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 int dev_acquisition_stop(struct sr_dev_inst *sdi);
166 static struct sr_dev_inst *dso_dev_new(const struct dso_profile *prof)
168 struct sr_dev_inst *sdi;
169 struct sr_channel *ch;
170 struct sr_channel_group *cg;
171 struct dev_context *devc;
174 sdi = g_malloc0(sizeof(struct sr_dev_inst));
175 sdi->status = SR_ST_INITIALIZING;
176 sdi->vendor = g_strdup(prof->vendor);
177 sdi->model = g_strdup(prof->model);
180 * Add only the real channels -- EXT isn't a source of data, only
181 * a trigger source internal to the device.
183 for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
184 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
185 cg = g_malloc0(sizeof(struct sr_channel_group));
186 cg->name = g_strdup(channel_names[i]);
187 cg->channels = g_slist_append(cg->channels, ch);
188 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
191 devc = g_malloc0(sizeof(struct dev_context));
192 devc->profile = prof;
193 devc->dev_state = IDLE;
194 devc->timebase = DEFAULT_TIMEBASE;
195 devc->ch_enabled[0] = TRUE;
196 devc->ch_enabled[1] = TRUE;
197 devc->voltage[0] = DEFAULT_VOLTAGE;
198 devc->voltage[1] = DEFAULT_VOLTAGE;
199 devc->coupling[0] = DEFAULT_COUPLING;
200 devc->coupling[1] = DEFAULT_COUPLING;
201 devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
202 devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
203 devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
204 devc->framesize = DEFAULT_FRAMESIZE;
205 devc->triggerslope = SLOPE_POSITIVE;
206 devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
207 devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
213 static int configure_channels(const struct sr_dev_inst *sdi)
215 struct dev_context *devc;
216 struct sr_channel *ch;
222 g_slist_free(devc->enabled_channels);
223 devc->ch_enabled[0] = devc->ch_enabled[1] = FALSE;
224 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
227 devc->ch_enabled[0] = ch->enabled;
229 devc->ch_enabled[1] = ch->enabled;
231 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
237 static void clear_dev_context(void *priv)
239 struct dev_context *devc;
242 g_free(devc->triggersource);
243 g_slist_free(devc->enabled_channels);
247 static int dev_clear(const struct sr_dev_driver *di)
249 return std_dev_clear(di, clear_dev_context);
252 static GSList *scan(struct sr_dev_driver *di, GSList *options)
254 struct drv_context *drvc;
255 struct dev_context *devc;
256 struct sr_dev_inst *sdi;
257 struct sr_usb_dev_inst *usb;
258 struct sr_config *src;
259 const struct dso_profile *prof;
260 GSList *l, *devices, *conn_devices;
261 struct libusb_device_descriptor des;
262 libusb_device **devlist;
265 char connection_id[64];
272 for (l = options; l; l = l->next) {
274 if (src->key == SR_CONF_CONN) {
275 conn = g_variant_get_string(src->data, NULL);
280 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
284 /* Find all Hantek DSO devices and upload firmware to all of them. */
285 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
286 for (i = 0; devlist[i]; i++) {
289 for (l = conn_devices; l; l = l->next) {
291 if (usb->bus == libusb_get_bus_number(devlist[i])
292 && usb->address == libusb_get_device_address(devlist[i]))
296 /* This device matched none of the ones that
297 * matched the conn specification. */
301 libusb_get_device_descriptor(devlist[i], &des);
303 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
306 for (j = 0; dev_profiles[j].orig_vid; j++) {
307 if (des.idVendor == dev_profiles[j].orig_vid
308 && des.idProduct == dev_profiles[j].orig_pid) {
309 /* Device matches the pre-firmware profile. */
310 prof = &dev_profiles[j];
311 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
312 sdi = dso_dev_new(prof);
313 sdi->connection_id = g_strdup(connection_id);
314 devices = g_slist_append(devices, sdi);
316 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
317 USB_CONFIGURATION, prof->firmware) == SR_OK)
318 /* Remember when the firmware on this device was updated */
319 devc->fw_updated = g_get_monotonic_time();
321 sr_err("Firmware upload failed");
322 /* Dummy USB address of 0xff will get overwritten later. */
323 sdi->conn = sr_usb_dev_inst_new(
324 libusb_get_bus_number(devlist[i]), 0xff, NULL);
326 } else if (des.idVendor == dev_profiles[j].fw_vid
327 && des.idProduct == dev_profiles[j].fw_pid) {
328 /* Device matches the post-firmware profile. */
329 prof = &dev_profiles[j];
330 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
331 sdi = dso_dev_new(prof);
332 sdi->connection_id = g_strdup(connection_id);
333 sdi->status = SR_ST_INACTIVE;
334 devices = g_slist_append(devices, sdi);
335 sdi->inst_type = SR_INST_USB;
336 sdi->conn = sr_usb_dev_inst_new(
337 libusb_get_bus_number(devlist[i]),
338 libusb_get_device_address(devlist[i]), NULL);
343 /* not a supported VID/PID */
346 libusb_free_device_list(devlist, 1);
348 return std_scan_complete(di, devices);
351 static int dev_open(struct sr_dev_inst *sdi)
353 struct dev_context *devc;
354 struct sr_usb_dev_inst *usb;
355 int64_t timediff_us, timediff_ms;
362 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
363 * for the FX2 to renumerate.
