2 * This file is part of the libsigrok project.
4 * Copyright (C) 2020 Florian Schmidt <schmidt_florian@gmx.de>
5 * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
6 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
7 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include <libsigrok/libsigrok.h>
28 #include "libsigrok-internal.h"
31 #define UC_FIRMWARE "kingst-la-%04x.fw"
32 #define FPGA_FW_LA2016 "kingst-la2016-fpga.bitstream"
33 #define FPGA_FW_LA2016A "kingst-la2016a1-fpga.bitstream"
34 #define FPGA_FW_LA1016 "kingst-la1016-fpga.bitstream"
35 #define FPGA_FW_LA1016A "kingst-la1016a1-fpga.bitstream"
37 #define MAX_SAMPLE_RATE_LA2016 SR_MHZ(200)
38 #define MAX_SAMPLE_RATE_LA1016 SR_MHZ(100)
39 #define MAX_SAMPLE_DEPTH 10e9
40 #define MAX_PWM_FREQ SR_MHZ(20)
41 #define PWM_CLOCK SR_MHZ(200) /* this is 200MHz for both the LA2016 and LA1016 */
43 /* usb vendor class control requests to the cypress FX2 microcontroller */
44 #define CMD_FPGA_ENABLE 0x10
45 #define CMD_FPGA_SPI 0x20 /* access registers in the FPGA over SPI bus, ctrl_in reads, ctrl_out writes */
46 #define CMD_BULK_START 0x30 /* begin transfer of capture data via usb endpoint 6 IN */
47 #define CMD_BULK_RESET 0x38 /* flush FX2 usb endpoint 6 IN fifos */
48 #define CMD_FPGA_INIT 0x50 /* used before and after FPGA bitstream loading */
49 #define CMD_KAUTH 0x60 /* communicate with authentication ic U10, not used */
50 #define CMD_EEPROM 0xa2 /* ctrl_in reads, ctrl_out writes */
53 * fpga spi register addresses for control request CMD_FPGA_SPI:
54 * There are around 60 byte-wide registers within the fpga and
55 * these are the base addresses used for accessing them.
56 * On the spi bus, the msb of the address byte is set for read
57 * and cleared for write, but that is handled by the fx2 mcu
58 * as appropriate. In this driver code just use IN transactions
59 * to read, OUT to write.
61 #define REG_RUN 0x00 /* read capture status, write capture start */
62 #define REG_PWM_EN 0x02 /* user pwm channels on/off */
63 #define REG_CAPT_MODE 0x03 /* set to 0x00 for capture to sdram, 0x01 bypass sdram for streaming */
64 #define REG_BULK 0x08 /* write start address and number of bytes for capture data bulk upload */
65 #define REG_SAMPLING 0x10 /* write capture config, read capture data location in sdram */
66 #define REG_TRIGGER 0x20 /* write level and edge trigger config */
67 #define REG_THRESHOLD 0x68 /* write two pwm configs to control input threshold dac */
68 #define REG_PWM1 0x70 /* write config for user pwm1 */
69 #define REG_PWM2 0x78 /* write config for user pwm2 */
71 static int ctrl_in(const struct sr_dev_inst *sdi,
72 uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
73 void *data, uint16_t wLength)
75 struct sr_usb_dev_inst *usb;
80 if ((ret = libusb_control_transfer(
81 usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
82 bRequest, wValue, wIndex, (unsigned char *)data, wLength,
83 DEFAULT_TIMEOUT_MS)) != wLength) {
84 sr_err("failed to read %d bytes via ctrl-in %d %#x, %d: %s.",
85 wLength, bRequest, wValue, wIndex,
86 libusb_error_name(ret));
93 static int ctrl_out(const struct sr_dev_inst *sdi,
94 uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
