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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 | ARRAY_AND_SIZE(dc_coupling), FALSE, | |
67 | }, | |
68 | { | |
69 | 0x8102, 0x8102, 0x1d50, 0x608e, 0x0002, | |
70 | "Sainsmart", "DDS120", "fx2lafw-sainsmart-dds120.fw", | |
71 | ARRAY_AND_SIZE(acdc_coupling), TRUE, | |
72 | }, | |
73 | { | |
74 | 0x04b4, 0x602a, 0x1d50, 0x608e, 0x0003, | |
75 | "Hantek", "6022BL", "fx2lafw-hantek-6022bl.fw", | |
76 | ARRAY_AND_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 struct sr_dev_inst *hantek_6xxx_dev_new(const struct hantek_6xxx_profile *prof) | |
92 | { | |
93 | struct sr_dev_inst *sdi; | |
94 | struct sr_channel *ch; | |
95 | struct sr_channel_group *cg; | |
96 | struct dev_context *devc; | |
97 | unsigned int i; | |
98 | ||
99 | sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
100 | sdi->status = SR_ST_INITIALIZING; | |
101 | sdi->vendor = g_strdup(prof->vendor); | |
102 | sdi->model = g_strdup(prof->model); | |
103 | ||
104 | for (i = 0; i < ARRAY_SIZE(channel_names); i++) { | |
105 | ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]); | |
106 | cg = g_malloc0(sizeof(struct sr_channel_group)); | |
107 | cg->name = g_strdup(channel_names[i]); | |
108 | cg->channels = g_slist_append(cg->channels, ch); | |
109 | sdi->channel_groups = g_slist_append(sdi->channel_groups, cg); | |
110 | } | |
111 | ||
112 | devc = g_malloc0(sizeof(struct dev_context)); | |
113 | ||
114 | for (i = 0; i < NUM_CHANNELS; i++) { | |
115 | devc->ch_enabled[i] = TRUE; | |
116 | devc->voltage[i] = DEFAULT_VOLTAGE; | |
117 | devc->coupling[i] = DEFAULT_COUPLING; | |
118 | } | |
119 | devc->coupling_vals = prof->coupling_vals; | |
120 | devc->coupling_tab_size = prof->coupling_tab_size; | |
121 | devc->has_coupling = prof->has_coupling; | |
122 | ||
123 | devc->sample_buf = NULL; | |
124 | devc->sample_buf_write = 0; | |
125 | devc->sample_buf_size = 0; | |
126 | ||
127 | devc->profile = prof; | |
128 | devc->dev_state = IDLE; | |
129 | devc->samplerate = DEFAULT_SAMPLERATE; | |
130 | ||
131 | sdi->priv = devc; | |
132 | ||
133 | return sdi; | |
134 | } | |
135 | ||
136 | static int configure_channels(const struct sr_dev_inst *sdi) | |
137 | { | |
138 | struct dev_context *devc; | |
139 | const GSList *l; | |
140 | int p; | |
141 | struct sr_channel *ch; | |
142 | devc = sdi->priv; | |
143 | ||
144 | g_slist_free(devc->enabled_channels); | |
145 | devc->enabled_channels = NULL; | |
146 | memset(devc->ch_enabled, 0, sizeof(devc->ch_enabled)); | |
147 | ||
148 | for (l = sdi->channels, p = 0; l; l = l->next, p++) { | |
149 | ch = l->data; | |
150 | if (p < NUM_CHANNELS) { | |
151 | devc->ch_enabled[p] = ch->enabled; | |
152 | devc->enabled_channels = g_slist_append(devc->enabled_channels, ch); | |
153 | } | |
154 | } | |
155 | ||
156 | return SR_OK; | |
157 | } | |
158 | ||
159 | static void clear_helper(struct dev_context *devc) | |
160 | { | |
161 | g_slist_free(devc->enabled_channels); | |
162 | } | |
163 | ||
164 | static int dev_clear(const struct sr_dev_driver *di) | |
165 | { | |
166 | return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper); | |
167 | } | |
168 | ||
169 | static GSList *scan(struct sr_dev_driver *di, GSList *options) | |
170 | { | |
171 | struct drv_context *drvc; | |
172 | struct dev_context *devc; | |
173 | struct sr_dev_inst *sdi; | |
174 | struct sr_usb_dev_inst *usb; | |
175 | struct sr_config *src; | |
176 | const struct hantek_6xxx_profile *prof; | |
