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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
5 | * With protocol information from the hantekdso project, | |
6 | * Copyright (C) 2008 Oleg Khudyakov <prcoder@gmail.com> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include "libsigrok.h" | |
23 | #include "libsigrok-internal.h" | |
24 | #include "dso.h" | |
25 | #include <string.h> | |
26 | #include <glib.h> | |
27 | #include <libusb.h> | |
28 | ||
29 | extern struct sr_dev_driver hantek_dso_driver_info; | |
30 | ||
31 | static int send_begin(const struct sr_dev_inst *sdi) | |
32 | { | |
33 | struct sr_usb_dev_inst *usb; | |
34 | int ret; | |
35 | unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe, | |
36 | 0x00, 0x01, 0x00}; | |
37 | ||
38 | sr_dbg("Sending CTRL_BEGINCOMMAND."); | |
39 | ||
40 | usb = sdi->conn; | |
41 | if ((ret = libusb_control_transfer(usb->devhdl, | |
42 | LIBUSB_REQUEST_TYPE_VENDOR, CTRL_BEGINCOMMAND, | |
43 | 0, 0, buffer, sizeof(buffer), 200)) != sizeof(buffer)) { | |
44 | sr_err("Failed to send begincommand: %s.", | |
45 | libusb_error_name(ret)); | |
46 | return SR_ERR; | |
47 | } | |
48 | ||
49 | return SR_OK; | |
50 | } | |
51 | ||
52 | static int send_bulkcmd(const struct sr_dev_inst *sdi, uint8_t *cmdstring, int cmdlen) | |
53 | { | |
54 | struct sr_usb_dev_inst *usb; | |
55 | int ret, tmp; | |
56 | ||
57 | usb = sdi->conn; | |
58 | ||
59 | if (send_begin(sdi) != SR_OK) | |
60 | return SR_ERR; | |
61 | ||
62 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, cmdstring, | |
63 | cmdlen, &tmp, 200)) != 0) | |
64 | return SR_ERR; | |
65 | ||
66 | return SR_OK; | |
67 | } | |
68 | ||
69 | static int dso_getmps(libusb_device *dev) | |
70 | { | |
71 | struct libusb_device_descriptor des; | |
72 | struct libusb_config_descriptor *conf_dsc; | |
73 | const struct libusb_interface_descriptor *intf_dsc; | |
74 | int mps; | |
75 | ||
76 | if (libusb_get_device_descriptor(dev, &des) != 0) | |
77 | return 0; | |
78 | ||
79 | if (des.bNumConfigurations != 1) | |
80 | return 0; | |
81 | ||
82 | if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0) | |
83 | return 0; | |
84 | ||
85 | mps = 0; | |
86 | intf_dsc = &(conf_dsc->interface[0].altsetting[0]); | |
87 | if (intf_dsc->bNumEndpoints != 2) | |
88 | goto err; | |
89 | ||
90 | if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) != | |
91 | (2 | LIBUSB_ENDPOINT_OUT)) | |
92 | /* The first endpoint should be 2 (outbound). */ | |
93 | goto err; | |
94 | ||
95 | if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) != | |
96 | (6 | LIBUSB_ENDPOINT_IN)) | |
97 | /* The second endpoint should be 6 (inbound). */ | |
98 | goto err; | |
99 | ||
100 | mps = intf_dsc->endpoint[1].wMaxPacketSize; | |
101 | ||
102 | err: | |
103 | if (conf_dsc) | |
104 | libusb_free_config_descriptor(conf_dsc); | |
105 | ||
106 | return mps; | |
107 | } | |
108 | ||
109 | SR_PRIV int dso_open(struct sr_dev_inst *sdi) | |
110 | { | |
111 | struct dev_context *devc; | |
112 | struct drv_context *drvc = hantek_dso_driver_info.priv; | |
113 | struct sr_usb_dev_inst *usb; | |
114 | struct libusb_device_descriptor des; | |
115 | libusb_device **devlist; | |
