2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010-2012 Håvard Espeland <gus@ping.uio.no>,
5 * Copyright (C) 2010 Martin Stensgård <mastensg@ping.uio.no>
6 * Copyright (C) 2010 Carl Henrik Lunde <chlunde@ping.uio.no>
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 * ASIX SIGMA/SIGMA2 logic analyzer driver
27 #include <glib/gstdio.h>
30 #include "libsigrok.h"
31 #include "libsigrok-internal.h"
32 #include "asix-sigma.h"
34 #define USB_VENDOR 0xa600
35 #define USB_PRODUCT 0xa000
36 #define USB_DESCRIPTION "ASIX SIGMA"
37 #define USB_VENDOR_NAME "ASIX"
38 #define USB_MODEL_NAME "SIGMA"
39 #define USB_MODEL_VERSION ""
40 #define TRIGGER_TYPE "rf10"
43 SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
44 static struct sr_dev_driver *di = &asix_sigma_driver_info;
45 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
47 static const uint64_t samplerates[] = {
61 * Probe numbers seem to go from 1-16, according to this image:
62 * http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
63 * (the cable has two additional GND pins, and a TI and TO pin)
65 static const char *probe_names[NUM_PROBES + 1] = {
66 "1", "2", "3", "4", "5", "6", "7", "8",
67 "9", "10", "11", "12", "13", "14", "15", "16",
71 static const int32_t hwcaps[] = {
72 SR_CONF_LOGIC_ANALYZER,
74 SR_CONF_CAPTURE_RATIO,
78 /* Force the FPGA to reboot. */
79 static uint8_t suicide[] = {
80 0x84, 0x84, 0x88, 0x84, 0x88, 0x84, 0x88, 0x84,
83 /* Prepare to upload firmware (FPGA specific). */
84 static uint8_t init[] = {
85 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
88 /* Initialize the logic analyzer mode. */
89 static uint8_t logic_mode_start[] = {
90 0x00, 0x40, 0x0f, 0x25, 0x35, 0x40,
91 0x2a, 0x3a, 0x40, 0x03, 0x20, 0x38,
94 static const char *firmware_files[] = {
95 "asix-sigma-50.fw", /* 50 MHz, supports 8 bit fractions */
96 "asix-sigma-100.fw", /* 100 MHz */
97 "asix-sigma-200.fw", /* 200 MHz */
98 "asix-sigma-50sync.fw", /* Synchronous clock from pin */
99 "asix-sigma-phasor.fw", /* Frequency counter */
102 static int sigma_read(void *buf, size_t size, struct dev_context *devc)
106 ret = ftdi_read_data(&devc->ftdic, (unsigned char *)buf, size);
108 sr_err("ftdi_read_data failed: %s",
109 ftdi_get_error_string(&devc->ftdic));
115 static int sigma_write(void *buf, size_t size, struct dev_context *devc)
119 ret = ftdi_write_data(&devc->ftdic, (unsigned char *)buf, size);
121 sr_err("ftdi_write_data failed: %s",
122 ftdi_get_error_string(&devc->ftdic));
123 } else if ((size_t) ret != size) {
124 sr_err("ftdi_write_data did not complete write.");
130 static int sigma_write_register(uint8_t reg, uint8_t *data, size_t len,
131 struct dev_context *devc)
134 uint8_t buf[len + 2];
137 buf[idx++] = REG_ADDR_LOW | (reg & 0xf);
138 buf[idx++] = REG_ADDR_HIGH | (reg >> 4);
140 for (i = 0; i < len; ++i) {
141 buf[idx++] = REG_DATA_LOW | (data[i] & 0xf);
142 buf[idx++] = REG_DATA_HIGH_WRITE | (data[i] >> 4);
145 return sigma_write(buf, idx, devc);
148 static int sigma_set_register(uint8_t reg, uint8_t value, struct dev_context *devc)
150 return sigma_write_register(reg, &value, 1, devc);
153 static int sigma_read_register(uint8_t reg, uint8_t *data, size_t len,
154 struct dev_context *devc)
158 buf[0] = REG_ADDR_LOW | (reg & 0xf);
159 buf[1] = REG_ADDR_HIGH | (reg >> 4);
160 buf[2] = REG_READ_ADDR;
162 sigma_write(buf, sizeof(buf), devc);
164 return sigma_read(data, len, devc);
167 static uint8_t sigma_get_register(uint8_t reg, struct dev_context *devc)
171 if (1 != sigma_read_register(reg, &value, 1, devc)) {
172 sr_err("sigma_get_register: 1 byte expected");
179 static int sigma_read_pos(uint32_t *stoppos, uint32_t *triggerpos,