95 void *data, uint16_t wLength)
97 struct sr_usb_dev_inst *usb;
102 if ((ret = libusb_control_transfer(
103 usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT,
104 bRequest, wValue, wIndex, (unsigned char*)data, wLength,
105 DEFAULT_TIMEOUT_MS)) != wLength) {
106 sr_err("failed to write %d bytes via ctrl-out %d %#x, %d: %s.",
107 wLength, bRequest, wValue, wIndex,
108 libusb_error_name(ret));
115 static int upload_fpga_bitstream(const struct sr_dev_inst *sdi, const char *bitstream_fname)
117 struct dev_context *devc;
118 struct drv_context *drvc;
119 struct sr_usb_dev_inst *usb;
120 struct sr_resource bitstream;
121 uint8_t buffer[sizeof(uint32_t)];
128 unsigned int zero_pad_to = 0x2c000;
131 drvc = sdi->driver->context;
134 sr_info("Uploading FPGA bitstream '%s'.", bitstream_fname);
136 ret = sr_resource_open(drvc->sr_ctx, &bitstream, SR_RESOURCE_FIRMWARE, bitstream_fname);
138 sr_err("could not find fpga firmware %s!", bitstream_fname);
142 devc->bitstream_size = (uint32_t)bitstream.size;
144 write_u32le_inc(&wrptr, devc->bitstream_size);
145 if ((ret = ctrl_out(sdi, CMD_FPGA_INIT, 0x00, 0, buffer, wrptr - buffer)) != SR_OK) {
146 sr_err("failed to give upload init command");
147 sr_resource_close(drvc->sr_ctx, &bitstream);
153 if (pos < bitstream.size) {
154 len = (int)sr_resource_read(drvc->sr_ctx, &bitstream, &block, sizeof(block));
156 sr_err("failed to read from fpga bitstream!");
157 sr_resource_close(drvc->sr_ctx, &bitstream);
161 // fill with zero's until zero_pad_to
162 len = zero_pad_to - pos;
163 if ((unsigned)len > sizeof(block))
165 memset(&block, 0, len);
170 ret = libusb_bulk_transfer(usb->devhdl, 2, (unsigned char*)&block[0], len, &act_len, DEFAULT_TIMEOUT_MS);
172 sr_dbg("failed to write fpga bitstream block at %#x len %d: %s.", pos, (int)len, libusb_error_name(ret));
176 if (act_len != len) {
177 sr_dbg("failed to write fpga bitstream block at %#x len %d: act_len is %d.", pos, (int)len, act_len);
183 sr_resource_close(drvc->sr_ctx, &bitstream);
186 sr_info("FPGA bitstream upload (%" PRIu64 " bytes) done.", bitstream.size);
188 if ((ret = ctrl_in(sdi, CMD_FPGA_INIT, 0x00, 0, &cmd_resp, sizeof(cmd_resp))) != SR_OK) {
189 sr_err("failed to read response after FPGA bitstream upload");
193 sr_err("after fpga bitstream upload command response is 0x%02x, expect 0!", cmd_resp);
199 if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x01, 0, NULL, 0)) != SR_OK) {
200 sr_err("failed enable fpga");
208 static int set_threshold_voltage(const struct sr_dev_inst *sdi, float voltage)
210 struct dev_context *devc;
215 uint16_t duty_R79,duty_R56;
216 uint8_t buf[2 * sizeof(uint16_t)];
219 /* clamp threshold setting within valid range for LA2016 */
223 else if (voltage < -4.0) {
228 * The fpga has two programmable pwm outputs which feed a dac that
229 * is used to adjust input offset. The dac changes the input
230 * swing around the fixed fpga input threshold.
231 * The two pwm outputs can be seen on R79 and R56 respectvely.
232 * Frequency is fixed at 100kHz and duty is varied.
233 * The R79 pwm uses just three settings.
234 * The R56 pwm varies with required threshold and its behaviour
235 * also changes depending on the setting of R79 PWM.