116 | int err, skip, i; | |
117 | ||
118 | devc = sdi->priv; | |
119 | usb = sdi->conn; | |
120 | ||
121 | if (sdi->status == SR_ST_ACTIVE) | |
122 | /* already in use */ | |
123 | return SR_ERR; | |
124 | ||
125 | skip = 0; | |
126 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
127 | for (i = 0; devlist[i]; i++) { | |
128 | if ((err = libusb_get_device_descriptor(devlist[i], &des))) { | |
129 | sr_err("Failed to get device descriptor: %s.", | |
130 | libusb_error_name(err)); | |
131 | continue; | |
132 | } | |
133 | ||
134 | if (des.idVendor != devc->profile->fw_vid | |
135 | || des.idProduct != devc->profile->fw_pid) | |
136 | continue; | |
137 | ||
138 | if (sdi->status == SR_ST_INITIALIZING) { | |
139 | if (skip != sdi->index) { | |
140 | /* Skip devices of this type that aren't the one we want. */ | |
141 | skip += 1; | |
142 | continue; | |
143 | } | |
144 | } else if (sdi->status == SR_ST_INACTIVE) { | |
145 | /* | |
146 | * This device is fully enumerated, so we need to find | |
147 | * this device by vendor, product, bus and address. | |
148 | */ | |
149 | if (libusb_get_bus_number(devlist[i]) != usb->bus | |
150 | || libusb_get_device_address(devlist[i]) != usb->address) | |
151 | /* this is not the one */ | |
152 | continue; | |
153 | } | |
154 | ||
155 | if (!(err = libusb_open(devlist[i], &usb->devhdl))) { | |
156 | if (usb->address == 0xff) | |
157 | /* | |
158 | * first time we touch this device after firmware upload, | |
159 | * so we don't know the address yet. | |
160 | */ | |
161 | usb->address = libusb_get_device_address(devlist[i]); | |
162 | ||
163 | if (!(devc->epin_maxpacketsize = dso_getmps(devlist[i]))) | |
164 | sr_err("Wrong endpoint profile."); | |
165 | else { | |
166 | sdi->status = SR_ST_ACTIVE; | |
167 | sr_info("Opened device %d on %d.%d interface %d.", | |
168 | sdi->index, usb->bus, | |
169 | usb->address, USB_INTERFACE); | |
170 | } | |
171 | } else { | |
172 | sr_err("Failed to open device: %s.", | |
173 | libusb_error_name(err)); | |
174 | } | |
175 | ||
176 | /* If we made it here, we handled the device (somehow). */ | |
177 | break; | |
178 | } | |
179 | libusb_free_device_list(devlist, 1); | |
180 | ||
181 | if (sdi->status != SR_ST_ACTIVE) | |
182 | return SR_ERR; | |
183 | ||
184 | return SR_OK; | |
185 | } | |
186 | ||
187 | SR_PRIV void dso_close(struct sr_dev_inst *sdi) | |
188 | { | |
189 | struct sr_usb_dev_inst *usb; | |
190 | ||
191 | usb = sdi->conn; | |
192 | ||
193 | if (usb->devhdl == NULL) | |
194 | return; | |
195 | ||
196 | sr_info("Closing device %d on %d.%d interface %d.", sdi->index, | |
197 | usb->bus, usb->address, USB_INTERFACE); | |
198 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
199 | libusb_close(usb->devhdl); | |
200 | usb->devhdl = NULL; | |
201 | sdi->status = SR_ST_INACTIVE; | |
202 | ||
203 | } | |
204 | ||
205 | static int get_channel_offsets(const struct sr_dev_inst *sdi) | |
206 | { | |
207 | struct dev_context *devc; | |
208 | struct sr_usb_dev_inst *usb; | |
209 | GString *gs; | |
210 | int chan, v, ret; | |
211 | ||
212 | sr_dbg("Getting channel offsets."); | |
213 | ||
214 | devc = sdi->priv; | |
215 | usb = sdi->conn; | |
216 | ||