366 if (devc->fw_updated > 0) {
367 sr_info("Waiting for device to reset.");
368 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
369 g_usleep(300 * 1000);
371 while (timediff_ms < MAX_RENUM_DELAY_MS) {
372 if ((err = dso_open(sdi)) == SR_OK)
374 g_usleep(100 * 1000);
375 timediff_us = g_get_monotonic_time() - devc->fw_updated;
376 timediff_ms = timediff_us / 1000;
377 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
379 sr_info("Device came back after %" PRIi64 " ms.", timediff_ms);
385 sr_err("Unable to open device.");
389 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
391 sr_err("Unable to claim interface: %s.",
392 libusb_error_name(err));
399 static int dev_close(struct sr_dev_inst *sdi)
406 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
407 const struct sr_channel_group *cg)
409 struct dev_context *devc;
410 struct sr_usb_dev_inst *usb;
413 const uint64_t *vdiv;
417 case SR_CONF_NUM_HDIV:
418 *data = g_variant_new_int32(NUM_TIMEBASE);
420 case SR_CONF_NUM_VDIV:
421 *data = g_variant_new_int32(NUM_VDIV);
435 if (usb->address == 255)
436 /* Device still needs to re-enumerate after firmware
437 * upload, so we don't know its (future) address. */
439 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
440 *data = g_variant_new_string(str);
442 case SR_CONF_TIMEBASE:
443 *data = g_variant_new("(tt)", timebases[devc->timebase][0],
444 timebases[devc->timebase][1]);
446 case SR_CONF_BUFFERSIZE:
447 *data = g_variant_new_uint64(devc->framesize);
449 case SR_CONF_TRIGGER_SOURCE:
450 *data = g_variant_new_string(devc->triggersource);
452 case SR_CONF_TRIGGER_SLOPE:
453 s = (devc->triggerslope == SLOPE_POSITIVE) ? "r" : "f";
454 *data = g_variant_new_string(s);
456 case SR_CONF_HORIZ_TRIGGERPOS:
457 *data = g_variant_new_double(devc->triggerposition);
463 if (sdi->channel_groups->data == cg)
465 else if (sdi->channel_groups->next->data == cg)
471 *data = g_variant_new_boolean(devc->filter[ch_idx]);
474 vdiv = vdivs[devc->voltage[ch_idx]];
475 *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
477 case SR_CONF_COUPLING:
478 *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
486 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
487 const struct sr_channel_group *cg)
489 struct dev_context *devc;
491 uint64_t tmp_u64, p, q;
492 int tmp_int, ch_idx, ret;
496 if (sdi->status != SR_ST_ACTIVE)
497 return SR_ERR_DEV_CLOSED;
503 case SR_CONF_LIMIT_FRAMES:
504 devc->limit_frames = g_variant_get_uint64(data);
506 case SR_CONF_TRIGGER_SLOPE:
507 tmp_str = g_variant_get_string(data, NULL);
508 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
510 devc->triggerslope = (tmp_str[0] == 'r')
511 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
513 case SR_CONF_HORIZ_TRIGGERPOS:
514 tmp_double = g_variant_get_double(data);
515 if (tmp_double < 0.0 || tmp_double > 1.0) {
516 sr_err("Trigger position should be between 0.0 and 1.0.");
519 devc->triggerposition = tmp_double;
521 case SR_CONF_BUFFERSIZE:
522 tmp_u64 = g_variant_get_uint64(data);
523 for (i = 0; i < NUM_BUFFER_SIZES; i++) {
524 if (devc->profile->buffersizes[i] == tmp_u64) {
525 devc->framesize = tmp_u64;
529 if (i == NUM_BUFFER_SIZES)
532 case SR_CONF_TIMEBASE:
533 g_variant_get(data, "(tt)", &p, &q);
535 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
536 if (timebases[i][0] == p && timebases[i][1] == q) {
542 devc->timebase = tmp_int;
546 case SR_CONF_TRIGGER_SOURCE:
547 tmp_str = g_variant_get_string(data, NULL);
548 for (i = 0; trigger_sources[i]; i++) {
549 if (!strcmp(tmp_str, trigger_sources[i])) {
550 devc->triggersource = g_strdup(tmp_str);
554 if (trigger_sources[i] == 0)
562 if (sdi->channel_groups->data == cg)
564 else if (sdi->channel_groups->next->data == cg)
570 devc->filter[ch_idx] = g_variant_get_boolean(data);
573 g_variant_get(data, "(tt)", &p, &q);
575 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
576 if (vdivs[i][0] == p && vdivs[i][1] == q) {
