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/>.
25 #include <sys/types.h>
34 #include <libsigrok/libsigrok.h>
35 #include "libsigrok-internal.h"
38 /* Max time in ms before we want to check on USB events */
39 /* TODO tune this properly */
42 #define NUM_TIMEBASE 10
45 #define NUM_BUFFER_SIZES 2
47 static const uint32_t scanopts[] = {
51 static const uint32_t drvopts[] = {
55 static const uint32_t devopts[] = {
57 SR_CONF_CONN | SR_CONF_GET,
58 SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
59 SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
60 SR_CONF_NUM_HDIV | SR_CONF_GET,
61 SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
62 SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
63 SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
64 SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
65 SR_CONF_NUM_VDIV | SR_CONF_GET,
68 static const uint32_t devopts_cg[] = {
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 SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
74 static const char *channel_names[] = {
78 static const uint64_t buffersizes_32k[] = {
79 (10 * 1024), (32 * 1024),
81 static const uint64_t buffersizes_512k[] = {
82 (10 * 1024), (512 * 1024),
84 static const uint64_t buffersizes_14k[] = {
85 (10 * 1024), (14 * 1024),
88 static const struct dso_profile dev_profiles[] = {
89 { 0x04b4, 0x2090, 0x04b5, 0x2090,
92 "hantek-dso-2090.fw" },
93 { 0x04b4, 0x2150, 0x04b5, 0x2150,
96 "hantek-dso-2150.fw" },
97 { 0x04b4, 0x2250, 0x04b5, 0x2250,
100 "hantek-dso-2250.fw" },
101 { 0x04b4, 0x5200, 0x04b5, 0x5200,
102 "Hantek", "DSO-5200",
104 "hantek-dso-5200.fw" },
105 { 0x04b4, 0x520a, 0x04b5, 0x520a,
106 "Hantek", "DSO-5200A",
108 "hantek-dso-5200A.fw" },
112 static const uint64_t timebases[][2] = {
132 static const uint64_t vdivs[][2] = {
146 static const char *trigger_sources[] = {
151 static const char *trigger_slopes[] = {
155 static const char *coupling[] = {
159 static struct sr_dev_inst *dso_dev_new(const struct dso_profile *prof)
161 struct sr_dev_inst *sdi;
162 struct sr_channel *ch;
163 struct sr_channel_group *cg;
164 struct dev_context *devc;
167 sdi = g_malloc0(sizeof(struct sr_dev_inst));
168 sdi->status = SR_ST_INITIALIZING;
169 sdi->vendor = g_strdup(prof->vendor);
170 sdi->model = g_strdup(prof->model);
173 * Add only the real channels -- EXT isn't a source of data, only
174 * a trigger source internal to the device.
176 for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
177 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
178 cg = g_malloc0(sizeof(struct sr_channel_group));
179 cg->name = g_strdup(channel_names[i]);
180 cg->channels = g_slist_append(cg->channels, ch);
181 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
184 devc = g_malloc0(sizeof(struct dev_context));
185 devc->profile = prof;
186 devc->dev_state = IDLE;
187 devc->timebase = DEFAULT_TIMEBASE;
188 devc->ch_enabled[0] = TRUE;
189 devc->ch_enabled[1] = TRUE;
190 devc->voltage[0] = DEFAULT_VOLTAGE;
191 devc->voltage[1] = DEFAULT_VOLTAGE;
192 devc->coupling[0] = DEFAULT_COUPLING;
193 devc->coupling[1] = DEFAULT_COUPLING;
194 devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
195 devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
196 devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
197 devc->framesize = DEFAULT_FRAMESIZE;
198 devc->triggerslope = SLOPE_POSITIVE;
199 devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
200 devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
206 static int configure_channels(const struct sr_dev_inst *sdi)
208 struct dev_context *devc;
209 struct sr_channel *ch;
215 g_slist_free(devc->enabled_channels);
216 devc->ch_enabled[0] = devc->ch_enabled[1] = FALSE;
217 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
220 devc->ch_enabled[0] = ch->enabled;
222 devc->ch_enabled[1] = ch->enabled;
224 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
