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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include <stdio.h> | |
21 | #include <stdint.h> | |
22 | #include <stdlib.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
27 | #include <string.h> | |
28 | #include <sys/time.h> | |
29 | #include <inttypes.h> | |
30 | #include <glib.h> | |
31 | #include <libusb.h> | |
32 | #include "libsigrok.h" | |
33 | #include "libsigrok-internal.h" | |
34 | #include "config.h" | |
35 | #include "dso.h" | |
36 | ||
37 | ||
38 | /* Max time in ms before we want to check on USB events */ | |
39 | /* TODO tune this properly */ | |
40 | #define TICK 1 | |
41 | ||
42 | static const int hwcaps[] = { | |
43 | SR_HWCAP_OSCILLOSCOPE, | |
44 | SR_HWCAP_LIMIT_SAMPLES, | |
45 | SR_HWCAP_CONTINUOUS, | |
46 | SR_HWCAP_TIMEBASE, | |
47 | SR_HWCAP_BUFFERSIZE, | |
48 | SR_HWCAP_TRIGGER_SOURCE, | |
49 | SR_HWCAP_TRIGGER_SLOPE, | |
50 | SR_HWCAP_HORIZ_TRIGGERPOS, | |
51 | SR_HWCAP_FILTER, | |
52 | SR_HWCAP_VDIV, | |
53 | SR_HWCAP_COUPLING, | |
54 | 0, | |
55 | }; | |
56 | ||
57 | static const char *probe_names[] = { | |
58 | "CH1", | |
59 | "CH2", | |
60 | NULL, | |
61 | }; | |
62 | ||
63 | static const struct dso_profile dev_profiles[] = { | |
64 | { 0x04b4, 0x2090, 0x04b5, 0x2090, | |
65 | "Hantek", "DSO-2090", | |
66 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
67 | { 0x04b4, 0x2150, 0x04b5, 0x2150, | |
68 | "Hantek", "DSO-2150", | |
69 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
70 | { 0x04b4, 0x2250, 0x04b5, 0x2250, | |
71 | "Hantek", "DSO-2250", | |
72 | FIRMWARE_DIR "/hantek-dso-2xxx.fw" }, | |
73 | { 0x04b4, 0x5200, 0x04b5, 0x5200, | |
74 | "Hantek", "DSO-5200", | |
75 | FIRMWARE_DIR "/hantek-dso-5xxx.fw" }, | |
76 | { 0x04b4, 0x520a, 0x04b5, 0x520a, | |
77 | "Hantek", "DSO-5200A", | |
78 | FIRMWARE_DIR "/hantek-dso-5xxx.fw" }, | |
79 | { 0, 0, 0, 0, 0, 0, 0 }, | |
80 | }; | |
81 | ||
82 | static const uint64_t buffersizes[] = { | |
83 | 10240, | |
84 | 32768, | |
85 | /* TODO: 65535 */ | |
86 | 0, | |
87 | }; | |
88 | ||
89 | static const struct sr_rational timebases[] = { | |
90 | /* microseconds */ | |
91 | { 10, 1000000 }, | |
92 | { 20, 1000000 }, | |
93 | { 40, 1000000 }, | |
94 | { 100, 1000000 }, | |
95 | { 200, 1000000 }, | |
96 | { 400, 1000000 }, | |
97 | /* milliseconds */ | |
98 | { 1, 1000 }, | |
99 | { 2, 1000 }, | |
100 | { 4, 1000 }, | |
101 | { 10, 1000 }, | |
102 | { 20, 1000 }, | |
103 | { 40, 1000 }, | |
104 | { 100, 1000 }, | |
105 | { 200, 1000 }, | |
106 | { 400, 1000 }, | |
107 | { 0, 0}, | |
108 | }; | |
109 | ||
110 | static const struct sr_rational vdivs[] = { | |
111 | /* millivolts */ | |
112 | { 10, 1000 }, | |
113 | { 20, 1000 }, | |
114 | { 50, 1000 }, | |
115 | { 100, 1000 }, | |
116 | { 200, 1000 }, | |
117 | { 500, 1000 }, | |
118 | /* volts */ | |
119 | { 1, 1 }, | |
120 | { 2, 1 }, | |
121 | { 5, 1 }, | |
122 | { 0, 0 }, | |
123 | }; | |
124 | ||
125 | static const char *trigger_sources[] = { | |
126 | "CH1", | |
127 | "CH2", | |
128 | "EXT", | |
129 | /* TODO: forced */ | |
130 | NULL, | |
131 | }; | |
132 | ||
133 | static const char *filter_targets[] = { | |
134 | "CH1", | |
135 | "CH2", | |
136 | /* TODO: "TRIGGER", */ | |
137 | NULL, | |
138 | }; | |
139 | ||
140 | static const char *coupling[] = { | |
141 | "AC", | |
142 | "DC", | |
143 | "GND", | |
144 | NULL, | |
145 | }; | |
146 | ||
147 | SR_PRIV libusb_context *usb_context = NULL; | |
148 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info; | |
