2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
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 3 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, see <http://www.gnu.org/licenses/>.
23 static const uint32_t devopts[] = {
24 SR_CONF_LOGIC_ANALYZER,
25 SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
26 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
27 SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
28 SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
29 SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
30 SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
31 SR_CONF_SWAP | SR_CONF_SET,
32 SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
35 static const int32_t trigger_matches[] = {
42 #define STR_PATTERN_NONE "None"
43 #define STR_PATTERN_EXTERNAL "External"
44 #define STR_PATTERN_INTERNAL "Internal"
46 /* Supported methods of test pattern outputs */
49 * Capture pins 31:16 (unbuffered wing) output a test pattern
50 * that can captured on pins 0:15.
54 /** Route test pattern internally to capture buffer. */
58 static const char *patterns[] = {
64 /* Channels are numbered 0-31 (on the PCB silkscreen). */
65 SR_PRIV const char *p_ols_channel_names[] = {
66 "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
67 "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
68 "24", "25", "26", "27", "28", "29", "30", "31",
71 /* Default supported samplerates, can be overridden by device metadata. */
72 static const uint64_t samplerates[] = {
78 static GSList *scan(struct sr_dev_driver *di, GSList *options)
80 struct sr_dev_inst *sdi;
81 struct dev_context *devc;
91 /* Allocate memory for our private device context. */
92 devc = g_malloc0(sizeof(struct dev_context));
94 /* Device-specific settings */
95 devc->max_samplebytes = devc->max_samplerate = devc->protocol_version = 0;
97 /* Acquisition settings */
98 devc->limit_samples = devc->capture_ratio = 0;
99 devc->trigger_at = -1;
100 devc->channel_mask = 0xffffffff;
103 /* Allocate memory for the incoming ftdi data. */
104 devc->ftdi_buf = g_malloc0(FTDI_BUF_SIZE);
106 /* Allocate memory for the FTDI context (ftdic) and initialize it. */
107 if (!(devc->ftdic = ftdi_new())) {
108 sr_err("Failed to initialize libftdi.");
109 goto err_free_ftdi_buf;;
112 /* Try to open the FTDI device */
113 if (p_ols_open(devc) != SR_OK) {
117 /* The discovery procedure is like this: first send the Reset
118 * command (0x00) 5 times, since the device could be anywhere
119 * in a 5-byte command. Then send the ID command (0x02).
120 * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
125 for (i = 0; i < 5; i++) {
126 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
131 sr_err("Could not reset device. Quitting.");
132 goto err_close_ftdic;
134 write_shortcommand(devc, CMD_ID);
136 /* Read the response data. */
137 bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
138 if (bytes_read < 0) {
139 sr_err("Failed to read FTDI data (%d): %s.",
140 bytes_read, ftdi_get_error_string(devc->ftdic));
141 goto err_close_ftdic;
143 if (bytes_read == 0) {
144 goto err_close_ftdic;
147 if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
148 goto err_close_ftdic;
150 /* Definitely using the OLS protocol, check if it supports
151 * the metadata command.
