11 #include "stlink-common.h"
12 #include "stlink-usb.h"
13 #include "uglylogging.h"
15 /* code from bsd timersub.h
16 http://www.gnu-darwin.org/www001/src/ports/net/libevnet/work/libevnet-0.3.8/libnostd/bsd/sys/time/timersub.h.html
19 #define timersub(a, b, r) do { \
20 (r)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
21 (r)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
22 if ((r)->tv_usec < 0) { \
24 (r)->tv_usec += 1000000; \
29 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};
31 void _stlink_usb_close(stlink_t* sl) {
32 struct stlink_libusb * const handle = sl->backend_data;
33 // maybe we couldn't even get the usb device?
35 if (handle->req_trans != NULL)
36 libusb_free_transfer(handle->req_trans);
38 if (handle->rep_trans != NULL)
39 libusb_free_transfer(handle->rep_trans);
41 if (handle->usb_handle != NULL) {
42 libusb_close(handle->usb_handle);
45 libusb_exit(handle->libusb_ctx);
52 #define TRANS_FLAGS_IS_DONE (1 << 0)
53 #define TRANS_FLAGS_HAS_ERROR (1 << 1)
54 volatile unsigned long flags;
61 static void LIBUSB_CALL on_trans_done(struct libusb_transfer * trans) {
62 struct trans_ctx * const ctx = trans->user_data;
64 if (trans->status != LIBUSB_TRANSFER_COMPLETED)
65 ctx->flags |= TRANS_FLAGS_HAS_ERROR;
67 ctx->flags |= TRANS_FLAGS_IS_DONE;
70 int submit_wait(struct stlink_libusb *slu, struct libusb_transfer * trans) {
74 struct trans_ctx trans_ctx;
75 enum libusb_error error;
79 /* brief intrusion inside the libusb interface */
80 trans->callback = on_trans_done;
81 trans->user_data = &trans_ctx;
83 if ((error = libusb_submit_transfer(trans))) {
84 printf("libusb_submit_transfer(%d)\n", error);
88 gettimeofday(&start, NULL);
90 while (trans_ctx.flags == 0) {
91 struct timeval timeout;
94 if (libusb_handle_events_timeout(slu->libusb_ctx, &timeout)) {
95 printf("libusb_handle_events()\n");
99 gettimeofday(&now, NULL);
100 timersub(&now, &start, &diff);
101 if (diff.tv_sec >= 3) {
102 printf("libusb_handle_events() timeout\n");
107 if (trans_ctx.flags & TRANS_FLAGS_HAS_ERROR) {
108 printf("libusb_handle_events() | has_error\n");
115 ssize_t send_recv(struct stlink_libusb* handle, int terminate,
116 unsigned char* txbuf, size_t txsize,
117 unsigned char* rxbuf, size_t rxsize) {
118 /* note: txbuf and rxbuf can point to the same area */
121 libusb_fill_bulk_transfer(handle->req_trans, handle->usb_handle,
128 if (submit_wait(handle, handle->req_trans)) return -1;
133 /* read the response */
135 libusb_fill_bulk_transfer(handle->rep_trans, handle->usb_handle,
136 handle->ep_rep, rxbuf, rxsize, NULL, NULL, 0);
138 if (submit_wait(handle, handle->rep_trans)) return -1;
139 res = handle->rep_trans->actual_length;
142 if ((handle->protocoll == 1) && terminate) {
143 /* Read the SG reply */
144 unsigned char sg_buf[13];
145 libusb_fill_bulk_transfer
146 (handle->rep_trans, handle->usb_handle,
147 handle->ep_rep, sg_buf, 13, NULL, NULL, 0);
148 res = submit_wait(handle, handle->rep_trans);
149 /* The STLink doesn't seem to evaluate the sequence number */
150 handle->sg_transfer_idx++;
154 return handle->rep_trans->actual_length;
157 static inline int send_only
158 (struct stlink_libusb* handle, int terminate,
159 unsigned char* txbuf, size_t txsize) {
160 return send_recv(handle, terminate, txbuf, txsize, NULL, 0);
164 static int fill_command
165 (stlink_t * sl, enum SCSI_Generic_Direction dir, uint32_t len) {
166 struct stlink_libusb * const slu = sl->backend_data;
167 unsigned char* const cmd = sl->c_buf;
169 memset(cmd, 0, sizeof (sl->c_buf));
170 if(slu->protocoll == 1) {
175 write_uint32(&cmd[i], slu->sg_transfer_idx);