180 struct dev_context *devc)
183 REG_ADDR_LOW | READ_TRIGGER_POS_LOW,
185 REG_READ_ADDR | NEXT_REG,
186 REG_READ_ADDR | NEXT_REG,
187 REG_READ_ADDR | NEXT_REG,
188 REG_READ_ADDR | NEXT_REG,
189 REG_READ_ADDR | NEXT_REG,
190 REG_READ_ADDR | NEXT_REG,
194 sigma_write(buf, sizeof(buf), devc);
196 sigma_read(result, sizeof(result), devc);
198 *triggerpos = result[0] | (result[1] << 8) | (result[2] << 16);
199 *stoppos = result[3] | (result[4] << 8) | (result[5] << 16);
201 /* Not really sure why this must be done, but according to spec. */
202 if ((--*stoppos & 0x1ff) == 0x1ff)
205 if ((*--triggerpos & 0x1ff) == 0x1ff)
211 static int sigma_read_dram(uint16_t startchunk, size_t numchunks,
212 uint8_t *data, struct dev_context *devc)
218 /* Send the startchunk. Index start with 1. */
219 buf[0] = startchunk >> 8;
220 buf[1] = startchunk & 0xff;
221 sigma_write_register(WRITE_MEMROW, buf, 2, devc);
224 buf[idx++] = REG_DRAM_BLOCK;
225 buf[idx++] = REG_DRAM_WAIT_ACK;
227 for (i = 0; i < numchunks; ++i) {
228 /* Alternate bit to copy from DRAM to cache. */
229 if (i != (numchunks - 1))
230 buf[idx++] = REG_DRAM_BLOCK | (((i + 1) % 2) << 4);
232 buf[idx++] = REG_DRAM_BLOCK_DATA | ((i % 2) << 4);
234 if (i != (numchunks - 1))
235 buf[idx++] = REG_DRAM_WAIT_ACK;
238 sigma_write(buf, idx, devc);
240 return sigma_read(data, numchunks * CHUNK_SIZE, devc);
243 /* Upload trigger look-up tables to Sigma. */
244 static int sigma_write_trigger_lut(struct triggerlut *lut, struct dev_context *devc)
250 /* Transpose the table and send to Sigma. */
251 for (i = 0; i < 16; ++i) {
256 if (lut->m2d[0] & bit)
258 if (lut->m2d[1] & bit)
260 if (lut->m2d[2] & bit)
262 if (lut->m2d[3] & bit)
272 if (lut->m0d[0] & bit)
274 if (lut->m0d[1] & bit)
276 if (lut->m0d[2] & bit)
278 if (lut->m0d[3] & bit)
281 if (lut->m1d[0] & bit)
283 if (lut->m1d[1] & bit)
285 if (lut->m1d[2] & bit)
287 if (lut->m1d[3] & bit)
290 sigma_write_register(WRITE_TRIGGER_SELECT0, tmp, sizeof(tmp),
292 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x30 | i, devc);
295 /* Send the parameters */
296 sigma_write_register(WRITE_TRIGGER_SELECT0, (uint8_t *) &lut->params,
297 sizeof(lut->params), devc);
302 /* Generate the bitbang stream for programming the FPGA. */
303 static int bin2bitbang(const char *filename,
304 unsigned char **buf, size_t *buf_size)
307 unsigned long file_size;
308 unsigned long offset = 0;
311 unsigned long fwsize = 0;
312 const int buffer_size = 65536;
315 uint32_t imm = 0x3f6df2ab;
317 f = g_fopen(filename, "rb");
319 sr_err("g_fopen(\"%s\", \"rb\")", filename);
323 if (-1 == fseek(f, 0, SEEK_END)) {
324 sr_err("fseek on %s failed", filename);
329 file_size = ftell(f);
331 fseek(f, 0, SEEK_SET);
333 if (!(firmware = g_try_malloc(buffer_size))) {
334 sr_err("%s: firmware malloc failed", __func__);
336 return SR_ERR_MALLOC;
339 while ((c = getc(f)) != EOF) {
340 imm = (imm + 0xa853753) % 177 + (imm * 0x8034052);
341 firmware[fwsize++] = c ^ imm;
345 if(fwsize != file_size) {
346 sr_err("%s: Error reading firmware", filename);
352 *buf_size = fwsize * 2 * 8;
354 *buf = p = (unsigned char *)g_try_malloc(*buf_size);
356 sr_err("%s: buf/p malloc failed", __func__);
358 return SR_ERR_MALLOC;
361 for (i = 0; i < fwsize; ++i) {
362 for (bit = 7; bit >= 0; --bit) {
363 v = firmware[i] & 1 << bit ? 0x40 : 0x00;
364 p[offset++] = v | 0x01;
371 if (offset != *buf_size) {
373 sr_err("Error reading firmware %s "
374 "offset=%ld, file_size=%ld, buf_size=%zd.",
375 filename, offset, file_size, *buf_size);
383 static int clear_instances(void)
386 struct sr_dev_inst *sdi;
387 struct drv_context *drvc;