153 write_shortcommand(devc, CMD_METADATA);
155 /* Read the metadata. */
156 bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
157 if (bytes_read < 0) {
158 sr_err("Failed to read FTDI data (%d): %s.",
159 bytes_read, ftdi_get_error_string(devc->ftdic));
160 goto err_close_ftdic;
162 if (bytes_read == 0) {
163 goto err_close_ftdic;
166 /* Close device. We'll reopen it again when we need it. */
169 /* Parse the metadata. */
170 sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
172 /* Configure samplerate and divider. */
173 if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
174 sr_dbg("Failed to set default samplerate (%"PRIu64").",
177 devices = g_slist_append(devices, sdi);
179 return std_scan_complete(di, devices);
184 ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
186 g_free(devc->ftdi_buf);
192 static void clear_helper(void *priv)
194 struct dev_context *devc;
198 ftdi_free(devc->ftdic);
199 g_free(devc->ftdi_buf);
202 static int dev_clear(const struct sr_dev_driver *di)
204 return std_dev_clear(di, clear_helper);
207 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
208 const struct sr_channel_group *cg)
210 struct dev_context *devc;
219 case SR_CONF_SAMPLERATE:
220 *data = g_variant_new_uint64(devc->cur_samplerate);
222 case SR_CONF_CAPTURE_RATIO:
223 *data = g_variant_new_uint64(devc->capture_ratio);
225 case SR_CONF_LIMIT_SAMPLES:
226 *data = g_variant_new_uint64(devc->limit_samples);
228 case SR_CONF_PATTERN_MODE:
229 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
230 *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
231 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
232 *data = g_variant_new_string(STR_PATTERN_INTERNAL);
234 *data = g_variant_new_string(STR_PATTERN_NONE);
237 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
239 case SR_CONF_EXTERNAL_CLOCK:
240 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
249 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
250 const struct sr_channel_group *cg)
252 struct dev_context *devc;
263 case SR_CONF_SAMPLERATE:
264 tmp_u64 = g_variant_get_uint64(data);
265 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
266 return SR_ERR_SAMPLERATE;
267 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
269 case SR_CONF_LIMIT_SAMPLES:
270 tmp_u64 = g_variant_get_uint64(data);
271 if (tmp_u64 < MIN_NUM_SAMPLES)
273 devc->limit_samples = tmp_u64;
276 case SR_CONF_CAPTURE_RATIO:
277 devc->capture_ratio = g_variant_get_uint64(data);
278 if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
283 case SR_CONF_EXTERNAL_CLOCK:
284 if (g_variant_get_boolean(data)) {
285 sr_info("Enabling external clock.");
286 devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
288 sr_info("Disabled external clock.");
289 devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
293 case SR_CONF_PATTERN_MODE:
294 stropt = g_variant_get_string(data, NULL);
297 if (!strcmp(stropt, STR_PATTERN_NONE)) {
298 sr_info("Disabling test modes.");
300 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
301 sr_info("Enabling internal test mode.");
302 flag = FLAG_INTERNAL_TEST_MODE;
303 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
304 sr_info("Enabling external test mode.");
305 flag = FLAG_EXTERNAL_TEST_MODE;
309 if (flag != 0xffff) {
310 devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
311 devc->flag_reg |= flag;
315 if (g_variant_get_boolean(data)) {
316 sr_info("Enabling channel swapping.");
317 devc->flag_reg |= FLAG_SWAP_CHANNELS;
319 sr_info("Disabling channel swapping.");
320 devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
326 if (g_variant_get_boolean(data)) {
327 sr_info("Enabling RLE.");
328 devc->flag_reg |= FLAG_RLE;
330 sr_info("Disabling RLE.");
331 devc->flag_reg &= ~FLAG_RLE;
342 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
343 const struct sr_channel_group *cg)
345 struct dev_context *devc;
346 GVariant *gvar, *grange[2];
348 int num_pols_changrp, i;
353 case SR_CONF_DEVICE_OPTIONS:
354 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
355 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
357 case SR_CONF_SAMPLERATE:
358 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
359 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
360 ARRAY_SIZE(samplerates), sizeof(uint64_t));
361 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
362 *data = g_variant_builder_end(&gvb);
364 case SR_CONF_TRIGGER_MATCH:
365 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
366 trigger_matches, ARRAY_SIZE(trigger_matches),
369 case SR_CONF_PATTERN_MODE:
370 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
372 case SR_CONF_LIMIT_SAMPLES:
376 if (devc->flag_reg & FLAG_RLE)
378 if (devc->max_samplebytes == 0)
379 /* Device didn't specify sample memory size in metadata. */
382 * Channel groups are turned off if no channels in that group are
383 * enabled, making more room for samples for the enabled group.