582 devc->voltage[ch_idx] = tmp_int;
586 case SR_CONF_COUPLING:
587 tmp_str = g_variant_get_string(data, NULL);
588 for (i = 0; coupling[i]; i++) {
589 if (!strcmp(tmp_str, coupling[i])) {
590 devc->coupling[ch_idx] = i;
594 if (coupling[i] == 0)
606 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
607 const struct sr_channel_group *cg)
609 struct dev_context *devc;
610 GVariant *tuple, *rational[2];
614 if (key == SR_CONF_SCAN_OPTIONS) {
615 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
616 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
618 } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
619 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
620 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
629 case SR_CONF_DEVICE_OPTIONS:
630 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
631 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
633 case SR_CONF_BUFFERSIZE:
637 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
638 devc->profile->buffersizes, NUM_BUFFER_SIZES, sizeof(uint64_t));
640 case SR_CONF_TIMEBASE:
641 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
642 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
643 rational[0] = g_variant_new_uint64(timebases[i][0]);
644 rational[1] = g_variant_new_uint64(timebases[i][1]);
645 tuple = g_variant_new_tuple(rational, 2);
646 g_variant_builder_add_value(&gvb, tuple);
648 *data = g_variant_builder_end(&gvb);
650 case SR_CONF_TRIGGER_SOURCE:
651 *data = g_variant_new_strv(trigger_sources,
652 ARRAY_SIZE(trigger_sources));
654 case SR_CONF_TRIGGER_SLOPE:
655 *data = g_variant_new_strv(trigger_slopes,
656 ARRAY_SIZE(trigger_slopes));
663 case SR_CONF_DEVICE_OPTIONS:
664 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
665 devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
667 case SR_CONF_COUPLING:
668 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
671 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
672 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
673 rational[0] = g_variant_new_uint64(vdivs[i][0]);
674 rational[1] = g_variant_new_uint64(vdivs[i][1]);
675 tuple = g_variant_new_tuple(rational, 2);
676 g_variant_builder_add_value(&gvb, tuple);
678 *data = g_variant_builder_end(&gvb);
688 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
691 struct sr_datafeed_packet packet;
692 struct sr_datafeed_analog analog;
693 struct sr_analog_encoding encoding;
694 struct sr_analog_meaning meaning;
695 struct sr_analog_spec spec;
696 struct dev_context *devc = sdi->priv;
697 GSList *channels = devc->enabled_channels;
699 packet.type = SR_DF_ANALOG;
700 packet.payload = &analog;
701 /* TODO: support for 5xxx series 9-bit samples */
702 sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
703 analog.num_samples = num_samples;
704 analog.meaning->mq = SR_MQ_VOLTAGE;
705 analog.meaning->unit = SR_UNIT_VOLT;
706 analog.meaning->mqflags = 0;
707 /* TODO: Check malloc return value. */
708 analog.data = g_try_malloc(num_samples * sizeof(float));
710 for (int ch = 0; ch < 2; ch++) {
711 if (!devc->ch_enabled[ch])
714 float range = ((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * 8;
715 float vdivlog = log10f(range / 255);
716 int digits = -(int)vdivlog + (vdivlog < 0.0);
717 analog.encoding->digits = digits;
718 analog.spec->spec_digits = digits;
719 analog.meaning->channels = g_slist_append(NULL, channels->data);
721 for (int i = 0; i < num_samples; i++) {
723 * The device always sends data for both channels. If a channel
724 * is disabled, it contains a copy of the enabled channel's
725 * data. However, we only send the requested channels to
728 * Voltage values are encoded as a value 0-255 (0-512 on the
729 * DSO-5200*), where the value is a point in the range
730 * represented by the vdiv setting. There are 8 vertical divs,
731 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