149 | static struct sr_dev_driver *hdi = &hantek_dso_driver_info; | |
150 | ||
151 | static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof) | |
152 | { | |
153 | struct sr_dev_inst *sdi; | |
154 | struct context *ctx; | |
155 | ||
156 | sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING, | |
157 | prof->vendor, prof->model, NULL); | |
158 | if (!sdi) | |
159 | return NULL; | |
160 | sdi->driver = hdi; | |
161 | ||
162 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
163 | sr_err("hantek-dso: ctx malloc failed"); | |
164 | return NULL; | |
165 | } | |
166 | ctx->profile = prof; | |
167 | ctx->dev_state = IDLE; | |
168 | ctx->timebase = DEFAULT_TIMEBASE; | |
169 | ctx->ch1_enabled = TRUE; | |
170 | ctx->ch2_enabled = TRUE; | |
171 | ctx->voltage_ch1 = DEFAULT_VOLTAGE; | |
172 | ctx->voltage_ch2 = DEFAULT_VOLTAGE; | |
173 | ctx->coupling_ch1 = DEFAULT_COUPLING; | |
174 | ctx->coupling_ch2 = DEFAULT_COUPLING; | |
175 | ctx->voffset_ch1 = DEFAULT_VERT_OFFSET; | |
176 | ctx->voffset_ch2 = DEFAULT_VERT_OFFSET; | |
177 | ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS; | |
178 | ctx->framesize = DEFAULT_FRAMESIZE; | |
179 | ctx->triggerslope = SLOPE_POSITIVE; | |
180 | ctx->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE); | |
181 | ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS; | |
182 | sdi->priv = ctx; | |
183 | hdi->instances = g_slist_append(hdi->instances, sdi); | |
184 | ||
185 | return sdi; | |
186 | } | |
187 | ||
188 | static int configure_probes(struct context *ctx, const GSList *probes) | |
189 | { | |
190 | const struct sr_probe *probe; | |
191 | const GSList *l; | |
192 | ||
193 | ctx->ch1_enabled = ctx->ch2_enabled = FALSE; | |
194 | for (l = probes; l; l = l->next) { | |
195 | probe = (struct sr_probe *)l->data; | |
196 | if (probe->index == 1) | |
197 | ctx->ch1_enabled = probe->enabled; | |
198 | else if (probe->index == 2) | |
199 | ctx->ch2_enabled = probe->enabled; | |
200 | } | |
201 | ||
202 | return SR_OK; | |
203 | } | |
204 | ||
205 | /* Properly close and free all devices. */ | |
206 | static void clear_instances(void) | |
207 | { | |
208 | struct sr_dev_inst *sdi; | |
209 | struct context *ctx; | |
210 | GSList *l; | |
211 | ||
212 | for (l = hdi->instances; l; l = l->next) { | |
213 | if (!(sdi = l->data)) { | |
214 | /* Log error, but continue cleaning up the rest. */ | |
215 | sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__); | |
216 | continue; | |
217 | } | |
218 | if (!(ctx = sdi->priv)) { | |
219 | /* Log error, but continue cleaning up the rest. */ | |
220 | sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__); | |
221 | continue; | |
222 | } | |
223 | dso_close(sdi); | |
224 | sr_usb_dev_inst_free(ctx->usb); | |
225 | g_free(ctx->triggersource); | |
226 | ||
227 | sr_dev_inst_free(sdi); | |
228 | } | |
229 | ||
230 | g_slist_free(hdi->instances); | |
231 | hdi->instances = NULL; | |
232 | ||
233 | } | |
234 | ||
235 | static int hw_init(void) | |
236 | { | |
237 | ||
238 | if (libusb_init(&usb_context) != 0) { | |
239 | sr_err("hantek-dso: Failed to initialize USB."); | |
240 | return SR_ERR; | |
241 | } | |
242 | ||
243 | return SR_OK; | |
244 | } | |
245 | ||
246 | static GSList *hw_scan(GSList *options) | |
247 | { | |
248 | struct sr_dev_inst *sdi; | |
249 | const struct dso_profile *prof; | |
250 | struct context *ctx; | |
251 | GSList *devices; | |
252 | struct libusb_device_descriptor des; | |
253 | libusb_device **devlist; | |
254 | int devcnt, ret, i, j; | |
