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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2015 Christer Ekholm <christerekholm@gmail.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 <config.h> | |
21 | #include "protocol.h" | |
22 | ||
23 | /* Max time in ms before we want to check on USB events */ | |
24 | #define TICK 200 | |
25 | ||
26 | #define RANGE(ch) (((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * VDIV_MULTIPLIER) | |
27 | ||
28 | static const uint32_t scanopts[] = { | |
29 | SR_CONF_CONN, | |
30 | }; | |
31 | ||
32 | static const uint32_t drvopts[] = { | |
33 | SR_CONF_OSCILLOSCOPE, | |
34 | }; | |
35 | ||
36 | static const uint32_t devopts[] = { | |
37 | SR_CONF_CONN | SR_CONF_GET, | |
38 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
39 | SR_CONF_NUM_VDIV | SR_CONF_GET, | |
40 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
41 | SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, | |
42 | }; | |
43 | ||
44 | static const uint32_t devopts_cg[] = { | |
45 | SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
46 | SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
47 | }; | |
48 | ||
49 | static const char *channel_names[] = { | |
50 | "CH1", "CH2", | |
51 | }; | |
52 | ||
53 | static const char *coupling[] = { | |
54 | "AC", "DC", | |
55 | }; | |
56 | ||
57 | static const struct hantek_6xxx_profile dev_profiles[] = { | |
58 | { | |
59 | 0x04b4, 0x6022, 0x04b5, 0x6022, | |
60 | "Hantek", "6022BE", "hantek-6022be.fw", | |
61 | }, | |
62 | { | |
63 | 0x8102, 0x8102, 0x1D50, 0x608E, | |
64 | "Sainsmart", "DDS120", "sainsmart-dds120.fw", | |
65 | }, | |
66 | ALL_ZERO | |
67 | }; | |
68 | ||
69 | static const uint64_t samplerates[] = { | |
70 | SAMPLERATE_VALUES | |
71 | }; | |
72 | ||
73 | static const uint64_t vdivs[][2] = { | |
74 | VDIV_VALUES | |
75 | }; | |
76 | ||
77 | SR_PRIV struct sr_dev_driver hantek_6xxx_driver_info; | |
78 | ||
79 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount); | |
80 | ||
81 | static int dev_acquisition_stop(struct sr_dev_inst *sdi); | |
82 | ||
83 | static struct sr_dev_inst *hantek_6xxx_dev_new(const struct hantek_6xxx_profile *prof) | |
84 | { | |
85 | struct sr_dev_inst *sdi; | |
86 | struct sr_channel *ch; | |
87 | struct sr_channel_group *cg; | |
88 | struct drv_context *drvc; | |
89 | struct dev_context *devc; | |
90 | unsigned int i; | |
91 | ||
92 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
93 | sdi->status = SR_ST_INITIALIZING; | |
94 | sdi->vendor = g_strdup(prof->vendor); | |
95 | sdi->model = g_strdup(prof->model); | |
96 | sdi->driver = &hantek_6xxx_driver_info; | |
97 | ||
98 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) { | |
99 | ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]); | |
100 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
101 | cg->name = g_strdup(channel_names[i]); | |
102 | cg->channels = g_slist_append(cg->channels, ch); | |
103 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
104 | } | |
105 | ||
106 | devc = g_malloc0(sizeof(struct dev_context)); | |
107 | ||
108 | for (i = 0; i < NUM_CHANNELS; i++) { | |
109 | devc->ch_enabled[i] = TRUE; | |
110 | devc->voltage[i] = DEFAULT_VOLTAGE; | |
111 | devc->coupling[i] = DEFAULT_COUPLING; | |
112 | } | |
113 | ||
114 | devc->sample_buf = NULL; | |
115 | devc->sample_buf_write = 0; | |
116 | devc->sample_buf_size = 0; | |
