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[] = {
153 static const char *trigger_slopes[] = {
158 static const char *coupling[] = {
164 static struct sr_dev_inst *dso_dev_new(const struct dso_profile *prof)
166 struct sr_dev_inst *sdi;
167 struct sr_channel *ch;
168 struct sr_channel_group *cg;
169 struct dev_context *devc;
172 sdi = g_malloc0(sizeof(struct sr_dev_inst));
173 sdi->status = SR_ST_INITIALIZING;
174 sdi->vendor = g_strdup(prof->vendor);
175 sdi->model = g_strdup(prof->model);
178 * Add only the real channels -- EXT isn't a source of data, only
179 * a trigger source internal to the device.
181 for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
182 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
183 cg = g_malloc0(sizeof(struct sr_channel_group));
184 cg->name = g_strdup(channel_names[i]);
185 cg->channels = g_slist_append(cg->channels, ch);
186 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
189 devc = g_malloc0(sizeof(struct dev_context));
190 devc->profile = prof;
191 devc->dev_state = IDLE;
192 devc->timebase = DEFAULT_TIMEBASE;
193 devc->ch_enabled[0] = TRUE;
194 devc->ch_enabled[1] = TRUE;
195 devc->voltage[0] = DEFAULT_VOLTAGE;
196 devc->voltage[1] = DEFAULT_VOLTAGE;
197 devc->coupling[0] = DEFAULT_COUPLING;
198 devc->coupling[1] = 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;
211 static int configure_channels(const struct sr_dev_inst *sdi)
213 struct dev_context *devc;
214 struct sr_channel *ch;
220 g_slist_free(devc->enabled_channels);
221 devc->ch_enabled[0] = devc->ch_enabled[1] = FALSE;
222 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
225 devc->ch_enabled[0] = ch->enabled;
227 devc->ch_enabled[1] = ch->enabled;
229 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
235 static void clear_helper(struct dev_context *devc)
237 g_free(devc->triggersource);
238 g_slist_free(devc->enabled_channels);
241 static int dev_clear(const struct sr_dev_driver *di)
243 return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
246 static GSList *scan(struct sr_dev_driver *di, GSList *options)
248 struct drv_context *drvc;
249 struct dev_context *devc;
250 struct sr_dev_inst *sdi;
251 struct sr_usb_dev_inst *usb;
252 struct sr_config *src;
253 const struct dso_profile *prof;
254 GSList *l, *devices, *conn_devices;
255 struct libusb_device_descriptor des;
256 libusb_device **devlist;
259 char connection_id[64];
266 for (l = options; l; l = l->next) {
268 if (src->key == SR_CONF_CONN) {
269 conn = g_variant_get_string(src->data, NULL);
274 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
278 /* Find all Hantek DSO devices and upload firmware to all of them. */
279 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
280 for (i = 0; devlist[i]; i++) {
283 for (l = conn_devices; l; l = l->next) {
285 if (usb->bus == libusb_get_bus_number(devlist[i])
286 && usb->address == libusb_get_device_address(devlist[i]))
290 /* This device matched none of the ones that
291 * matched the conn specification. */
295 libusb_get_device_descriptor(devlist[i], &des);
297 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
300 for (j = 0; dev_profiles[j].orig_vid; j++) {
301 if (des.idVendor == dev_profiles[j].orig_vid
302 && des.idProduct == dev_profiles[j].orig_pid) {
303 /* Device matches the pre-firmware profile. */
304 prof = &dev_profiles[j];
305 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
306 sdi = dso_dev_new(prof);
307 sdi->connection_id = g_strdup(connection_id);
308 devices = g_slist_append(devices, sdi);
310 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
311 USB_CONFIGURATION, prof->firmware) == SR_OK)
312 /* Remember when the firmware on this device was updated */
313 devc->fw_updated = g_get_monotonic_time();
315 sr_err("Firmware upload failed");
316 /* Dummy USB address of 0xff will get overwritten later. */
317 sdi->conn = sr_usb_dev_inst_new(
318 libusb_get_bus_number(devlist[i]), 0xff, NULL);
320 } else if (des.idVendor == dev_profiles[j].fw_vid
321 && des.idProduct == dev_profiles[j].fw_pid) {
322 /* Device matches the post-firmware profile. */
323 prof = &dev_profiles[j];
324 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
325 sdi = dso_dev_new(prof);
326 sdi->connection_id = g_strdup(connection_id);
327 sdi->status = SR_ST_INACTIVE;
328 devices = g_slist_append(devices, sdi);
329 sdi->inst_type = SR_INST_USB;
330 sdi->conn = sr_usb_dev_inst_new(
331 libusb_get_bus_number(devlist[i]),
332 libusb_get_device_address(devlist[i]), NULL);
337 /* not a supported VID/PID */
340 libusb_free_device_list(devlist, 1);
342 return std_scan_complete(di, devices);
345 static int dev_open(struct sr_dev_inst *sdi)
347 struct dev_context *devc;
348 struct sr_usb_dev_inst *usb;
349 int64_t timediff_us, timediff_ms;
356 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
357 * for the FX2 to renumerate.
