2 * This file is part of the sigrok project.
4 * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de>
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 2 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, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #define USB_VENDOR_ID 0x0403
25 #define USB_PRODUCT_ID 0x6001
26 #define USB_DESCRIPTION "ChronoVu LA8"
27 #define USB_VENDOR_NAME "ChronoVu"
28 #define USB_MODEL_NAME "LA8"
29 #define USB_MODEL_VERSION ""
32 #define TRIGGER_TYPES "01"
33 #define SDRAM_SIZE (8 * 1024 * 1024)
34 #define MIN_NUM_SAMPLES 1
36 static GSList *device_instances = NULL;
39 /** FTDI device context (used by libftdi). */
40 struct ftdi_context *ftdic;
42 /** The currently configured samplerate of the device. */
43 uint64_t cur_samplerate;
45 /** The current sampling limit (in ms). */
48 /** The current sampling limit (in number of samples). */
49 uint64_t limit_samples;
51 /** The number of probes. */
58 * An 8MB buffer containing the (mangled) samples from the device.
59 * Format: Pretty mangled-up (due to hardware reasons), see code.
64 * An 8MB buffer where we'll store the de-mangled samples.
65 * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0.
70 * Trigger pattern (MSB = channel 7, LSB = channel 0).
71 * A 1 bit matches a high signal, 0 matches a low signal on a probe.
72 * Only low/high triggers (but not e.g. rising/falling) are supported.
74 uint8_t trigger_pattern;
77 * Trigger mask (MSB = channel 7, LSB = channel 0).
78 * A 1 bit means "must match trigger_pattern", 0 means "don't care".
82 /** Time (in seconds) before the trigger times out. */
83 uint64_t trigger_timeout;
88 /** Counter/index for the data block (0..2047) to be read. */
91 /** The divcount value (determines the sample period) for the LA8. */
95 /* This will be initialized via hw_get_device_info()/SR_DI_SAMPLERATES. */
96 static uint64_t supported_samplerates[255 + 1] = { 0 };
99 * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
100 * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
102 static struct sr_samplerates samplerates = {
106 .list = supported_samplerates,
109 /* Note: Continuous sampling is not supported by the hardware. */
110 static int capabilities[] = {
111 SR_HWCAP_LOGIC_ANALYZER,
113 SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */
114 SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
118 /* Function prototypes. */
119 static int la8_close_usb_reset_sequencer(struct la8 *la8);
120 static void hw_stop_acquisition(int device_index, gpointer session_device_id);
121 static int la8_reset(struct la8 *la8);
123 static void fill_supported_samplerates_if_needed(void)
127 /* Do nothing if supported_samplerates[] is already filled. */
128 if (supported_samplerates[0] != 0)
131 /* Fill supported_samplerates[] with the proper values. */
132 for (i = 0; i < 255; i++)
133 supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
134 supported_samplerates[255] = 0;
138 * Check if the given samplerate is supported by the LA8 hardware.
140 * @param samplerate The samplerate (in Hz) to check.
141 * @return 1 if the samplerate is supported/valid, 0 otherwise.
143 static int is_valid_samplerate(uint64_t samplerate)
147 fill_supported_samplerates_if_needed();
149 for (i = 0; i < 255; i++) {
150 if (supported_samplerates[i] == samplerate)
154 g_warning("la8: %s: invalid samplerate (%" PRIu64 "Hz)",
155 __func__, samplerate);
161 * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
163 * LA8 hardware: sample period = (divcount + 1) * 10ns.
164 * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
165 * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
167 * @param samplerate The samplerate in Hz.
168 * @return The divcount value as needed by the hardware, or 0xff upon errors.
170 static uint8_t samplerate_to_divcount(uint64_t samplerate)
172 if (samplerate == 0) {
173 g_warning("la8: %s: samplerate was 0", __func__);
177 if (!is_valid_samplerate(samplerate)) {
178 g_warning("la8: %s: can't get divcount, samplerate invalid",
183 return (SR_MHZ(100) / samplerate) - 1;
187 * Write data of a certain length to the LA8's FTDI device.
189 * @param la8 The LA8 struct containing private per-device-instance data.
190 * @param buf The buffer containing the data to write.
191 * @param size The number of bytes to write.
