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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 | /* Windows: "Hantek6022BE DRIVER 1": 04b4:6022 */ | |
65 | 0x04b4, 0x6022, 0x1d50, 0x608e, 0x0001, | |
66 | "Hantek", "6022BE", "fx2lafw-hantek-6022be.fw", | |
67 | ARRAY_AND_SIZE(dc_coupling), FALSE, | |
68 | }, | |
69 | { | |
70 | /* Windows: "Hantek6022BE DRIVER 2": 04b5:6022 */ | |
71 | 0x04b5, 0x6022, 0x1d50, 0x608e, 0x0001, | |
72 | "Hantek", "6022BE", "fx2lafw-hantek-6022be.fw", | |
73 | ARRAY_AND_SIZE(dc_coupling), FALSE, | |
74 | }, | |
75 | { | |
76 | 0x8102, 0x8102, 0x1d50, 0x608e, 0x0002, | |
77 | "Sainsmart", "DDS120", "fx2lafw-sainsmart-dds120.fw", | |
78 | ARRAY_AND_SIZE(acdc_coupling), TRUE, | |
79 | }, | |
80 | { | |
81 | /* Windows: "Hantek6022BL DRIVER 1": 04b4:602a */ | |
82 | 0x04b4, 0x602a, 0x1d50, 0x608e, 0x0003, | |
83 | "Hantek", "6022BL", "fx2lafw-hantek-6022bl.fw", | |
84 | ARRAY_AND_SIZE(dc_coupling), FALSE, | |
85 | }, | |
86 | { | |
87 | /* Windows: "Hantek6022BL DRIVER 2": 04b5:602a */ | |
88 | 0x04b5, 0x602a, 0x1d50, 0x608e, 0x0003, | |
89 | "Hantek", "6022BL", "fx2lafw-hantek-6022bl.fw", | |
90 | ARRAY_AND_SIZE(dc_coupling), FALSE, | |
91 | }, | |
92 | { | |
93 | 0xd4a2, 0x5660, 0x1d50, 0x608e, 0x0004, | |
94 | "YiXingDianZi", "MDSO", "fx2lafw-yixingdianzi-mdso.fw", | |
95 | ARRAY_AND_SIZE(dc_coupling), FALSE, | |
96 | }, | |
97 | ALL_ZERO | |
98 | }; | |
99 | ||
100 | static const uint64_t samplerates[] = { | |
101 | SAMPLERATE_VALUES | |
102 | }; | |
103 | ||
104 | static const uint64_t vdivs[][2] = { | |
105 | VDIV_VALUES | |
106 | }; | |
107 | ||
108 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount); | |
109 | ||
110 | static struct sr_dev_inst *hantek_6xxx_dev_new(const struct hantek_6xxx_profile *prof) | |
111 | { | |
112 | struct sr_dev_inst *sdi; | |
113 | struct sr_channel *ch; | |
114 | struct sr_channel_group *cg; | |
115 | struct dev_context *devc; | |
116 | unsigned int i; | |
117 | ||
118 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
119 | sdi->status = SR_ST_INITIALIZING; | |
120 | sdi->vendor = g_strdup(prof->vendor); | |
121 | sdi->model = g_strdup(prof->model); | |
122 | ||
123 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) { | |
124 | ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]); | |
125 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
126 | cg->name = g_strdup(channel_names[i]); | |
127 | cg->channels = g_slist_append(cg->channels, ch); | |
128 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
129 | } | |
130 | ||
131 | devc = g_malloc0(sizeof(struct dev_context)); | |
132 | ||
133 | for (i = 0; i < NUM_CHANNELS; i++) { | |
134 | devc->ch_enabled[i] = TRUE; | |
135 | devc->voltage[i] = DEFAULT_VOLTAGE; | |
136 | devc->coupling[i] = DEFAULT_COUPLING; | |
137 | } | |
138 | devc->coupling_vals = prof->coupling_vals; | |
139 | devc->coupling_tab_size = prof->coupling_tab_size; | |
140 | devc->has_coupling = prof->has_coupling; | |
141 | ||
142 | devc->profile = prof; | |
143 | devc->dev_state = IDLE; | |
144 | devc->samplerate = DEFAULT_SAMPLERATE; | |
145 | ||
146 | sdi->priv = devc; | |
147 | ||
148 | return sdi; | |
149 | } | |
150 | ||
151 | static int configure_channels(const struct sr_dev_inst *sdi) | |
152 | { | |
153 | struct dev_context *devc; | |
154 | const GSList *l; | |
155 | int p; | |
156 | struct sr_channel *ch; | |
