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1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * ASIX Sigma Logic Analyzer Driver | |
5 | * | |
6 | * Copyright (C) 2010 | |
7 | * | |
8 | * Håvard Espeland <gus@ping.uio.no>, | |
9 | * Martin Stensgård <mastensg@ping.uio.no> | |
10 | * Carl Henrik Lunde <chlunde@ping.uio.no> | |
11 | * | |
12 | * This program is free software: you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation, either version 3 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
24 | */ | |
25 | ||
26 | #include <ftdi.h> | |
27 | #include <string.h> | |
28 | #include <zlib.h> | |
29 | ||
30 | #include "sigrok.h" | |
31 | #include "asix-sigma.h" | |
32 | ||
33 | #define USB_VENDOR 0xa600 | |
34 | #define USB_PRODUCT 0xa000 | |
35 | #define USB_DESCRIPTION "ASIX SIGMA" | |
36 | #define USB_VENDOR_NAME "ASIX" | |
37 | #define USB_MODEL_NAME "SIGMA" | |
38 | #define USB_MODEL_VERSION "" | |
39 | #define FIRMWARE FIRMWARE_DIR "/asix-sigma-200.firmware" | |
40 | ||
41 | static GSList *device_instances = NULL; | |
42 | ||
43 | // XXX These should be per device | |
44 | static struct ftdi_context ftdic; | |
45 | static uint64_t cur_samplerate = MHZ(200); | |
46 | static uint32_t limit_msec = 0; | |
47 | static struct timeval start_tv; | |
48 | ||
49 | static uint64_t supported_samplerates[] = { | |
50 | MHZ(200), | |
51 | 0, | |
52 | }; | |
53 | ||
54 | static struct samplerates samplerates = { | |
55 | MHZ(200), | |
56 | MHZ(200), | |
57 | 0, | |
58 | supported_samplerates, | |
59 | }; | |
60 | ||
61 | static int capabilities[] = { | |
62 | HWCAP_LOGIC_ANALYZER, | |
63 | HWCAP_SAMPLERATE, | |
64 | ||
65 | /* These are really implemented in the driver, not the hardware. */ | |
66 | HWCAP_LIMIT_MSEC, | |
67 | 0, | |
68 | }; | |
69 | ||
70 | static int sigma_read(void* buf, size_t size) | |
71 | { | |
72 | int ret; | |
73 | ret = ftdi_read_data(&ftdic, (unsigned char*) buf, size); | |
74 | if (ret < 0) { | |
75 | g_warning("ftdi_read_data failed: %s", | |
76 | ftdi_get_error_string(&ftdic)); | |
77 | } | |
78 | ||
79 | return ret; | |
80 | } | |
81 | ||
82 | static int sigma_write(void* buf, size_t size) | |
83 | { | |
84 | int ret; | |
85 | ret = ftdi_write_data(&ftdic, (unsigned char*) buf, size); | |
86 | if (ret < 0) { | |
87 | g_warning("ftdi_write_data failed: %s", | |
88 | ftdi_get_error_string(&ftdic)); | |
89 | } | |
90 | else if ((size_t) ret != size) { | |
91 | g_warning("ftdi_write_data did not complete write\n"); | |
92 | } | |
93 | ||
94 | return ret; | |
95 | } | |
96 | ||
97 | static int sigma_write_register(uint8_t reg, uint8_t *data, size_t len) | |
98 | { | |
99 | size_t i; | |
100 | uint8_t buf[len + 2]; | |
101 | int idx = 0; | |
102 | ||
103 | buf[idx++] = REG_ADDR_LOW | (reg & 0xf); | |
104 | buf[idx++] = REG_ADDR_HIGH | (reg >> 4); | |
105 | ||
106 | for (i=0; i<len; ++i) { | |
107 | buf[idx++] = REG_DATA_LOW | (data[i] & 0xf); | |
108 | buf[idx++] = REG_DATA_HIGH_WRITE | (data[i] >> 4); | |
109 | } | |
110 | ||
111 | return sigma_write(buf, idx); | |
112 | } | |
113 | ||
114 | static int sigma_set_register(uint8_t reg, uint8_t value) | |
115 | { | |