230 static void clear_helper(struct dev_context *devc)
232 g_free(devc->triggersource);
233 g_slist_free(devc->enabled_channels);
236 static int dev_clear(const struct sr_dev_driver *di)
238 return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
241 static GSList *scan(struct sr_dev_driver *di, GSList *options)
243 struct drv_context *drvc;
244 struct dev_context *devc;
245 struct sr_dev_inst *sdi;
246 struct sr_usb_dev_inst *usb;
247 struct sr_config *src;
248 const struct dso_profile *prof;
249 GSList *l, *devices, *conn_devices;
250 struct libusb_device_descriptor des;
251 libusb_device **devlist;
254 char connection_id[64];
261 for (l = options; l; l = l->next) {
263 if (src->key == SR_CONF_CONN) {
264 conn = g_variant_get_string(src->data, NULL);
269 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
273 /* Find all Hantek DSO devices and upload firmware to all of them. */
274 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
275 for (i = 0; devlist[i]; i++) {
278 for (l = conn_devices; l; l = l->next) {
280 if (usb->bus == libusb_get_bus_number(devlist[i])
281 && usb->address == libusb_get_device_address(devlist[i]))
285 /* This device matched none of the ones that
286 * matched the conn specification. */
290 libusb_get_device_descriptor(devlist[i], &des);
292 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
295 for (j = 0; dev_profiles[j].orig_vid; j++) {
296 if (des.idVendor == dev_profiles[j].orig_vid
297 && des.idProduct == dev_profiles[j].orig_pid) {
298 /* Device matches the pre-firmware profile. */
299 prof = &dev_profiles[j];
300 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
301 sdi = dso_dev_new(prof);
302 sdi->connection_id = g_strdup(connection_id);
303 devices = g_slist_append(devices, sdi);
305 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
306 USB_CONFIGURATION, prof->firmware) == SR_OK)
307 /* Remember when the firmware on this device was updated */
308 devc->fw_updated = g_get_monotonic_time();
310 sr_err("Firmware upload failed");
311 /* Dummy USB address of 0xff will get overwritten later. */
312 sdi->conn = sr_usb_dev_inst_new(
313 libusb_get_bus_number(devlist[i]), 0xff, NULL);
315 } else if (des.idVendor == dev_profiles[j].fw_vid
316 && des.idProduct == dev_profiles[j].fw_pid) {
317 /* Device matches the post-firmware profile. */
318 prof = &dev_profiles[j];
319 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
320 sdi = dso_dev_new(prof);
321 sdi->connection_id = g_strdup(connection_id);
322 sdi->status = SR_ST_INACTIVE;
323 devices = g_slist_append(devices, sdi);
324 sdi->inst_type = SR_INST_USB;
325 sdi->conn = sr_usb_dev_inst_new(
326 libusb_get_bus_number(devlist[i]),
327 libusb_get_device_address(devlist[i]), NULL);
332 /* not a supported VID/PID */
335 libusb_free_device_list(devlist, 1);
337 return std_scan_complete(di, devices);
340 static int dev_open(struct sr_dev_inst *sdi)
342 struct dev_context *devc;
343 struct sr_usb_dev_inst *usb;
344 int64_t timediff_us, timediff_ms;
351 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
352 * for the FX2 to renumerate.
355 if (devc->fw_updated > 0) {
356 sr_info("Waiting for device to reset.");
357 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
358 g_usleep(300 * 1000);
360 while (timediff_ms < MAX_RENUM_DELAY_MS) {
361 if ((err = dso_open(sdi)) == SR_OK)
363 g_usleep(100 * 1000);
364 timediff_us = g_get_monotonic_time() - devc->fw_updated;
365 timediff_ms = timediff_us / 1000;
366 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
368 sr_info("Device came back after %" PRIi64 " ms.", timediff_ms);
374 sr_err("Unable to open device.");
378 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
380 sr_err("Unable to claim interface: %s.",
381 libusb_error_name(err));
388 static int dev_close(struct sr_dev_inst *sdi)
395 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
396 const struct sr_channel_group *cg)
