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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 <math.h> | |
22 | #include "protocol.h" | |
23 | ||
24 | /* Max time in ms before we want to check on USB events */ | |
25 | #define TICK 200 | |
26 | ||
27 | #define RANGE(ch) (((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * VDIV_MULTIPLIER) | |
28 | ||
29 | static const uint32_t scanopts[] = { | |
30 | SR_CONF_CONN, | |
31 | }; | |
32 | ||
33 | static const uint32_t drvopts[] = { | |
34 | SR_CONF_OSCILLOSCOPE, | |
35 | }; | |
36 | ||
37 | static const uint32_t devopts[] = { | |
38 | SR_CONF_CONN | SR_CONF_GET, | |
39 | SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET, | |
40 | SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET, | |
41 | SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
42 | SR_CONF_NUM_VDIV | SR_CONF_GET, | |
43 | }; | |
44 | ||
45 | static const uint32_t devopts_cg[] = { | |
46 | SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
47 | SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST, | |
48 | }; | |
49 | ||
50 | static const char *channel_names[] = { | |
51 | "CH1", "CH2", | |
52 | }; | |
53 | ||
54 | static const char *dc_coupling[] = { | |
55 | "DC", | |
56 | }; | |
57 | ||
58 | static const char *acdc_coupling[] = { | |
59 | "AC", "DC", | |
60 | }; | |
61 | ||
62 | static const struct hantek_6xxx_profile dev_profiles[] = { | |
63 | { | |
64 | 0x04b4, 0x6022, 0x1d50, 0x608e, 0x0001, | |
65 | "Hantek", "6022BE", "fx2lafw-hantek-6022be.fw", | |
66 | dc_coupling, ARRAY_SIZE(dc_coupling), FALSE, | |
67 | }, | |
68 | { | |
69 | 0x8102, 0x8102, 0x1d50, 0x608e, 0x0002, | |
70 | "Sainsmart", "DDS120", "fx2lafw-sainsmart-dds120.fw", | |
71 | acdc_coupling, ARRAY_SIZE(acdc_coupling), TRUE, | |
72 | }, | |
73 | { | |
74 | 0x04b4, 0x602a, 0x1d50, 0x608e, 0x0003, | |
75 | "Hantek", "6022BL", "fx2lafw-hantek-6022bl.fw", | |
76 | dc_coupling, ARRAY_SIZE(dc_coupling), FALSE, | |
77 | }, | |
78 | ALL_ZERO | |
79 | }; | |
80 | ||
81 | static const uint64_t samplerates[] = { | |
82 | SAMPLERATE_VALUES | |
83 | }; | |
84 | ||
85 | static const uint64_t vdivs[][2] = { | |
86 | VDIV_VALUES | |
87 | }; | |
88 | ||
89 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount); | |
90 | ||
91 | static int dev_acquisition_stop(struct sr_dev_inst *sdi); | |
92 | ||
93 | static struct sr_dev_inst *hantek_6xxx_dev_new(const struct hantek_6xxx_profile *prof) | |
94 | { | |
95 | struct sr_dev_inst *sdi; | |
96 | struct sr_channel *ch; | |
97 | struct sr_channel_group *cg; | |
98 | struct dev_context *devc; | |
99 | unsigned int i; | |
100 | ||
101 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
102 | sdi->status = SR_ST_INITIALIZING; | |
103 | sdi->vendor = g_strdup(prof->vendor); | |
104 | sdi->model = g_strdup(prof->model); | |
105 | ||
106 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) { | |
107 | ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]); | |
108 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
109 | cg->name = g_strdup(channel_names[i]); | |
110 | cg->channels = g_slist_append(cg->channels, ch); | |
111 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
112 | } | |
113 | ||
114 | devc = g_malloc0(sizeof(struct dev_context)); | |
115 | ||
116 | for (i = 0; i < NUM_CHANNELS; i++) { | |
117 | devc->ch_enabled[i] = TRUE; | |
118 | devc->voltage[i] = DEFAULT_VOLTAGE; | |
119 | devc->coupling[i] = DEFAULT_COUPLING; | |
120 | } | |
121 | devc->coupling_vals = prof->coupling_vals; | |