116 | return sigma_write_register(reg, &value, 1); | |
117 | } | |
118 | ||
119 | static int sigma_read_register(uint8_t reg, uint8_t *data, size_t len) | |
120 | { | |
121 | uint8_t buf[3]; | |
122 | buf[0] = REG_ADDR_LOW | (reg & 0xf); | |
123 | buf[1] = REG_ADDR_HIGH | (reg >> 4); | |
124 | ||
125 | buf[2] = REG_READ_ADDR; | |
126 | ||
127 | sigma_write(buf, sizeof(buf)); | |
128 | ||
129 | return sigma_read(data, len); | |
130 | } | |
131 | ||
132 | static uint8_t sigma_get_register(uint8_t reg) | |
133 | { | |
134 | uint8_t value; | |
135 | if (1 != sigma_read_register(reg, &value, 1)) { | |
136 | g_warning("Sigma_get_register: 1 byte expected"); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | return value; | |
141 | } | |
142 | ||
143 | static int sigma_read_pos(uint32_t *stoppos, uint32_t *triggerpos) | |
144 | { | |
145 | uint8_t buf[] = { | |
146 | REG_ADDR_LOW | READ_TRIGGER_POS_LOW, | |
147 | ||
148 | REG_READ_ADDR | NEXT_REG, | |
149 | REG_READ_ADDR | NEXT_REG, | |
150 | REG_READ_ADDR | NEXT_REG, | |
151 | REG_READ_ADDR | NEXT_REG, | |
152 | REG_READ_ADDR | NEXT_REG, | |
153 | REG_READ_ADDR | NEXT_REG, | |
154 | }; | |
155 | ||
156 | uint8_t result[6]; | |
157 | ||
158 | sigma_write(buf, sizeof(buf)); | |
159 | ||
160 | sigma_read(result, sizeof(result)); | |
161 | ||
162 | *triggerpos = result[0] | (result[1] << 8) | (result[2] << 16); | |
163 | *stoppos = result[3] | (result[4] << 8) | (result[5] << 16); | |
164 | ||
165 | return 1; | |
166 | } | |
167 | ||
168 | static int sigma_read_dram(uint16_t startchunk, size_t numchunks, uint8_t *data) | |
169 | { | |
170 | size_t i; | |
171 | uint8_t buf[4096]; | |
172 | int idx = 0; | |
173 | ||
174 | /* Send the startchunk. Index start with 1 */ | |
175 | buf[0] = startchunk >> 8; | |
176 | buf[1] = startchunk & 0xff; | |
177 | sigma_write_register(WRITE_MEMROW, buf, 2); | |
178 | ||
179 | /* Read the DRAM */ | |
180 | buf[idx++] = REG_DRAM_BLOCK; | |
181 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
182 | ||
183 | for (i = 0; i < numchunks; ++i) { | |
184 | /* Alternate bit to copy from dram to cache */ | |
185 | if (i != numchunks-1) | |
186 | buf[idx++] = REG_DRAM_BLOCK | (((i+1) % 2) << 4); | |
187 | ||
188 | buf[idx++] = REG_DRAM_BLOCK_DATA | ((i % 2) << 4); | |
189 | ||
190 | if (i != numchunks-1) | |
191 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
192 | } | |
193 | ||
194 | sigma_write(buf, idx); | |
195 | ||
196 | return sigma_read(data, numchunks * CHUNK_SIZE); | |
197 | } | |
198 | ||
199 | ||
200 | /* Generate the bitbang stream for programming the FPGA */ | |
201 | static int bin2bitbang(const char *filename, | |
202 | unsigned char **buf, size_t* buf_size) | |
203 | { | |
204 | FILE *f = fopen(filename, "r"); | |
205 | long file_size; | |
206 | unsigned long offset = 0; | |
207 | unsigned char *p; | |
208 | uint8_t *compressed_buf, *firmware; | |
209 | uLongf csize, fwsize; | |
210 | const int buffer_size = 65536; | |
211 | size_t i; | |
212 | int c, ret; | |
213 | ||
214 | if (!f) { | |
215 | g_warning("fopen(\"%s\", \"r\")", filename); | |
216 | return -1; | |
217 | } | |
218 | ||
