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
26 #include "sigrok-internal.h"
28 #define USB_VENDOR_ID 0x0403
29 #define USB_PRODUCT_ID 0x6001
30 #define USB_DESCRIPTION "ChronoVu LA8"
31 #define USB_VENDOR_NAME "ChronoVu"
32 #define USB_MODEL_NAME "LA8"
33 #define USB_MODEL_VERSION ""
36 #define TRIGGER_TYPES "01"
37 #define SDRAM_SIZE (8 * 1024 * 1024)
38 #define MIN_NUM_SAMPLES 1
40 #define BS 4096 /* Block size */
41 #define NUM_BLOCKS 2048 /* Number of blocks */
43 static GSList *device_instances = NULL;
45 static const char *probe_names[NUM_PROBES + 1] = {
58 /** FTDI device context (used by libftdi). */
59 struct ftdi_context *ftdic;
61 /** The currently configured samplerate of the device. */
62 uint64_t cur_samplerate;
64 /** The current sampling limit (in ms). */
67 /** The current sampling limit (in number of samples). */
68 uint64_t limit_samples;
74 * A buffer containing some (mangled) samples from the device.
75 * Format: Pretty mangled-up (due to hardware reasons), see code.
77 uint8_t mangled_buf[BS];
80 * An 8MB buffer where we'll store the de-mangled samples.
81 * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0.
86 * Trigger pattern (MSB = channel 7, LSB = channel 0).
87 * A 1 bit matches a high signal, 0 matches a low signal on a probe.
88 * Only low/high triggers (but not e.g. rising/falling) are supported.
90 uint8_t trigger_pattern;
93 * Trigger mask (MSB = channel 7, LSB = channel 0).
94 * A 1 bit means "must match trigger_pattern", 0 means "don't care".
98 /** Time (in seconds) before the trigger times out. */
99 uint64_t trigger_timeout;
101 /** Tells us whether an SR_DF_TRIGGER packet was already sent. */
107 /** Counter/index for the data block to be read. */
110 /** The divcount value (determines the sample period) for the LA8. */
114 /* This will be initialized via hw_get_device_info()/SR_DI_SAMPLERATES. */
115 static uint64_t supported_samplerates[255 + 1] = { 0 };
118 * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
119 * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
121 static struct sr_samplerates samplerates = {
125 .list = supported_samplerates,
128 /* Note: Continuous sampling is not supported by the hardware. */
129 static int capabilities[] = {
130 SR_HWCAP_LOGIC_ANALYZER,
132 SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */
133 SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
137 /* Function prototypes. */
138 static int la8_close_usb_reset_sequencer(struct la8 *la8);
139 static int hw_stop_acquisition(int device_index, gpointer session_data);
140 static int la8_reset(struct la8 *la8);
142 static void fill_supported_samplerates_if_needed(void)
146 /* Do nothing if supported_samplerates[] is already filled. */
147 if (supported_samplerates[0] != 0)
150 /* Fill supported_samplerates[] with the proper values. */
151 for (i = 0; i < 255; i++)
152 supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
153 supported_samplerates[255] = 0;
157 * Check if the given samplerate is supported by the LA8 hardware.
159 * @param samplerate The samplerate (in Hz) to check.
160 * @return 1 if the samplerate is supported/valid, 0 otherwise.
162 static int is_valid_samplerate(uint64_t samplerate)
166 fill_supported_samplerates_if_needed();
168 for (i = 0; i < 255; i++) {
169 if (supported_samplerates[i] == samplerate)
173 sr_err("la8: %s: invalid samplerate (%" PRIu64 "Hz)",
174 __func__, samplerate);
180 * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
182 * LA8 hardware: sample period = (divcount + 1) * 10ns.
183 * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
184 * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
186 * @param samplerate The samplerate in Hz.
187 * @return The divcount value as needed by the hardware, or 0xff upon errors.
189 static uint8_t samplerate_to_divcount(uint64_t samplerate)
191 if (samplerate == 0) {
192 sr_err("la8: %s: samplerate was 0", __func__);
196 if (!is_valid_samplerate(samplerate)) {
197 sr_err("la8: %s: can't get divcount, samplerate invalid",
202 return (SR_MHZ(100) / samplerate) - 1;
206 * Write data of a certain length to the LA8's FTDI device.