157 | devc = sdi->priv; | |
158 | ||
159 | g_slist_free(devc->enabled_channels); | |
160 | devc->enabled_channels = NULL; | |
161 | memset(devc->ch_enabled, 0, sizeof(devc->ch_enabled)); | |
162 | ||
163 | for (l = sdi->channels, p = 0; l; l = l->next, p++) { | |
164 | ch = l->data; | |
165 | if (p < NUM_CHANNELS) { | |
166 | devc->ch_enabled[p] = ch->enabled; | |
167 | devc->enabled_channels = g_slist_append(devc->enabled_channels, ch); | |
168 | } | |
169 | } | |
170 | ||
171 | return SR_OK; | |
172 | } | |
173 | ||
174 | static void clear_helper(struct dev_context *devc) | |
175 | { | |
176 | g_slist_free(devc->enabled_channels); | |
177 | } | |
178 | ||
179 | static int dev_clear(const struct sr_dev_driver *di) | |
180 | { | |
181 | return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper); | |
182 | } | |
183 | ||
184 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
185 | { | |
186 | struct drv_context *drvc; | |
187 | struct dev_context *devc; | |
188 | struct sr_dev_inst *sdi; | |
189 | struct sr_usb_dev_inst *usb; | |
190 | struct sr_config *src; | |
191 | const struct hantek_6xxx_profile *prof; | |
192 | GSList *l, *devices, *conn_devices; | |
193 | struct libusb_device_descriptor des; | |
194 | libusb_device **devlist; | |
195 | int i, j; | |
196 | const char *conn; | |
197 | char connection_id[64]; | |
198 | ||
199 | drvc = di->context; | |
200 | ||
201 | devices = 0; | |
202 | ||
203 | conn = NULL; | |
204 | for (l = options; l; l = l->next) { | |
205 | src = l->data; | |
206 | if (src->key == SR_CONF_CONN) { | |
207 | conn = g_variant_get_string(src->data, NULL); | |
208 | break; | |
209 | } | |
210 | } | |
211 | if (conn) | |
212 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn); | |
213 | else | |
214 | conn_devices = NULL; | |
215 | ||
216 | /* Find all Hantek 60xx devices and upload firmware to all of them. */ | |
217 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
218 | for (i = 0; devlist[i]; i++) { | |
219 | if (conn) { | |
220 | usb = NULL; | |
221 | for (l = conn_devices; l; l = l->next) { | |
222 | usb = l->data; | |
223 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
224 | && usb->address == libusb_get_device_address(devlist[i])) | |
225 | break; | |
226 | } | |
227 | if (!l) | |
228 | /* This device matched none of the ones that | |
229 | * matched the conn specification. */ | |
230 | continue; | |
231 | } | |
232 | ||
233 | libusb_get_device_descriptor(devlist[i], &des); | |
234 | ||
235 | if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0) | |
236 | continue; | |
237 | ||
238 | prof = NULL; | |
239 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
240 | if (des.idVendor == dev_profiles[j].orig_vid | |
241 | && des.idProduct == dev_profiles[j].orig_pid) { | |
242 | /* Device matches the pre-firmware profile. */ | |
243 | prof = &dev_profiles[j]; | |
244 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
245 | sdi = hantek_6xxx_dev_new(prof); | |
246 | sdi->connection_id = g_strdup(connection_id); | |
247 | devices = g_slist_append(devices, sdi); | |
248 | devc = sdi->priv; | |
249 | if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i], | |
250 | USB_CONFIGURATION, prof->firmware) == SR_OK) { | |
251 | /* Remember when the firmware on this device was updated. */ | |
252 | devc->fw_updated = g_get_monotonic_time(); | |
253 | } else { | |