176 write_uint32(&cmd[i + 4], len);
178 cmd[i++] = (dir == SG_DXFER_FROM_DEV)?0x80:0;
179 cmd[i++] = 0; /* Logical unit */
180 cmd[i++] = 0xa; /* Command length */
185 void _stlink_usb_version(stlink_t *sl) {
186 struct stlink_libusb * const slu = sl->backend_data;
187 unsigned char* const data = sl->q_buf;
188 unsigned char* const cmd = sl->c_buf;
190 uint32_t rep_len = 6;
191 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
193 cmd[i++] = STLINK_GET_VERSION;
195 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
197 printf("[!] send_recv\n");
202 int32_t _stlink_usb_target_voltage(stlink_t *sl) {
203 struct stlink_libusb * const slu = sl->backend_data;
204 unsigned char* const rdata = sl->q_buf;
205 unsigned char* const cmd = sl->c_buf;
207 uint32_t rep_len = 8;
208 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
209 uint32_t factor, reading;
212 cmd[i++] = STLINK_GET_TARGET_VOLTAGE;
214 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
216 printf("[!] send_recv\n");
218 } else if (size != 8) {
219 printf("[!] wrong length\n");
223 factor = (rdata[3] << 24) | (rdata[2] << 16) | (rdata[1] << 8) | (rdata[0] << 0);
224 reading = (rdata[7] << 24) | (rdata[6] << 16) | (rdata[5] << 8) | (rdata[4] << 0);
225 voltage = 2400 * reading / factor;
230 uint32_t _stlink_usb_read_debug32(stlink_t *sl, uint32_t addr) {
231 struct stlink_libusb * const slu = sl->backend_data;
232 unsigned char* const rdata = sl->q_buf;
233 unsigned char* const cmd = sl->c_buf;
235 const int rep_len = 8;
237 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
238 cmd[i++] = STLINK_DEBUG_COMMAND;
239 cmd[i++] = STLINK_JTAG_READDEBUG_32BIT;
240 write_uint32(&cmd[i], addr);
241 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
243 printf("[!] send_recv\n");
246 return read_uint32(rdata, 4);
249 void _stlink_usb_write_debug32(stlink_t *sl, uint32_t addr, uint32_t data) {
250 struct stlink_libusb * const slu = sl->backend_data;
251 unsigned char* const rdata = sl->q_buf;
252 unsigned char* const cmd = sl->c_buf;
254 const int rep_len = 2;
256 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
257 cmd[i++] = STLINK_DEBUG_COMMAND;
258 cmd[i++] = STLINK_JTAG_WRITEDEBUG_32BIT;
259 write_uint32(&cmd[i], addr);
260 write_uint32(&cmd[i + 4], data);
261 size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
263 printf("[!] send_recv\n");
268 void _stlink_usb_write_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
269 struct stlink_libusb * const slu = sl->backend_data;
270 unsigned char* const data = sl->q_buf;
271 unsigned char* const cmd = sl->c_buf;
273 int i = fill_command(sl, SG_DXFER_TO_DEV, len);
274 cmd[i++] = STLINK_DEBUG_COMMAND;
275 cmd[i++] = STLINK_DEBUG_WRITEMEM_32BIT;
276 write_uint32(&cmd[i], addr);
277 write_uint16(&cmd[i + 4], len);
278 send_only(slu, 0, cmd, slu->cmd_len);
280 send_only(slu, 1, data, len);
283 void _stlink_usb_write_mem8(stlink_t *sl, uint32_t addr, uint16_t len) {
284 struct stlink_libusb * const slu = sl->backend_data;
285 unsigned char* const data = sl->q_buf;
286 unsigned char* const cmd = sl->c_buf;
288 int i = fill_command(sl, SG_DXFER_TO_DEV, 0);
289 cmd[i++] = STLINK_DEBUG_COMMAND;
290 cmd[i++] = STLINK_DEBUG_WRITEMEM_8BIT;
291 write_uint32(&cmd[i], addr);
292 write_uint16(&cmd[i + 4], len);
293 send_only(slu, 0, cmd, slu->cmd_len);
294 send_only(slu, 1, data, len);
298 int _stlink_usb_current_mode(stlink_t * sl) {
299 struct stlink_libusb * const slu = sl->backend_data;
300 unsigned char* const cmd = sl->c_buf;
301 unsigned char* const data = sl->q_buf;
