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 TRIGGER_TYPE "rf10"
41 SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
42 static struct sr_dev_driver *di = &asix_sigma_driver_info;
43 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
46 * The ASIX Sigma supports arbitrary integer frequency divider in
47 * the 50MHz mode. The divider is in range 1...256 , allowing for
48 * very precise sampling rate selection. This driver supports only
49 * a subset of the sampling rates.
51 static const uint64_t samplerates[] = {
52 SR_KHZ(200), /* div=250 */
53 SR_KHZ(250), /* div=200 */
54 SR_KHZ(500), /* div=100 */
55 SR_MHZ(1), /* div=50 */
56 SR_MHZ(5), /* div=10 */
57 SR_MHZ(10), /* div=5 */
58 SR_MHZ(25), /* div=2 */
59 SR_MHZ(50), /* div=1 */
60 SR_MHZ(100), /* Special FW needed */
61 SR_MHZ(200), /* Special FW needed */
65 * Channel numbers seem to go from 1-16, according to this image:
66 * http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
67 * (the cable has two additional GND pins, and a TI and TO pin)
69 static const char *channel_names[] = {
70 "1", "2", "3", "4", "5", "6", "7", "8",
71 "9", "10", "11", "12", "13", "14", "15", "16",
74 static const int32_t hwcaps[] = {
75 SR_CONF_LOGIC_ANALYZER,
78 SR_CONF_CAPTURE_RATIO,
80 SR_CONF_LIMIT_SAMPLES,
83 /* Initialize the logic analyzer mode. */
84 static uint8_t logic_mode_start[] = {
85 0x00, 0x40, 0x0f, 0x25, 0x35, 0x40,
86 0x2a, 0x3a, 0x40, 0x03, 0x20, 0x38,
89 static const char *sigma_firmware_files[] = {
90 /* 50 MHz, supports 8 bit fractions */
91 FIRMWARE_DIR "/asix-sigma-50.fw",
93 FIRMWARE_DIR "/asix-sigma-100.fw",
95 FIRMWARE_DIR "/asix-sigma-200.fw",
96 /* Synchronous clock from pin */
97 FIRMWARE_DIR "/asix-sigma-50sync.fw",
98 /* Frequency counter */
99 FIRMWARE_DIR "/asix-sigma-phasor.fw",
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 void clear_helper(void *priv)
385 struct dev_context *devc;
389 ftdi_deinit(&devc->ftdic);
392 static int dev_clear(void)
394 return std_dev_clear(di, clear_helper);
397 static int init(struct sr_context *sr_ctx)
399 return std_init(sr_ctx, di, LOG_PREFIX);
402 static GSList *scan(GSList *options)
404 struct sr_dev_inst *sdi;
405 struct sr_channel *ch;
406 struct drv_context *drvc;
407 struct dev_context *devc;
409 struct ftdi_device_list *devlist;
421 if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
422 sr_err("%s: devc malloc failed", __func__);
426 ftdi_init(&devc->ftdic);
428 /* Look for SIGMAs. */
430 if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
431 USB_VENDOR, USB_PRODUCT)) <= 0) {
433 sr_err("ftdi_usb_find_all(): %d", ret);
437 /* Make sure it's a version 1 or 2 SIGMA. */
438 ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
439 serial_txt, sizeof(serial_txt));
440 sscanf(serial_txt, "%x", &serial);
442 if (serial < 0xa6010000 || serial > 0xa602ffff) {
443 sr_err("Only SIGMA and SIGMA2 are supported "
444 "in this version of libsigrok.");
448 sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);
450 devc->cur_samplerate = 0;
452 devc->limit_msec = 0;
453 devc->cur_firmware = -1;
454 devc->num_channels = 0;
455 devc->samples_per_event = 0;
456 devc->capture_ratio = 50;
457 devc->use_triggers = 0;
459 /* Register SIGMA device. */
460 if (!(sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING, USB_VENDOR_NAME,
461 USB_MODEL_NAME, NULL))) {
462 sr_err("%s: sdi was NULL", __func__);
467 for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
468 ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
472 sdi->channels = g_slist_append(sdi->channels, ch);
475 devices = g_slist_append(devices, sdi);
476 drvc->instances = g_slist_append(drvc->instances, sdi);
479 /* We will open the device again when we need it. */
480 ftdi_list_free(&devlist);
485 ftdi_deinit(&devc->ftdic);
490 static GSList *dev_list(void)
492 return ((struct drv_context *)(di->priv))->instances;
496 * Configure the FPGA for bitbang mode.