208 * @param la8 The LA8 struct containing private per-device-instance data.
209 * @param buf The buffer containing the data to write.
210 * @param size The number of bytes to write.
211 * @return The number of bytes written, or a negative value upon errors.
213 static int la8_write(struct la8 *la8, uint8_t *buf, int size)
218 sr_err("la8: %s: la8 was NULL", __func__);
223 sr_err("la8: %s: la8->ftdic was NULL", __func__);
228 sr_err("la8: %s: buf was NULL", __func__);
233 sr_err("la8: %s: size was < 0", __func__);
237 bytes_written = ftdi_write_data(la8->ftdic, buf, size);
239 if (bytes_written < 0) {
240 sr_err("la8: %s: ftdi_write_data: (%d) %s", __func__,
241 bytes_written, ftdi_get_error_string(la8->ftdic));
242 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
243 } else if (bytes_written != size) {
244 sr_err("la8: %s: bytes to write: %d, bytes written: %d",
245 __func__, size, bytes_written);
246 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
249 return bytes_written;
253 * Read a certain amount of bytes from the LA8's FTDI device.
255 * @param la8 The LA8 struct containing private per-device-instance data.
256 * @param buf The buffer where the received data will be stored.
257 * @param size The number of bytes to read.
258 * @return The number of bytes read, or a negative value upon errors.
260 static int la8_read(struct la8 *la8, uint8_t *buf, int size)
265 sr_err("la8: %s: la8 was NULL", __func__);
270 sr_err("la8: %s: la8->ftdic was NULL", __func__);
275 sr_err("la8: %s: buf was NULL", __func__);
280 sr_err("la8: %s: size was <= 0", __func__);
284 bytes_read = ftdi_read_data(la8->ftdic, buf, size);
286 if (bytes_read < 0) {
287 sr_err("la8: %s: ftdi_read_data: (%d) %s", __func__,
288 bytes_read, ftdi_get_error_string(la8->ftdic));
289 } else if (bytes_read != size) {
290 // sr_err("la8: %s: bytes to read: %d, bytes read: %d",
291 // __func__, size, bytes_read);
297 static int la8_close(struct la8 *la8)
302 sr_err("la8: %s: la8 was NULL", __func__);
307 sr_err("la8: %s: la8->ftdic was NULL", __func__);
311 if ((ret = ftdi_usb_close(la8->ftdic)) < 0) {
312 sr_err("la8: %s: ftdi_usb_close: (%d) %s",
313 __func__, ret, ftdi_get_error_string(la8->ftdic));
320 * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic.
322 * @param la8 The LA8 struct containing private per-device-instance data.
323 * @return SR_OK upon success, SR_ERR upon failure.
325 static int la8_close_usb_reset_sequencer(struct la8 *la8)
327 /* Magic sequence of bytes for resetting the LA8 sequencer logic. */
328 uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01};
332 sr_err("la8: %s: la8 was NULL", __func__);
337 sr_err("la8: %s: la8->ftdic was NULL", __func__);
341 if (la8->ftdic->usb_dev) {
342 /* Reset the LA8 sequencer logic, then wait 100ms. */
343 sr_dbg("la8: resetting sequencer logic");
344 (void) la8_write(la8, buf, 8); /* Ignore errors. */
345 g_usleep(100 * 1000);
347 /* Purge FTDI buffers, then reset and close the FTDI device. */
348 sr_dbg("la8: purging buffers, resetting+closing FTDI device");
350 /* Log errors, but ignore them (i.e., don't abort). */
351 if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0)
352 sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
353 __func__, ret, ftdi_get_error_string(la8->ftdic));
354 if ((ret = ftdi_usb_reset(la8->ftdic)) < 0)
355 sr_err("la8: %s: ftdi_usb_reset: (%d) %s", __func__,
356 ret, ftdi_get_error_string(la8->ftdic));
357 if ((ret = ftdi_usb_close(la8->ftdic)) < 0)
358 sr_err("la8: %s: ftdi_usb_close: (%d) %s", __func__,
359 ret, ftdi_get_error_string(la8->ftdic));
362 ftdi_free(la8->ftdic); /* Returns void. */
369 * Reset the ChronoVu LA8.
