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 uint32_t scanopts[] = {
47 static const uint32_t devopts[] = {
50 SR_CONF_CONN | SR_CONF_GET,
51 SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
52 SR_CONF_TIMEBASE | SR_CONF_SET | SR_CONF_LIST,
53 SR_CONF_BUFFERSIZE | SR_CONF_SET | SR_CONF_LIST,
54 SR_CONF_TRIGGER_SOURCE | SR_CONF_SET | SR_CONF_LIST,
55 SR_CONF_TRIGGER_SLOPE | SR_CONF_SET,
56 SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_SET,
57 SR_CONF_FILTER | SR_CONF_SET | SR_CONF_LIST,
58 SR_CONF_VDIV | SR_CONF_SET | SR_CONF_LIST,
59 SR_CONF_COUPLING | SR_CONF_SET | SR_CONF_LIST,
60 SR_CONF_NUM_TIMEBASE | SR_CONF_GET,
61 SR_CONF_NUM_VDIV | SR_CONF_GET,
64 static const char *channel_names[] = {
69 static const uint64_t buffersizes_32k[] = {
72 static const uint64_t buffersizes_512k[] = {
75 static const uint64_t buffersizes_14k[] = {
79 static const struct dso_profile dev_profiles[] = {
80 { 0x04b4, 0x2090, 0x04b5, 0x2090,
83 FIRMWARE_DIR "/hantek-dso-2090.fw" },
84 { 0x04b4, 0x2150, 0x04b5, 0x2150,
87 FIRMWARE_DIR "/hantek-dso-2150.fw" },
88 { 0x04b4, 0x2250, 0x04b5, 0x2250,
91 FIRMWARE_DIR "/hantek-dso-2250.fw" },
92 { 0x04b4, 0x5200, 0x04b5, 0x5200,
95 FIRMWARE_DIR "/hantek-dso-5200.fw" },
96 { 0x04b4, 0x520a, 0x04b5, 0x520a,
97 "Hantek", "DSO-5200A",
99 FIRMWARE_DIR "/hantek-dso-5200A.fw" },
100 { 0, 0, 0, 0, 0, 0, 0, 0 },
103 static const uint64_t timebases[][2] = {
123 static const uint64_t vdivs[][2] = {
137 static const char *trigger_sources[] = {
144 static const char *filter_targets[] = {
147 /* TODO: "TRIGGER", */
150 static const char *coupling[] = {
156 SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
157 static struct sr_dev_driver *di = &hantek_dso_driver_info;
159 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
161 static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof)
163 struct sr_dev_inst *sdi;
164 struct sr_channel *ch;
165 struct drv_context *drvc;
166 struct dev_context *devc;
169 sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING,
170 prof->vendor, prof->model, NULL);
176 * Add only the real channels -- EXT isn't a source of data, only
177 * a trigger source internal to the device.
179 for (i = 0; channel_names[i]; i++) {
180 if (!(ch = sr_channel_new(i, SR_CHANNEL_ANALOG, TRUE,
183 sdi->channels = g_slist_append(sdi->channels, ch);
186 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
187 sr_err("Device context malloc failed.");
191 devc->profile = prof;
192 devc->dev_state = IDLE;
193 devc->timebase = DEFAULT_TIMEBASE;
194 devc->ch1_enabled = TRUE;
195 devc->ch2_enabled = TRUE;
196 devc->voltage_ch1 = DEFAULT_VOLTAGE;
197 devc->voltage_ch2 = DEFAULT_VOLTAGE;
198 devc->coupling_ch1 = DEFAULT_COUPLING;
199 devc->coupling_ch2 = DEFAULT_COUPLING;
200 devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
201 devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
202 devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
203 devc->framesize = DEFAULT_FRAMESIZE;
204 devc->triggerslope = SLOPE_POSITIVE;
205 devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
206 devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
209 drvc->instances = g_slist_append(drvc->instances, sdi);
214 static int configure_channels(const struct sr_dev_inst *sdi)
216 struct dev_context *devc;
217 struct sr_channel *ch;
223 g_slist_free(devc->enabled_channels);