398 struct dev_context *devc;
399 struct sr_usb_dev_inst *usb;
402 const uint64_t *vdiv;
406 case SR_CONF_NUM_HDIV:
407 *data = g_variant_new_int32(NUM_TIMEBASE);
409 case SR_CONF_NUM_VDIV:
410 *data = g_variant_new_int32(NUM_VDIV);
424 if (usb->address == 255)
425 /* Device still needs to re-enumerate after firmware
426 * upload, so we don't know its (future) address. */
428 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
429 *data = g_variant_new_string(str);
431 case SR_CONF_TIMEBASE:
432 *data = g_variant_new("(tt)", timebases[devc->timebase][0],
433 timebases[devc->timebase][1]);
435 case SR_CONF_BUFFERSIZE:
436 *data = g_variant_new_uint64(devc->framesize);
438 case SR_CONF_TRIGGER_SOURCE:
439 *data = g_variant_new_string(devc->triggersource);
441 case SR_CONF_TRIGGER_SLOPE:
442 s = (devc->triggerslope == SLOPE_POSITIVE) ? "r" : "f";
443 *data = g_variant_new_string(s);
445 case SR_CONF_HORIZ_TRIGGERPOS:
446 *data = g_variant_new_double(devc->triggerposition);
452 if (sdi->channel_groups->data == cg)
454 else if (sdi->channel_groups->next->data == cg)
460 *data = g_variant_new_boolean(devc->filter[ch_idx]);
463 vdiv = vdivs[devc->voltage[ch_idx]];
464 *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
466 case SR_CONF_COUPLING:
467 *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
475 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
476 const struct sr_channel_group *cg)
478 struct dev_context *devc;
480 uint64_t tmp_u64, p, q;
488 case SR_CONF_LIMIT_FRAMES:
489 devc->limit_frames = g_variant_get_uint64(data);
491 case SR_CONF_TRIGGER_SLOPE:
492 tmp_str = g_variant_get_string(data, NULL);
493 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
495 devc->triggerslope = (tmp_str[0] == 'r')
496 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
498 case SR_CONF_HORIZ_TRIGGERPOS:
499 tmp_double = g_variant_get_double(data);
500 if (tmp_double < 0.0 || tmp_double > 1.0) {
501 sr_err("Trigger position should be between 0.0 and 1.0.");
504 devc->triggerposition = tmp_double;
506 case SR_CONF_BUFFERSIZE:
507 tmp_u64 = g_variant_get_uint64(data);
508 for (i = 0; i < NUM_BUFFER_SIZES; i++) {
509 if (devc->profile->buffersizes[i] == tmp_u64) {
510 devc->framesize = tmp_u64;
514 if (i == NUM_BUFFER_SIZES)
517 case SR_CONF_TIMEBASE:
518 g_variant_get(data, "(tt)", &p, &q);
520 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
521 if (timebases[i][0] == p && timebases[i][1] == q) {
527 devc->timebase = tmp_int;
531 case SR_CONF_TRIGGER_SOURCE:
532 tmp_str = g_variant_get_string(data, NULL);
533 for (i = 0; trigger_sources[i]; i++) {
534 if (!strcmp(tmp_str, trigger_sources[i])) {
535 devc->triggersource = g_strdup(tmp_str);
539 if (trigger_sources[i] == 0)
546 if (sdi->channel_groups->data == cg)
548 else if (sdi->channel_groups->next->data == cg)
554 devc->filter[ch_idx] = g_variant_get_boolean(data);
557 g_variant_get(data, "(tt)", &p, &q);
559 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
560 if (vdivs[i][0] == p && vdivs[i][1] == q) {
566 devc->voltage[ch_idx] = tmp_int;
570 case SR_CONF_COUPLING:
571 tmp_str = g_variant_get_string(data, NULL);
572 for (i = 0; coupling[i]; i++) {
573 if (!strcmp(tmp_str, coupling[i])) {
574 devc->coupling[ch_idx] = i;
578 if (coupling[i] == 0)
589 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
590 const struct sr_channel_group *cg)
592 struct dev_context *devc;
596 case SR_CONF_SCAN_OPTIONS:
597 case SR_CONF_DEVICE_OPTIONS:
598 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
599 case SR_CONF_BUFFERSIZE:
603 *data = std_gvar_array_u64(devc->profile->buffersizes, NUM_BUFFER_SIZES);
605 case SR_CONF_TIMEBASE:
606 *data = std_gvar_tuple_array(&timebases, ARRAY_SIZE(timebases));
608 case SR_CONF_TRIGGER_SOURCE:
609 *data = g_variant_new_strv(ARRAY_AND_SIZE(trigger_sources));
611 case SR_CONF_TRIGGER_SLOPE:
612 *data = g_variant_new_strv(ARRAY_AND_SIZE(trigger_slopes));