360 if (devc->fw_updated > 0) {
361 sr_info("Waiting for device to reset.");
362 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
363 g_usleep(300 * 1000);
365 while (timediff_ms < MAX_RENUM_DELAY_MS) {
366 if ((err = dso_open(sdi)) == SR_OK)
368 g_usleep(100 * 1000);
369 timediff_us = g_get_monotonic_time() - devc->fw_updated;
370 timediff_ms = timediff_us / 1000;
371 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
373 sr_info("Device came back after %" PRIi64 " ms.", timediff_ms);
379 sr_err("Unable to open device.");
383 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
385 sr_err("Unable to claim interface: %s.",
386 libusb_error_name(err));
393 static int dev_close(struct sr_dev_inst *sdi)
400 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
401 const struct sr_channel_group *cg)
403 struct dev_context *devc;
404 struct sr_usb_dev_inst *usb;
407 const uint64_t *vdiv;
411 case SR_CONF_NUM_HDIV:
412 *data = g_variant_new_int32(NUM_TIMEBASE);
414 case SR_CONF_NUM_VDIV:
415 *data = g_variant_new_int32(NUM_VDIV);
429 if (usb->address == 255)
430 /* Device still needs to re-enumerate after firmware
431 * upload, so we don't know its (future) address. */
433 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
434 *data = g_variant_new_string(str);
436 case SR_CONF_TIMEBASE:
437 *data = g_variant_new("(tt)", timebases[devc->timebase][0],
438 timebases[devc->timebase][1]);
440 case SR_CONF_BUFFERSIZE:
441 *data = g_variant_new_uint64(devc->framesize);
443 case SR_CONF_TRIGGER_SOURCE:
444 *data = g_variant_new_string(devc->triggersource);
446 case SR_CONF_TRIGGER_SLOPE:
447 s = (devc->triggerslope == SLOPE_POSITIVE) ? "r" : "f";
448 *data = g_variant_new_string(s);
450 case SR_CONF_HORIZ_TRIGGERPOS:
451 *data = g_variant_new_double(devc->triggerposition);
457 if (sdi->channel_groups->data == cg)
459 else if (sdi->channel_groups->next->data == cg)
465 *data = g_variant_new_boolean(devc->filter[ch_idx]);
468 vdiv = vdivs[devc->voltage[ch_idx]];
469 *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
471 case SR_CONF_COUPLING:
472 *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
480 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
481 const struct sr_channel_group *cg)
483 struct dev_context *devc;
485 uint64_t tmp_u64, p, q;
493 case SR_CONF_LIMIT_FRAMES:
494 devc->limit_frames = g_variant_get_uint64(data);
496 case SR_CONF_TRIGGER_SLOPE:
497 tmp_str = g_variant_get_string(data, NULL);
498 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
500 devc->triggerslope = (tmp_str[0] == 'r')
501 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
503 case SR_CONF_HORIZ_TRIGGERPOS:
504 tmp_double = g_variant_get_double(data);
505 if (tmp_double < 0.0 || tmp_double > 1.0) {
506 sr_err("Trigger position should be between 0.0 and 1.0.");
509 devc->triggerposition = tmp_double;
511 case SR_CONF_BUFFERSIZE:
512 tmp_u64 = g_variant_get_uint64(data);
513 for (i = 0; i < NUM_BUFFER_SIZES; i++) {
514 if (devc->profile->buffersizes[i] == tmp_u64) {
515 devc->framesize = tmp_u64;
519 if (i == NUM_BUFFER_SIZES)
522 case SR_CONF_TIMEBASE:
523 g_variant_get(data, "(tt)", &p, &q);
525 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
526 if (timebases[i][0] == p && timebases[i][1] == q) {
532 devc->timebase = tmp_int;
536 case SR_CONF_TRIGGER_SOURCE:
537 tmp_str = g_variant_get_string(data, NULL);
538 for (i = 0; trigger_sources[i]; i++) {
539 if (!strcmp(tmp_str, trigger_sources[i])) {
540 devc->triggersource = g_strdup(tmp_str);
544 if (trigger_sources[i] == 0)