217 | ret = libusb_control_transfer(usb->devhdl, | |
218 | LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR, | |
219 | CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0, | |
220 | (unsigned char *)&devc->channel_levels, | |
221 | sizeof(devc->channel_levels), 200); | |
222 | if (ret != sizeof(devc->channel_levels)) { | |
223 | sr_err("Failed to get channel offsets: %s.", | |
224 | libusb_error_name(ret)); | |
225 | return SR_ERR; | |
226 | } | |
227 | ||
228 | /* Comes in as 16-bit numbers with the second byte always 0 on | |
229 | * the DSO-2090. Guessing this is supposed to be big-endian, | |
230 | * since that's how voltage offsets are submitted back to the DSO. | |
231 | * Convert to host order now, so we can use them natively. | |
232 | */ | |
233 | for (chan = 0; chan < 2; chan++) { | |
234 | for (v = 0; v < 9; v++) { | |
235 | devc->channel_levels[chan][v][0] = | |
236 | g_ntohs(devc->channel_levels[chan][v][0]); | |
237 | devc->channel_levels[chan][v][1] = | |
238 | g_ntohs(devc->channel_levels[chan][v][1]); | |
239 | } | |
240 | } | |
241 | ||
242 | if (sr_log_loglevel_get() >= SR_LOG_DBG) { | |
243 | gs = g_string_sized_new(128); | |
244 | for (chan = 0; chan < 2; chan++) { | |
245 | g_string_printf(gs, "CH%d:", chan + 1); | |
246 | for (v = 0; v < 9; v++) { | |
247 | g_string_append_printf(gs, " %.4x-%.4x", | |
248 | devc->channel_levels[chan][v][0], | |
249 | devc->channel_levels[chan][v][1]); | |
250 | } | |
251 | sr_dbg("%s", gs->str); | |
252 | } | |
253 | g_string_free(gs, TRUE); | |
254 | } | |
255 | ||
256 | return SR_OK; | |
257 | } | |
258 | ||
259 | static int dso_set_trigger_samplerate(const struct sr_dev_inst *sdi) | |
260 | { | |
261 | struct dev_context *devc; | |
262 | struct sr_usb_dev_inst *usb; | |
263 | int ret, tmp; | |
264 | uint8_t cmdstring[12]; | |
265 | uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce, | |
266 | 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 }; | |
267 | uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8, | |
268 | 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 }; | |
269 | ||
270 | sr_dbg("Preparing CMD_SET_TRIGGER_SAMPLERATE."); | |
271 | ||
272 | devc = sdi->priv; | |
273 | usb = sdi->conn; | |
274 | ||
275 | memset(cmdstring, 0, sizeof(cmdstring)); | |
276 | /* Command */ | |
277 | cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE; | |
278 | ||
279 | /* Trigger source */ | |
280 | sr_dbg("Trigger source %s.", devc->triggersource); | |
281 | if (!strcmp("CH2", devc->triggersource)) | |
282 | tmp = 0; | |
283 | else if (!strcmp("CH1", devc->triggersource)) | |
284 | tmp = 1; | |
285 | else if (!strcmp("EXT", devc->triggersource)) | |
286 | tmp = 2; | |
287 | else { | |
288 | sr_err("Invalid trigger source: '%s'.", devc->triggersource); | |
289 | return SR_ERR_ARG; | |
290 | } | |
291 | cmdstring[2] = tmp; | |
292 | ||
293 | /* Frame size */ | |
294 | sr_dbg("Frame size: %d.", devc->framesize); | |
295 | cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2; | |
296 | ||
297 | /* Timebase fast */ | |
298 | sr_dbg("Time base index: %d.", devc->timebase); | |
299 | if (devc->framesize == FRAMESIZE_SMALL) { | |