254 | sr_err("Firmware upload failed, name %s.", prof->firmware); | |
255 | } | |
256 | /* Dummy USB address of 0xff will get overwritten later. */ | |
257 | sdi->conn = sr_usb_dev_inst_new( | |
258 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
259 | break; | |
260 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
261 | && des.idProduct == dev_profiles[j].fw_pid | |
262 | && des.bcdDevice == dev_profiles[j].fw_prod_ver) { | |
263 | /* Device matches the post-firmware profile. */ | |
264 | prof = &dev_profiles[j]; | |
265 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
266 | sdi = hantek_6xxx_dev_new(prof); | |
267 | sdi->connection_id = g_strdup(connection_id); | |
268 | sdi->status = SR_ST_INACTIVE; | |
269 | devices = g_slist_append(devices, sdi); | |
270 | sdi->inst_type = SR_INST_USB; | |
271 | sdi->conn = sr_usb_dev_inst_new( | |
272 | libusb_get_bus_number(devlist[i]), | |
273 | libusb_get_device_address(devlist[i]), NULL); | |
274 | break; | |
275 | } | |
276 | } | |
277 | if (!prof) | |
278 | /* Not a supported VID/PID. */ | |
279 | continue; | |
280 | } | |
281 | libusb_free_device_list(devlist, 1); | |
282 | ||
283 | return std_scan_complete(di, devices); | |
284 | } | |
285 | ||
286 | static int dev_open(struct sr_dev_inst *sdi) | |
287 | { | |
288 | struct dev_context *devc; | |
289 | struct sr_usb_dev_inst *usb; | |
290 | int64_t timediff_us, timediff_ms; | |
291 | int err; | |
292 | ||
293 | devc = sdi->priv; | |
294 | usb = sdi->conn; | |
295 | ||
296 | /* | |
297 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
298 | * for the FX2 to renumerate. | |
299 | */ | |
300 | err = SR_ERR; | |
301 | if (devc->fw_updated > 0) { | |
302 | sr_info("Waiting for device to reset."); | |
303 | /* Takes >= 300ms for the FX2 to be gone from the USB bus. */ | |
304 | g_usleep(300 * 1000); | |
305 | timediff_ms = 0; | |
306 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
307 | if ((err = hantek_6xxx_open(sdi)) == SR_OK) | |
308 | break; | |
309 | g_usleep(100 * 1000); | |
310 | timediff_us = g_get_monotonic_time() - devc->fw_updated; | |
311 | timediff_ms = timediff_us / 1000; | |
312 | sr_spew("Waited %" PRIi64 " ms.", timediff_ms); | |
313 | } | |
314 | if (timediff_ms < MAX_RENUM_DELAY_MS) | |
315 | sr_info("Device came back after %"PRIu64" ms.", timediff_ms); | |
316 | } else { | |
317 | err = hantek_6xxx_open(sdi); | |
318 | } | |
319 | ||
320 | if (err != SR_OK) { | |
321 | sr_err("Unable to open device."); | |
322 | return SR_ERR; | |
323 | } | |
324 | ||
325 | err = libusb_claim_interface(usb->devhdl, USB_INTERFACE); | |
326 | if (err != 0) { | |
327 | sr_err("Unable to claim interface: %s.", | |
328 | libusb_error_name(err)); | |
329 | return SR_ERR; | |
330 | } | |
331 | ||
332 | return SR_OK; | |
333 | } | |
334 | ||
335 | static int dev_close(struct sr_dev_inst *sdi) | |
336 | { | |
337 | hantek_6xxx_close(sdi); | |
338 | ||
339 | return SR_OK; | |
340 | } | |
341 | ||
342 | static int config_get(uint32_t key, GVariant **data, | |
343 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
344 | { | |
345 | struct dev_context *devc; | |
346 | struct sr_usb_dev_inst *usb; | |
347 | const uint64_t *vdiv; | |
348 | int ch_idx; | |
349 | ||
350 | switch (key) { | |
351 | case SR_CONF_NUM_VDIV: | |
352 | *data = g_variant_new_int32(ARRAY_SIZE(vdivs)); | |
353 | break; | |
354 | } | |