122 | devc->coupling_tab_size = prof->coupling_tab_size; | |
123 | devc->has_coupling = prof->has_coupling; | |
124 | ||
125 | devc->sample_buf = NULL; | |
126 | devc->sample_buf_write = 0; | |
127 | devc->sample_buf_size = 0; | |
128 | ||
129 | devc->profile = prof; | |
130 | devc->dev_state = IDLE; | |
131 | devc->samplerate = DEFAULT_SAMPLERATE; | |
132 | ||
133 | sdi->priv = devc; | |
134 | ||
135 | return sdi; | |
136 | } | |
137 | ||
138 | static int configure_channels(const struct sr_dev_inst *sdi) | |
139 | { | |
140 | struct dev_context *devc; | |
141 | const GSList *l; | |
142 | int p; | |
143 | struct sr_channel *ch; | |
144 | devc = sdi->priv; | |
145 | ||
146 | g_slist_free(devc->enabled_channels); | |
147 | devc->enabled_channels = NULL; | |
148 | memset(devc->ch_enabled, 0, sizeof(devc->ch_enabled)); | |
149 | ||
150 | for (l = sdi->channels, p = 0; l; l = l->next, p++) { | |
151 | ch = l->data; | |
152 | if (p < NUM_CHANNELS) { | |
153 | devc->ch_enabled[p] = ch->enabled; | |
154 | devc->enabled_channels = g_slist_append(devc->enabled_channels, ch); | |
155 | } | |
156 | } | |
157 | ||
158 | return SR_OK; | |
159 | } | |
160 | ||
161 | static void clear_dev_context(void *priv) | |
162 | { | |
163 | struct dev_context *devc; | |
164 | ||
165 | devc = priv; | |
166 | g_slist_free(devc->enabled_channels); | |
167 | g_free(devc); | |
168 | } | |
169 | ||
170 | static int dev_clear(const struct sr_dev_driver *di) | |
171 | { | |
172 | return std_dev_clear(di, clear_dev_context); | |
173 | } | |
174 | ||
175 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
176 | { | |
177 | struct drv_context *drvc; | |
178 | struct dev_context *devc; | |
179 | struct sr_dev_inst *sdi; | |
180 | struct sr_usb_dev_inst *usb; | |
181 | struct sr_config *src; | |
182 | const struct hantek_6xxx_profile *prof; | |
183 | GSList *l, *devices, *conn_devices; | |
184 | struct libusb_device_descriptor des; | |
185 | libusb_device **devlist; | |
186 | int i, j; | |
187 | const char *conn; | |
188 | char connection_id[64]; | |
189 | ||
190 | drvc = di->context; | |
191 | ||
192 | devices = 0; | |
193 | ||
194 | conn = NULL; | |
195 | for (l = options; l; l = l->next) { | |
196 | src = l->data; | |
197 | if (src->key == SR_CONF_CONN) { | |
198 | conn = g_variant_get_string(src->data, NULL); | |
199 | break; | |
200 | } | |
201 | } | |
202 | if (conn) | |
203 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn); | |
204 | else | |
205 | conn_devices = NULL; | |
206 | ||
207 | /* Find all Hantek 60xx devices and upload firmware to all of them. */ | |
208 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
209 | for (i = 0; devlist[i]; i++) { | |
210 | if (conn) { | |
211 | usb = NULL; | |
212 | for (l = conn_devices; l; l = l->next) { | |
213 | usb = l->data; | |
214 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
215 | && usb->address == libusb_get_device_address(devlist[i])) | |
216 | break; | |
217 | } | |
218 | if (!l) | |
219 | /* This device matched none of the ones that | |
220 | * matched the conn specification. */ | |
221 | continue; | |
222 | } | |
223 | ||
224 | libusb_get_device_descriptor(devlist[i], &des); | |
225 | ||
226 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
227 | ||
228 | prof = NULL; | |
229 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
230 | if (des.idVendor == dev_profiles[j].orig_vid | |
231 | && des.idProduct == dev_profiles[j].orig_pid) { | |
232 | /* Device matches the pre-firmware profile. */ | |