177 | GSList *l, *devices, *conn_devices; | |
178 | struct libusb_device_descriptor des; | |
179 | libusb_device **devlist; | |
180 | int i, j; | |
181 | const char *conn; | |
182 | char connection_id[64]; | |
183 | ||
184 | drvc = di->context; | |
185 | ||
186 | devices = 0; | |
187 | ||
188 | conn = NULL; | |
189 | for (l = options; l; l = l->next) { | |
190 | src = l->data; | |
191 | if (src->key == SR_CONF_CONN) { | |
192 | conn = g_variant_get_string(src->data, NULL); | |
193 | break; | |
194 | } | |
195 | } | |
196 | if (conn) | |
197 | conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn); | |
198 | else | |
199 | conn_devices = NULL; | |
200 | ||
201 | /* Find all Hantek 60xx devices and upload firmware to all of them. */ | |
202 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
203 | for (i = 0; devlist[i]; i++) { | |
204 | if (conn) { | |
205 | usb = NULL; | |
206 | for (l = conn_devices; l; l = l->next) { | |
207 | usb = l->data; | |
208 | if (usb->bus == libusb_get_bus_number(devlist[i]) | |
209 | && usb->address == libusb_get_device_address(devlist[i])) | |
210 | break; | |
211 | } | |
212 | if (!l) | |
213 | /* This device matched none of the ones that | |
214 | * matched the conn specification. */ | |
215 | continue; | |
216 | } | |
217 | ||
218 | libusb_get_device_descriptor(devlist[i], &des); | |
219 | ||
220 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
221 | ||
222 | prof = NULL; | |
223 | for (j = 0; dev_profiles[j].orig_vid; j++) { | |
224 | if (des.idVendor == dev_profiles[j].orig_vid | |
225 | && des.idProduct == dev_profiles[j].orig_pid) { | |
226 | /* Device matches the pre-firmware profile. */ | |
227 | prof = &dev_profiles[j]; | |
228 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
229 | sdi = hantek_6xxx_dev_new(prof); | |
230 | sdi->connection_id = g_strdup(connection_id); | |
231 | devices = g_slist_append(devices, sdi); | |
232 | devc = sdi->priv; | |
233 | if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i], | |
234 | USB_CONFIGURATION, prof->firmware) == SR_OK) | |
235 | /* Remember when the firmware on this device was updated. */ | |
236 | devc->fw_updated = g_get_monotonic_time(); | |
237 | else | |
238 | sr_err("Firmware upload failed."); | |
239 | /* Dummy USB address of 0xff will get overwritten later. */ | |
240 | sdi->conn = sr_usb_dev_inst_new( | |
241 | libusb_get_bus_number(devlist[i]), 0xff, NULL); | |
242 | break; | |
243 | } else if (des.idVendor == dev_profiles[j].fw_vid | |
244 | && des.idProduct == dev_profiles[j].fw_pid | |
245 | && des.bcdDevice == dev_profiles[j].fw_prod_ver) { | |
246 | /* Device matches the post-firmware profile. */ | |
247 | prof = &dev_profiles[j]; | |
248 | sr_dbg("Found a %s %s.", prof->vendor, prof->model); | |
249 | sdi = hantek_6xxx_dev_new(prof); | |
250 | sdi->connection_id = g_strdup(connection_id); | |
251 | sdi->status = SR_ST_INACTIVE; | |
252 | devices = g_slist_append(devices, sdi); | |
253 | sdi->inst_type = SR_INST_USB; | |
254 | sdi->conn = sr_usb_dev_inst_new( | |
255 | libusb_get_bus_number(devlist[i]), | |
256 | libusb_get_device_address(devlist[i]), NULL); | |
257 | break; | |
258 | } | |
259 | } | |
260 | if (!prof) | |
261 | /* Not a supported VID/PID. */ | |
262 | continue; | |
263 | } | |
264 | libusb_free_device_list(devlist, 1); | |
265 | ||
266 | return std_scan_complete(di, devices); | |
267 | } | |
268 | ||
269 | static int dev_open(struct sr_dev_inst *sdi) | |
270 | { | |
271 | struct dev_context *devc; | |
