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(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(0, 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;
271 char connection_id[64];
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));
313 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
316 for (j = 0; dev_profiles[j].orig_vid; j++) {
317 if (des.idVendor == dev_profiles[j].orig_vid
318 && des.idProduct == dev_profiles[j].orig_pid) {
319 /* Device matches the pre-firmware profile. */
320 prof = &dev_profiles[j];
321 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
322 sdi = dso_dev_new(prof);
323 sdi->connection_id = g_strdup(connection_id);
324 devices = g_slist_append(devices, sdi);
326 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
327 prof->firmware) == SR_OK)
328 /* Remember when the firmware on this device was updated */
329 devc->fw_updated = g_get_monotonic_time();
331 sr_err("Firmware upload failed");
332 /* Dummy USB address of 0xff will get overwritten later. */
333 sdi->conn = sr_usb_dev_inst_new(
334 libusb_get_bus_number(devlist[i]), 0xff, NULL);
336 } else if (des.idVendor == dev_profiles[j].fw_vid
337 && des.idProduct == dev_profiles[j].fw_pid) {
338 /* Device matches the post-firmware profile. */
339 prof = &dev_profiles[j];
340 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
341 sdi = dso_dev_new(prof);
342 sdi->connection_id = g_strdup(connection_id);
343 sdi->status = SR_ST_INACTIVE;
344 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 sr_usb_dev_inst *usb;
437 if (!sdi || !sdi->conn)
440 if (usb->address == 255)
441 /* Device still needs to re-enumerate after firmware
442 * upload, so we don't know its (future) address. */
444 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
445 *data = g_variant_new_string(str);
447 case SR_CONF_NUM_TIMEBASE:
448 *data = g_variant_new_int32(NUM_TIMEBASE);
450 case SR_CONF_NUM_VDIV:
451 *data = g_variant_new_int32(NUM_VDIV);
460 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
461 const struct sr_channel_group *cg)
463 struct dev_context *devc;
465 uint64_t tmp_u64, p, q;
473 if (sdi->status != SR_ST_ACTIVE)
474 return SR_ERR_DEV_CLOSED;
479 case SR_CONF_LIMIT_FRAMES:
480 devc->limit_frames = g_variant_get_uint64(data);
482 case SR_CONF_TRIGGER_SLOPE:
483 tmp_str = g_variant_get_string(data, NULL);
484 if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
486 devc->triggerslope = (tmp_str[0] == 'r')
487 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
489 case SR_CONF_HORIZ_TRIGGERPOS:
490 tmp_double = g_variant_get_double(data);
491 if (tmp_double < 0.0 || tmp_double > 1.0) {
492 sr_err("Trigger position should be between 0.0 and 1.0.");
495 devc->triggerposition = tmp_double;
497 case SR_CONF_BUFFERSIZE:
498 tmp_u64 = g_variant_get_uint64(data);
499 for (i = 0; i < 2; i++) {
500 if (devc->profile->buffersizes[i] == tmp_u64) {
501 devc->framesize = tmp_u64;
508 case SR_CONF_TIMEBASE:
509 g_variant_get(data, "(tt)", &p, &q);
511 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
512 if (timebases[i][0] == p && timebases[i][1] == q) {
518 devc->timebase = tmp_int;
522 case SR_CONF_TRIGGER_SOURCE:
523 tmp_str = g_variant_get_string(data, NULL);
524 for (i = 0; trigger_sources[i]; i++) {
525 if (!strcmp(tmp_str, trigger_sources[i])) {
526 devc->triggersource = g_strdup(tmp_str);
530 if (trigger_sources[i] == 0)
534 tmp_str = g_variant_get_string(data, NULL);
535 devc->filter_ch1 = devc->filter_ch2 = devc->filter_trigger = 0;
536 targets = g_strsplit(tmp_str, ",", 0);
537 for (i = 0; targets[i]; i++) {
538 if (targets[i] == '\0')
539 /* Empty filter string can be used to clear them all. */
541 else if (!strcmp(targets[i], "CH1"))
542 devc->filter_ch1 = TRUE;
543 else if (!strcmp(targets[i], "CH2"))
544 devc->filter_ch2 = TRUE;
545 else if (!strcmp(targets[i], "TRIGGER"))
546 devc->filter_trigger = TRUE;
548 sr_err("Invalid filter target %s.", targets[i]);
555 /* TODO: Not supporting vdiv per channel yet. */
556 g_variant_get(data, "(tt)", &p, &q);
558 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
559 if (vdivs[i][0] == p && vdivs[i][1] == q) {
565 devc->voltage_ch1 = tmp_int;
566 devc->voltage_ch2 = tmp_int;
570 case SR_CONF_COUPLING:
571 tmp_str = g_variant_get_string(data, NULL);
572 /* TODO: Not supporting coupling per channel yet. */
573 for (i = 0; coupling[i]; i++) {
574 if (!strcmp(tmp_str, coupling[i])) {
575 devc->coupling_ch1 = i;
576 devc->coupling_ch2 = i;
580 if (coupling[i] == 0)
591 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
592 const struct sr_channel_group *cg)
594 struct dev_context *devc;
595 GVariant *tuple, *rational[2];
602 case SR_CONF_SCAN_OPTIONS:
603 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
604 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
