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 #include <sigrok-internal.h>
26 #define USB_VENDOR_ID 0x0403
27 #define USB_PRODUCT_ID 0x6001
28 #define USB_DESCRIPTION "ChronoVu LA8"
29 #define USB_VENDOR_NAME "ChronoVu"
30 #define USB_MODEL_NAME "LA8"
31 #define USB_MODEL_VERSION ""
34 #define TRIGGER_TYPES "01"
35 #define SDRAM_SIZE (8 * 1024 * 1024)
36 #define MIN_NUM_SAMPLES 1
38 static GSList *device_instances = NULL;
41 /** FTDI device context (used by libftdi). */
42 struct ftdi_context *ftdic;
44 /** The currently configured samplerate of the device. */
45 uint64_t cur_samplerate;
47 /** The current sampling limit (in ms). */
50 /** The current sampling limit (in number of samples). */
51 uint64_t limit_samples;
57 * An 8MB buffer containing the (mangled) samples from the device.
58 * Format: Pretty mangled-up (due to hardware reasons), see code.
63 * An 8MB buffer where we'll store the de-mangled samples.
64 * Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0.
69 * Trigger pattern (MSB = channel 7, LSB = channel 0).
70 * A 1 bit matches a high signal, 0 matches a low signal on a probe.
71 * Only low/high triggers (but not e.g. rising/falling) are supported.
73 uint8_t trigger_pattern;
76 * Trigger mask (MSB = channel 7, LSB = channel 0).
77 * A 1 bit means "must match trigger_pattern", 0 means "don't care".
81 /** Time (in seconds) before the trigger times out. */
82 uint64_t trigger_timeout;
87 /** Counter/index for the data block (0..2047) to be read. */
90 /** The divcount value (determines the sample period) for the LA8. */
94 /* This will be initialized via hw_get_device_info()/SR_DI_SAMPLERATES. */
95 static uint64_t supported_samplerates[255 + 1] = { 0 };
98 * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
99 * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
101 static struct sr_samplerates samplerates = {
105 .list = supported_samplerates,
108 /* Note: Continuous sampling is not supported by the hardware. */
109 static int capabilities[] = {
110 SR_HWCAP_LOGIC_ANALYZER,
112 SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */
113 SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
117 /* Function prototypes. */
118 static int la8_close_usb_reset_sequencer(struct la8 *la8);
119 static void hw_stop_acquisition(int device_index, gpointer session_device_id);
120 static int la8_reset(struct la8 *la8);
122 static void fill_supported_samplerates_if_needed(void)
126 /* Do nothing if supported_samplerates[] is already filled. */
127 if (supported_samplerates[0] != 0)
130 /* Fill supported_samplerates[] with the proper values. */
131 for (i = 0; i < 255; i++)
132 supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
133 supported_samplerates[255] = 0;
137 * Check if the given samplerate is supported by the LA8 hardware.
139 * @param samplerate The samplerate (in Hz) to check.
140 * @return 1 if the samplerate is supported/valid, 0 otherwise.
142 static int is_valid_samplerate(uint64_t samplerate)
146 fill_supported_samplerates_if_needed();
148 for (i = 0; i < 255; i++) {
149 if (supported_samplerates[i] == samplerate)
153 sr_warn("la8: %s: invalid samplerate (%" PRIu64 "Hz)",
154 __func__, samplerate);
160 * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
162 * LA8 hardware: sample period = (divcount + 1) * 10ns.
163 * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
164 * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
166 * @param samplerate The samplerate in Hz.
167 * @return The divcount value as needed by the hardware, or 0xff upon errors.
169 static uint8_t samplerate_to_divcount(uint64_t samplerate)
171 if (samplerate == 0) {
172 sr_err("la8: %s: samplerate was 0", __func__);
176 if (!is_valid_samplerate(samplerate)) {
177 sr_err("la8: %s: can't get divcount, samplerate invalid",
182 return (SR_MHZ(100) / samplerate) - 1;
186 * Write data of a certain length to the LA8's FTDI device.