371 * The LA8 must be reset after a failed read/write operation or upon timeouts.
373 * @param la8 The LA8 struct containing private per-device-instance data.
374 * @return SR_OK upon success, SR_ERR upon failure.
376 static int la8_reset(struct la8 *la8)
383 sr_err("la8: %s: la8 was NULL", __func__);
388 sr_err("la8: %s: la8->ftdic was NULL", __func__);
392 sr_dbg("la8: resetting the device");
395 * Purge pending read data from the FTDI hardware FIFO until
396 * no more data is left, or a timeout occurs (after 20s).
398 done = 20 + time(NULL);
400 /* TODO: Ignore errors? Check for < 0 at least! */
401 bytes_read = la8_read(la8, (uint8_t *)&buf, BS);
403 } while ((done > now) && (bytes_read > 0));
405 /* Reset the LA8 sequencer logic and close the USB port. */
406 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
408 sr_dbg("la8: device reset finished");
413 static int configure_probes(struct la8 *la8, GSList *probes)
415 struct sr_probe *probe;
420 la8->trigger_pattern = 0;
421 la8->trigger_mask = 0; /* Default to "don't care" for all probes. */
423 for (l = probes; l; l = l->next) {
424 probe = (struct sr_probe *)l->data;
427 sr_err("la8: %s: probe was NULL", __func__);
431 /* Skip disabled probes. */
435 /* Skip (enabled) probes with no configured trigger. */
439 /* Note: Must only be run if probe->trigger != NULL. */
440 if (probe->index < 0 || probe->index > 7) {
441 sr_err("la8: %s: invalid probe index %d, must be "
442 "between 0 and 7", __func__, probe->index);
446 probe_bit = (1 << (probe->index - 1));
448 /* Configure the probe's trigger mask and trigger pattern. */
449 for (tc = probe->trigger; tc && *tc; tc++) {
450 la8->trigger_mask |= probe_bit;
452 /* Sanity check, LA8 only supports low/high trigger. */
453 if (*tc != '0' && *tc != '1') {
454 sr_err("la8: %s: invalid trigger '%c', only "
455 "'0'/'1' supported", __func__, *tc);
460 la8->trigger_pattern |= probe_bit;
464 sr_dbg("la8: %s: trigger_mask = 0x%x, trigger_pattern = 0x%x",
465 __func__, la8->trigger_mask, la8->trigger_pattern);
470 static int hw_init(const char *deviceinfo)
473 struct sr_device_instance *sdi;
476 /* Avoid compiler errors. */
479 /* Allocate memory for our private driver context. */
480 if (!(la8 = g_try_malloc(sizeof(struct la8)))) {
481 sr_err("la8: %s: struct la8 malloc failed", __func__);
482 goto err_free_nothing;
485 /* Set some sane defaults. */
487 la8->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
489 la8->limit_samples = 0;
490 la8->session_id = NULL;
491 memset(la8->mangled_buf, 0, BS);
492 la8->final_buf = NULL;
493 la8->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
494 la8->trigger_mask = 0x00; /* All probes are "don't care". */
495 la8->trigger_timeout = 10; /* Default to 10s trigger timeout. */
496 la8->trigger_found = 0;
498 la8->block_counter = 0;
499 la8->divcount = 0; /* 10ns sample period == 100MHz samplerate */
501 /* Allocate memory where we'll store the de-mangled data. */
502 if (!(la8->final_buf = g_try_malloc(SDRAM_SIZE))) {
503 sr_err("la8: %s: final_buf malloc failed", __func__);
507 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
508 if (!(la8->ftdic = ftdi_new())) {
509 sr_err("la8: %s: ftdi_new failed", __func__);
510 goto err_free_final_buf;
513 /* Check for the device and temporarily open it. */
514 if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID,
515 USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
516 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
519 sr_dbg("la8: found device");
521 /* Register the device with libsigrok. */
522 sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
523 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
525 sr_err("la8: %s: sr_device_instance_new failed", __func__);
526 goto err_close_ftdic;
531 device_instances = g_slist_append(device_instances, sdi);
533 sr_spew("la8: %s finished successfully", __func__);
535 /* Close device. We'll reopen it again when we need it. */
536 (void) la8_close(la8); /* Log, but ignore errors. */
541 (void) la8_close(la8); /* Log, but ignore errors. */
543 free(la8->ftdic); /* NOT g_free()! */