219 | if (-1 == fseek(f, 0, SEEK_END)) { | |
220 | g_warning("fseek on %s failed", filename); | |
221 | fclose(f); | |
222 | return -1; | |
223 | } | |
224 | ||
225 | file_size = ftell(f); | |
226 | ||
227 | fseek(f, 0, SEEK_SET); | |
228 | ||
229 | ||
230 | compressed_buf = g_malloc(file_size); | |
231 | firmware = g_malloc(buffer_size); | |
232 | ||
233 | if (!compressed_buf || !firmware) { | |
234 | g_warning("Error allocating buffers"); | |
235 | return -1; | |
236 | } | |
237 | ||
238 | uint32_t imm = 0x3f6df2ab; | |
239 | csize = 0; | |
240 | while ((c = getc(f)) != EOF) { | |
241 | imm = (imm + 0xa853753) % 177 + (imm * 0x8034052); | |
242 | compressed_buf[csize++] = c ^ imm; | |
243 | } | |
244 | fclose(f); | |
245 | ||
246 | fwsize = buffer_size; | |
247 | ret = uncompress(firmware, &fwsize, compressed_buf, csize); | |
248 | if (ret < 0) { | |
249 | g_free(compressed_buf); | |
250 | g_free(firmware); | |
251 | g_warning("Could not unpack Sigma firmware. (Error %d)\n", ret); | |
252 | return -1; | |
253 | } | |
254 | ||
255 | g_free(compressed_buf); | |
256 | ||
257 | *buf_size = fwsize * 2 * 8; | |
258 | ||
259 | *buf = p = (unsigned char*) g_malloc(*buf_size); | |
260 | ||
261 | if (!p) { | |
262 | g_warning("Error allocating buffers"); | |
263 | return -1; | |
264 | } | |
265 | ||
266 | for (i = 0; i < fwsize; ++i) { | |
267 | int bit; | |
268 | for (bit = 7; bit >= 0; --bit) { | |
269 | int v = firmware[i] & 1 << bit ? 0x40 : 0x00; | |
270 | p[offset++] = v | 0x01; | |
271 | p[offset++] = v; | |
272 | } | |
273 | } | |
274 | ||
275 | g_free(firmware); | |
276 | ||
277 | if (offset != *buf_size) { | |
278 | g_free(*buf); | |
279 | g_warning("Error reading firmware %s " | |
280 | "offset=%ld, file_size=%ld, buf_size=%zd\n", | |
281 | filename, offset, file_size, *buf_size); | |
282 | ||
283 | return -1; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | static int hw_init(char *deviceinfo) | |
290 | { | |
291 | struct sigrok_device_instance *sdi; | |
292 | ||
293 | deviceinfo = deviceinfo; | |
294 | ||
295 | ftdi_init(&ftdic); | |
296 | ||
297 | /* Look for SIGMAs */ | |
298 | if (ftdi_usb_open_desc(&ftdic, USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL) < 0) | |
299 | return 0; | |
300 | ||
301 | /* Register SIGMA device */ | |
302 | sdi = sigrok_device_instance_new(0, ST_INITIALIZING, | |
303 | USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION); | |
304 | if (!sdi) | |
305 | return 0; | |
306 | ||
307 | device_instances = g_slist_append(device_instances, sdi); | |
308 | ||
309 | /* We will open the device again when we need it */ | |
310 | ftdi_usb_close(&ftdic); | |
311 | ||
312 | return 1; | |
313 | } | |
314 | ||
315 | ||
316 | static int hw_opendev(int device_index) | |
317 | { | |
318 | int ret; | |
319 | unsigned char *buf; | |
320 | unsigned char pins; | |
321 | size_t buf_size; | |
322 | struct sigrok_device_instance *sdi; | |
323 | unsigned char result[32]; | |
324 | ||
325 | /* Make sure it's an ASIX SIGMA */ | |
326 | if ((ret = ftdi_usb_open_desc(&ftdic, | |
327 | USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) { | |
328 | ||
329 | g_warning("ftdi_usb_open failed: %s", | |