272 | struct sr_usb_dev_inst *usb; | |
273 | int64_t timediff_us, timediff_ms; | |
274 | int err; | |
275 | ||
276 | devc = sdi->priv; | |
277 | usb = sdi->conn; | |
278 | ||
279 | /* | |
280 | * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS | |
281 | * for the FX2 to renumerate. | |
282 | */ | |
283 | err = SR_ERR; | |
284 | if (devc->fw_updated > 0) { | |
285 | sr_info("Waiting for device to reset."); | |
286 | /* Takes >= 300ms for the FX2 to be gone from the USB bus. */ | |
287 | g_usleep(300 * 1000); | |
288 | timediff_ms = 0; | |
289 | while (timediff_ms < MAX_RENUM_DELAY_MS) { | |
290 | if ((err = hantek_6xxx_open(sdi)) == SR_OK) | |
291 | break; | |
292 | g_usleep(100 * 1000); | |
293 | timediff_us = g_get_monotonic_time() - devc->fw_updated; | |
294 | timediff_ms = timediff_us / 1000; | |
295 | sr_spew("Waited %" PRIi64 " ms.", timediff_ms); | |
296 | } | |
297 | if (timediff_ms < MAX_RENUM_DELAY_MS) | |
298 | sr_info("Device came back after %"PRIu64" ms.", timediff_ms); | |
299 | } else { | |
300 | err = hantek_6xxx_open(sdi); | |
301 | } | |
302 | ||
303 | if (err != SR_OK) { | |
304 | sr_err("Unable to open device."); | |
305 | return SR_ERR; | |
306 | } | |
307 | ||
308 | err = libusb_claim_interface(usb->devhdl, USB_INTERFACE); | |
309 | if (err != 0) { | |
310 | sr_err("Unable to claim interface: %s.", | |
311 | libusb_error_name(err)); | |
312 | return SR_ERR; | |
313 | } | |
314 | ||
315 | return SR_OK; | |
316 | } | |
317 | ||
318 | static int dev_close(struct sr_dev_inst *sdi) | |
319 | { | |
320 | hantek_6xxx_close(sdi); | |
321 | ||
322 | return SR_OK; | |
323 | } | |
324 | ||
325 | static int config_get(uint32_t key, GVariant **data, | |
326 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
327 | { | |
328 | struct dev_context *devc; | |
329 | struct sr_usb_dev_inst *usb; | |
330 | char str[128]; | |
331 | const uint64_t *vdiv; | |
332 | int ch_idx; | |
333 | ||
334 | switch (key) { | |
335 | case SR_CONF_NUM_VDIV: | |
336 | *data = g_variant_new_int32(ARRAY_SIZE(vdivs)); | |
337 | break; | |
338 | } | |
339 | ||
340 | if (!sdi) | |
341 | return SR_ERR_ARG; | |
342 | ||
343 | devc = sdi->priv; | |
344 | if (!cg) { | |
345 | switch (key) { | |
346 | case SR_CONF_SAMPLERATE: | |
347 | *data = g_variant_new_uint64(devc->samplerate); | |
348 | break; | |
349 | case SR_CONF_LIMIT_MSEC: | |
350 | *data = g_variant_new_uint64(devc->limit_msec); | |
351 | break; | |
352 | case SR_CONF_LIMIT_SAMPLES: | |
353 | *data = g_variant_new_uint64(devc->limit_samples); | |
354 | break; | |
355 | case SR_CONF_CONN: | |
356 | if (!sdi->conn) | |
357 | return SR_ERR_ARG; | |
358 | usb = sdi->conn; | |
359 | if (usb->address == 255) | |
360 | /* Device still needs to re-enumerate after firmware | |
361 | * upload, so we don't know its (future) address. */ | |
362 | return SR_ERR; | |
363 | snprintf(str, 128, "%d.%d", usb->bus, usb->address); | |
364 | *data = g_variant_new_string(str); | |
365 | break; | |
366 | default: | |
367 | return SR_ERR_NA; | |
368 | } | |
369 | } else { | |
370 | if (sdi->channel_groups->data == cg) | |
371 | ch_idx = 0; | |
372 | else if (sdi->channel_groups->next->data == cg) | |
373 | ch_idx = 1; | |
374 | else | |
375 | return SR_ERR_ARG; | |
376 | switch (key) { | |
377 | case SR_CONF_VDIV: | |
378 | vdiv = vdivs[devc->voltage[ch_idx]]; | |
379 | *data = g_variant_new("(tt)", vdiv[0], vdiv[1]); | |
380 | break; | |
381 | case SR_CONF_COUPLING: | |
