10 #include <sys/types.h>
14 #include "stlink-common.h"
15 #include "uglylogging.h"
21 /* todo: stm32l15xxx flash memory, pm0062 manual */
23 /* stm32f FPEC flash controller interface, pm0063 manual */
24 // TODO - all of this needs to be abstracted out....
25 // STM32F05x is identical, based on RM0091 (DM00031936, Doc ID 018940 Rev 2, August 2012)
26 #define FLASH_REGS_ADDR 0x40022000
27 #define FLASH_REGS_SIZE 0x28
29 #define FLASH_ACR (FLASH_REGS_ADDR + 0x00)
30 #define FLASH_KEYR (FLASH_REGS_ADDR + 0x04)
31 #define FLASH_SR (FLASH_REGS_ADDR + 0x0c)
32 #define FLASH_CR (FLASH_REGS_ADDR + 0x10)
33 #define FLASH_AR (FLASH_REGS_ADDR + 0x14)
34 #define FLASH_OBR (FLASH_REGS_ADDR + 0x1c)
35 #define FLASH_WRPR (FLASH_REGS_ADDR + 0x20)
37 // For STM32F05x, the RDPTR_KEY may be wrong, but as it is not used anywhere...
38 #define FLASH_RDPTR_KEY 0x00a5
39 #define FLASH_KEY1 0x45670123
40 #define FLASH_KEY2 0xcdef89ab
42 #define FLASH_SR_BSY 0
43 #define FLASH_SR_EOP 5
46 #define FLASH_CR_PER 1
47 #define FLASH_CR_MER 2
48 #define FLASH_CR_STRT 6
49 #define FLASH_CR_LOCK 7
52 //32L = 32F1 same CoreID as 32F4!
53 #define STM32L_FLASH_REGS_ADDR ((uint32_t)0x40023c00)
54 #define STM32L_FLASH_ACR (STM32L_FLASH_REGS_ADDR + 0x00)
55 #define STM32L_FLASH_PECR (STM32L_FLASH_REGS_ADDR + 0x04)
56 #define STM32L_FLASH_PDKEYR (STM32L_FLASH_REGS_ADDR + 0x08)
57 #define STM32L_FLASH_PEKEYR (STM32L_FLASH_REGS_ADDR + 0x0c)
58 #define STM32L_FLASH_PRGKEYR (STM32L_FLASH_REGS_ADDR + 0x10)
59 #define STM32L_FLASH_OPTKEYR (STM32L_FLASH_REGS_ADDR + 0x14)
60 #define STM32L_FLASH_SR (STM32L_FLASH_REGS_ADDR + 0x18)
61 #define STM32L_FLASH_OBR (STM32L_FLASH_REGS_ADDR + 0x1c)
62 #define STM32L_FLASH_WRPR (STM32L_FLASH_REGS_ADDR + 0x20)
63 #define FLASH_L1_FPRG 10
64 #define FLASH_L1_PROG 3
66 //32L4 register base is at FLASH_REGS_ADDR (0x40022000)
67 #define STM32L4_FLASH_KEYR (FLASH_REGS_ADDR + 0x08)
68 #define STM32L4_FLASH_SR (FLASH_REGS_ADDR + 0x10)
69 #define STM32L4_FLASH_CR (FLASH_REGS_ADDR + 0x14)
70 #define STM32L4_FLASH_OPTR (FLASH_REGS_ADDR + 0x20)
72 #define STM32L4_FLASH_SR_BSY 16
73 #define STM32L4_FLASH_SR_ERRMASK 0x3f8 /* SR [9:3] */
75 #define STM32L4_FLASH_CR_LOCK 31 /* Lock control register */
76 #define STM32L4_FLASH_CR_PG 0 /* Program */
77 #define STM32L4_FLASH_CR_PER 1 /* Page erase */
78 #define STM32L4_FLASH_CR_MER1 2 /* Bank 1 erase */
79 #define STM32L4_FLASH_CR_MER2 15 /* Bank 2 erase */
80 #define STM32L4_FLASH_CR_STRT 16 /* Start command */
81 #define STM32L4_FLASH_CR_BKER 11 /* Bank select for page erase */
82 #define STM32L4_FLASH_CR_PNB 3 /* Page number (8 bits) */
83 // Bits requesting flash operations (useful when we want to clear them)
84 #define STM32L4_FLASH_CR_OPBITS \
85 ((1lu<<STM32L4_FLASH_CR_PG) | (1lu<<STM32L4_FLASH_CR_PER) \
86 | (1lu<<STM32L4_FLASH_CR_MER1) | (1lu<<STM32L4_FLASH_CR_MER1))
87 // Page is fully specified by BKER and PNB
88 #define STM32L4_FLASH_CR_PAGEMASK (0x1fflu << STM32L4_FLASH_CR_PNB)
90 #define STM32L4_FLASH_OPTR_DUALBANK 21
92 //STM32L0x flash register base and offsets
94 // RM0090 - DM00031020.pdf
95 #define STM32L0_FLASH_REGS_ADDR ((uint32_t)0x40022000)
96 #define FLASH_ACR_OFF ((uint32_t) 0x00)
97 #define FLASH_PECR_OFF ((uint32_t) 0x04)
98 #define FLASH_PDKEYR_OFF ((uint32_t) 0x08)
99 #define FLASH_PEKEYR_OFF ((uint32_t) 0x0c)
100 #define FLASH_PRGKEYR_OFF ((uint32_t) 0x10)
101 #define FLASH_OPTKEYR_OFF ((uint32_t) 0x14)
102 #define FLASH_SR_OFF ((uint32_t) 0x18)
103 #define FLASH_OBR_OFF ((uint32_t) 0x1c)
104 #define FLASH_WRPR_OFF ((uint32_t) 0x20)
109 #define FLASH_F4_REGS_ADDR ((uint32_t)0x40023c00)
110 #define FLASH_F4_KEYR (FLASH_F4_REGS_ADDR + 0x04)
111 #define FLASH_F4_OPT_KEYR (FLASH_F4_REGS_ADDR + 0x08)
112 #define FLASH_F4_SR (FLASH_F4_REGS_ADDR + 0x0c)
113 #define FLASH_F4_CR (FLASH_F4_REGS_ADDR + 0x10)
114 #define FLASH_F4_OPT_CR (FLASH_F4_REGS_ADDR + 0x14)
115 #define FLASH_F4_CR_STRT 16
116 #define FLASH_F4_CR_LOCK 31
117 #define FLASH_F4_CR_SER 1
118 #define FLASH_F4_CR_SNB 3
119 #define FLASH_F4_CR_SNB_MASK 0xf8
120 #define FLASH_F4_SR_BSY 16
122 #define L1_WRITE_BLOCK_SIZE 0x80
123 #define L0_WRITE_BLOCK_SIZE 0x40
125 void write_uint32(unsigned char* buf, uint32_t ui) {
126 if (!is_bigendian()) { // le -> le (don't swap)
127 buf[0] = ((unsigned char*) &ui)[0];
128 buf[1] = ((unsigned char*) &ui)[1];
129 buf[2] = ((unsigned char*) &ui)[2];
130 buf[3] = ((unsigned char*) &ui)[3];
132 buf[0] = ((unsigned char*) &ui)[3];
133 buf[1] = ((unsigned char*) &ui)[2];
134 buf[2] = ((unsigned char*) &ui)[1];
135 buf[3] = ((unsigned char*) &ui)[0];
139 void write_uint16(unsigned char* buf, uint16_t ui) {
140 if (!is_bigendian()) { // le -> le (don't swap)
141 buf[0] = ((unsigned char*) &ui)[0];
142 buf[1] = ((unsigned char*) &ui)[1];
144 buf[0] = ((unsigned char*) &ui)[1];
145 buf[1] = ((unsigned char*) &ui)[0];
149 uint32_t read_uint32(const unsigned char *c, const int pt) {
151 char *p = (char *) &ui;
153 if (!is_bigendian()) { // le -> le (don't swap)
167 static uint32_t __attribute__((unused)) read_flash_rdp(stlink_t *sl) {
169 stlink_read_debug32(sl, FLASH_WRPR, &rdp);
173 static inline uint32_t read_flash_wrpr(stlink_t *sl) {
175 stlink_read_debug32(sl, FLASH_WRPR, &wrpr);
179 static inline uint32_t read_flash_obr(stlink_t *sl) {
181 stlink_read_debug32(sl, FLASH_OBR, &obr);
185 static inline uint32_t read_flash_cr(stlink_t *sl) {
188 if (sl->flash_type == FLASH_TYPE_F4)
190 else if (sl->flash_type == FLASH_TYPE_L4)
191 reg = STM32L4_FLASH_CR;
195 stlink_read_debug32(sl, reg, &res);
198 fprintf(stdout, "CR:0x%x\n", res);
203 static inline unsigned int is_flash_locked(stlink_t *sl) {
204 /* return non zero for true */
205 uint32_t cr_lock_shift, cr = read_flash_cr(sl);
207 if (sl->flash_type == FLASH_TYPE_F4)
208 cr_lock_shift = FLASH_F4_CR_LOCK;
209 else if (sl->flash_type == FLASH_TYPE_L4)
210 cr_lock_shift = STM32L4_FLASH_CR_LOCK;
212 cr_lock_shift = FLASH_CR_LOCK;
214 return cr & (1 << cr_lock_shift);
217 static void unlock_flash(stlink_t *sl) {
219 /* the unlock sequence consists of 2 write cycles where
220 2 key values are written to the FLASH_KEYR register.
