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_LIMIT_FRAMES | SR_CONF_SET,
53 static const uint32_t devopts_global[] = {
54 SR_CONF_CONN | SR_CONF_GET,
55 SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
56 SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
57 SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
58 SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
59 SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
60 SR_CONF_NUM_TIMEBASE | SR_CONF_GET,
61 SR_CONF_NUM_VDIV | SR_CONF_GET,
64 static const uint32_t devopts_cg[] = {
65 SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
66 SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
67 SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
70 static const char *channel_names[] = {
75 static const uint64_t buffersizes_32k[] = {
78 static const uint64_t buffersizes_512k[] = {
81 static const uint64_t buffersizes_14k[] = {
85 static const struct dso_profile dev_profiles[] = {
86 { 0x04b4, 0x2090, 0x04b5, 0x2090,
89 FIRMWARE_DIR "/hantek-dso-2090.fw" },
90 { 0x04b4, 0x2150, 0x04b5, 0x2150,
93 FIRMWARE_DIR "/hantek-dso-2150.fw" },
94 { 0x04b4, 0x2250, 0x04b5, 0x2250,
97 FIRMWARE_DIR "/hantek-dso-2250.fw" },
98 { 0x04b4, 0x5200, 0x04b5, 0x5200,
101 FIRMWARE_DIR "/hantek-dso-5200.fw" },
102 { 0x04b4, 0x520a, 0x04b5, 0x520a,
103 "Hantek", "DSO-5200A",
105 FIRMWARE_DIR "/hantek-dso-5200A.fw" },
106 { 0, 0, 0, 0, 0, 0, 0, 0 },
109 static const uint64_t timebases[][2] = {
129 static const uint64_t vdivs[][2] = {
143 static const char *trigger_sources[] = {
150 static const char *trigger_slopes[] = {
155 static const char *coupling[] = {
161 SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
162 static struct sr_dev_driver *di = &hantek_dso_driver_info;
164 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
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 drv_context *drvc;
172 struct dev_context *devc;
175 sdi = sr_dev_inst_new(SR_ST_INITIALIZING, prof->vendor, prof->model, NULL);
179 * Add only the real channels -- EXT isn't a source of data, only
180 * a trigger source internal to the device.
182 for (i = 0; channel_names[i]; i++) {
183 ch = sr_channel_new(i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
184 sdi->channels = g_slist_append(sdi->channels, ch);
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->ch1_enabled = TRUE;
196 devc->ch2_enabled = 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;
210 drvc->instances = g_slist_append(drvc->instances, sdi);
215 static int configure_channels(const struct sr_dev_inst *sdi)
217 struct dev_context *devc;
218 struct sr_channel *ch;
224 g_slist_free(devc->enabled_channels);
225 devc->ch1_enabled = devc->ch2_enabled = FALSE;
226 for (l = sdi->channels, p = 0; l; l = l->next, p++) {
229 devc->ch1_enabled = ch->enabled;
231 devc->ch2_enabled = ch->enabled;
233 devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
239 static void clear_dev_context(void *priv)
241 struct dev_context *devc;
244 g_free(devc->triggersource);
245 g_slist_free(devc->enabled_channels);
249 static int dev_clear(void)
251 return std_dev_clear(di, clear_dev_context);
254 static int init(struct sr_context *sr_ctx)
256 return std_init(sr_ctx, di, LOG_PREFIX);
259 static GSList *scan(GSList *options)
261 struct drv_context *drvc;
262 struct dev_context *devc;
263 struct sr_dev_inst *sdi;
264 struct sr_usb_dev_inst *usb;
265 struct sr_config *src;
266 const struct dso_profile *prof;
267 GSList *l, *devices, *conn_devices;
268 struct libusb_device_descriptor des;
269 libusb_device **devlist;
272 char connection_id[64];
279 for (l = options; l; l = l->next) {
281 if (src->key == SR_CONF_CONN) {
282 conn = g_variant_get_string(src->data, NULL);
287 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
291 /* Find all Hantek DSO devices and upload firmware to all of them. */
292 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
293 for (i = 0; devlist[i]; i++) {
296 for (l = conn_devices; l; l = l->next) {
298 if (usb->bus == libusb_get_bus_number(devlist[i])
299 && usb->address == libusb_get_device_address(devlist[i]))
303 /* This device matched none of the ones that
304 * matched the conn specification. */
308 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
309 sr_err("Failed to get device descriptor: %s.",
310 libusb_error_name(ret));
314 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
