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/>.
21 #include <libserialport.h>
23 extern SR_PRIV struct sr_dev_driver ols_driver_info;
24 static struct sr_dev_driver *di = &ols_driver_info;
26 SR_PRIV int send_shortcommand(struct sr_serial_dev_inst *serial,
31 sr_dbg("Sending cmd 0x%.2x.", command);
33 if (serial_write_blocking(serial, buf, 1, serial_timeout(serial, 1)) != 1)
36 if (serial_drain(serial) != 0)
42 SR_PRIV int send_longcommand(struct sr_serial_dev_inst *serial,
43 uint8_t command, uint8_t *data)
47 sr_dbg("Sending cmd 0x%.2x data 0x%.2x%.2x%.2x%.2x.", command,
48 data[0], data[1], data[2], data[3]);
54 if (serial_write_blocking(serial, buf, 5, serial_timeout(serial, 1)) != 5)
57 if (serial_drain(serial) != 0)
63 /* Configures the channel mask based on which channels are enabled. */
64 SR_PRIV void ols_channel_mask(const struct sr_dev_inst *sdi)
66 struct dev_context *devc;
67 struct sr_channel *channel;
72 devc->channel_mask = 0;
73 for (l = sdi->channels; l; l = l->next) {
76 devc->channel_mask |= 1 << channel->index;
80 SR_PRIV int ols_convert_trigger(const struct sr_dev_inst *sdi)
82 struct dev_context *devc;
83 struct sr_trigger *trigger;
84 struct sr_trigger_stage *stage;
85 struct sr_trigger_match *match;
92 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
93 devc->trigger_mask[i] = 0;
94 devc->trigger_value[i] = 0;
97 if (!(trigger = sr_session_trigger_get(sdi->session)))
100 devc->num_stages = g_slist_length(trigger->stages);
101 if (devc->num_stages > NUM_TRIGGER_STAGES) {
102 sr_err("This device only supports %d trigger stages.",
107 for (l = trigger->stages; l; l = l->next) {
109 for (m = stage->matches; m; m = m->next) {
111 if (!match->channel->enabled)
112 /* Ignore disabled channels with a trigger. */
114 devc->trigger_mask[stage->stage] |= 1 << match->channel->index;
115 if (match->match == SR_TRIGGER_ONE)
116 devc->trigger_value[stage->stage] |= 1 << match->channel->index;
123 SR_PRIV struct dev_context *ols_dev_new(void)
125 struct dev_context *devc;
127 if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
128 sr_err("Device context malloc failed.");
132 /* Device-specific settings */
133 devc->max_samples = devc->max_samplerate = devc->protocol_version = 0;
135 /* Acquisition settings */
136 devc->limit_samples = devc->capture_ratio = 0;
137 devc->trigger_at = -1;
138 devc->channel_mask = 0xffffffff;
144 SR_PRIV struct sr_dev_inst *get_metadata(struct sr_serial_dev_inst *serial)
146 struct sr_dev_inst *sdi;
147 struct dev_context *devc;
148 struct sr_channel *ch;
149 uint32_t tmp_int, ui;
150 uint8_t key, type, token;
152 GString *tmp_str, *devname, *version;
155 sdi = sr_dev_inst_new(SR_ST_INACTIVE, NULL, NULL, NULL);
157 devc = ols_dev_new();
160 devname = g_string_new("");
161 version = g_string_new("");
165 delay_ms = serial_timeout(serial, 1);
166 if (serial_read_blocking(serial, &key, 1, delay_ms) != 1)
169 sr_dbg("Got metadata key 0x00, metadata ends.");
176 /* NULL-terminated string */
177 tmp_str = g_string_new("");
178 delay_ms = serial_timeout(serial, 1);
179 while (serial_read_blocking(serial, &tmp_c, 1, delay_ms) == 1 && tmp_c != '\0')
180 g_string_append_c(tmp_str, tmp_c);
181 sr_dbg("Got metadata key 0x%.2x value '%s'.",
186 devname = g_string_append(devname, tmp_str->str);
189 /* FPGA firmware version */
191 g_string_append(version, ", ");
192 g_string_append(version, "FPGA version ");
193 g_string_append(version, tmp_str->str);
196 /* Ancillary version */
198 g_string_append(version, ", ");
199 g_string_append(version, "Ancillary version ");
200 g_string_append(version, tmp_str->str);
203 sr_info("ols: unknown token 0x%.2x: '%s'",
204 token, tmp_str->str);
207 g_string_free(tmp_str, TRUE);
210 /* 32-bit unsigned integer */
211 delay_ms = serial_timeout(serial, 4);
212 if (serial_read_blocking(serial, &tmp_int, 4, delay_ms) != 4)
214 tmp_int = RB32(&tmp_int);
215 sr_dbg("Got metadata key 0x%.2x value 0x%.8x.",
219 /* Number of usable channels */
220 for (ui = 0; ui < tmp_int; ui++) {