734 /* TODO: Support for DSO-5xxx series 9-bit samples. */
735 ((float *)analog.data)[i] = range / 255 * *(buf + i * 2 + 1 - ch) - range / 2;
737 sr_session_send(sdi, &packet);
738 g_slist_free(analog.meaning->channels);
740 channels = channels->next;
746 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
747 * Only channel data comes in asynchronously, and all transfers for this are
748 * queued up beforehand, so this just needs to chuck the incoming data onto
749 * the libsigrok session bus.
751 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
753 struct sr_datafeed_packet packet;
754 struct sr_dev_inst *sdi;
755 struct dev_context *devc;
756 int num_samples, pre;
758 sdi = transfer->user_data;
760 sr_spew("receive_transfer(): status %s received %d bytes.",
761 libusb_error_name(transfer->status), transfer->actual_length);
763 if (transfer->actual_length == 0)
764 /* Nothing to send to the bus. */
767 num_samples = transfer->actual_length / 2;
769 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
770 devc->samp_received + num_samples, devc->framesize);
773 * The device always sends a full frame, but the beginning of the frame
774 * doesn't represent the trigger point. The offset at which the trigger
775 * happened came in with the capture state, so we need to start sending
776 * from there up the session bus. The samples in the frame buffer
777 * before that trigger point came after the end of the device's frame
778 * buffer was reached, and it wrapped around to overwrite up until the
781 if (devc->samp_received < devc->trigger_offset) {
782 /* Trigger point not yet reached. */
783 if (devc->samp_received + num_samples < devc->trigger_offset) {
784 /* The entire chunk is before the trigger point. */
785 memcpy(devc->framebuf + devc->samp_buffered * 2,
786 transfer->buffer, num_samples * 2);
787 devc->samp_buffered += num_samples;
790 * This chunk hits or overruns the trigger point.
791 * Store the part before the trigger fired, and
792 * send the rest up to the session bus.
794 pre = devc->trigger_offset - devc->samp_received;
795 memcpy(devc->framebuf + devc->samp_buffered * 2,
796 transfer->buffer, pre * 2);
797 devc->samp_buffered += pre;
799 /* The rest of this chunk starts with the trigger point. */
800 sr_dbg("Reached trigger point, %d samples buffered.",
801 devc->samp_buffered);
803 /* Avoid the corner case where the chunk ended at
804 * exactly the trigger point. */
805 if (num_samples > pre)
806 send_chunk(sdi, transfer->buffer + pre * 2,
810 /* Already past the trigger point, just send it all out. */
811 send_chunk(sdi, transfer->buffer, num_samples);
814 devc->samp_received += num_samples;
816 /* Everything in this transfer was either copied to the buffer or
817 * sent to the session bus. */
818 g_free(transfer->buffer);
819 libusb_free_transfer(transfer);
821 if (devc->samp_received >= devc->framesize) {
822 /* That was the last chunk in this frame. Send the buffered
823 * pre-trigger samples out now, in one big chunk. */
824 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
825 devc->samp_buffered);
826 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
828 /* Mark the end of this frame. */
829 packet.type = SR_DF_FRAME_END;
830 sr_session_send(sdi, &packet);
832 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
833 /* Terminate session */
834 devc->dev_state = STOPPING;
836 devc->dev_state = NEW_CAPTURE;
841 static int handle_event(int fd, int revents, void *cb_data)
843 const struct sr_dev_inst *sdi;
844 struct sr_datafeed_packet packet;
846 struct sr_dev_driver *di;
847 struct dev_context *devc;
848 struct drv_context *drvc;
850 uint32_t trigger_offset;
851 uint8_t capturestate;
860 if (devc->dev_state == STOPPING) {
861 /* We've been told to wind up the acquisition. */
862 sr_dbg("Stopping acquisition.");
864 * TODO: Doesn't really cancel pending transfers so they might
865 * come in after SR_DF_END is sent.