117 | ||
118 | devc->profile = prof; | |
119 | devc->dev_state = IDLE; | |
120 | devc->samplerate = DEFAULT_SAMPLERATE; | |
121 | ||
122 | sdi->priv = devc; | |
123 | drvc = sdi->driver->context; | |
124 | drvc->instances = g_slist_append(drvc->instances, sdi); | |
125 | ||
126 | return sdi; | |
127 | } | |
128 | ||
129 | static int configure_channels(const struct sr_dev_inst *sdi) | |
130 | { | |
131 | struct dev_context *devc; | |
132 | const GSList *l; | |
133 | int p; | |
134 | struct sr_channel *ch; | |
135 | devc = sdi->priv; | |
136 | ||
137 | g_slist_free(devc->enabled_channels); | |
138 | devc->enabled_channels = NULL; | |
139 | memset(devc->ch_enabled, 0, sizeof(devc->ch_enabled)); | |
140 | ||
141 | for (l = sdi->channels, p = 0; l; l = l->next, p++) { | |
142 | ch = l->data; | |
143 | if (p < NUM_CHANNELS) { | |
144 | devc->ch_enabled[p] = ch->enabled; | |
145 | devc->enabled_channels = g_slist_append(devc->enabled_channels, ch); | |
146 | } | |
147 | } | |
148 | ||
149 | return SR_OK; | |
150 | } | |
151 | ||
152 | static void clear_dev_context(void *priv) | |
153 | { | |
154 | struct dev_context *devc; | |
155 | ||
156 | devc = priv; | |
157 | g_slist_free(devc->enabled_channels); | |
158 | g_free(devc); | |
159 | } | |
160 | ||
161 | static int dev_clear(const struct sr_dev_driver *di) | |
162 | { | |
163 | return std_dev_clear(di, clear_dev_context); | |
164 | } | |
165 | ||
166 | static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx) | |
167 | { | |
168 | return std_init(sr_ctx, di, LOG_PREFIX); | |
169 | } | |
170 | ||
171 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
172 | { | |
173 | struct drv_context *drvc; | |
174 | struct dev_context *devc; | |
175 | struct sr_dev_inst *sdi; | |
176 | struct sr_usb_dev_inst *usb; | |
177 | struct sr_config *src; | |
178 | const struct hantek_6xxx_profile *prof; | |
179 | GSList *l, *devices, *conn_devices; | |
180 | struct libusb_device_descriptor des; | |
181 | libusb_device **devlist; | |
182 | int i, j; | |
183 | const char *conn; | |
184 | char connection_id[64]; | |
185 | ||
186 | drvc = di->context; | |
187 | ||
188 | devices = 0; | |
189 | ||
190 | conn = NULL; | |
191 | for (l = options; l; l = l->next) { | |
192 | src = l->data; | |
193 | if (src->key == SR_CONF_CONN) { | |
194 | conn = g_variant_get_string(src->data, NULL); | |
195 | break; | |
196 | } | |
197 | } | |
198 | if (conn) | |
199 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn); | |
200 | else | |
201 | conn_devices = NULL; | |
202 | ||
203 | /* Find all Hantek 60xx devices and upload firmware to all of them. */ | |
204 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
205 | for (i = 0; devlist[i]; i++) { | |
206 | if (conn) { | |
207 | usb = NULL; | |
208 | for (l = conn_devices; l; l = l->next) { | |
209 | usb = l->data; | |
210 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
211 | && usb->address == libusb_get_device_address(devlist[i])) | |
212 | break; | |
213 | } | |
214 | if (!l) | |
215 | /* This device matched none of the ones that | |
216 | * matched the conn specification. */ | |
217 | continue; | |
218 | } | |
219 | ||
220 | libusb_get_device_descriptor(devlist[i], &des); | |
221 | ||
222 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
223 | ||
224 | prof = NULL; | |
225 | for (j = 0; j < (int)ARRAY_SIZE(dev_profiles); j++) { | |