497 * This sequence is documented in section 2. of the ASIX Sigma programming
498 * manual. This sequence is necessary to configure the FPGA in the Sigma
499 * into Bitbang mode, in which it can be programmed with the firmware.
501 static int sigma_fpga_init_bitbang(struct dev_context *devc)
503 uint8_t suicide[] = {
504 0x84, 0x84, 0x88, 0x84, 0x88, 0x84, 0x88, 0x84,
506 uint8_t init_array[] = {
507 0x01, 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01,
510 int i, ret, timeout = 10000;
513 /* Section 2. part 1), do the FPGA suicide. */
514 sigma_write(suicide, sizeof(suicide), devc);
515 sigma_write(suicide, sizeof(suicide), devc);
516 sigma_write(suicide, sizeof(suicide), devc);
517 sigma_write(suicide, sizeof(suicide), devc);
519 /* Section 2. part 2), do pulse on D1. */
520 sigma_write(init_array, sizeof(init_array), devc);
521 ftdi_usb_purge_buffers(&devc->ftdic);
523 /* Wait until the FPGA asserts D6/INIT_B. */
524 for (i = 0; i < timeout; i++) {
525 ret = sigma_read(&data, 1, devc);
528 /* Test if pin D6 got asserted. */
531 /* The D6 was not asserted yet, wait a bit. */
535 return SR_ERR_TIMEOUT;
538 static int upload_firmware(int firmware_idx, struct dev_context *devc)
544 unsigned char result[32];
545 const char *firmware = sigma_firmware_files[firmware_idx];
547 /* Make sure it's an ASIX SIGMA. */
548 if ((ret = ftdi_usb_open_desc(&devc->ftdic,
549 USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
550 sr_err("ftdi_usb_open failed: %s",
551 ftdi_get_error_string(&devc->ftdic));
555 if ((ret = ftdi_set_bitmode(&devc->ftdic, 0xdf, BITMODE_BITBANG)) < 0) {
556 sr_err("ftdi_set_bitmode failed: %s",
557 ftdi_get_error_string(&devc->ftdic));
561 /* Four times the speed of sigmalogan - Works well. */
562 if ((ret = ftdi_set_baudrate(&devc->ftdic, 750000)) < 0) {
563 sr_err("ftdi_set_baudrate failed: %s",
564 ftdi_get_error_string(&devc->ftdic));
568 /* Initialize the FPGA for firmware upload. */
569 ret = sigma_fpga_init_bitbang(devc);
573 /* Prepare firmware. */
574 if ((ret = bin2bitbang(firmware, &buf, &buf_size)) != SR_OK) {
575 sr_err("An error occured while reading the firmware: %s",
580 /* Upload firmare. */
581 sr_info("Uploading firmware file '%s'.", firmware);
582 sigma_write(buf, buf_size, devc);
586 if ((ret = ftdi_set_bitmode(&devc->ftdic, 0x00, BITMODE_RESET)) < 0) {
587 sr_err("ftdi_set_bitmode failed: %s",
588 ftdi_get_error_string(&devc->ftdic));
592 ftdi_usb_purge_buffers(&devc->ftdic);
594 /* Discard garbage. */
595 while (1 == sigma_read(&pins, 1, devc))
598 /* Initialize the logic analyzer mode. */
599 sigma_write(logic_mode_start, sizeof(logic_mode_start), devc);
601 /* Expect a 3 byte reply. */
602 ret = sigma_read(result, 3, devc);
604 result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) {
605 sr_err("Configuration failed. Invalid reply received.");