867 usb_source_remove(sdi->session, drvc->sr_ctx);
869 std_session_send_df_end(sdi);
871 devc->dev_state = IDLE;
876 /* Always handle pending libusb events. */
877 tv.tv_sec = tv.tv_usec = 0;
878 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
881 if (devc->dev_state == NEW_CAPTURE) {
882 if (dso_capture_start(sdi) != SR_OK)
884 if (dso_enable_trigger(sdi) != SR_OK)
886 // if (dso_force_trigger(sdi) != SR_OK)
888 sr_dbg("Successfully requested next chunk.");
889 devc->dev_state = CAPTURE;
892 if (devc->dev_state != CAPTURE)
895 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
898 sr_dbg("Capturestate %d.", capturestate);
899 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
900 switch (capturestate) {
902 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
903 devc->capture_empty_count = 0;
904 if (dso_capture_start(sdi) != SR_OK)
906 if (dso_enable_trigger(sdi) != SR_OK)
908 // if (dso_force_trigger(sdi) != SR_OK)
910 sr_dbg("Successfully requested next chunk.");
913 case CAPTURE_FILLING:
916 case CAPTURE_READY_8BIT:
917 /* Remember where in the captured frame the trigger is. */
918 devc->trigger_offset = trigger_offset;
920 num_channels = (devc->ch_enabled[0] && devc->ch_enabled[1]) ? 2 : 1;
921 devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
922 devc->samp_buffered = devc->samp_received = 0;
924 /* Tell the scope to send us the first frame. */
925 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
929 * Don't hit the state machine again until we're done fetching
930 * the data we just told the scope to send.
932 devc->dev_state = FETCH_DATA;
934 /* Tell the frontend a new frame is on the way. */
935 packet.type = SR_DF_FRAME_BEGIN;
936 sr_session_send(sdi, &packet);
938 case CAPTURE_READY_9BIT:
940 sr_err("Not yet supported.");
942 case CAPTURE_TIMEOUT:
943 /* Doesn't matter, we'll try again next time. */
946 sr_dbg("Unknown capture state: %d.", capturestate);
953 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
955 struct dev_context *devc;
956 struct sr_dev_driver *di = sdi->driver;
957 struct drv_context *drvc = di->context;
959 if (sdi->status != SR_ST_ACTIVE)
960 return SR_ERR_DEV_CLOSED;
964 if (configure_channels(sdi) != SR_OK) {
965 sr_err("Failed to configure channels.");
969 if (dso_init(sdi) != SR_OK)
972 if (dso_capture_start(sdi) != SR_OK)
975 devc->dev_state = CAPTURE;
976 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
978 std_session_send_df_header(sdi);
983 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
985 struct dev_context *devc;
987 if (sdi->status != SR_ST_ACTIVE)
991 devc->dev_state = STOPPING;
996 static struct sr_dev_driver hantek_dso_driver_info = {
997 .name = "hantek-dso",
998 .longname = "Hantek DSO",
1001 .cleanup = std_cleanup,
1003 .dev_list = std_dev_list,
1004 .dev_clear = dev_clear,
1005 .config_get = config_get,
1006 .config_set = config_set,
1007 .config_list = config_list,
1008 .dev_open = dev_open,
1009 .dev_close = dev_close,
1010 .dev_acquisition_start = dev_acquisition_start,
1011 .dev_acquisition_stop = dev_acquisition_stop,
1014 SR_REGISTER_DEV_DRIVER(hantek_dso_driver_info);