221 an invalid sequence results in a definitive lock of
222 the FPEC block until next reset.
224 if (sl->flash_type == FLASH_TYPE_F4)
225 key_reg = FLASH_F4_KEYR;
226 else if (sl->flash_type == FLASH_TYPE_L4)
227 key_reg = STM32L4_FLASH_KEYR;
229 key_reg = FLASH_KEYR;
231 stlink_write_debug32(sl, key_reg, FLASH_KEY1);
232 stlink_write_debug32(sl, key_reg, FLASH_KEY2);
235 static int unlock_flash_if(stlink_t *sl) {
236 /* unlock flash if already locked */
238 if (is_flash_locked(sl)) {
240 if (is_flash_locked(sl)) {
241 WLOG("Failed to unlock flash!\n");
245 DLOG("Successfully unlocked flash\n");
249 static void lock_flash(stlink_t *sl) {
250 uint32_t cr_lock_shift, cr_reg, n;
252 if (sl->flash_type == FLASH_TYPE_F4) {
253 cr_reg = FLASH_F4_CR;
254 cr_lock_shift = STM32L4_FLASH_CR_LOCK;
255 } else if (sl->flash_type == FLASH_TYPE_L4) {
256 cr_reg = STM32L4_FLASH_CR;
257 cr_lock_shift = STM32L4_FLASH_CR_LOCK;
260 cr_lock_shift = FLASH_CR_LOCK;
263 n = read_flash_cr(sl) | (1 << cr_lock_shift);
264 stlink_write_debug32(sl, cr_reg, n);
268 static void set_flash_cr_pg(stlink_t *sl) {
271 x = read_flash_cr(sl);
273 if (sl->flash_type == FLASH_TYPE_F4) {
274 cr_reg = FLASH_F4_CR;
275 x |= 1 << FLASH_CR_PG;
276 } else if (sl->flash_type == FLASH_TYPE_L4) {
277 cr_reg = STM32L4_FLASH_CR;
278 x &= ~STM32L4_FLASH_CR_OPBITS;
279 x |= 1 << STM32L4_FLASH_CR_PG;
282 x = 1 << FLASH_CR_PG;
285 stlink_write_debug32(sl, cr_reg, x);
288 static void __attribute__((unused)) clear_flash_cr_pg(stlink_t *sl) {
291 if (sl->flash_type == FLASH_TYPE_F4)
292 cr_reg = FLASH_F4_CR;
293 else if (sl->flash_type == FLASH_TYPE_L4)
294 cr_reg = STM32L4_FLASH_CR;
298 n = read_flash_cr(sl) & ~(1 << FLASH_CR_PG);
299 stlink_write_debug32(sl, cr_reg, n);
302 static void set_flash_cr_per(stlink_t *sl) {
303 const uint32_t n = 1 << FLASH_CR_PER;
304 stlink_write_debug32(sl, FLASH_CR, n);
307 static void __attribute__((unused)) clear_flash_cr_per(stlink_t *sl) {
308 const uint32_t n = read_flash_cr(sl) & ~(1 << FLASH_CR_PER);
309 stlink_write_debug32(sl, FLASH_CR, n);
312 static void set_flash_cr_mer(stlink_t *sl) {
313 uint32_t val, cr_reg, cr_mer;
315 if (sl->flash_type == FLASH_TYPE_F4) {
316 cr_reg = FLASH_F4_CR;
317 cr_mer = 1 << FLASH_CR_MER;
318 } else if (sl->flash_type == FLASH_TYPE_L4) {
319 cr_reg = STM32L4_FLASH_CR;
320 cr_mer = (1 << STM32L4_FLASH_CR_MER1) | (1 << STM32L4_FLASH_CR_MER2);
323 cr_mer = 1 << FLASH_CR_MER;
326 stlink_read_debug32(sl, cr_reg, &val);
328 stlink_write_debug32(sl, cr_reg, val);
331 static void __attribute__((unused)) clear_flash_cr_mer(stlink_t *sl) {
332 uint32_t val, cr_reg, cr_mer;
334 if (sl->flash_type == FLASH_TYPE_F4) {
335 cr_reg = FLASH_F4_CR;
336 cr_mer = 1 << FLASH_CR_MER;
337 } else if (sl->flash_type == FLASH_TYPE_L4) {
338 cr_reg = STM32L4_FLASH_CR;
339 cr_mer = (1 << STM32L4_FLASH_CR_MER1) | (1 << STM32L4_FLASH_CR_MER2);
342 cr_mer = 1 << FLASH_CR_MER;
345 stlink_read_debug32(sl, cr_reg, &val);
347 stlink_write_debug32(sl, cr_reg, val);
350 static void set_flash_cr_strt(stlink_t *sl) {
351 uint32_t val, cr_reg, cr_strt;
353 if (sl->flash_type == FLASH_TYPE_F4) {
354 cr_reg = FLASH_F4_CR;
355 cr_strt = 1 << FLASH_F4_CR_STRT;
356 } else if (sl->flash_type == FLASH_TYPE_L4) {
357 cr_reg = STM32L4_FLASH_CR;
358 cr_strt = 1 << STM32L4_FLASH_CR_STRT;
361 cr_strt = 1 << FLASH_CR_STRT;
364 stlink_read_debug32(sl, cr_reg, &val);
366 stlink_write_debug32(sl, cr_reg, val);
369 static inline uint32_t read_flash_acr(stlink_t *sl) {
371 stlink_read_debug32(sl, FLASH_ACR, &acr);
375 static inline uint32_t read_flash_sr(stlink_t *sl) {
376 uint32_t res, sr_reg;
378 if (sl->flash_type == FLASH_TYPE_F4)
379 sr_reg = FLASH_F4_SR;
380 else if (sl->flash_type == FLASH_TYPE_L4)
381 sr_reg = STM32L4_FLASH_SR;
385 stlink_read_debug32(sl, sr_reg, &res);
390 static inline unsigned int is_flash_busy(stlink_t *sl) {
391 uint32_t sr_busy_shift;
393 if (sl->flash_type == FLASH_TYPE_F4)
394 sr_busy_shift = FLASH_F4_SR_BSY;
395 else if (sl->flash_type == FLASH_TYPE_L4)
396 sr_busy_shift = STM32L4_FLASH_SR_BSY;
398 sr_busy_shift = FLASH_SR_BSY;
400 return read_flash_sr(sl) & (1 << sr_busy_shift);
403 static void wait_flash_busy(stlink_t *sl) {
404 /* todo: add some delays here */
405 while (is_flash_busy(sl))
409 static void wait_flash_busy_progress(stlink_t *sl) {
411 fprintf(stdout, "Mass erasing");
413 while (is_flash_busy(sl)) {
417 fprintf(stdout, ".");
421 fprintf(stdout, "\n");
424 static inline unsigned int is_flash_eop(stlink_t *sl) {
425 return read_flash_sr(sl) & (1 << FLASH_SR_EOP);
428 static void __attribute__((unused)) clear_flash_sr_eop(stlink_t *sl) {
429 const uint32_t n = read_flash_sr(sl) & ~(1 << FLASH_SR_EOP);
430 stlink_write_debug32(sl, FLASH_SR, n);
433 static void __attribute__((unused)) wait_flash_eop(stlink_t *sl) {
434 /* todo: add some delays here */
435 while (is_flash_eop(sl) == 0)
439 static inline void write_flash_ar(stlink_t *sl, uint32_t n) {
440 stlink_write_debug32(sl, FLASH_AR, n);
443 static inline void write_flash_cr_psiz(stlink_t *sl, uint32_t n) {
444 uint32_t x = read_flash_cr(sl);
448 fprintf(stdout, "PSIZ:0x%x 0x%x\n", x, n);
450 stlink_write_debug32(sl, FLASH_F4_CR, x);
454 static inline void write_flash_cr_snb(stlink_t *sl, uint32_t n) {
455 uint32_t x = read_flash_cr(sl);
456 x &= ~FLASH_F4_CR_SNB_MASK;
457 x |= (n << FLASH_F4_CR_SNB);
458 x |= (1 << FLASH_F4_CR_SER);
460 fprintf(stdout, "SNB:0x%x 0x%x\n", x, n);
462 stlink_write_debug32(sl, FLASH_F4_CR, x);
465 static inline void write_flash_cr_bker_pnb(stlink_t *sl, uint32_t n) {
466 stlink_write_debug32(sl, STM32L4_FLASH_SR, 0xFFFFFFFF & ~(1<<STM32L4_FLASH_SR_BSY));
467 uint32_t x = read_flash_cr(sl);
468 x &=~ STM32L4_FLASH_CR_OPBITS;
469 x &=~ STM32L4_FLASH_CR_PAGEMASK;
470 x &= ~(1<<STM32L4_FLASH_CR_MER1);
471 x &= ~(1<<STM32L4_FLASH_CR_MER2);
472 x |= (n << STM32L4_FLASH_CR_PNB);
473 x |= (1lu << STM32L4_FLASH_CR_PER);
475 fprintf(stdout, "BKER:PNB:0x%x 0x%x\n", x, n);
477 stlink_write_debug32(sl, STM32L4_FLASH_CR, x);
480 // Delegates to the backends...