188 * @param la8 The LA8 struct containing private per-device-instance data.
189 * @param buf The buffer containing the data to write.
190 * @param size The number of bytes to write.
191 * @return The number of bytes written, or a negative value upon errors.
193 static int la8_write(struct la8 *la8, uint8_t *buf, int size)
198 sr_err("la8: %s: la8 was NULL", __func__);
203 sr_err("la8: %s: la8->ftdic was NULL", __func__);
208 sr_err("la8: %s: buf was NULL", __func__);
213 sr_err("la8: %s: size was < 0", __func__);
217 bytes_written = ftdi_write_data(la8->ftdic, buf, size);
219 if (bytes_written < 0) {
220 sr_warn("la8: %s: ftdi_write_data: (%d) %s", __func__,
221 bytes_written, ftdi_get_error_string(la8->ftdic));
222 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
223 } else if (bytes_written != size) {
224 sr_warn("la8: %s: bytes to write: %d, bytes written: %d",
225 __func__, size, bytes_written);
226 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
229 return bytes_written;
233 * Read a certain amount of bytes from the LA8's FTDI device.
235 * @param la8 The LA8 struct containing private per-device-instance data.
236 * @param buf The buffer where the received data will be stored.
237 * @param size The number of bytes to read.
238 * @return The number of bytes read, or a negative value upon errors.
240 static int la8_read(struct la8 *la8, uint8_t *buf, int size)
245 sr_err("la8: %s: la8 was NULL", __func__);
250 sr_err("la8: %s: la8->ftdic was NULL", __func__);
255 sr_err("la8: %s: buf was NULL", __func__);
260 sr_err("la8: %s: size was <= 0", __func__);
264 bytes_read = ftdi_read_data(la8->ftdic, buf, size);
266 if (bytes_read < 0) {
267 sr_warn("la8: %s: ftdi_read_data: (%d) %s", __func__,
268 bytes_read, ftdi_get_error_string(la8->ftdic));
269 } else if (bytes_read != size) {
270 // sr_warn("la8: %s: bytes to read: %d, bytes read: %d",
271 // __func__, size, bytes_read);
277 static int la8_close(struct la8 *la8)
282 sr_err("la8: %s: la8 was NULL", __func__);
287 sr_err("la8: %s: la8->ftdic was NULL", __func__);
291 if ((ret = ftdi_usb_close(la8->ftdic)) < 0) {
292 sr_warn("la8: %s: ftdi_usb_close: (%d) %s",
293 __func__, ret, ftdi_get_error_string(la8->ftdic));
300 * Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic.
302 * @param la8 The LA8 struct containing private per-device-instance data.
303 * @return SR_OK upon success, SR_ERR upon failure.
305 static int la8_close_usb_reset_sequencer(struct la8 *la8)
307 /* Magic sequence of bytes for resetting the LA8 sequencer logic. */
308 uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01};
311 sr_dbg("la8: entering %s", __func__);
314 sr_err("la8: %s: la8 was NULL", __func__);
319 sr_err("la8: %s: la8->ftdic was NULL", __func__);
323 if (la8->ftdic->usb_dev) {
324 /* Reset the LA8 sequencer logic, then wait 100ms. */
325 sr_dbg("la8: resetting sequencer logic");
326 (void) la8_write(la8, buf, 8); /* Ignore errors. */
327 g_usleep(100 * 1000);
329 /* Purge FTDI buffers, then reset and close the FTDI device. */
330 sr_dbg("la8: purging buffers, resetting+closing FTDI device");
332 /* Log errors, but ignore them (i.e., don't abort). */
333 if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0)
334 sr_warn("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
335 __func__, ret, ftdi_get_error_string(la8->ftdic));
336 if ((ret = ftdi_usb_reset(la8->ftdic)) < 0)
337 sr_warn("la8: %s: ftdi_usb_reset: (%d) %s", __func__,
338 ret, ftdi_get_error_string(la8->ftdic));
339 if ((ret = ftdi_usb_close(la8->ftdic)) < 0)
340 sr_warn("la8: %s: ftdi_usb_close: (%d) %s", __func__,
341 ret, ftdi_get_error_string(la8->ftdic));
343 sr_dbg("la8: %s: usb_dev was NULL, nothing to do", __func__);
346 ftdi_free(la8->ftdic); /* Returns void. */
353 * Reset the ChronoVu LA8.