239 * calculate required pwm duty register values from requested threshold voltage
240 * see last page of schematic (on wiki) for an explanation of these numbers
242 if (voltage >= 2.9) {
243 duty_R79 = 0; /* this pwm is off (0V)*/
244 duty_R56 = (uint16_t)(302 * voltage - 363);
246 else if (voltage <= -0.4) {
247 duty_R79 = 0x02D7; /* 72% duty */
248 duty_R56 = (uint16_t)(302 * voltage + 1090);
251 duty_R79 = 0x00f2; /* 25% duty */
252 duty_R56 = (uint16_t)(302 * voltage + 121);
255 /* clamp duty register values at sensible limits */
259 else if (duty_R56 > 1100) {
263 sr_dbg("set threshold voltage %.2fV", voltage);
264 sr_dbg("duty_R56=0x%04x, duty_R79=0x%04x", duty_R56, duty_R79);
267 write_u16le_inc(&wrptr, duty_R56);
268 write_u16le_inc(&wrptr, duty_R79);
270 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_THRESHOLD, 0, buf, wrptr - buf);
272 sr_err("error setting new threshold voltage of %.2fV", voltage);
275 devc->threshold_voltage = voltage;
280 static int enable_pwm(const struct sr_dev_inst *sdi, uint8_t p1, uint8_t p2)
282 struct dev_context *devc;
289 if (p1) cfg |= 1 << 0;
290 if (p2) cfg |= 1 << 1;
292 sr_dbg("set pwm enable %d %d", p1, p2);
293 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_PWM_EN, 0, &cfg, sizeof(cfg));
295 sr_err("error setting new pwm enable 0x%02x", cfg);
298 devc->pwm_setting[0].enabled = (p1) ? 1 : 0;
299 devc->pwm_setting[1].enabled = (p2) ? 1 : 0;
304 static int set_pwm(const struct sr_dev_inst *sdi, uint8_t which, float freq, float duty)
306 int CTRL_PWM[] = { REG_PWM1, REG_PWM2 };
307 struct dev_context *devc;
308 pwm_setting_dev_t cfg;
309 pwm_setting_t *setting;
311 uint8_t buf[2 * sizeof(uint32_t)];
316 if (which < 1 || which > 2) {
317 sr_err("invalid pwm channel: %d", which);
320 if (freq > MAX_PWM_FREQ) {
321 sr_err("pwm frequency too high: %.1f", freq);
324 if (duty > 100 || duty < 0) {
325 sr_err("invalid pwm percentage: %f", duty);
329 cfg.period = (uint32_t)(PWM_CLOCK / freq);
330 cfg.duty = (uint32_t)(0.5f + (cfg.period * duty / 100.));
331 sr_dbg("set pwm%d period %d, duty %d", which, cfg.period, cfg.duty);
334 write_u32le_inc(&wrptr, cfg.period);
335 write_u32le_inc(&wrptr, cfg.duty);
336 ret = ctrl_out(sdi, CMD_FPGA_SPI, CTRL_PWM[which - 1], 0, buf, wrptr - buf);
338 sr_err("error setting new pwm%d config %d %d", which, cfg.period, cfg.duty);
341 setting = &devc->pwm_setting[which - 1];
342 setting->freq = freq;
343 setting->duty = duty;
348 static int set_defaults(const struct sr_dev_inst *sdi)
350 struct dev_context *devc;
355 devc->capture_ratio = 5; /* percent */
356 devc->cur_channels = 0xffff;
357 devc->limit_samples = 5000000;
358 devc->cur_samplerate = SR_MHZ(100);
360 ret = set_threshold_voltage(sdi, devc->threshold_voltage);
364 ret = enable_pwm(sdi, 0, 0);
368 ret = set_pwm(sdi, 1, 1e3, 50);
372 ret = set_pwm(sdi, 2, 100e3, 50);
376 ret = enable_pwm(sdi, 1, 1);
383 static int set_trigger_config(const struct sr_dev_inst *sdi)
385 struct dev_context *devc;
386 struct sr_trigger *trigger;
390 struct sr_trigger_stage *stage1;
391 struct sr_trigger_match *match;
394 uint8_t buf[4 * sizeof(uint32_t)];
398 trigger = sr_session_trigger_get(sdi->session);
400 memset(&cfg, 0, sizeof(cfg));
402 cfg.channels = devc->cur_channels;
404 if (trigger && trigger->stages) {
405 stages = trigger->stages;
406 stage1 = stages->data;
408 sr_err("Only one trigger stage supported for now.");
411 channel = stage1->matches;
413 match = channel->data;