482 void stlink_close(stlink_t *sl) {
483 DLOG("*** stlink_close ***\n");
484 sl->backend->close(sl);
488 int stlink_exit_debug_mode(stlink_t *sl) {
491 DLOG("*** stlink_exit_debug_mode ***\n");
492 ret = stlink_write_debug32(sl, DHCSR, DBGKEY);
496 return sl->backend->exit_debug_mode(sl);
499 int stlink_enter_swd_mode(stlink_t *sl) {
500 DLOG("*** stlink_enter_swd_mode ***\n");
501 return sl->backend->enter_swd_mode(sl);
504 // Force the core into the debug mode -> halted state.
505 int stlink_force_debug(stlink_t *sl) {
506 DLOG("*** stlink_force_debug_mode ***\n");
507 return sl->backend->force_debug(sl);
510 int stlink_exit_dfu_mode(stlink_t *sl) {
511 DLOG("*** stlink_exit_dfu_mode ***\n");
512 return sl->backend->exit_dfu_mode(sl);
515 int stlink_core_id(stlink_t *sl) {
518 DLOG("*** stlink_core_id ***\n");
519 ret = sl->backend->core_id(sl);
521 ELOG("Failed to read core_id\n");
525 stlink_print_data(sl);
526 DLOG("core_id = 0x%08x\n", sl->core_id);
530 int stlink_chip_id(stlink_t *sl, uint32_t *chip_id) {
533 ret = stlink_read_debug32(sl, 0xE0042000, chip_id);
538 ret = stlink_read_debug32(sl, 0x40015800, chip_id); //Try Corex M0 DBGMCU_IDCODE register address
544 * Cortex m3 tech ref manual, CPUID register description
545 * @param sl stlink context
546 * @param cpuid pointer to the result object
548 int stlink_cpu_id(stlink_t *sl, cortex_m3_cpuid_t *cpuid) {
551 if (stlink_read_debug32(sl, CM3_REG_CPUID, &raw))
554 cpuid->implementer_id = (raw >> 24) & 0x7f;
555 cpuid->variant = (raw >> 20) & 0xf;
556 cpuid->part = (raw >> 4) & 0xfff;
557 cpuid->revision = raw & 0xf;
562 * reads and decodes the flash parameters, as dynamically as possible
564 * @return 0 for success, or -1 for unsupported core type.
566 int stlink_load_device_params(stlink_t *sl) {
567 ILOG("Loading device parameters....\n");
568 const chip_params_t *params = NULL;
573 stlink_chip_id(sl, &chip_id);
574 sl->chip_id = chip_id & 0xfff;
575 /* Fix chip_id for F4 rev A errata , Read CPU ID, as CoreID is the same for F2/F4*/
576 if (sl->chip_id == 0x411) {
578 stlink_read_debug32(sl, 0xE000ED00, &cpuid);
579 if ((cpuid & 0xfff0) == 0xc240)
583 for (size_t i = 0; i < sizeof(devices) / sizeof(devices[0]); i++) {
584 if(devices[i].chip_id == sl->chip_id) {
585 params = &devices[i];
589 if (params == NULL) {
590 WLOG("unknown chip id! %#x\n", chip_id);
594 // These are fixed...
595 sl->flash_base = STM32_FLASH_BASE;
596 sl->sram_base = STM32_SRAM_BASE;
597 stlink_read_debug32(sl,(params->flash_size_reg) & ~3, &flash_size);
598 if (params->flash_size_reg & 2)
599 flash_size = flash_size >>16;
600 flash_size = flash_size & 0xffff;
602 if ((sl->chip_id == STM32_CHIPID_L1_MEDIUM || sl->chip_id == STM32_CHIPID_L1_MEDIUM_PLUS) && ( flash_size == 0 )) {
603 sl->flash_size = 128 * 1024;
604 } else if (sl->chip_id == STM32_CHIPID_L1_CAT2) {
605 sl->flash_size = (flash_size & 0xff) * 1024;
606 } else if ((sl->chip_id & 0xFFF) == STM32_CHIPID_L1_HIGH) {
607 // 0 is 384k and 1 is 256k
608 if ( flash_size == 0 ) {
609 sl->flash_size = 384 * 1024;
611 sl->flash_size = 256 * 1024;
614 sl->flash_size = flash_size * 1024;
616 sl->flash_type = params->flash_type;
617 sl->flash_pgsz = params->flash_pagesize;
618 sl->sram_size = params->sram_size;
619 sl->sys_base = params->bootrom_base;
620 sl->sys_size = params->bootrom_size;
622 //medium and low devices have the same chipid. ram size depends on flash size.
623 //STM32F100xx datasheet Doc ID 16455 Table 2
624 if(sl->chip_id == STM32_CHIPID_F1_VL_MEDIUM_LOW && sl->flash_size < 64 * 1024){
625 sl->sram_size = 0x1000;
628 ILOG("Device connected is: %s, id %#x\n", params->description, chip_id);
629 // TODO make note of variable page size here.....
630 ILOG("SRAM size: %#x bytes (%d KiB), Flash: %#x bytes (%d KiB) in pages of %zd bytes\n",
631 sl->sram_size, sl->sram_size / 1024, sl->flash_size, sl->flash_size / 1024,
636 int stlink_reset(stlink_t *sl) {
637 DLOG("*** stlink_reset ***\n");
638 return sl->backend->reset(sl);
641 int stlink_jtag_reset(stlink_t *sl, int value) {
642 DLOG("*** stlink_jtag_reset ***\n");
643 return sl->backend->jtag_reset(sl, value);
646 int stlink_run(stlink_t *sl) {
647 DLOG("*** stlink_run ***\n");
648 return sl->backend->run(sl);
651 int stlink_status(stlink_t *sl) {
654 DLOG("*** stlink_status ***\n");
655 ret = sl->backend->status(sl);
656 stlink_core_stat(sl);
662 * Decode the version bits, originally from -sg, verified with usb
663 * @param sl stlink context, assumed to contain valid data in the buffer
664 * @param slv output parsed version object
666 void _parse_version(stlink_t *sl, stlink_version_t *slv) {
667 uint32_t b0 = sl->q_buf[0]; //lsb
668 uint32_t b1 = sl->q_buf[1];
669 uint32_t b2 = sl->q_buf[2];
670 uint32_t b3 = sl->q_buf[3];
671 uint32_t b4 = sl->q_buf[4];
672 uint32_t b5 = sl->q_buf[5]; //msb
674 // b0 b1 || b2 b3 | b4 b5
675 // 4b | 6b | 6b || 2B | 2B
676 // stlink_v | jtag_v | swim_v || st_vid | stlink_pid
678 slv->stlink_v = (b0 & 0xf0) >> 4;
679 slv->jtag_v = ((b0 & 0x0f) << 2) | ((b1 & 0xc0) >> 6);
680 slv->swim_v = b1 & 0x3f;
681 slv->st_vid = (b3 << 8) | b2;
682 slv->stlink_pid = (b5 << 8) | b4;
686 int stlink_version(stlink_t *sl) {
687 DLOG("*** looking up stlink version\n");
688 if (sl->backend->version(sl))
691 _parse_version(sl, &sl->version);
693 DLOG("st vid = 0x%04x (expect 0x%04x)\n", sl->version.st_vid, USB_ST_VID);
694 DLOG("stlink pid = 0x%04x\n", sl->version.stlink_pid);
695 DLOG("stlink version = 0x%x\n", sl->version.stlink_v);
696 DLOG("jtag version = 0x%x\n", sl->version.jtag_v);
697 DLOG("swim version = 0x%x\n", sl->version.swim_v);
698 if (sl->version.jtag_v == 0) {
699 DLOG(" notice: the firmware doesn't support a jtag/swd interface\n");
701 if (sl->version.swim_v == 0) {
702 DLOG(" notice: the firmware doesn't support a swim interface\n");
708 int stlink_target_voltage(stlink_t *sl) {
710 DLOG("*** reading target voltage\n");
711 if (sl->backend->target_voltage != NULL) {
712 voltage = sl->backend->target_voltage(sl);
714 DLOG("target voltage = %ldmV\n", voltage);
716 DLOG("error reading target voltage\n");
719 DLOG("reading voltage not supported by backend\n");
724 int stlink_read_debug32(stlink_t *sl, uint32_t addr, uint32_t *data) {
727 ret = sl->backend->read_debug32(sl, addr, data);
729 DLOG("*** stlink_read_debug32 %x is %#x\n", data, addr);
734 int stlink_write_debug32(stlink_t *sl, uint32_t addr, uint32_t data) {
735 DLOG("*** stlink_write_debug32 %x to %#x\n", data, addr);
736 return sl->backend->write_debug32(sl, addr, data);
739 int stlink_write_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
740 DLOG("*** stlink_write_mem32 %u bytes to %#x\n", len, addr);
742 fprintf(stderr, "Error: Data length doesn't have a 32 bit alignment: +%d byte.\n", len % 4);
745 return sl->backend->write_mem32(sl, addr, len);
748 int stlink_read_mem32(stlink_t *sl, uint32_t addr, uint16_t len) {
749 DLOG("*** stlink_read_mem32 ***\n");
750 if (len % 4 != 0) { // !!! never ever: fw gives just wrong values
751 fprintf(stderr, "Error: Data length doesn't have a 32 bit alignment: +%d byte.\n",