355 * The LA8 must be reset after a failed read/write operation or upon timeouts.
357 * @param la8 The LA8 struct containing private per-device-instance data.
358 * @return SR_OK upon success, SR_ERR upon failure.
360 static int la8_reset(struct la8 *la8)
367 sr_err("la8: %s: la8 was NULL", __func__);
372 sr_err("la8: %s: la8->ftdic was NULL", __func__);
376 sr_dbg("la8: resetting the device");
379 * Purge pending read data from the FTDI hardware FIFO until
380 * no more data is left, or a timeout occurs (after 20s).
382 done = 20 + time(NULL);
384 /* TODO: Ignore errors? Check for < 0 at least! */
385 bytes_read = la8_read(la8, (uint8_t *)&buf, 4096);
387 } while ((done > now) && (bytes_read > 0));
389 /* Reset the LA8 sequencer logic and close the USB port. */
390 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
392 sr_dbg("la8: device reset finished");
397 static int configure_probes(struct la8 *la8, GSList *probes)
399 struct sr_probe *probe;
404 la8->trigger_pattern = 0;
405 la8->trigger_mask = 0; /* Default to "don't care" for all probes. */
407 for (l = probes; l; l = l->next) {
408 probe = (struct sr_probe *)l->data;
411 sr_err("la8: %s: probe was NULL", __func__);
415 /* Skip disabled probes. */
419 /* Skip (enabled) probes with no configured trigger. */
423 /* Note: Must only be run if probe->trigger != NULL. */
424 if (probe->index < 0 || probe->index > 7) {
425 sr_err("la8: %s: invalid probe index %d, must be "
426 "between 0 and 7", __func__, probe->index);
430 probe_bit = (1 << (probe->index - 1));
432 /* Configure the probe's trigger mask and trigger pattern. */
433 for (tc = probe->trigger; tc && *tc; tc++) {
434 la8->trigger_mask |= probe_bit;
436 /* Sanity check, LA8 only supports low/high trigger. */
437 if (*tc != '0' && *tc != '1') {
438 sr_err("la8: %s: invalid trigger '%c', only "
439 "'0'/'1' supported", __func__, *tc);
444 la8->trigger_pattern |= probe_bit;
448 sr_dbg("la8: %s: trigger_mask = 0x%x, trigger_pattern = 0x%x",
449 __func__, la8->trigger_mask, la8->trigger_pattern);
454 static int hw_init(const char *deviceinfo)
457 struct sr_device_instance *sdi;
460 sr_dbg("la8: entering %s", __func__);
462 /* Avoid compiler errors. */
463 deviceinfo = deviceinfo;
465 /* Allocate memory for our private driver context. */
466 if (!(la8 = g_try_malloc(sizeof(struct la8)))) {
467 sr_err("la8: %s: struct la8 malloc failed", __func__);
469 goto err_free_nothing;
472 /* Set some sane defaults. */
474 la8->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
476 la8->limit_samples = 0;
477 la8->session_id = NULL;
478 la8->mangled_buf = NULL;
479 la8->final_buf = NULL;
480 la8->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
481 la8->trigger_mask = 0x00; /* All probes are "don't care". */
482 la8->trigger_timeout = 10; /* Default to 10s trigger timeout. */
484 la8->block_counter = 0;
485 la8->divcount = 0; /* 10ns sample period == 100MHz samplerate */
487 /* Allocate memory for the raw (mangled) data from the LA8. */
488 if (!(la8->mangled_buf = g_try_malloc(SDRAM_SIZE))) {
489 sr_err("la8: %s: mangled_buf malloc failed", __func__);
494 /* Allocate memory where we'll store the de-mangled data. */
495 if (!(la8->final_buf = g_try_malloc(SDRAM_SIZE))) {
496 sr_err("la8: %s: final_buf malloc failed", __func__);
498 goto err_free_mangled_buf;
501 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
502 if (!(la8->ftdic = ftdi_new())) {
503 sr_err("la8: %s: ftdi_new failed", __func__);
504 ret = SR_ERR; /* TODO: More specific error? */
505 goto err_free_final_buf;
