if (trigger_sources[i] == 0)
532 tmp_str = g_variant_get_string(data, NULL);
533 devc->filter_ch1 = devc->filter_ch2 = devc->filter_trigger = 0;
534 targets = g_strsplit(tmp_str, ",", 0);
535 for (i = 0; targets[i]; i++) {
536 if (targets[i] == '\0')
537 /* Empty filter string can be used to clear them all. */
539 else if (!strcmp(targets[i], "CH1"))
540 devc->filter_ch1 = TRUE;
541 else if (!strcmp(targets[i], "CH2"))
542 devc->filter_ch2 = TRUE;
543 else if (!strcmp(targets[i], "TRIGGER"))
544 devc->filter_trigger = TRUE;
546 sr_err("Invalid filter target %s.", targets[i]);
553 /* TODO: Not supporting vdiv per channel yet. */
554 g_variant_get(data, "(tt)", &p, &q);
556 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
557 if (vdivs[i][0] == p && vdivs[i][1] == q) {
563 devc->voltage_ch1 = tmp_int;
564 devc->voltage_ch2 = tmp_int;
568 case SR_CONF_COUPLING:
569 tmp_str = g_variant_get_string(data, NULL);
570 /* TODO: Not supporting coupling per channel yet. */
571 for (i = 0; coupling[i]; i++) {
572 if (!strcmp(tmp_str, coupling[i])) {
573 devc->coupling_ch1 = i;
574 devc->coupling_ch2 = i;
578 if (coupling[i] == 0)
589 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
591 struct dev_context *devc;
592 GVariant *tuple, *rational[2];
603 case SR_CONF_SCAN_OPTIONS:
604 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
605 scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t));
607 case SR_CONF_DEVICE_OPTIONS:
608 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
609 devopts, ARRAY_SIZE(devopts), sizeof(int32_t));
611 case SR_CONF_BUFFERSIZE:
612 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
613 devc->profile->buffersizes, 2, sizeof(uint64_t));
615 case SR_CONF_COUPLING:
616 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
619 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
620 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
621 rational[0] = g_variant_new_uint64(vdivs[i][0]);
622 rational[1] = g_variant_new_uint64(vdivs[i][1]);
623 tuple = g_variant_new_tuple(rational, 2);
624 g_variant_builder_add_value(&gvb, tuple);
626 *data = g_variant_builder_end(&gvb);
629 *data = g_variant_new_strv(filter_targets,
630 ARRAY_SIZE(filter_targets));
632 case SR_CONF_TIMEBASE:
633 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
634 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
635 rational[0] = g_variant_new_uint64(timebases[i][0]);
636 rational[1] = g_variant_new_uint64(timebases[i][1]);
637 tuple = g_variant_new_tuple(rational, 2);
638 g_variant_builder_add_value(&gvb, tuple);
640 *data = g_variant_builder_end(&gvb);
642 case SR_CONF_TRIGGER_SOURCE:
643 *data = g_variant_new_strv(trigger_sources,
644 ARRAY_SIZE(trigger_sources));
653 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
656 struct sr_datafeed_packet packet;
657 struct sr_datafeed_analog analog;
658 struct dev_context *devc;
659 float ch1, ch2, range;
660 int num_probes, data_offset, i;
663 num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
664 packet.type = SR_DF_ANALOG;
665 packet.payload = &analog;
666 /* TODO: support for 5xxx series 9-bit samples */
667 analog.probes = devc->enabled_probes;
668 analog.num_samples = num_samples;
669 analog.mq = SR_MQ_VOLTAGE;
670 analog.unit = SR_UNIT_VOLT;
671 /* TODO: Check malloc return value. */
672 analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes);
674 for (i = 0; i < analog.num_samples; i++) {
676 * The device always sends data for both channels. If a channel
677 * is disabled, it contains a copy of the enabled channel's
678 * data. However, we only send the requested channels to
681 * Voltage values are encoded as a value 0-255 (0-512 on the
682 * DSO-5200*), where the value is a point in the range
683 * represented by the vdiv setting. There are 8 vertical divs,
684 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
687 /* TODO: Support for DSO-5xxx series 9-bit samples. */
688 if (devc->ch1_enabled) {
689 range = ((float)vdivs[devc->voltage_ch1][0] / vdivs[devc->voltage_ch1][1]) * 8;
690 ch1 = range / 255 * *(buf + i * 2 + 1);
691 /* Value is centered around 0V. */
693 analog.data[data_offset++] = ch1;
695 if (devc->ch2_enabled) {
696 range = ((float)vdivs[devc->voltage_ch2][0] / vdivs[devc->voltage_ch2][1]) * 8;
697 ch2 = range / 255 * *(buf + i * 2);
699 analog.data[data_offset++] = ch2;
702 sr_session_send(devc->cb_data, &packet);
706 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
707 * Only channel data comes in asynchronously, and all transfers for this are
708 * queued up beforehand, so this just needs to chuck the incoming data onto
709 * the libsigrok session bus.