414 ch_mask = 1 << match->channel->index;
416 switch (match->match) {
417 case SR_TRIGGER_ZERO:
418 cfg.level |= ch_mask;
419 cfg.high_or_falling &= ~ch_mask;
422 cfg.level |= ch_mask;
423 cfg.high_or_falling |= ch_mask;
425 case SR_TRIGGER_RISING:
426 if ((cfg.enabled & ~cfg.level)) {
427 sr_err("Only one trigger signal with falling-/rising-edge allowed.");
430 cfg.level &= ~ch_mask;
431 cfg.high_or_falling &= ~ch_mask;
433 case SR_TRIGGER_FALLING:
434 if ((cfg.enabled & ~cfg.level)) {
435 sr_err("Only one trigger signal with falling-/rising-edge allowed.");
438 cfg.level &= ~ch_mask;
439 cfg.high_or_falling |= ch_mask;
442 sr_err("Unknown trigger value.");
445 cfg.enabled |= ch_mask;
446 channel = channel->next;
449 sr_dbg("set trigger configuration channels: 0x%04x, "
450 "trigger-enabled 0x%04x, level-triggered 0x%04x, "
451 "high/falling 0x%04x", cfg.channels, cfg.enabled, cfg.level,
452 cfg.high_or_falling);
454 devc->had_triggers_configured = cfg.enabled != 0;
457 write_u32le_inc(&wrptr, cfg.channels);
458 write_u32le_inc(&wrptr, cfg.enabled);
459 write_u32le_inc(&wrptr, cfg.level);
460 write_u32le_inc(&wrptr, cfg.high_or_falling);
461 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_TRIGGER, 16, buf, wrptr - buf);
463 sr_err("error setting trigger config!");
470 static int set_sample_config(const struct sr_dev_inst *sdi)
472 struct dev_context *devc;
473 double clock_divisor;
477 uint8_t buf[2 * sizeof(uint32_t) + 48 / 8 + sizeof(uint16_t)];
481 total = 128 * 1024 * 1024;
483 if (devc->cur_samplerate > devc->max_samplerate) {
484 sr_err("too high sample rate: %" PRIu64, devc->cur_samplerate);
488 clock_divisor = devc->max_samplerate / (double)devc->cur_samplerate;
489 if (clock_divisor > 0xffff)
490 clock_divisor = 0xffff;
491 divisor = (uint16_t)(clock_divisor + 0.5);
492 devc->cur_samplerate = devc->max_samplerate / divisor;
494 if (devc->limit_samples > MAX_SAMPLE_DEPTH) {
495 sr_err("too high sample depth: %" PRIu64, devc->limit_samples);
499 devc->pre_trigger_size = (devc->capture_ratio * devc->limit_samples) / 100;
501 sr_dbg("set sampling configuration %.0fkHz, %d samples, trigger-pos %d%%",
502 devc->cur_samplerate / 1e3, (unsigned int)devc->limit_samples, (unsigned int)devc->capture_ratio);
505 write_u32le_inc(&wrptr, devc->limit_samples);
506 write_u8_inc(&wrptr, 0);
507 write_u32le_inc(&wrptr, devc->pre_trigger_size);
508 write_u32le_inc(&wrptr, ((total * devc->capture_ratio) / 100) & 0xFFFFFF00);
509 write_u16le_inc(&wrptr, divisor);
510 write_u8_inc(&wrptr, 0);
512 ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, wrptr - buf);
514 sr_err("error setting sample config!");
521 /* The run state is read from FPGA registers 1[hi-byte] and 0[lo-byte]
522 * and the bits are interpreted as follows:
526 * bit1 1= writing to sdram
527 * bit2 0= waiting_for_trigger 1=been_triggered
528 * bit3 0= pretrigger_sampling 1=posttrigger_sampling
531 * meaning of bits unknown (but vendor software reads this, so just do the same)
533 * The run state values occur in this order:
534 * 0x85E2: pre-sampling (for samples before trigger position, capture ratio > 0%)
535 * 0x85EA: pre-sampling complete, now waiting for trigger (whilst sampling continuously)
539 static uint16_t run_state(const struct sr_dev_inst *sdi)
542 static uint16_t previous_state = 0;
545 if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, &state, sizeof(state))) != SR_OK) {
546 sr_err("failed to read run state!");
550 /* This function is called about every 50ms.