255 | ||
256 | (void)options; | |
257 | devcnt = 0; | |
258 | devices = 0; | |
259 | hdi->instances = NULL; | |
260 | ||
261 | clear_instances(); | |
262 | ||
263 | /* Find all Hantek DSO devices and upload firmware to all of them. */ | |
264 | libusb_get_device_list(usb_context, &devlist); | |
265 | for (i = 0; devlist[i]; i++) { | |
266 | if ((ret = libusb_get_device_descriptor(devlist[i], &des))) { | |
267 | sr_err("hantek-dso: failed to get device descriptor: %d", ret); | |
268 | continue; | |
269 | } | |
270 | ||
271 | prof = NULL; | |
272 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
273 | if (des.idVendor == dev_profiles[j].orig_vid | |
274 | && des.idProduct == dev_profiles[j].orig_pid) { | |
275 | /* Device matches the pre-firmware profile. */ | |
276 | prof = &dev_profiles[j]; | |
277 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
278 | sdi = dso_dev_new(devcnt, prof); | |
279 | devices = g_slist_append(devices, sdi); | |
280 | ctx = sdi->priv; | |
281 | if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, | |
282 | prof->firmware) == SR_OK) | |
283 | /* Remember when the firmware on this device was updated */ | |
284 | ctx->fw_updated = g_get_monotonic_time(); | |
285 | else | |
286 | sr_err("hantek-dso: firmware upload failed for " | |
287 | "device %d", devcnt); | |
288 | /* Dummy USB address of 0xff will get overwritten later. */ | |
289 | ctx->usb = sr_usb_dev_inst_new( | |
290 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
291 | devcnt++; | |
292 | break; | |
293 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
294 | && des.idProduct == dev_profiles[j].fw_pid) { | |
295 | /* Device matches the post-firmware profile. */ | |
296 | prof = &dev_profiles[j]; | |
297 | sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model); | |
298 | sdi = dso_dev_new(devcnt, prof); | |
299 | sdi->status = SR_ST_INACTIVE; | |
300 | devices = g_slist_append(devices, sdi); | |
301 | ctx = sdi->priv; | |
302 | ctx->usb = sr_usb_dev_inst_new( | |
303 | libusb_get_bus_number(devlist[i]), | |
304 | libusb_get_device_address(devlist[i]), NULL); | |
305 | devcnt++; | |
306 | break; | |
307 | } | |
308 | } | |
309 | if (!prof) | |
310 | /* not a supported VID/PID */ | |
311 | continue; | |
312 | } | |
313 | libusb_free_device_list(devlist, 1); | |
314 | ||
315 | return devices; | |
316 | } | |
317 | ||
318 | static int hw_dev_open(struct sr_dev_inst *sdi) | |
319 | { | |
320 | struct context *ctx; | |
321 | int64_t timediff_us, timediff_ms; | |
322 | int err; | |
323 | ||
324 | ctx = sdi->priv; | |
325 | ||
326 | /* | |
327 | * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
328 | * for the FX2 to renumerate | |
329 | */ | |
330 | err = SR_ERR; | |
331 | if (ctx->fw_updated > 0) { | |
332 | sr_info("hantek-dso: waiting for device to reset"); | |
333 | /* takes at least 300ms for the FX2 to be gone from the USB bus */ | |
334 | g_usleep(300 * 1000); | |
335 | timediff_ms = 0; | |
336 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
337 | if ((err = dso_open(sdi)) == SR_OK) | |
338 | break; | |
339 | g_usleep(100 * 1000); | |
340 | timediff_us = g_get_monotonic_time() - ctx->fw_updated; | |
341 | timediff_ms = timediff_us / 1000; | |
342 | sr_spew("hantek-dso: waited %" PRIi64 " ms", timediff_ms); | |
343 | } | |
344 | sr_info("hantek-dso: device came back after %d ms", timediff_ms); | |
345 | } else { | |
346 | err = dso_open(sdi); | |
347 | } | |
348 | ||
349 | if (err != SR_OK) { | |