355 | ||
356 | if (!sdi) | |
357 | return SR_ERR_ARG; | |
358 | ||
359 | devc = sdi->priv; | |
360 | if (!cg) { | |
361 | switch (key) { | |
362 | case SR_CONF_SAMPLERATE: | |
363 | *data = g_variant_new_uint64(devc->samplerate); | |
364 | break; | |
365 | case SR_CONF_LIMIT_MSEC: | |
366 | *data = g_variant_new_uint64(devc->limit_msec); | |
367 | break; | |
368 | case SR_CONF_LIMIT_SAMPLES: | |
369 | *data = g_variant_new_uint64(devc->limit_samples); | |
370 | break; | |
371 | case SR_CONF_CONN: | |
372 | if (!sdi->conn) | |
373 | return SR_ERR_ARG; | |
374 | usb = sdi->conn; | |
375 | if (usb->address == 255) | |
376 | /* Device still needs to re-enumerate after firmware | |
377 | * upload, so we don't know its (future) address. */ | |
378 | return SR_ERR; | |
379 | *data = g_variant_new_printf("%d.%d", usb->bus, usb->address); | |
380 | break; | |
381 | default: | |
382 | return SR_ERR_NA; | |
383 | } | |
384 | } else { | |
385 | if (sdi->channel_groups->data == cg) | |
386 | ch_idx = 0; | |
387 | else if (sdi->channel_groups->next->data == cg) | |
388 | ch_idx = 1; | |
389 | else | |
390 | return SR_ERR_ARG; | |
391 | switch (key) { | |
392 | case SR_CONF_VDIV: | |
393 | vdiv = vdivs[devc->voltage[ch_idx]]; | |
394 | *data = g_variant_new("(tt)", vdiv[0], vdiv[1]); | |
395 | break; | |
396 | case SR_CONF_COUPLING: | |
397 | *data = g_variant_new_string((devc->coupling[ch_idx] \ | |
398 | == COUPLING_DC) ? "DC" : "AC"); | |
399 | break; | |
400 | } | |
401 | } | |
402 | ||
403 | return SR_OK; | |
404 | } | |
405 | ||
406 | static int config_set(uint32_t key, GVariant *data, | |
407 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
408 | { | |
409 | struct dev_context *devc; | |
410 | int ch_idx, idx; | |
411 | ||
412 | devc = sdi->priv; | |
413 | if (!cg) { | |
414 | switch (key) { | |
415 | case SR_CONF_SAMPLERATE: | |
416 | devc->samplerate = g_variant_get_uint64(data); | |
417 | hantek_6xxx_update_samplerate(sdi); | |
418 | break; | |
419 | case SR_CONF_LIMIT_MSEC: | |
420 | devc->limit_msec = g_variant_get_uint64(data); | |
421 | break; | |
422 | case SR_CONF_LIMIT_SAMPLES: | |
423 | devc->limit_samples = g_variant_get_uint64(data); | |
424 | break; | |
425 | default: | |
426 | return SR_ERR_NA; | |
427 | } | |
428 | } else { | |
429 | if (sdi->channel_groups->data == cg) | |
430 | ch_idx = 0; | |
431 | else if (sdi->channel_groups->next->data == cg) | |
432 | ch_idx = 1; | |
433 | else | |
434 | return SR_ERR_ARG; | |
435 | switch (key) { | |
436 | case SR_CONF_VDIV: | |
437 | if ((idx = std_u64_tuple_idx(data, ARRAY_AND_SIZE(vdivs))) < 0) | |
438 | return SR_ERR_ARG; | |
439 | devc->voltage[ch_idx] = idx; | |
440 | hantek_6xxx_update_vdiv(sdi); | |
441 | break; | |
442 | case SR_CONF_COUPLING: | |
443 | if ((idx = std_str_idx(data, devc->coupling_vals, | |
444 | devc->coupling_tab_size)) < 0) | |
445 | return SR_ERR_ARG; | |
446 | devc->coupling[ch_idx] = idx; | |
447 | break; | |
448 | default: | |
449 | return SR_ERR_NA; | |
450 | } | |
451 | } | |
452 | ||
453 | return SR_OK; | |
454 | } | |
455 | ||
456 | static int config_list(uint32_t key, GVariant **data, | |
457 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
458 | { | |
459 | struct dev_context *devc; | |
460 | ||
461 | devc = (sdi) ? sdi->priv : NULL; | |
462 | ||
463 | if (!cg) { | |
464 | switch (key) { | |
465 | case SR_CONF_SCAN_OPTIONS: | |
