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sr_driver_init(): Improve checks.
[libsigrok.git] / hardware / zeroplus-logic-cube / zeroplus.c
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1/*
2 * This file is part of the sigrok project.
3 *
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.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 <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/time.h>
24#include <inttypes.h>
25#include <glib.h>
26#include <libusb.h>
27#include "libsigrok.h"
28#include "libsigrok-internal.h"
29#include "analyzer.h"
30
31#define USB_VENDOR 0x0c12
32
33#define VENDOR_NAME "ZEROPLUS"
34#define MODEL_NAME "Logic Cube LAP-C"
35#define MODEL_VERSION NULL
36
37#define NUM_PROBES 16
38#define USB_INTERFACE 0
39#define USB_CONFIGURATION 1
40#define NUM_TRIGGER_STAGES 4
41#define TRIGGER_TYPE "01"
42
43#define PACKET_SIZE 2048 /* ?? */
44
45//#define ZP_EXPERIMENTAL
46
47typedef struct {
48 unsigned short vid;
49 unsigned short pid;
50 char *model_name;
51 unsigned int channels;
52 unsigned int sample_depth; /* In Ksamples/channel */
53 unsigned int max_sampling_freq;
54} model_t;
55
56/*
57 * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
58 * same 128K sample depth.
59 */
60static model_t zeroplus_models[] = {
61 {0x0c12, 0x7009, "LAP-C(16064)", 16, 64, 100},
62 {0x0c12, 0x700A, "LAP-C(16128)", 16, 128, 200},
63 /* TODO: we don't know anything about these
64 {0x0c12, 0x700B, "LAP-C(32128)", 32, 128, 200},
65 {0x0c12, 0x700C, "LAP-C(321000)", 32, 1024, 200},
66 {0x0c12, 0x700D, "LAP-C(322000)", 32, 2048, 200},
67 */
68 {0x0c12, 0x700E, "LAP-C(16032)", 16, 32, 100},
69 {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
70 { 0, 0, 0, 0, 0, 0 }
71};
72
73static const int hwcaps[] = {
74 SR_CONF_LOGIC_ANALYZER,
75 SR_CONF_SAMPLERATE,
76 SR_CONF_CAPTURE_RATIO,
77
78 /* These are really implemented in the driver, not the hardware. */
79 SR_CONF_LIMIT_SAMPLES,
80 0,
81};
82
83/*
84 * ZEROPLUS LAP-C (16032) numbers the 16 probes A0-A7 and B0-B7.
85 * We currently ignore other untested/unsupported devices here.
86 */
87static const char *probe_names[NUM_PROBES + 1] = {
88 "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
89 "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
90 NULL,
91};
92
93/* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
94SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
95static struct sr_dev_driver *di = &zeroplus_logic_cube_driver_info;
96
97/*
98 * The hardware supports more samplerates than these, but these are the
99 * options hardcoded into the vendor's Windows GUI.
100 */
101
102/*
103 * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
104 * that high.