508 /* Check for the device and temporarily open it. */
509 if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID,
510 USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
511 sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
512 __func__, ret, ftdi_get_error_string(la8->ftdic));
513 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
514 ret = SR_ERR; /* TODO: More specific error? */
517 sr_dbg("la8: found device");
519 /* Register the device with libsigrok. */
520 sdi = sr_device_instance_new(0, SR_ST_INITIALIZING,
521 USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
523 sr_err("la8: %s: sr_device_instance_new failed", __func__);
524 ret = SR_ERR; /* TODO: More specific error? */
525 goto err_close_ftdic;
530 device_instances = g_slist_append(device_instances, sdi);
532 sr_dbg("la8: %s finished successfully", __func__);
534 /* Close device. We'll reopen it again when we need it. */
535 (void) la8_close(la8); /* Log, but ignore errors. */
537 // return SR_OK; /* TODO */
541 (void) la8_close(la8); /* Log, but ignore errors. */
543 free(la8->ftdic); /* NOT g_free()! */
545 g_free(la8->final_buf);
546 err_free_mangled_buf:
547 g_free(la8->mangled_buf);
551 // return ret; /* TODO */
555 static int hw_opendev(int device_index)
558 struct sr_device_instance *sdi;
561 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
562 sr_err("la8: %s: sdi was NULL", __func__);
563 return SR_ERR; /* TODO: SR_ERR_ARG? */
566 if (!(la8 = sdi->priv)) {
567 sr_err("la8: %s: sdi->priv was NULL", __func__);
568 return SR_ERR; /* TODO: SR_ERR_ARG? */
571 sr_dbg("la8: opening device");
573 /* Open the device. */
574 if ((ret = ftdi_usb_open_desc(la8->ftdic, USB_VENDOR_ID,
575 USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
576 sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
577 __func__, ret, ftdi_get_error_string(la8->ftdic));
578 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
581 sr_dbg("la8: device opened successfully");
583 /* Purge RX/TX buffers in the FTDI chip. */
584 if ((ret = ftdi_usb_purge_buffers(la8->ftdic)) < 0) {
585 sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
586 __func__, ret, ftdi_get_error_string(la8->ftdic));
587 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
588 goto err_opendev_close_ftdic;
590 sr_dbg("la8: FTDI buffers purged successfully");
592 /* Enable flow control in the FTDI chip. */
593 if ((ret = ftdi_setflowctrl(la8->ftdic, SIO_RTS_CTS_HS)) < 0) {
594 sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
595 __func__, ret, ftdi_get_error_string(la8->ftdic));
596 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
597 goto err_opendev_close_ftdic;
599 sr_dbg("la8: FTDI flow control enabled successfully");
602 g_usleep(100 * 1000);
604 sdi->status = SR_ST_ACTIVE;
608 err_opendev_close_ftdic:
609 (void) la8_close(la8); /* Log, but ignore errors. */
613 static int set_samplerate(struct sr_device_instance *sdi, uint64_t samplerate)
618 sr_err("la8: %s: sdi was NULL", __func__);
622 if (!(la8 = sdi->priv)) {
623 sr_err("la8: %s: sdi->priv was NULL", __func__);
627 sr_dbg("la8: setting samplerate");
629 fill_supported_samplerates_if_needed();
631 /* Check if this is a samplerate supported by the hardware. */
632 if (!is_valid_samplerate(samplerate))
635 /* Set the new samplerate. */
636 la8->cur_samplerate = samplerate;
638 sr_dbg("la8: samplerate set to %" PRIu64 "Hz", la8->cur_samplerate);
643 static void hw_closedev(int device_index)
645 struct sr_device_instance *sdi;
648 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