466 | case SR_CONF_DEVICE_OPTIONS: | |
467 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
468 | case SR_CONF_SAMPLERATE: | |
469 | *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates)); | |
470 | break; | |
471 | default: | |
472 | return SR_ERR_NA; | |
473 | } | |
474 | } else { | |
475 | switch (key) { | |
476 | case SR_CONF_DEVICE_OPTIONS: | |
477 | *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg)); | |
478 | break; | |
479 | case SR_CONF_COUPLING: | |
480 | if (!devc) | |
481 | return SR_ERR_ARG; | |
482 | *data = g_variant_new_strv(devc->coupling_vals, devc->coupling_tab_size); | |
483 | break; | |
484 | case SR_CONF_VDIV: | |
485 | *data = std_gvar_tuple_array(ARRAY_AND_SIZE(vdivs)); | |
486 | break; | |
487 | default: | |
488 | return SR_ERR_NA; | |
489 | } | |
490 | } | |
491 | ||
492 | return SR_OK; | |
493 | } | |
494 | ||
495 | /* Minimise data amount for limit_samples and limit_msec limits. */ | |
496 | static uint32_t data_amount(const struct sr_dev_inst *sdi) | |
497 | { | |
498 | struct dev_context *devc = sdi->priv; | |
499 | uint32_t data_left, data_left_2, i; | |
500 | int32_t time_left; | |
501 | ||
502 | if (devc->limit_msec) { | |
503 | time_left = devc->limit_msec - (g_get_monotonic_time() - devc->aq_started) / 1000; | |
504 | data_left = devc->samplerate * MAX(time_left, 0) * NUM_CHANNELS / 1000; | |
505 | } else if (devc->limit_samples) { | |
506 | data_left = (devc->limit_samples - devc->samp_received) * NUM_CHANNELS; | |
507 | } else { | |
508 | data_left = devc->samplerate * NUM_CHANNELS; | |
509 | } | |
510 | ||
511 | /* Round up to nearest power of two. */ | |
512 | for (i = MIN_PACKET_SIZE; i < data_left; i *= 2) | |
513 | ; | |
514 | data_left_2 = i; | |
515 | ||
516 | sr_spew("data_amount: %u (rounded to power of 2: %u)", data_left, data_left_2); | |
517 | ||
518 | return data_left_2; | |
519 | } | |
520 | ||
521 | static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf, | |
522 | int num_samples) | |
523 | { | |
524 | struct sr_datafeed_packet packet; | |
525 | struct sr_datafeed_analog analog; | |
526 | struct sr_analog_encoding encoding; | |
527 | struct sr_analog_meaning meaning; | |
528 | struct sr_analog_spec spec; | |
529 | struct dev_context *devc = sdi->priv; | |
530 | GSList *channels = devc->enabled_channels; | |
531 | ||
532 | const float ch_bit[] = { RANGE(0) / 255, RANGE(1) / 255 }; | |
533 | const float ch_center[] = { RANGE(0) / 2, RANGE(1) / 2 }; | |
534 | ||
535 | sr_analog_init(&analog, &encoding, &meaning, &spec, 0); | |
536 | ||
537 | packet.type = SR_DF_ANALOG; | |
538 | packet.payload = &analog; | |
539 | ||
540 | analog.num_samples = num_samples; | |
541 | analog.meaning->mq = SR_MQ_VOLTAGE; | |
542 | analog.meaning->unit = SR_UNIT_VOLT; | |
543 | analog.meaning->mqflags = 0; | |
544 | ||
545 | analog.data = g_try_malloc(num_samples * sizeof(float)); | |
546 | if (!analog.data) { | |
547 | sr_err("Analog data buffer malloc failed."); | |
548 | devc->dev_state = STOPPING; | |
549 | return; | |
550 | } | |
551 | ||
552 | for (int ch = 0; ch < NUM_CHANNELS; ch++) { | |
553 | if (!devc->ch_enabled[ch]) | |
554 | continue; | |
555 | ||
556 | float vdivlog = log10f(ch_bit[ch]); | |
557 | int digits = -(int)vdivlog + (vdivlog < 0.0); | |
558 | analog.encoding->digits = digits; | |
559 | analog.spec->spec_digits = digits; | |