304 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
306 cmd[i++] = STLINK_GET_CURRENT_MODE;
307 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
309 printf("[!] send_recv\n");
315 void _stlink_usb_core_id(stlink_t * sl) {
316 struct stlink_libusb * const slu = sl->backend_data;
317 unsigned char* const cmd = sl->c_buf;
318 unsigned char* const data = sl->q_buf;
321 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
323 cmd[i++] = STLINK_DEBUG_COMMAND;
324 cmd[i++] = STLINK_DEBUG_READCOREID;
326 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
328 printf("[!] send_recv\n");
332 sl->core_id = read_uint32(data, 0);
335 void _stlink_usb_status(stlink_t * sl) {
336 struct stlink_libusb * const slu = sl->backend_data;
337 unsigned char* const data = sl->q_buf;
338 unsigned char* const cmd = sl->c_buf;
341 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
343 cmd[i++] = STLINK_DEBUG_COMMAND;
344 cmd[i++] = STLINK_DEBUG_GETSTATUS;
346 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
348 printf("[!] send_recv\n");
353 void _stlink_usb_force_debug(stlink_t *sl) {
354 struct stlink_libusb *slu = sl->backend_data;
355 unsigned char* const data = sl->q_buf;
356 unsigned char* const cmd = sl->c_buf;
359 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
361 cmd[i++] = STLINK_DEBUG_COMMAND;
362 cmd[i++] = STLINK_DEBUG_FORCEDEBUG;
363 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
365 printf("[!] send_recv\n");
370 void _stlink_usb_enter_swd_mode(stlink_t * sl) {
371 struct stlink_libusb * const slu = sl->backend_data;
372 unsigned char* const cmd = sl->c_buf;
374 const int rep_len = 0;
375 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
377 cmd[i++] = STLINK_DEBUG_COMMAND;
378 cmd[i++] = STLINK_DEBUG_ENTER;
379 cmd[i++] = STLINK_DEBUG_ENTER_SWD;
381 size = send_only(slu, 1, cmd, slu->cmd_len);
383 printf("[!] send_recv\n");
388 void _stlink_usb_exit_dfu_mode(stlink_t* sl) {
389 struct stlink_libusb * const slu = sl->backend_data;
390 unsigned char* const cmd = sl->c_buf;
392 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
394 cmd[i++] = STLINK_DFU_COMMAND;
395 cmd[i++] = STLINK_DFU_EXIT;
397 size = send_only(slu, 1, cmd, slu->cmd_len);
399 printf("[!] send_recv\n");
405 * TODO - not convinced this does anything...
408 void _stlink_usb_reset(stlink_t * sl) {
409 struct stlink_libusb * const slu = sl->backend_data;
410 unsigned char* const data = sl->q_buf;
411 unsigned char* const cmd = sl->c_buf;
414 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
416 cmd[i++] = STLINK_DEBUG_COMMAND;
417 cmd[i++] = STLINK_DEBUG_RESETSYS;
419 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
421 printf("[!] send_recv\n");
427 void _stlink_usb_jtag_reset(stlink_t * sl, int value) {
428 struct stlink_libusb * const slu = sl->backend_data;
429 unsigned char* const data = sl->q_buf;
430 unsigned char* const cmd = sl->c_buf;
433 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
435 cmd[i++] = STLINK_DEBUG_COMMAND;
436 cmd[i++] = STLINK_JTAG_DRIVE_NRST;
439 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
441 printf("[!] send_recv\n");
447 void _stlink_usb_step(stlink_t* sl) {
448 struct stlink_libusb * const slu = sl->backend_data;
449 unsigned char* const data = sl->q_buf;
450 unsigned char* const cmd = sl->c_buf;
453 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
455 cmd[i++] = STLINK_DEBUG_COMMAND;
456 cmd[i++] = STLINK_DEBUG_STEPCORE;
458 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
460 printf("[!] send_recv\n");
466 * This seems to do a good job of restarting things from the beginning?