545 g_free(la8->final_buf);
553 static int hw_opendev(int device_index)
556 struct sr_device_instance *sdi;
559 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
560 sr_err("la8: %s: sdi was NULL", __func__);
561 return SR_ERR; /* TODO: SR_ERR_ARG? */
564 if (!(la8 = sdi->priv)) {
565 sr_err("la8: %s: sdi->priv was NULL", __func__);
566 return SR_ERR; /* TODO: SR_ERR_ARG? */
569 sr_dbg("la8: opening device");
571 /* Open the device. */
572 if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID,
573 USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
574 sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
575 __func__, ret, ftdi_get_error_string(la8->ftdic));
576 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
579 sr_dbg("la8: device opened successfully");
581 /* Purge RX/TX buffers in the FTDI chip. */
582 if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0) {
583 sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
584 __func__, ret, ftdi_get_error_string(la8->ftdic));
585 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
586 goto err_opendev_close_ftdic;
588 sr_dbg("la8: FTDI buffers purged successfully");
590 /* Enable flow control in the FTDI chip. */
591 if ((ret = ftdi_setflowctrl(la8->ftdic, SIO_RTS_CTS_HS)) < 0) {
592 sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
593 __func__, ret, ftdi_get_error_string(la8->ftdic));
594 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
595 goto err_opendev_close_ftdic;
597 sr_dbg("la8: FTDI flow control enabled successfully");
600 g_usleep(100 * 1000);
602 sdi->status = SR_ST_ACTIVE;
606 err_opendev_close_ftdic:
607 (void) la8_close(la8); /* Log, but ignore errors. */
611 static int set_samplerate(struct sr_device_instance *sdi, uint64_t samplerate)
616 sr_err("la8: %s: sdi was NULL", __func__);
620 if (!(la8 = sdi->priv)) {
621 sr_err("la8: %s: sdi->priv was NULL", __func__);
625 sr_spew("la8: setting samplerate");
627 fill_supported_samplerates_if_needed();
629 /* Check if this is a samplerate supported by the hardware. */
630 if (!is_valid_samplerate(samplerate))
633 /* Set the new samplerate. */
634 la8->cur_samplerate = samplerate;
636 sr_dbg("la8: samplerate set to %" PRIu64 "Hz", la8->cur_samplerate);
641 static int hw_closedev(int device_index)
643 struct sr_device_instance *sdi;
646 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
647 sr_err("la8: %s: sdi was NULL", __func__);
648 return SR_ERR; /* TODO: SR_ERR_ARG? */
651 if (!(la8 = sdi->priv)) {
652 sr_err("la8: %s: sdi->priv was NULL", __func__);
653 return SR_ERR; /* TODO: SR_ERR_ARG? */
656 sr_dbg("la8: closing device");
658 if (sdi->status == SR_ST_ACTIVE) {
659 sr_dbg("la8: %s: status ACTIVE, closing device", __func__);
660 /* TODO: Really ignore errors here, or return SR_ERR? */
661 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
663 sr_spew("la8: %s: status not ACTIVE, nothing to do", __func__);
666 sdi->status = SR_ST_INACTIVE;
668 sr_dbg("la8: %s: freeing sample buffers", __func__);
669 g_free(la8->final_buf);
674 static int hw_cleanup(void)
677 struct sr_device_instance *sdi;
680 /* Properly close all devices. */
681 for (l = device_instances; l; l = l->next) {
682 if (!(sdi = l->data)) {
683 /* Log error, but continue cleaning up the rest. */
684 sr_err("la8: %s: sdi was NULL, continuing", __func__);
688 sr_dev_inst_free(sdi); /* Returns void. */
690 g_slist_free(device_instances); /* Returns void. */
691 device_instances = NULL;
696 static void *hw_get_device_info(int device_index, int device_info_id)
698 struct sr_device_instance *sdi;
702 sr_spew("la8: entering %s", __func__);
704 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
705 sr_err("la8: %s: sdi was NULL", __func__);
709 if (!(la8 = sdi->priv)) {
710 sr_err("la8: %s: sdi->priv was NULL", __func__);
714 switch (device_info_id) {
718 case SR_DI_NUM_PROBES:
719 info = GINT_TO_POINTER(NUM_PROBES);
721 case SR_DI_PROBE_NAMES:
724 case SR_DI_SAMPLERATES:
725 fill_supported_samplerates_if_needed();
728 case SR_DI_TRIGGER_TYPES:
729 info = (char *)TRIGGER_TYPES;