382 | *data = g_variant_new_string((devc->coupling[ch_idx] \ | |
383 | == COUPLING_DC) ? "DC" : "AC"); | |
384 | break; | |
385 | } | |
386 | } | |
387 | ||
388 | return SR_OK; | |
389 | } | |
390 | ||
391 | static int config_set(uint32_t key, GVariant *data, | |
392 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
393 | { | |
394 | struct dev_context *devc; | |
395 | uint64_t p, q; | |
396 | int tmp_int, ch_idx; | |
397 | unsigned int i; | |
398 | const char *tmp_str; | |
399 | ||
400 | devc = sdi->priv; | |
401 | if (!cg) { | |
402 | switch (key) { | |
403 | case SR_CONF_SAMPLERATE: | |
404 | devc->samplerate = g_variant_get_uint64(data); | |
405 | hantek_6xxx_update_samplerate(sdi); | |
406 | break; | |
407 | case SR_CONF_LIMIT_MSEC: | |
408 | devc->limit_msec = g_variant_get_uint64(data); | |
409 | break; | |
410 | case SR_CONF_LIMIT_SAMPLES: | |
411 | devc->limit_samples = g_variant_get_uint64(data); | |
412 | break; | |
413 | default: | |
414 | return SR_ERR_NA; | |
415 | } | |
416 | } else { | |
417 | if (sdi->channel_groups->data == cg) | |
418 | ch_idx = 0; | |
419 | else if (sdi->channel_groups->next->data == cg) | |
420 | ch_idx = 1; | |
421 | else | |
422 | return SR_ERR_ARG; | |
423 | switch (key) { | |
424 | case SR_CONF_VDIV: | |
425 | g_variant_get(data, "(tt)", &p, &q); | |
426 | tmp_int = -1; | |
427 | for (i = 0; i < ARRAY_SIZE(vdivs); i++) { | |
428 | if (vdivs[i][0] == p && vdivs[i][1] == q) { | |
429 | tmp_int = i; | |
430 | break; | |
431 | } | |
432 | } | |
433 | if (tmp_int >= 0) { | |
434 | devc->voltage[ch_idx] = tmp_int; | |
435 | hantek_6xxx_update_vdiv(sdi); | |
436 | } else | |
437 | return SR_ERR_ARG; | |
438 | break; | |
439 | case SR_CONF_COUPLING: | |
440 | tmp_str = g_variant_get_string(data, NULL); | |
441 | for (i = 0; i < devc->coupling_tab_size; i++) { | |
442 | if (!strcmp(tmp_str, devc->coupling_vals[i])) { | |
443 | devc->coupling[ch_idx] = i; | |
444 | break; | |
445 | } | |
446 | } | |
447 | if (i == devc->coupling_tab_size) | |
448 | return SR_ERR_ARG; | |
449 | break; | |
450 | default: | |
451 | return SR_ERR_NA; | |
452 | } | |
453 | } | |
454 | ||
455 | return SR_OK; | |
456 | } | |
457 | ||
458 | static int config_list(uint32_t key, GVariant **data, | |
459 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) | |
460 | { | |
461 | struct dev_context *devc; | |
462 | ||
463 | devc = (sdi) ? sdi->priv : NULL; | |
464 | ||
465 | if (!cg) { | |
466 | switch (key) { | |
467 | case SR_CONF_SCAN_OPTIONS: | |
468 | case SR_CONF_DEVICE_OPTIONS: | |
469 | return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts); | |
470 | case SR_CONF_SAMPLERATE: | |
471 | *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates)); | |
472 | break; | |
473 | default: | |
474 | return SR_ERR_NA; | |
475 | } | |
476 | } else { | |
477 | switch (key) { | |
478 | case SR_CONF_DEVICE_OPTIONS: | |
479 | *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg)); | |
480 | break; | |
481 | case SR_CONF_COUPLING: | |
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 < 2; 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 | static void send_data(struct sr_dev_inst *sdi, struct libusb_transfer *buf[], uint64_t samples) | |
586 | { | |
587 | int i = 0; | |
588 | uint64_t send = 0; | |
589 | uint32_t chunk; | |
590 | ||
591 | while (send < samples) { | |
592 | chunk = MIN(samples - send, (uint64_t)(buf[i]->actual_length / NUM_CHANNELS)); | |
593 | send += chunk; | |
594 | send_chunk(sdi, buf[i]->buffer, chunk); | |