192 * @return The number of bytes written, or a negative value upon errors.
194 static int la8_write(struct la8 *la8, uint8_t *buf, int size)
199 g_warning("la8: %s: la8 was NULL", __func__);
204 g_warning("la8: %s: la8->ftdic was NULL", __func__);
209 g_warning("la8: %s: buf was NULL", __func__);
214 g_warning("la8: %s: size was < 0", __func__);
218 bytes_written = ftdi_write_data(la8->ftdic, buf, size);
220 if (bytes_written < 0) {
221 g_warning("la8: %s: ftdi_write_data: (%d) %s", __func__,
222 bytes_written, ftdi_get_error_string(la8->ftdic));
223 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
224 } else if (bytes_written != size) {
225 g_warning("la8: %s: bytes to write: %d, bytes written: %d",
226 __func__, size, bytes_written);
227 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
230 return bytes_written;
234 * Read a certain amount of bytes from the LA8's FTDI device.
236 * @param la8 The LA8 struct containing private per-device-instance data.
237 * @param buf The buffer where the received data will be stored.
238 * @param size The number of bytes to read.
239 * @return The number of bytes read, or a negative value upon errors.
241 static int la8_read(struct la8 *la8, uint8_t *buf, int size)
246 g_warning("la8: %s: la8 was NULL", __func__);
251 g_warning("la8: %s: la8->ftdic was NULL", __func__);
256 g_warning("la8: %s: buf was NULL", __func__);
261 g_warning("la8: %s: size was <= 0", __func__);
265 bytes_read = ftdi_read_data(la8->ftdic, buf, size);
267 if (bytes_read < 0) {
268 g_warning("la8: %s: ftdi_read_data: (%d) %s", __func__,
269 bytes_read, ftdi_get_error_string(la8->ftdic));
270 } else if (bytes_read != size) {
271 // g_warning("la8: %s: bytes to read: %d, bytes read: %d",
272 // __func__, size, bytes_read);
278 static int la8_close(struct la8 *la8)
283 g_warning("la8: %s: la8 was NULL", __func__);
288 g_warning("la8: %s: la8->ftdic was NULL", __func__);
292 if ((ret = ftdi_usb_close(la8->ftdic)) < 0) {
293 g_warning("la8: %s: ftdi_usb_close: (%d) %s",
294 __func__, ret, ftdi_get_error_string(la8->ftdic));
301 * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic.
303 * @param la8 The LA8 struct containing private per-device-instance data.
304 * @return SR_OK upon success, SR_ERR upon failure.
306 static int la8_close_usb_reset_sequencer(struct la8 *la8)
308 /* Magic sequence of bytes for resetting the LA8 sequencer logic. */
309 uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01};
312 g_debug("la8: entering %s", __func__);
315 g_warning("la8: %s: la8 was NULL", __func__);
320 g_warning("la8: %s: la8->ftdic was NULL", __func__);
324 if (la8->ftdic->usb_dev) {
325 /* Reset the LA8 sequencer logic, then wait 100ms. */
326 g_debug("la8: resetting sequencer logic");
327 (void) la8_write(la8, buf, 8); /* Ignore errors. */
328 g_usleep(100 * 1000);
330 /* Purge FTDI buffers, then reset and close the FTDI device. */
331 g_debug("la8: purging buffers, resetting+closing FTDI device");
333 /* Log errors, but ignore them (i.e., don't abort). */
334 if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0)
335 g_warning("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
336 __func__, ret, ftdi_get_error_string(la8->ftdic));
337 if ((ret = ftdi_usb_reset(la8->ftdic)) < 0)
338 g_warning("la8: %s: ftdi_usb_reset: (%d) %s", __func__,
339 ret, ftdi_get_error_string(la8->ftdic));
340 if ((ret = ftdi_usb_close(la8->ftdic)) < 0)
341 g_warning("la8: %s: ftdi_usb_close: (%d) %s", __func__,
342 ret, ftdi_get_error_string(la8->ftdic));
344 g_debug("la8: %s: usb_dev was NULL, nothing to do", __func__);
347 ftdi_free(la8->ftdic); /* Returns void. */
354 * Reset the ChronoVu LA8.
356 * The LA8 must be reset after a failed read/write operation or upon timeouts.