609 devc->cur_firmware = firmware_idx;
611 sr_info("Firmware uploaded.");
616 static int dev_open(struct sr_dev_inst *sdi)
618 struct dev_context *devc;
623 /* Make sure it's an ASIX SIGMA. */
624 if ((ret = ftdi_usb_open_desc(&devc->ftdic,
625 USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
627 sr_err("ftdi_usb_open failed: %s",
628 ftdi_get_error_string(&devc->ftdic));
633 sdi->status = SR_ST_ACTIVE;
638 static int set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate)
640 struct dev_context *devc;
647 for (i = 0; i < ARRAY_SIZE(samplerates); i++) {
648 if (samplerates[i] == samplerate)
651 if (samplerates[i] == 0)
652 return SR_ERR_SAMPLERATE;
654 if (samplerate <= SR_MHZ(50)) {
655 ret = upload_firmware(0, devc);
656 devc->num_channels = 16;
658 if (samplerate == SR_MHZ(100)) {
659 ret = upload_firmware(1, devc);
660 devc->num_channels = 8;
662 else if (samplerate == SR_MHZ(200)) {
663 ret = upload_firmware(2, devc);
664 devc->num_channels = 4;
667 devc->cur_samplerate = samplerate;
668 devc->period_ps = 1000000000000ULL / samplerate;
669 devc->samples_per_event = 16 / devc->num_channels;
670 devc->state.state = SIGMA_IDLE;
676 * In 100 and 200 MHz mode, only a single pin rising/falling can be
677 * set as trigger. In other modes, two rising/falling triggers can be set,
678 * in addition to value/mask trigger for any number of channels.
680 * The Sigma supports complex triggers using boolean expressions, but this
681 * has not been implemented yet.
683 static int configure_channels(const struct sr_dev_inst *sdi)
685 struct dev_context *devc = sdi->priv;
686 const struct sr_channel *ch;
691 memset(&devc->trigger, 0, sizeof(struct sigma_trigger));
693 for (l = sdi->channels; l; l = l->next) {
694 ch = (struct sr_channel *)l->data;
695 channelbit = 1 << (ch->index);
697 if (!ch->enabled || !ch->trigger)
700 if (devc->cur_samplerate >= SR_MHZ(100)) {
701 /* Fast trigger support. */
703 sr_err("Only a single pin trigger in 100 and "
704 "200MHz mode is supported.");
707 if (ch->trigger[0] == 'f')
708 devc->trigger.fallingmask |= channelbit;
709 else if (ch->trigger[0] == 'r')
710 devc->trigger.risingmask |= channelbit;
712 sr_err("Only rising/falling trigger in 100 "
713 "and 200MHz mode is supported.");
719 /* Simple trigger support (event). */
720 if (ch->trigger[0] == '1') {
721 devc->trigger.simplevalue |= channelbit;
722 devc->trigger.simplemask |= channelbit;
724 else if (ch->trigger[0] == '0') {
725 devc->trigger.simplevalue &= ~channelbit;
726 devc->trigger.simplemask |= channelbit;
728 else if (ch->trigger[0] == 'f') {
729 devc->trigger.fallingmask |= channelbit;
732 else if (ch->trigger[0] == 'r') {
733 devc->trigger.risingmask |= channelbit;
738 * Actually, Sigma supports 2 rising/falling triggers,
739 * but they are ORed and the current trigger syntax
740 * does not permit ORed triggers.