330 | ftdi_get_error_string(&ftdic)); | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | if ((ret = ftdi_set_bitmode(&ftdic, 0xdf, BITMODE_BITBANG)) < 0) { | |
336 | g_warning("ftdi_set_bitmode failed: %s", | |
337 | ftdi_get_error_string(&ftdic)); | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | /* Four times the speed of sigmalogan - Works well */ | |
343 | if ((ret = ftdi_set_baudrate(&ftdic, 750000)) < 0) { | |
344 | g_warning("ftdi_set_baudrate failed: %s", | |
345 | ftdi_get_error_string(&ftdic)); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | /* Force the FPGA to reboot */ | |
351 | unsigned char suicide[] = { | |
352 | 0x84, 0x84, 0x88, 0x84, 0x88, 0x84, 0x88, 0x84, | |
353 | }; | |
354 | ||
355 | sigma_write(suicide, sizeof(suicide)); | |
356 | sigma_write(suicide, sizeof(suicide)); | |
357 | sigma_write(suicide, sizeof(suicide)); | |
358 | sigma_write(suicide, sizeof(suicide)); | |
359 | ||
360 | /* Prepare to upload firmware (FPGA specific) */ | |
361 | unsigned char init[] = { | |
362 | 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 | |
363 | }; | |
364 | ||
365 | sigma_write(init, sizeof(init)); | |
366 | ||
367 | ftdi_usb_purge_buffers(&ftdic); | |
368 | ||
369 | /* Wait until the FPGA asserts INIT_B */ | |
370 | while (1) { | |
371 | ret = sigma_read(result, 1); | |
372 | if (result[0] & 0x20) | |
373 | break; | |
374 | } | |
375 | ||
376 | /* Prepare firmware */ | |
377 | if (-1 == bin2bitbang(FIRMWARE, &buf, &buf_size)) { | |
378 | g_warning("An error occured while reading the firmware: %s", | |
379 | FIRMWARE); | |
380 | ||
381 | return SIGROK_ERR; | |
382 | } | |
383 | ||
384 | /* Upload firmare */ | |
385 | sigma_write(buf, buf_size); | |
386 | ||
387 | g_free(buf); | |
388 | ||
389 | if ((ret = ftdi_set_bitmode(&ftdic, 0x00, BITMODE_RESET)) < 0) { | |
390 | g_warning("ftdi_set_bitmode failed: %s", | |
391 | ftdi_get_error_string(&ftdic)); | |
392 | ||
393 | return SIGROK_ERR; | |
394 | } | |
395 | ||
396 | ftdi_usb_purge_buffers(&ftdic); | |
397 | ||
398 | /* Discard garbage */ | |
399 | while (1 == sigma_read(&pins, 1)) | |
400 | ; | |
401 | ||
402 | /* Initialize the logic analyzer mode */ | |
403 | unsigned char logic_mode_start[] = { | |
404 | 0x00, 0x40, 0x0f, 0x25, 0x35, 0x40, | |
405 | 0x2a, 0x3a, 0x40, 0x03, 0x20, 0x38 | |
406 | }; | |
407 | ||
408 | sigma_write(logic_mode_start, sizeof(logic_mode_start)); | |
409 | ||
410 | /* Expect a 3 byte reply */ | |
411 | ret = sigma_read(result, 3); | |
412 | if (ret != 3 || | |
413 | result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) { | |
414 | ||
415 | g_warning("Sigma configuration failed. Invalid reply received."); | |
416 | return SIGROK_ERR; | |
417 | } | |
418 | ||
419 | /* Works like a charm */ | |
420 | ||
421 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
422 | return SIGROK_ERR; | |
423 | ||
424 | sdi->status = ST_ACTIVE; | |
425 | ||
426 | g_message("Firmware uploaded"); | |
427 | ||
428 | return SIGROK_OK; | |
429 | } | |
430 | ||
431 | ||
432 | static void hw_closedev(int device_index) | |
433 | { | |
434 | device_index = device_index; | |
435 | ||