551 * To avoid filling the log file with redundant information during long captures,
552 * just print a log message if status has changed.
555 if (state != previous_state) {
556 previous_state = state;
557 if ((state & 0x0003) == 0x01) {
558 sr_dbg("run_state: 0x%04x (%s)", state, "idle");
560 else if ((state & 0x000f) == 0x02) {
561 sr_dbg("run_state: 0x%04x (%s)", state, "pre-trigger sampling");
563 else if ((state & 0x000f) == 0x0a) {
564 sr_dbg("run_state: 0x%04x (%s)", state, "sampling, waiting for trigger");
566 else if ((state & 0x000f) == 0x0e) {
567 sr_dbg("run_state: 0x%04x (%s)", state, "post-trigger sampling");
570 sr_dbg("run_state: 0x%04x", state);
577 static int set_run_mode(const struct sr_dev_inst *sdi, uint8_t fast_blinking)
581 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_RUN, 0, &fast_blinking, sizeof(fast_blinking))) != SR_OK) {
582 sr_err("failed to send set-run-mode command %d", fast_blinking);
589 static int get_capture_info(const struct sr_dev_inst *sdi)
591 struct dev_context *devc;
593 uint8_t buf[3 * sizeof(uint32_t)];
594 const uint8_t *rdptr;
598 if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, sizeof(buf))) != SR_OK) {
599 sr_err("failed to read capture info!");
604 devc->info.n_rep_packets = read_u32le_inc(&rdptr);
605 devc->info.n_rep_packets_before_trigger = read_u32le_inc(&rdptr);
606 devc->info.write_pos = read_u32le_inc(&rdptr);
608 sr_dbg("capture info: n_rep_packets: 0x%08x/%d, before_trigger: 0x%08x/%d, write_pos: 0x%08x%d",
609 devc->info.n_rep_packets, devc->info.n_rep_packets,
610 devc->info.n_rep_packets_before_trigger, devc->info.n_rep_packets_before_trigger,
611 devc->info.write_pos, devc->info.write_pos);
613 if (devc->info.n_rep_packets % 5)
614 sr_warn("number of packets is not as expected multiples of 5: %d", devc->info.n_rep_packets);
619 SR_PRIV int la2016_upload_firmware(struct sr_context *sr_ctx, libusb_device *dev, uint16_t product_id)
622 snprintf(fw_file, sizeof(fw_file) - 1, UC_FIRMWARE, product_id);
623 return ezusb_upload_firmware(sr_ctx, dev, USB_CONFIGURATION, fw_file);
626 SR_PRIV int la2016_setup_acquisition(const struct sr_dev_inst *sdi)
628 struct dev_context *devc;
634 ret = set_threshold_voltage(sdi, devc->threshold_voltage);
639 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_CAPT_MODE, 0, &cmd, sizeof(cmd))) != SR_OK) {
640 sr_err("failed to send stop sampling command");
644 ret = set_trigger_config(sdi);
648 ret = set_sample_config(sdi);
655 SR_PRIV int la2016_start_acquisition(const struct sr_dev_inst *sdi)
659 ret = set_run_mode(sdi, 3);
666 static int la2016_stop_acquisition(const struct sr_dev_inst *sdi)
670 ret = set_run_mode(sdi, 0);
677 SR_PRIV int la2016_abort_acquisition(const struct sr_dev_inst *sdi)
680 struct dev_context *devc;
682 ret = la2016_stop_acquisition(sdi);
686 devc = sdi ? sdi->priv : NULL;
687 if (devc && devc->transfer)
688 libusb_cancel_transfer(devc->transfer);
693 static int la2016_has_triggered(const struct sr_dev_inst *sdi)
697 state = run_state(sdi);
699 return (state & 0x3) == 1;
702 static int la2016_start_retrieval(const struct sr_dev_inst *sdi, libusb_transfer_cb_fn cb)
704 struct dev_context *devc;
705 struct sr_usb_dev_inst *usb;
707 uint8_t wrbuf[2 * sizeof(uint32_t)];