388 struct dev_context *devc;
392 /* Properly close all devices. */
393 for (l = drvc->instances; l; l = l->next) {
394 if (!(sdi = l->data)) {
395 /* Log error, but continue cleaning up the rest. */
396 sr_err("%s: sdi was NULL, continuing", __func__);
401 ftdi_deinit(&devc->ftdic);
403 sr_dev_inst_free(sdi);
405 g_slist_free(drvc->instances);
406 drvc->instances = NULL;
411 static int hw_init(struct sr_context *sr_ctx)
413 return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
416 static GSList *hw_scan(GSList *options)
418 struct sr_dev_inst *sdi;
419 struct sr_probe *probe;
420 struct drv_context *drvc;
421 struct dev_context *devc;
423 struct ftdi_device_list *devlist;
436 if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
437 sr_err("%s: devc malloc failed", __func__);
441 ftdi_init(&devc->ftdic);
443 /* Look for SIGMAs. */
445 if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
446 USB_VENDOR, USB_PRODUCT)) <= 0) {
448 sr_err("ftdi_usb_find_all(): %d", ret);
452 /* Make sure it's a version 1 or 2 SIGMA. */
453 ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
454 serial_txt, sizeof(serial_txt));
455 sscanf(serial_txt, "%x", &serial);
457 if (serial < 0xa6010000 || serial > 0xa602ffff) {
458 sr_err("Only SIGMA and SIGMA2 are supported "
459 "in this version of libsigrok.");
463 sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);
465 devc->cur_samplerate = 0;
467 devc->limit_msec = 0;
468 devc->cur_firmware = -1;
469 devc->num_probes = 0;
470 devc->samples_per_event = 0;
471 devc->capture_ratio = 50;
472 devc->use_triggers = 0;
474 /* Register SIGMA device. */
475 if (!(sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING, USB_VENDOR_NAME,
476 USB_MODEL_NAME, USB_MODEL_VERSION))) {
477 sr_err("%s: sdi was NULL", __func__);
482 for (i = 0; probe_names[i]; i++) {
483 if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
486 sdi->probes = g_slist_append(sdi->probes, probe);
489 devices = g_slist_append(devices, sdi);
490 drvc->instances = g_slist_append(drvc->instances, sdi);
493 /* We will open the device again when we need it. */
494 ftdi_list_free(&devlist);
499 ftdi_deinit(&devc->ftdic);
504 static GSList *hw_dev_list(void)
506 return ((struct drv_context *)(di->priv))->instances;
509 static int upload_firmware(int firmware_idx, struct dev_context *devc)
515 unsigned char result[32];
516 char firmware_path[128];
518 /* Make sure it's an ASIX SIGMA. */
519 if ((ret = ftdi_usb_open_desc(&devc->ftdic,
520 USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
521 sr_err("ftdi_usb_open failed: %s",
522 ftdi_get_error_string(&devc->ftdic));
526 if ((ret = ftdi_set_bitmode(&devc->ftdic, 0xdf, BITMODE_BITBANG)) < 0) {
527 sr_err("ftdi_set_bitmode failed: %s",
528 ftdi_get_error_string(&devc->ftdic));
532 /* Four times the speed of sigmalogan - Works well. */
533 if ((ret = ftdi_set_baudrate(&devc->ftdic, 750000)) < 0) {
534 sr_err("ftdi_set_baudrate failed: %s",
535 ftdi_get_error_string(&devc->ftdic));
539 /* Force the FPGA to reboot. */
540 sigma_write(suicide, sizeof(suicide), devc);
541 sigma_write(suicide, sizeof(suicide), devc);
542 sigma_write(suicide, sizeof(suicide), devc);
543 sigma_write(suicide, sizeof(suicide), devc);
545 /* Prepare to upload firmware (FPGA specific). */
546 sigma_write(init, sizeof(init), devc);
548 ftdi_usb_purge_buffers(&devc->ftdic);
550 /* Wait until the FPGA asserts INIT_B. */
552 ret = sigma_read(result, 1, devc);
553 if (result[0] & 0x20)
557 /* Prepare firmware. */
558 snprintf(firmware_path, sizeof(firmware_path), "%s/%s", FIRMWARE_DIR,
559 firmware_files[firmware_idx]);
561 if ((ret = bin2bitbang(firmware_path, &buf, &buf_size)) != SR_OK) {