385 pols_channel_mask(sdi);
386 num_pols_changrp = 0;
387 for (i = 0; i < 4; i++) {
388 if (devc->channel_mask & (0xff << (i * 8)))
391 /* 3 channel groups takes as many bytes as 4 channel groups */
392 if (num_pols_changrp == 3)
393 num_pols_changrp = 4;
394 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
395 if (num_pols_changrp)
396 grange[1] = g_variant_new_uint64(devc->max_samplebytes / num_pols_changrp);
398 grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
399 *data = g_variant_new_tuple(grange, 2);
408 static int dev_open(struct sr_dev_inst *sdi)
410 struct dev_context *devc;
414 return p_ols_open(devc);
417 static int dev_close(struct sr_dev_inst *sdi)
419 struct dev_context *devc;
423 sdi->status = SR_ST_INACTIVE;
425 return p_ols_close(devc);
428 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
430 struct dev_context *devc;
435 cmd = CMD_SET_TRIGGER_MASK + stage * 4;
436 arg[0] = devc->trigger_mask[stage] & 0xff;
437 arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
438 arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
439 arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
440 if (write_longcommand(devc, cmd, arg) != SR_OK)
443 cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
444 arg[0] = devc->trigger_value[stage] & 0xff;
445 arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
446 arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
447 arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
448 if (write_longcommand(devc, cmd, arg) != SR_OK)
451 cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
452 arg[0] = arg[1] = arg[3] = 0x00;
454 if (stage == devc->num_stages)
455 /* Last stage, fire when this one matches. */
456 arg[3] |= TRIGGER_START;
457 if (write_longcommand(devc, cmd, arg) != SR_OK)
460 cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
461 arg[0] = devc->trigger_edge[stage] & 0xff;
462 arg[1] = (devc->trigger_edge[stage] >> 8) & 0xff;
463 arg[2] = (devc->trigger_edge[stage] >> 16) & 0xff;
464 arg[3] = (devc->trigger_edge[stage] >> 24) & 0xff;
465 if (write_longcommand(devc, cmd, arg) != SR_OK)
471 static int disable_trigger(const struct sr_dev_inst *sdi, int stage)
473 struct dev_context *devc;
478 cmd = CMD_SET_TRIGGER_MASK + stage * 4;
479 arg[0] = arg[1] = arg[2] = arg[3] = 0x00;
480 if (write_longcommand(devc, cmd, arg) != SR_OK)
483 cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
484 if (write_longcommand(devc, cmd, arg) != SR_OK)
487 cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
489 if (write_longcommand(devc, cmd, arg) != SR_OK)
492 cmd = CMD_SET_TRIGGER_EDGE + stage * 4;
494 if (write_longcommand(devc, cmd, arg) != SR_OK)
500 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
502 struct dev_context *devc;
503 uint32_t samplecount, readcount, delaycount;
504 uint8_t pols_changrp_mask, arg[4];
506 int num_pols_changrp, samplespercount;
511 pols_channel_mask(sdi);
514 * Enable/disable channel groups in the flag register according to the
515 * channel mask. Calculate this here, because num_pols_changrp is
516 * needed to limit readcount.
518 pols_changrp_mask = 0;
519 num_pols_changrp = 0;
520 for (i = 0; i < 4; i++) {
521 if (devc->channel_mask & (0xff << (i * 8))) {
522 pols_changrp_mask |= (1 << i);
526 /* 3 channel groups takes as many bytes as 4 channel groups */
527 if (num_pols_changrp == 3)
528 num_pols_changrp = 4;
529 /* maximum number of samples (or RLE counts) the buffer memory can hold */
530 devc->max_samples = devc->max_samplebytes / num_pols_changrp;
533 * Limit readcount to prevent reading past the end of the hardware
536 sr_dbg("max_samples = %d", devc->max_samples);
537 sr_dbg("limit_samples = %" PRIu64, devc->limit_samples);
538 samplecount = MIN(devc->max_samples, devc->limit_samples);
539 sr_dbg("Samplecount = %d", samplecount);
541 /* In demux mode the OLS is processing two samples per clock */
542 if (devc->flag_reg & FLAG_DEMUX) {
549 readcount = samplecount / samplespercount;
551 /* Rather read too many samples than too few. */
552 if (samplecount % samplespercount != 0)
555 /* Basic triggers. */