755 return sl->backend->read_mem32(sl, addr, len);
758 int stlink_write_mem8(stlink_t *sl, uint32_t addr, uint16_t len) {
759 DLOG("*** stlink_write_mem8 ***\n");
760 if (len > 0x40 ) { // !!! never ever: Writing more then 0x40 bytes gives unexpected behaviour
761 fprintf(stderr, "Error: Data length > 64: +%d byte.\n",
765 return sl->backend->write_mem8(sl, addr, len);
768 int stlink_read_all_regs(stlink_t *sl, reg *regp) {
769 DLOG("*** stlink_read_all_regs ***\n");
770 return sl->backend->read_all_regs(sl, regp);
773 int stlink_read_all_unsupported_regs(stlink_t *sl, reg *regp) {
774 DLOG("*** stlink_read_all_unsupported_regs ***\n");
775 return sl->backend->read_all_unsupported_regs(sl, regp);
778 int stlink_write_reg(stlink_t *sl, uint32_t reg, int idx) {
779 DLOG("*** stlink_write_reg\n");
780 return sl->backend->write_reg(sl, reg, idx);
783 int stlink_read_reg(stlink_t *sl, int r_idx, reg *regp) {
784 DLOG("*** stlink_read_reg\n");
785 DLOG(" (%d) ***\n", r_idx);
787 if (r_idx > 20 || r_idx < 0) {
788 fprintf(stderr, "Error: register index must be in [0..20]\n");
792 return sl->backend->read_reg(sl, r_idx, regp);
795 int stlink_read_unsupported_reg(stlink_t *sl, int r_idx, reg *regp) {
798 DLOG("*** stlink_read_unsupported_reg\n");
799 DLOG(" (%d) ***\n", r_idx);
801 /* Convert to values used by DCRSR */
802 if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
804 } else if (r_idx == 0x40) { /* FPSCR */
806 } else if (r_idx >= 0x20 && r_idx < 0x40) {
807 r_convert = 0x40 + (r_idx - 0x20);
809 fprintf(stderr, "Error: register address must be in [0x1C..0x40]\n");
813 return sl->backend->read_unsupported_reg(sl, r_convert, regp);
816 int stlink_write_unsupported_reg(stlink_t *sl, uint32_t val, int r_idx, reg *regp) {
819 DLOG("*** stlink_write_unsupported_reg\n");
820 DLOG(" (%d) ***\n", r_idx);
822 /* Convert to values used by DCRSR */
823 if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
824 r_convert = r_idx; /* The backend function handles this */
825 } else if (r_idx == 0x40) { /* FPSCR */
827 } else if (r_idx >= 0x20 && r_idx < 0x40) {
828 r_convert = 0x40 + (r_idx - 0x20);
830 fprintf(stderr, "Error: register address must be in [0x1C..0x40]\n");
834 return sl->backend->write_unsupported_reg(sl, val, r_convert, regp);
837 unsigned int is_core_halted(stlink_t *sl) {
838 /* return non zero if core is halted */
840 return sl->q_buf[0] == STLINK_CORE_HALTED;
843 int stlink_step(stlink_t *sl) {
844 DLOG("*** stlink_step ***\n");
845 return sl->backend->step(sl);
848 int stlink_current_mode(stlink_t *sl) {
849 int mode = sl->backend->current_mode(sl);
851 case STLINK_DEV_DFU_MODE:
852 DLOG("stlink current mode: dfu\n");
854 case STLINK_DEV_DEBUG_MODE:
855 DLOG("stlink current mode: debug (jtag or swd)\n");
857 case STLINK_DEV_MASS_MODE:
858 DLOG("stlink current mode: mass\n");
861 DLOG("stlink mode: unknown!\n");
862 return STLINK_DEV_UNKNOWN_MODE;
868 // End of delegates.... Common code below here...
871 // http://www.ibm.com/developerworks/aix/library/au-endianc/index.html
873 // #define is_bigendian() ( (*(char*)&i) == 0 )
875 inline unsigned int is_bigendian(void) {
876 static volatile const unsigned int i = 1;
877 return *(volatile const char*) &i == 0;
880 uint16_t read_uint16(const unsigned char *c, const int pt) {
882 char *p = (char *) &ui;
884 if (!is_bigendian()) { // le -> le (don't swap)
894 // same as above with entrypoint.
896 void stlink_run_at(stlink_t *sl, stm32_addr_t addr) {
897 stlink_write_reg(sl, addr, 15); /* pc register */
901 while (is_core_halted(sl) == 0)
905 void stlink_core_stat(stlink_t *sl) {
909 switch (sl->q_buf[0]) {
910 case STLINK_CORE_RUNNING:
911 sl->core_stat = STLINK_CORE_RUNNING;
912 DLOG(" core status: running\n");
914 case STLINK_CORE_HALTED:
915 sl->core_stat = STLINK_CORE_HALTED;
916 DLOG(" core status: halted\n");
919 sl->core_stat = STLINK_CORE_STAT_UNKNOWN;
920 fprintf(stderr, " core status: unknown\n");
924 void stlink_print_data(stlink_t * sl) {
925 if (sl->q_len <= 0 || sl->verbose < UDEBUG)
928 fprintf(stdout, "data_len = %d 0x%x\n", sl->q_len, sl->q_len);
930 for (int i = 0; i < sl->q_len; i++) {
933 if (sl->q_data_dir == Q_DATA_OUT)
934 fprintf(stdout, "\n<- 0x%08x ", sl->q_addr + i);
936 fprintf(stdout, "\n-> 0x%08x ", sl->q_addr + i);
939 fprintf(stdout, " %02x", (unsigned int) sl->q_buf[i]);
941 fputs("\n\n", stdout);
944 /* memory mapped file */
946 typedef struct mapped_file {
951 #define MAPPED_FILE_INITIALIZER { NULL, 0 }
953 static int map_file(mapped_file_t* mf, const char* path) {
957 const int fd = open(path, O_RDONLY | O_BINARY);
959 fprintf(stderr, "open(%s) == -1\n", path);
963 if (fstat(fd, &st) == -1) {
964 fprintf(stderr, "fstat() == -1\n");
968 mf->base = (uint8_t*) mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
969 if (mf->base == MAP_FAILED) {
970 fprintf(stderr, "mmap() == MAP_FAILED\n");
974 mf->len = st.st_size;
985 static void unmap_file(mapped_file_t * mf) {
986 munmap((void*) mf->base, mf->len);
987 mf->base = (unsigned char*) MAP_FAILED;
991 /* Limit the block size to compare to 0x1800
992 Anything larger will stall the STLINK2
993 Maybe STLINK V1 needs smaller value!*/
994 static int check_file(stlink_t* sl, mapped_file_t* mf, stm32_addr_t addr) {
996 size_t n_cmp = sl->flash_pgsz;
1000 for (off = 0; off < mf->len; off += n_cmp) {
1001 size_t aligned_size;
1003 /* adjust last page size */
1004 size_t cmp_size = n_cmp;
1005 if ((off + n_cmp) > mf->len)
1006 cmp_size = mf->len - off;
1008 aligned_size = cmp_size;
1009 if (aligned_size & (4 - 1))
1010 aligned_size = (cmp_size + 4) & ~(4 - 1);
1012 stlink_read_mem32(sl, addr + off, aligned_size);
1014 if (memcmp(sl->q_buf, mf->base + off, cmp_size))
1021 int stlink_fwrite_sram
1022 (stlink_t * sl, const char* path, stm32_addr_t addr) {
1023 /* write the file in sram at addr */
1028 mapped_file_t mf = MAPPED_FILE_INITIALIZER;
1032 if (map_file(&mf, path) == -1) {
1033 fprintf(stderr, "map_file() == -1\n");
1037 /* check addr range is inside the sram */
1038 if (addr < sl->sram_base) {
1039 fprintf(stderr, "addr too low\n");
1041 } else if ((addr + mf.len) < addr) {
1042 fprintf(stderr, "addr overruns\n");
1044 } else if ((addr + mf.len) > (sl->sram_base + sl->sram_size)) {
1045 fprintf(stderr, "addr too high\n");
1047 } else if (addr & 3) {
1049 fprintf(stderr, "unaligned addr\n");
1059 /* do the copy by 1k blocks */
1060 for (off = 0; off < len; off += 1024) {
1062 if ((off + size) > len)
1065 memcpy(sl->q_buf, mf.base + off, size);
1067 /* round size if needed */
1071 stlink_write_mem32(sl, addr + off, size);
1075 memcpy(sl->q_buf, mf.base + len, mf.len - len);
1076 stlink_write_mem8(sl, addr + len, mf.len - len);
1079 /* check the file ha been written */
1080 if (check_file(sl, &mf, addr) == -1) {
1081 fprintf(stderr, "check_file() == -1\n");
1088 stlink_read_debug32(sl, addr, &val);
1089 stlink_write_reg(sl, val, 13);
1090 /* Set PC to the reset routine*/
1091 stlink_read_debug32(sl, addr + 4, &val);
1092 stlink_write_reg(sl, val, 15);
1100 int stlink_fread(stlink_t* sl, const char* path, stm32_addr_t addr, size_t size) {