715 if ((ret = get_capture_info(sdi)) != SR_OK)
718 devc->n_transfer_packets_to_read = devc->info.n_rep_packets / NUM_PACKETS_IN_CHUNK;
719 devc->n_bytes_to_read = devc->n_transfer_packets_to_read * TRANSFER_PACKET_LENGTH;
720 devc->read_pos = devc->info.write_pos - devc->n_bytes_to_read;
721 devc->n_reps_until_trigger = devc->info.n_rep_packets_before_trigger;
723 sr_dbg("want to read %d tfer-packets starting from pos %d",
724 devc->n_transfer_packets_to_read, devc->read_pos);
726 if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
727 sr_err("failed to reset bulk state");
730 sr_dbg("will read from 0x%08x, 0x%08x bytes", devc->read_pos, devc->n_bytes_to_read);
732 write_u32le_inc(&wrptr, devc->read_pos);
733 write_u32le_inc(&wrptr, devc->n_bytes_to_read);
734 if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_BULK, 0, wrbuf, wrptr - wrbuf)) != SR_OK) {
735 sr_err("failed to send bulk config");
738 if ((ret = ctrl_out(sdi, CMD_BULK_START, 0x00, 0, NULL, 0)) != SR_OK) {
739 sr_err("failed to unblock bulk transfers");
743 to_read = devc->n_bytes_to_read;
744 /* choose a buffer size for all of the usb transfers */
745 if (to_read >= LA2016_USB_BUFSZ)
746 to_read = LA2016_USB_BUFSZ; /* multiple transfers */
747 else /* one transfer, make buffer size some multiple of LA2016_EP6_PKTSZ */
748 to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
749 buffer = g_try_malloc(to_read);
751 sr_err("Failed to allocate %d bytes for bulk transfer", to_read);
752 return SR_ERR_MALLOC;
755 devc->transfer = libusb_alloc_transfer(0);
756 libusb_fill_bulk_transfer(
757 devc->transfer, usb->devhdl,
758 0x86, buffer, to_read,
759 cb, (void *)sdi, DEFAULT_TIMEOUT_MS);
761 if ((ret = libusb_submit_transfer(devc->transfer)) != 0) {
762 sr_err("Failed to submit transfer: %s.", libusb_error_name(ret));
763 libusb_free_transfer(devc->transfer);
764 devc->transfer = NULL;
772 static void send_chunk(struct sr_dev_inst *sdi,
773 const uint8_t *packets, unsigned int num_tfers)
775 struct dev_context *devc;
776 struct sr_datafeed_logic logic;
777 struct sr_datafeed_packet sr_packet;
778 unsigned int max_samples, n_samples, total_samples, free_n_samples;
779 unsigned int i, j, k;
780 int do_signal_trigger;
789 logic.data = devc->convbuffer;
791 sr_packet.type = SR_DF_LOGIC;
792 sr_packet.payload = &logic;
794 max_samples = devc->convbuffer_size / 2;
796 wp = (uint16_t *)devc->convbuffer;
798 do_signal_trigger = 0;
800 if (devc->had_triggers_configured && devc->reading_behind_trigger == 0 && devc->info.n_rep_packets_before_trigger == 0) {
801 std_session_send_df_trigger(sdi);
802 devc->reading_behind_trigger = 1;
806 for (i = 0; i < num_tfers; i++) {
807 for (k = 0; k < NUM_PACKETS_IN_CHUNK; k++) {
808 free_n_samples = max_samples - n_samples;
809 if (free_n_samples < 256 || do_signal_trigger) {
810 logic.length = n_samples * 2;
811 sr_session_send(sdi, &sr_packet);
813 wp = (uint16_t *)devc->convbuffer;
814 if (do_signal_trigger) {
815 std_session_send_df_trigger(sdi);
816 do_signal_trigger = 0;
820 state = read_u16le_inc(&rp);
821 repetitions = read_u8_inc(&rp);
822 for (j = 0; j < repetitions; j++)
825 n_samples += repetitions;
826 total_samples += repetitions;
827 devc->total_samples += repetitions;
828 if (!devc->reading_behind_trigger) {