731 case SR_DI_CUR_SAMPLERATE:
732 info = &la8->cur_samplerate;
735 /* Unknown device info ID, return NULL. */
736 sr_err("la8: %s: Unknown device info ID", __func__);
744 static int hw_get_status(int device_index)
746 struct sr_device_instance *sdi;
748 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
749 sr_err("la8: %s: sdi was NULL, device not found", __func__);
750 return SR_ST_NOT_FOUND;
753 sr_dbg("la8: %s: returning status %d", __func__, sdi->status);
758 static int *hw_get_capabilities(void)
760 sr_spew("la8: entering %s", __func__);
765 static int hw_set_configuration(int device_index, int capability, void *value)
767 struct sr_device_instance *sdi;
770 sr_spew("la8: entering %s", __func__);
772 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
773 sr_err("la8: %s: sdi was NULL", __func__);
774 return SR_ERR; /* TODO: SR_ERR_ARG? */
777 if (!(la8 = sdi->priv)) {
778 sr_err("la8: %s: sdi->priv was NULL", __func__);
779 return SR_ERR; /* TODO: SR_ERR_ARG? */
782 switch (capability) {
783 case SR_HWCAP_SAMPLERATE:
784 if (set_samplerate(sdi, *(uint64_t *)value) == SR_ERR)
786 sr_dbg("la8: SAMPLERATE = %" PRIu64, la8->cur_samplerate);
788 case SR_HWCAP_PROBECONFIG:
789 if (configure_probes(la8, (GSList *)value) != SR_OK) {
790 sr_err("la8: %s: probe config failed", __func__);
794 case SR_HWCAP_LIMIT_MSEC:
795 if (*(uint64_t *)value == 0) {
796 sr_err("la8: %s: LIMIT_MSEC can't be 0", __func__);
799 la8->limit_msec = *(uint64_t *)value;
800 sr_dbg("la8: LIMIT_MSEC = %" PRIu64, la8->limit_msec);
802 case SR_HWCAP_LIMIT_SAMPLES:
803 if (*(uint64_t *)value < MIN_NUM_SAMPLES) {
804 sr_err("la8: %s: LIMIT_SAMPLES too small", __func__);
807 la8->limit_samples = *(uint64_t *)value;
808 sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, la8->limit_samples);
811 /* Unknown capability, return SR_ERR. */
812 sr_err("la8: %s: Unknown capability", __func__);
821 * Get a block of data from the LA8.
823 * @param la8 The LA8 struct containing private per-device-instance data.
824 * @return SR_OK upon success, or SR_ERR upon errors.
826 static int la8_read_block(struct la8 *la8)
828 int i, byte_offset, m, mi, p, index, bytes_read;
832 sr_err("la8: %s: la8 was NULL", __func__);
837 sr_err("la8: %s: la8->ftdic was NULL", __func__);
841 sr_spew("la8: %s: reading block %d", __func__, la8->block_counter);
843 bytes_read = la8_read(la8, la8->mangled_buf, BS);
845 /* If first block read got 0 bytes, retry until success or timeout. */
846 if ((bytes_read == 0) && (la8->block_counter == 0)) {
848 sr_spew("la8: %s: reading block 0 again", __func__);
849 bytes_read = la8_read(la8, la8->mangled_buf, BS);
850 /* TODO: How to handle read errors here? */
852 } while ((la8->done > now) && (bytes_read == 0));
855 /* Check if block read was successful or a timeout occured. */
856 if (bytes_read != BS) {
857 sr_err("la8: %s: trigger timed out", __func__);
858 (void) la8_reset(la8); /* Ignore errors. */
862 /* De-mangle the data. */
863 sr_spew("la8: de-mangling samples of block %d", la8->block_counter);
864 byte_offset = la8->block_counter * BS;
865 m = byte_offset / (1024 * 1024);
866 mi = m * (1024 * 1024);
867 for (i = 0; i < BS; i++) {
869 index = m * 2 + (((byte_offset + i) - mi) / 2) * 16;
870 index += (la8->divcount == 0) ? p : (1 - p);
871 la8->final_buf[index] = la8->mangled_buf[i];
877 static void send_block_to_session_bus(struct la8 *la8, int block)
880 uint8_t sample, expected_sample;
881 struct sr_datafeed_packet packet;
882 struct sr_datafeed_logic logic;
883 int trigger_point; /* Relative trigger point (in this block). */
885 /* Note: No sanity checks on la8/block, caller is responsible. */
887 /* Check if we can find the trigger condition in this block. */
889 expected_sample = la8->trigger_pattern & la8->trigger_mask;
890 for (i = 0; i < BS; i++) {
891 /* Don't continue if the trigger was found previously. */
892 if (la8->trigger_found)
896 * Also, don't continue if triggers are "don't care", i.e. if
897 * no trigger conditions were specified by the user. In that
898 * case we don't want to send an SR_DF_TRIGGER packet at all.