595 | ||
596 | /* | |
597 | * Everything in this transfer was either copied to the buffer | |
598 | * or sent to the session bus. | |
599 | */ | |
600 | g_free(buf[i]->buffer); | |
601 | libusb_free_transfer(buf[i]); | |
602 | i++; | |
603 | } | |
604 | } | |
605 | ||
606 | /* | |
607 | * Called by libusb (as triggered by handle_event()) when a transfer comes in. | |
608 | * Only channel data comes in asynchronously, and all transfers for this are | |
609 | * queued up beforehand, so this just needs to chuck the incoming data onto | |
610 | * the libsigrok session bus. | |
611 | */ | |
612 | static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer) | |
613 | { | |
614 | struct sr_dev_inst *sdi; | |
615 | struct dev_context *devc; | |
616 | ||
617 | sdi = transfer->user_data; | |
618 | devc = sdi->priv; | |
619 | ||
620 | if (devc->dev_state == FLUSH) { | |
621 | g_free(transfer->buffer); | |
622 | libusb_free_transfer(transfer); | |
623 | devc->dev_state = CAPTURE; | |
624 | devc->aq_started = g_get_monotonic_time(); | |
625 | read_channel(sdi, data_amount(sdi)); | |
626 | return; | |
627 | } | |
628 | ||
629 | if (devc->dev_state != CAPTURE) | |
630 | return; | |
631 | ||
632 | if (!devc->sample_buf) { | |
633 | devc->sample_buf_size = 10; | |
634 | devc->sample_buf = g_try_malloc(devc->sample_buf_size * sizeof(transfer)); | |
635 | devc->sample_buf_write = 0; | |
636 | } | |
637 | ||
638 | if (devc->sample_buf_write >= devc->sample_buf_size) { | |
639 | devc->sample_buf_size += 10; | |
640 | devc->sample_buf = g_try_realloc(devc->sample_buf, | |
641 | devc->sample_buf_size * sizeof(transfer)); | |
642 | if (!devc->sample_buf) { | |
643 | sr_err("Sample buffer malloc failed."); | |
644 | devc->dev_state = STOPPING; | |
645 | return; | |
646 | } | |
647 | } | |
648 | ||
649 | devc->sample_buf[devc->sample_buf_write++] = transfer; | |
650 | devc->samp_received += transfer->actual_length / NUM_CHANNELS; | |
651 | ||
652 | sr_spew("receive_transfer(): calculated samplerate == %" PRIu64 "ks/s", | |
653 | (uint64_t)(transfer->actual_length * 1000 / | |
654 | (g_get_monotonic_time() - devc->read_start_ts + 1) / | |
655 | NUM_CHANNELS)); | |
656 | ||
657 | sr_spew("receive_transfer(): status %s received %d bytes.", | |
658 | libusb_error_name(transfer->status), transfer->actual_length); | |
659 | ||
660 | if (transfer->actual_length == 0) | |
661 | /* Nothing to send to the bus. */ | |
662 | return; | |
663 | ||
664 | if (devc->limit_samples && devc->samp_received >= devc->limit_samples) { | |
665 | sr_info("Requested number of samples reached, stopping. %" | |
666 | PRIu64 " <= %" PRIu64, devc->limit_samples, | |
667 | devc->samp_received); | |
668 | send_data(sdi, devc->sample_buf, devc->limit_samples); | |
669 | sr_dev_acquisition_stop(sdi); | |
670 | } else if (devc->limit_msec && (g_get_monotonic_time() - | |
671 | devc->aq_started) / 1000 >= devc->limit_msec) { | |
672 | sr_info("Requested time limit reached, stopping. %d <= %d", | |
673 | (uint32_t)devc->limit_msec, | |
674 | (uint32_t)(g_get_monotonic_time() - devc->aq_started) / 1000); | |
675 | send_data(sdi, devc->sample_buf, devc->samp_received); | |
676 | g_free(devc->sample_buf); | |
677 | devc->sample_buf = NULL; | |
678 | sr_dev_acquisition_stop(sdi); | |
679 | } else { | |
680 | read_channel(sdi, data_amount(sdi)); | |
681 | } | |
682 | } | |
683 | ||
684 | static int read_channel(const struct sr_dev_inst *sdi, uint32_t amount) | |
685 | { | |
686 | int ret; | |