606 case SR_CONF_DEVICE_OPTIONS:
607 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
608 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
610 case SR_CONF_BUFFERSIZE:
614 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
615 devc->profile->buffersizes, 2, sizeof(uint64_t));
617 case SR_CONF_COUPLING:
618 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
621 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
622 for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
623 rational[0] = g_variant_new_uint64(vdivs[i][0]);
624 rational[1] = g_variant_new_uint64(vdivs[i][1]);
625 tuple = g_variant_new_tuple(rational, 2);
626 g_variant_builder_add_value(&gvb, tuple);
628 *data = g_variant_builder_end(&gvb);
631 *data = g_variant_new_strv(filter_targets,
632 ARRAY_SIZE(filter_targets));
634 case SR_CONF_TIMEBASE:
635 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
636 for (i = 0; i < ARRAY_SIZE(timebases); i++) {
637 rational[0] = g_variant_new_uint64(timebases[i][0]);
638 rational[1] = g_variant_new_uint64(timebases[i][1]);
639 tuple = g_variant_new_tuple(rational, 2);
640 g_variant_builder_add_value(&gvb, tuple);
642 *data = g_variant_builder_end(&gvb);
644 case SR_CONF_TRIGGER_SOURCE:
645 *data = g_variant_new_strv(trigger_sources,
646 ARRAY_SIZE(trigger_sources));
655 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
658 struct sr_datafeed_packet packet;
659 struct sr_datafeed_analog analog;
660 struct dev_context *devc;
661 float ch1, ch2, range;
662 int num_channels, data_offset, i;
665 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
666 packet.type = SR_DF_ANALOG;
667 packet.payload = &analog;
668 /* TODO: support for 5xxx series 9-bit samples */
669 analog.channels = devc->enabled_channels;
670 analog.num_samples = num_samples;
671 analog.mq = SR_MQ_VOLTAGE;
672 analog.unit = SR_UNIT_VOLT;
673 /* TODO: Check malloc return value. */
674 analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
676 for (i = 0; i < analog.num_samples; i++) {
678 * The device always sends data for both channels. If a channel
679 * is disabled, it contains a copy of the enabled channel's
680 * data. However, we only send the requested channels to
683 * Voltage values are encoded as a value 0-255 (0-512 on the
684 * DSO-5200*), where the value is a point in the range
685 * represented by the vdiv setting. There are 8 vertical divs,
686 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
689 /* TODO: Support for DSO-5xxx series 9-bit samples. */
690 if (devc->ch1_enabled) {
691 range = ((float)vdivs[devc->voltage_ch1][0] / vdivs[devc->voltage_ch1][1]) * 8;
692 ch1 = range / 255 * *(buf + i * 2 + 1);
693 /* Value is centered around 0V. */
695 analog.data[data_offset++] = ch1;
697 if (devc->ch2_enabled) {
698 range = ((float)vdivs[devc->voltage_ch2][0] / vdivs[devc->voltage_ch2][1]) * 8;
699 ch2 = range / 255 * *(buf + i * 2);
701 analog.data[data_offset++] = ch2;
704 sr_session_send(devc->cb_data, &packet);
708 * Called by libusb (as triggered by handle_event()) when a transfer comes in.
709 * Only channel data comes in asynchronously, and all transfers for this are
710 * queued up beforehand, so this just needs to chuck the incoming data onto
711 * the libsigrok session bus.
713 static void receive_transfer(struct libusb_transfer *transfer)
715 struct sr_datafeed_packet packet;
716 struct sr_dev_inst *sdi;
717 struct dev_context *devc;
718 int num_samples, pre;
720 sdi = transfer->user_data;
722 sr_spew("receive_transfer(): status %d received %d bytes.",
723 transfer->status, transfer->actual_length);
725 if (transfer->actual_length == 0)
726 /* Nothing to send to the bus. */
729 num_samples = transfer->actual_length / 2;
731 sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
732 devc->samp_received + num_samples, devc->framesize);
735 * The device always sends a full frame, but the beginning of the frame
736 * doesn't represent the trigger point. The offset at which the trigger
737 * happened came in with the capture state, so we need to start sending
738 * from there up the session bus. The samples in the frame buffer
739 * before that trigger point came after the end of the device's frame
740 * buffer was reached, and it wrapped around to overwrite up until the
743 if (devc->samp_received < devc->trigger_offset) {
744 /* Trigger point not yet reached. */
745 if (devc->samp_received + num_samples < devc->trigger_offset) {
746 /* The entire chunk is before the trigger point. */
747 memcpy(devc->framebuf + devc->samp_buffered * 2,
748 transfer->buffer, num_samples * 2);
749 devc->samp_buffered += num_samples;
752 * This chunk hits or overruns the trigger point.
753 * Store the part before the trigger fired, and
754 * send the rest up to the session bus.