556 if (pols_convert_trigger(sdi) != SR_OK) {
557 sr_err("Failed to configure channels.");
561 if (devc->num_stages > 0) {
562 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
563 devc->trigger_at = (readcount - delaycount) * samplespercount - devc->num_stages;
564 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
565 if (i <= devc->num_stages) {
566 sr_dbg("Setting p-ols stage %d trigger.", i);
567 if ((ret = set_trigger(sdi, i)) != SR_OK)
571 sr_dbg("Disabling p-ols stage %d trigger.", i);
572 if ((ret = disable_trigger(sdi, i)) != SR_OK)
577 /* No triggers configured, force trigger on first stage. */
578 sr_dbg("Forcing trigger at stage 0.");
579 if ((ret = set_trigger(sdi, 0)) != SR_OK)
581 delaycount = readcount;
585 sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
586 devc->cur_samplerate, devc->cur_samplerate_divider);
587 arg[0] = devc->cur_samplerate_divider & 0xff;
588 arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
589 arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
591 if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
594 /* Send extended sample limit and pre/post-trigger capture ratio. */
595 arg[0] = ((readcount - 1) & 0xff);
596 arg[1] = ((readcount - 1) & 0xff00) >> 8;
597 arg[2] = ((readcount - 1) & 0xff0000) >> 16;
598 arg[3] = ((readcount - 1) & 0xff000000) >> 24;
599 if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
601 arg[0] = ((delaycount - 1) & 0xff);
602 arg[1] = ((delaycount - 1) & 0xff00) >> 8;
603 arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
604 arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
605 if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
609 sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
610 devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
611 devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
612 devc->flag_reg & FLAG_RLE ? "on" : "off",
613 devc->flag_reg & FLAG_FILTER ? "on": "off",
614 devc->flag_reg & FLAG_DEMUX ? "on" : "off");
617 * Enable/disable OLS channel groups in the flag register according
618 * to the channel mask. 1 means "disable channel".
620 devc->flag_reg &= ~0x3c;
621 devc->flag_reg |= ~(pols_changrp_mask << 2) & 0x3c;
622 sr_dbg("flag_reg = %x", devc->flag_reg);
625 * In demux mode the OLS is processing two 8-bit or 16-bit samples
626 * in parallel and for this to work the lower two bits of the four
627 * "channel_disable" bits must be replicated to the upper two bits.
629 flag_tmp = devc->flag_reg;
630 if (devc->flag_reg & FLAG_DEMUX) {
632 flag_tmp |= ~(pols_changrp_mask << 4) & 0x30;
634 arg[0] = flag_tmp & 0xff;
635 arg[1] = flag_tmp >> 8;
636 arg[2] = arg[3] = 0x00;
637 if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
640 /* Start acquisition on the device. */
641 if (write_shortcommand(devc, CMD_RUN) != SR_OK)
644 /* Reset all operational states. */
645 devc->rle_count = devc->num_transfers = 0;
646 devc->num_samples = devc->num_bytes = 0;
647 devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
648 memset(devc->sample, 0, 4);
650 std_session_send_df_header(sdi);
652 /* Hook up a dummy handler to receive data from the device. */
653 sr_session_source_add(sdi->session, -1, 0, 10, p_ols_receive_data,
654 (struct sr_dev_inst *)sdi);
659 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
661 struct dev_context *devc;
665 write_shortcommand(devc, CMD_RESET);
666 write_shortcommand(devc, CMD_RESET);
667 write_shortcommand(devc, CMD_RESET);
668 write_shortcommand(devc, CMD_RESET);
669 write_shortcommand(devc, CMD_RESET);
671 sr_session_source_remove(sdi->session, -1);
673 std_session_send_df_end(sdi);
678 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
680 .longname = "Pipistrello OLS",
683 .cleanup = std_cleanup,
685 .dev_list = std_dev_list,
686 .dev_clear = dev_clear,
687 .config_get = config_get,
688 .config_set = config_set,
689 .config_list = config_list,
690 .dev_open = dev_open,
691 .dev_close = dev_close,
692 .dev_acquisition_start = dev_acquisition_start,
693 .dev_acquisition_stop = dev_acquisition_stop,
696 SR_REGISTER_DEV_DRIVER(p_ols_driver_info);