226 | if (des.idVendor == dev_profiles[j].orig_vid | |
227 | && des.idProduct == dev_profiles[j].orig_pid) { | |
228 | /* Device matches the pre-firmware profile. */ | |
229 | prof = &dev_profiles[j]; | |
230 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
231 | sdi = hantek_6xxx_dev_new(prof); | |
232 | sdi->connection_id = g_strdup(connection_id); | |
233 | devices = g_slist_append(devices, sdi); | |
234 | devc = sdi->priv; | |
235 | if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i], | |
236 | USB_CONFIGURATION, prof->firmware) == SR_OK) | |
237 | /* Remember when the firmware on this device was updated. */ | |
238 | devc->fw_updated = g_get_monotonic_time(); | |
239 | else | |
240 | sr_err("Firmware upload failed."); | |
241 | /* Dummy USB address of 0xff will get overwritten later. */ | |
242 | sdi->conn = sr_usb_dev_inst_new( | |
243 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
244 | break; | |
245 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
246 | && des.idProduct == dev_profiles[j].fw_pid) { | |
247 | /* Device matches the post-firmware profile. */ | |
248 | prof = &dev_profiles[j]; | |
249 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
250 | sdi = hantek_6xxx_dev_new(prof); | |
251 | sdi->connection_id = g_strdup(connection_id); | |
252 | sdi->status = SR_ST_INACTIVE; | |
253 | devices = g_slist_append(devices, sdi); | |
254 | sdi->inst_type = SR_INST_USB; | |
255 | sdi->conn = sr_usb_dev_inst_new( | |
256 | libusb_get_bus_number(devlist[i]), | |
257 | libusb_get_device_address(devlist[i]), NULL); | |
258 | break; | |
259 | } | |
260 | } | |
261 | if (!prof) | |
262 | /* Not a supported VID/PID. */ | |
263 | continue; | |
264 | } | |
265 | libusb_free_device_list(devlist, 1); | |
266 | ||
267 | return devices; | |
268 | } | |
269 | ||
270 | static int dev_open(struct sr_dev_inst *sdi) | |
271 | { | |
272 | struct dev_context *devc; | |
273 | struct sr_usb_dev_inst *usb; | |
274 | int64_t timediff_us, timediff_ms; | |
275 | int err; | |
276 | ||
277 | devc = sdi->priv; | |
278 | usb = sdi->conn; | |
279 | ||
280 | /* | |
281 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
282 | * for the FX2 to renumerate. | |
283 | */ | |
284 | err = SR_ERR; | |
285 | if (devc->fw_updated > 0) { | |
286 | sr_info("Waiting for device to reset."); | |
287 | /* Takes >= 300ms for the FX2 to be gone from the USB bus. */ | |
288 | g_usleep(300 * 1000); | |
289 | timediff_ms = 0; | |
290 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
291 | if ((err = hantek_6xxx_open(sdi)) == SR_OK) | |
292 | break; | |
293 | g_usleep(100 * 1000); | |
294 | timediff_us = g_get_monotonic_time() - devc->fw_updated; | |
295 | timediff_ms = timediff_us / 1000; | |
296 | sr_spew("Waited %" PRIi64 " ms.", timediff_ms); | |
297 | } | |
298 | if (timediff_ms < MAX_RENUM_DELAY_MS) | |
299 | sr_info("Device came back after %"PRIu64" ms.", timediff_ms); | |
300 | } else { | |
301 | err = hantek_6xxx_open(sdi); | |
302 | } | |
303 | ||
304 | if (err != SR_OK) { | |
305 | sr_err("Unable to open device."); | |
306 | return SR_ERR; | |
307 | } | |
308 | ||
309 | err = libusb_claim_interface(usb->devhdl, USB_INTERFACE); | |
310 | if (err != 0) { | |
311 | sr_err("Unable to claim interface: %s.", | |
312 | libusb_error_name(err)); | |
313 | return SR_ERR; | |
314 | } | |
315 | ||
316 | return SR_OK; | |
317 | } | |
318 | ||