224 devc->ch1_enabled = devc->ch2_enabled = FALSE;
225 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
228 devc->ch1_enabled = ch->enabled;
230 devc->ch2_enabled = ch->enabled;
232 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
238 static void clear_dev_context(void *priv)
240 struct dev_context *devc;
243 g_free(devc->triggersource);
244 g_slist_free(devc->enabled_channels);
248 static int dev_clear(void)
250 return std_dev_clear(di, clear_dev_context);
253 static int init(struct sr_context *sr_ctx)
255 return std_init(sr_ctx, di, LOG_PREFIX);
258 static GSList *scan(GSList *options)
260 struct drv_context *drvc;
261 struct dev_context *devc;
262 struct sr_dev_inst *sdi;
263 struct sr_usb_dev_inst *usb;
264 struct sr_config *src;
265 const struct dso_profile *prof;
266 GSList *l, *devices, *conn_devices;
267 struct libusb_device_descriptor des;
268 libusb_device **devlist;
269 int devcnt, ret, i, j;
278 for (l = options; l; l = l->next) {
280 if (src->key == SR_CONF_CONN) {
281 conn = g_variant_get_string(src->data, NULL);
286 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
290 /* Find all Hantek DSO devices and upload firmware to all of them. */
291 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
292 for (i = 0; devlist[i]; i++) {
295 for (l = conn_devices; l; l = l->next) {
297 if (usb->bus == libusb_get_bus_number(devlist[i])
298 && usb->address == libusb_get_device_address(devlist[i]))
302 /* This device matched none of the ones that
303 * matched the conn specification. */
307 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
308 sr_err("Failed to get device descriptor: %s.",
309 libusb_error_name(ret));
314 for (j = 0; dev_profiles[j].orig_vid; j++) {
315 if (des.idVendor == dev_profiles[j].orig_vid
316 && des.idProduct == dev_profiles[j].orig_pid) {
317 /* Device matches the pre-firmware profile. */
318 prof = &dev_profiles[j];
319 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
320 sdi = dso_dev_new(devcnt, prof);
321 devices = g_slist_append(devices, sdi);
323 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
324 prof->firmware) == SR_OK)
325 /* Remember when the firmware on this device was updated */
326 devc->fw_updated = g_get_monotonic_time();
328 sr_err("Firmware upload failed for "
329 "device %d.", devcnt);
330 /* Dummy USB address of 0xff will get overwritten later. */
331 sdi->conn = sr_usb_dev_inst_new(
332 libusb_get_bus_number(devlist[i]), 0xff, NULL);
335 } else if (des.idVendor == dev_profiles[j].fw_vid
336 && des.idProduct == dev_profiles[j].fw_pid) {
337 /* Device matches the post-firmware profile. */
338 prof = &dev_profiles[j];
339 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
340 sdi = dso_dev_new(devcnt, prof);
341 sdi->status = SR_ST_INACTIVE;
342 devices = g_slist_append(devices, sdi);
344 sdi->inst_type = SR_INST_USB;
345 sdi->conn = sr_usb_dev_inst_new(
346 libusb_get_bus_number(devlist[i]),
347 libusb_get_device_address(devlist[i]), NULL);
353 /* not a supported VID/PID */
356 libusb_free_device_list(devlist, 1);
361 static GSList *dev_list(void)
363 return ((struct drv_context *)(di->priv))->instances;
366 static int dev_open(struct sr_dev_inst *sdi)
368 struct dev_context *devc;
369 struct sr_usb_dev_inst *usb;
370 int64_t timediff_us, timediff_ms;
377 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
378 * for the FX2 to renumerate.