562 sr_err("An error occured while reading the firmware: %s",
567 /* Upload firmare. */
568 sr_info("Uploading firmware file '%s'.", firmware_files[firmware_idx]);
569 sigma_write(buf, buf_size, devc);
573 if ((ret = ftdi_set_bitmode(&devc->ftdic, 0x00, BITMODE_RESET)) < 0) {
574 sr_err("ftdi_set_bitmode failed: %s",
575 ftdi_get_error_string(&devc->ftdic));
579 ftdi_usb_purge_buffers(&devc->ftdic);
581 /* Discard garbage. */
582 while (1 == sigma_read(&pins, 1, devc))
585 /* Initialize the logic analyzer mode. */
586 sigma_write(logic_mode_start, sizeof(logic_mode_start), devc);
588 /* Expect a 3 byte reply. */
589 ret = sigma_read(result, 3, devc);
591 result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) {
592 sr_err("Configuration failed. Invalid reply received.");
596 devc->cur_firmware = firmware_idx;
598 sr_info("Firmware uploaded.");
603 static int hw_dev_open(struct sr_dev_inst *sdi)
605 struct dev_context *devc;
610 /* Make sure it's an ASIX SIGMA. */
611 if ((ret = ftdi_usb_open_desc(&devc->ftdic,
612 USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
614 sr_err("ftdi_usb_open failed: %s",
615 ftdi_get_error_string(&devc->ftdic));
620 sdi->status = SR_ST_ACTIVE;
625 static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
627 struct dev_context *devc;
634 for (i = 0; i < ARRAY_SIZE(samplerates); i++) {
635 if (samplerates[i] == samplerate)
638 if (samplerates[i] == 0)
639 return SR_ERR_SAMPLERATE;
641 if (samplerate <= SR_MHZ(50)) {
642 ret = upload_firmware(0, devc);
643 devc->num_probes = 16;
645 if (samplerate == SR_MHZ(100)) {
646 ret = upload_firmware(1, devc);
647 devc->num_probes = 8;
649 else if (samplerate == SR_MHZ(200)) {
650 ret = upload_firmware(2, devc);
651 devc->num_probes = 4;
654 devc->cur_samplerate = samplerate;
655 devc->period_ps = 1000000000000ULL / samplerate;
656 devc->samples_per_event = 16 / devc->num_probes;
657 devc->state.state = SIGMA_IDLE;
663 * In 100 and 200 MHz mode, only a single pin rising/falling can be
664 * set as trigger. In other modes, two rising/falling triggers can be set,
665 * in addition to value/mask trigger for any number of probes.
667 * The Sigma supports complex triggers using boolean expressions, but this
668 * has not been implemented yet.
670 static int configure_probes(const struct sr_dev_inst *sdi)
672 struct dev_context *devc = sdi->priv;
673 const struct sr_probe *probe;
678 memset(&devc->trigger, 0, sizeof(struct sigma_trigger));
680 for (l = sdi->probes; l; l = l->next) {
681 probe = (struct sr_probe *)l->data;
682 probebit = 1 << (probe->index);
684 if (!probe->enabled || !probe->trigger)
687 if (devc->cur_samplerate >= SR_MHZ(100)) {
688 /* Fast trigger support. */
690 sr_err("Only a single pin trigger in 100 and "
691 "200MHz mode is supported.");
694 if (probe->trigger[0] == 'f')
695 devc->trigger.fallingmask |= probebit;
696 else if (probe->trigger[0] == 'r')
697 devc->trigger.risingmask |= probebit;
699 sr_err("Only rising/falling trigger in 100 "
700 "and 200MHz mode is supported.");
706 /* Simple trigger support (event). */
707 if (probe->trigger[0] == '1') {
708 devc->trigger.simplevalue |= probebit;
709 devc->trigger.simplemask |= probebit;
711 else if (probe->trigger[0] == '0') {
712 devc->trigger.simplevalue &= ~probebit;
713 devc->trigger.simplemask |= probebit;
715 else if (probe->trigger[0] == 'f') {
716 devc->trigger.fallingmask |= probebit;
719 else if (probe->trigger[0] == 'r') {
720 devc->trigger.risingmask |= probebit;
725 * Actually, Sigma supports 2 rising/falling triggers,
726 * but they are ORed and the current trigger syntax
727 * does not permit ORed triggers.