319 | static int dev_close(struct sr_dev_inst *sdi) | |
320 | { | |
321 | hantek_6xxx_close(sdi); | |
322 | ||
323 | return SR_OK; | |
324 | } | |
325 | ||
326 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
327 | const struct sr_channel_group *cg) | |
328 | { | |
329 | struct dev_context *devc; | |
330 | struct sr_usb_dev_inst *usb; | |
331 | char str[128]; | |
332 | const uint64_t *vdiv; | |
333 | int ch_idx; | |
334 | ||
335 | switch (key) { | |
336 | case SR_CONF_NUM_VDIV: | |
337 | *data = g_variant_new_int32(ARRAY_SIZE(vdivs)); | |
338 | break; | |
339 | } | |
340 | ||
341 | if (!sdi) | |
342 | return SR_ERR_ARG; | |
343 | ||
344 | devc = sdi->priv; | |
345 | if (!cg) { | |
346 | switch (key) { | |
347 | case SR_CONF_SAMPLERATE: | |
348 | *data = g_variant_new_uint64(devc->samplerate); | |
349 | break; | |
350 | case SR_CONF_LIMIT_MSEC: | |
351 | *data = g_variant_new_uint64(devc->limit_msec); | |
352 | break; | |
353 | case SR_CONF_LIMIT_SAMPLES: | |
354 | *data = g_variant_new_uint64(devc->limit_samples); | |
355 | break; | |
356 | case SR_CONF_CONN: | |
357 | if (!sdi->conn) | |
358 | return SR_ERR_ARG; | |
359 | usb = sdi->conn; | |
360 | if (usb->address == 255) | |
361 | /* Device still needs to re-enumerate after firmware | |
362 | * upload, so we don't know its (future) address. */ | |
363 | return SR_ERR; | |
364 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
365 | *data = g_variant_new_string(str); | |
366 | break; | |
367 | default: | |
368 | return SR_ERR_NA; | |
369 | } | |
370 | } else { | |
371 | if (sdi->channel_groups->data == cg) | |
372 | ch_idx = 0; | |
373 | else if (sdi->channel_groups->next->data == cg) | |
374 | ch_idx = 1; | |
375 | else | |
376 | return SR_ERR_ARG; | |
377 | switch (key) { | |
378 | case SR_CONF_VDIV: | |
379 | vdiv = vdivs[devc->voltage[ch_idx]]; | |
380 | *data = g_variant_new("(tt)", vdiv[0], vdiv[1]); | |
381 | break; | |
382 | case SR_CONF_COUPLING: | |
383 | *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]); | |
384 | break; | |
385 | } | |
386 | } | |
387 | ||
388 | return SR_OK; | |
389 | } | |
390 | ||
391 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
392 | const struct sr_channel_group *cg) | |
393 | { | |
394 | struct dev_context *devc; | |
395 | uint64_t p, q; | |
396 | int tmp_int, ch_idx, ret; | |
397 | unsigned int i; | |
398 | const char *tmp_str; | |
399 | ||
400 | if (sdi->status != SR_ST_ACTIVE) | |
401 | return SR_ERR_DEV_CLOSED; | |
402 | ||
403 | ret = SR_OK; | |
404 | devc = sdi->priv; | |
405 | if (!cg) { | |
406 | switch (key) { | |
407 | case SR_CONF_SAMPLERATE: | |
408 | devc->samplerate = g_variant_get_uint64(data); | |
409 | hantek_6xxx_update_samplerate(sdi); | |
410 | break; | |
411 | case SR_CONF_LIMIT_MSEC: | |
412 | devc->limit_msec = g_variant_get_uint64(data); | |
413 | break; | |
414 | case SR_CONF_LIMIT_SAMPLES: | |
415 | devc->limit_samples = g_variant_get_uint64(data); | |
416 | break; | |
417 | default: | |
418 | ret = SR_ERR_NA; | |
419 | break; | |
420 | } | |
421 | } else { | |
422 | if (sdi->channel_groups->data == cg) | |
423 | ch_idx = 0; | |
424 | else if (sdi->channel_groups->next->data == cg) | |
425 | ch_idx = 1; | |
426 | else | |
427 | return SR_ERR_ARG; | |
428 | switch (key) { | |
429 | case SR_CONF_VDIV: | |
430 | g_variant_get(data, "(tt)", &p, &q); | |
431 | tmp_int = -1; | |
432 | for (i = 0; i < ARRAY_SIZE(vdivs); i++) { | |