900 if (la8->trigger_mask == 0x00)
903 sample = *(la8->final_buf + (block * BS) + i);
905 if ((sample & la8->trigger_mask) == expected_sample) {
907 la8->trigger_found = 1;
912 /* If no trigger was found, send one SR_DF_LOGIC packet. */
913 if (trigger_point == -1) {
914 /* Send an SR_DF_LOGIC packet to the session bus. */
915 sr_spew("la8: sending SR_DF_LOGIC packet (%d bytes) for "
916 "block %d", BS, block);
917 packet.type = SR_DF_LOGIC;
918 packet.payload = &logic;
921 logic.data = la8->final_buf + (block * BS);
922 sr_session_bus(la8->session_id, &packet);
927 * We found the trigger, so some special handling is needed. We have
928 * to send an SR_DF_LOGIC packet with the samples before the trigger
929 * (if any), then the SD_DF_TRIGGER packet itself, then another
930 * SR_DF_LOGIC packet with the samples after the trigger (if any).
933 /* TODO: Send SR_DF_TRIGGER packet before or after the actual sample? */
935 /* If at least one sample is located before the trigger... */
936 if (trigger_point > 0) {
937 /* Send pre-trigger SR_DF_LOGIC packet to the session bus. */
938 sr_spew("la8: sending pre-trigger SR_DF_LOGIC packet, "
939 "start = %d, length = %d", block * BS, trigger_point);
940 packet.type = SR_DF_LOGIC;
941 packet.payload = &logic;
942 logic.length = trigger_point;
944 logic.data = la8->final_buf + (block * BS);
945 sr_session_bus(la8->session_id, &packet);
948 /* Send the SR_DF_TRIGGER packet to the session bus. */
949 sr_spew("la8: sending SR_DF_TRIGGER packet, sample = %d",
950 (block * BS) + trigger_point);
951 packet.type = SR_DF_TRIGGER;
952 packet.payload = NULL;
953 sr_session_bus(la8->session_id, &packet);
955 /* If at least one sample is located after the trigger... */
956 if (trigger_point < (BS - 1)) {
957 /* Send post-trigger SR_DF_LOGIC packet to the session bus. */
958 sr_spew("la8: sending post-trigger SR_DF_LOGIC packet, "
959 "start = %d, length = %d",
960 (block * BS) + trigger_point, BS - trigger_point);
961 packet.type = SR_DF_LOGIC;
962 packet.payload = &logic;
963 logic.length = BS - trigger_point;
965 logic.data = la8->final_buf + (block * BS) + trigger_point;
966 sr_session_bus(la8->session_id, &packet);
970 static int receive_data(int fd, int revents, void *session_data)
973 struct sr_device_instance *sdi;
976 /* Avoid compiler errors. */
980 if (!(sdi = session_data)) {
981 sr_err("la8: %s: session_data was NULL", __func__);
985 if (!(la8 = sdi->priv)) {
986 sr_err("la8: %s: sdi->priv was NULL", __func__);
990 /* Get one block of data. */
991 if ((ret = la8_read_block(la8)) < 0) {
992 sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
993 hw_stop_acquisition(sdi->index, session_data);
997 /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
998 if (la8->block_counter != (NUM_BLOCKS - 1)) {
999 la8->block_counter++;
1003 sr_dbg("la8: sampling finished, sending data to session bus now");
1005 /* All data was received and demangled, send it to the session bus. */
1006 for (i = 0; i < NUM_BLOCKS; i++)
1007 send_block_to_session_bus(la8, i);
1009 hw_stop_acquisition(sdi->index, session_data);
1011 // return FALSE; /* FIXME? */