1101 /* read size bytes from addr to file */
1106 const int fd = open(path, O_RDWR | O_TRUNC | O_CREAT, 00700);
1108 fprintf(stderr, "open(%s) == -1\n", path);
1113 size = sl->flash_size;
1115 if (size > sl->flash_size)
1116 size = sl->flash_size;
1118 size_t cmp_size = (sl->flash_pgsz > 0x1800)? 0x1800:sl->flash_pgsz;
1119 for (off = 0; off < size; off += cmp_size) {
1120 size_t aligned_size;
1122 /* adjust last page size */
1123 if ((off + cmp_size) > size)
1124 cmp_size = size - off;
1126 aligned_size = cmp_size;
1127 if (aligned_size & (4 - 1))
1128 aligned_size = (cmp_size + 4) & ~(4 - 1);
1130 stlink_read_mem32(sl, addr + off, aligned_size);
1132 if (write(fd, sl->q_buf, sl->q_len) != (ssize_t) aligned_size) {
1133 fprintf(stderr, "write() != aligned_size\n");
1147 int write_buffer_to_sram(stlink_t *sl, flash_loader_t* fl, const uint8_t* buf, size_t size) {
1148 /* write the buffer right after the loader */
1149 size_t chunk = size & ~0x3;
1150 size_t rem = size & 0x3;
1152 memcpy(sl->q_buf, buf, chunk);
1153 stlink_write_mem32(sl, fl->buf_addr, chunk);
1156 memcpy(sl->q_buf, buf+chunk, rem);
1157 stlink_write_mem8(sl, (fl->buf_addr)+chunk, rem);
1162 uint32_t calculate_F4_sectornum(uint32_t flashaddr){
1163 uint32_t offset = 0;
1164 flashaddr &= ~STM32_FLASH_BASE; //Page now holding the actual flash address
1165 if (flashaddr >= 0x100000) {
1167 flashaddr -= 0x100000;
1169 if (flashaddr<0x4000) return (offset + 0);
1170 else if(flashaddr<0x8000) return(offset + 1);
1171 else if(flashaddr<0xc000) return(offset + 2);
1172 else if(flashaddr<0x10000) return(offset + 3);
1173 else if(flashaddr<0x20000) return(offset + 4);
1174 else return offset + (flashaddr/0x20000) +4;
1178 uint32_t calculate_F7_sectornum(uint32_t flashaddr){
1179 flashaddr &= ~STM32_FLASH_BASE; //Page now holding the actual flash address
1180 if(flashaddr<0x20000) return(flashaddr/0x8000);
1181 else if(flashaddr<0x40000) return(4);
1182 else return(flashaddr/0x40000) +4;
1186 // Returns BKER:PNB for the given page address
1187 uint32_t calculate_L4_page(stlink_t *sl, uint32_t flashaddr) {
1190 stlink_read_debug32(sl, STM32L4_FLASH_OPTR, &flashopt);
1191 flashaddr -= STM32_FLASH_BASE;
1192 if (flashopt & (1lu << STM32L4_FLASH_OPTR_DUALBANK)) {
1193 uint32_t banksize = sl->flash_size / 2;
1194 if (flashaddr > banksize) {
1195 flashaddr -= banksize;
1199 // For 1MB chips without the dual-bank option set, the page address will
1200 // overflow into the BKER bit, which gives us the correct bank:page value.
1201 return bker | flashaddr/sl->flash_pgsz;
1204 uint32_t stlink_calculate_pagesize(stlink_t *sl, uint32_t flashaddr){
1205 if ((sl->chip_id == STM32_CHIPID_F2) || (sl->chip_id == STM32_CHIPID_F4) || (sl->chip_id == STM32_CHIPID_F4_DE) ||
1206 (sl->chip_id == STM32_CHIPID_F4_LP) || (sl->chip_id == STM32_CHIPID_F4_HD) || (sl->chip_id == STM32_CHIPID_F411RE) ||
1207 (sl->chip_id == STM32_CHIPID_F446) || (sl->chip_id == STM32_CHIPID_F4_DSI)) {
1208 uint32_t sector=calculate_F4_sectornum(flashaddr);
1212 if (sector<4) sl->flash_pgsz=0x4000;
1213 else if(sector<5) sl->flash_pgsz=0x10000;
1214 else sl->flash_pgsz=0x20000;
1216 else if (sl->chip_id == STM32_CHIPID_F7) {
1217 uint32_t sector=calculate_F7_sectornum(flashaddr);
1218 if (sector<4) sl->flash_pgsz=0x8000;
1219 else if(sector<5) sl->flash_pgsz=0x20000;
1220 else sl->flash_pgsz=0x40000;
1222 return (sl->flash_pgsz);
1226 * Erase a page of flash, assumes sl is fully populated with things like chip/core ids
1227 * @param sl stlink context
1228 * @param flashaddr an address in the flash page to erase
1229 * @return 0 on success -ve on failure
1231 int stlink_erase_flash_page(stlink_t *sl, stm32_addr_t flashaddr)
1233 if (sl->flash_type == FLASH_TYPE_F4 || sl->flash_type == FLASH_TYPE_L4) {
1234 /* wait for ongoing op to finish */
1235 wait_flash_busy(sl);
1237 /* unlock if locked */
1238 unlock_flash_if(sl);
1240 /* select the page to erase */
1241 if (sl->chip_id == STM32_CHIPID_L4) {
1242 // calculate the actual bank+page from the address
1243 uint32_t page = calculate_L4_page(sl, flashaddr);
1245 write_flash_cr_bker_pnb(sl, page);
1246 } else if (sl->chip_id == STM32_CHIPID_F7) {
1247 // calculate the actual page from the address
1248 uint32_t sector=calculate_F7_sectornum(flashaddr);
1250 fprintf(stderr, "EraseFlash - Sector:0x%x Size:0x%x\n", sector, stlink_calculate_pagesize(sl, flashaddr));
1252 write_flash_cr_snb(sl, sector);
1254 // calculate the actual page from the address
1255 uint32_t sector=calculate_F4_sectornum(flashaddr);
1257 fprintf(stderr, "EraseFlash - Sector:0x%x Size:0x%x\n", sector, stlink_calculate_pagesize(sl, flashaddr));
1259 //the SNB values for flash sectors in the second bank do not directly follow the values for the first bank on 2mb devices...
1260 if (sector >= 12) sector += 4;
1262 write_flash_cr_snb(sl, sector);
1265 /* start erase operation */
1266 set_flash_cr_strt(sl);
1268 /* wait for completion */
1269 wait_flash_busy(sl);
1271 /* relock the flash */
1272 //todo: fails to program if this is in
1275 fprintf(stdout, "Erase Final CR:0x%x\n", read_flash_cr(sl));
1277 } else if (sl->flash_type == FLASH_TYPE_L0) {
1280 uint32_t flash_regs_base;
1281 if (sl->chip_id == STM32_CHIPID_L0) {
1282 flash_regs_base = STM32L0_FLASH_REGS_ADDR;
1284 flash_regs_base = STM32L_FLASH_REGS_ADDR;
1287 /* check if the locks are set */
1288 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1289 if((val & (1<<0))||(val & (1<<1))) {
1290 /* disable pecr protection */
1291 stlink_write_debug32(sl, flash_regs_base + FLASH_PEKEYR_OFF, 0x89abcdef);
1292 stlink_write_debug32(sl, flash_regs_base + FLASH_PEKEYR_OFF, 0x02030405);
1294 /* check pecr.pelock is cleared */
1295 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1296 if (val & (1 << 0)) {
1297 WLOG("pecr.pelock not clear (%#x)\n", val);
1301 /* unlock program memory */
1302 stlink_write_debug32(sl, flash_regs_base + FLASH_PRGKEYR_OFF, 0x8c9daebf);
1303 stlink_write_debug32(sl, flash_regs_base + FLASH_PRGKEYR_OFF, 0x13141516);
1305 /* check pecr.prglock is cleared */
1306 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1307 if (val & (1 << 1)) {
1308 WLOG("pecr.prglock not clear (%#x)\n", val);
1313 /* set pecr.{erase,prog} */
1314 val |= (1 << 9) | (1 << 3);
1315 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1316 #if 0 /* fix_to_be_confirmed */
1318 /* wait for sr.busy to be cleared
1319 * MP: Test shows that busy bit is not set here. Perhaps, PM0062 is
1320 * wrong and we do not need to wait here for clearing the busy bit.
1321 * TEXANE: ok, if experience says so and it works for you, we comment
1322 * it. If someone has a problem, please drop an email.
1325 stlink_read_debug32(sl, STM32L_FLASH_SR, &val)
1326 } while((val & (1 << 0)) != 0);
1328 #endif /* fix_to_be_confirmed */
1330 /* write 0 to the first word of the page to be erased */
1331 stlink_write_debug32(sl, flashaddr, 0);
1333 /* MP: It is better to wait for clearing the busy bit after issuing
1334 page erase command, even though PM0062 recommends to wait before it.