560 | analog.meaning->channels = g_slist_append(NULL, channels->data); | |
561 | ||
562 | for (int i = 0; i < num_samples; i++) { | |
563 | /* | |
564 | * The device always sends data for both channels. If a channel | |
565 | * is disabled, it contains a copy of the enabled channel's | |
566 | * data. However, we only send the requested channels to | |
567 | * the bus. | |
568 | * | |
569 | * Voltage values are encoded as a value 0-255, where the | |
570 | * value is a point in the range represented by the vdiv | |
571 | * setting. There are 10 vertical divs, so e.g. 500mV/div | |
572 | * represents 5V peak-to-peak where 0 = -2.5V and 255 = +2.5V. | |
573 | */ | |
574 | ((float *)analog.data)[i] = ch_bit[ch] * *(buf + i * 2 + ch) - ch_center[ch]; | |
575 | } | |
576 | ||
577 | sr_session_send(sdi, &packet); | |
578 | g_slist_free(analog.meaning->channels); | |
579 | ||
580 | channels = channels->next; | |
581 | } | |
582 | g_free(analog.data); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
587 | * Only channel data comes in asynchronously, and all transfers for this are | |
588 | * queued up beforehand, so this just needs to chuck the incoming data onto | |
589 | * the libsigrok session bus. | |
590 | */ | |
591 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
592 | { | |
593 | struct sr_dev_inst *sdi; | |
594 | struct dev_context *devc; | |
595 | ||
596 | sdi = transfer->user_data; | |
597 | devc = sdi->priv; | |
598 | ||
599 | if (devc->dev_state == FLUSH) { | |
600 | g_free(transfer->buffer); | |
601 | libusb_free_transfer(transfer); | |
602 | devc->dev_state = CAPTURE; | |
603 | devc->aq_started = g_get_monotonic_time(); | |
604 | read_channel(sdi, data_amount(sdi)); | |
605 | return; | |
606 | } | |
607 | ||
608 | if (devc->dev_state != CAPTURE) | |
609 | return; | |
610 | ||
611 | sr_spew("receive_transfer(): calculated samplerate == %" PRIu64 "ks/s", | |
612 | (uint64_t)(transfer->actual_length * 1000 / | |
613 | (g_get_monotonic_time() - devc->read_start_ts + 1) / | |
614 | NUM_CHANNELS)); | |
615 | ||
616 | sr_spew("receive_transfer(): status %s received %d bytes.", | |
617 | libusb_error_name(transfer->status), transfer->actual_length); | |
618 | ||
619 | if (transfer->actual_length == 0) | |
620 | /* Nothing to send to the bus. */ | |
621 | return; | |
622 | ||
623 | unsigned samples_received = transfer->actual_length / NUM_CHANNELS; | |
624 | send_chunk(sdi, transfer->buffer, samples_received); | |
625 | devc->samp_received += samples_received; | |
626 | ||
627 | g_free(transfer->buffer); | |
628 | libusb_free_transfer(transfer); | |
629 | ||
630 | if (devc->limit_samples && devc->samp_received >= devc->limit_samples) { | |
631 | sr_info("Requested number of samples reached, stopping. %" | |
632 | PRIu64 " <= %" PRIu64, devc->limit_samples, | |
633 | devc->samp_received); | |
634 | sr_dev_acquisition_stop(sdi); | |
635 | } else if (devc->limit_msec && (g_get_monotonic_time() - | |
636 | devc->aq_started) / 1000 >= devc->limit_msec) { | |
637 | sr_info("Requested time limit reached, stopping. %d <= %d", | |
638 | (uint32_t)devc->limit_msec, | |
639 | (uint32_t)(g_get_monotonic_time() - devc->aq_started) / 1000); | |
640 | sr_dev_acquisition_stop(sdi); | |
641 | } else { | |
642 | read_channel(sdi, data_amount(sdi)); | |
643 | } | |
644 | } | |
645 | ||
646 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount) | |