105 */
106static const uint64_t supported_samplerates[] = {
107 SR_HZ(100),
108 SR_HZ(500),
109 SR_KHZ(1),
110 SR_KHZ(5),
111 SR_KHZ(25),
112 SR_KHZ(50),
113 SR_KHZ(100),
114 SR_KHZ(200),
115 SR_KHZ(400),
116 SR_KHZ(800),
117 SR_MHZ(1),
118 SR_MHZ(10),
119 SR_MHZ(25),
120 SR_MHZ(50),
121 SR_MHZ(80),
122 SR_MHZ(100),
123 SR_MHZ(150),
124 SR_MHZ(200),
125 0,
126};
127
128static const struct sr_samplerates samplerates = {
129 0,
130 0,
131 0,
132 supported_samplerates,
133};
134
135/* Private, per-device-instance driver context. */
136struct dev_context {
137 uint64_t cur_samplerate;
138 uint64_t max_samplerate;
139 uint64_t limit_samples;
140 int num_channels; /* TODO: This isn't initialized before it's needed :( */
141 int memory_size;
142 unsigned int max_memory_size;
143 //uint8_t probe_mask;
144 //uint8_t trigger_mask[NUM_TRIGGER_STAGES];
145 //uint8_t trigger_value[NUM_TRIGGER_STAGES];
146 // uint8_t trigger_buffer[NUM_TRIGGER_STAGES];
147 int trigger;
148 unsigned int capture_ratio;
149
150 /* TODO: this belongs in the device instance */
151 struct sr_usb_dev_inst *usb;
152};
153
154static int hw_dev_close(struct sr_dev_inst *sdi);
155
156static unsigned int get_memory_size(int type)
157{
158 if (type == MEMORY_SIZE_8K)
159 return 8 * 1024;
160 else if (type == MEMORY_SIZE_64K)
161 return 64 * 1024;
162 else if (type == MEMORY_SIZE_128K)
163 return 128 * 1024;
164 else if (type == MEMORY_SIZE_512K)
165 return 512 * 1024;
166 else
167 return 0;
168}
169
170#if 0
171static int configure_probes(const struct sr_dev_inst *sdi)
172{
173 struct dev_context *devc;
174 const struct sr_probe *probe;
175 const GSList *l;
176 int probe_bit, stage, i;
177 char *tc;
178
179 /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
180 devc = sdi->priv;
181
182 devc->probe_mask = 0;
183 for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
184 devc->trigger_mask[i] = 0;
185 devc->trigger_value[i] = 0;
186 }
187
188 stage = -1;
189 for (l = sdi->probes; l; l = l->next) {
190 probe = (struct sr_probe *)l->data;
191 if (probe->enabled == FALSE)
192 continue;
193 probe_bit = 1 << (probe->index);
194 devc->probe_mask |= probe_bit;
195
196 if (probe->trigger) {
197 stage = 0;
198 for (tc = probe->trigger; *tc; tc++) {
199 devc->trigger_mask[stage] |= probe_bit;
200 if (*tc == '1')
201 devc->trigger_value[stage] |= probe_bit;
202 stage++;
203 if (stage > NUM_TRIGGER_STAGES)
204 return SR_ERR;
205 }
206 }
207 }
208
209 return SR_OK;
210}
211#endif
212
213static int configure_probes(const struct sr_dev_inst *sdi)
214{
215 struct dev_context *devc;
216 const GSList *l;
217 const struct sr_probe *probe;
218 char *tc;
219 int type;
220
221 /* Note: sdi and sdi->priv are non-NULL, the caller checked this. */
222 devc = sdi->priv;
223
224 for (l = sdi->probes; l; l = l->next) {
225 probe = (struct sr_probe *)l->data;
226 if (probe->enabled == FALSE)
227 continue;
228
229 if ((tc = probe->trigger)) {
230 switch (*tc) {
231 case '1':
232 type = TRIGGER_HIGH;
233 break;
234 case '0':
235 type = TRIGGER_LOW;
236 break;
237#if 0
238 case 'r':
239 type = TRIGGER_POSEDGE;
240 break;
241 case 'f':
242 type = TRIGGER_NEGEDGE;
243 break;
244 case 'c':
245 type = TRIGGER_ANYEDGE;
246 break;
247#endif
248 default:
249 return SR_ERR;
250 }
251 analyzer_add_trigger(probe->index, type);
252 devc->trigger = 1;
253 }
254 }
255
256 return SR_OK;
257}
258
259static int clear_instances(void)
260{
261 GSList *l;
262 struct sr_dev_inst *sdi;
263 struct drv_context *drvc;
264 struct dev_context *devc;
265
266 drvc = di->priv;
267 for (l = drvc->instances; l; l = l->next) {
268 sdi = l->data;