233 | prof = &dev_profiles[j]; | |
234 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
235 | sdi = hantek_6xxx_dev_new(prof); | |
236 | sdi->connection_id = g_strdup(connection_id); | |
237 | devices = g_slist_append(devices, sdi); | |
238 | devc = sdi->priv; | |
239 | if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i], | |
240 | USB_CONFIGURATION, prof->firmware) == SR_OK) | |
241 | /* Remember when the firmware on this device was updated. */ | |
242 | devc->fw_updated = g_get_monotonic_time(); | |
243 | else | |
244 | sr_err("Firmware upload failed."); | |
245 | /* Dummy USB address of 0xff will get overwritten later. */ | |
246 | sdi->conn = sr_usb_dev_inst_new( | |
247 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
248 | break; | |
249 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
250 | && des.idProduct == dev_profiles[j].fw_pid | |
251 | && des.bcdDevice == dev_profiles[j].fw_prod_ver) { | |
252 | /* Device matches the post-firmware profile. */ | |
253 | prof = &dev_profiles[j]; | |
254 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
255 | sdi = hantek_6xxx_dev_new(prof); | |
256 | sdi->connection_id = g_strdup(connection_id); | |
257 | sdi->status = SR_ST_INACTIVE; | |
258 | devices = g_slist_append(devices, sdi); | |
259 | sdi->inst_type = SR_INST_USB; | |
260 | sdi->conn = sr_usb_dev_inst_new( | |
261 | libusb_get_bus_number(devlist[i]), | |
262 | libusb_get_device_address(devlist[i]), NULL); | |
263 | break; | |
264 | } | |
265 | } | |
266 | if (!prof) | |
267 | /* Not a supported VID/PID. */ | |
268 | continue; | |
269 | } | |
270 | libusb_free_device_list(devlist, 1); | |
271 | ||
272 | return std_scan_complete(di, devices); | |
273 | } | |
274 | ||
275 | static int dev_open(struct sr_dev_inst *sdi) | |
276 | { | |
277 | struct dev_context *devc; | |
278 | struct sr_usb_dev_inst *usb; | |
279 | int64_t timediff_us, timediff_ms; | |
280 | int err; | |
281 | ||
282 | devc = sdi->priv; | |
283 | usb = sdi->conn; | |
284 | ||
285 | /* | |
286 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
287 | * for the FX2 to renumerate. | |
288 | */ | |
289 | err = SR_ERR; | |
290 | if (devc->fw_updated > 0) { | |
291 | sr_info("Waiting for device to reset."); | |
292 | /* Takes >= 300ms for the FX2 to be gone from the USB bus. */ | |
293 | g_usleep(300 * 1000); | |
294 | timediff_ms = 0; | |
295 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
296 | if ((err = hantek_6xxx_open(sdi)) == SR_OK) | |
297 | break; | |
298 | g_usleep(100 * 1000); | |
299 | timediff_us = g_get_monotonic_time() - devc->fw_updated; | |
300 | timediff_ms = timediff_us / 1000; | |
301 | sr_spew("Waited %" PRIi64 " ms.", timediff_ms); | |
302 | } | |
303 | if (timediff_ms < MAX_RENUM_DELAY_MS) | |
304 | sr_info("Device came back after %"PRIu64" ms.", timediff_ms); | |
305 | } else { | |
306 | err = hantek_6xxx_open(sdi); | |
307 | } | |
308 | ||
309 | if (err != SR_OK) { | |
310 | sr_err("Unable to open device."); | |
311 | return SR_ERR; | |
312 | } | |
313 | ||
314 | err = libusb_claim_interface(usb->devhdl, USB_INTERFACE); | |
315 | if (err != 0) { | |
316 | sr_err("Unable to claim interface: %s.", | |
317 | libusb_error_name(err)); | |
318 | return SR_ERR; | |
319 | } | |
320 | ||
321 | return SR_OK; | |
322 | } | |
323 | ||
324 | static int dev_close(struct sr_dev_inst *sdi) | |
325 | { | |
326 | hantek_6xxx_close(sdi); | |
327 | ||
328 | return SR_OK; | |
329 | } | |
330 | ||