619 case SR_CONF_DEVICE_OPTIONS:
620 *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
622 case SR_CONF_COUPLING:
623 *data = g_variant_new_strv(ARRAY_AND_SIZE(coupling));
626 *data = std_gvar_tuple_array(&vdivs, ARRAY_SIZE(vdivs));
636 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
639 struct sr_datafeed_packet packet;
640 struct sr_datafeed_analog analog;
641 struct sr_analog_encoding encoding;
642 struct sr_analog_meaning meaning;
643 struct sr_analog_spec spec;
644 struct dev_context *devc = sdi->priv;
645 GSList *channels = devc->enabled_channels;
647 packet.type = SR_DF_ANALOG;
648 packet.payload = &analog;
649 /* TODO: support for 5xxx series 9-bit samples */
650 sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
651 analog.num_samples = num_samples;
652 analog.meaning->mq = SR_MQ_VOLTAGE;
653 analog.meaning->unit = SR_UNIT_VOLT;
654 analog.meaning->mqflags = 0;
655 /* TODO: Check malloc return value. */
656 analog.data = g_try_malloc(num_samples * sizeof(float));
658 for (int ch = 0; ch < 2; ch++) {
659 if (!devc->ch_enabled[ch])
662 float range = ((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * 8;
663 float vdivlog = log10f(range / 255);
664 int digits = -(int)vdivlog + (vdivlog < 0.0);
665 analog.encoding->digits = digits;
666 analog.spec->spec_digits = digits;
667 analog.meaning->channels = g_slist_append(NULL, channels->data);
669 for (int i = 0; i < num_samples; i++) {
671 * The device always sends data for both channels. If a channel
672 * is disabled, it contains a copy of the enabled channel's
673 * data. However, we only send the requested channels to
676 * Voltage values are encoded as a value 0-255 (0-512 on the
677 * DSO-5200*), where the value is a point in the range
678 * represented by the vdiv setting. There are 8 vertical divs,
679 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
682 /* TODO: Support for DSO-5xxx series 9-bit samples. */
683 ((float *)analog.data)[i] = range / 255 * *(buf + i * 2 + 1 - ch) - range / 2;
685 sr_session_send(sdi, &packet);
686 g_slist_free(analog.meaning->channels);
688 channels = channels->next;
694 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
695 * Only channel data comes in asynchronously, and all transfers for this are
696 * queued up beforehand, so this just needs to chuck the incoming data onto
697 * the libsigrok session bus.
699 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
701 struct sr_datafeed_packet packet;
702 struct sr_dev_inst *sdi;
703 struct dev_context *devc;
704 int num_samples, pre;
706 sdi = transfer->user_data;
708 sr_spew("receive_transfer(): status %s received %d bytes.",
709 libusb_error_name(transfer->status), transfer->actual_length);
711 if (transfer->actual_length == 0)
712 /* Nothing to send to the bus. */
715 num_samples = transfer->actual_length / 2;
717 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
718 devc->samp_received + num_samples, devc->framesize);
721 * The device always sends a full frame, but the beginning of the frame
722 * doesn't represent the trigger point. The offset at which the trigger
723 * happened came in with the capture state, so we need to start sending
724 * from there up the session bus. The samples in the frame buffer
725 * before that trigger point came after the end of the device's frame
726 * buffer was reached, and it wrapped around to overwrite up until the
729 if (devc->samp_received < devc->trigger_offset) {
730 /* Trigger point not yet reached. */
731 if (devc->samp_received + num_samples < devc->trigger_offset) {
732 /* The entire chunk is before the trigger point. */
733 memcpy(devc->framebuf + devc->samp_buffered * 2,
734 transfer->buffer, num_samples * 2);
735 devc->samp_buffered += num_samples;
738 * This chunk hits or overruns the trigger point.
739 * Store the part before the trigger fired, and
740 * send the rest up to the session bus.