317 for (j = 0; dev_profiles[j].orig_vid; j++) {
318 if (des.idVendor == dev_profiles[j].orig_vid
319 && des.idProduct == dev_profiles[j].orig_pid) {
320 /* Device matches the pre-firmware profile. */
321 prof = &dev_profiles[j];
322 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
323 sdi = dso_dev_new(prof);
324 sdi->connection_id = g_strdup(connection_id);
325 devices = g_slist_append(devices, sdi);
327 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
328 prof->firmware) == SR_OK)
329 /* Remember when the firmware on this device was updated */
330 devc->fw_updated = g_get_monotonic_time();
332 sr_err("Firmware upload failed");
333 /* Dummy USB address of 0xff will get overwritten later. */
334 sdi->conn = sr_usb_dev_inst_new(
335 libusb_get_bus_number(devlist[i]), 0xff, NULL);
337 } else if (des.idVendor == dev_profiles[j].fw_vid
338 && des.idProduct == dev_profiles[j].fw_pid) {
339 /* Device matches the post-firmware profile. */
340 prof = &dev_profiles[j];
341 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
342 sdi = dso_dev_new(prof);
343 sdi->connection_id = g_strdup(connection_id);
344 sdi->status = SR_ST_INACTIVE;
345 devices = g_slist_append(devices, sdi);
346 sdi->inst_type = SR_INST_USB;
347 sdi->conn = sr_usb_dev_inst_new(
348 libusb_get_bus_number(devlist[i]),
349 libusb_get_device_address(devlist[i]), NULL);
354 /* not a supported VID/PID */
357 libusb_free_device_list(devlist, 1);
362 static GSList *dev_list(void)
364 return ((struct drv_context *)(di->priv))->instances;
367 static int dev_open(struct sr_dev_inst *sdi)
369 struct dev_context *devc;
370 struct sr_usb_dev_inst *usb;
371 int64_t timediff_us, timediff_ms;
378 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
379 * for the FX2 to renumerate.
382 if (devc->fw_updated > 0) {
383 sr_info("Waiting for device to reset.");
384 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
385 g_usleep(300 * 1000);
387 while (timediff_ms < MAX_RENUM_DELAY_MS) {
388 if ((err = dso_open(sdi)) == SR_OK)
390 g_usleep(100 * 1000);
391 timediff_us = g_get_monotonic_time() - devc->fw_updated;
392 timediff_ms = timediff_us / 1000;
393 sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
395 sr_info("Device came back after %d ms.", timediff_ms);
401 sr_err("Unable to open device.");
405 err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
407 sr_err("Unable to claim interface: %s.",
408 libusb_error_name(err));
415 static int dev_close(struct sr_dev_inst *sdi)
422 static int cleanup(void)
427 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
428 const struct sr_channel_group *cg)
430 struct dev_context *devc;
431 struct sr_usb_dev_inst *usb;
433 const uint64_t *vdiv;
439 case SR_CONF_NUM_TIMEBASE:
440 *data = g_variant_new_int32(NUM_TIMEBASE);
442 case SR_CONF_NUM_VDIV:
443 *data = g_variant_new_int32(NUM_VDIV);
457 if (usb->address == 255)
458 /* Device still needs to re-enumerate after firmware
459 * upload, so we don't know its (future) address. */
461 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
462 *data = g_variant_new_string(str);
464 case SR_CONF_TIMEBASE:
465 *data = g_variant_new("(tt)", timebases[devc->timebase][0],
466 timebases[devc->timebase][1]);
468 case SR_CONF_BUFFERSIZE:
469 *data = g_variant_new_uint64(devc->framesize);
471 case SR_CONF_TRIGGER_SOURCE:
472 *data = g_variant_new_string(devc->triggersource);
474 case SR_CONF_TRIGGER_SLOPE:
475 if (devc->triggerslope == SLOPE_POSITIVE)
479 *data = g_variant_new_string(s);
481 case SR_CONF_HORIZ_TRIGGERPOS:
482 *data = g_variant_new_double(devc->triggerposition);
488 if (sdi->channel_groups->data == cg)
490 else if (sdi->channel_groups->next->data == cg)
496 *data = g_variant_new_boolean(devc->filter[ch_idx]);
499 vdiv = vdivs[devc->voltage[ch_idx]];
500 *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
502 case SR_CONF_COUPLING:
503 *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
511 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
512 const struct sr_channel_group *cg)
514 struct dev_context *devc;
516 uint64_t tmp_u64, p, q;
517 int tmp_int, ch_idx, ret;
521 if (sdi->status != SR_ST_ACTIVE)
522 return SR_ERR_DEV_CLOSED;
528 case SR_CONF_LIMIT_FRAMES:
529 devc->limit_frames = g_variant_get_uint64(data);
531 case SR_CONF_TRIGGER_SLOPE:
532 tmp_str = g_variant_get_string(data, NULL);
533 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