729 if (trigger_set > 1) {
730 sr_err("Only 1 rising/falling trigger "
737 devc->use_triggers = 1;
743 static int hw_dev_close(struct sr_dev_inst *sdi)
745 struct dev_context *devc;
750 if (sdi->status == SR_ST_ACTIVE)
751 ftdi_usb_close(&devc->ftdic);
753 sdi->status = SR_ST_INACTIVE;
758 static int hw_cleanup(void)
768 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
770 struct dev_context *devc;
773 case SR_CONF_SAMPLERATE:
776 *data = g_variant_new_uint64(devc->cur_samplerate);
787 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
789 struct dev_context *devc;
792 if (sdi->status != SR_ST_ACTIVE)
793 return SR_ERR_DEV_CLOSED;
797 if (id == SR_CONF_SAMPLERATE) {
798 ret = set_samplerate(sdi, g_variant_get_uint64(data));
799 } else if (id == SR_CONF_LIMIT_MSEC) {
800 devc->limit_msec = g_variant_get_uint64(data);
801 if (devc->limit_msec > 0)
805 } else if (id == SR_CONF_CAPTURE_RATIO) {
806 devc->capture_ratio = g_variant_get_uint64(data);
807 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
818 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
826 case SR_CONF_DEVICE_OPTIONS:
827 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
828 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
830 case SR_CONF_SAMPLERATE:
831 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
832 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
833 ARRAY_SIZE(samplerates), sizeof(uint64_t));
834 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
835 *data = g_variant_builder_end(&gvb);
837 case SR_CONF_TRIGGER_TYPE:
838 *data = g_variant_new_string(TRIGGER_TYPE);
847 /* Software trigger to determine exact trigger position. */
848 static int get_trigger_offset(uint16_t *samples, uint16_t last_sample,
849 struct sigma_trigger *t)
853 for (i = 0; i < 8; ++i) {
855 last_sample = samples[i-1];
857 /* Simple triggers. */
858 if ((samples[i] & t->simplemask) != t->simplevalue)
862 if ((last_sample & t->risingmask) != 0 || (samples[i] &
863 t->risingmask) != t->risingmask)
867 if ((last_sample & t->fallingmask) != t->fallingmask ||
868 (samples[i] & t->fallingmask) != 0)
874 /* If we did not match, return original trigger pos. */
879 * Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster.
880 * Each event is 20ns apart, and can contain multiple samples.
882 * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart.
883 * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart.
884 * For 50 MHz and below, events contain one sample for each channel,
885 * spread 20 ns apart.
887 static int decode_chunk_ts(uint8_t *buf, uint16_t *lastts,
888 uint16_t *lastsample, int triggerpos,
889 uint16_t limit_chunk, void *cb_data)
891 struct sr_dev_inst *sdi = cb_data;
892 struct dev_context *devc = sdi->priv;
894 uint16_t samples[65536 * devc->samples_per_event];
895 struct sr_datafeed_packet packet;
896 struct sr_datafeed_logic logic;
897 int i, j, k, l, numpad, tosend;
898 size_t n = 0, sent = 0;
899 int clustersize = EVENTS_PER_CLUSTER * devc->samples_per_event;
904 /* Check if trigger is in this chunk. */
905 if (triggerpos != -1) {
906 if (devc->cur_samplerate <= SR_MHZ(50))
907 triggerpos -= EVENTS_PER_CLUSTER - 1;
912 /* Find in which cluster the trigger occured. */
913 triggerts = triggerpos / 7;
917 for (i = 0; i < 64; ++i) {
918 ts = *(uint16_t *) &buf[i * 16];
919 tsdiff = ts - *lastts;
922 /* Decode partial chunk. */
923 if (limit_chunk && ts > limit_chunk)
926 /* Pad last sample up to current point. */
927 numpad = tsdiff * devc->samples_per_event - clustersize;
929 for (j = 0; j < numpad; ++j)
930 samples[j] = *lastsample;
935 /* Send samples between previous and this timestamp to sigrok. */
938 tosend = MIN(2048, n - sent);
940 packet.type = SR_DF_LOGIC;
941 packet.payload = &logic;
942 logic.length = tosend * sizeof(uint16_t);
944 logic.data = samples + sent;
945 sr_session_send(devc->cb_data, &packet);
951 event = (uint16_t *) &buf[i * 16 + 2];
954 /* For each event in cluster. */
955 for (j = 0; j < 7; ++j) {
957 /* For each sample in event. */
958 for (k = 0; k < devc->samples_per_event; ++k) {
961 /* For each probe. */
962 for (l = 0; l < devc->num_probes; ++l)
963 cur_sample |= (!!(event[j] & (1 << (l *
964 devc->samples_per_event + k)))) << l;
966 samples[n++] = cur_sample;
970 /* Send data up to trigger point (if triggered). */
972 if (i == triggerts) {
974 * Trigger is not always accurate to sample because of
975 * pipeline delay. However, it always triggers before
976 * the actual event. We therefore look at the next
977 * samples to pinpoint the exact position of the trigger.