331 | static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
332 | const struct sr_channel_group *cg) | |
333 | { | |
334 | struct dev_context *devc; | |
335 | struct sr_usb_dev_inst *usb; | |
336 | char str[128]; | |
337 | const uint64_t *vdiv; | |
338 | int ch_idx; | |
339 | ||
340 | switch (key) { | |
341 | case SR_CONF_NUM_VDIV: | |
342 | *data = g_variant_new_int32(ARRAY_SIZE(vdivs)); | |
343 | break; | |
344 | } | |
345 | ||
346 | if (!sdi) | |
347 | return SR_ERR_ARG; | |
348 | ||
349 | devc = sdi->priv; | |
350 | if (!cg) { | |
351 | switch (key) { | |
352 | case SR_CONF_SAMPLERATE: | |
353 | *data = g_variant_new_uint64(devc->samplerate); | |
354 | break; | |
355 | case SR_CONF_LIMIT_MSEC: | |
356 | *data = g_variant_new_uint64(devc->limit_msec); | |
357 | break; | |
358 | case SR_CONF_LIMIT_SAMPLES: | |
359 | *data = g_variant_new_uint64(devc->limit_samples); | |
360 | break; | |
361 | case SR_CONF_CONN: | |
362 | if (!sdi->conn) | |
363 | return SR_ERR_ARG; | |
364 | usb = sdi->conn; | |
365 | if (usb->address == 255) | |
366 | /* Device still needs to re-enumerate after firmware | |
367 | * upload, so we don't know its (future) address. */ | |
368 | return SR_ERR; | |
369 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
370 | *data = g_variant_new_string(str); | |
371 | break; | |
372 | default: | |
373 | return SR_ERR_NA; | |
374 | } | |
375 | } else { | |
376 | if (sdi->channel_groups->data == cg) | |
377 | ch_idx = 0; | |
378 | else if (sdi->channel_groups->next->data == cg) | |
379 | ch_idx = 1; | |
380 | else | |
381 | return SR_ERR_ARG; | |
382 | switch (key) { | |
383 | case SR_CONF_VDIV: | |
384 | vdiv = vdivs[devc->voltage[ch_idx]]; | |
385 | *data = g_variant_new("(tt)", vdiv[0], vdiv[1]); | |
386 | break; | |
387 | case SR_CONF_COUPLING: | |
388 | *data = g_variant_new_string((devc->coupling[ch_idx] \ | |
389 | == COUPLING_DC) ? "DC" : "AC"); | |
390 | break; | |
391 | } | |
392 | } | |
393 | ||
394 | return SR_OK; | |
395 | } | |
396 | ||
397 | static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi, | |
398 | const struct sr_channel_group *cg) | |
399 | { | |
400 | struct dev_context *devc; | |
401 | uint64_t p, q; | |
402 | int tmp_int, ch_idx, ret; | |
403 | unsigned int i; | |
404 | const char *tmp_str; | |
405 | ||
406 | if (sdi->status != SR_ST_ACTIVE) | |
407 | return SR_ERR_DEV_CLOSED; | |
408 | ||
409 | ret = SR_OK; | |
410 | devc = sdi->priv; | |
411 | if (!cg) { | |
412 | switch (key) { | |
413 | case SR_CONF_SAMPLERATE: | |
414 | devc->samplerate = g_variant_get_uint64(data); | |
415 | hantek_6xxx_update_samplerate(sdi); | |
416 | break; | |
417 | case SR_CONF_LIMIT_MSEC: | |
418 | devc->limit_msec = g_variant_get_uint64(data); | |
419 | break; | |
420 | case SR_CONF_LIMIT_SAMPLES: | |
421 | devc->limit_samples = g_variant_get_uint64(data); | |
422 | break; | |
423 | default: | |
424 | ret = SR_ERR_NA; | |
425 | break; | |
426 | } | |
427 | } else { | |
428 | if (sdi->channel_groups->data == cg) | |
429 | ch_idx = 0; | |
430 | else if (sdi->channel_groups->next->data == cg) | |
431 | ch_idx = 1; | |
432 | else | |
433 | return SR_ERR_ARG; | |
434 | switch (key) { | |
435 | case SR_CONF_VDIV: | |
436 | g_variant_get(data, "(tt)", &p, &q); | |
437 | tmp_int = -1; | |
438 | for (i = 0; i < ARRAY_SIZE(vdivs); i++) { | |
439 | if (vdivs[i][0] == p && vdivs[i][1] == q) { | |
440 | tmp_int = i; | |
441 | break; | |
442 | } | |
443 | } | |
444 | if (tmp_int >= 0) { | |
445 | devc->voltage[ch_idx] = tmp_int; | |