535 devc->triggerslope = (tmp_str[0] == 'r')
536 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
538 case SR_CONF_HORIZ_TRIGGERPOS:
539 tmp_double = g_variant_get_double(data);
540 if (tmp_double < 0.0 || tmp_double > 1.0) {
541 sr_err("Trigger position should be between 0.0 and 1.0.");
544 devc->triggerposition = tmp_double;
546 case SR_CONF_BUFFERSIZE:
547 tmp_u64 = g_variant_get_uint64(data);
548 for (i = 0; i < 2; i++) {
549 if (devc->profile->buffersizes[i] == tmp_u64) {
550 devc->framesize = tmp_u64;
557 case SR_CONF_TIMEBASE:
558 g_variant_get(data, "(tt)", &p, &q);
560 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
561 if (timebases[i][0] == p && timebases[i][1] == q) {
567 devc->timebase = tmp_int;
571 case SR_CONF_TRIGGER_SOURCE:
572 tmp_str = g_variant_get_string(data, NULL);
573 for (i = 0; trigger_sources[i]; i++) {
574 if (!strcmp(tmp_str, trigger_sources[i])) {
575 devc->triggersource = g_strdup(tmp_str);
579 if (trigger_sources[i] == 0)
587 if (sdi->channel_groups->data == cg)
589 else if (sdi->channel_groups->next->data == cg)
595 devc->filter[ch_idx] = g_variant_get_boolean(data);
598 g_variant_get(data, "(tt)", &p, &q);
600 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
601 if (vdivs[i][0] == p && vdivs[i][1] == q) {
607 devc->voltage[ch_idx] = tmp_int;
611 case SR_CONF_COUPLING:
612 tmp_str = g_variant_get_string(data, NULL);
613 for (i = 0; coupling[i]; i++) {
614 if (!strcmp(tmp_str, coupling[i])) {
615 devc->coupling[ch_idx] = i;
619 if (coupling[i] == 0)
631 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
632 const struct sr_channel_group *cg)
634 struct dev_context *devc;
635 GVariant *tuple, *rational[2];
639 if (key == SR_CONF_SCAN_OPTIONS) {
640 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
641 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
643 } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
644 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
645 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
654 case SR_CONF_DEVICE_OPTIONS:
655 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
656 devopts_global, ARRAY_SIZE(devopts_global), sizeof(uint32_t));
658 case SR_CONF_BUFFERSIZE:
662 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
663 devc->profile->buffersizes, 2, sizeof(uint64_t));
665 case SR_CONF_TIMEBASE:
666 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
667 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
668 rational[0] = g_variant_new_uint64(timebases[i][0]);
669 rational[1] = g_variant_new_uint64(timebases[i][1]);
670 tuple = g_variant_new_tuple(rational, 2);
671 g_variant_builder_add_value(&gvb, tuple);
673 *data = g_variant_builder_end(&gvb);
675 case SR_CONF_TRIGGER_SOURCE:
676 *data = g_variant_new_strv(trigger_sources,
677 ARRAY_SIZE(trigger_sources));
679 case SR_CONF_TRIGGER_SLOPE:
680 *data = g_variant_new_strv(trigger_slopes,
681 ARRAY_SIZE(trigger_slopes));
688 case SR_CONF_DEVICE_OPTIONS:
689 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
690 devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
692 case SR_CONF_COUPLING:
693 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
696 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
697 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
698 rational[0] = g_variant_new_uint64(vdivs[i][0]);
699 rational[1] = g_variant_new_uint64(vdivs[i][1]);
700 tuple = g_variant_new_tuple(rational, 2);
701 g_variant_builder_add_value(&gvb, tuple);
703 *data = g_variant_builder_end(&gvb);
713 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
716 struct sr_datafeed_packet packet;
717 struct sr_datafeed_analog analog;
718 struct dev_context *devc;
719 float ch1, ch2, range;
720 int num_channels, data_offset, i;
723 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
724 packet.type = SR_DF_ANALOG;
725 packet.payload = &analog;
726 /* TODO: support for 5xxx series 9-bit samples */
727 analog.channels = devc->enabled_channels;
728 analog.num_samples = num_samples;
729 analog.mq = SR_MQ_VOLTAGE;
730 analog.unit = SR_UNIT_VOLT;
732 /* TODO: Check malloc return value. */
733 analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
735 for (i = 0; i < analog.num_samples; i++) {
737 * The device always sends data for both channels. If a channel
738 * is disabled, it contains a copy of the enabled channel's
739 * data. However, we only send the requested channels to