742 pre = devc->trigger_offset - devc->samp_received;
743 memcpy(devc->framebuf + devc->samp_buffered * 2,
744 transfer->buffer, pre * 2);
745 devc->samp_buffered += pre;
747 /* The rest of this chunk starts with the trigger point. */
748 sr_dbg("Reached trigger point, %d samples buffered.",
749 devc->samp_buffered);
751 /* Avoid the corner case where the chunk ended at
752 * exactly the trigger point. */
753 if (num_samples > pre)
754 send_chunk(sdi, transfer->buffer + pre * 2,
758 /* Already past the trigger point, just send it all out. */
759 send_chunk(sdi, transfer->buffer, num_samples);
762 devc->samp_received += num_samples;
764 /* Everything in this transfer was either copied to the buffer or
765 * sent to the session bus. */
766 g_free(transfer->buffer);
767 libusb_free_transfer(transfer);
769 if (devc->samp_received >= devc->framesize) {
770 /* That was the last chunk in this frame. Send the buffered
771 * pre-trigger samples out now, in one big chunk. */
772 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
773 devc->samp_buffered);
774 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
776 /* Mark the end of this frame. */
777 packet.type = SR_DF_FRAME_END;
778 sr_session_send(sdi, &packet);
780 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
781 /* Terminate session */
782 devc->dev_state = STOPPING;
784 devc->dev_state = NEW_CAPTURE;
789 static int handle_event(int fd, int revents, void *cb_data)
791 const struct sr_dev_inst *sdi;
792 struct sr_datafeed_packet packet;
794 struct sr_dev_driver *di;
795 struct dev_context *devc;
796 struct drv_context *drvc;
798 uint32_t trigger_offset;
799 uint8_t capturestate;
808 if (devc->dev_state == STOPPING) {
809 /* We've been told to wind up the acquisition. */
810 sr_dbg("Stopping acquisition.");
812 * TODO: Doesn't really cancel pending transfers so they might
813 * come in after SR_DF_END is sent.
815 usb_source_remove(sdi->session, drvc->sr_ctx);
817 std_session_send_df_end(sdi);
819 devc->dev_state = IDLE;
824 /* Always handle pending libusb events. */
825 tv.tv_sec = tv.tv_usec = 0;
826 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
829 if (devc->dev_state == NEW_CAPTURE) {
830 if (dso_capture_start(sdi) != SR_OK)
832 if (dso_enable_trigger(sdi) != SR_OK)
834 // if (dso_force_trigger(sdi) != SR_OK)
836 sr_dbg("Successfully requested next chunk.");
837 devc->dev_state = CAPTURE;
840 if (devc->dev_state != CAPTURE)
843 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
846 sr_dbg("Capturestate %d.", capturestate);
847 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
848 switch (capturestate) {
850 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
851 devc->capture_empty_count = 0;
852 if (dso_capture_start(sdi) != SR_OK)
854 if (dso_enable_trigger(sdi) != SR_OK)
856 // if (dso_force_trigger(sdi) != SR_OK)
858 sr_dbg("Successfully requested next chunk.");
861 case CAPTURE_FILLING:
864 case CAPTURE_READY_8BIT:
865 /* Remember where in the captured frame the trigger is. */
866 devc->trigger_offset = trigger_offset;
868 num_channels = (devc->ch_enabled[0] && devc->ch_enabled[1]) ? 2 : 1;
869 devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
870 devc->samp_buffered = devc->samp_received = 0;
872 /* Tell the scope to send us the first frame. */
873 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
877 * Don't hit the state machine again until we're done fetching
878 * the data we just told the scope to send.
880 devc->dev_state = FETCH_DATA;
882 /* Tell the frontend a new frame is on the way. */
883 packet.type = SR_DF_FRAME_BEGIN;
884 sr_session_send(sdi, &packet);
886 case CAPTURE_READY_9BIT:
888 sr_err("Not yet supported.");
890 case CAPTURE_TIMEOUT:
891 /* Doesn't matter, we'll try again next time. */
894 sr_dbg("Unknown capture state: %d.", capturestate);
901 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
903 struct dev_context *devc;
904 struct sr_dev_driver *di = sdi->driver;
905 struct drv_context *drvc = di->context;
909 if (configure_channels(sdi) != SR_OK) {
910 sr_err("Failed to configure channels.");
914 if (dso_init(sdi) != SR_OK)
917 if (dso_capture_start(sdi) != SR_OK)
920 devc->dev_state = CAPTURE;
921 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
923 std_session_send_df_header(sdi);
928 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
930 struct dev_context *devc;
933 devc->dev_state = STOPPING;
938 static struct sr_dev_driver hantek_dso_driver_info = {
939 .name = "hantek-dso",
940 .longname = "Hantek DSO",
943 .cleanup = std_cleanup,
945 .dev_list = std_dev_list,
946 .dev_clear = dev_clear,
947 .config_get = config_get,
948 .config_set = config_set,
949 .config_list = config_list,
950 .dev_open = dev_open,
951 .dev_close = dev_close,
952 .dev_acquisition_start = dev_acquisition_start,
953 .dev_acquisition_stop = dev_acquisition_stop,
956 SR_REGISTER_DEV_DRIVER(hantek_dso_driver_info);