829 devc->n_reps_until_trigger--;
830 if (devc->n_reps_until_trigger == 0) {
831 devc->reading_behind_trigger = 1;
832 do_signal_trigger = 1;
833 sr_dbg(" here is trigger position after %" PRIu64 " samples, %.6fms",
835 (double)devc->total_samples / devc->cur_samplerate * 1e3);
839 (void)read_u8_inc(&rp); /* Skip sequence number. */
842 logic.length = n_samples * 2;
843 sr_session_send(sdi, &sr_packet);
844 if (do_signal_trigger) {
845 std_session_send_df_trigger(sdi);
848 sr_dbg("send_chunk done after %d samples", total_samples);
851 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
853 struct sr_dev_inst *sdi;
854 struct dev_context *devc;
855 struct sr_usb_dev_inst *usb;
858 sdi = transfer->user_data;
862 sr_dbg("receive_transfer(): status %s received %d bytes.",
863 libusb_error_name(transfer->status), transfer->actual_length);
865 if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
866 sr_err("bulk transfer timeout!");
867 devc->transfer_finished = 1;
869 send_chunk(sdi, transfer->buffer, transfer->actual_length / TRANSFER_PACKET_LENGTH);
871 devc->n_bytes_to_read -= transfer->actual_length;
872 if (devc->n_bytes_to_read) {
873 uint32_t to_read = devc->n_bytes_to_read;
874 /* determine read size for the next usb transfer */
875 if (to_read >= LA2016_USB_BUFSZ)
876 to_read = LA2016_USB_BUFSZ;
877 else /* last transfer, make read size some multiple of LA2016_EP6_PKTSZ */
878 to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
879 libusb_fill_bulk_transfer(
880 transfer, usb->devhdl,
881 0x86, transfer->buffer, to_read,
882 receive_transfer, (void *)sdi, DEFAULT_TIMEOUT_MS);
884 if ((ret = libusb_submit_transfer(transfer)) == 0)
886 sr_err("Failed to submit further transfer: %s.", libusb_error_name(ret));
889 g_free(transfer->buffer);
890 libusb_free_transfer(transfer);
891 devc->transfer_finished = 1;
894 SR_PRIV int la2016_receive_data(int fd, int revents, void *cb_data)
896 const struct sr_dev_inst *sdi;
897 struct dev_context *devc;
898 struct drv_context *drvc;
906 drvc = sdi->driver->context;
908 if (devc->have_trigger == 0) {
909 if (la2016_has_triggered(sdi) == 0) {
910 /* not yet ready for download */
913 devc->have_trigger = 1;
914 devc->transfer_finished = 0;
915 devc->reading_behind_trigger = 0;
916 devc->total_samples = 0;
917 /* we can start retrieving data! */
918 if (la2016_start_retrieval(sdi, receive_transfer) != SR_OK) {
919 sr_err("failed to start retrieval!");
922 sr_dbg("retrieval is started...");
923 std_session_send_df_frame_begin(sdi);
928 tv.tv_sec = tv.tv_usec = 0;
929 libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
931 if (devc->transfer_finished) {
932 sr_dbg("transfer is finished!");
933 std_session_send_df_frame_end(sdi);
935 usb_source_remove(sdi->session, drvc->sr_ctx);
936 std_session_send_df_end(sdi);
938 la2016_stop_acquisition(sdi);
940 g_free(devc->convbuffer);
941 devc->convbuffer = NULL;
943 devc->transfer = NULL;
945 sr_dbg("transfer is now finished");
951 SR_PRIV int la2016_init_device(const struct sr_dev_inst *sdi)
953 struct dev_context *devc;
956 int16_t purchase_date_bcd[2];
962 /* Four bytes of eeprom at 0x20 are purchase year & month in BCD format, with 16bit
963 * complemented checksum; e.g. 2004DFFB = 2020-April.