358 * @param la8 The LA8 struct containing private per-device-instance data.
359 * @return SR_OK upon success, SR_ERR upon failure.
361 static int la8_reset(struct la8 *la8)
368 g_warning("la8: %s: la8 was NULL", __func__);
373 g_warning("la8: %s: la8->ftdic was NULL", __func__);
377 g_debug("la8: resetting the device");
380 * Purge pending read data from the FTDI hardware FIFO until
381 * no more data is left, or a timeout occurs (after 20s).
383 done = 20 + time(NULL);
385 /* TODO: Ignore errors? Check for < 0 at least! */
386 bytes_read = la8_read(la8, (uint8_t *)&buf, 4096);
388 } while ((done > now) && (bytes_read > 0));
390 /* Reset the LA8 sequencer logic and close the USB port. */
391 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
393 g_debug("la8: device reset finished");
398 static int hw_init(const char *deviceinfo)
401 struct sr_device_instance *sdi;
404 g_debug("la8: entering %s", __func__);
406 /* Avoid compiler errors. */
407 deviceinfo = deviceinfo;
409 /* Allocate memory for our private driver context. */
410 if (!(la8 = malloc(sizeof(struct la8)))) {
411 g_warning("la8: %s: struct la8 malloc failed", __func__);
413 goto err_free_nothing;
416 /* Set some sane defaults. */
418 la8->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
420 la8->limit_samples = 0;
421 la8->num_probes = NUM_PROBES;
422 la8->session_id = NULL;
423 la8->mangled_buf = NULL;
424 la8->final_buf = NULL;
425 la8->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
426 la8->trigger_mask = 0x00; /* All probes are "don't care". */
427 la8->trigger_timeout = 10; /* Default to 10s trigger timeout. */
429 la8->block_counter = 0;
430 la8->divcount = 0; /* 10ns sample period == 100MHz samplerate */
432 /* Allocate memory for the raw (mangled) data from the LA8. */
433 if (!(la8->mangled_buf = malloc(SDRAM_SIZE))) {
434 g_warning("la8: %s: mangled_buf malloc failed", __func__);
439 /* Allocate memory where we'll store the de-mangled data. */
440 if (!(la8->final_buf = malloc(SDRAM_SIZE))) {
441 g_warning("la8: %s: final_buf malloc failed", __func__);
443 goto err_free_mangled_buf;
446 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
447 if (!(la8->ftdic = ftdi_new())) {
448 g_warning("la8: %s: ftdi_new failed", __func__);
449 ret = SR_ERR; /* TODO: More specific error? */
450 goto err_free_final_buf;
453 /* Check for the device and temporarily open it. */
454 if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID,
455 USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
456 g_warning("la8: %s: ftdi_usb_open_desc: (%d) %s",
457 __func__, ret, ftdi_get_error_string(la8->ftdic));
458 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
459 ret = SR_ERR; /* TODO: More specific error? */
462 g_debug("la8: found device");
464 /* Register the device with libsigrok. */
465 sdi = sr_device_instance_new(0, SR_ST_INITIALIZING,
466 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
468 g_warning("la8: %s: sr_device_instance_new failed", __func__);
469 ret = SR_ERR; /* TODO: More specific error? */
470 goto err_close_ftdic;
475 device_instances = g_slist_append(device_instances, sdi);
477 g_debug("la8: %s finished successfully", __func__);
479 /* Close device. We'll reopen it again when we need it. */
480 (void) la8_close(la8); /* Log, but ignore errors. */
482 // return SR_OK; /* TODO */
486 (void) la8_close(la8); /* Log, but ignore errors. */
490 free(la8->final_buf);
491 err_free_mangled_buf:
492 free(la8->mangled_buf);
496 // return ret; /* TODO */
500 static int hw_opendev(int device_index)
503 struct sr_device_instance *sdi;
506 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
507 g_warning("la8: %s: sdi was NULL", __func__);
511 if (!(la8 = sdi->priv)) {
512 g_warning("la8: %s: sdi->priv was NULL", __func__);