469 void _stlink_usb_run(stlink_t* sl) {
470 struct stlink_libusb * const slu = sl->backend_data;
471 unsigned char* const data = sl->q_buf;
472 unsigned char* const cmd = sl->c_buf;
475 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
477 cmd[i++] = STLINK_DEBUG_COMMAND;
478 cmd[i++] = STLINK_DEBUG_RUNCORE;
480 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
482 printf("[!] send_recv\n");
487 void _stlink_usb_exit_debug_mode(stlink_t *sl) {
488 struct stlink_libusb * const slu = sl->backend_data;
489 unsigned char* const cmd = sl->c_buf;
491 int i = fill_command(sl, SG_DXFER_FROM_DEV, 0);
493 cmd[i++] = STLINK_DEBUG_COMMAND;
494 cmd[i++] = STLINK_DEBUG_EXIT;
496 size = send_only(slu, 1, cmd, slu->cmd_len);
498 printf("[!] send_only\n");
503 void _stlink_usb_read_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
504 struct stlink_libusb * const slu = sl->backend_data;
505 unsigned char* const data = sl->q_buf;
506 unsigned char* const cmd = sl->c_buf;
508 int i = fill_command(sl, SG_DXFER_FROM_DEV, len);
510 cmd[i++] = STLINK_DEBUG_COMMAND;
511 cmd[i++] = STLINK_DEBUG_READMEM_32BIT;
512 write_uint32(&cmd[i], addr);
513 write_uint16(&cmd[i + 4], len);
515 size = send_recv(slu, 1, cmd, slu->cmd_len, data, len);
517 printf("[!] send_recv\n");
521 sl->q_len = (size_t) size;
523 stlink_print_data(sl);
526 void _stlink_usb_read_all_regs(stlink_t *sl, reg *regp) {
527 struct stlink_libusb * const slu = sl->backend_data;
528 unsigned char* const cmd = sl->c_buf;
529 unsigned char* const data = sl->q_buf;
531 uint32_t rep_len = 84;
532 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
534 cmd[i++] = STLINK_DEBUG_COMMAND;
535 cmd[i++] = STLINK_DEBUG_READALLREGS;
536 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
538 printf("[!] send_recv\n");
541 sl->q_len = (size_t) size;
542 stlink_print_data(sl);
544 regp->r[i]= read_uint32(sl->q_buf, i*4);
545 regp->xpsr = read_uint32(sl->q_buf, 64);
546 regp->main_sp = read_uint32(sl->q_buf, 68);
547 regp->process_sp = read_uint32(sl->q_buf, 72);
548 regp->rw = read_uint32(sl->q_buf, 76);
549 regp->rw2 = read_uint32(sl->q_buf, 80);
553 DLOG("xpsr = 0x%08x\n", read_uint32(sl->q_buf, 64));
554 DLOG("main_sp = 0x%08x\n", read_uint32(sl->q_buf, 68));
555 DLOG("process_sp = 0x%08x\n", read_uint32(sl->q_buf, 72));
556 DLOG("rw = 0x%08x\n", read_uint32(sl->q_buf, 76));
557 DLOG("rw2 = 0x%08x\n", read_uint32(sl->q_buf, 80));
560 void _stlink_usb_read_reg(stlink_t *sl, int r_idx, reg *regp) {
561 struct stlink_libusb * const slu = sl->backend_data;
562 unsigned char* const data = sl->q_buf;
563 unsigned char* const cmd = sl->c_buf;
566 uint32_t rep_len = 4;
567 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
569 cmd[i++] = STLINK_DEBUG_COMMAND;
570 cmd[i++] = STLINK_DEBUG_READREG;
571 cmd[i++] = (uint8_t) r_idx;
572 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
574 printf("[!] send_recv\n");
577 sl->q_len = (size_t) size;
578 stlink_print_data(sl);
579 r = read_uint32(sl->q_buf, 0);
580 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
590 regp->process_sp = r;
593 regp->rw = r; /* XXX ?(primask, basemask etc.) */
596 regp->rw2 = r; /* XXX ?(primask, basemask etc.) */
603 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
604 void _stlink_usb_read_unsupported_reg(stlink_t *sl, int r_idx, reg *regp) {
607 sl->q_buf[0] = (unsigned char) r_idx;
608 for (int i = 1; i < 4; i++) {