300 | if (devc->timebase < TIME_20us) | |
301 | tmp = 0; | |
302 | else if (devc->timebase == TIME_20us) | |
303 | tmp = 1; | |
304 | else if (devc->timebase == TIME_40us) | |
305 | tmp = 2; | |
306 | else if (devc->timebase == TIME_100us) | |
307 | tmp = 3; | |
308 | else if (devc->timebase >= TIME_200us) | |
309 | tmp = 4; | |
310 | } else { | |
311 | if (devc->timebase < TIME_40us) { | |
312 | sr_err("Timebase < 40us only supported with 10K buffer."); | |
313 | return SR_ERR_ARG; | |
314 | } | |
315 | else if (devc->timebase == TIME_40us) | |
316 | tmp = 0; | |
317 | else if (devc->timebase == TIME_100us) | |
318 | tmp = 2; | |
319 | else if (devc->timebase == TIME_200us) | |
320 | tmp = 3; | |
321 | else if (devc->timebase >= TIME_400us) | |
322 | tmp = 4; | |
323 | } | |
324 | cmdstring[2] |= (tmp & 0x07) << 5; | |
325 | ||
326 | /* Enabled channels: 00=CH1 01=CH2 10=both */ | |
327 | sr_dbg("Channels CH1=%d CH2=%d", devc->ch1_enabled, devc->ch2_enabled); | |
328 | tmp = (((devc->ch2_enabled ? 1 : 0) << 1) + (devc->ch1_enabled ? 1 : 0)) - 1; | |
329 | cmdstring[3] = tmp; | |
330 | ||
331 | /* Fast rates channel */ | |
332 | /* TODO: Is this right? */ | |
333 | tmp = devc->timebase < TIME_10us ? 1 : 0; | |
334 | cmdstring[3] |= tmp << 2; | |
335 | ||
336 | /* Trigger slope: 0=positive 1=negative */ | |
337 | /* TODO: Does this work? */ | |
338 | sr_dbg("Trigger slope: %d.", devc->triggerslope); | |
339 | cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3; | |
340 | ||
341 | /* Timebase slow */ | |
342 | if (devc->timebase < TIME_100us) | |
343 | tmp = 0; | |
344 | else if (devc->timebase > TIME_400ms) | |
345 | tmp = 0xffed; | |
346 | else { | |
347 | if (devc->framesize == FRAMESIZE_SMALL) | |
348 | tmp = timebase_small[devc->timebase - 3]; | |
349 | else | |
350 | tmp = timebase_large[devc->timebase - 3]; | |
351 | } | |
352 | cmdstring[4] = tmp & 0xff; | |
353 | cmdstring[5] = (tmp >> 8) & 0xff; | |
354 | ||
355 | /* Horizontal trigger position */ | |
356 | sr_dbg("Trigger position: %3.2f.", devc->triggerposition); | |
357 | tmp = 0x77fff + 0x8000 * devc->triggerposition; | |
358 | cmdstring[6] = tmp & 0xff; | |
359 | cmdstring[7] = (tmp >> 8) & 0xff; | |
360 | cmdstring[10] = (tmp >> 16) & 0xff; | |
361 | ||
362 | if (send_begin(sdi) != SR_OK) | |
363 | return SR_ERR; | |
364 | ||
365 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, | |
366 | cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) { | |
367 | sr_err("Failed to set trigger/samplerate: %s.", | |
368 | libusb_error_name(ret)); | |
369 | return SR_ERR; | |
370 | } | |
371 | sr_dbg("Sent CMD_SET_TRIGGER_SAMPLERATE."); | |
372 | ||
373 | return SR_OK; | |
374 | } | |
375 | ||
376 | static int dso_set_filters(const struct sr_dev_inst *sdi) | |
377 | { | |
378 | struct dev_context *devc; | |
379 | struct sr_usb_dev_inst *usb; | |
380 | int ret, tmp; | |
381 | uint8_t cmdstring[8]; | |
382 | ||
383 | sr_dbg("Preparing CMD_SET_FILTERS."); | |
384 | ||
385 | devc = sdi->priv; | |
386 | usb = sdi->conn; | |
387 | ||
388 | memset(cmdstring, 0, sizeof(cmdstring)); | |
389 | cmdstring[0] = CMD_SET_FILTERS; | |
390 | cmdstring[1] = 0x0f; | |
391 | if (devc->filter_ch1) { | |