551 if (sdi->channel_groups->data == cg)
553 else if (sdi->channel_groups->next->data == cg)
559 devc->filter[ch_idx] = g_variant_get_boolean(data);
562 g_variant_get(data, "(tt)", &p, &q);
564 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
565 if (vdivs[i][0] == p && vdivs[i][1] == q) {
571 devc->voltage[ch_idx] = tmp_int;
575 case SR_CONF_COUPLING:
576 tmp_str = g_variant_get_string(data, NULL);
577 for (i = 0; coupling[i]; i++) {
578 if (!strcmp(tmp_str, coupling[i])) {
579 devc->coupling[ch_idx] = i;
583 if (coupling[i] == 0)
594 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
595 const struct sr_channel_group *cg)
597 struct dev_context *devc;
601 case SR_CONF_SCAN_OPTIONS:
602 case SR_CONF_DEVICE_OPTIONS:
603 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
604 case SR_CONF_BUFFERSIZE:
608 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
609 devc->profile->buffersizes, NUM_BUFFER_SIZES, sizeof(uint64_t));
611 case SR_CONF_TIMEBASE:
612 *data = std_gvar_tuple_array(&timebases, ARRAY_SIZE(timebases));
614 case SR_CONF_TRIGGER_SOURCE:
615 *data = g_variant_new_strv(trigger_sources,
616 ARRAY_SIZE(trigger_sources));
618 case SR_CONF_TRIGGER_SLOPE:
619 *data = g_variant_new_strv(trigger_slopes,
620 ARRAY_SIZE(trigger_slopes));
627 case SR_CONF_DEVICE_OPTIONS:
628 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
629 devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
631 case SR_CONF_COUPLING:
632 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
635 *data = std_gvar_tuple_array(&vdivs, ARRAY_SIZE(vdivs));
645 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
648 struct sr_datafeed_packet packet;
649 struct sr_datafeed_analog analog;
650 struct sr_analog_encoding encoding;
651 struct sr_analog_meaning meaning;
652 struct sr_analog_spec spec;
653 struct dev_context *devc = sdi->priv;
654 GSList *channels = devc->enabled_channels;
656 packet.type = SR_DF_ANALOG;
657 packet.payload = &analog;
658 /* TODO: support for 5xxx series 9-bit samples */
659 sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
660 analog.num_samples = num_samples;
661 analog.meaning->mq = SR_MQ_VOLTAGE;
662 analog.meaning->unit = SR_UNIT_VOLT;
663 analog.meaning->mqflags = 0;
664 /* TODO: Check malloc return value. */
665 analog.data = g_try_malloc(num_samples * sizeof(float));
667 for (int ch = 0; ch < 2; ch++) {
668 if (!devc->ch_enabled[ch])
671 float range = ((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * 8;
672 float vdivlog = log10f(range / 255);
673 int digits = -(int)vdivlog + (vdivlog < 0.0);
674 analog.encoding->digits = digits;
675 analog.spec->spec_digits = digits;
676 analog.meaning->channels = g_slist_append(NULL, channels->data);
678 for (int i = 0; i < num_samples; i++) {
680 * The device always sends data for both channels. If a channel
681 * is disabled, it contains a copy of the enabled channel's
682 * data. However, we only send the requested channels to
685 * Voltage values are encoded as a value 0-255 (0-512 on the
686 * DSO-5200*), where the value is a point in the range
687 * represented by the vdiv setting. There are 8 vertical divs,
688 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
691 /* TODO: Support for DSO-5xxx series 9-bit samples. */
692 ((float *)analog.data)[i] = range / 255 * *(buf + i * 2 + 1 - ch) - range / 2;
694 sr_session_send(sdi, &packet);
695 g_slist_free(analog.meaning->channels);
697 channels = channels->next;
703 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
704 * Only channel data comes in asynchronously, and all transfers for this are