649 sr_err("la8: %s: sdi was NULL", __func__);
653 if (!(la8 = sdi->priv)) {
654 sr_err("la8: %s: sdi->priv was NULL", __func__);
658 sr_dbg("la8: closing device");
660 if (sdi->status == SR_ST_ACTIVE) {
661 sr_dbg("la8: %s: status ACTIVE, closing device", __func__);
662 (void) la8_close_usb_reset_sequencer(la8); /* Ignore errors. */
664 sr_dbg("la8: %s: status not ACTIVE, nothing to do", __func__);
667 sdi->status = SR_ST_INACTIVE;
669 sr_dbg("la8: %s: freeing sample buffers", __func__);
670 free(la8->mangled_buf);
671 free(la8->final_buf);
674 static void hw_cleanup(void)
677 struct sr_device_instance *sdi;
679 sr_dbg("la8: entering %s", __func__);
681 /* Properly close all devices. */
682 for (l = device_instances; l; l = l->next) {
683 if ((sdi = l->data) == NULL) {
684 sr_warn("la8: %s: sdi was NULL, continuing", __func__);
687 if (sdi->priv != NULL)
690 sr_warn("la8: %s: sdi->priv was NULL, nothing "
692 sr_device_instance_free(sdi); /* Returns void. */
694 g_slist_free(device_instances); /* Returns void. */
695 device_instances = NULL;
698 static void *hw_get_device_info(int device_index, int device_info_id)
700 struct sr_device_instance *sdi;
704 sr_dbg("la8: entering %s", __func__);
706 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
707 sr_err("la8: %s: sdi was NULL", __func__);
711 if (!(la8 = sdi->priv)) {
712 sr_err("la8: %s: sdi->priv was NULL", __func__);
716 switch (device_info_id) {
720 case SR_DI_NUM_PROBES:
721 info = GINT_TO_POINTER(NUM_PROBES);
723 case SR_DI_SAMPLERATES:
724 fill_supported_samplerates_if_needed();
727 case SR_DI_TRIGGER_TYPES:
728 info = (char *)TRIGGER_TYPES;
730 case SR_DI_CUR_SAMPLERATE:
731 info = &la8->cur_samplerate;
734 /* Unknown device info ID, return NULL. */
735 sr_err("la8: %s: Unknown device info ID", __func__);
743 static int hw_get_status(int device_index)
745 struct sr_device_instance *sdi;
747 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
748 sr_warn("la8: %s: sdi was NULL, device not found", __func__);
749 return SR_ST_NOT_FOUND;
752 sr_dbg("la8: %s: returning status %d", __func__, sdi->status);
757 static int *hw_get_capabilities(void)
759 sr_dbg("la8: entering %s", __func__);
764 static int hw_set_configuration(int device_index, int capability, void *value)
766 struct sr_device_instance *sdi;
769 sr_dbg("la8: entering %s", __func__);
771 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
772 sr_err("la8: %s: sdi was NULL", __func__);
773 return SR_ERR; /* TODO: SR_ERR_ARG? */
776 if (!(la8 = sdi->priv)) {
777 sr_err("la8: %s: sdi->priv was NULL", __func__);
778 return SR_ERR; /* TODO: SR_ERR_ARG? */
781 switch (capability) {
782 case SR_HWCAP_SAMPLERATE:
783 if (set_samplerate(sdi, *(uint64_t *)value) == SR_ERR)
785 sr_dbg("la8: SAMPLERATE = %" PRIu64, la8->cur_samplerate);
787 case SR_HWCAP_PROBECONFIG:
788 if (configure_probes(la8, (GSList *)value) != SR_OK) {
789 sr_err("la8: %s: probe config failed", __func__);
793 case SR_HWCAP_LIMIT_MSEC:
794 if (*(uint64_t *)value == 0) {
795 sr_err("la8: %s: LIMIT_MSEC can't be 0", __func__);
798 la8->limit_msec = *(uint64_t *)value;
799 sr_dbg("la8: LIMIT_MSEC = %" PRIu64, la8->limit_msec);
801 case SR_HWCAP_LIMIT_SAMPLES:
802 if (*(uint64_t *)value < MIN_NUM_SAMPLES) {
803 sr_err("la8: %s: LIMIT_SAMPLES too small", __func__);
806 la8->limit_samples = *(uint64_t *)value;
807 sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, la8->limit_samples);
810 /* Unknown capability, return SR_ERR. */
811 sr_err("la8: %s: Unknown capability", __func__);
820 * Get a block of 4096 bytes of data from the LA8.