350 | sr_err("hantek-dso: unable to open device"); | |
351 | return SR_ERR; | |
352 | } | |
353 | ||
354 | err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE); | |
355 | if (err != 0) { | |
356 | sr_err("hantek-dso: Unable to claim interface: %d", err); | |
357 | return SR_ERR; | |
358 | } | |
359 | ||
360 | return SR_OK; | |
361 | } | |
362 | ||
363 | static int hw_dev_close(struct sr_dev_inst *sdi) | |
364 | { | |
365 | ||
366 | dso_close(sdi); | |
367 | ||
368 | return SR_OK; | |
369 | } | |
370 | ||
371 | static int hw_cleanup(void) | |
372 | { | |
373 | ||
374 | clear_instances(); | |
375 | ||
376 | if (usb_context) | |
377 | libusb_exit(usb_context); | |
378 | usb_context = NULL; | |
379 | ||
380 | return SR_OK; | |
381 | } | |
382 | ||
383 | static int hw_info_get(int info_id, const void **data, | |
384 | const struct sr_dev_inst *sdi) | |
385 | { | |
386 | uint64_t tmp; | |
387 | ||
388 | switch (info_id) { | |
389 | case SR_DI_INST: | |
390 | *data = sdi; | |
391 | break; | |
392 | case SR_DI_HWCAPS: | |
393 | *data = hwcaps; | |
394 | break; | |
395 | case SR_DI_NUM_PROBES: | |
396 | *data = GINT_TO_POINTER(NUM_PROBES); | |
397 | break; | |
398 | case SR_DI_PROBE_NAMES: | |
399 | *data = probe_names; | |
400 | break; | |
401 | case SR_DI_BUFFERSIZES: | |
402 | *data = buffersizes; | |
403 | break; | |
404 | case SR_DI_TIMEBASES: | |
405 | *data = timebases; | |
406 | break; | |
407 | case SR_DI_TRIGGER_SOURCES: | |
408 | *data = trigger_sources; | |
409 | break; | |
410 | case SR_DI_FILTERS: | |
411 | *data = filter_targets; | |
412 | break; | |
413 | case SR_DI_VDIVS: | |
414 | *data = vdivs; | |
415 | break; | |
416 | case SR_DI_COUPLING: | |
417 | *data = coupling; | |
418 | break; | |
419 | /* TODO remove this */ | |
420 | case SR_DI_CUR_SAMPLERATE: | |
421 | *data = &tmp; | |
422 | break; | |
423 | default: | |
424 | return SR_ERR_ARG; | |
425 | } | |
426 | ||
427 | return SR_OK; | |
428 | } | |
429 | ||
430 | static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap, | |
431 | const void *value) | |
432 | { | |
433 | struct context *ctx; | |
434 | struct sr_rational tmp_rat; | |
435 | float tmp_float; | |
436 | uint64_t tmp_u64; | |
437 | int ret, i; | |
438 | char **targets; | |
439 | ||
440 | if (sdi->status != SR_ST_ACTIVE) | |
441 | return SR_ERR; | |
442 | ||
443 | ret = SR_OK; | |
444 | ctx = sdi->priv; | |
445 | switch (hwcap) { | |
446 | case SR_HWCAP_LIMIT_FRAMES: | |
447 | ctx->limit_frames = *(const uint64_t *)value; | |
448 | break; | |
449 | case SR_HWCAP_PROBECONFIG: | |
450 | ret = configure_probes(ctx, (const GSList *)value); | |
451 | break; | |
452 | case SR_HWCAP_TRIGGER_SLOPE: | |
453 | tmp_u64 = *(const int *)value; | |
454 | if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE) | |
455 | ret = SR_ERR_ARG; | |
456 | ctx->triggerslope = tmp_u64; | |
457 | break; | |
458 | case SR_HWCAP_HORIZ_TRIGGERPOS: | |
459 | tmp_float = *(const float *)value; | |
460 | if (tmp_float < 0.0 || tmp_float > 1.0) { | |
461 | sr_err("hantek-dso: trigger position should be between 0.0 and 1.0"); | |
462 | ret = SR_ERR_ARG; | |
463 | } else | |
464 | ctx->triggerposition = tmp_float; | |
465 | break; | |
466 | case SR_HWCAP_BUFFERSIZE: | |
467 | tmp_u64 = *(const int *)value; | |
468 | for (i = 0; buffersizes[i]; i++) { | |
469 | if (buffersizes[i] == tmp_u64) { | |
470 | ctx->framesize = tmp_u64; | |
471 | break; | |
472 | } | |
473 | } | |
474 | if (buffersizes[i] == 0) | |
475 | ret = SR_ERR_ARG; | |
476 | break; | |