705 * queued up beforehand, so this just needs to chuck the incoming data onto
706 * the libsigrok session bus.
708 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
710 struct sr_datafeed_packet packet;
711 struct sr_dev_inst *sdi;
712 struct dev_context *devc;
713 int num_samples, pre;
715 sdi = transfer->user_data;
717 sr_spew("receive_transfer(): status %s received %d bytes.",
718 libusb_error_name(transfer->status), transfer->actual_length);
720 if (transfer->actual_length == 0)
721 /* Nothing to send to the bus. */
724 num_samples = transfer->actual_length / 2;
726 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
727 devc->samp_received + num_samples, devc->framesize);
730 * The device always sends a full frame, but the beginning of the frame
731 * doesn't represent the trigger point. The offset at which the trigger
732 * happened came in with the capture state, so we need to start sending
733 * from there up the session bus. The samples in the frame buffer
734 * before that trigger point came after the end of the device's frame
735 * buffer was reached, and it wrapped around to overwrite up until the
738 if (devc->samp_received < devc->trigger_offset) {
739 /* Trigger point not yet reached. */
740 if (devc->samp_received + num_samples < devc->trigger_offset) {
741 /* The entire chunk is before the trigger point. */
742 memcpy(devc->framebuf + devc->samp_buffered * 2,
743 transfer->buffer, num_samples * 2);
744 devc->samp_buffered += num_samples;
747 * This chunk hits or overruns the trigger point.
748 * Store the part before the trigger fired, and
749 * send the rest up to the session bus.
751 pre = devc->trigger_offset - devc->samp_received;
752 memcpy(devc->framebuf + devc->samp_buffered * 2,
753 transfer->buffer, pre * 2);
754 devc->samp_buffered += pre;
756 /* The rest of this chunk starts with the trigger point. */
757 sr_dbg("Reached trigger point, %d samples buffered.",
758 devc->samp_buffered);
760 /* Avoid the corner case where the chunk ended at
761 * exactly the trigger point. */
762 if (num_samples > pre)
763 send_chunk(sdi, transfer->buffer + pre * 2,
767 /* Already past the trigger point, just send it all out. */
768 send_chunk(sdi, transfer->buffer, num_samples);
771 devc->samp_received += num_samples;
773 /* Everything in this transfer was either copied to the buffer or
774 * sent to the session bus. */
775 g_free(transfer->buffer);
776 libusb_free_transfer(transfer);
778 if (devc->samp_received >= devc->framesize) {
779 /* That was the last chunk in this frame. Send the buffered
780 * pre-trigger samples out now, in one big chunk. */
781 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
782 devc->samp_buffered);
783 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
785 /* Mark the end of this frame. */
786 packet.type = SR_DF_FRAME_END;
787 sr_session_send(sdi, &packet);
789 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
790 /* Terminate session */
791 devc->dev_state = STOPPING;
793 devc->dev_state = NEW_CAPTURE;
798 static int handle_event(int fd, int revents, void *cb_data)
800 const struct sr_dev_inst *sdi;
801 struct sr_datafeed_packet packet;
803 struct sr_dev_driver *di;
804 struct dev_context *devc;
805 struct drv_context *drvc;
807 uint32_t trigger_offset;
808 uint8_t capturestate;
817 if (devc->dev_state == STOPPING) {
818 /* We've been told to wind up the acquisition. */
819 sr_dbg("Stopping acquisition.");
821 * TODO: Doesn't really cancel pending transfers so they might
822 * come in after SR_DF_END is sent.