647 | { | |
648 | int ret; | |
649 | struct dev_context *devc; | |
650 | ||
651 | devc = sdi->priv; | |
652 | ||
653 | amount = MIN(amount, MAX_PACKET_SIZE); | |
654 | ret = hantek_6xxx_get_channeldata(sdi, receive_transfer, amount); | |
655 | devc->read_start_ts = g_get_monotonic_time(); | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
660 | static int handle_event(int fd, int revents, void *cb_data) | |
661 | { | |
662 | const struct sr_dev_inst *sdi; | |
663 | struct timeval tv; | |
664 | struct sr_dev_driver *di; | |
665 | struct dev_context *devc; | |
666 | struct drv_context *drvc; | |
667 | ||
668 | (void)fd; | |
669 | (void)revents; | |
670 | ||
671 | sdi = cb_data; | |
672 | di = sdi->driver; | |
673 | drvc = di->context; | |
674 | devc = sdi->priv; | |
675 | ||
676 | /* Always handle pending libusb events. */ | |
677 | tv.tv_sec = tv.tv_usec = 0; | |
678 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
679 | ||
680 | if (devc->dev_state == STOPPING) { | |
681 | /* We've been told to wind up the acquisition. */ | |
682 | sr_dbg("Stopping acquisition."); | |
683 | ||
684 | hantek_6xxx_stop_data_collecting(sdi); | |
685 | /* | |
686 | * TODO: Doesn't really cancel pending transfers so they might | |
687 | * come in after SR_DF_END is sent. | |
688 | */ | |
689 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
690 | ||
691 | std_session_send_df_end(sdi); | |
692 | ||
693 | devc->dev_state = IDLE; | |
694 | ||
695 | return TRUE; | |
696 | } | |
697 | ||
698 | return TRUE; | |
699 | } | |
700 | ||
701 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
702 | { | |
703 | struct dev_context *devc; | |
704 | struct sr_dev_driver *di = sdi->driver; | |
705 | struct drv_context *drvc = di->context; | |
706 | ||
707 | devc = sdi->priv; | |
708 | ||
709 | if (configure_channels(sdi) != SR_OK) { | |
710 | sr_err("Failed to configure channels."); | |
711 | return SR_ERR; | |
712 | } | |
713 | ||
714 | if (hantek_6xxx_init(sdi) != SR_OK) | |
715 | return SR_ERR; | |
716 | ||
717 | std_session_send_df_header(sdi); | |
718 | ||
719 | devc->samp_received = 0; | |
720 | devc->dev_state = FLUSH; | |
721 | ||
722 | usb_source_add(sdi->session, drvc->sr_ctx, TICK, | |
723 | handle_event, (void *)sdi); | |
724 | ||
725 | hantek_6xxx_start_data_collecting(sdi); | |
726 | ||
727 | read_channel(sdi, FLUSH_PACKET_SIZE); | |
728 | ||
729 | return SR_OK; | |
730 | } | |
731 | ||
732 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
733 | { | |
734 | struct dev_context *devc; | |
735 | ||
736 | devc = sdi->priv; | |
737 | devc->dev_state = STOPPING; | |
738 | ||
739 | return SR_OK; | |
740 | } | |
741 | ||
742 | static struct sr_dev_driver hantek_6xxx_driver_info = { | |
743 | .name = "hantek-6xxx", | |
744 | .longname = "Hantek 6xxx", | |
745 | .api_version = 1, | |
746 | .init = std_init, | |
747 | .cleanup = std_cleanup, | |
748 | .scan = scan, | |
749 | .dev_list = std_dev_list, | |
750 | .dev_clear = dev_clear, | |
751 | .config_get = config_get, | |
752 | .config_set = config_set, | |
753 | .config_list = config_list, | |
754 | .dev_open = dev_open, | |
755 | .dev_close = dev_close, | |
756 | .dev_acquisition_start = dev_acquisition_start, | |
757 | .dev_acquisition_stop = dev_acquisition_stop, | |
758 | .context = NULL, | |
759 | }; | |
760 | SR_REGISTER_DEV_DRIVER(hantek_6xxx_driver_info); |