979 tosend = get_trigger_offset(samples, *lastsample,
983 packet.type = SR_DF_LOGIC;
984 packet.payload = &logic;
985 logic.length = tosend * sizeof(uint16_t);
987 logic.data = samples;
988 sr_session_send(devc->cb_data, &packet);
993 /* Only send trigger if explicitly enabled. */
994 if (devc->use_triggers) {
995 packet.type = SR_DF_TRIGGER;
996 sr_session_send(devc->cb_data, &packet);
1000 /* Send rest of the chunk to sigrok. */
1004 packet.type = SR_DF_LOGIC;
1005 packet.payload = &logic;
1006 logic.length = tosend * sizeof(uint16_t);
1008 logic.data = samples + sent;
1009 sr_session_send(devc->cb_data, &packet);
1012 *lastsample = samples[n - 1];
1018 static int receive_data(int fd, int revents, void *cb_data)
1020 struct sr_dev_inst *sdi = cb_data;
1021 struct dev_context *devc = sdi->priv;
1022 struct sr_datafeed_packet packet;
1023 const int chunks_per_read = 32;
1024 unsigned char buf[chunks_per_read * CHUNK_SIZE];
1025 int bufsz, numchunks, i, newchunks;
1026 uint64_t running_msec;
1032 /* Get the current position. */
1033 sigma_read_pos(&devc->state.stoppos, &devc->state.triggerpos, devc);
1035 numchunks = (devc->state.stoppos + 511) / 512;
1037 if (devc->state.state == SIGMA_IDLE)
1040 if (devc->state.state == SIGMA_CAPTURE) {
1041 /* Check if the timer has expired, or memory is full. */
1042 gettimeofday(&tv, 0);
1043 running_msec = (tv.tv_sec - devc->start_tv.tv_sec) * 1000 +
1044 (tv.tv_usec - devc->start_tv.tv_usec) / 1000;
1046 if (running_msec < devc->limit_msec && numchunks < 32767)
1047 return TRUE; /* While capturing... */
1049 hw_dev_acquisition_stop(sdi, sdi);
1053 if (devc->state.state == SIGMA_DOWNLOAD) {
1054 if (devc->state.chunks_downloaded >= numchunks) {
1055 /* End of samples. */
1056 packet.type = SR_DF_END;
1057 sr_session_send(devc->cb_data, &packet);
1059 devc->state.state = SIGMA_IDLE;
1064 newchunks = MIN(chunks_per_read,
1065 numchunks - devc->state.chunks_downloaded);
1067 sr_info("Downloading sample data: %.0f %%.",
1068 100.0 * devc->state.chunks_downloaded / numchunks);
1070 bufsz = sigma_read_dram(devc->state.chunks_downloaded,
1071 newchunks, buf, devc);
1072 /* TODO: Check bufsz. For now, just avoid compiler warnings. */
1075 /* Find first ts. */
1076 if (devc->state.chunks_downloaded == 0) {
1077 devc->state.lastts = *(uint16_t *) buf - 1;
1078 devc->state.lastsample = 0;
1081 /* Decode chunks and send them to sigrok. */
1082 for (i = 0; i < newchunks; ++i) {
1083 int limit_chunk = 0;
1085 /* The last chunk may potentially be only in part. */
1086 if (devc->state.chunks_downloaded == numchunks - 1) {
1087 /* Find the last valid timestamp */
1088 limit_chunk = devc->state.stoppos % 512 + devc->state.lastts;
1091 if (devc->state.chunks_downloaded + i == devc->state.triggerchunk)
1092 decode_chunk_ts(buf + (i * CHUNK_SIZE),
1093 &devc->state.lastts,
1094 &devc->state.lastsample,
1095 devc->state.triggerpos & 0x1ff,
1098 decode_chunk_ts(buf + (i * CHUNK_SIZE),
1099 &devc->state.lastts,
1100 &devc->state.lastsample,
1101 -1, limit_chunk, sdi);
1103 ++devc->state.chunks_downloaded;
1110 /* Build a LUT entry used by the trigger functions. */
1111 static void build_lut_entry(uint16_t value, uint16_t mask, uint16_t *entry)
1115 /* For each quad probe. */
1116 for (i = 0; i < 4; ++i) {
1119 /* For each bit in LUT. */
1120 for (j = 0; j < 16; ++j)
1122 /* For each probe in quad. */
1123 for (k = 0; k < 4; ++k) {