742 if (trigger_set > 1) {
743 sr_err("Only 1 rising/falling trigger "
750 devc->use_triggers = 1;
756 static int dev_close(struct sr_dev_inst *sdi)
758 struct dev_context *devc;
763 if (sdi->status == SR_ST_ACTIVE)
764 ftdi_usb_close(&devc->ftdic);
766 sdi->status = SR_ST_INACTIVE;
771 static int cleanup(void)
776 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
777 const struct sr_channel_group *cg)
779 struct dev_context *devc;
784 case SR_CONF_SAMPLERATE:
787 *data = g_variant_new_uint64(devc->cur_samplerate);
798 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
799 const struct sr_channel_group *cg)
801 struct dev_context *devc;
802 uint64_t num_samples;
807 if (sdi->status != SR_ST_ACTIVE)
808 return SR_ERR_DEV_CLOSED;
813 case SR_CONF_SAMPLERATE:
814 ret = set_samplerate(sdi, g_variant_get_uint64(data));
816 case SR_CONF_LIMIT_MSEC:
817 devc->limit_msec = g_variant_get_uint64(data);
818 if (devc->limit_msec > 0)
823 case SR_CONF_LIMIT_SAMPLES:
824 num_samples = g_variant_get_uint64(data);
825 devc->limit_msec = num_samples * 1000 / devc->cur_samplerate;
827 case SR_CONF_CAPTURE_RATIO:
828 devc->capture_ratio = g_variant_get_uint64(data);
829 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
841 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
842 const struct sr_channel_group *cg)
851 case SR_CONF_DEVICE_OPTIONS:
852 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
853 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
855 case SR_CONF_SAMPLERATE:
856 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
857 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
858 ARRAY_SIZE(samplerates), sizeof(uint64_t));
859 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
860 *data = g_variant_builder_end(&gvb);
862 case SR_CONF_TRIGGER_TYPE:
863 *data = g_variant_new_string(TRIGGER_TYPE);
872 /* Software trigger to determine exact trigger position. */
873 static int get_trigger_offset(uint16_t *samples, uint16_t last_sample,
874 struct sigma_trigger *t)
878 for (i = 0; i < 8; ++i) {
880 last_sample = samples[i-1];
882 /* Simple triggers. */
883 if ((samples[i] & t->simplemask) != t->simplevalue)
887 if ((last_sample & t->risingmask) != 0 || (samples[i] &
888 t->risingmask) != t->risingmask)
892 if ((last_sample & t->fallingmask) != t->fallingmask ||
893 (samples[i] & t->fallingmask) != 0)
899 /* If we did not match, return original trigger pos. */
904 * Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster.
905 * Each event is 20ns apart, and can contain multiple samples.
907 * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart.
908 * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart.
909 * For 50 MHz and below, events contain one sample for each channel,
910 * spread 20 ns apart.
912 static int decode_chunk_ts(uint8_t *buf, uint16_t *lastts,
913 uint16_t *lastsample, int triggerpos,
914 uint16_t limit_chunk, void *cb_data)
916 struct sr_dev_inst *sdi = cb_data;
917 struct dev_context *devc = sdi->priv;
919 uint16_t samples[65536 * devc->samples_per_event];
920 struct sr_datafeed_packet packet;
921 struct sr_datafeed_logic logic;
922 int i, j, k, l, numpad, tosend;
923 size_t n = 0, sent = 0;
924 int clustersize = EVENTS_PER_CLUSTER * devc->samples_per_event;
929 /* Check if trigger is in this chunk. */
930 if (triggerpos != -1) {
931 if (devc->cur_samplerate <= SR_MHZ(50))
932 triggerpos -= EVENTS_PER_CLUSTER - 1;
937 /* Find in which cluster the trigger occured. */
938 triggerts = triggerpos / 7;
942 for (i = 0; i < 64; ++i) {
943 ts = *(uint16_t *) &buf[i * 16];
944 tsdiff = ts - *lastts;
947 /* Decode partial chunk. */
948 if (limit_chunk && ts > limit_chunk)
951 /* Pad last sample up to current point. */
952 numpad = tsdiff * devc->samples_per_event - clustersize;
954 for (j = 0; j < numpad; ++j)
955 samples[j] = *lastsample;
960 /* Send samples between previous and this timestamp to sigrok. */
963 tosend = MIN(2048, n - sent);
965 packet.type = SR_DF_LOGIC;
966 packet.payload = &logic;
967 logic.length = tosend * sizeof(uint16_t);
969 logic.data = samples + sent;
970 sr_session_send(devc->cb_data, &packet);
976 event = (uint16_t *) &buf[i * 16 + 2];
979 /* For each event in cluster. */
980 for (j = 0; j < 7; ++j) {
982 /* For each sample in event. */
983 for (k = 0; k < devc->samples_per_event; ++k) {
986 /* For each channel. */
987 for (l = 0; l < devc->num_channels; ++l)
988 cur_sample |= (!!(event[j] & (1 << (l *
989 devc->samples_per_event + k)))) << l;
991 samples[n++] = cur_sample;
995 /* Send data up to trigger point (if triggered). */
997 if (i == triggerts) {
999 * Trigger is not always accurate to sample because of
1000 * pipeline delay. However, it always triggers before
1001 * the actual event. We therefore look at the next
1002 * samples to pinpoint the exact position of the trigger.