392 | sr_dbg("Turning on CH1 filter."); | |
393 | cmdstring[2] |= 0x80; | |
394 | } | |
395 | if (devc->filter_ch2) { | |
396 | sr_dbg("Turning on CH2 filter."); | |
397 | cmdstring[2] |= 0x40; | |
398 | } | |
399 | if (devc->filter_trigger) { | |
400 | /* TODO: supported on the DSO-2090? */ | |
401 | sr_dbg("Turning on trigger filter."); | |
402 | cmdstring[2] |= 0x20; | |
403 | } | |
404 | ||
405 | if (send_begin(sdi) != SR_OK) | |
406 | return SR_ERR; | |
407 | ||
408 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, | |
409 | cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) { | |
410 | sr_err("Failed to set filters: %s.", libusb_error_name(ret)); | |
411 | return SR_ERR; | |
412 | } | |
413 | sr_dbg("Sent CMD_SET_FILTERS."); | |
414 | ||
415 | return SR_OK; | |
416 | } | |
417 | ||
418 | static int dso_set_voltage(const struct sr_dev_inst *sdi) | |
419 | { | |
420 | struct dev_context *devc; | |
421 | struct sr_usb_dev_inst *usb; | |
422 | int ret, tmp; | |
423 | uint8_t cmdstring[8]; | |
424 | ||
425 | sr_dbg("Preparing CMD_SET_VOLTAGE."); | |
426 | ||
427 | devc = sdi->priv; | |
428 | usb = sdi->conn; | |
429 | ||
430 | memset(cmdstring, 0, sizeof(cmdstring)); | |
431 | cmdstring[0] = CMD_SET_VOLTAGE; | |
432 | cmdstring[1] = 0x0f; | |
433 | cmdstring[2] = 0x30; | |
434 | ||
435 | /* CH1 volts/div is encoded in bits 0-1 */ | |
436 | sr_dbg("CH1 vdiv index: %d.", devc->voltage_ch1); | |
437 | switch (devc->voltage_ch1) { | |
438 | case VDIV_1V: | |
439 | case VDIV_100MV: | |
440 | case VDIV_10MV: | |
441 | cmdstring[2] |= 0x00; | |
442 | break; | |
443 | case VDIV_2V: | |
444 | case VDIV_200MV: | |
445 | case VDIV_20MV: | |
446 | cmdstring[2] |= 0x01; | |
447 | break; | |
448 | case VDIV_5V: | |
449 | case VDIV_500MV: | |
450 | case VDIV_50MV: | |
451 | cmdstring[2] |= 0x02; | |
452 | break; | |
453 | } | |
454 | ||
455 | /* CH2 volts/div is encoded in bits 2-3 */ | |
456 | sr_dbg("CH2 vdiv index: %d.", devc->voltage_ch2); | |
457 | switch (devc->voltage_ch2) { | |
458 | case VDIV_1V: | |
459 | case VDIV_100MV: | |
460 | case VDIV_10MV: | |
461 | cmdstring[2] |= 0x00; | |
462 | break; | |
463 | case VDIV_2V: | |
464 | case VDIV_200MV: | |
465 | case VDIV_20MV: | |
466 | cmdstring[2] |= 0x04; | |
467 | break; | |
468 | case VDIV_5V: | |
469 | case VDIV_500MV: | |
470 | case VDIV_50MV: | |
471 | cmdstring[2] |= 0x08; | |
472 | break; | |
473 | } | |
474 | ||
475 | if (send_begin(sdi) != SR_OK) | |
476 | return SR_ERR; | |
477 | ||
478 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, | |
479 | cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) { | |
480 | sr_err("Failed to set voltage: %s.", libusb_error_name(ret)); | |
481 | return SR_ERR; | |
482 | } | |
483 | sr_dbg("Sent CMD_SET_VOLTAGE."); | |
484 | ||
485 | return SR_OK; | |
486 | } | |
487 | ||
488 | static int dso_set_relays(const struct sr_dev_inst *sdi) | |
489 | { | |
490 | struct dev_context *devc; | |
491 | struct sr_usb_dev_inst *usb; | |
492 | GString *gs; | |
493 | int ret, i; | |
494 | uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01, | |
495 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; | |
496 | ||