477 | case SR_HWCAP_TIMEBASE: | |
478 | tmp_rat = *(const struct sr_rational *)value; | |
479 | for (i = 0; timebases[i].p && timebases[i].q; i++) { | |
480 | if (timebases[i].p == tmp_rat.p | |
481 | && timebases[i].q == tmp_rat.q) { | |
482 | ctx->timebase = i; | |
483 | break; | |
484 | } | |
485 | } | |
486 | if (timebases[i].p == 0 && timebases[i].q == 0) | |
487 | ret = SR_ERR_ARG; | |
488 | break; | |
489 | case SR_HWCAP_TRIGGER_SOURCE: | |
490 | for (i = 0; trigger_sources[i]; i++) { | |
491 | if (!strcmp(value, trigger_sources[i])) { | |
492 | ctx->triggersource = g_strdup(value); | |
493 | break; | |
494 | } | |
495 | } | |
496 | if (trigger_sources[i] == 0) | |
497 | ret = SR_ERR_ARG; | |
498 | break; | |
499 | case SR_HWCAP_FILTER: | |
500 | ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0; | |
501 | targets = g_strsplit(value, ",", 0); | |
502 | for (i = 0; targets[i]; i++) { | |
503 | if (targets[i] == '\0') | |
504 | /* Empty filter string can be used to clear them all. */ | |
505 | ; | |
506 | else if (!strcmp(targets[i], "CH1")) | |
507 | ctx->filter_ch1 = TRUE; | |
508 | else if (!strcmp(targets[i], "CH2")) | |
509 | ctx->filter_ch2 = TRUE; | |
510 | else if (!strcmp(targets[i], "TRIGGER")) | |
511 | ctx->filter_trigger = TRUE; | |
512 | else { | |
513 | sr_err("invalid filter target %s", targets[i]); | |
514 | ret = SR_ERR_ARG; | |
515 | } | |
516 | } | |
517 | g_strfreev(targets); | |
518 | break; | |
519 | case SR_HWCAP_VDIV: | |
520 | /* TODO not supporting vdiv per channel yet */ | |
521 | tmp_rat = *(const struct sr_rational *)value; | |
522 | for (i = 0; vdivs[i].p && vdivs[i].q; i++) { | |
523 | if (vdivs[i].p == tmp_rat.p | |
524 | && vdivs[i].q == tmp_rat.q) { | |
525 | ctx->voltage_ch1 = i; | |
526 | ctx->voltage_ch2 = i; | |
527 | break; | |
528 | } | |
529 | } | |
530 | if (vdivs[i].p == 0 && vdivs[i].q == 0) | |
531 | ret = SR_ERR_ARG; | |
532 | break; | |
533 | case SR_HWCAP_COUPLING: | |
534 | /* TODO not supporting coupling per channel yet */ | |
535 | for (i = 0; coupling[i]; i++) { | |
536 | if (!strcmp(value, coupling[i])) { | |
537 | ctx->coupling_ch1 = i; | |
538 | ctx->coupling_ch2 = i; | |
539 | break; | |
540 | } | |
541 | } | |
542 | if (coupling[i] == 0) | |
543 | ret = SR_ERR_ARG; | |
544 | break; | |
545 | default: | |
546 | ret = SR_ERR_ARG; | |
547 | } | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | static void send_chunk(struct context *ctx, unsigned char *buf, | |
553 | int num_samples) | |
554 | { | |
555 | struct sr_datafeed_packet packet; | |
556 | struct sr_datafeed_analog analog; | |
557 | float ch1, ch2, range; | |
558 | int num_probes, data_offset, i; | |
559 | ||
560 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; | |
561 | packet.type = SR_DF_ANALOG; | |
562 | packet.payload = &analog; | |
563 | /* TODO: support for 5xxx series 9-bit samples */ | |
564 | analog.num_samples = num_samples; | |
565 | analog.mq = SR_MQ_VOLTAGE; | |
566 | analog.unit = SR_UNIT_VOLT; | |
567 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
568 | data_offset = 0; | |
569 | for (i = 0; i < analog.num_samples; i++) { | |
570 | /* The device always sends data for both channels. If a channel | |
571 | * is disabled, it contains a copy of the enabled channel's | |
572 | * data. However, we only send the requested channels to the bus. | |
573 | * | |
574 | * Voltage values are encoded as a value 0-255 (0-512 on the 5200*), | |
575 | * where the value is a point in the range represented by the vdiv | |