381 if (devc->fw_updated > 0) {
382 sr_info("Waiting for device to reset.");
383 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
384 g_usleep(300 * 1000);
386 while (timediff_ms < MAX_RENUM_DELAY_MS) {
387 if ((err = dso_open(sdi)) == SR_OK)
389 g_usleep(100 * 1000);
390 timediff_us = g_get_monotonic_time() - devc->fw_updated;
391 timediff_ms = timediff_us / 1000;
392 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
394 sr_info("Device came back after %d ms.", timediff_ms);
400 sr_err("Unable to open device.");
404 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
406 sr_err("Unable to claim interface: %s.",
407 libusb_error_name(err));
414 static int dev_close(struct sr_dev_inst *sdi)
421 static int cleanup(void)
426 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
427 const struct sr_channel_group *cg)
429 struct sr_usb_dev_inst *usb;
436 if (!sdi || !sdi->conn)
439 if (usb->address == 255)
440 /* Device still needs to re-enumerate after firmware
441 * upload, so we don't know its (future) address. */
443 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
444 *data = g_variant_new_string(str);
446 case SR_CONF_NUM_TIMEBASE:
447 *data = g_variant_new_int32(NUM_TIMEBASE);
449 case SR_CONF_NUM_VDIV:
450 *data = g_variant_new_int32(NUM_VDIV);
459 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
460 const struct sr_channel_group *cg)
462 struct dev_context *devc;
464 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_str = g_variant_get_string(data, NULL);
483 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
485 devc->triggerslope = (tmp_str[0] == 'r')
486 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
488 case SR_CONF_HORIZ_TRIGGERPOS:
489 tmp_double = g_variant_get_double(data);
490 if (tmp_double < 0.0 || tmp_double > 1.0) {
491 sr_err("Trigger position should be between 0.0 and 1.0.");
494 devc->triggerposition = tmp_double;
496 case SR_CONF_BUFFERSIZE:
497 tmp_u64 = g_variant_get_uint64(data);
498 for (i = 0; i < 2; i++) {
499 if (devc->profile->buffersizes[i] == tmp_u64) {
500 devc->framesize = tmp_u64;
507 case SR_CONF_TIMEBASE:
508 g_variant_get(data, "(tt)", &p, &q);
510 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
511 if (timebases[i][0] == p && timebases[i][1] == q) {
517 devc->timebase = tmp_int;
521 case SR_CONF_TRIGGER_SOURCE:
522 tmp_str = g_variant_get_string(data, NULL);
523 for (i = 0; trigger_sources[i]; i++) {
524 if (!strcmp(tmp_str, trigger_sources[i])) {
525 devc->triggersource = g_strdup(tmp_str);
529 if (trigger_sources[i] == 0)
533 tmp_str = g_variant_get_string(data, NULL);
534 devc->filter_ch1 = devc->filter_ch2 = devc->filter_trigger = 0;
535 targets = g_strsplit(tmp_str, ",", 0);
536 for (i = 0; targets[i]; i++) {
537 if (targets[i] == '\0')
538 /* Empty filter string can be used to clear them all. */
540 else if (!strcmp(targets[i], "CH1"))
541 devc->filter_ch1 = TRUE;
542 else if (!strcmp(targets[i], "CH2"))
543 devc->filter_ch2 = TRUE;
544 else if (!strcmp(targets[i], "TRIGGER"))
545 devc->filter_trigger = TRUE;
547 sr_err("Invalid filter target %s.", targets[i]);
554 /* TODO: Not supporting vdiv per channel yet. */
555 g_variant_get(data, "(tt)", &p, &q);
557 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
558 if (vdivs[i][0] == p && vdivs[i][1] == q) {
564 devc->voltage_ch1 = tmp_int;
565 devc->voltage_ch2 = tmp_int;
569 case SR_CONF_COUPLING:
570 tmp_str = g_variant_get_string(data, NULL);
571 /* TODO: Not supporting coupling per channel yet. */
572 for (i = 0; coupling[i]; i++) {
573 if (!strcmp(tmp_str, coupling[i])) {
574 devc->coupling_ch1 = i;
575 devc->coupling_ch2 = i;
579 if (coupling[i] == 0)
590 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
591 const struct sr_channel_group *cg)
593 struct dev_context *devc;
594 GVariant *tuple, *rational[2];
601 case SR_CONF_SCAN_OPTIONS:
602 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
603 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
605 case SR_CONF_DEVICE_OPTIONS:
606 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
607 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
609 case SR_CONF_BUFFERSIZE:
613 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
614 devc->profile->buffersizes, 2, sizeof(uint64_t));
616 case SR_CONF_COUPLING:
617 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