756 pre = devc->trigger_offset - devc->samp_received;
757 memcpy(devc->framebuf + devc->samp_buffered * 2,
758 transfer->buffer, pre * 2);
759 devc->samp_buffered += pre;
761 /* The rest of this chunk starts with the trigger point. */
762 sr_dbg("Reached trigger point, %d samples buffered.",
763 devc->samp_buffered);
765 /* Avoid the corner case where the chunk ended at
766 * exactly the trigger point. */
767 if (num_samples > pre)
768 send_chunk(sdi, transfer->buffer + pre * 2,
772 /* Already past the trigger point, just send it all out. */
773 send_chunk(sdi, transfer->buffer,
777 devc->samp_received += num_samples;
779 /* Everything in this transfer was either copied to the buffer or
780 * sent to the session bus. */
781 g_free(transfer->buffer);
782 libusb_free_transfer(transfer);
784 if (devc->samp_received >= devc->framesize) {
785 /* That was the last chunk in this frame. Send the buffered
786 * pre-trigger samples out now, in one big chunk. */
787 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
788 devc->samp_buffered);
789 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
791 /* Mark the end of this frame. */
792 packet.type = SR_DF_FRAME_END;
793 sr_session_send(devc->cb_data, &packet);
795 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
796 /* Terminate session */
797 devc->dev_state = STOPPING;
799 devc->dev_state = NEW_CAPTURE;
804 static int handle_event(int fd, int revents, void *cb_data)
806 const struct sr_dev_inst *sdi;
807 struct sr_datafeed_packet packet;
809 struct dev_context *devc;
810 struct drv_context *drvc = di->priv;
812 uint32_t trigger_offset;
813 uint8_t capturestate;
820 if (devc->dev_state == STOPPING) {
821 /* We've been told to wind up the acquisition. */
822 sr_dbg("Stopping acquisition.");
824 * TODO: Doesn't really cancel pending transfers so they might
825 * come in after SR_DF_END is sent.
827 usb_source_remove(sdi->session, drvc->sr_ctx);
829 packet.type = SR_DF_END;
830 sr_session_send(sdi, &packet);
832 devc->dev_state = IDLE;
837 /* Always handle pending libusb events. */
838 tv.tv_sec = tv.tv_usec = 0;
839 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
842 if (devc->dev_state == NEW_CAPTURE) {
843 if (dso_capture_start(sdi) != SR_OK)
845 if (dso_enable_trigger(sdi) != SR_OK)
847 // if (dso_force_trigger(sdi) != SR_OK)
849 sr_dbg("Successfully requested next chunk.");
850 devc->dev_state = CAPTURE;
853 if (devc->dev_state != CAPTURE)
856 if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
859 sr_dbg("Capturestate %d.", capturestate);
860 sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
861 switch (capturestate) {
863 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
864 devc->capture_empty_count = 0;
865 if (dso_capture_start(sdi) != SR_OK)
867 if (dso_enable_trigger(sdi) != SR_OK)
869 // if (dso_force_trigger(sdi) != SR_OK)
871 sr_dbg("Successfully requested next chunk.");
874 case CAPTURE_FILLING:
877 case CAPTURE_READY_8BIT:
878 /* Remember where in the captured frame the trigger is. */
879 devc->trigger_offset = trigger_offset;
881 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
882 /* TODO: Check malloc return value. */
883 devc->framebuf = g_try_malloc(devc->framesize * num_channels * 2);
884 devc->samp_buffered = devc->samp_received = 0;
886 /* Tell the scope to send us the first frame. */
887 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
891 * Don't hit the state machine again until we're done fetching
892 * the data we just told the scope to send.
894 devc->dev_state = FETCH_DATA;
896 /* Tell the frontend a new frame is on the way. */
897 packet.type = SR_DF_FRAME_BEGIN;
898 sr_session_send(sdi, &packet);
900 case CAPTURE_READY_9BIT:
902 sr_err("Not yet supported.");
904 case CAPTURE_TIMEOUT:
905 /* Doesn't matter, we'll try again next time. */
908 sr_dbg("Unknown capture state: %d.", capturestate);
915 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
917 struct dev_context *devc;
918 struct drv_context *drvc = di->priv;
920 if (sdi->status != SR_ST_ACTIVE)
921 return SR_ERR_DEV_CLOSED;
924 devc->cb_data = cb_data;
926 if (configure_channels(sdi) != SR_OK) {
927 sr_err("Failed to configure channels.");
931 if (dso_init(sdi) != SR_OK)
934 if (dso_capture_start(sdi) != SR_OK)
937 devc->dev_state = CAPTURE;
938 usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
940 /* Send header packet to the session bus. */
941 std_session_send_df_header(cb_data, LOG_PREFIX);
946 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
948 struct dev_context *devc;
952 if (sdi->status != SR_ST_ACTIVE)
956 devc->dev_state = STOPPING;
961 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
962 .name = "hantek-dso",
963 .longname = "Hantek DSO",
968 .dev_list = dev_list,
969 .dev_clear = dev_clear,
970 .config_get = config_get,
971 .config_set = config_set,
972 .config_list = config_list,
973 .dev_open = dev_open,
974 .dev_close = dev_close,
975 .dev_acquisition_start = dev_acquisition_start,
976 .dev_acquisition_stop = dev_acquisition_stop,