221 if (!(ch = sr_channel_new(ui, SR_CHANNEL_LOGIC, TRUE,
222 ols_channel_names[ui])))
224 sdi->channels = g_slist_append(sdi->channels, ch);
228 /* Amount of sample memory available (bytes) */
229 devc->max_samples = tmp_int;
232 /* Amount of dynamic memory available (bytes) */
233 /* what is this for? */
236 /* Maximum sample rate (hz) */
237 devc->max_samplerate = tmp_int;
240 /* protocol version */
241 devc->protocol_version = tmp_int;
244 sr_info("Unknown token 0x%.2x: 0x%.8x.",
250 /* 8-bit unsigned integer */
251 delay_ms = serial_timeout(serial, 1);
252 if (serial_read_blocking(serial, &tmp_c, 1, delay_ms) != 1)
254 sr_dbg("Got metadata key 0x%.2x value 0x%.2x.",
258 /* Number of usable channels */
259 for (ui = 0; ui < tmp_c; ui++) {
260 if (!(ch = sr_channel_new(ui, SR_CHANNEL_LOGIC, TRUE,
261 ols_channel_names[ui])))
263 sdi->channels = g_slist_append(sdi->channels, ch);
267 /* protocol version */
268 devc->protocol_version = tmp_c;
271 sr_info("Unknown token 0x%.2x: 0x%.2x.",
282 sdi->model = devname->str;
283 sdi->version = version->str;
284 g_string_free(devname, FALSE);
285 g_string_free(version, FALSE);
290 SR_PRIV int ols_set_samplerate(const struct sr_dev_inst *sdi,
291 const uint64_t samplerate)
293 struct dev_context *devc;
296 if (devc->max_samplerate && samplerate > devc->max_samplerate)
297 return SR_ERR_SAMPLERATE;
299 if (samplerate > CLOCK_RATE) {
300 sr_info("Enabling demux mode.");
301 devc->flag_reg |= FLAG_DEMUX;
302 devc->flag_reg &= ~FLAG_FILTER;
303 devc->max_channels = NUM_CHANNELS / 2;
304 devc->cur_samplerate_divider = (CLOCK_RATE * 2 / samplerate) - 1;
306 sr_info("Disabling demux mode.");
307 devc->flag_reg &= ~FLAG_DEMUX;
308 devc->flag_reg |= FLAG_FILTER;
309 devc->max_channels = NUM_CHANNELS;
310 devc->cur_samplerate_divider = (CLOCK_RATE / samplerate) - 1;
313 /* Calculate actual samplerate used and complain if it is different
314 * from the requested.
316 devc->cur_samplerate = CLOCK_RATE / (devc->cur_samplerate_divider + 1);
317 if (devc->flag_reg & FLAG_DEMUX)
318 devc->cur_samplerate *= 2;
319 if (devc->cur_samplerate != samplerate)
320 sr_info("Can't match samplerate %" PRIu64 ", using %"
321 PRIu64 ".", samplerate, devc->cur_samplerate);
326 SR_PRIV void abort_acquisition(const struct sr_dev_inst *sdi)
328 struct sr_datafeed_packet packet;
329 struct sr_serial_dev_inst *serial;
332 serial_source_remove(sdi->session, serial);
334 /* Terminate session */
335 packet.type = SR_DF_END;
336 sr_session_send(sdi, &packet);
339 SR_PRIV int ols_receive_data(int fd, int revents, void *cb_data)
341 struct dev_context *devc;
342 struct sr_dev_inst *sdi;
343 struct sr_serial_dev_inst *serial;
344 struct sr_datafeed_packet packet;
345 struct sr_datafeed_logic logic;
347 int num_ols_changrp, offset, j;
357 if (devc->num_transfers++ == 0) {
359 * First time round, means the device started sending data,
360 * and will not stop until done. If it stops sending for
361 * longer than it takes to send a byte, that means it's
362 * finished. We'll double that to 30ms to be sure...
364 serial_source_remove(sdi->session, serial);
365 serial_source_add(sdi->session, serial, G_IO_IN, 30,
366 ols_receive_data, cb_data);
367 devc->raw_sample_buf = g_try_malloc(devc->limit_samples * 4);
368 if (!devc->raw_sample_buf) {
369 sr_err("Sample buffer malloc failed.");
372 /* fill with 1010... for debugging */
373 memset(devc->raw_sample_buf, 0x82, devc->limit_samples * 4);
377 for (i = NUM_CHANNELS; i > 0x02; i /= 2) {
378 if ((devc->flag_reg & i) == 0) {
383 if (revents == G_IO_IN && devc->num_samples < devc->limit_samples) {
384 if (serial_read_nonblocking(serial, &byte, 1) != 1)
388 /* Ignore it if we've read enough. */
389 if (devc->num_samples >= devc->limit_samples)
392 devc->sample[devc->num_bytes++] = byte;
393 sr_spew("Received byte 0x%.2x.", byte);
394 if (devc->num_bytes == num_ols_changrp) {
396 devc->cnt_samples_rle++;
398 * Got a full sample. Convert from the OLS's little-endian
399 * sample to the local format.