1015 static int hw_start_acquisition(int device_index, gpointer session_data)
1017 struct sr_device_instance *sdi;
1019 struct sr_datafeed_packet packet;
1020 struct sr_datafeed_header header;
1024 sr_spew("la8: entering %s", __func__);
1026 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
1027 sr_err("la8: %s: sdi was NULL", __func__);
1028 return SR_ERR; /* TODO: SR_ERR_ARG? */
1031 if (!(la8 = sdi->priv)) {
1032 sr_err("la8: %s: sdi->priv was NULL", __func__);
1033 return SR_ERR; /* TODO: SR_ERR_ARG? */
1037 sr_err("la8: %s: la8->ftdic was NULL", __func__);
1041 la8->divcount = samplerate_to_divcount(la8->cur_samplerate);
1042 if (la8->divcount == 0xff) {
1043 sr_err("la8: %s: invalid divcount/samplerate", __func__);
1047 /* Fill acquisition parameters into buf[]. */
1048 buf[0] = la8->divcount;
1049 buf[1] = 0xff; /* This byte must always be 0xff. */
1050 buf[2] = la8->trigger_pattern;
1051 buf[3] = la8->trigger_mask;
1053 /* Start acquisition. */
1054 bytes_written = la8_write(la8, buf, 4);
1056 if (bytes_written < 0) {
1057 sr_err("la8: acquisition failed to start");
1059 } else if (bytes_written != 4) {
1060 sr_err("la8: acquisition failed to start");
1061 return SR_ERR; /* TODO: Other error and return code? */
1064 sr_dbg("la8: acquisition started successfully");
1066 la8->session_id = session_data;
1068 /* Send header packet to the session bus. */
1069 sr_dbg("la8: %s: sending SR_DF_HEADER", __func__);
1070 packet.type = SR_DF_HEADER;
1071 packet.payload = &header;
1072 header.feed_version = 1;
1073 gettimeofday(&header.starttime, NULL);
1074 header.samplerate = la8->cur_samplerate;
1075 header.num_logic_probes = NUM_PROBES;
1076 sr_session_bus(session_data, &packet);
1078 /* Time when we should be done (for detecting trigger timeouts). */
1079 la8->done = (la8->divcount + 1) * 0.08388608 + time(NULL)
1080 + la8->trigger_timeout;
1081 la8->block_counter = 0;
1082 la8->trigger_found = 0;
1084 /* Hook up a dummy handler to receive data from the LA8. */
1085 sr_source_add(-1, G_IO_IN, 0, receive_data, sdi);
1090 static int hw_stop_acquisition(int device_index, gpointer session_data)
1092 struct sr_device_instance *sdi;
1094 struct sr_datafeed_packet packet;
1096 sr_dbg("la8: stopping acquisition");
1098 if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
1099 sr_err("la8: %s: sdi was NULL", __func__);
1103 if (!(la8 = sdi->priv)) {
1104 sr_err("la8: %s: sdi->priv was NULL", __func__);
1108 /* Send end packet to the session bus. */
1109 sr_dbg("la8: %s: sending SR_DF_END", __func__);
1110 packet.type = SR_DF_END;
1111 sr_session_bus(session_data, &packet);
1116 SR_PRIV struct sr_device_plugin chronovu_la8_plugin_info = {
1117 .name = "chronovu-la8",
1118 .longname = "ChronoVu LA8",
1121 .cleanup = hw_cleanup,
1122 .opendev = hw_opendev,
1123 .closedev = hw_closedev,
1124 .get_device_info = hw_get_device_info,
1125 .get_status = hw_get_status,
1126 .get_capabilities = hw_get_capabilities,
1127 .set_configuration = hw_set_configuration,
1128 .start_acquisition = hw_start_acquisition,
1129 .stop_acquisition = hw_stop_acquisition,