433 | if (vdivs[i][0] == p && vdivs[i][1] == q) { | |
434 | tmp_int = i; | |
435 | break; | |
436 | } | |
437 | } | |
438 | if (tmp_int >= 0) { | |
439 | devc->voltage[ch_idx] = tmp_int; | |
440 | hantek_6xxx_update_vdiv(sdi); | |
441 | } else | |
442 | ret = SR_ERR_ARG; | |
443 | break; | |
444 | case SR_CONF_COUPLING: | |
445 | tmp_str = g_variant_get_string(data, NULL); | |
446 | for (i = 0; coupling[i]; i++) { | |
447 | if (!strcmp(tmp_str, coupling[i])) { | |
448 | devc->coupling[ch_idx] = i; | |
449 | break; | |
450 | } | |
451 | } | |
452 | if (coupling[i] == 0) | |
453 | ret = SR_ERR_ARG; | |
454 | break; | |
455 | default: | |
456 | ret = SR_ERR_NA; | |
457 | break; | |
458 | } | |
459 | } | |
460 | ||
461 | return ret; | |
462 | } | |
463 | ||
464 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
465 | const struct sr_channel_group *cg) | |
466 | { | |
467 | GVariant *tuple, *rational[2]; | |
468 | GVariantBuilder gvb; | |
469 | unsigned int i; | |
470 | GVariant *gvar; | |
471 | ||
472 | if (key == SR_CONF_SCAN_OPTIONS) { | |
473 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
474 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
475 | return SR_OK; | |
476 | } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { | |
477 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
478 | drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); | |
479 | return SR_OK; | |
480 | } | |
481 | ||
482 | if (!sdi) | |
483 | return SR_ERR_ARG; | |
484 | ||
485 | if (!cg) { | |
486 | switch (key) { | |
487 | case SR_CONF_DEVICE_OPTIONS: | |
488 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
489 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
490 | break; | |
491 | case SR_CONF_SAMPLERATE: | |
492 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
493 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
494 | samplerates, ARRAY_SIZE(samplerates), | |
495 | sizeof(uint64_t)); | |
496 | g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); | |
497 | *data = g_variant_builder_end(&gvb); | |
498 | break; | |
499 | default: | |
500 | return SR_ERR_NA; | |
501 | } | |
502 | } else { | |
503 | switch (key) { | |
504 | case SR_CONF_DEVICE_OPTIONS: | |
505 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
506 | devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t)); | |
507 | break; | |
508 | case SR_CONF_COUPLING: | |
509 | *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling)); | |
510 | break; | |
511 | case SR_CONF_VDIV: | |
512 | g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY); | |
513 | for (i = 0; i < ARRAY_SIZE(vdivs); i++) { | |
514 | rational[0] = g_variant_new_uint64(vdivs[i][0]); | |
515 | rational[1] = g_variant_new_uint64(vdivs[i][1]); | |
516 | tuple = g_variant_new_tuple(rational, 2); | |
517 | g_variant_builder_add_value(&gvb, tuple); | |
518 | } | |
519 | *data = g_variant_builder_end(&gvb); | |
520 | break; | |
521 | default: | |
522 | return SR_ERR_NA; | |
523 | } | |
524 | } | |
525 | ||
526 | return SR_OK; | |
527 | } | |
528 | ||
529 | /* Minimise data amount for limit_samples and limit_msec limits. */ | |
530 | static uint32_t data_amount(const struct sr_dev_inst *sdi) | |
531 | { | |
532 | struct dev_context *devc = sdi->priv; | |
533 | uint32_t data_left; | |
534 | int32_t time_left; | |
535 | ||
536 | if (devc->limit_msec) { | |