1335 Test shows that a few iterations is performed in the following loop
1336 before busy bit is cleared.*/
1338 stlink_read_debug32(sl, flash_regs_base + FLASH_SR_OFF, &val);
1339 } while ((val & (1 << 0)) != 0);
1341 /* reset lock bits */
1342 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1343 val |= (1 << 0) | (1 << 1) | (1 << 2);
1344 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1345 } else if (sl->flash_type == FLASH_TYPE_F0) {
1346 /* wait for ongoing op to finish */
1347 wait_flash_busy(sl);
1349 /* unlock if locked */
1350 unlock_flash_if(sl);
1352 /* set the page erase bit */
1353 set_flash_cr_per(sl);
1355 /* select the page to erase */
1356 write_flash_ar(sl, flashaddr);
1358 /* start erase operation, reset by hw with bsy bit */
1359 set_flash_cr_strt(sl);
1361 /* wait for completion */
1362 wait_flash_busy(sl);
1364 /* relock the flash */
1367 WLOG("unknown coreid %x, page erase failed\n", sl->core_id);
1371 /* todo: verify the erased page */
1376 int stlink_erase_flash_mass(stlink_t *sl) {
1377 if (sl->flash_type == FLASH_TYPE_L0) {
1378 /* erase each page */
1379 int i = 0, num_pages = sl->flash_size/sl->flash_pgsz;
1380 for (i = 0; i < num_pages; i++) {
1381 /* addr must be an addr inside the page */
1382 stm32_addr_t addr = sl->flash_base + i * sl->flash_pgsz;
1383 if (stlink_erase_flash_page(sl, addr) == -1) {
1384 WLOG("Failed to erase_flash_page(%#zx) == -1\n", addr);
1387 fprintf(stdout,"\rFlash page at %5d/%5d erased", i, num_pages);
1390 fprintf(stdout, "\n");
1392 /* wait for ongoing op to finish */
1393 wait_flash_busy(sl);
1395 /* unlock if locked */
1396 unlock_flash_if(sl);
1398 /* set the mass erase bit */
1399 set_flash_cr_mer(sl);
1401 /* start erase operation, reset by hw with bsy bit */
1402 set_flash_cr_strt(sl);
1404 /* wait for completion */
1405 wait_flash_busy_progress(sl);
1407 /* relock the flash */
1410 /* todo: verify the erased memory */
1415 int init_flash_loader(stlink_t *sl, flash_loader_t* fl) {
1418 /* allocate the loader in sram */
1419 if (write_loader_to_sram(sl, &fl->loader_addr, &size) == -1) {
1420 WLOG("Failed to write flash loader to sram!\n");
1424 /* allocate a one page buffer in sram right after loader */
1425 fl->buf_addr = fl->loader_addr + size;
1426 ILOG("Successfully loaded flash loader in sram\n");
1430 int write_loader_to_sram(stlink_t *sl, stm32_addr_t* addr, size_t* size) {
1431 /* from openocd, contrib/loaders/flash/stm32.s */
1432 static const uint8_t loader_code_stm32vl[] = {
1433 0x08, 0x4c, /* ldr r4, STM32_FLASH_BASE */
1434 0x1c, 0x44, /* add r4, r3 */
1435 /* write_half_word: */
1436 0x01, 0x23, /* movs r3, #0x01 */
1437 0x23, 0x61, /* str r3, [r4, #STM32_FLASH_CR_OFFSET] */
1438 0x30, 0xf8, 0x02, 0x3b, /* ldrh r3, [r0], #0x02 */
1439 0x21, 0xf8, 0x02, 0x3b, /* strh r3, [r1], #0x02 */
1441 0xe3, 0x68, /* ldr r3, [r4, #STM32_FLASH_SR_OFFSET] */
1442 0x13, 0xf0, 0x01, 0x0f, /* tst r3, #0x01 */
1443 0xfb, 0xd0, /* beq busy */
1444 0x13, 0xf0, 0x14, 0x0f, /* tst r3, #0x14 */
1445 0x01, 0xd1, /* bne exit */
1446 0x01, 0x3a, /* subs r2, r2, #0x01 */
1447 0xf0, 0xd1, /* bne write_half_word */
1449 0x00, 0xbe, /* bkpt #0x00 */
1450 0x00, 0x20, 0x02, 0x40, /* STM32_FLASH_BASE: .word 0x40022000 */
1453 /* flashloaders/stm32f0.s -- thumb1 only, same sequence as for STM32VL, bank ignored */
1454 static const uint8_t loader_code_stm32f0[] = {
1457 * These two NOPs here are a safety precaution, added by Pekka Nikander
1458 * while debugging the STM32F05x support. They may not be needed, but
1459 * there were strange problems with simpler programs, like a program
1460 * that had just a breakpoint or a program that first moved zero to register r2
1461 * and then had a breakpoint. So, it appears safest to have these two nops.
1463 * Feel free to remove them, if you dare, but then please do test the result
1464 * rigorously. Also, if you remove these, it may be a good idea first to
1465 * #if 0 them out, with a comment when these were taken out, and to remove
1466 * these only a few months later... But YMMV.
1468 0x00, 0x30, // nop /* add r0,#0 */
1469 0x00, 0x30, // nop /* add r0,#0 */
1471 0x0A, 0x4C, // ldr r4, STM32_FLASH_BASE
1472 0x01, 0x25, // mov r5, #1 /* FLASH_CR_PG, FLASH_SR_BUSY */
1473 0x04, 0x26, // mov r6, #4 /* PGERR */
1475 0x23, 0x69, // ldr r3, [r4, #16] /* FLASH->CR */
1476 0x2B, 0x43, // orr r3, r5
1477 0x23, 0x61, // str r3, [r4, #16] /* FLASH->CR |= FLASH_CR_PG */
1478 0x03, 0x88, // ldrh r3, [r0] /* r3 = *sram */
1479 0x0B, 0x80, // strh r3, [r1] /* *flash = r3 */
1481 0xE3, 0x68, // ldr r3, [r4, #12] /* FLASH->SR */
1482 0x2B, 0x42, // tst r3, r5 /* FLASH_SR_BUSY */
1483 0xFC, 0xD0, // beq busy
1485 0x33, 0x42, // tst r3, r6 /* PGERR */
1486 0x04, 0xD1, // bne exit
1488 0x02, 0x30, // add r0, r0, #2 /* sram += 2 */
1489 0x02, 0x31, // add r1, r1, #2 /* flash += 2 */
1490 0x01, 0x3A, // sub r2, r2, #0x01 /* count-- */
1491 0x00, 0x2A, // cmp r2, #0
1492 0xF0, 0xD1, // bne write_half_word
1494 0x23, 0x69, // ldr r3, [r4, #16] /* FLASH->CR */
1495 0xAB, 0x43, // bic r3, r5
1496 0x23, 0x61, // str r3, [r4, #16] /* FLASH->CR &= ~FLASH_CR_PG */
1497 0x00, 0xBE, // bkpt #0x00
1498 0x00, 0x20, 0x02, 0x40, /* STM32_FLASH_BASE: .word 0x40022000 */
1501 static const uint8_t loader_code_stm32l[] = {
1503 /* openocd.git/contrib/loaders/flash/stm32lx.S
1504 r0, input, source addr
1505 r1, input, dest addr
1506 r2, input, word count
1507 r2, output, remaining word count
1512 0x50, 0xf8, 0x04, 0xcb,
1513 0x41, 0xf8, 0x04, 0xcb,
1521 static const uint8_t loader_code_stm32l0[] = {
1524 r0, input, source addr
1525 r1, input, dest addr
1526 r2, input, word count
1527 r2, output, remaining word count
1543 static const uint8_t loader_code_stm32f4[] = {
1544 // flashloaders/stm32f4.s
1553 0x14, 0xf0, 0x01, 0x0f,
1555 0x00, 0xf1, 0x04, 0x00,
1556 0x01, 0xf1, 0x04, 0x01,
1557 0xa2, 0xf1, 0x01, 0x02,
1562 0x00, 0x3c, 0x02, 0x40,
1565 static const uint8_t loader_code_stm32f4_lv[] = {
1566 // flashloaders/stm32f4lv.s
1575 0x14, 0xf0, 0x01, 0x0f,
1577 0x00, 0xf1, 0x01, 0x00,
1578 0x01, 0xf1, 0x01, 0x01,
1579 0xa2, 0xf1, 0x01, 0x02,
1585 0x00, 0x3c, 0x02, 0x40,
1588 static const uint8_t loader_code_stm32l4[] = {
1589 // flashloaders/stm32l4.s
1590 0x08, 0x4b, // start: ldr r3, [pc, #32] ; <flash_base>
1591 0x72, 0xb1, // next: cbz r2, <done>
1592 0x04, 0x68, // ldr r4, [r0, #0]
1593 0x45, 0x68, // ldr r5, [r0, #4]
1594 0x0c, 0x60, // str r4, [r1, #0]
1595 0x4d, 0x60, // str r5, [r1, #4]
1596 0x5c, 0x8a, // wait: ldrh r4, [r3, #18]
1597 0x14, 0xf0, 0x01, 0x0f, // tst.w r4, #1
1598 0xfb, 0xd1, // bne.n <wait>
1599 0x00, 0xf1, 0x08, 0x00, // add.w r0, r0, #8
1600 0x01, 0xf1, 0x08, 0x01, // add.w r1, r1, #8
1601 0xa2, 0xf1, 0x01, 0x02, // sub.w r2, r2, #1
1602 0xef, 0xe7, // b.n <next>
1603 0x00, 0xbe, // done: bkpt 0x0000
1604 0x00, 0x20, 0x02, 0x40 // flash_base: .word 0x40022000
1607 static const uint8_t loader_code_stm32f7[] = {
1612 0xbf, 0xf3, 0x4f, 0x8f, // DSB Memory barrier for in order flash write
1614 0x14, 0xf0, 0x01, 0x0f,
1616 0x00, 0xf1, 0x04, 0x00,
1617 0x01, 0xf1, 0x04, 0x01,
1618 0xa2, 0xf1, 0x01, 0x02,
1620 0x00, 0xbe, // bkpt #0x00
1621 0x00, 0x3c, 0x02, 0x40,
1624 const uint8_t* loader_code;