1124 bit = 1 << (i * 4 + k);
1126 /* Set bit in entry */
1128 ((!(value & bit)) !=
1130 entry[i] &= ~(1 << j);
1135 /* Add a logical function to LUT mask. */
1136 static void add_trigger_function(enum triggerop oper, enum triggerfunc func,
1137 int index, int neg, uint16_t *mask)
1140 int x[2][2], tmp, a, b, aset, bset, rset;
1142 memset(x, 0, 4 * sizeof(int));
1144 /* Trigger detect condition. */
1174 case OP_NOTRISEFALL:
1180 /* Transpose if neg is set. */
1182 for (i = 0; i < 2; ++i) {
1183 for (j = 0; j < 2; ++j) {
1185 x[i][j] = x[1-i][1-j];
1191 /* Update mask with function. */
1192 for (i = 0; i < 16; ++i) {
1193 a = (i >> (2 * index + 0)) & 1;
1194 b = (i >> (2 * index + 1)) & 1;
1196 aset = (*mask >> i) & 1;
1199 if (func == FUNC_AND || func == FUNC_NAND)
1201 else if (func == FUNC_OR || func == FUNC_NOR)
1203 else if (func == FUNC_XOR || func == FUNC_NXOR)
1206 if (func == FUNC_NAND || func == FUNC_NOR || func == FUNC_NXOR)
1217 * Build trigger LUTs used by 50 MHz and lower sample rates for supporting
1218 * simple pin change and state triggers. Only two transitions (rise/fall) can be
1219 * set at any time, but a full mask and value can be set (0/1).
1221 static int build_basic_trigger(struct triggerlut *lut, struct dev_context *devc)
1224 uint16_t masks[2] = { 0, 0 };
1226 memset(lut, 0, sizeof(struct triggerlut));
1228 /* Contant for simple triggers. */
1231 /* Value/mask trigger support. */
1232 build_lut_entry(devc->trigger.simplevalue, devc->trigger.simplemask,
1235 /* Rise/fall trigger support. */
1236 for (i = 0, j = 0; i < 16; ++i) {
1237 if (devc->trigger.risingmask & (1 << i) ||
1238 devc->trigger.fallingmask & (1 << i))
1239 masks[j++] = 1 << i;
1242 build_lut_entry(masks[0], masks[0], lut->m0d);
1243 build_lut_entry(masks[1], masks[1], lut->m1d);
1245 /* Add glue logic */
1246 if (masks[0] || masks[1]) {
1247 /* Transition trigger. */
1248 if (masks[0] & devc->trigger.risingmask)
1249 add_trigger_function(OP_RISE, FUNC_OR, 0, 0, &lut->m3);
1250 if (masks[0] & devc->trigger.fallingmask)
1251 add_trigger_function(OP_FALL, FUNC_OR, 0, 0, &lut->m3);
1252 if (masks[1] & devc->trigger.risingmask)
1253 add_trigger_function(OP_RISE, FUNC_OR, 1, 0, &lut->m3);
1254 if (masks[1] & devc->trigger.fallingmask)
1255 add_trigger_function(OP_FALL, FUNC_OR, 1, 0, &lut->m3);
1257 /* Only value/mask trigger. */
1261 /* Triggertype: event. */
1262 lut->params.selres = 3;
1267 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
1270 struct dev_context *devc;
1271 struct clockselect_50 clockselect;
1272 int frac, triggerpin, ret;
1273 uint8_t triggerselect = 0;
1274 struct triggerinout triggerinout_conf;
1275 struct triggerlut lut;
1277 if (sdi->status != SR_ST_ACTIVE)
1278 return SR_ERR_DEV_CLOSED;
1282 if (configure_probes(sdi) != SR_OK) {
1283 sr_err("Failed to configure probes.");
1287 /* If the samplerate has not been set, default to 200 kHz. */
1288 if (devc->cur_firmware == -1) {
1289 if ((ret = set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
1293 /* Enter trigger programming mode. */
1294 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
1296 /* 100 and 200 MHz mode. */
1297 if (devc->cur_samplerate >= SR_MHZ(100)) {
1298 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
1300 /* Find which pin to trigger on from mask. */
1301 for (triggerpin = 0; triggerpin < 8; ++triggerpin)