711 static void receive_transfer(struct libusb_transfer *transfer)
713 struct sr_datafeed_packet packet;
714 struct sr_dev_inst *sdi;
715 struct dev_context *devc;
716 int num_samples, pre;
718 sdi = transfer->user_data;
720 sr_spew("receive_transfer(): status %d received %d bytes.",
721 transfer->status, transfer->actual_length);
723 if (transfer->actual_length == 0)
724 /* Nothing to send to the bus. */
727 num_samples = transfer->actual_length / 2;
729 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
730 devc->samp_received + num_samples, devc->framesize);
733 * The device always sends a full frame, but the beginning of the frame
734 * doesn't represent the trigger point. The offset at which the trigger
735 * happened came in with the capture state, so we need to start sending
736 * from there up the session bus. The samples in the frame buffer
737 * before that trigger point came after the end of the device's frame
738 * buffer was reached, and it wrapped around to overwrite up until the
741 if (devc->samp_received < devc->trigger_offset) {
742 /* Trigger point not yet reached. */
743 if (devc->samp_received + num_samples < devc->trigger_offset) {
744 /* The entire chunk is before the trigger point. */
745 memcpy(devc->framebuf + devc->samp_buffered * 2,
746 transfer->buffer, num_samples * 2);
747 devc->samp_buffered += num_samples;
750 * This chunk hits or overruns the trigger point.
751 * Store the part before the trigger fired, and
752 * send the rest up to the session bus.
754 pre = devc->trigger_offset - devc->samp_received;
755 memcpy(devc->framebuf + devc->samp_buffered * 2,
756 transfer->buffer, pre * 2);
757 devc->samp_buffered += pre;
759 /* The rest of this chunk starts with the trigger point. */
760 sr_dbg("Reached trigger point, %d samples buffered.",
761 devc->samp_buffered);
763 /* Avoid the corner case where the chunk ended at
764 * exactly the trigger point. */
765 if (num_samples > pre)
766 send_chunk(sdi, transfer->buffer + pre * 2,
770 /* Already past the trigger point, just send it all out. */
771 send_chunk(sdi, transfer->buffer,
775 devc->samp_received += num_samples;
777 /* Everything in this transfer was either copied to the buffer or
778 * sent to the session bus. */
779 g_free(transfer->buffer);
780 libusb_free_transfer(transfer);
782 if (devc->samp_received >= devc->framesize) {
783 /* That was the last chunk in this frame. Send the buffered
784 * pre-trigger samples out now, in one big chunk. */
785 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
786 devc->samp_buffered);
787 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
789 /* Mark the end of this frame. */
790 packet.type = SR_DF_FRAME_END;
791 sr_session_send(devc->cb_data, &packet);
793 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
794 /* Terminate session */
795 devc->dev_state = STOPPING;
797 devc->dev_state = NEW_CAPTURE;
802 static int handle_event(int fd, int revents, void *cb_data)
804 const struct sr_dev_inst *sdi;
805 struct sr_datafeed_packet packet;
807 struct dev_context *devc;
808 struct drv_context *drvc = di->priv;
809 const struct libusb_pollfd **lupfd;
811 uint32_t trigger_offset;
812 uint8_t capturestate;
819 if (devc->dev_state == STOPPING) {
820 /* We've been told to wind up the acquisition. */
821 sr_dbg("Stopping acquisition.");
823 * TODO: Doesn't really cancel pending transfers so they might
824 * come in after SR_DF_END is sent.