436 | ftdi_usb_close(&ftdic); | |
437 | } | |
438 | ||
439 | ||
440 | static void hw_cleanup(void) | |
441 | { | |
442 | } | |
443 | ||
444 | ||
445 | static void *hw_get_device_info(int device_index, int device_info_id) | |
446 | { | |
447 | struct sigrok_device_instance *sdi; | |
448 | void *info = NULL; | |
449 | ||
450 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) { | |
451 | fprintf(stderr, "It's NULL.\n"); | |
452 | return NULL; | |
453 | } | |
454 | ||
455 | switch (device_info_id) { | |
456 | case DI_INSTANCE: | |
457 | info = sdi; | |
458 | break; | |
459 | case DI_NUM_PROBES: | |
460 | info = GINT_TO_POINTER(4); | |
461 | break; | |
462 | case DI_SAMPLERATES: | |
463 | info = &samplerates; | |
464 | break; | |
465 | case DI_TRIGGER_TYPES: | |
466 | info = 0;//TRIGGER_TYPES; | |
467 | break; | |
468 | case DI_CUR_SAMPLERATE: | |
469 | info = &cur_samplerate; | |
470 | break; | |
471 | } | |
472 | ||
473 | return info; | |
474 | } | |
475 | ||
476 | ||
477 | static int hw_get_status(int device_index) | |
478 | { | |
479 | struct sigrok_device_instance *sdi; | |
480 | ||
481 | sdi = get_sigrok_device_instance(device_instances, device_index); | |
482 | if (sdi) | |
483 | return sdi->status; | |
484 | else | |
485 | return ST_NOT_FOUND; | |
486 | } | |
487 | ||
488 | ||
489 | static int *hw_get_capabilities(void) | |
490 | { | |
491 | return capabilities; | |
492 | } | |
493 | ||
494 | static int hw_set_configuration(int device_index, int capability, void *value) | |
495 | { | |
496 | struct sigrok_device_instance *sdi; | |
497 | int ret; | |
498 | uint64_t *tmp_u64; | |
499 | ||
500 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
501 | return SIGROK_ERR; | |
502 | ||
503 | if (capability == HWCAP_SAMPLERATE) { | |
504 | tmp_u64 = (uint64_t*) value; | |
505 | /* Only 200 MHz implemented */ | |
506 | ret = SIGROK_OK; | |
507 | } else if (capability == HWCAP_PROBECONFIG) { | |
508 | ret = SIGROK_OK; | |
509 | } else if (capability == HWCAP_LIMIT_MSEC) { | |
510 | limit_msec = strtoull(value, NULL, 10); | |
511 | ret = SIGROK_OK; | |
512 | } else { | |
513 | ret = SIGROK_ERR; | |
514 | } | |
515 | ||
516 | return ret; | |
517 | } | |
518 | ||
519 | ||
520 | /* | |
521 | Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster. | |
522 | Each event is 20ns apart, and can contain multiple samples. | |
523 | For 200 MHz, an event contains 4 samples for each channel, spread 5 ns apart | |
524 | */ | |
525 | static int decode_chunk_ts(uint8_t *buf, uint16_t *lastts, | |
526 | uint8_t *lastsample, void *user_data) | |
527 | { | |
528 | const int samples_per_event = 4; | |
529 | uint16_t tsdiff; | |
530 | uint16_t ts; | |
531 | ||
532 | uint8_t samples[65536 * samples_per_event]; | |
533 | ||
534 | struct datafeed_packet packet; | |
535 | ||
536 | int i, j, k; | |
537 | size_t n = 0; | |
538 | ||
539 | int clustersize = EVENTS_PER_CLUSTER * samples_per_event; /* 4 for 200 MHz */ | |
540 | ||
541 | /* For each ts */ | |
542 | for (i = 0; i < 64; ++i) { | |
543 | ts = *(uint16_t*) &buf[i*16]; | |
544 | tsdiff = ts - *lastts; | |
545 | *lastts = ts; | |
546 | ||
547 | /* Pad last sample up to current point */ | |