269 if (!(devc = sdi->priv)) {
270 /* Log error, but continue cleaning up the rest. */
271 sr_err("zeroplus: %s: sdi->priv was NULL, continuing", __func__);
272 continue;
273 }
274 sr_usb_dev_inst_free(devc->usb);
275 /* Properly close all devices... */
276 hw_dev_close(sdi);
277 /* ...and free all their memory. */
278 sr_dev_inst_free(sdi);
279 }
280 g_slist_free(drvc->instances);
281 drvc->instances = NULL;
282
283 return SR_OK;
284}
285
286/*
287 * API callbacks
288 */
289
290static int hw_init(struct sr_context *sr_ctx)
291{
292 struct drv_context *drvc;
293
294 if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
295 sr_err("Driver context malloc failed.");
296 return SR_ERR_MALLOC;
297 }
298
299 drvc->sr_ctx = sr_ctx;
300 di->priv = drvc;
301
302 return SR_OK;
303}
304
305static GSList *hw_scan(GSList *options)
306{
307 struct sr_dev_inst *sdi;
308 struct sr_probe *probe;
309 struct drv_context *drvc;
310 struct dev_context *devc;
311 model_t *prof;
312 struct libusb_device_descriptor des;
313 libusb_device **devlist;
314 GSList *devices;
315 int ret, devcnt, i, j;
316
317 (void)options;
318
319 drvc = di->priv;
320 devices = NULL;
321
322 clear_instances();
323
324 /* Find all ZEROPLUS analyzers and add them to device list. */
325 devcnt = 0;
326 libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
327
328 for (i = 0; devlist[i]; i++) {
329 ret = libusb_get_device_descriptor(devlist[i], &des);
330 if (ret != 0) {
331 sr_err("zp: failed to get device descriptor: %s",
332 libusb_error_name(ret));
333 continue;
334 }
335
336 prof = NULL;
337 for (j = 0; j < zeroplus_models[j].vid; j++) {
338 if (des.idVendor == zeroplus_models[j].vid &&
339 des.idProduct == zeroplus_models[j].pid) {
340 prof = &zeroplus_models[j];
341 }
342 }
343 /* Skip if the device was not found */
344 if (!prof)
345 continue;
346 sr_info("zp: Found ZEROPLUS model %s", prof->model_name);
347
348 /* Register the device with libsigrok. */
349 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
350 VENDOR_NAME, prof->model_name, NULL))) {
351 sr_err("zp: %s: sr_dev_inst_new failed", __func__);
352 return NULL;
353 }
354 sdi->driver = di;
355
356 /* Allocate memory for our private driver context. */
357 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
358 sr_err("zp: %s: devc malloc failed", __func__);
359 return NULL;
360 }
361 sdi->priv = devc;
362 devc->num_channels = prof->channels;
363#ifdef ZP_EXPERIMENTAL
364 devc->max_memory_size = 128 * 1024;
365 devc->max_samplerate = 200;
366#else
367 devc->max_memory_size = prof->sample_depth * 1024;
368 devc->max_samplerate = prof->max_sampling_freq;
369#endif
370 devc->max_samplerate *= SR_MHZ(1);
371 devc->memory_size = MEMORY_SIZE_8K;
372 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
373
374 /* Fill in probelist according to this device's profile. */
375 for (j = 0; j < devc->num_channels; j++) {
376 if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE,
377 probe_names[j])))
378 return NULL;
379 sdi->probes = g_slist_append(sdi->probes, probe);
380 }
381
382 devices = g_slist_append(devices, sdi);
383 drvc->instances = g_slist_append(drvc->instances, sdi);
384 devc->usb = sr_usb_dev_inst_new(
385 libusb_get_bus_number(devlist[i]),
386 libusb_get_device_address(devlist[i]), NULL);
387 devcnt++;
388
389 }
390 libusb_free_device_list(devlist, 1);
391
392 return devices;
393}
394
395static GSList *hw_dev_list(void)
396{
397 struct drv_context *drvc;
398
399 drvc = di->priv;
400
401 return drvc->instances;
402}
403
404static int hw_dev_open(struct sr_dev_inst *sdi)
405{
406 struct dev_context *devc;
407 struct drv_context *drvc = di->priv;