401 sample = devc->sample[0] | (devc->sample[1] << 8) \
402 | (devc->sample[2] << 16) | (devc->sample[3] << 24);
403 sr_dbg("Received sample 0x%.*x.", devc->num_bytes * 2, sample);
404 if (devc->flag_reg & FLAG_RLE) {
406 * In RLE mode the high bit of the sample is the
407 * "count" flag, meaning this sample is the number
408 * of times the previous sample occurred.
410 if (devc->sample[devc->num_bytes - 1] & 0x80) {
411 /* Clear the high bit. */
412 sample &= ~(0x80 << (devc->num_bytes - 1) * 8);
413 devc->rle_count = sample;
414 devc->cnt_samples_rle += devc->rle_count;
415 sr_dbg("RLE count: %u.", devc->rle_count);
420 devc->num_samples += devc->rle_count + 1;
421 if (devc->num_samples > devc->limit_samples) {
422 /* Save us from overrunning the buffer. */
423 devc->rle_count -= devc->num_samples - devc->limit_samples;
424 devc->num_samples = devc->limit_samples;
427 if (num_ols_changrp < 4) {
429 * Some channel groups may have been turned
430 * off, to speed up transfer between the
431 * hardware and the PC. Expand that here before
432 * submitting it over the session bus --
433 * whatever is listening on the bus will be
434 * expecting a full 32-bit sample, based on
435 * the number of channels.
438 memset(devc->tmp_sample, 0, 4);
439 for (i = 0; i < 4; i++) {
440 if (((devc->flag_reg >> 2) & (1 << i)) == 0) {
442 * This channel group was
443 * enabled, copy from received
446 devc->tmp_sample[i] = devc->sample[j++];
447 } else if (devc->flag_reg & FLAG_DEMUX && (i > 2)) {
448 /* group 2 & 3 get added to 0 & 1 */
449 devc->tmp_sample[i - 2] = devc->sample[j++];
452 memcpy(devc->sample, devc->tmp_sample, 4);
453 sr_spew("Expanded sample: 0x%.8x.", sample);
457 * the OLS sends its sample buffer backwards.
458 * store it in reverse order here, so we can dump
459 * this on the session bus later.
461 offset = (devc->limit_samples - devc->num_samples) * 4;
462 for (i = 0; i <= devc->rle_count; i++) {
463 memcpy(devc->raw_sample_buf + offset + (i * 4),
466 memset(devc->sample, 0, 4);
472 * This is the main loop telling us a timeout was reached, or
473 * we've acquired all the samples we asked for -- we're done.
474 * Send the (properly-ordered) buffer to the frontend.
476 sr_dbg("Received %d bytes, %d samples, %d decompressed samples.",
477 devc->cnt_bytes, devc->cnt_samples,
478 devc->cnt_samples_rle);
479 if (devc->trigger_at != -1) {
481 * A trigger was set up, so we need to tell the frontend
484 if (devc->trigger_at > 0) {
485 /* There are pre-trigger samples, send those first. */
486 packet.type = SR_DF_LOGIC;
487 packet.payload = &logic;
488 logic.length = devc->trigger_at * 4;
490 logic.data = devc->raw_sample_buf +
491 (devc->limit_samples - devc->num_samples) * 4;
492 sr_session_send(cb_data, &packet);
495 /* Send the trigger. */
496 packet.type = SR_DF_TRIGGER;
497 sr_session_send(cb_data, &packet);
499 /* Send post-trigger samples. */
500 packet.type = SR_DF_LOGIC;
501 packet.payload = &logic;
502 logic.length = (devc->num_samples * 4) - (devc->trigger_at * 4);
504 logic.data = devc->raw_sample_buf + devc->trigger_at * 4 +
505 (devc->limit_samples - devc->num_samples) * 4;
506 sr_session_send(cb_data, &packet);
508 /* no trigger was used */
509 packet.type = SR_DF_LOGIC;
510 packet.payload = &logic;
511 logic.length = devc->num_samples * 4;
513 logic.data = devc->raw_sample_buf +
514 (devc->limit_samples - devc->num_samples) * 4;
515 sr_session_send(cb_data, &packet);
517 g_free(devc->raw_sample_buf);
519 serial_flush(serial);
520 abort_acquisition(sdi);