612 _stlink_usb_write_mem32(sl, DCRSR, 4);
613 _stlink_usb_read_mem32(sl, DCRDR, 4);
615 r = read_uint32(sl->q_buf, 0);
616 DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
620 regp->primask = (uint8_t) (r & 0xFF);
621 regp->basepri = (uint8_t) ((r>>8) & 0xFF);
622 regp->faultmask = (uint8_t) ((r>>16) & 0xFF);
623 regp->control = (uint8_t) ((r>>24) & 0xFF);
629 regp->s[r_idx - 0x40] = r;
634 void _stlink_usb_read_all_unsupported_regs(stlink_t *sl, reg *regp) {
635 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
636 _stlink_usb_read_unsupported_reg(sl, 0x21, regp);
638 for (int i = 0; i < 32; i++) {
639 _stlink_usb_read_unsupported_reg(sl, 0x40+i, regp);
643 /* See section C1.6 of the ARMv7-M Architecture Reference Manual */
644 void _stlink_usb_write_unsupported_reg(stlink_t *sl, uint32_t val, int r_idx, reg *regp) {
645 if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
646 /* These are held in the same register */
647 _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
649 val = (uint8_t) (val>>24);
652 case 0x1C: /* control */
653 val = (((uint32_t) val) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
655 case 0x1D: /* faultmask */
656 val = (((uint32_t) regp->control) << 24) | (((uint32_t) val) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
658 case 0x1E: /* basepri */
659 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) val) << 8) | ((uint32_t) regp->primask);
661 case 0x1F: /* primask */
662 val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) val);
669 write_uint32(sl->q_buf, val);
671 _stlink_usb_write_mem32(sl, DCRDR, 4);
673 sl->q_buf[0] = (unsigned char) r_idx;
678 _stlink_usb_write_mem32(sl, DCRSR, 4);
681 void _stlink_usb_write_reg(stlink_t *sl, uint32_t reg, int idx) {
682 struct stlink_libusb * const slu = sl->backend_data;
683 unsigned char* const data = sl->q_buf;
684 unsigned char* const cmd = sl->c_buf;
686 uint32_t rep_len = 2;
687 int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
689 cmd[i++] = STLINK_DEBUG_COMMAND;
690 cmd[i++] = STLINK_DEBUG_WRITEREG;
692 write_uint32(&cmd[i], reg);
693 size = send_recv(slu, 1, cmd, slu->cmd_len, data, rep_len);
695 printf("[!] send_recv\n");
698 sl->q_len = (size_t) size;
699 stlink_print_data(sl);
702 stlink_backend_t _stlink_usb_backend = {
704 _stlink_usb_exit_debug_mode,
705 _stlink_usb_enter_swd_mode,
706 NULL, // no enter_jtag_mode here...
707 _stlink_usb_exit_dfu_mode,
710 _stlink_usb_jtag_reset,
714 _stlink_usb_read_debug32,
715 _stlink_usb_read_mem32,
716 _stlink_usb_write_debug32,
717 _stlink_usb_write_mem32,
718 _stlink_usb_write_mem8,
719 _stlink_usb_read_all_regs,
720 _stlink_usb_read_reg,
721 _stlink_usb_read_all_unsupported_regs,
722 _stlink_usb_read_unsupported_reg,
723 _stlink_usb_write_unsupported_reg,
724 _stlink_usb_write_reg,
726 _stlink_usb_current_mode,
727 _stlink_usb_force_debug,
728 _stlink_usb_target_voltage
732 stlink_t* stlink_open_usb(const int verbose, int reset, char *p_usb_iserial) {
734 struct stlink_libusb* slu = NULL;
736 libusb_device** devs = NULL;
739 sl = malloc(sizeof (stlink_t));
740 slu = malloc(sizeof (struct stlink_libusb));
741 if (sl == NULL) goto on_error;
742 if (slu == NULL) goto on_error;
743 memset(sl, 0, sizeof (stlink_t));
744 memset(slu, 0, sizeof (struct stlink_libusb));
747 sl->backend = &_stlink_usb_backend;
748 sl->backend_data = slu;
750 sl->core_stat = STLINK_CORE_STAT_UNKNOWN;