1004 tosend = get_trigger_offset(samples, *lastsample,
1008 packet.type = SR_DF_LOGIC;
1009 packet.payload = &logic;
1010 logic.length = tosend * sizeof(uint16_t);
1012 logic.data = samples;
1013 sr_session_send(devc->cb_data, &packet);
1018 /* Only send trigger if explicitly enabled. */
1019 if (devc->use_triggers) {
1020 packet.type = SR_DF_TRIGGER;
1021 sr_session_send(devc->cb_data, &packet);
1025 /* Send rest of the chunk to sigrok. */
1029 packet.type = SR_DF_LOGIC;
1030 packet.payload = &logic;
1031 logic.length = tosend * sizeof(uint16_t);
1033 logic.data = samples + sent;
1034 sr_session_send(devc->cb_data, &packet);
1037 *lastsample = samples[n - 1];
1043 static void download_capture(struct sr_dev_inst *sdi)
1045 struct dev_context *devc;
1046 const int chunks_per_read = 32;
1047 unsigned char buf[chunks_per_read * CHUNK_SIZE];
1048 int bufsz, i, numchunks, newchunks;
1050 sr_info("Downloading sample data.");
1053 devc->state.chunks_downloaded = 0;
1054 numchunks = (devc->state.stoppos + 511) / 512;
1055 newchunks = MIN(chunks_per_read, numchunks - devc->state.chunks_downloaded);
1057 bufsz = sigma_read_dram(devc->state.chunks_downloaded, newchunks, buf, devc);
1058 /* TODO: Check bufsz. For now, just avoid compiler warnings. */
1061 /* Find first ts. */
1062 if (devc->state.chunks_downloaded == 0) {
1063 devc->state.lastts = RL16(buf) - 1;
1064 devc->state.lastsample = 0;
1067 /* Decode chunks and send them to sigrok. */
1068 for (i = 0; i < newchunks; ++i) {
1069 int limit_chunk = 0;
1071 /* The last chunk may potentially be only in part. */
1072 if (devc->state.chunks_downloaded == numchunks - 1) {
1073 /* Find the last valid timestamp */
1074 limit_chunk = devc->state.stoppos % 512 + devc->state.lastts;
1077 if (devc->state.chunks_downloaded + i == devc->state.triggerchunk)
1078 decode_chunk_ts(buf + (i * CHUNK_SIZE),
1079 &devc->state.lastts,
1080 &devc->state.lastsample,
1081 devc->state.triggerpos & 0x1ff,
1084 decode_chunk_ts(buf + (i * CHUNK_SIZE),
1085 &devc->state.lastts,
1086 &devc->state.lastsample,
1087 -1, limit_chunk, sdi);
1089 ++devc->state.chunks_downloaded;
1094 static int receive_data(int fd, int revents, void *cb_data)
1096 struct sr_dev_inst *sdi;
1097 struct dev_context *devc;
1098 struct sr_datafeed_packet packet;
1099 uint64_t running_msec;
1110 /* Get the current position. */
1111 sigma_read_pos(&devc->state.stoppos, &devc->state.triggerpos, devc);
1113 if (devc->state.state == SIGMA_IDLE)
1116 if (devc->state.state == SIGMA_CAPTURE) {
1117 numchunks = (devc->state.stoppos + 511) / 512;
1119 /* Check if the timer has expired, or memory is full. */
1120 gettimeofday(&tv, 0);
1121 running_msec = (tv.tv_sec - devc->start_tv.tv_sec) * 1000 +
1122 (tv.tv_usec - devc->start_tv.tv_usec) / 1000;
1124 if (running_msec < devc->limit_msec && numchunks < 32767)
1125 /* Still capturing. */
1128 /* Stop acquisition. */
1129 sigma_set_register(WRITE_MODE, 0x11, devc);
1131 /* Set SDRAM Read Enable. */
1132 sigma_set_register(WRITE_MODE, 0x02, devc);
1134 /* Get the current position. */
1135 sigma_read_pos(&devc->state.stoppos, &devc->state.triggerpos, devc);
1137 /* Check if trigger has fired. */
1138 modestatus = sigma_get_register(READ_MODE, devc);
1139 if (modestatus & 0x20)
1140 devc->state.triggerchunk = devc->state.triggerpos / 512;