446 | hantek_6xxx_update_vdiv(sdi); | |
447 | } else | |
448 | ret = SR_ERR_ARG; | |
449 | break; | |
450 | case SR_CONF_COUPLING: | |
451 | tmp_str = g_variant_get_string(data, NULL); | |
452 | for (i = 0; i < devc->coupling_tab_size; i++) { | |
453 | if (!strcmp(tmp_str, devc->coupling_vals[i])) { | |
454 | devc->coupling[ch_idx] = i; | |
455 | break; | |
456 | } | |
457 | } | |
458 | if (i == devc->coupling_tab_size) | |
459 | ret = SR_ERR_ARG; | |
460 | break; | |
461 | default: | |
462 | ret = SR_ERR_NA; | |
463 | break; | |
464 | } | |
465 | } | |
466 | ||
467 | return ret; | |
468 | } | |
469 | ||
470 | static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, | |
471 | const struct sr_channel_group *cg) | |
472 | { | |
473 | GVariant *tuple, *rational[2]; | |
474 | GVariantBuilder gvb; | |
475 | unsigned int i; | |
476 | GVariant *gvar; | |
477 | struct dev_context *devc = NULL; | |
478 | ||
479 | if (key == SR_CONF_SCAN_OPTIONS) { | |
480 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
481 | scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t)); | |
482 | return SR_OK; | |
483 | } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) { | |
484 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
485 | drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t)); | |
486 | return SR_OK; | |
487 | } | |
488 | ||
489 | if (sdi) | |
490 | devc = sdi->priv; | |
491 | ||
492 | if (!cg) { | |
493 | switch (key) { | |
494 | case SR_CONF_DEVICE_OPTIONS: | |
495 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
496 | devopts, ARRAY_SIZE(devopts), sizeof(uint32_t)); | |
497 | break; | |
498 | case SR_CONF_SAMPLERATE: | |
499 | g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); | |
500 | gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), | |
501 | samplerates, ARRAY_SIZE(samplerates), | |
502 | sizeof(uint64_t)); | |
503 | g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); | |
504 | *data = g_variant_builder_end(&gvb); | |
505 | break; | |
506 | default: | |
507 | return SR_ERR_NA; | |
508 | } | |
509 | } else { | |
510 | switch (key) { | |
511 | case SR_CONF_DEVICE_OPTIONS: | |
512 | *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32, | |
513 | devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t)); | |
514 | break; | |
515 | case SR_CONF_COUPLING: | |
516 | if (!devc) | |
517 | return SR_ERR_NA; | |
518 | *data = g_variant_new_strv(devc->coupling_vals, devc->coupling_tab_size); | |
519 | break; | |
520 | case SR_CONF_VDIV: | |
521 | g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY); | |
522 | for (i = 0; i < ARRAY_SIZE(vdivs); i++) { | |
523 | rational[0] = g_variant_new_uint64(vdivs[i][0]); | |
524 | rational[1] = g_variant_new_uint64(vdivs[i][1]); | |
525 | tuple = g_variant_new_tuple(rational, 2); | |
526 | g_variant_builder_add_value(&gvb, tuple); | |
527 | } | |
528 | *data = g_variant_builder_end(&gvb); | |
529 | break; | |
530 | default: | |
531 | return SR_ERR_NA; | |
532 | } | |
533 | } | |
534 | ||
535 | return SR_OK; | |
536 | } | |
537 | ||
538 | /* Minimise data amount for limit_samples and limit_msec limits. */ | |
539 | static uint32_t data_amount(const struct sr_dev_inst *sdi) | |
540 | { | |
541 | struct dev_context *devc = sdi->priv; | |
542 | uint32_t data_left, data_left_2, i; | |
543 | int32_t time_left; | |
544 | ||
545 | if (devc->limit_msec) { | |
546 | time_left = devc->limit_msec - (g_get_monotonic_time() - devc->aq_started) / 1000; | |