408 libusb_device **devlist, *dev;
409 struct libusb_device_descriptor des;
410 int device_count, ret, i;
411
412 if (!(devc = sdi->priv)) {
413 sr_err("zp: %s: sdi->priv was NULL", __func__);
414 return SR_ERR_ARG;
415 }
416
417 device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx,
418 &devlist);
419 if (device_count < 0) {
420 sr_err("zp: Failed to retrieve device list");
421 return SR_ERR;
422 }
423
424 dev = NULL;
425 for (i = 0; i < device_count; i++) {
426 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
427 sr_err("zp: Failed to get device descriptor: %s.",
428 libusb_error_name(ret));
429 continue;
430 }
431 if (libusb_get_bus_number(devlist[i]) == devc->usb->bus
432 && libusb_get_device_address(devlist[i]) == devc->usb->address) {
433 dev = devlist[i];
434 break;
435 }
436 }
437 if (!dev) {
438 sr_err("device on bus %d address %d disappeared!",
439 devc->usb->bus, devc->usb->address);
440 return SR_ERR;
441 }
442
443 if (!(ret = libusb_open(dev, &(devc->usb->devhdl)))) {
444 sdi->status = SR_ST_ACTIVE;
445 sr_info("zp: opened device %d on %d.%d interface %d",
446 sdi->index, devc->usb->bus,
447 devc->usb->address, USB_INTERFACE);
448 } else {
449 sr_err("zp: failed to open device: %s", libusb_error_name(ret));
450 return SR_ERR;
451 }
452
453 ret = libusb_set_configuration(devc->usb->devhdl, USB_CONFIGURATION);
454 if (ret < 0) {
455 sr_err("zp: Unable to set USB configuration %d: %s",
456 USB_CONFIGURATION, libusb_error_name(ret));
457 return SR_ERR;
458 }
459
460 ret = libusb_claim_interface(devc->usb->devhdl, USB_INTERFACE);
461 if (ret != 0) {
462 sr_err("zp: Unable to claim interface: %s",
463 libusb_error_name(ret));
464 return SR_ERR;
465 }
466
467 /* Set default configuration after power on */
468 if (analyzer_read_status(devc->usb->devhdl) == 0)
469 analyzer_configure(devc->usb->devhdl);
470
471 analyzer_reset(devc->usb->devhdl);
472 analyzer_initialize(devc->usb->devhdl);
473
474 //analyzer_set_memory_size(MEMORY_SIZE_512K);
475 // analyzer_set_freq(g_freq, g_freq_scale);
476 analyzer_set_trigger_count(1);
477 // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
478 // * get_memory_size(g_memory_size)) / 100) >> 2);
479
480#if 0
481 if (g_double_mode == 1)
482 analyzer_set_compression(COMPRESSION_DOUBLE);
483 else if (g_compression == 1)
484 analyzer_set_compression(COMPRESSION_ENABLE);
485 else
486#endif
487 analyzer_set_compression(COMPRESSION_NONE);
488
489 if (devc->cur_samplerate == 0) {
490 /* Samplerate hasn't been set. Default to 1MHz. */
491 analyzer_set_freq(1, FREQ_SCALE_MHZ);
492 devc->cur_samplerate = SR_MHZ(1);
493 }
494
495 return SR_OK;
496}
497
498static int hw_dev_close(struct sr_dev_inst *sdi)
499{
500 struct dev_context *devc;
501
502 if (!(devc = sdi->priv)) {
503 sr_err("zp: %s: sdi->priv was NULL", __func__);
504 return SR_ERR;
505 }
506
507 if (!devc->usb->devhdl)
508 return SR_ERR;
509
510 sr_info("zp: closing device %d on %d.%d interface %d", sdi->index,
511 devc->usb->bus, devc->usb->address, USB_INTERFACE);
512 libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
513 libusb_reset_device(devc->usb->devhdl);
514 libusb_close(devc->usb->devhdl);
515 devc->usb->devhdl = NULL;
516 sdi->status = SR_ST_INACTIVE;
517
518 return SR_OK;
519}
520
521static int hw_cleanup(void)
522{
523 struct drv_context *drvc;
524
525 if (!(drvc = di->priv))
526 return SR_OK;
527
528 clear_instances();
529
530 return SR_OK;
531}
532
533static int config_get(int id, const void **data, const struct sr_dev_inst *sdi)
534{
535 struct dev_context *devc;
536
537 switch (id) {
538 case SR_CONF_SAMPLERATE:
539 if (sdi) {
540 devc = sdi->priv;
541 *data = &devc->cur_samplerate;
542 sr_spew("zp: %s: Returning samplerate: %" PRIu64 "Hz.",
543 __func__, devc->cur_samplerate);
544 } else
545 return SR_ERR;
546 break;
547 default:
548 return SR_ERR_ARG;
549 }
550
551 return SR_OK;
552}
553
554static int set_samplerate(struct dev_context *devc, uint64_t samplerate)
555{
556 int i;
557
558 for (i = 0; supported_samplerates[i]; i++)
559 if (samplerate == supported_samplerates[i])
560 break;
561 if (!supported_samplerates[i] || samplerate > devc->max_samplerate) {
562 sr_err("zp: %s: unsupported samplerate", __func__);
563 return SR_ERR_ARG;
564 }
565
566 sr_info("zp: Setting samplerate to %" PRIu64 "Hz.", samplerate);
567
568 if (samplerate >= SR_MHZ(1))
569 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
570 else if (samplerate >= SR_KHZ(1))
571 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
572 else
573 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
574
575 devc->cur_samplerate = samplerate;
576
577 return SR_OK;
578}
579
580static int set_limit_samples(struct dev_context *devc, uint64_t samples)
581{
582 devc->limit_samples = samples;
583
584 if (samples <= 2 * 1024)
585 devc->memory_size = MEMORY_SIZE_8K;
586 else if (samples <= 16 * 1024)
587 devc->memory_size = MEMORY_SIZE_64K;
588 else if (samples <= 32 * 1024 ||
589 devc->max_memory_size <= 32 * 1024)
590 devc->memory_size = MEMORY_SIZE_128K;
591 else
592 devc->memory_size = MEMORY_SIZE_512K;
593
594 sr_info("zp: Setting memory size to %dK.",
595 get_memory_size(devc->memory_size) / 1024);
596
597 analyzer_set_memory_size(devc->memory_size);
598
599 return SR_OK;
600}
601
602static int set_capture_ratio(struct dev_context *devc, uint64_t ratio)
603{
604 if (ratio > 100) {
605 sr_err("zp: %s: invalid capture ratio", __func__);
606 return SR_ERR_ARG;
607 }
608
609 devc->capture_ratio = ratio;
610
611 sr_info("zp: Setting capture ratio to %d%%.", devc->capture_ratio);
612
613 return SR_OK;
614}
615
616static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
617{
618 struct dev_context *devc;
619
620 if (!sdi) {
621 sr_err("zp: %s: sdi was NULL", __func__);
622 return SR_ERR_ARG;
623 }
624
625 if (!(devc = sdi->priv)) {
626 sr_err("zp: %s: sdi->priv was NULL", __func__);
627 return SR_ERR_ARG;
628 }
629
630 switch (id) {
631 case SR_CONF_SAMPLERATE:
632 return set_samplerate(devc, *(const uint64_t *)value);
633 case SR_CONF_LIMIT_SAMPLES:
634 return set_limit_samples(devc, *(const uint64_t *)value);
635 case SR_CONF_CAPTURE_RATIO:
636 return set_capture_ratio(devc, *(const uint64_t *)value);
637 default:
638 return SR_ERR;
639 }
640}
641
642static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
643{
644
645 (void)sdi;
646
647 switch (key) {
648 case SR_CONF_DEVICE_OPTIONS:
649 *data = hwcaps;
650 break;
651 case SR_CONF_SAMPLERATE:
652 *data = &samplerates;
653 break;
654 case SR_CONF_TRIGGER_TYPE:
655 *data = TRIGGER_TYPE;
656 break;
657 default:
658 return SR_ERR_ARG;
659 }
660
661 return SR_OK;
662}
663
664static void set_triggerbar(struct dev_context *devc)
665{
666 unsigned int ramsize;
667 unsigned int n;
668 unsigned int triggerbar;
669
670 ramsize = get_memory_size(devc->memory_size) / 4;
671 if (devc->trigger) {
672 n = ramsize;
673 if (devc->max_memory_size < n)
674 n = devc->max_memory_size;
675 if (devc->limit_samples < n)
676 n = devc->limit_samples;
677 n = n * devc->capture_ratio / 100;
678 if (n > ramsize - 8)
679 triggerbar = ramsize - 8;
680 else
681 triggerbar = n;
682 } else {
683 triggerbar = 0;
684 }
685 analyzer_set_triggerbar_address(triggerbar);