742 * Voltage values are encoded as a value 0-255 (0-512 on the
743 * DSO-5200*), where the value is a point in the range
744 * represented by the vdiv setting. There are 8 vertical divs,
745 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
748 /* TODO: Support for DSO-5xxx series 9-bit samples. */
749 if (devc->ch1_enabled) {
750 range = ((float)vdivs[devc->voltage[0]][0] / vdivs[devc->voltage[0]][1]) * 8;
751 ch1 = range / 255 * *(buf + i * 2 + 1);
752 /* Value is centered around 0V. */
754 analog.data[data_offset++] = ch1;
756 if (devc->ch2_enabled) {
757 range = ((float)vdivs[devc->voltage[1]][0] / vdivs[devc->voltage[1]][1]) * 8;
758 ch2 = range / 255 * *(buf + i * 2);
760 analog.data[data_offset++] = ch2;
763 sr_session_send(devc->cb_data, &packet);
767 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
768 * Only channel data comes in asynchronously, and all transfers for this are
769 * queued up beforehand, so this just needs to chuck the incoming data onto
770 * the libsigrok session bus.
772 static void receive_transfer(struct libusb_transfer *transfer)
774 struct sr_datafeed_packet packet;
775 struct sr_dev_inst *sdi;
776 struct dev_context *devc;
777 int num_samples, pre;
779 sdi = transfer->user_data;
781 sr_spew("receive_transfer(): status %d received %d bytes.",
782 transfer->status, transfer->actual_length);
784 if (transfer->actual_length == 0)
785 /* Nothing to send to the bus. */
788 num_samples = transfer->actual_length / 2;
790 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
791 devc->samp_received + num_samples, devc->framesize);
794 * The device always sends a full frame, but the beginning of the frame
795 * doesn't represent the trigger point. The offset at which the trigger
796 * happened came in with the capture state, so we need to start sending
797 * from there up the session bus. The samples in the frame buffer
798 * before that trigger point came after the end of the device's frame
799 * buffer was reached, and it wrapped around to overwrite up until the
802 if (devc->samp_received < devc->trigger_offset) {
803 /* Trigger point not yet reached. */
804 if (devc->samp_received + num_samples < devc->trigger_offset) {
805 /* The entire chunk is before the trigger point. */
806 memcpy(devc->framebuf + devc->samp_buffered * 2,
807 transfer->buffer, num_samples * 2);
808 devc->samp_buffered += num_samples;
811 * This chunk hits or overruns the trigger point.
812 * Store the part before the trigger fired, and
813 * send the rest up to the session bus.
815 pre = devc->trigger_offset - devc->samp_received;
816 memcpy(devc->framebuf + devc->samp_buffered * 2,
817 transfer->buffer, pre * 2);
818 devc->samp_buffered += pre;
820 /* The rest of this chunk starts with the trigger point. */
821 sr_dbg("Reached trigger point, %d samples buffered.",
822 devc->samp_buffered);
824 /* Avoid the corner case where the chunk ended at
825 * exactly the trigger point. */
826 if (num_samples > pre)
827 send_chunk(sdi, transfer->buffer + pre * 2,
831 /* Already past the trigger point, just send it all out. */
832 send_chunk(sdi, transfer->buffer,
836 devc->samp_received += num_samples;
838 /* Everything in this transfer was either copied to the buffer or
839 * sent to the session bus. */
840 g_free(transfer->buffer);
841 libusb_free_transfer(transfer);
843 if (devc->samp_received >= devc->framesize) {
844 /* That was the last chunk in this frame. Send the buffered
845 * pre-trigger samples out now, in one big chunk. */
846 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
847 devc->samp_buffered);
848 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
850 /* Mark the end of this frame. */
851 packet.type = SR_DF_FRAME_END;
852 sr_session_send(devc->cb_data, &packet);
854 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
855 /* Terminate session */
856 devc->dev_state = STOPPING;
858 devc->dev_state = NEW_CAPTURE;
863 static int handle_event(int fd, int revents, void *cb_data)
865 const struct sr_dev_inst *sdi;
866 struct sr_datafeed_packet packet;
868 struct dev_context *devc;
869 struct drv_context *drvc = di->priv;
871 uint32_t trigger_offset;
872 uint8_t capturestate;
879 if (devc->dev_state == STOPPING) {
880 /* We've been told to wind up the acquisition. */
881 sr_dbg("Stopping acquisition.");
883 * TODO: Doesn't really cancel pending transfers so they might
884 * come in after SR_DF_END is sent.