964 * This helps to identify the age of devices if unknown magic numbers occur.
966 if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x20, 0, purchase_date_bcd, sizeof(purchase_date_bcd))) != SR_OK) {
967 sr_err("failed to read eeprom purchase_date_bcd");
970 sr_dbg("purchase date: 20%02hx-%02hx", (purchase_date_bcd[0]) & 0x00ff, (purchase_date_bcd[0] >> 8) & 0x00ff);
971 if (purchase_date_bcd[0] != (0x0ffff & ~purchase_date_bcd[1])) {
972 sr_err("purchase date: checksum failure");
977 * There are four known kingst logic analyser devices which use this same usb vid and pid:
978 * LA2016, LA1016 and the older revision of each of these. They all use the same hardware
979 * and the same FX2 mcu firmware but each requires a different fpga bitstream. They are
980 * differentiated by a 'magic' byte within the 8 bytes of EEPROM from address 0x08.
991 * It seems that only these magic bytes are used, other bytes shown above are 'don't care'.
992 * Changing the magic byte on newer device to older magic causes OEM software to load
993 * the older fpga bitstream. The device then functions but has channels out of order.
994 * It's likely the bitstreams were changed to move input channel pins due to PCB changes.
996 * magic 9 == LA1016a using "kingst-la1016a1-fpga.bitstream" (latest v1.3.0 PCB, perhaps others)
997 * magic 8 == LA2016a using "kingst-la2016a1-fpga.bitstream" (latest v1.3.0 PCB, perhaps others)
998 * magic 3 == LA1016 using "kingst-la1016-fpga.bitstream"
999 * magic 2 == LA2016 using "kingst-la2016-fpga.bitstream"
1001 * This was all determined by altering the eeprom contents of an LA2016 and LA1016 and observing
1002 * the vendor software actions, either raising errors or loading specific bitstreams.
1005 * An LA1016 cannot be converted to an LA2016 by changing the magic number - the bitstream
1006 * will not authenticate with ic U10, which has different security coding for each device type.
1009 if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x08, 0, &buf, sizeof(buf))) != SR_OK) {
1010 sr_err("failed to read eeprom device identifier bytes");
1015 if (buf[0] == (0x0ff & ~buf[1])) {
1016 /* primary copy of magic passes complement check */
1019 else if (buf[4] == (0x0ff & ~buf[5])) {
1020 /* backup copy of magic passes complement check */
1021 sr_dbg("device_type: using backup copy of magic number");
1025 sr_dbg("device_type: magic number is %hhu", magic);
1027 /* select the correct fpga bitstream for this device */
1030 ret = upload_fpga_bitstream(sdi, FPGA_FW_LA2016);
1031 devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
1034 ret = upload_fpga_bitstream(sdi, FPGA_FW_LA1016);
1035 devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
1038 ret = upload_fpga_bitstream(sdi, FPGA_FW_LA2016A);
1039 devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
1042 ret = upload_fpga_bitstream(sdi, FPGA_FW_LA1016A);
1043 devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
1046 sr_err("device_type: device not supported; magic number indicates this is not a LA2016 or LA1016");
1051 sr_err("failed to upload fpga bitstream");
1055 state = run_state(sdi);
1056 if (state != 0x85e9) {
1057 sr_warn("expect run state to be 0x85e9, but it reads 0x%04x", state);
1060 if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
1061 sr_err("failed to send CMD_BULK_RESET");
1065 sr_dbg("device should be initialized");
1067 return set_defaults(sdi);
1070 SR_PRIV int la2016_deinit_device(const struct sr_dev_inst *sdi)
1074 if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x00, 0, NULL, 0)) != SR_OK) {
1075 sr_err("failed to send deinit command");