751 if (libusb_init(&(slu->libusb_ctx))) {
752 WLOG("failed to init libusb context, wrong version of libraries?\n");
756 libusb_device **list;
757 int cnt = libusb_get_device_list(slu->libusb_ctx, &list);
758 struct libusb_device_descriptor desc;
762 char *device = getenv("STLINK_DEVICE");
764 char *c = strchr(device,':');
766 WLOG("STLINK_DEVICE must be <USB_BUS>:<USB_ADDR> format\n");
772 ILOG("bus %03d dev %03d\n",devBus, devAddr);
775 libusb_get_device_descriptor( list[cnt], &desc );
776 if (desc.idVendor!=USB_ST_VID) continue;
777 if (devBus && devAddr)
778 if ((libusb_get_bus_number(list[cnt])!=devBus) || (libusb_get_device_address(list[cnt])!=devAddr)) continue;
779 if ( (desc.idProduct == USB_STLINK_32L_PID) || (desc.idProduct == USB_STLINK_NUCLEO_PID) ){
780 if ((p_usb_iserial != NULL)){
781 unsigned char buffer[13];
782 struct libusb_device_handle* handle;
783 libusb_open(list[cnt], &handle);
784 libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, buffer, 13);
785 libusb_close(handle);
786 if (memcmp(p_usb_iserial,&buffer,12) == 0){
795 if (desc.idProduct == USB_STLINK_PID) {
802 WLOG ("Couldn't find %s ST-Link/V2 devices\n",(devBus && devAddr)?"matched":"any");
805 int error = libusb_open(list[cnt], &slu->usb_handle);
807 WLOG("Error %d (%s) opening ST-Link/V2 device %03d:%03d\n",
808 error, strerror (errno), libusb_get_bus_number(list[cnt]), libusb_get_device_address(list[cnt]));
813 libusb_free_device_list(list, 1);
816 if (libusb_kernel_driver_active(slu->usb_handle, 0) == 1) {
819 r = libusb_detach_kernel_driver(slu->usb_handle, 0);
821 WLOG("libusb_detach_kernel_driver(() error %s\n", strerror(-r));
822 goto on_libusb_error;
826 if (libusb_get_configuration(slu->usb_handle, &config)) {
827 /* this may fail for a previous configured device */
828 WLOG("libusb_get_configuration()\n");
829 goto on_libusb_error;
833 printf("setting new configuration (%d -> 1)\n", config);
834 if (libusb_set_configuration(slu->usb_handle, 1)) {
835 /* this may fail for a previous configured device */
836 WLOG("libusb_set_configuration() failed\n");
837 goto on_libusb_error;
841 if (libusb_claim_interface(slu->usb_handle, 0)) {
842 WLOG("libusb_claim_interface() failed\n");
843 goto on_libusb_error;
846 slu->req_trans = libusb_alloc_transfer(0);
847 if (slu->req_trans == NULL) {
848 WLOG("libusb_alloc_transfer failed\n");
849 goto on_libusb_error;
852 slu->rep_trans = libusb_alloc_transfer(0);
853 if (slu->rep_trans == NULL) {
854 WLOG("libusb_alloc_transfer failed\n");
855 goto on_libusb_error;
858 // TODO - could use the scanning techniq from stm8 code here...
859 slu->ep_rep = 1 /* ep rep */ | LIBUSB_ENDPOINT_IN;
860 if (desc.idProduct == USB_STLINK_NUCLEO_PID) {
861 slu->ep_req = 1 /* ep req */ | LIBUSB_ENDPOINT_OUT;
863 slu->ep_req = 2 /* ep req */ | LIBUSB_ENDPOINT_OUT;
866 slu->sg_transfer_idx = 0;
867 // TODO - never used at the moment, always CMD_SIZE
868 slu->cmd_len = (slu->protocoll == 1)? STLINK_SG_SIZE: STLINK_CMD_SIZE;
872 if (stlink_current_mode(sl) == STLINK_DEV_DFU_MODE) {
873 ILOG("-- exit_dfu_mode\n");
874 stlink_exit_dfu_mode(sl);
877 if (stlink_current_mode(sl) != STLINK_DEV_DEBUG_MODE) {
878 stlink_enter_swd_mode(sl);
886 error = stlink_load_device_params(sl);
890 libusb_free_device_list(devs, 1);
903 libusb_exit(slu->libusb_ctx);
904 if (sl != NULL) free(sl);
905 if (slu != NULL) free(slu);