576 | * setting. There are 8 vertical divs, so e.g. 500mV/div represents | |
577 | * 4V peak-to-peak where 0 = -2V and 255 = +2V. | |
578 | */ | |
579 | /* TODO: support for 5xxx series 9-bit samples */ | |
580 | if (ctx->ch1_enabled) { | |
581 | range = ((float)vdivs[ctx->voltage_ch1].p / vdivs[ctx->voltage_ch1].q) * 8; | |
582 | ch1 = range / 255 * *(buf + i * 2 + 1); | |
583 | /* Value is centered around 0V. */ | |
584 | ch1 -= range / 2; | |
585 | analog.data[data_offset++] = ch1; | |
586 | } | |
587 | if (ctx->ch2_enabled) { | |
588 | range = ((float)vdivs[ctx->voltage_ch2].p / vdivs[ctx->voltage_ch2].q) * 8; | |
589 | ch2 = range / 255 * *(buf + i * 2); | |
590 | ch2 -= range / 2; | |
591 | analog.data[data_offset++] = ch2; | |
592 | } | |
593 | } | |
594 | sr_session_send(ctx->cb_data, &packet); | |
595 | ||
596 | } | |
597 | ||
598 | /* Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
599 | * Only channel data comes in asynchronously, and all transfers for this are | |
600 | * queued up beforehand, so this just needs so chuck the incoming data onto | |
601 | * the libsigrok session bus. | |
602 | */ | |
603 | static void receive_transfer(struct libusb_transfer *transfer) | |
604 | { | |
605 | struct sr_datafeed_packet packet; | |
606 | struct context *ctx; | |
607 | int num_samples, pre; | |
608 | ||
609 | ctx = transfer->user_data; | |
610 | sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes", | |
611 | transfer->status, transfer->actual_length); | |
612 | ||
613 | if (transfer->actual_length == 0) | |
614 | /* Nothing to send to the bus. */ | |
615 | return; | |
616 | ||
617 | num_samples = transfer->actual_length / 2; | |
618 | ||
619 | sr_dbg("hantek-dso: got %d-%d/%d samples in frame", ctx->samp_received + 1, | |
620 | ctx->samp_received + num_samples, ctx->framesize); | |
621 | ||
622 | /* The device always sends a full frame, but the beginning of the frame | |
623 | * doesn't represent the trigger point. The offset at which the trigger | |
624 | * happened came in with the capture state, so we need to start sending | |
625 | * from there up the session bus. The samples in the frame buffer before | |
626 | * that trigger point came after the end of the device's frame buffer was | |
627 | * reached, and it wrapped around to overwrite up until the trigger point. | |
628 | */ | |
629 | if (ctx->samp_received < ctx->trigger_offset) { | |
630 | /* Trigger point not yet reached. */ | |
631 | if (ctx->samp_received + num_samples < ctx->trigger_offset) { | |
632 | /* The entire chunk is before the trigger point. */ | |
633 | memcpy(ctx->framebuf + ctx->samp_buffered * 2, | |
634 | transfer->buffer, num_samples * 2); | |
635 | ctx->samp_buffered += num_samples; | |
636 | } else { | |
637 | /* This chunk hits or overruns the trigger point. | |
638 | * Store the part before the trigger fired, and | |
639 | * send the rest up to the session bus. */ | |
640 | pre = ctx->trigger_offset - ctx->samp_received; | |
641 | memcpy(ctx->framebuf + ctx->samp_buffered * 2, | |
642 | transfer->buffer, pre * 2); | |
643 | ctx->samp_buffered += pre; | |
644 | ||
645 | /* The rest of this chunk starts with the trigger point. */ | |
646 | sr_dbg("hantek-dso: reached trigger point, %d samples buffered", | |
647 | ctx->samp_buffered); | |
648 | ||
649 | /* Avoid the corner case where the chunk ended at | |
650 | * exactly the trigger point. */ | |
651 | if (num_samples > pre) | |
652 | send_chunk(ctx, transfer->buffer + pre * 2, | |
653 | num_samples - pre); | |