886 usb_source_remove(sdi->session, drvc->sr_ctx);
888 packet.type = SR_DF_END;
889 sr_session_send(sdi, &packet);
891 devc->dev_state = IDLE;
896 /* Always handle pending libusb events. */
897 tv.tv_sec = tv.tv_usec = 0;
898 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
901 if (devc->dev_state == NEW_CAPTURE) {
902 if (dso_capture_start(sdi) != SR_OK)
904 if (dso_enable_trigger(sdi) != SR_OK)
906 // if (dso_force_trigger(sdi) != SR_OK)
908 sr_dbg("Successfully requested next chunk.");
909 devc->dev_state = CAPTURE;
912 if (devc->dev_state != CAPTURE)
915 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
918 sr_dbg("Capturestate %d.", capturestate);
919 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
920 switch (capturestate) {
922 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
923 devc->capture_empty_count = 0;
924 if (dso_capture_start(sdi) != SR_OK)
926 if (dso_enable_trigger(sdi) != SR_OK)
928 // if (dso_force_trigger(sdi) != SR_OK)
930 sr_dbg("Successfully requested next chunk.");
933 case CAPTURE_FILLING:
936 case CAPTURE_READY_8BIT:
937 /* Remember where in the captured frame the trigger is. */
938 devc->trigger_offset = trigger_offset;
940 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
941 /* TODO: Check malloc return value. */
942 devc->framebuf = g_try_malloc(devc->framesize * num_channels * 2);
943 devc->samp_buffered = devc->samp_received = 0;
945 /* Tell the scope to send us the first frame. */
946 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
950 * Don't hit the state machine again until we're done fetching
951 * the data we just told the scope to send.
953 devc->dev_state = FETCH_DATA;
955 /* Tell the frontend a new frame is on the way. */
956 packet.type = SR_DF_FRAME_BEGIN;
957 sr_session_send(sdi, &packet);
959 case CAPTURE_READY_9BIT:
961 sr_err("Not yet supported.");
963 case CAPTURE_TIMEOUT:
964 /* Doesn't matter, we'll try again next time. */
967 sr_dbg("Unknown capture state: %d.", capturestate);
974 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
976 struct dev_context *devc;
977 struct drv_context *drvc = di->priv;
979 if (sdi->status != SR_ST_ACTIVE)
980 return SR_ERR_DEV_CLOSED;
983 devc->cb_data = cb_data;
985 if (configure_channels(sdi) != SR_OK) {
986 sr_err("Failed to configure channels.");
990 if (dso_init(sdi) != SR_OK)
993 if (dso_capture_start(sdi) != SR_OK)
996 devc->dev_state = CAPTURE;
997 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
999 /* Send header packet to the session bus. */
1000 std_session_send_df_header(cb_data, LOG_PREFIX);
1005 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1007 struct dev_context *devc;
1011 if (sdi->status != SR_ST_ACTIVE)
1015 devc->dev_state = STOPPING;
1020 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
1021 .name = "hantek-dso",
1022 .longname = "Hantek DSO",
1027 .dev_list = dev_list,
1028 .dev_clear = dev_clear,
1029 .config_get = config_get,
1030 .config_set = config_set,
1031 .config_list = config_list,
1032 .dev_open = dev_open,
1033 .dev_close = dev_close,
1034 .dev_acquisition_start = dev_acquisition_start,
1035 .dev_acquisition_stop = dev_acquisition_stop,