497 | sr_dbg("Preparing CTRL_SETRELAYS."); | |
498 | ||
499 | devc = sdi->priv; | |
500 | usb = sdi->conn; | |
501 | ||
502 | if (devc->voltage_ch1 < VDIV_1V) | |
503 | relays[1] = ~relays[1]; | |
504 | ||
505 | if (devc->voltage_ch1 < VDIV_100MV) | |
506 | relays[2] = ~relays[2]; | |
507 | ||
508 | sr_dbg("CH1 coupling: %d.", devc->coupling_ch1); | |
509 | if (devc->coupling_ch1 != COUPLING_AC) | |
510 | relays[3] = ~relays[3]; | |
511 | ||
512 | if (devc->voltage_ch2 < VDIV_1V) | |
513 | relays[4] = ~relays[4]; | |
514 | ||
515 | if (devc->voltage_ch2 < VDIV_100MV) | |
516 | relays[5] = ~relays[5]; | |
517 | ||
518 | sr_dbg("CH2 coupling: %d.", devc->coupling_ch1); | |
519 | if (devc->coupling_ch2 != COUPLING_AC) | |
520 | relays[6] = ~relays[6]; | |
521 | ||
522 | if (!strcmp(devc->triggersource, "EXT")) | |
523 | relays[7] = ~relays[7]; | |
524 | ||
525 | if (sr_log_loglevel_get() >= SR_LOG_DBG) { | |
526 | gs = g_string_sized_new(128); | |
527 | g_string_printf(gs, "Relays:"); | |
528 | for (i = 0; i < 17; i++) | |
529 | g_string_append_printf(gs, " %.2x", relays[i]); | |
530 | sr_dbg("%s", gs->str); | |
531 | g_string_free(gs, TRUE); | |
532 | } | |
533 | ||
534 | if ((ret = libusb_control_transfer(usb->devhdl, | |
535 | LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS, | |
536 | 0, 0, relays, 17, 100)) != sizeof(relays)) { | |
537 | sr_err("Failed to set relays: %s.", libusb_error_name(ret)); | |
538 | return SR_ERR; | |
539 | } | |
540 | sr_dbg("Sent CTRL_SETRELAYS."); | |
541 | ||
542 | return SR_OK; | |
543 | } | |
544 | ||
545 | static int dso_set_voffsets(const struct sr_dev_inst *sdi) | |
546 | { | |
547 | struct dev_context *devc; | |
548 | struct sr_usb_dev_inst *usb; | |
549 | int offset, ret; | |
550 | uint16_t *ch_levels; | |
551 | uint8_t offsets[17]; | |
552 | ||
553 | sr_dbg("Preparing CTRL_SETOFFSET."); | |
554 | ||
555 | devc = sdi->priv; | |
556 | usb = sdi->conn; | |
557 | ||
558 | memset(offsets, 0, sizeof(offsets)); | |
559 | /* Channel 1 */ | |
560 | ch_levels = devc->channel_levels[0][devc->voltage_ch1]; | |
561 | offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0]; | |
562 | offsets[0] = (offset >> 8) | 0x20; | |
563 | offsets[1] = offset & 0xff; | |
564 | sr_dbg("CH1 offset: %3.2f (%.2x%.2x).", devc->voffset_ch1, | |
565 | offsets[0], offsets[1]); | |
566 | ||
567 | /* Channel 2 */ | |
568 | ch_levels = devc->channel_levels[1][devc->voltage_ch2]; | |
569 | offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0]; | |
570 | offsets[2] = (offset >> 8) | 0x20; | |
571 | offsets[3] = offset & 0xff; | |
572 | sr_dbg("CH2 offset: %3.2f (%.2x%.2x).", devc->voffset_ch2, | |
573 | offsets[2], offsets[3]); | |
574 | ||
575 | /* Trigger */ | |
576 | offset = MAX_VERT_TRIGGER * devc->voffset_trigger; | |
577 | offsets[4] = (offset >> 8) | 0x20; | |
578 | offsets[5] = offset & 0xff; | |
579 | sr_dbg("Trigger offset: %3.2f (%.2x%.2x).", devc->voffset_trigger, | |
580 | offsets[4], offsets[5]); | |
581 | ||
582 | if ((ret = libusb_control_transfer(usb->devhdl, | |
583 | LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET, | |
584 | 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) { | |