822 * @param la8 The LA8 struct containing private per-device-instance data.
823 * @return SR_OK upon success, or SR_ERR upon errors.
825 static int la8_read_block(struct la8 *la8)
827 int i, byte_offset, m, mi, p, index, bytes_read;
831 sr_err("la8: %s: la8 was NULL", __func__);
836 sr_err("la8: %s: la8->ftdic was NULL", __func__);
840 // sr_dbg("la8: %s: reading block %d", __func__, la8->block_counter);
842 bytes_read = la8_read(la8, la8->mangled_buf, 4096);
844 /* If first block read got 0 bytes, retry until success or timeout. */
845 if ((bytes_read == 0) && (la8->block_counter == 0)) {
847 // sr_dbg("la8: %s: reading block 0 again", __func__);
848 bytes_read = la8_read(la8, la8->mangled_buf, 4096);
849 /* TODO: How to handle read errors here? */
851 } while ((la8->done > now) && (bytes_read == 0));
854 /* Check if block read was successful or a timeout occured. */
855 if (bytes_read != 4096) {
856 sr_warn("la8: %s: trigger timed out", __func__);
857 (void) la8_reset(la8); /* Ignore errors. */
861 /* De-mangle the data. */
862 // sr_dbg("la8: de-mangling samples of block %d", la8->block_counter);
863 byte_offset = la8->block_counter * 4096;
864 m = byte_offset / (1024 * 1024);
865 mi = m * (1024 * 1024);
866 for (i = 0; i < 4096; i++) {
868 index = m * 2 + (((byte_offset + i) - mi) / 2) * 16;
869 index += (la8->divcount == 0) ? p : (1 - p);
870 la8->final_buf[index] = la8->mangled_buf[i];
876 static int receive_data(int fd, int revents, void *user_data)
879 struct sr_device_instance *sdi;
880 struct sr_datafeed_packet packet;
883 /* Avoid compiler errors. */
887 if (!(sdi = user_data)) {
888 sr_err("la8: %s: user_data was NULL", __func__);
892 if (!(la8 = sdi->priv)) {
893 sr_err("la8: %s: sdi->priv was NULL", __func__);
897 /* Get one block of data (4096 bytes). */
898 if ((ret = la8_read_block(la8)) < 0) {
899 sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
900 hw_stop_acquisition(sdi->index, user_data);
904 /* We need to get exactly 2048 blocks (i.e. 8MB) of data. */
905 if (la8->block_counter != 2047) {
906 la8->block_counter++;
910 sr_dbg("la8: sampling finished, sending data to session bus now");
912 /* All data was received and demangled, send it to the session bus. */
913 for (i = 0; i < 2048; i++) {
914 /* Send a 4096 byte SR_DF_LOGIC packet to the session bus. */
915 // sr_dbg("la8: %s: sending SR_DF_LOGIC packet", __func__);
916 packet.type = SR_DF_LOGIC;
917 packet.length = 4096;
919 packet.payload = la8->final_buf + (i * 4096);
920 sr_session_bus(la8->session_id, &packet);
923 hw_stop_acquisition(sdi->index, user_data);
925 // return FALSE; /* FIXME? */
929 static int hw_start_acquisition(int device_index, gpointer session_device_id)
931 struct sr_device_instance *sdi;
933 struct sr_datafeed_packet packet;
934 struct sr_datafeed_header header;
938 sr_dbg("la8: entering %s", __func__);
940 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