516 g_debug("la8: opening device");
518 /* Open the device. */
519 if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID,
520 USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
521 g_warning("la8: %s: ftdi_usb_open_desc: (%d) %s",
522 __func__, ret, ftdi_get_error_string(la8->ftdic));
523 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
526 g_debug("la8: device opened successfully");
528 /* Purge RX/TX buffers in the FTDI chip. */
529 if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0) {
530 g_warning("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
531 __func__, ret, ftdi_get_error_string(la8->ftdic));
532 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
533 goto err_opendev_close_ftdic;
535 g_debug("la8: FTDI buffers purged successfully");
537 /* Enable flow control in the FTDI chip. */
538 if ((ret = ftdi_setflowctrl(la8->ftdic, SIO_RTS_CTS_HS)) < 0) {
539 g_warning("la8: %s: ftdi_setflowcontrol: (%d) %s",
540 __func__, ret, ftdi_get_error_string(la8->ftdic));
541 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
542 goto err_opendev_close_ftdic;
544 g_debug("la8: FTDI flow control enabled successfully");
547 g_usleep(100 * 1000);
549 sdi->status = SR_ST_ACTIVE;
553 err_opendev_close_ftdic:
554 (void) la8_close(la8); /* Log, but ignore errors. */
558 static int set_samplerate(struct sr_device_instance *sdi, uint64_t samplerate)
563 g_warning("la8: %s: sdi was NULL", __func__);
567 if (!(la8 = sdi->priv)) {
568 g_warning("la8: %s: sdi->priv was NULL", __func__);
572 g_debug("la8: setting samplerate");
574 fill_supported_samplerates_if_needed();
576 /* Check if this is a samplerate supported by the hardware. */
577 if (!is_valid_samplerate(samplerate))
580 /* Set the new samplerate. */
581 la8->cur_samplerate = samplerate;
583 g_debug("la8: samplerate set to %" PRIu64 "Hz", la8->cur_samplerate);
588 static void hw_closedev(int device_index)
590 struct sr_device_instance *sdi;
593 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
594 g_warning("la8: %s: sdi was NULL", __func__);
598 if (!(la8 = sdi->priv)) {
599 g_warning("la8: %s: sdi->priv was NULL", __func__);
603 g_debug("la8: closing device");
605 if (sdi->status == SR_ST_ACTIVE) {
606 g_debug("la8: %s: status ACTIVE, closing device", __func__);
607 /* TODO: Handle or ignore errors here? */
608 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
610 g_debug("la8: %s: status not ACTIVE, nothing to do", __func__);
613 sdi->status = SR_ST_INACTIVE;
616 static void hw_cleanup(void)
619 struct sr_device_instance *sdi;
621 g_debug("la8: entering %s", __func__);
623 /* Properly close all devices. */
624 for (l = device_instances; l; l = l->next) {
625 if ((sdi = l->data) == NULL) {
626 g_warning("la8: %s: sdi was NULL", __func__);
629 if (sdi->priv != NULL)
632 g_warning("la8: %s: sdi->priv was NULL", __func__);
633 sr_device_instance_free(sdi); /* Returns void. */
635 g_slist_free(device_instances); /* Returns void. */
636 device_instances = NULL;
639 static void *hw_get_device_info(int device_index, int device_info_id)
641 struct sr_device_instance *sdi;
645 g_debug("la8: entering %s", __func__);
647 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
648 g_warning("la8: %s: sdi was NULL", __func__);
652 if (!(la8 = sdi->priv)) {
653 g_warning("la8: %s: sdi->priv was NULL", __func__);
657 switch (device_info_id) {
661 case SR_DI_NUM_PROBES:
662 info = GINT_TO_POINTER(NUM_PROBES);
664 case SR_DI_SAMPLERATES:
665 fill_supported_samplerates_if_needed();
668 case SR_DI_TRIGGER_TYPES:
669 info = (char *)TRIGGER_TYPES;
671 case SR_DI_CUR_SAMPLERATE:
672 info = &la8->cur_samplerate;
675 /* Unknown device info ID, return NULL. */
676 g_warning("la8: %s: Unknown device info ID", __func__);