548 | int numpad = tsdiff * samples_per_event - clustersize; | |
549 | if (numpad > 0) { | |
550 | memset(samples, *lastsample, | |
551 | tsdiff*samples_per_event - clustersize); | |
552 | n = tsdiff*samples_per_event - clustersize; | |
553 | } | |
554 | ||
555 | uint16_t *event = (uint16_t*) &buf[i*16+2]; | |
556 | ||
557 | /* For each sample in cluster */ | |
558 | for (j = 0; j < 7; ++j) { | |
559 | for (k = 0; k < samples_per_event; ++k) { | |
560 | /* Extract samples from bytestream. | |
561 | Samples are packed together in a short */ | |
562 | samples[n++] = | |
563 | ((!!(event[j] & (1 << (k+0x0)))) << 0) | | |
564 | ((!!(event[j] & (1 << (k+0x4)))) << 1) | | |
565 | ((!!(event[j] & (1 << (k+0x8)))) << 2) | | |
566 | ((!!(event[j] & (1 << (k+0xc)))) << 3); | |
567 | } | |
568 | } | |
569 | ||
570 | *lastsample = samples[n-1]; | |
571 | ||
572 | /* Send to sigrok */ | |
573 | size_t sent = 0; | |
574 | while (sent < n) { | |
575 | int tosend = MIN(4096, n-sent); | |
576 | ||
577 | packet.type = DF_LOGIC8; | |
578 | packet.length = tosend; | |
579 | packet.payload = samples+sent; | |
580 | session_bus(user_data, &packet); | |
581 | ||
582 | sent += tosend; | |
583 | } | |
584 | } | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | static int receive_data(int fd, int revents, void *user_data) | |
590 | { | |
591 | struct datafeed_packet packet; | |
592 | ||
593 | const int chunks_per_read = 32; | |
594 | unsigned char buf[chunks_per_read * CHUNK_SIZE]; | |
595 | int bufsz; | |
596 | ||
597 | uint32_t triggerpos, stoppos; | |
598 | int numchunks; | |
599 | struct timeval tv; | |
600 | uint32_t running_msec; | |
601 | ||
602 | uint16_t lastts = 0; | |
603 | uint8_t lastsample = 0; | |
604 | int curchunk, i; | |
605 | ||
606 | fd = fd; | |
607 | revents = revents; | |
608 | ||
609 | /* Get the current position */ | |
610 | sigma_read_pos(&stoppos, &triggerpos); | |
611 | numchunks = stoppos / 512; | |
612 | ||
613 | /* Check if the has expired, or memory is full */ | |
614 | gettimeofday(&tv, 0); | |
615 | running_msec = (tv.tv_sec - start_tv.tv_sec) * 1000 + | |
616 | (tv.tv_usec - start_tv.tv_usec) / 1000; | |
617 | ||
618 | if (running_msec < limit_msec && numchunks < 32767) | |
619 | return FALSE; | |
620 | ||
621 | /* Stop Acqusition */ | |
622 | sigma_set_register(WRITE_MODE, 0x11); | |
623 | ||
624 | /* Set SDRAM Read Enable */ | |
625 | sigma_set_register(WRITE_MODE, 0x02); | |
626 | ||
627 | /* Get the current position */ | |
628 | sigma_read_pos(&stoppos, &triggerpos); | |
629 | ||
630 | /* Download sample data */ | |
631 | for (curchunk = 0; curchunk < numchunks;) { | |
632 | int newchunks = MIN(chunks_per_read, numchunks - curchunk); | |
633 | ||
634 | g_message("Downloading sample data: %.0f %%", | |
635 | 100.0 * curchunk / numchunks); | |
636 | ||
637 | bufsz = sigma_read_dram(curchunk, newchunks, buf); | |
638 | ||
639 | /* Find first ts */ | |
640 | if (curchunk == 0) { | |
641 | lastts = *(uint16_t*) buf - 1; | |
642 | } | |
643 | ||
644 | /* Decode chunks and send them to sigrok */ | |
645 | for (i = 0; i < newchunks; ++i) { | |
646 | decode_chunk_ts(buf + (i * CHUNK_SIZE), | |