585 | sr_err("Failed to set offsets: %s.", libusb_error_name(ret)); | |
586 | return SR_ERR; | |
587 | } | |
588 | sr_dbg("Sent CTRL_SETOFFSET."); | |
589 | ||
590 | return SR_OK; | |
591 | } | |
592 | ||
593 | SR_PRIV int dso_enable_trigger(const struct sr_dev_inst *sdi) | |
594 | { | |
595 | struct sr_usb_dev_inst *usb; | |
596 | int ret, tmp; | |
597 | uint8_t cmdstring[2]; | |
598 | ||
599 | sr_dbg("Sending CMD_ENABLE_TRIGGER."); | |
600 | ||
601 | usb = sdi->conn; | |
602 | ||
603 | memset(cmdstring, 0, sizeof(cmdstring)); | |
604 | cmdstring[0] = CMD_ENABLE_TRIGGER; | |
605 | cmdstring[1] = 0x00; | |
606 | ||
607 | if (send_begin(sdi) != SR_OK) | |
608 | return SR_ERR; | |
609 | ||
610 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, | |
611 | cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) { | |
612 | sr_err("Failed to enable trigger: %s.", libusb_error_name(ret)); | |
613 | return SR_ERR; | |
614 | } | |
615 | ||
616 | return SR_OK; | |
617 | } | |
618 | ||
619 | SR_PRIV int dso_force_trigger(const struct sr_dev_inst *sdi) | |
620 | { | |
621 | struct sr_usb_dev_inst *usb; | |
622 | int ret, tmp; | |
623 | uint8_t cmdstring[2]; | |
624 | ||
625 | sr_dbg("Sending CMD_FORCE_TRIGGER."); | |
626 | ||
627 | usb = sdi->conn; | |
628 | ||
629 | memset(cmdstring, 0, sizeof(cmdstring)); | |
630 | cmdstring[0] = CMD_FORCE_TRIGGER; | |
631 | cmdstring[1] = 0x00; | |
632 | ||
633 | if (send_begin(sdi) != SR_OK) | |
634 | return SR_ERR; | |
635 | ||
636 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, | |
637 | cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) { | |
638 | sr_err("Failed to force trigger: %s.", libusb_error_name(ret)); | |
639 | return SR_ERR; | |
640 | } | |
641 | ||
642 | return SR_OK; | |
643 | } | |
644 | ||
645 | SR_PRIV int dso_init(const struct sr_dev_inst *sdi) | |
646 | { | |
647 | ||
648 | sr_dbg("Initializing DSO."); | |
649 | ||
650 | if (get_channel_offsets(sdi) != SR_OK) | |
651 | return SR_ERR; | |
652 | ||
653 | if (dso_set_trigger_samplerate(sdi) != SR_OK) | |
654 | return SR_ERR; | |
655 | ||
656 | if (dso_set_filters(sdi) != SR_OK) | |
657 | return SR_ERR; | |
658 | ||
659 | if (dso_set_voltage(sdi) != SR_OK) | |
660 | return SR_ERR; | |
661 | ||
662 | if (dso_set_relays(sdi) != SR_OK) | |
663 | return SR_ERR; | |
664 | ||
665 | if (dso_set_voffsets(sdi) != SR_OK) | |
666 | return SR_ERR; | |
667 | ||
668 | if (dso_enable_trigger(sdi) != SR_OK) | |
669 | return SR_ERR; | |
670 | ||
671 | return SR_OK; | |
672 | } | |
673 | ||
674 | SR_PRIV int dso_get_capturestate(const struct sr_dev_inst *sdi, | |
675 | uint8_t *capturestate, uint32_t *trigger_offset) | |
676 | { | |
677 | struct sr_usb_dev_inst *usb; | |
678 | int ret, tmp, i; | |
679 | unsigned int bitvalue, toff; | |
680 | uint8_t cmdstring[2], inbuf[512]; | |
681 | ||
682 | sr_dbg("Sending CMD_GET_CAPTURESTATE."); | |
683 | ||
684 | usb = sdi->conn; | |
685 | ||
686 | cmdstring[0] = CMD_GET_CAPTURESTATE; | |
687 | cmdstring[1] = 0; | |
688 | ||
689 | if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) { | |
690 | sr_dbg("Failed to send get_capturestate command: %s.", | |
691 | libusb_error_name(ret)); | |