654 | } | |
655 | } else { | |
656 | /* Already past the trigger point, just send it all out. */ | |
657 | send_chunk(ctx, transfer->buffer, | |
658 | num_samples); | |
659 | } | |
660 | ||
661 | ctx->samp_received += num_samples; | |
662 | ||
663 | /* Everything in this transfer was either copied to the buffer or | |
664 | * sent to the session bus. */ | |
665 | g_free(transfer->buffer); | |
666 | libusb_free_transfer(transfer); | |
667 | ||
668 | if (ctx->samp_received >= ctx->framesize) { | |
669 | /* That was the last chunk in this frame. Send the buffered | |
670 | * pre-trigger samples out now, in one big chunk. */ | |
671 | sr_dbg("hantek-dso: end of frame, sending %d pre-trigger buffered samples", | |
672 | ctx->samp_buffered); | |
673 | send_chunk(ctx, ctx->framebuf, ctx->samp_buffered); | |
674 | ||
675 | /* Mark the end of this frame. */ | |
676 | packet.type = SR_DF_FRAME_END; | |
677 | sr_session_send(ctx->cb_data, &packet); | |
678 | ||
679 | if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) { | |
680 | /* Terminate session */ | |
681 | /* TODO: don't leave pending USB transfers hanging */ | |
682 | packet.type = SR_DF_END; | |
683 | sr_session_send(ctx->cb_data, &packet); | |
684 | } else { | |
685 | ctx->dev_state = NEW_CAPTURE; | |
686 | } | |
687 | } | |
688 | ||
689 | } | |
690 | ||
691 | static int handle_event(int fd, int revents, void *cb_data) | |
692 | { | |
693 | struct sr_datafeed_packet packet; | |
694 | struct timeval tv; | |
695 | struct context *ctx; | |
696 | int num_probes; | |
697 | uint32_t trigger_offset; | |
698 | uint8_t capturestate; | |
699 | ||
700 | /* Avoid compiler warnings. */ | |
701 | (void)fd; | |
702 | (void)revents; | |
703 | ||
704 | /* Always handle pending libusb events. */ | |
705 | tv.tv_sec = tv.tv_usec = 0; | |
706 | libusb_handle_events_timeout(usb_context, &tv); | |
707 | ||
708 | ctx = cb_data; | |
709 | /* TODO: ugh */ | |
710 | if (ctx->dev_state == NEW_CAPTURE) { | |
711 | if (dso_capture_start(ctx) != SR_OK) | |
712 | return TRUE; | |
713 | if (dso_enable_trigger(ctx) != SR_OK) | |
714 | return TRUE; | |
715 | // if (dso_force_trigger(ctx) != SR_OK) | |
716 | // return TRUE; | |
717 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
718 | ctx->dev_state = CAPTURE; | |
719 | return TRUE; | |
720 | } | |
721 | if (ctx->dev_state != CAPTURE) | |
722 | return TRUE; | |
723 | ||
724 | if ((dso_get_capturestate(ctx, &capturestate, &trigger_offset)) != SR_OK) | |
725 | return TRUE; | |
726 | ||
727 | sr_dbg("hantek-dso: capturestate %d", capturestate); | |
728 | sr_dbg("hantek-dso: trigger offset 0x%.6x", trigger_offset); | |
729 | switch (capturestate) { | |
730 | case CAPTURE_EMPTY: | |
731 | if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) { | |
732 | ctx->capture_empty_count = 0; | |
733 | if (dso_capture_start(ctx) != SR_OK) | |
734 | break; | |
735 | if (dso_enable_trigger(ctx) != SR_OK) | |
736 | break; | |
737 | // if (dso_force_trigger(ctx) != SR_OK) | |
738 | // break; | |
739 | sr_dbg("hantek-dso: successfully requested next chunk"); | |
740 | } | |
741 | break; | |
742 | case CAPTURE_FILLING: | |
743 | /* no data yet */ | |
744 | break; | |
745 | case CAPTURE_READY_8BIT: | |
746 | /* Remember where in the captured frame the trigger is. */ | |
747 | ctx->trigger_offset = trigger_offset; | |
748 | ||
749 | num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1; | |
750 | ctx->framebuf = g_try_malloc(ctx->framesize * num_probes * 2); | |