941 sr_err("la8: %s: sdi was NULL", __func__);
942 return SR_ERR; /* TODO: SR_ERR_ARG? */
945 if (!(la8 = sdi->priv)) {
946 sr_err("la8: %s: sdi->priv was NULL", __func__);
947 return SR_ERR; /* TODO: SR_ERR_ARG? */
951 sr_err("la8: %s: la8->ftdic was NULL", __func__);
955 la8->divcount = samplerate_to_divcount(la8->cur_samplerate);
956 if (la8->divcount == 0xff) {
957 sr_err("la8: %s: invalid divcount/samplerate", __func__);
961 /* Fill acquisition parameters into buf[]. */
962 buf[0] = la8->divcount;
963 buf[1] = 0xff; /* This byte must always be 0xff. */
964 buf[2] = la8->trigger_pattern;
965 buf[3] = la8->trigger_mask;
967 /* Start acquisition. */
968 bytes_written = la8_write(la8, buf, 4);
970 if (bytes_written < 0) {
971 sr_err("la8: acquisition failed to start");
973 } else if (bytes_written != 4) {
974 sr_err("la8: acquisition failed to start");
975 return SR_ERR; /* TODO: Other error and return code? */
978 sr_dbg("la8: acquisition started successfully");
980 la8->session_id = session_device_id;
982 /* Send header packet to the session bus. */
983 sr_dbg("la8: %s: sending SR_DF_HEADER", __func__);
984 packet.type = SR_DF_HEADER;
985 packet.length = sizeof(struct sr_datafeed_header);
987 packet.payload = &header;
988 header.feed_version = 1;
989 gettimeofday(&header.starttime, NULL);
990 header.samplerate = la8->cur_samplerate;
991 header.protocol_id = SR_PROTO_RAW;
992 header.num_logic_probes = NUM_PROBES;
993 header.num_analog_probes = 0;
994 sr_session_bus(session_device_id, &packet);
996 /* Time when we should be done (for detecting trigger timeouts). */
997 la8->done = (la8->divcount + 1) * 0.08388608 + time(NULL)
998 + la8->trigger_timeout;
999 la8->block_counter = 0;
1001 /* Hook up a dummy handler to receive data from the LA8. */
1002 sr_source_add(-1, G_IO_IN, 0, receive_data, sdi);
1007 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
1009 struct sr_device_instance *sdi;
1011 struct sr_datafeed_packet packet;
1013 sr_dbg("la8: stopping acquisition");
1015 if (!(sdi = sr_get_device_instance(device_instances, device_index))) {
1016 sr_err("la8: %s: sdi was NULL", __func__);
1020 if (!(la8 = sdi->priv)) {
1021 sr_err("la8: %s: sdi->priv was NULL", __func__);
1025 /* Send end packet to the session bus. */
1026 sr_dbg("la8: %s: sending SR_DF_END", __func__);
1027 packet.type = SR_DF_END;
1029 packet.unitsize = 0;
1030 packet.payload = NULL;
1031 sr_session_bus(session_device_id, &packet);
1034 struct sr_device_plugin chronovu_la8_plugin_info = {
1035 .name = "chronovu-la8",
1036 .longname = "ChronoVu LA8",
1039 .cleanup = hw_cleanup,
1041 .close = hw_closedev,
1042 .get_device_info = hw_get_device_info,
1043 .get_status = hw_get_status,
1044 .get_capabilities = hw_get_capabilities,
1045 .set_configuration = hw_set_configuration,
1046 .start_acquisition = hw_start_acquisition,
1047 .stop_acquisition = hw_stop_acquisition,