1142 devc->state.triggerchunk = -1;
1144 /* Transfer captured data from device. */
1145 download_capture(sdi);
1148 packet.type = SR_DF_END;
1149 sr_session_send(sdi, &packet);
1151 dev_acquisition_stop(sdi, sdi);
1157 /* Build a LUT entry used by the trigger functions. */
1158 static void build_lut_entry(uint16_t value, uint16_t mask, uint16_t *entry)
1162 /* For each quad channel. */
1163 for (i = 0; i < 4; ++i) {
1166 /* For each bit in LUT. */
1167 for (j = 0; j < 16; ++j)
1169 /* For each channel in quad. */
1170 for (k = 0; k < 4; ++k) {
1171 bit = 1 << (i * 4 + k);
1173 /* Set bit in entry */
1175 ((!(value & bit)) !=
1177 entry[i] &= ~(1 << j);
1182 /* Add a logical function to LUT mask. */
1183 static void add_trigger_function(enum triggerop oper, enum triggerfunc func,
1184 int index, int neg, uint16_t *mask)
1187 int x[2][2], tmp, a, b, aset, bset, rset;
1189 memset(x, 0, 4 * sizeof(int));
1191 /* Trigger detect condition. */
1221 case OP_NOTRISEFALL:
1227 /* Transpose if neg is set. */
1229 for (i = 0; i < 2; ++i) {
1230 for (j = 0; j < 2; ++j) {
1232 x[i][j] = x[1-i][1-j];
1238 /* Update mask with function. */
1239 for (i = 0; i < 16; ++i) {
1240 a = (i >> (2 * index + 0)) & 1;
1241 b = (i >> (2 * index + 1)) & 1;
1243 aset = (*mask >> i) & 1;
1246 if (func == FUNC_AND || func == FUNC_NAND)
1248 else if (func == FUNC_OR || func == FUNC_NOR)
1250 else if (func == FUNC_XOR || func == FUNC_NXOR)
1253 if (func == FUNC_NAND || func == FUNC_NOR || func == FUNC_NXOR)
1264 * Build trigger LUTs used by 50 MHz and lower sample rates for supporting
1265 * simple pin change and state triggers. Only two transitions (rise/fall) can be
1266 * set at any time, but a full mask and value can be set (0/1).
1268 static int build_basic_trigger(struct triggerlut *lut, struct dev_context *devc)
1271 uint16_t masks[2] = { 0, 0 };
1273 memset(lut, 0, sizeof(struct triggerlut));
1275 /* Contant for simple triggers. */
1278 /* Value/mask trigger support. */
1279 build_lut_entry(devc->trigger.simplevalue, devc->trigger.simplemask,
1282 /* Rise/fall trigger support. */
1283 for (i = 0, j = 0; i < 16; ++i) {
1284 if (devc->trigger.risingmask & (1 << i) ||
1285 devc->trigger.fallingmask & (1 << i))
1286 masks[j++] = 1 << i;
1289 build_lut_entry(masks[0], masks[0], lut->m0d);
1290 build_lut_entry(masks[1], masks[1], lut->m1d);
1292 /* Add glue logic */
1293 if (masks[0] || masks[1]) {
1294 /* Transition trigger. */
1295 if (masks[0] & devc->trigger.risingmask)
1296 add_trigger_function(OP_RISE, FUNC_OR, 0, 0, &lut->m3);
1297 if (masks[0] & devc->trigger.fallingmask)
1298 add_trigger_function(OP_FALL, FUNC_OR, 0, 0, &lut->m3);
1299 if (masks[1] & devc->trigger.risingmask)
1300 add_trigger_function(OP_RISE, FUNC_OR, 1, 0, &lut->m3);
1301 if (masks[1] & devc->trigger.fallingmask)
1302 add_trigger_function(OP_FALL, FUNC_OR, 1, 0, &lut->m3);
1304 /* Only value/mask trigger. */
1308 /* Triggertype: event. */
1309 lut->params.selres = 3;
1314 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
1316 struct dev_context *devc;
1317 struct clockselect_50 clockselect;
1318 int frac, triggerpin, ret;
1319 uint8_t triggerselect = 0;
1320 struct triggerinout triggerinout_conf;
1321 struct triggerlut lut;
1323 if (sdi->status != SR_ST_ACTIVE)
1324 return SR_ERR_DEV_CLOSED;
1328 if (configure_channels(sdi) != SR_OK) {