647 | &lastts, &lastsample, user_data); | |
648 | } | |
649 | ||
650 | curchunk += newchunks; | |
651 | } | |
652 | ||
653 | /* End of data */ | |
654 | packet.type = DF_END; | |
655 | packet.length = 0; | |
656 | session_bus(user_data, &packet); | |
657 | ||
658 | return TRUE; | |
659 | } | |
660 | ||
661 | static int hw_start_acquisition(int device_index, gpointer session_device_id) | |
662 | { | |
663 | struct sigrok_device_instance *sdi; | |
664 | struct datafeed_packet packet; | |
665 | struct datafeed_header header; | |
666 | ||
667 | session_device_id = session_device_id; | |
668 | ||
669 | if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) | |
670 | return SIGROK_ERR; | |
671 | ||
672 | device_index = device_index; | |
673 | ||
674 | /* Setup trigger (by trigger-in) */ | |
675 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20); | |
676 | ||
677 | /* More trigger setup */ | |
678 | uint8_t trigger_option[2] = { 0x38, 0x00 }; | |
679 | sigma_write_register(WRITE_TRIGGER_OPTION, | |
680 | trigger_option, sizeof(trigger_option)); | |
681 | ||
682 | /* Trigger normal (falling edge) */ | |
683 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x08); | |
684 | ||
685 | /* Enable pins (200 MHz, 4 pins) */ | |
686 | sigma_set_register(WRITE_CLOCK_SELECT, 0xf0); | |
687 | ||
688 | /* Setup maximum post trigger time */ | |
689 | sigma_set_register(WRITE_POST_TRIGGER, 0xff); | |
690 | ||
691 | /* Start Acqusition (Software trigger start) */ | |
692 | gettimeofday(&start_tv, 0); | |
693 | sigma_set_register(WRITE_MODE, 0x0d); | |
694 | ||
695 | ||
696 | /* Add capture source */ | |
697 | source_add(0, G_IO_IN, 10, receive_data, session_device_id); | |
698 | ||
699 | receive_data(0, 1, session_device_id); | |
700 | ||
701 | /* Send header packet to the session bus. */ | |
702 | packet.type = DF_HEADER; | |
703 | packet.length = sizeof(struct datafeed_header); | |
704 | packet.payload = &header; | |
705 | header.feed_version = 1; | |
706 | gettimeofday(&header.starttime, NULL); | |
707 | header.samplerate = cur_samplerate; | |
708 | header.protocol_id = PROTO_RAW; | |
709 | header.num_probes = 4; | |
710 | session_bus(session_device_id, &packet); | |
711 | ||
712 | return SIGROK_OK; | |
713 | } | |
714 | ||
715 | ||
716 | static void hw_stop_acquisition(int device_index, gpointer session_device_id) | |
717 | { | |
718 | device_index = device_index; | |
719 | session_device_id = session_device_id; | |
720 | ||
721 | /* Stop Acqusition */ | |
722 | sigma_set_register(WRITE_MODE, 0x11); | |
723 | ||
724 | // XXX Set some state to indicate that data should be sent to sigrok | |
725 | // Now, we just wait for timeout | |
726 | } | |
727 | ||
728 | ||
729 | ||
730 | struct device_plugin asix_sigma_plugin_info = { | |
731 | "asix-sigma", | |
732 | 1, | |
733 | hw_init, | |
734 | hw_cleanup, | |
735 | ||
736 | hw_opendev, | |
737 | hw_closedev, | |
738 | hw_get_device_info, | |
739 | hw_get_status, | |
740 | hw_get_capabilities, | |
741 | hw_set_configuration, | |
742 | hw_start_acquisition, | |
743 | hw_stop_acquisition | |
744 | }; | |
745 | ||
746 | // vim:noexpandtab:ts=8 sts=8 sw=8 |