684 static int hw_get_status(int device_index)
686 struct sr_device_instance *sdi;
688 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
689 g_warning("la8: %s: sdi was NULL, device not found", __func__);
690 return SR_ST_NOT_FOUND;
693 g_debug("la8: %s: returning status %d", __func__, sdi->status);
698 static int *hw_get_capabilities(void)
700 g_debug("la8: entering %s", __func__);
705 static int hw_set_configuration(int device_index, int capability, void *value)
707 struct sr_device_instance *sdi;
710 g_debug("la8: entering %s", __func__);
712 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
713 g_warning("la8: %s: sdi was NULL", __func__);
717 if (!(la8 = sdi->priv)) {
718 g_warning("la8: %s: sdi->priv was NULL", __func__);
722 switch (capability) {
723 case SR_HWCAP_SAMPLERATE:
724 if (set_samplerate(sdi, *(uint64_t *)value) == SR_ERR)
726 g_debug("la8: SAMPLERATE = %" PRIu64, la8->cur_samplerate);
728 case SR_HWCAP_PROBECONFIG:
729 /* Nothing to do, but this entry must exist. Fix this. */
731 g_debug("la8: %s: SR_HWCAP_PROBECONFIG called", __func__);
734 case SR_HWCAP_LIMIT_MSEC:
735 if (*(uint64_t *)value == 0) {
736 g_warning("la8: %s: LIMIT_MSEC can't be 0", __func__);
739 la8->limit_msec = *(uint64_t *)value;
740 g_debug("la8: LIMIT_MSEC = %" PRIu64, la8->limit_msec);
742 case SR_HWCAP_LIMIT_SAMPLES:
743 if (*(uint64_t *)value < MIN_NUM_SAMPLES) {
744 g_warning("la8: %s: LIMIT_SAMPLES too small", __func__);
747 la8->limit_samples = *(uint64_t *)value;
748 g_debug("la8: LIMIT_SAMPLES = %" PRIu64, la8->limit_samples);
751 /* Unknown capability, return SR_ERR. */
752 g_warning("la8: %s: Unknown capability", __func__);
761 * Get a block of 4096 bytes of data from the LA8.
763 * @param la8 The LA8 struct containing private per-device-instance data.
764 * @return SR_OK upon success, or SR_ERR upon errors.
766 static int la8_read_block(struct la8 *la8)
768 int i, byte_offset, m, mi, p, index, bytes_read;
772 g_warning("la8: %s: la8 was NULL", __func__);
777 g_warning("la8: %s: la8->ftdic was NULL", __func__);
781 // g_debug("la8: %s: reading block %d", __func__, la8->block_counter);
783 bytes_read = la8_read(la8, la8->mangled_buf, 4096);
785 /* If first block read got 0 bytes, retry until success or timeout. */
786 if ((bytes_read == 0) && (la8->block_counter == 0)) {
788 // g_debug("la8: %s: reading block 0 again", __func__);
789 bytes_read = la8_read(la8, la8->mangled_buf, 4096);
790 /* TODO: How to handle read errors here? */
792 } while ((la8->done > now) && (bytes_read == 0));
795 /* Check if block read was successful or a timeout occured. */
796 if (bytes_read != 4096) {
797 g_warning("la8: %s: trigger timed out", __func__);
798 (void) la8_reset(la8); /* Ignore errors. */
802 /* De-mangle the data. */
803 // g_debug("la8: de-mangling samples of block %d", la8->block_counter);
804 byte_offset = la8->block_counter * 4096;
805 m = byte_offset / (1024 * 1024);
806 mi = m * (1024 * 1024);
807 for (i = 0; i < 4096; i++) {
809 index = m * 2 + (((byte_offset + i) - mi) / 2) * 16;
810 index += (la8->divcount == 0) ? p : (1 - p);
811 la8->final_buf[index] = la8->mangled_buf[i];
817 static int receive_data(int fd, int revents, void *user_data)
820 struct sr_device_instance *sdi;
821 struct sr_datafeed_packet packet;
824 /* Avoid compiler errors. */
828 if (!(sdi = user_data)) {
829 g_warning("la8: %s: user_data was NULL", __func__);
833 if (!(la8 = sdi->priv)) {
834 g_warning("la8: %s: sdi->priv was NULL", __func__);
838 /* Get one block of data (4096 bytes). */
839 if ((ret = la8_read_block(la8)) < 0) {
840 g_warning("la8: %s: la8_read_block error: %d", __func__, ret);
844 /* We need to get exactly 2048 blocks (i.e. 8MB) of data. */
845 if (la8->block_counter != 2047) {