1302 if ((devc->trigger.risingmask | devc->trigger.fallingmask) &
1306 /* Set trigger pin and light LED on trigger. */
1307 triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7);
1309 /* Default rising edge. */
1310 if (devc->trigger.fallingmask)
1311 triggerselect |= 1 << 3;
1313 /* All other modes. */
1314 } else if (devc->cur_samplerate <= SR_MHZ(50)) {
1315 build_basic_trigger(&lut, devc);
1317 sigma_write_trigger_lut(&lut, devc);
1319 triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0);
1322 /* Setup trigger in and out pins to default values. */
1323 memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
1324 triggerinout_conf.trgout_bytrigger = 1;
1325 triggerinout_conf.trgout_enable = 1;
1327 sigma_write_register(WRITE_TRIGGER_OPTION,
1328 (uint8_t *) &triggerinout_conf,
1329 sizeof(struct triggerinout), devc);
1331 /* Go back to normal mode. */
1332 sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
1334 /* Set clock select register. */
1335 if (devc->cur_samplerate == SR_MHZ(200))
1336 /* Enable 4 probes. */
1337 sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc);
1338 else if (devc->cur_samplerate == SR_MHZ(100))
1339 /* Enable 8 probes. */
1340 sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc);
1343 * 50 MHz mode (or fraction thereof). Any fraction down to
1344 * 50 MHz / 256 can be used, but is not supported by sigrok API.
1346 frac = SR_MHZ(50) / devc->cur_samplerate - 1;
1348 clockselect.async = 0;
1349 clockselect.fraction = frac;
1350 clockselect.disabled_probes = 0;
1352 sigma_write_register(WRITE_CLOCK_SELECT,
1353 (uint8_t *) &clockselect,
1354 sizeof(clockselect), devc);
1357 /* Setup maximum post trigger time. */
1358 sigma_set_register(WRITE_POST_TRIGGER,
1359 (devc->capture_ratio * 255) / 100, devc);
1361 /* Start acqusition. */
1362 gettimeofday(&devc->start_tv, 0);
1363 sigma_set_register(WRITE_MODE, 0x0d, devc);
1365 devc->cb_data = cb_data;
1367 /* Send header packet to the session bus. */
1368 std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
1370 /* Add capture source. */
1371 sr_source_add(0, G_IO_IN, 10, receive_data, (void *)sdi);
1373 devc->state.state = SIGMA_CAPTURE;
1378 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1380 struct dev_context *devc;
1385 sr_source_remove(0);
1387 if (!(devc = sdi->priv)) {
1388 sr_err("%s: sdi->priv was NULL", __func__);
1392 /* Stop acquisition. */
1393 sigma_set_register(WRITE_MODE, 0x11, devc);
1395 /* Set SDRAM Read Enable. */
1396 sigma_set_register(WRITE_MODE, 0x02, devc);
1398 /* Get the current position. */
1399 sigma_read_pos(&devc->state.stoppos, &devc->state.triggerpos, devc);
1401 /* Check if trigger has fired. */
1402 modestatus = sigma_get_register(READ_MODE, devc);
1403 if (modestatus & 0x20)
1404 devc->state.triggerchunk = devc->state.triggerpos / 512;
1406 devc->state.triggerchunk = -1;
1408 devc->state.chunks_downloaded = 0;
1410 devc->state.state = SIGMA_DOWNLOAD;
1415 SR_PRIV struct sr_dev_driver asix_sigma_driver_info = {
1416 .name = "asix-sigma",
1417 .longname = "ASIX SIGMA/SIGMA2",
1420 .cleanup = hw_cleanup,
1422 .dev_list = hw_dev_list,
1423 .dev_clear = clear_instances,
1424 .config_get = config_get,
1425 .config_set = config_set,
1426 .config_list = config_list,
1427 .dev_open = hw_dev_open,
1428 .dev_close = hw_dev_close,
1429 .dev_acquisition_start = hw_dev_acquisition_start,
1430 .dev_acquisition_stop = hw_dev_acquisition_stop,