1627 if (sl->chip_id == STM32_CHIPID_L1_MEDIUM || sl->chip_id == STM32_CHIPID_L1_CAT2
1628 || sl->chip_id == STM32_CHIPID_L1_MEDIUM_PLUS || sl->chip_id == STM32_CHIPID_L1_HIGH
1629 || sl->chip_id == STM32_CHIPID_L152_RE) { /* stm32l */
1630 loader_code = loader_code_stm32l;
1631 loader_size = sizeof(loader_code_stm32l);
1632 } else if (sl->core_id == STM32VL_CORE_ID
1633 || sl->chip_id == STM32_CHIPID_F3
1634 || sl->chip_id == STM32_CHIPID_F3_SMALL
1635 || sl->chip_id == STM32_CHIPID_F303_HIGH
1636 || sl->chip_id == STM32_CHIPID_F37x
1637 || sl->chip_id == STM32_CHIPID_F334) {
1638 loader_code = loader_code_stm32vl;
1639 loader_size = sizeof(loader_code_stm32vl);
1640 } else if (sl->chip_id == STM32_CHIPID_F2 || sl->chip_id == STM32_CHIPID_F4 || (sl->chip_id == STM32_CHIPID_F4_DE) ||
1641 sl->chip_id == STM32_CHIPID_F4_LP || sl->chip_id == STM32_CHIPID_F4_HD || (sl->chip_id == STM32_CHIPID_F411RE) ||
1642 (sl->chip_id == STM32_CHIPID_F446) || (sl->chip_id == STM32_CHIPID_F4_DSI)){
1643 int voltage = stlink_target_voltage(sl);
1644 if (voltage == -1) {
1645 printf("Failed to read Target voltage\n");
1647 } else if (voltage > 2700) {
1648 loader_code = loader_code_stm32f4;
1649 loader_size = sizeof(loader_code_stm32f4);
1651 loader_code = loader_code_stm32f4_lv;
1652 loader_size = sizeof(loader_code_stm32f4_lv);
1654 } else if (sl->chip_id == STM32_CHIPID_F7){
1655 loader_code = loader_code_stm32f7;
1656 loader_size = sizeof(loader_code_stm32f7);
1657 } else if (sl->chip_id == STM32_CHIPID_F0 || sl->chip_id == STM32_CHIPID_F04 || sl->chip_id == STM32_CHIPID_F0_CAN || sl->chip_id == STM32_CHIPID_F0_SMALL || sl->chip_id == STM32_CHIPID_F09X) {
1658 loader_code = loader_code_stm32f0;
1659 loader_size = sizeof(loader_code_stm32f0);
1660 } else if (sl->chip_id == STM32_CHIPID_L0) {
1661 loader_code = loader_code_stm32l0;
1662 loader_size = sizeof(loader_code_stm32l0);
1663 } else if (sl->chip_id == STM32_CHIPID_L4) {
1664 loader_code = loader_code_stm32l4;
1665 loader_size = sizeof(loader_code_stm32l4);
1667 ELOG("unknown coreid, not sure what flash loader to use, aborting!: %x\n", sl->core_id);
1671 memcpy(sl->q_buf, loader_code, loader_size);
1672 stlink_write_mem32(sl, sl->sram_base, loader_size);
1674 *addr = sl->sram_base;
1675 *size = loader_size;
1681 int stlink_fcheck_flash(stlink_t *sl, const char* path, stm32_addr_t addr) {
1682 /* check the contents of path are at addr */
1685 mapped_file_t mf = MAPPED_FILE_INITIALIZER;
1687 if (map_file(&mf, path) == -1)
1690 res = check_file(sl, &mf, addr);
1698 * Verify addr..addr+len is binary identical to base...base+len
1699 * @param sl stlink context
1700 * @param address stm device address
1701 * @param data host side buffer to check against
1702 * @param length how much
1703 * @return 0 for success, -ve for failure
1705 int stlink_verify_write_flash(stlink_t *sl, stm32_addr_t address, uint8_t *data, unsigned length) {
1707 size_t cmp_size = (sl->flash_pgsz > 0x1800)? 0x1800:sl->flash_pgsz;
1708 ILOG("Starting verification of write complete\n");
1709 for (off = 0; off < length; off += cmp_size) {
1710 size_t aligned_size;
1712 /* adjust last page size */
1713 if ((off + cmp_size) > length)
1714 cmp_size = length - off;
1716 aligned_size = cmp_size;
1717 if (aligned_size & (4 - 1))
1718 aligned_size = (cmp_size + 4) & ~(4 - 1);
1720 stlink_read_mem32(sl, address + off, aligned_size);
1722 if (memcmp(sl->q_buf, data + off, cmp_size)) {
1723 ELOG("Verification of flash failed at offset: %zd\n", off);
1727 ILOG("Flash written and verified! jolly good!\n");
1732 int stm32l1_write_half_pages(stlink_t *sl, stm32_addr_t addr, uint8_t* base, uint32_t len, uint32_t pagesize)
1735 unsigned int num_half_pages = len / pagesize;
1737 uint32_t flash_regs_base;
1740 if (sl->chip_id == STM32_CHIPID_L0) {
1741 flash_regs_base = STM32L0_FLASH_REGS_ADDR;
1743 flash_regs_base = STM32L_FLASH_REGS_ADDR;
1746 ILOG("Starting Half page flash write for STM32L core id\n");
1747 /* flash loader initialization */
1748 if (init_flash_loader(sl, &fl) == -1) {
1749 WLOG("init_flash_loader() == -1\n");
1752 /* Unlock already done */
1753 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1754 val |= (1 << FLASH_L1_FPRG);
1755 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1757 val |= (1 << FLASH_L1_PROG);
1758 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1760 stlink_read_debug32(sl, flash_regs_base + FLASH_SR_OFF, &val);
1761 } while ((val & (1 << 0)) != 0);
1763 for (count = 0; count < num_half_pages; count ++) {
1764 if (run_flash_loader(sl, &fl, addr + count * pagesize, base + count * pagesize, pagesize) == -1) {
1765 WLOG("l1_run_flash_loader(%#zx) failed! == -1\n", addr + count * pagesize);
1766 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1767 val &= ~((1 << FLASH_L1_FPRG) |(1 << FLASH_L1_PROG));
1768 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1771 /* wait for sr.busy to be cleared */
1772 if (sl->verbose >= 1) {
1773 /* show progress. writing procedure is slow
1774 and previous errors are misleading */
1775 fprintf(stdout, "\r%3u/%u halfpages written", count + 1, num_half_pages);
1779 stlink_read_debug32(sl, flash_regs_base + FLASH_SR_OFF, &val);
1780 } while ((val & (1 << 0)) != 0);
1782 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1783 val &= ~(1 << FLASH_L1_PROG);
1784 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1785 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1786 val &= ~(1 << FLASH_L1_FPRG);
1787 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1792 int stlink_write_flash(stlink_t *sl, stm32_addr_t addr, uint8_t* base, uint32_t len, uint8_t eraseonly) {
1795 ILOG("Attempting to write %d (%#x) bytes to stm32 address: %u (%#x)\n",
1796 len, len, addr, addr);
1797 /* check addr range is inside the flash */
1798 stlink_calculate_pagesize(sl, addr);
1799 if (addr < sl->flash_base) {
1800 ELOG("addr too low %#x < %#x\n", addr, sl->flash_base);
1802 } else if ((addr + len) < addr) {
1803 ELOG("addr overruns\n");
1805 } else if ((addr + len) > (sl->flash_base + sl->flash_size)) {
1806 ELOG("addr too high\n");
1808 } else if (addr & 1) {
1809 ELOG("unaligned addr 0x%x\n", addr);
1811 } else if (len & 1) {
1812 WLOG("unaligned len 0x%x -- padding with zero\n", len);
1814 } else if (addr & (sl->flash_pgsz - 1)) {
1815 ELOG("addr not a multiple of pagesize, not supported\n");
1819 // Make sure we've loaded the context with the chip details
1821 /* erase each page */
1823 for (off = 0; off < len; off += stlink_calculate_pagesize(sl, addr + off)) {
1824 /* addr must be an addr inside the page */
1825 if (stlink_erase_flash_page(sl, addr + off) == -1) {
1826 ELOG("Failed to erase_flash_page(%#zx) == -1\n", addr + off);
1829 fprintf(stdout,"\rFlash page at addr: 0x%08lx erased",
1830 (unsigned long)addr + off);
1834 fprintf(stdout,"\n");
1835 ILOG("Finished erasing %d pages of %d (%#x) bytes\n",
1836 page_count, sl->flash_pgsz, sl->flash_pgsz);
1841 if ((sl->flash_type == FLASH_TYPE_F4) || (sl->flash_type == FLASH_TYPE_L4)) {
1842 /* todo: check write operation */
1844 ILOG("Starting Flash write for F2/F4/L4\n");
1845 /* flash loader initialization */
1846 if (init_flash_loader(sl, &fl) == -1) {
1847 ELOG("init_flash_loader() == -1\n");