547 | data_left = devc->samplerate * MAX(time_left, 0) * NUM_CHANNELS / 1000; | |
548 | } else if (devc->limit_samples) { | |
549 | data_left = (devc->limit_samples - devc->samp_received) * NUM_CHANNELS; | |
550 | } else { | |
551 | data_left = devc->samplerate * NUM_CHANNELS; | |
552 | } | |
553 | ||
554 | /* Round up to nearest power of two. */ | |
555 | for (i = MIN_PACKET_SIZE; i < data_left; i *= 2) | |
556 | ; | |
557 | data_left_2 = i; | |
558 | ||
559 | sr_spew("data_amount: %u (rounded to power of 2: %u)", data_left, data_left_2); | |
560 | ||
561 | return data_left_2; | |
562 | } | |
563 | ||
564 | static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf, | |
565 | int num_samples) | |
566 | { | |
567 | struct sr_datafeed_packet packet; | |
568 | struct sr_datafeed_analog analog; | |
569 | struct sr_analog_encoding encoding; | |
570 | struct sr_analog_meaning meaning; | |
571 | struct sr_analog_spec spec; | |
572 | struct dev_context *devc = sdi->priv; | |
573 | GSList *channels = devc->enabled_channels; | |
574 | ||
575 | const float ch_bit[] = { RANGE(0) / 255, RANGE(1) / 255 }; | |
576 | const float ch_center[] = { RANGE(0) / 2, RANGE(1) / 2 }; | |
577 | ||
578 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); | |
579 | ||
580 | packet.type = SR_DF_ANALOG; | |
581 | packet.payload = &analog; | |
582 | ||
583 | analog.num_samples = num_samples; | |
584 | analog.meaning->mq = SR_MQ_VOLTAGE; | |
585 | analog.meaning->unit = SR_UNIT_VOLT; | |
586 | analog.meaning->mqflags = 0; | |
587 | ||
588 | analog.data = g_try_malloc(num_samples * sizeof(float)); | |
589 | if (!analog.data) { | |
590 | sr_err("Analog data buffer malloc failed."); | |
591 | devc->dev_state = STOPPING; | |
592 | return; | |
593 | } | |
594 | ||
595 | for (int ch = 0; ch < 2; ch++) { | |
596 | if (!devc->ch_enabled[ch]) | |
597 | continue; | |
598 | ||
599 | float vdivlog = log10f(ch_bit[ch]); | |
600 | int digits = -(int)vdivlog + (vdivlog < 0.0); | |
601 | analog.encoding->digits = digits; | |
602 | analog.spec->spec_digits = digits; | |
603 | analog.meaning->channels = g_slist_append(NULL, channels->data); | |
604 | ||
605 | for (int i = 0; i < num_samples; i++) { | |
606 | /* | |
607 | * The device always sends data for both channels. If a channel | |
608 | * is disabled, it contains a copy of the enabled channel's | |
609 | * data. However, we only send the requested channels to | |
610 | * the bus. | |
611 | * | |
612 | * Voltage values are encoded as a value 0-255, where the | |
613 | * value is a point in the range represented by the vdiv | |
614 | * setting. There are 10 vertical divs, so e.g. 500mV/div | |
615 | * represents 5V peak-to-peak where 0 = -2.5V and 255 = +2.5V. | |
616 | */ | |
617 | ((float *)analog.data)[i] = ch_bit[ch] * *(buf + i * 2 + ch) - ch_center[ch]; | |
618 | } | |
619 | ||
620 | sr_session_send(sdi, &packet); | |
621 | g_slist_free(analog.meaning->channels); | |
622 | ||
623 | channels = channels->next; | |
624 | } | |
625 | g_free(analog.data); | |
626 | } | |
627 | ||
628 | static void send_data(struct sr_dev_inst *sdi, struct libusb_transfer *buf[], uint64_t samples) | |
629 | { | |
630 | int i = 0; | |
631 | uint64_t send = 0; | |
632 | uint32_t chunk; | |
633 | ||
634 | while (send < samples) { | |
635 | chunk = MIN(samples - send, (uint64_t)(buf[i]->actual_length / NUM_CHANNELS)); | |
636 | send += chunk; | |
637 | send_chunk(sdi, buf[i]->buffer, chunk); | |
638 | ||
639 | /* | |
640 | * Everything in this transfer was either copied to the buffer | |