846 la8->block_counter++;
850 g_debug("la8: sampling finished, sending data to session bus now");
852 /* All data was received and demangled, send it to the session bus. */
853 for (i = 0; i < 2048; i++) {
854 /* Send a 4096 byte SR_DF_LOGIC packet to the session bus. */
855 // g_debug("la8: %s: sending SR_DF_LOGIC packet", __func__);
856 packet.type = SR_DF_LOGIC;
857 packet.length = 4096;
859 packet.payload = la8->final_buf + (i * 4096);
860 sr_session_bus(la8->session_id, &packet);
863 hw_stop_acquisition(sdi->index, user_data);
865 // return FALSE; /* FIXME? */
869 static int hw_start_acquisition(int device_index, gpointer session_device_id)
871 struct sr_device_instance *sdi;
873 struct sr_datafeed_packet packet;
874 struct sr_datafeed_header header;
878 g_debug("la8: entering %s", __func__);
880 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
881 g_warning("la8: %s: sdi was NULL", __func__);
885 if (!(la8 = sdi->priv)) {
886 g_warning("la8: %s: sdi->priv was NULL", __func__);
891 g_warning("la8: %s: la8->ftdic was NULL", __func__);
895 la8->divcount = samplerate_to_divcount(la8->cur_samplerate);
896 if (la8->divcount == 0xff) {
897 g_warning("la8: %s: invalid divcount/samplerate", __func__);
901 /* Fill acquisition parameters into buf[]. */
902 buf[0] = la8->divcount;
903 buf[1] = 0xff; /* This byte must always be 0xff. */
904 buf[2] = la8->trigger_pattern;
905 buf[3] = la8->trigger_mask;
907 /* Start acquisition. */
908 bytes_written = la8_write(la8, buf, 4);
910 if (bytes_written < 0) {
911 g_warning("la8: acquisition failed to start");
913 } else if (bytes_written != 4) {
914 g_warning("la8: acquisition failed to start");
915 return SR_ERR; /* TODO: Other error and return code? */
918 g_debug("la8: acquisition started successfully");
920 la8->session_id = session_device_id;
922 /* Send header packet to the session bus. */
923 g_debug("la8: %s: sending SR_DF_HEADER", __func__);
924 packet.type = SR_DF_HEADER;
925 packet.length = sizeof(struct sr_datafeed_header);
927 packet.payload = &header;
928 header.feed_version = 1;
929 gettimeofday(&header.starttime, NULL);
930 header.samplerate = la8->cur_samplerate;
931 header.protocol_id = SR_PROTO_RAW;
932 header.num_logic_probes = la8->num_probes;
933 header.num_analog_probes = 0;
934 sr_session_bus(session_device_id, &packet);
936 /* Time when we should be done (for detecting trigger timeouts). */
937 la8->done = (la8->divcount + 1) * 0.08388608 + time(NULL)
938 + la8->trigger_timeout;
939 la8->block_counter = 0;
941 /* Hook up a dummy handler to receive data from the LA8. */
942 sr_source_add(-1, G_IO_IN, 0, receive_data, sdi);
947 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
949 struct sr_device_instance *sdi;
951 struct sr_datafeed_packet packet;
953 g_debug("la8: stopping acquisition");
955 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
956 g_warning("la8: %s: sdi was NULL", __func__);
960 if (!(la8 = sdi->priv)) {
961 g_warning("la8: %s: sdi->priv was NULL", __func__);
965 /* Reset the LA8 sequencer and close the device. */
966 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
968 /* Send end packet to the session bus. */
969 g_debug("la8: %s: sending SR_DF_END", __func__);
970 packet.type = SR_DF_END;
973 packet.payload = NULL;
974 sr_session_bus(session_device_id, &packet);
977 struct sr_device_plugin chronovu_la8_plugin_info = {
978 .name = "chronovu-la8",
979 .longname = "ChronoVu LA8",
982 .cleanup = hw_cleanup,
984 .close = hw_closedev,
985 .get_device_info = hw_get_device_info,
986 .get_status = hw_get_status,
987 .get_capabilities = hw_get_capabilities,
988 .set_configuration = hw_set_configuration,
989 .start_acquisition = hw_start_acquisition,
990 .stop_acquisition = hw_stop_acquisition,