686 analyzer_set_ramsize_trigger_address(ramsize - triggerbar);
687
688 sr_dbg("zp: triggerbar_address = %d(0x%x)", triggerbar, triggerbar);
689 sr_dbg("zp: ramsize_triggerbar_address = %d(0x%x)",
690 ramsize - triggerbar, ramsize - triggerbar);
691}
692
693static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
694 void *cb_data)
695{
696 struct sr_datafeed_packet packet;
697 struct sr_datafeed_logic logic;
698 struct sr_datafeed_header header;
699 //uint64_t samples_read;
700 int res;
701 unsigned int packet_num;
702 unsigned int n;
703 unsigned char *buf;
704 struct dev_context *devc;
705
706 if (!(devc = sdi->priv)) {
707 sr_err("zp: %s: sdi->priv was NULL", __func__);
708 return SR_ERR_ARG;
709 }
710
711 if (configure_probes(sdi) != SR_OK) {
712 sr_err("zp: failed to configured probes");
713 return SR_ERR;
714 }
715
716 set_triggerbar(devc);
717
718 /* push configured settings to device */
719 analyzer_configure(devc->usb->devhdl);
720
721 analyzer_start(devc->usb->devhdl);
722 sr_info("zp: Waiting for data");
723 analyzer_wait_data(devc->usb->devhdl);
724
725 sr_info("zp: Stop address = 0x%x",
726 analyzer_get_stop_address(devc->usb->devhdl));
727 sr_info("zp: Now address = 0x%x",
728 analyzer_get_now_address(devc->usb->devhdl));
729 sr_info("zp: Trigger address = 0x%x",
730 analyzer_get_trigger_address(devc->usb->devhdl));
731
732 packet.type = SR_DF_HEADER;
733 packet.payload = &header;
734 header.feed_version = 1;
735 gettimeofday(&header.starttime, NULL);
736 sr_session_send(cb_data, &packet);
737
738 if (!(buf = g_try_malloc(PACKET_SIZE))) {
739 sr_err("zp: %s: buf malloc failed", __func__);
740 return SR_ERR_MALLOC;
741 }
742
743 //samples_read = 0;
744 analyzer_read_start(devc->usb->devhdl);
745 /* Send the incoming transfer to the session bus. */
746 n = get_memory_size(devc->memory_size);
747 if (devc->max_memory_size * 4 < n)
748 n = devc->max_memory_size * 4;
749 for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
750 res = analyzer_read_data(devc->usb->devhdl, buf, PACKET_SIZE);
751 sr_info("zp: Tried to read %d bytes, actually read %d bytes",
752 PACKET_SIZE, res);
753
754 packet.type = SR_DF_LOGIC;
755 packet.payload = &logic;
756 logic.length = PACKET_SIZE;
757 logic.unitsize = 4;
758 logic.data = buf;
759 sr_session_send(cb_data, &packet);
760 //samples_read += res / 4;
761 }
762 analyzer_read_stop(devc->usb->devhdl);
763 g_free(buf);
764
765 packet.type = SR_DF_END;
766 sr_session_send(cb_data, &packet);
767
768 return SR_OK;
769}
770
771/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
772static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
773{
774 struct sr_datafeed_packet packet;
775 struct dev_context *devc;
776
777 packet.type = SR_DF_END;
778 sr_session_send(cb_data, &packet);
779
780 if (!(devc = sdi->priv)) {
781 sr_err("zp: %s: sdi->priv was NULL", __func__);
782 return SR_ERR_BUG;
783 }
784
785 analyzer_reset(devc->usb->devhdl);
786 /* TODO: Need to cancel and free any queued up transfers. */
787
788 return SR_OK;
789}
790
791SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
792 .name = "zeroplus-logic-cube",
793 .longname = "ZEROPLUS Logic Cube LAP-C series",
794 .api_version = 1,
795 .init = hw_init,
796 .cleanup = hw_cleanup,
797 .scan = hw_scan,
798 .dev_list = hw_dev_list,
799 .dev_clear = hw_cleanup,
800 .config_get = config_get,
801 .config_set = config_set,
802 .config_list = config_list,
803 .dev_open = hw_dev_open,
804 .dev_close = hw_dev_close,
805 .dev_acquisition_start = hw_dev_acquisition_start,
806 .dev_acquisition_stop = hw_dev_acquisition_stop,
807 .priv = NULL,
808};
Hardware access and backend lib