751 | ctx->samp_buffered = ctx->samp_received = 0; | |
752 | ||
753 | /* Tell the scope to send us the first frame. */ | |
754 | if (dso_get_channeldata(ctx, receive_transfer) != SR_OK) | |
755 | break; | |
756 | ||
757 | /* Don't hit the state machine again until we're done fetching | |
758 | * the data we just told the scope to send. | |
759 | */ | |
760 | ctx->dev_state = FETCH_DATA; | |
761 | ||
762 | /* Tell the frontend a new frame is on the way. */ | |
763 | packet.type = SR_DF_FRAME_BEGIN; | |
764 | sr_session_send(cb_data, &packet); | |
765 | break; | |
766 | case CAPTURE_READY_9BIT: | |
767 | /* TODO */ | |
768 | sr_err("not yet supported"); | |
769 | break; | |
770 | case CAPTURE_TIMEOUT: | |
771 | /* Doesn't matter, we'll try again next time. */ | |
772 | break; | |
773 | default: | |
774 | sr_dbg("unknown capture state"); | |
775 | } | |
776 | ||
777 | return TRUE; | |
778 | } | |
779 | ||
780 | static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, | |
781 | void *cb_data) | |
782 | { | |
783 | const struct libusb_pollfd **lupfd; | |
784 | struct sr_datafeed_packet packet; | |
785 | struct sr_datafeed_header header; | |
786 | struct sr_datafeed_meta_analog meta; | |
787 | struct context *ctx; | |
788 | int i; | |
789 | ||
790 | if (sdi->status != SR_ST_ACTIVE) | |
791 | return SR_ERR; | |
792 | ||
793 | ctx = sdi->priv; | |
794 | ctx->cb_data = cb_data; | |
795 | ||
796 | if (dso_init(ctx) != SR_OK) | |
797 | return SR_ERR; | |
798 | ||
799 | if (dso_capture_start(ctx) != SR_OK) | |
800 | return SR_ERR; | |
801 | ||
802 | ctx->dev_state = CAPTURE; | |
803 | lupfd = libusb_get_pollfds(usb_context); | |
804 | for (i = 0; lupfd[i]; i++) | |
805 | sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event, | |
806 | ctx); | |
807 | free(lupfd); | |
808 | ||
809 | /* Send header packet to the session bus. */ | |
810 | packet.type = SR_DF_HEADER; | |
811 | packet.payload = (unsigned char *)&header; | |
812 | header.feed_version = 1; | |
813 | gettimeofday(&header.starttime, NULL); | |
814 | sr_session_send(cb_data, &packet); | |
815 | ||
816 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
817 | packet.type = SR_DF_META_ANALOG; | |
818 | packet.payload = &meta; | |
819 | meta.num_probes = NUM_PROBES; | |
820 | sr_session_send(cb_data, &packet); | |
821 | ||
822 | return SR_OK; | |
823 | } | |
824 | ||
825 | /* TODO: doesn't really cancel pending transfers so they might come in after | |
826 | * SR_DF_END is sent. | |
827 | */ | |
828 | static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi, | |
829 | void *cb_data) | |
830 | { | |
831 | struct sr_datafeed_packet packet; | |
832 | struct context *ctx; | |
833 | ||
834 | if (sdi->status != SR_ST_ACTIVE) | |
835 | return SR_ERR; | |
836 | ||
837 | ctx = sdi->priv; | |
838 | ctx->dev_state = IDLE; | |
839 | ||
840 | packet.type = SR_DF_END; | |
841 | sr_session_send(cb_data, &packet); | |
842 | ||
843 | return SR_OK; | |
844 | } | |
845 | ||
846 | SR_PRIV struct sr_dev_driver hantek_dso_driver_info = { | |
847 | .name = "hantek-dso", | |
848 | .longname = "Hantek DSO", | |
849 | .api_version = 1, | |
850 | .init = hw_init, | |
851 | .cleanup = hw_cleanup, | |
852 | .scan = hw_scan, | |
853 | .dev_open = hw_dev_open, | |
854 | .dev_close = hw_dev_close, | |
855 | .info_get = hw_info_get, | |
856 | .dev_config_set = hw_dev_config_set, | |
857 | .dev_acquisition_start = hw_dev_acquisition_start, | |
858 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
859 | .instances = NULL, | |
860 | }; |