641 | * or sent to the session bus. | |
642 | */ | |
643 | g_free(buf[i]->buffer); | |
644 | libusb_free_transfer(buf[i]); | |
645 | i++; | |
646 | } | |
647 | } | |
648 | ||
649 | /* | |
650 | * Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
651 | * Only channel data comes in asynchronously, and all transfers for this are | |
652 | * queued up beforehand, so this just needs to chuck the incoming data onto | |
653 | * the libsigrok session bus. | |
654 | */ | |
655 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
656 | { | |
657 | struct sr_dev_inst *sdi; | |
658 | struct dev_context *devc; | |
659 | ||
660 | sdi = transfer->user_data; | |
661 | devc = sdi->priv; | |
662 | ||
663 | if (devc->dev_state == FLUSH) { | |
664 | g_free(transfer->buffer); | |
665 | libusb_free_transfer(transfer); | |
666 | devc->dev_state = CAPTURE; | |
667 | devc->aq_started = g_get_monotonic_time(); | |
668 | read_channel(sdi, data_amount(sdi)); | |
669 | return; | |
670 | } | |
671 | ||
672 | if (devc->dev_state != CAPTURE) | |
673 | return; | |
674 | ||
675 | if (!devc->sample_buf) { | |
676 | devc->sample_buf_size = 10; | |
677 | devc->sample_buf = g_try_malloc(devc->sample_buf_size * sizeof(transfer)); | |
678 | devc->sample_buf_write = 0; | |
679 | } | |
680 | ||
681 | if (devc->sample_buf_write >= devc->sample_buf_size) { | |
682 | devc->sample_buf_size += 10; | |
683 | devc->sample_buf = g_try_realloc(devc->sample_buf, | |
684 | devc->sample_buf_size * sizeof(transfer)); | |
685 | if (!devc->sample_buf) { | |
686 | sr_err("Sample buffer malloc failed."); | |
687 | devc->dev_state = STOPPING; | |
688 | return; | |
689 | } | |
690 | } | |
691 | ||
692 | devc->sample_buf[devc->sample_buf_write++] = transfer; | |
693 | devc->samp_received += transfer->actual_length / NUM_CHANNELS; | |
694 | ||
695 | sr_spew("receive_transfer(): calculated samplerate == %" PRIu64 "ks/s", | |
696 | (uint64_t)(transfer->actual_length * 1000 / | |
697 | (g_get_monotonic_time() - devc->read_start_ts + 1) / | |
698 | NUM_CHANNELS)); | |
699 | ||
700 | sr_spew("receive_transfer(): status %s received %d bytes.", | |
701 | libusb_error_name(transfer->status), transfer->actual_length); | |
702 | ||
703 | if (transfer->actual_length == 0) | |
704 | /* Nothing to send to the bus. */ | |
705 | return; | |
706 | ||
707 | if (devc->limit_samples && devc->samp_received >= devc->limit_samples) { | |
708 | sr_info("Requested number of samples reached, stopping. %" | |
709 | PRIu64 " <= %" PRIu64, devc->limit_samples, | |
710 | devc->samp_received); | |
711 | send_data(sdi, devc->sample_buf, devc->limit_samples); | |
712 | sdi->driver->dev_acquisition_stop(sdi); | |
713 | } else if (devc->limit_msec && (g_get_monotonic_time() - | |
714 | devc->aq_started) / 1000 >= devc->limit_msec) { | |
715 | sr_info("Requested time limit reached, stopping. %d <= %d", | |
716 | (uint32_t)devc->limit_msec, | |
717 | (uint32_t)(g_get_monotonic_time() - devc->aq_started) / 1000); | |
718 | send_data(sdi, devc->sample_buf, devc->samp_received); | |
719 | g_free(devc->sample_buf); | |
720 | devc->sample_buf = NULL; | |
721 | sdi->driver->dev_acquisition_stop(sdi); | |
722 | } else { | |
723 | read_channel(sdi, data_amount(sdi)); | |
724 | } | |
725 | } | |
726 | ||
727 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount) | |
728 | { | |
729 | int ret; | |
730 | struct dev_context *devc; | |
731 | ||
732 | devc = sdi->priv; | |
733 | ||
734 | amount = MIN(amount, MAX_PACKET_SIZE); | |