692 | return SR_ERR; | |
693 | } | |
694 | ||
695 | if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_IN, | |
696 | inbuf, 512, &tmp, 100)) != 0) { | |
697 | sr_dbg("Failed to get capturestate: %s.", | |
698 | libusb_error_name(ret)); | |
699 | return SR_ERR; | |
700 | } | |
701 | *capturestate = inbuf[0]; | |
702 | toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2]; | |
703 | ||
704 | /* | |
705 | * This conversion comes from the openhantek project. | |
706 | * Each set bit in the 24-bit value inverts all bits with a lower | |
707 | * value. No idea why the device reports the trigger point this way. | |
708 | */ | |
709 | bitvalue = 1; | |
710 | for (i = 0; i < 24; i++) { | |
711 | /* Each set bit inverts all bits with a lower value. */ | |
712 | if(toff & bitvalue) | |
713 | toff ^= bitvalue - 1; | |
714 | bitvalue <<= 1; | |
715 | } | |
716 | *trigger_offset = toff; | |
717 | ||
718 | return SR_OK; | |
719 | } | |
720 | ||
721 | SR_PRIV int dso_capture_start(const struct sr_dev_inst *sdi) | |
722 | { | |
723 | int ret; | |
724 | uint8_t cmdstring[2]; | |
725 | ||
726 | sr_dbg("Sending CMD_CAPTURE_START."); | |
727 | ||
728 | cmdstring[0] = CMD_CAPTURE_START; | |
729 | cmdstring[1] = 0; | |
730 | ||
731 | if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) { | |
732 | sr_err("Failed to send capture_start command: %s.", | |
733 | libusb_error_name(ret)); | |
734 | return SR_ERR; | |
735 | } | |
736 | ||
737 | return SR_OK; | |
738 | } | |
739 | ||
740 | SR_PRIV int dso_get_channeldata(const struct sr_dev_inst *sdi, | |
741 | libusb_transfer_cb_fn cb) | |
742 | { | |
743 | struct dev_context *devc; | |
744 | struct sr_usb_dev_inst *usb; | |
745 | struct libusb_transfer *transfer; | |
746 | int num_transfers, ret, i; | |
747 | uint8_t cmdstring[2]; | |
748 | unsigned char *buf; | |
749 | ||
750 | sr_dbg("Sending CMD_GET_CHANNELDATA."); | |
751 | ||
752 | devc = sdi->priv; | |
753 | usb = sdi->conn; | |
754 | ||
755 | cmdstring[0] = CMD_GET_CHANNELDATA; | |
756 | cmdstring[1] = 0; | |
757 | ||
758 | if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) { | |
759 | sr_err("Failed to get channel data: %s.", | |
760 | libusb_error_name(ret)); | |
761 | return SR_ERR; | |
762 | } | |
763 | ||
764 | /* TODO: DSO-2xxx only. */ | |
765 | num_transfers = devc->framesize * | |
766 | sizeof(unsigned short) / devc->epin_maxpacketsize; | |
767 | sr_dbg("Queueing up %d transfers.", num_transfers); | |
768 | for (i = 0; i < num_transfers; i++) { | |
769 | if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) { | |
770 | sr_err("Failed to malloc USB endpoint buffer."); | |
771 | return SR_ERR_MALLOC; | |
772 | } | |
773 | transfer = libusb_alloc_transfer(0); | |
774 | libusb_fill_bulk_transfer(transfer, usb->devhdl, DSO_EP_IN, buf, | |
775 | devc->epin_maxpacketsize, cb, (void *)sdi, 40); | |
776 | if ((ret = libusb_submit_transfer(transfer)) != 0) { | |
777 | sr_err("Failed to submit transfer: %s.", | |
778 | libusb_error_name(ret)); | |
779 | /* TODO: Free them all. */ | |
780 | libusb_free_transfer(transfer); | |
781 | g_free(buf); | |
782 | return SR_ERR; | |
783 | } | |
784 | } | |
785 | ||
786 | return SR_OK; | |
787 | } |