826 lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
827 for (i = 0; lupfd[i]; i++)
828 sr_source_remove(lupfd[i]->fd);
831 packet.type = SR_DF_END;
832 sr_session_send(sdi, &packet);
834 devc->dev_state = IDLE;
839 /* Always handle pending libusb events. */
840 tv.tv_sec = tv.tv_usec = 0;
841 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
844 if (devc->dev_state == NEW_CAPTURE) {
845 if (dso_capture_start(sdi) != SR_OK)
847 if (dso_enable_trigger(sdi) != SR_OK)
849 // if (dso_force_trigger(sdi) != SR_OK)
851 sr_dbg("Successfully requested next chunk.");
852 devc->dev_state = CAPTURE;
855 if (devc->dev_state != CAPTURE)
858 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
861 sr_dbg("Capturestate %d.", capturestate);
862 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
863 switch (capturestate) {
865 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
866 devc->capture_empty_count = 0;
867 if (dso_capture_start(sdi) != SR_OK)
869 if (dso_enable_trigger(sdi) != SR_OK)
871 // if (dso_force_trigger(sdi) != SR_OK)
873 sr_dbg("Successfully requested next chunk.");
876 case CAPTURE_FILLING:
879 case CAPTURE_READY_8BIT:
880 /* Remember where in the captured frame the trigger is. */
881 devc->trigger_offset = trigger_offset;
883 num_probes = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
884 /* TODO: Check malloc return value. */
885 devc->framebuf = g_try_malloc(devc->framesize * num_probes * 2);
886 devc->samp_buffered = devc->samp_received = 0;
888 /* Tell the scope to send us the first frame. */
889 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
893 * Don't hit the state machine again until we're done fetching
894 * the data we just told the scope to send.
896 devc->dev_state = FETCH_DATA;
898 /* Tell the frontend a new frame is on the way. */
899 packet.type = SR_DF_FRAME_BEGIN;
900 sr_session_send(sdi, &packet);
902 case CAPTURE_READY_9BIT:
904 sr_err("Not yet supported.");
906 case CAPTURE_TIMEOUT:
907 /* Doesn't matter, we'll try again next time. */
910 sr_dbg("Unknown capture state: %d.", capturestate);
917 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
920 const struct libusb_pollfd **lupfd;
921 struct dev_context *devc;
922 struct drv_context *drvc = di->priv;
925 if (sdi->status != SR_ST_ACTIVE)
926 return SR_ERR_DEV_CLOSED;
929 devc->cb_data = cb_data;
931 if (configure_probes(sdi) != SR_OK) {
932 sr_err("Failed to configure probes.");
936 if (dso_init(sdi) != SR_OK)
939 if (dso_capture_start(sdi) != SR_OK)
942 devc->dev_state = CAPTURE;
943 lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
944 for (i = 0; lupfd[i]; i++)
945 sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK,
946 handle_event, (void *)sdi);
949 /* Send header packet to the session bus. */
950 std_session_send_df_header(cb_data, LOG_PREFIX);
955 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
957 struct dev_context *devc;
961 if (sdi->status != SR_ST_ACTIVE)
965 devc->dev_state = STOPPING;
970 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
971 .name = "hantek-dso",
972 .longname = "Hantek DSO",
975 .cleanup = hw_cleanup,
977 .dev_list = hw_dev_list,
978 .dev_clear = clear_instances,
979 .config_get = config_get,
980 .config_set = config_set,
981 .config_list = config_list,
982 .dev_open = hw_dev_open,
983 .dev_close = hw_dev_close,
984 .dev_acquisition_start = hw_dev_acquisition_start,
985 .dev_acquisition_stop = hw_dev_acquisition_stop,