537 | time_left = devc->limit_msec - (g_get_monotonic_time() - devc->aq_started) / 1000; | |
538 | data_left = devc->samplerate * MAX(time_left, 0) * NUM_CHANNELS / 1000; | |
539 | } else if (devc->limit_samples) { | |
540 | data_left = (devc->limit_samples - devc->samp_received) * NUM_CHANNELS; | |
541 | } else { | |
542 | data_left = devc->samplerate * NUM_CHANNELS; | |
543 | } | |
544 | ||
545 | data_left += MIN_PACKET_SIZE; /* Driver does not handle small buffers. */ | |
546 | ||
547 | sr_spew("data_amount %u", data_left); | |
548 | ||
549 | return data_left; | |
550 | } | |
551 | ||
552 | static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf, | |
553 | int num_samples) | |
554 | { | |
555 | struct sr_datafeed_packet packet; | |
556 | struct sr_datafeed_analog_old analog; | |
557 | struct dev_context *devc = sdi->priv; | |
558 | int num_channels, data_offset, i; | |
559 | ||
560 | const float ch1_bit = RANGE(0) / 255; | |
561 | const float ch2_bit = RANGE(1) / 255; | |
562 | const float ch1_center = RANGE(0) / 2; | |
563 | const float ch2_center = RANGE(1) / 2; | |
564 | ||
565 | const gboolean ch1_ena = !!devc->ch_enabled[0]; | |
566 | const gboolean ch2_ena = !!devc->ch_enabled[1]; | |
567 | ||
568 | num_channels = (ch1_ena && ch2_ena) ? 2 : 1; | |
569 | packet.type = SR_DF_ANALOG_OLD; | |
570 | packet.payload = &analog; | |
571 | ||
572 | analog.channels = devc->enabled_channels; | |
573 | analog.num_samples = num_samples; | |
574 | analog.mq = SR_MQ_VOLTAGE; | |
575 | analog.unit = SR_UNIT_VOLT; | |
576 | analog.mqflags = 0; | |
577 | ||
578 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels); | |
579 | if (!analog.data) { | |
580 | sr_err("Analog data buffer malloc failed."); | |
581 | devc->dev_state = STOPPING; | |
582 | return; | |
583 | } | |
584 | ||
585 | data_offset = 0; | |
586 | for (i = 0; i < num_samples; i++) { | |
587 | /* | |
588 | * The device always sends data for both channels. If a channel | |
589 | * is disabled, it contains a copy of the enabled channel's | |
590 | * data. However, we only send the requested channels to | |
591 | * the bus. | |
592 | * | |
593 | * Voltage values are encoded as a value 0-255, where the | |
594 | * value is a point in the range represented by the vdiv | |
595 | * setting. There are 10 vertical divs, so e.g. 500mV/div | |
596 | * represents 5V peak-to-peak where 0 = -2.5V and 255 = +2.5V. | |
597 | */ | |
598 | if (ch1_ena) | |
599 | analog.data[data_offset++] = (ch1_bit * *(buf + i * 2) - ch1_center); | |
600 | if (ch2_ena) | |
601 | analog.data[data_offset++] = (ch2_bit * *(buf + i * 2 + 1) - ch2_center); | |
602 | } | |
603 | ||
604 | sr_session_send(sdi, &packet); | |
605 | g_free(analog.data); | |
606 | } | |
607 | ||
608 | static void send_data(struct sr_dev_inst *sdi, struct libusb_transfer *buf[], uint64_t samples) | |
609 | { | |
610 | int i = 0; | |
611 | uint64_t send = 0; | |
612 | uint32_t chunk; | |
613 | ||
614 | while (send < samples) { | |
615 | chunk = MIN(samples - send, (uint64_t)(buf[i]->actual_length / NUM_CHANNELS)); | |
616 | send += chunk; | |
617 | send_chunk(sdi, buf[i]->buffer, chunk); | |
618 | ||
619 | /* | |
620 | * Everything in this transfer was either copied to the buffer | |
621 | * or sent to the session bus. | |
622 | */ | |
623 | g_free(buf[i]->buffer); | |
624 | libusb_free_transfer(buf[i]); | |
625 | i++; | |
626 | } | |