620 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
621 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
622 rational[0] = g_variant_new_uint64(vdivs[i][0]);
623 rational[1] = g_variant_new_uint64(vdivs[i][1]);
624 tuple = g_variant_new_tuple(rational, 2);
625 g_variant_builder_add_value(&gvb, tuple);
627 *data = g_variant_builder_end(&gvb);
630 *data = g_variant_new_strv(filter_targets,
631 ARRAY_SIZE(filter_targets));
633 case SR_CONF_TIMEBASE:
634 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
635 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
636 rational[0] = g_variant_new_uint64(timebases[i][0]);
637 rational[1] = g_variant_new_uint64(timebases[i][1]);
638 tuple = g_variant_new_tuple(rational, 2);
639 g_variant_builder_add_value(&gvb, tuple);
641 *data = g_variant_builder_end(&gvb);
643 case SR_CONF_TRIGGER_SOURCE:
644 *data = g_variant_new_strv(trigger_sources,
645 ARRAY_SIZE(trigger_sources));
654 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
657 struct sr_datafeed_packet packet;
658 struct sr_datafeed_analog analog;
659 struct dev_context *devc;
660 float ch1, ch2, range;
661 int num_channels, data_offset, i;
664 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
665 packet.type = SR_DF_ANALOG;
666 packet.payload = &analog;
667 /* TODO: support for 5xxx series 9-bit samples */
668 analog.channels = devc->enabled_channels;
669 analog.num_samples = num_samples;
670 analog.mq = SR_MQ_VOLTAGE;
671 analog.unit = SR_UNIT_VOLT;
672 /* TODO: Check malloc return value. */
673 analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
675 for (i = 0; i < analog.num_samples; i++) {
677 * The device always sends data for both channels. If a channel
678 * is disabled, it contains a copy of the enabled channel's
679 * data. However, we only send the requested channels to
682 * Voltage values are encoded as a value 0-255 (0-512 on the
683 * DSO-5200*), where the value is a point in the range
684 * represented by the vdiv setting. There are 8 vertical divs,
685 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
688 /* TODO: Support for DSO-5xxx series 9-bit samples. */
689 if (devc->ch1_enabled) {
690 range = ((float)vdivs[devc->voltage_ch1][0] / vdivs[devc->voltage_ch1][1]) * 8;
691 ch1 = range / 255 * *(buf + i * 2 + 1);
692 /* Value is centered around 0V. */
694 analog.data[data_offset++] = ch1;
696 if (devc->ch2_enabled) {
697 range = ((float)vdivs[devc->voltage_ch2][0] / vdivs[devc->voltage_ch2][1]) * 8;
698 ch2 = range / 255 * *(buf + i * 2);
700 analog.data[data_offset++] = ch2;
703 sr_session_send(devc->cb_data, &packet);
707 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
708 * Only channel data comes in asynchronously, and all transfers for this are
709 * queued up beforehand, so this just needs to chuck the incoming data onto
710 * the libsigrok session bus.
712 static void receive_transfer(struct libusb_transfer *transfer)
714 struct sr_datafeed_packet packet;
715 struct sr_dev_inst *sdi;
716 struct dev_context *devc;
717 int num_samples, pre;
719 sdi = transfer->user_data;
721 sr_spew("receive_transfer(): status %d received %d bytes.",
722 transfer->status, transfer->actual_length);
724 if (transfer->actual_length == 0)
725 /* Nothing to send to the bus. */
728 num_samples = transfer->actual_length / 2;
730 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
731 devc->samp_received + num_samples, devc->framesize);
734 * The device always sends a full frame, but the beginning of the frame
735 * doesn't represent the trigger point. The offset at which the trigger
736 * happened came in with the capture state, so we need to start sending
737 * from there up the session bus. The samples in the frame buffer
738 * before that trigger point came after the end of the device's frame
739 * buffer was reached, and it wrapped around to overwrite up until the
742 if (devc->samp_received < devc->trigger_offset) {
743 /* Trigger point not yet reached. */
744 if (devc->samp_received + num_samples < devc->trigger_offset) {
745 /* The entire chunk is before the trigger point. */
746 memcpy(devc->framebuf + devc->samp_buffered * 2,
747 transfer->buffer, num_samples * 2);
748 devc->samp_buffered += num_samples;
751 * This chunk hits or overruns the trigger point.
752 * Store the part before the trigger fired, and
753 * send the rest up to the session bus.