687 | struct dev_context *devc; | |
688 | ||
689 | devc = sdi->priv; | |
690 | ||
691 | amount = MIN(amount, MAX_PACKET_SIZE); | |
692 | ret = hantek_6xxx_get_channeldata(sdi, receive_transfer, amount); | |
693 | devc->read_start_ts = g_get_monotonic_time(); | |
694 | devc->read_data_amount = amount; | |
695 | ||
696 | return ret; | |
697 | } | |
698 | ||
699 | static int handle_event(int fd, int revents, void *cb_data) | |
700 | { | |
701 | const struct sr_dev_inst *sdi; | |
702 | struct timeval tv; | |
703 | struct sr_dev_driver *di; | |
704 | struct dev_context *devc; | |
705 | struct drv_context *drvc; | |
706 | ||
707 | (void)fd; | |
708 | (void)revents; | |
709 | ||
710 | sdi = cb_data; | |
711 | di = sdi->driver; | |
712 | drvc = di->context; | |
713 | devc = sdi->priv; | |
714 | ||
715 | /* Always handle pending libusb events. */ | |
716 | tv.tv_sec = tv.tv_usec = 0; | |
717 | libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); | |
718 | ||
719 | if (devc->dev_state == STOPPING) { | |
720 | /* We've been told to wind up the acquisition. */ | |
721 | sr_dbg("Stopping acquisition."); | |
722 | ||
723 | hantek_6xxx_stop_data_collecting(sdi); | |
724 | /* | |
725 | * TODO: Doesn't really cancel pending transfers so they might | |
726 | * come in after SR_DF_END is sent. | |
727 | */ | |
728 | usb_source_remove(sdi->session, drvc->sr_ctx); | |
729 | ||
730 | std_session_send_df_end(sdi); | |
731 | ||
732 | devc->dev_state = IDLE; | |
733 | ||
734 | return TRUE; | |
735 | } | |
736 | ||
737 | return TRUE; | |
738 | } | |
739 | ||
740 | static int dev_acquisition_start(const struct sr_dev_inst *sdi) | |
741 | { | |
742 | struct dev_context *devc; | |
743 | struct sr_dev_driver *di = sdi->driver; | |
744 | struct drv_context *drvc = di->context; | |
745 | ||
746 | devc = sdi->priv; | |
747 | ||
748 | if (configure_channels(sdi) != SR_OK) { | |
749 | sr_err("Failed to configure channels."); | |
750 | return SR_ERR; | |
751 | } | |
752 | ||
753 | if (hantek_6xxx_init(sdi) != SR_OK) | |
754 | return SR_ERR; | |
755 | ||
756 | std_session_send_df_header(sdi); | |
757 | ||
758 | devc->samp_received = 0; | |
759 | devc->dev_state = FLUSH; | |
760 | ||
761 | usb_source_add(sdi->session, drvc->sr_ctx, TICK, | |
762 | handle_event, (void *)sdi); | |
763 | ||
764 | hantek_6xxx_start_data_collecting(sdi); | |
765 | ||
766 | read_channel(sdi, FLUSH_PACKET_SIZE); | |
767 | ||
768 | return SR_OK; | |
769 | } | |
770 | ||
771 | static int dev_acquisition_stop(struct sr_dev_inst *sdi) | |
772 | { | |
773 | struct dev_context *devc; | |
774 | ||
775 | devc = sdi->priv; | |
776 | devc->dev_state = STOPPING; | |
777 | ||
778 | g_free(devc->sample_buf); | |
779 | devc->sample_buf = NULL; | |
780 | ||
781 | return SR_OK; | |
782 | } | |
783 | ||
784 | static struct sr_dev_driver hantek_6xxx_driver_info = { | |
785 | .name = "hantek-6xxx", | |
786 | .longname = "Hantek 6xxx", | |
787 | .api_version = 1, | |
788 | .init = std_init, | |
789 | .cleanup = std_cleanup, | |
790 | .scan = scan, | |
791 | .dev_list = std_dev_list, | |
792 | .dev_clear = dev_clear, | |
793 | .config_get = config_get, | |
794 | .config_set = config_set, | |
795 | .config_list = config_list, | |
796 | .dev_open = dev_open, | |
797 | .dev_close = dev_close, | |
798 | .dev_acquisition_start = dev_acquisition_start, | |
799 | .dev_acquisition_stop = dev_acquisition_stop, | |
800 | .context = NULL, | |
801 | }; | |
802 | SR_REGISTER_DEV_DRIVER(hantek_6xxx_driver_info); |