627 | } | |
628 | ||
629 | /* | |
630 | * Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
631 | * Only channel data comes in asynchronously, and all transfers for this are | |
632 | * queued up beforehand, so this just needs to chuck the incoming data onto | |
633 | * the libsigrok session bus. | |
634 | */ | |
635 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
636 | { | |
637 | struct sr_dev_inst *sdi; | |
638 | struct dev_context *devc; | |
639 | ||
640 | sdi = transfer->user_data; | |
641 | devc = sdi->priv; | |
642 | ||
643 | if (devc->dev_state == FLUSH) { | |
644 | g_free(transfer->buffer); | |
645 | libusb_free_transfer(transfer); | |
646 | devc->dev_state = CAPTURE; | |
647 | devc->aq_started = g_get_monotonic_time(); | |
648 | read_channel(sdi, data_amount(sdi)); | |
649 | return; | |
650 | } | |
651 | ||
652 | if (devc->dev_state != CAPTURE) | |
653 | return; | |
654 | ||
655 | if (!devc->sample_buf) { | |
656 | devc->sample_buf_size = 10; | |
657 | devc->sample_buf = g_try_malloc(devc->sample_buf_size * sizeof(transfer)); | |
658 | devc->sample_buf_write = 0; | |
659 | } | |
660 | ||
661 | if (devc->sample_buf_write >= devc->sample_buf_size) { | |
662 | devc->sample_buf_size += 10; | |
663 | devc->sample_buf = g_try_realloc(devc->sample_buf, | |
664 | devc->sample_buf_size * sizeof(transfer)); | |
665 | if (!devc->sample_buf) { | |
666 | sr_err("Sample buffer malloc failed."); | |
667 | devc->dev_state = STOPPING; | |
668 | return; | |
669 | } | |
670 | } | |
671 | ||
672 | devc->sample_buf[devc->sample_buf_write++] = transfer; | |
673 | devc->samp_received += transfer->actual_length / NUM_CHANNELS; | |
674 | ||
675 | sr_spew("receive_transfer(): calculated samplerate == %" PRIu64 "ks/s", | |
676 | (uint64_t)(transfer->actual_length * 1000 / | |
677 | (g_get_monotonic_time() - devc->read_start_ts + 1) / | |
678 | NUM_CHANNELS)); | |
679 | ||
680 | sr_spew("receive_transfer(): status %s received %d bytes.", | |
681 | libusb_error_name(transfer->status), transfer->actual_length); | |
682 | ||
683 | if (transfer->actual_length == 0) | |
684 | /* Nothing to send to the bus. */ | |
685 | return; | |
686 | ||
687 | if (devc->limit_samples && devc->samp_received >= devc->limit_samples) { | |
688 | sr_info("Requested number of samples reached, stopping. %" | |
689 | PRIu64 " <= %" PRIu64, devc->limit_samples, | |
690 | devc->samp_received); | |
691 | send_data(sdi, devc->sample_buf, devc->limit_samples); | |
692 | sdi->driver->dev_acquisition_stop(sdi); | |
693 | } else if (devc->limit_msec && (g_get_monotonic_time() - | |
694 | devc->aq_started) / 1000 >= devc->limit_msec) { | |
695 | sr_info("Requested time limit reached, stopping. %d <= %d", | |
696 | (uint32_t)devc->limit_msec, | |
697 | (uint32_t)(g_get_monotonic_time() - devc->aq_started) / 1000); | |
698 | send_data(sdi, devc->sample_buf, devc->samp_received); | |
699 | g_free(devc->sample_buf); | |
700 | devc->sample_buf = NULL; | |
701 | sdi->driver->dev_acquisition_stop(sdi); | |
702 | } else { | |
703 | read_channel(sdi, data_amount(sdi)); | |
704 | } | |
705 | } | |
706 | ||
707 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount) | |
708 | { | |
709 | int ret; | |
710 | struct dev_context *devc; | |
711 | ||
712 | devc = sdi->priv; | |
713 | ||
714 | amount = MIN(amount, MAX_PACKET_SIZE); | |
715 | ret = hantek_6xxx_get_channeldata(sdi, receive_transfer, amount); | |