755 pre = devc->trigger_offset - devc->samp_received;
756 memcpy(devc->framebuf + devc->samp_buffered * 2,
757 transfer->buffer, pre * 2);
758 devc->samp_buffered += pre;
760 /* The rest of this chunk starts with the trigger point. */
761 sr_dbg("Reached trigger point, %d samples buffered.",
762 devc->samp_buffered);
764 /* Avoid the corner case where the chunk ended at
765 * exactly the trigger point. */
766 if (num_samples > pre)
767 send_chunk(sdi, transfer->buffer + pre * 2,
771 /* Already past the trigger point, just send it all out. */
772 send_chunk(sdi, transfer->buffer,
776 devc->samp_received += num_samples;
778 /* Everything in this transfer was either copied to the buffer or
779 * sent to the session bus. */
780 g_free(transfer->buffer);
781 libusb_free_transfer(transfer);
783 if (devc->samp_received >= devc->framesize) {
784 /* That was the last chunk in this frame. Send the buffered
785 * pre-trigger samples out now, in one big chunk. */
786 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
787 devc->samp_buffered);
788 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
790 /* Mark the end of this frame. */
791 packet.type = SR_DF_FRAME_END;
792 sr_session_send(devc->cb_data, &packet);
794 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
795 /* Terminate session */
796 devc->dev_state = STOPPING;
798 devc->dev_state = NEW_CAPTURE;
803 static int handle_event(int fd, int revents, void *cb_data)
805 const struct sr_dev_inst *sdi;
806 struct sr_datafeed_packet packet;
808 struct dev_context *devc;
809 struct drv_context *drvc = di->priv;
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 usb_source_remove(sdi->session, drvc->sr_ctx);
828 packet.type = SR_DF_END;
829 sr_session_send(sdi, &packet);
831 devc->dev_state = IDLE;
836 /* Always handle pending libusb events. */
837 tv.tv_sec = tv.tv_usec = 0;
838 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
841 if (devc->dev_state == NEW_CAPTURE) {
842 if (dso_capture_start(sdi) != SR_OK)
844 if (dso_enable_trigger(sdi) != SR_OK)
846 // if (dso_force_trigger(sdi) != SR_OK)
848 sr_dbg("Successfully requested next chunk.");
849 devc->dev_state = CAPTURE;
852 if (devc->dev_state != CAPTURE)
855 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
858 sr_dbg("Capturestate %d.", capturestate);
859 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
860 switch (capturestate) {
862 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
863 devc->capture_empty_count = 0;
864 if (dso_capture_start(sdi) != SR_OK)
866 if (dso_enable_trigger(sdi) != SR_OK)
868 // if (dso_force_trigger(sdi) != SR_OK)
870 sr_dbg("Successfully requested next chunk.");
873 case CAPTURE_FILLING:
876 case CAPTURE_READY_8BIT:
877 /* Remember where in the captured frame the trigger is. */
878 devc->trigger_offset = trigger_offset;
880 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
881 /* TODO: Check malloc return value. */
882 devc->framebuf = g_try_malloc(devc->framesize * num_channels * 2);
883 devc->samp_buffered = devc->samp_received = 0;
885 /* Tell the scope to send us the first frame. */
886 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
890 * Don't hit the state machine again until we're done fetching
891 * the data we just told the scope to send.
893 devc->dev_state = FETCH_DATA;
895 /* Tell the frontend a new frame is on the way. */
896 packet.type = SR_DF_FRAME_BEGIN;
897 sr_session_send(sdi, &packet);
899 case CAPTURE_READY_9BIT:
901 sr_err("Not yet supported.");
903 case CAPTURE_TIMEOUT:
904 /* Doesn't matter, we'll try again next time. */
907 sr_dbg("Unknown capture state: %d.", capturestate);
914 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
916 struct dev_context *devc;
917 struct drv_context *drvc = di->priv;
919 if (sdi->status != SR_ST_ACTIVE)
920 return SR_ERR_DEV_CLOSED;
923 devc->cb_data = cb_data;
925 if (configure_channels(sdi) != SR_OK) {
926 sr_err("Failed to configure channels.");
930 if (dso_init(sdi) != SR_OK)
933 if (dso_capture_start(sdi) != SR_OK)
936 devc->dev_state = CAPTURE;
937 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
939 /* Send header packet to the session bus. */
940 std_session_send_df_header(cb_data, LOG_PREFIX);
945 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
947 struct dev_context *devc;
951 if (sdi->status != SR_ST_ACTIVE)
955 devc->dev_state = STOPPING;
960 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
961 .name = "hantek-dso",
962 .longname = "Hantek DSO",
967 .dev_list = dev_list,
968 .dev_clear = dev_clear,
969 .config_get = config_get,
970 .config_set = config_set,
971 .config_list = config_list,
972 .dev_open = dev_open,
973 .dev_close = dev_close,
974 .dev_acquisition_start = dev_acquisition_start,
975 .dev_acquisition_stop = dev_acquisition_stop,