824 usb_source_remove(sdi->session, drvc->sr_ctx);
826 std_session_send_df_end(sdi);
828 devc->dev_state = IDLE;
833 /* Always handle pending libusb events. */
834 tv.tv_sec = tv.tv_usec = 0;
835 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
838 if (devc->dev_state == NEW_CAPTURE) {
839 if (dso_capture_start(sdi) != SR_OK)
841 if (dso_enable_trigger(sdi) != SR_OK)
843 // if (dso_force_trigger(sdi) != SR_OK)
845 sr_dbg("Successfully requested next chunk.");
846 devc->dev_state = CAPTURE;
849 if (devc->dev_state != CAPTURE)
852 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
855 sr_dbg("Capturestate %d.", capturestate);
856 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
857 switch (capturestate) {
859 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
860 devc->capture_empty_count = 0;
861 if (dso_capture_start(sdi) != SR_OK)
863 if (dso_enable_trigger(sdi) != SR_OK)
865 // if (dso_force_trigger(sdi) != SR_OK)
867 sr_dbg("Successfully requested next chunk.");
870 case CAPTURE_FILLING:
873 case CAPTURE_READY_8BIT:
874 /* Remember where in the captured frame the trigger is. */
875 devc->trigger_offset = trigger_offset;
877 num_channels = (devc->ch_enabled[0] && devc->ch_enabled[1]) ? 2 : 1;
878 devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
879 devc->samp_buffered = devc->samp_received = 0;
881 /* Tell the scope to send us the first frame. */
882 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
886 * Don't hit the state machine again until we're done fetching
887 * the data we just told the scope to send.
889 devc->dev_state = FETCH_DATA;
891 /* Tell the frontend a new frame is on the way. */
892 packet.type = SR_DF_FRAME_BEGIN;
893 sr_session_send(sdi, &packet);
895 case CAPTURE_READY_9BIT:
897 sr_err("Not yet supported.");
899 case CAPTURE_TIMEOUT:
900 /* Doesn't matter, we'll try again next time. */
903 sr_dbg("Unknown capture state: %d.", capturestate);
910 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
912 struct dev_context *devc;
913 struct sr_dev_driver *di = sdi->driver;
914 struct drv_context *drvc = di->context;
918 if (configure_channels(sdi) != SR_OK) {
919 sr_err("Failed to configure channels.");
923 if (dso_init(sdi) != SR_OK)
926 if (dso_capture_start(sdi) != SR_OK)
929 devc->dev_state = CAPTURE;
930 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
932 std_session_send_df_header(sdi);
937 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
939 struct dev_context *devc;
942 devc->dev_state = STOPPING;
947 static struct sr_dev_driver hantek_dso_driver_info = {
948 .name = "hantek-dso",
949 .longname = "Hantek DSO",
952 .cleanup = std_cleanup,
954 .dev_list = std_dev_list,
955 .dev_clear = dev_clear,
956 .config_get = config_get,
957 .config_set = config_set,
958 .config_list = config_list,
959 .dev_open = dev_open,
960 .dev_close = dev_close,
961 .dev_acquisition_start = dev_acquisition_start,
962 .dev_acquisition_stop = dev_acquisition_stop,
965 SR_REGISTER_DEV_DRIVER(hantek_dso_driver_info);