735 | ret = hantek_6xxx_get_channeldata(sdi, receive_transfer, amount); | |
736 | devc->read_start_ts = g_get_monotonic_time(); | |
737 | devc->read_data_amount = amount; | |
738 | ||
739 | return ret; | |
740 | } | |
741 | ||
742 | static int handle_event(int fd, int revents, void *cb_data) | |
743 | { | |
744 | const struct sr_dev_inst *sdi; | |
745 | struct timeval tv; | |
746 | struct sr_dev_driver *di; | |
747 | struct dev_context *devc; | |
748 | struct drv_context *drvc; | |
749 | ||
750 | (void)fd; | |
751 | (void)revents; | |
752 | ||
753 | sdi = cb_data; | |
754 | di = sdi->driver; | |
755 | drvc = di->context; | |
756 | devc = sdi->priv; | |
757 | ||
758 | /* Always handle pending libusb events. */ | |
759 | tv.tv_sec = tv.tv_usec = 0; | |
760 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
761 | ||
762 | if (devc->dev_state == STOPPING) { | |
763 | /* We've been told to wind up the acquisition. */ | |
764 | sr_dbg("Stopping acquisition."); | |
765 | ||
766 | hantek_6xxx_stop_data_collecting(sdi); | |
767 | /* | |
768 | * TODO: Doesn't really cancel pending transfers so they might | |
769 | * come in after SR_DF_END is sent. | |
770 | */ | |
771 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
772 | ||
773 | std_session_send_df_end(sdi); | |
774 | ||
775 | devc->dev_state = IDLE; | |
776 | ||
777 | return TRUE; | |
778 | } | |
779 | ||
780 | return TRUE; | |
781 | } | |
782 | ||
783 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
784 | { | |
785 | struct dev_context *devc; | |
786 | struct sr_dev_driver *di = sdi->driver; | |
787 | struct drv_context *drvc = di->context; | |
788 | ||
789 | if (sdi->status != SR_ST_ACTIVE) | |
790 | return SR_ERR_DEV_CLOSED; | |
791 | ||
792 | devc = sdi->priv; | |
793 | ||
794 | if (configure_channels(sdi) != SR_OK) { | |
795 | sr_err("Failed to configure channels."); | |
796 | return SR_ERR; | |
797 | } | |
798 | ||
799 | if (hantek_6xxx_init(sdi) != SR_OK) | |
800 | return SR_ERR; | |
801 | ||
802 | std_session_send_df_header(sdi); | |
803 | ||
804 | devc->samp_received = 0; | |
805 | devc->dev_state = FLUSH; | |
806 | ||
807 | usb_source_add(sdi->session, drvc->sr_ctx, TICK, | |
808 | handle_event, (void *)sdi); | |
809 | ||
810 | hantek_6xxx_start_data_collecting(sdi); | |
811 | ||
812 | read_channel(sdi, FLUSH_PACKET_SIZE); | |
813 | ||
814 | return SR_OK; | |
815 | } | |
816 | ||
817 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
818 | { | |
819 | struct dev_context *devc; | |
820 | ||
821 | if (sdi->status != SR_ST_ACTIVE) | |
822 | return SR_ERR; | |
823 | ||
824 | devc = sdi->priv; | |
825 | devc->dev_state = STOPPING; | |
826 | ||
827 | g_free(devc->sample_buf); devc->sample_buf = NULL; | |
828 | ||
829 | return SR_OK; | |
830 | } | |
831 | ||
832 | static struct sr_dev_driver hantek_6xxx_driver_info = { | |
833 | .name = "hantek-6xxx", | |
834 | .longname = "Hantek 6xxx", | |
835 | .api_version = 1, | |
836 | .init = std_init, | |
837 | .cleanup = std_cleanup, | |
838 | .scan = scan, | |
839 | .dev_list = std_dev_list, | |
840 | .dev_clear = dev_clear, | |
841 | .config_get = config_get, | |
842 | .config_set = config_set, | |
843 | .config_list = config_list, | |
844 | .dev_open = dev_open, | |
845 | .dev_close = dev_close, | |
846 | .dev_acquisition_start = dev_acquisition_start, | |
847 | .dev_acquisition_stop = dev_acquisition_stop, | |
848 | .context = NULL, | |
849 | }; | |
850 | SR_REGISTER_DEV_DRIVER(hantek_6xxx_driver_info); |