716 | devc->read_start_ts = g_get_monotonic_time(); | |
717 | devc->read_data_amount = amount; | |
718 | ||
719 | return ret; | |
720 | } | |
721 | ||
722 | static int handle_event(int fd, int revents, void *cb_data) | |
723 | { | |
724 | const struct sr_dev_inst *sdi; | |
725 | struct timeval tv; | |
726 | struct sr_dev_driver *di; | |
727 | struct dev_context *devc; | |
728 | struct drv_context *drvc; | |
729 | ||
730 | (void)fd; | |
731 | (void)revents; | |
732 | ||
733 | sdi = cb_data; | |
734 | di = sdi->driver; | |
735 | drvc = di->context; | |
736 | devc = sdi->priv; | |
737 | ||
738 | /* Always handle pending libusb events. */ | |
739 | tv.tv_sec = tv.tv_usec = 0; | |
740 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
741 | ||
742 | if (devc->dev_state == STOPPING) { | |
743 | /* We've been told to wind up the acquisition. */ | |
744 | sr_dbg("Stopping acquisition."); | |
745 | ||
746 | hantek_6xxx_stop_data_collecting(sdi); | |
747 | /* | |
748 | * TODO: Doesn't really cancel pending transfers so they might | |
749 | * come in after SR_DF_END is sent. | |
750 | */ | |
751 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
752 | ||
753 | std_session_send_df_end(sdi, LOG_PREFIX); | |
754 | ||
755 | devc->dev_state = IDLE; | |
756 | ||
757 | return TRUE; | |
758 | } | |
759 | ||
760 | return TRUE; | |
761 | } | |
762 | ||
763 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
764 | { | |
765 | struct dev_context *devc; | |
766 | struct sr_dev_driver *di = sdi->driver; | |
767 | struct drv_context *drvc = di->context; | |
768 | ||
769 | if (sdi->status != SR_ST_ACTIVE) | |
770 | return SR_ERR_DEV_CLOSED; | |
771 | ||
772 | devc = sdi->priv; | |
773 | ||
774 | if (configure_channels(sdi) != SR_OK) { | |
775 | sr_err("Failed to configure channels."); | |
776 | return SR_ERR; | |
777 | } | |
778 | ||
779 | if (hantek_6xxx_init(sdi) != SR_OK) | |
780 | return SR_ERR; | |
781 | ||
782 | std_session_send_df_header(sdi, LOG_PREFIX); | |
783 | ||
784 | devc->samp_received = 0; | |
785 | devc->dev_state = FLUSH; | |
786 | ||
787 | usb_source_add(sdi->session, drvc->sr_ctx, TICK, | |
788 | handle_event, (void *)sdi); | |
789 | ||
790 | hantek_6xxx_start_data_collecting(sdi); | |
791 | ||
792 | read_channel(sdi, FLUSH_PACKET_SIZE); | |
793 | ||
794 | return SR_OK; | |
795 | } | |
796 | ||
797 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
798 | { | |
799 | struct dev_context *devc; | |
800 | ||
801 | if (sdi->status != SR_ST_ACTIVE) | |
802 | return SR_ERR; | |
803 | ||
804 | devc = sdi->priv; | |
805 | devc->dev_state = STOPPING; | |
806 | ||
807 | g_free(devc->sample_buf); devc->sample_buf = NULL; | |
808 | ||
809 | return SR_OK; | |
810 | } | |
811 | ||
812 | SR_PRIV struct sr_dev_driver hantek_6xxx_driver_info = { | |
813 | .name = "hantek-6xxx", | |
814 | .longname = "Hantek 6xxx", | |
815 | .api_version = 1, | |
816 | .init = init, | |
817 | .cleanup = std_cleanup, | |
818 | .scan = scan, | |
819 | .dev_list = std_dev_list, | |
820 | .dev_clear = dev_clear, | |
821 | .config_get = config_get, | |
822 | .config_set = config_set, | |
823 | .config_list = config_list, | |
824 | .dev_open = dev_open, | |
825 | .dev_close = dev_close, | |
826 | .dev_acquisition_start = dev_acquisition_start, | |
827 | .dev_acquisition_stop = dev_acquisition_stop, | |
828 | .context = NULL, | |
829 | }; |