1851 /* First unlock the cr */
1852 unlock_flash_if(sl);
1854 /* TODO: Check that Voltage range is 2.7 - 3.6 V */
1855 if (sl->chip_id != STM32_CHIPID_L4) {
1856 /* set parallelisim to 32 bit*/
1857 int voltage = stlink_target_voltage(sl);
1858 if (voltage == -1) {
1859 printf("Failed to read Target voltage\n");
1861 } else if (voltage > 2700) {
1862 printf("enabling 32-bit flash writes\n");
1863 write_flash_cr_psiz(sl, 2);
1865 printf("Target voltage (%d mV) too low for 32-bit flash, using 8-bit flash writes\n", voltage);
1866 write_flash_cr_psiz(sl, 0);
1869 /* L4 does not have a byte-write mode */
1870 int voltage = stlink_target_voltage(sl);
1871 if (voltage == -1) {
1872 printf("Failed to read Target voltage\n");
1874 } else if (voltage < 1710) {
1875 printf("Target voltage (%d mV) too low for flash writes!\n", voltage);
1880 /* set programming mode */
1881 set_flash_cr_pg(sl);
1883 for(off = 0; off < len;) {
1884 size_t size = len - off > 0x8000 ? 0x8000 : len - off;
1886 printf("size: %zu\n", size);
1888 if (run_flash_loader(sl, &fl, addr + off, base + off, size) == -1) {
1889 ELOG("run_flash_loader(%#zx) failed! == -1\n", addr + off);
1901 else if (sl->flash_type == FLASH_TYPE_L0) {
1902 /* use fast word write. todo: half page. */
1904 uint32_t flash_regs_base;
1907 if (sl->chip_id == STM32_CHIPID_L0) {
1908 flash_regs_base = STM32L0_FLASH_REGS_ADDR;
1909 pagesize = L0_WRITE_BLOCK_SIZE;
1911 flash_regs_base = STM32L_FLASH_REGS_ADDR;
1912 pagesize = L1_WRITE_BLOCK_SIZE;
1915 /* todo: check write operation */
1917 /* disable pecr protection */
1918 stlink_write_debug32(sl, flash_regs_base + FLASH_PEKEYR_OFF, 0x89abcdef);
1919 stlink_write_debug32(sl, flash_regs_base + FLASH_PEKEYR_OFF, 0x02030405);
1921 /* check pecr.pelock is cleared */
1922 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1923 if (val & (1 << 0)) {
1924 fprintf(stderr, "pecr.pelock not clear\n");
1928 /* unlock program memory */
1929 stlink_write_debug32(sl, flash_regs_base + FLASH_PRGKEYR_OFF, 0x8c9daebf);
1930 stlink_write_debug32(sl, flash_regs_base + FLASH_PRGKEYR_OFF, 0x13141516);
1932 /* check pecr.prglock is cleared */
1933 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1934 if (val & (1 << 1)) {
1935 fprintf(stderr, "pecr.prglock not clear\n");
1939 if (len > pagesize) {
1940 if (stm32l1_write_half_pages(sl, addr, base, len, pagesize) == -1) {
1941 /* This may happen on a blank device! */
1942 WLOG("\nwrite_half_pages failed == -1\n");
1944 off = (len / pagesize)*pagesize;
1948 /* write remainingword in program memory */
1949 for ( ; off < len; off += sizeof(uint32_t)) {
1952 fprintf(stdout, "\r");
1954 if ((off % sl->flash_pgsz) > (sl->flash_pgsz -5)) {
1955 fprintf(stdout, "\r%3zd/%3zd pages written",
1956 off/sl->flash_pgsz, len/sl->flash_pgsz);
1960 write_uint32((unsigned char*) &data, *(uint32_t*) (base + off));
1961 stlink_write_debug32(sl, addr + off, data);
1963 /* wait for sr.busy to be cleared */
1965 stlink_read_debug32(sl, flash_regs_base + FLASH_SR_OFF, &val);
1966 } while ((val & (1 << 0)) != 0);
1968 /* todo: check redo write operation */
1971 fprintf(stdout, "\n");
1972 /* reset lock bits */
1973 stlink_read_debug32(sl, flash_regs_base + FLASH_PECR_OFF, &val);
1974 val |= (1 << 0) | (1 << 1) | (1 << 2);
1975 stlink_write_debug32(sl, flash_regs_base + FLASH_PECR_OFF, val);
1976 } else if (sl->flash_type == FLASH_TYPE_F0) {
1977 ILOG("Starting Flash write for VL/F0/F3 core id\n");
1978 /* flash loader initialization */
1979 if (init_flash_loader(sl, &fl) == -1) {
1980 ELOG("init_flash_loader() == -1\n");
1984 int write_block_count = 0;
1985 for (off = 0; off < len; off += sl->flash_pgsz) {
1986 /* adjust last write size */
1987 size_t size = sl->flash_pgsz;
1988 if ((off + sl->flash_pgsz) > len) size = len - off;
1990 /* unlock and set programming mode */
1991 unlock_flash_if(sl);
1992 set_flash_cr_pg(sl);
1993 //DLOG("Finished setting flash cr pg, running loader!\n");
1994 if (run_flash_loader(sl, &fl, addr + off, base + off, size) == -1) {
1995 ELOG("run_flash_loader(%#zx) failed! == -1\n", addr + off);
1999 if (sl->verbose >= 1) {
2000 /* show progress. writing procedure is slow
2001 and previous errors are misleading */
2002 fprintf(stdout, "\r%3u/%lu pages written", write_block_count++, (unsigned long)len/sl->flash_pgsz);
2006 fprintf(stdout, "\n");
2008 ELOG("unknown coreid, not sure how to write: %x\n", sl->core_id);
2012 return stlink_verify_write_flash(sl, addr, base, len);
2016 * Write the given binary file into flash at address "addr"
2018 * @param path readable file path, should be binary image
2019 * @param addr where to start writing
2020 * @return 0 on success, -ve on failure.
2022 int stlink_fwrite_flash(stlink_t *sl, const char* path, stm32_addr_t addr) {
2023 /* write the file in flash at addr */
2025 unsigned int num_empty, index, val;
2026 unsigned char erased_pattern;
2027 mapped_file_t mf = MAPPED_FILE_INITIALIZER;
2029 if (map_file(&mf, path) == -1) {
2030 ELOG("map_file() == -1\n");
2034 if (sl->flash_type == FLASH_TYPE_L0)
2035 erased_pattern = 0x00;
2037 erased_pattern = 0xff;
2040 for(num_empty = 0; num_empty != mf.len; ++num_empty) {
2041 if (mf.base[--index] != erased_pattern) {
2045 /* Round down to words */
2046 num_empty -= (num_empty & 3);
2047 if(num_empty != 0) {
2048 ILOG("Ignoring %d bytes of 0x%02x at end of file\n", num_empty, erased_pattern);
2050 err = stlink_write_flash(sl, addr, mf.base, num_empty == mf.len? mf.len : mf.len - num_empty, num_empty == mf.len);
2052 stlink_read_debug32(sl, addr, &val);
2053 stlink_write_reg(sl, val, 13);
2054 /* Set PC to the reset routine*/
2055 stlink_read_debug32(sl, addr + 4, &val);
2056 stlink_write_reg(sl, val, 15);
2062 int run_flash_loader(stlink_t *sl, flash_loader_t* fl, stm32_addr_t target, const uint8_t* buf, size_t size) {
2068 DLOG("Running flash loader, write address:%#x, size: %zd\n", target, size);
2069 // FIXME This can never return -1
2070 if (write_buffer_to_sram(sl, fl, buf, size) == -1) {
2072 ELOG("write_buffer_to_sram() == -1\n");
2076 if (sl->flash_type == FLASH_TYPE_F0) {
2077 count = size / sizeof(uint16_t);
2078 if (size % sizeof(uint16_t))
2080 } else if (sl->flash_type == FLASH_TYPE_F4 || sl->flash_type == FLASH_TYPE_L0) {
2081 count = size / sizeof(uint32_t);
2082 if (size % sizeof(uint32_t))
2084 } else if (sl->flash_type == FLASH_TYPE_L4) {
2085 count = size / sizeof(uint64_t);
2086 if (size % sizeof(uint64_t))
2089 fprintf(stderr, "unknown coreid 0x%x, don't know what flash loader to use\n", sl->core_id);
2094 stlink_write_reg(sl, fl->buf_addr, 0); /* source */
2095 stlink_write_reg(sl, target, 1); /* target */
2096 stlink_write_reg(sl, count, 2); /* count */
2097 stlink_write_reg(sl, 0, 3); /* flash bank 0 (input), only used on F0, but armless fopr others */
2098 stlink_write_reg(sl, fl->loader_addr, 15); /* pc register */
2103 #define WAIT_ROUNDS 10000
2104 /* wait until done (reaches breakpoint) */
2105 for (i = 0; i < WAIT_ROUNDS; i++) {
2107 if (is_core_halted(sl))
2111 if (i >= WAIT_ROUNDS) {
2112 ELOG("flash loader run error\n");
2116 /* check written byte count */
2117 stlink_read_reg(sl, 2, &rr);
2119 fprintf(stderr, "write error, count == %u\n", rr.r[2]);