1329 sr_err("Failed to configure channels.");
1333 /* If the samplerate has not been set, default to 200 kHz. */
1334 if (devc->cur_firmware == -1) {
1335 if ((ret = set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
1339 /* Enter trigger programming mode. */
1340 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
1342 /* 100 and 200 MHz mode. */
1343 if (devc->cur_samplerate >= SR_MHZ(100)) {
1344 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
1346 /* Find which pin to trigger on from mask. */
1347 for (triggerpin = 0; triggerpin < 8; ++triggerpin)
1348 if ((devc->trigger.risingmask | devc->trigger.fallingmask) &
1352 /* Set trigger pin and light LED on trigger. */
1353 triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7);
1355 /* Default rising edge. */
1356 if (devc->trigger.fallingmask)
1357 triggerselect |= 1 << 3;
1359 /* All other modes. */
1360 } else if (devc->cur_samplerate <= SR_MHZ(50)) {
1361 build_basic_trigger(&lut, devc);
1363 sigma_write_trigger_lut(&lut, devc);
1365 triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0);
1368 /* Setup trigger in and out pins to default values. */
1369 memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
1370 triggerinout_conf.trgout_bytrigger = 1;
1371 triggerinout_conf.trgout_enable = 1;
1373 sigma_write_register(WRITE_TRIGGER_OPTION,
1374 (uint8_t *) &triggerinout_conf,
1375 sizeof(struct triggerinout), devc);
1377 /* Go back to normal mode. */
1378 sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
1380 /* Set clock select register. */
1381 if (devc->cur_samplerate == SR_MHZ(200))
1382 /* Enable 4 channels. */
1383 sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc);
1384 else if (devc->cur_samplerate == SR_MHZ(100))
1385 /* Enable 8 channels. */
1386 sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc);
1389 * 50 MHz mode (or fraction thereof). Any fraction down to
1390 * 50 MHz / 256 can be used, but is not supported by sigrok API.
1392 frac = SR_MHZ(50) / devc->cur_samplerate - 1;
1394 clockselect.async = 0;
1395 clockselect.fraction = frac;
1396 clockselect.disabled_channels = 0;
1398 sigma_write_register(WRITE_CLOCK_SELECT,
1399 (uint8_t *) &clockselect,
1400 sizeof(clockselect), devc);
1403 /* Setup maximum post trigger time. */
1404 sigma_set_register(WRITE_POST_TRIGGER,
1405 (devc->capture_ratio * 255) / 100, devc);
1407 /* Start acqusition. */
1408 gettimeofday(&devc->start_tv, 0);
1409 sigma_set_register(WRITE_MODE, 0x0d, devc);
1411 devc->cb_data = cb_data;
1413 /* Send header packet to the session bus. */
1414 std_session_send_df_header(cb_data, LOG_PREFIX);
1416 /* Add capture source. */
1417 sr_source_add(0, G_IO_IN, 10, receive_data, (void *)sdi);
1419 devc->state.state = SIGMA_CAPTURE;
1424 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1426 struct dev_context *devc;
1431 devc->state.state = SIGMA_IDLE;
1433 sr_source_remove(0);
1438 SR_PRIV struct sr_dev_driver asix_sigma_driver_info = {
1439 .name = "asix-sigma",
1440 .longname = "ASIX SIGMA/SIGMA2",
1445 .dev_list = dev_list,
1446 .dev_clear = dev_clear,
1447 .config_get = config_get,
1448 .config_set = config_set,
1449 .config_list = config_list,
1450 .dev_open = dev_open,
1451 .dev_close = dev_close,
1452 .dev_acquisition_start = dev_acquisition_start,
1453 .dev_acquisition_stop = dev_acquisition_stop,