1 /**
2 * @file xmc4_flash.c
3 * @date 2016-01-08
4 *
5 * @cond
6 *********************************************************************************************************************
7 * XMClib v2.1.24 - XMC Peripheral Driver Library
8 *
9 * Copyright (c) 2015-2019, Infineon Technologies AG
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without modification,are permitted provided that the
13 * following conditions are met:
14 *
15 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
19 * disclaimer in the documentation and/or other materials provided with the distribution.
20 *
21 * Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote
22 * products derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY,OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * To improve the quality of the software, users are encouraged to share modifications, enhancements or bug fixes with
33 * Infineon Technologies AG dave@infineon.com).
34 *********************************************************************************************************************
35 *
36 * Change History
37 * --------------
38 *
39 * 2015-02-10:
40 * - Initial <br>
41 *
42 * 2015-06-20:
43 * - Removed definition of GetDriverVersion API
44 *
45 * 2015-08-17:
46 * - Added the below API's to the public interface.
47 * 1. XMC_FLASH_Reset
48 * 2. XMC_FLASH_ErasePhysicalSector
49 * 3. XMC_FLASH_EraseUCB
50 * 4. XMC_FLASH_ResumeProtection
51 * 5. XMC_FLASH_RepairPhysicalSector
52 *
53 * 2016-01-08:
54 * - Wait until operation is finished for the next functions:
55 * 1. XMC_FLASH_InstallProtection
56 * 2. XMC_FLASH_ConfirmProtection
57 * 3. XMC_FLASH_ProgramPage
58 * 4. XMC_FLASH_EraseSector
59 * 5. XMC_FLASH_ErasePhysicalSector
60 * 6. XMC_FLASH_EraseUCB
61 * - Fix XMC_FLASH_VerifyReadProtection and XMC_FLASH_VerifyWriteProtection
62 *
63 * 2018-02-08
64 * - Added implementation of XMC_FLASH_InstallBMI()
65 *
66 * @endcond
67 *
68 */
69
70 #include "xmc_flash.h"
71
72 #if UC_FAMILY == XMC4
73
74 /*********************************************************************************************************************
75 * MACROS
76 ********************************************************************************************************************/
77
78 #define XMC_FLASH_PROTECTION_CONFIGURATION_WORDS (8UL) /* Used to upadte the assembly buffer during protection
79 configuration */
80 #define XMC_FLASH_BMI_STRING_WORDS (10UL) /* Used to upadte the assembly buffer during BMI String
81 configuration */
82
83 #define XMC_FLASH_PROT_CONFIRM_OFFSET (512UL) /* Offset address for UCB page */
84 #define XMC_FLASH_PROT_CONFIRM_WORDS (4UL)
85 #define XMC_FLASH_PROT_CONFIRM_CODE (0x8AFE15C3UL)
86
87 /*********************************************************************************************************************
88 * LOCAL FUNCTIONS
89 ********************************************************************************************************************/
90 void XMC_FLASH_lEnterPageModeCommand(void);
91 void XMC_FLASH_lLoadPageCommand(uint32_t low_word, uint32_t high_word);
92 void XMC_FLASH_lWritePageCommand(uint32_t *page_start_address);
93 void XMC_FLASH_lWriteUCBPageCommand(uint32_t *page_start_address);
94 void XMC_FLASH_lEraseSectorCommand(uint32_t *sector_start_address);
95 void XMC_FLASH_lDisableSectorWriteProtectionCommand(uint32_t user, uint32_t password_0, uint32_t password_1);
96 void XMC_FLASH_lDisableReadProtectionCommand(uint32_t password_0, uint32_t password_1);
97 void XMC_FLASH_lRepairPhysicalSectorCommand(void);
98 void XMC_FLASH_lErasePhysicalSectorCommand(uint32_t *sector_start_address);
99 void XMC_FLASH_lClearStatusCommand(void);
100
101 /*
102 * Command to program the PFLASH in to page mode, so that assembly buffer is used
103 */
XMC_FLASH_lEnterPageModeCommand(void)104 void XMC_FLASH_lEnterPageModeCommand(void)
105 {
106 volatile uint32_t *address;
107
108 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
109 *address = (uint32_t)0x50U;
110 }
111
112 /*
113 * Command to load the data into the page assembly buffer
114 */
XMC_FLASH_lLoadPageCommand(uint32_t low_word,uint32_t high_word)115 void XMC_FLASH_lLoadPageCommand(uint32_t low_word, uint32_t high_word)
116 {
117 volatile uint32_t *address;
118
119 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x55f0U);
120 *address = low_word;
121 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x55f4U);
122 *address = high_word;
123 }
124
125 /*
126 * Command to start the programming of one page with data from the assembly buffer
127 */
XMC_FLASH_lWritePageCommand(uint32_t * page_start_address)128 void XMC_FLASH_lWritePageCommand(uint32_t *page_start_address)
129 {
130 volatile uint32_t *address;
131
132 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
133 *address = 0xaaU;
134 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
135 *address = 0x55U;
136 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
137 *address = 0xa0U;
138 address = page_start_address;
139 *address = 0xaaU;
140 }
141
142 /*
143 * Command to start the programming of UCB page with data from the assembly buffer
144 */
XMC_FLASH_lWriteUCBPageCommand(uint32_t * page_start_address)145 void XMC_FLASH_lWriteUCBPageCommand(uint32_t *page_start_address)
146 {
147 volatile uint32_t *address;
148
149 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
150 *address = 0xaaU;
151 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
152 *address = 0x55U;
153 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
154 *address = 0xc0U;
155 address = page_start_address;
156 *address = 0xaaU;
157 }
158
159 /*
160 * Command to erase sector which is starting with the specified address
161 */
XMC_FLASH_lEraseSectorCommand(uint32_t * sector_start_address)162 void XMC_FLASH_lEraseSectorCommand(uint32_t *sector_start_address)
163 {
164 volatile uint32_t *address;
165
166 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
167 *address = 0xaaU;
168 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
169 *address = 0x55U;
170 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
171 *address = 0x80U;
172 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
173 *address = 0xaaU;
174 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
175 *address = 0x55U;
176 address = sector_start_address;
177 *address = 0x30U;
178 }
179
180
181 /*
182 * Command to temporarily disables the write protection belonging to the the USER specified, when passwords match with their
183 * configured values
184 */
XMC_FLASH_lDisableSectorWriteProtectionCommand(uint32_t user,uint32_t password_0,uint32_t password_1)185 void XMC_FLASH_lDisableSectorWriteProtectionCommand(uint32_t user, uint32_t password_0, uint32_t password_1)
186 {
187 volatile uint32_t *address;
188
189 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
190 *address = 0xaaU;
191 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
192 *address = 0x55U;
193 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x553cU);
194 *address = user;
195 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
196 *address = password_0;
197 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
198 *address = password_1;
199 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5558U);
200 *address = 0x05U;
201 }
202
203 /*
204 * Command to temporarily disables the read protection along with write protection, when passwords match with their
205 * configured values
206 */
XMC_FLASH_lDisableReadProtectionCommand(uint32_t password_0,uint32_t password_1)207 void XMC_FLASH_lDisableReadProtectionCommand(uint32_t password_0, uint32_t password_1)
208 {
209 volatile uint32_t *address;
210
211 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
212 *address = 0xaaU;
213 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
214 *address = 0x55U;
215 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x553cU);
216 *address = 0x00U;
217 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
218 *address = password_0;
219 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
220 *address = password_1;
221 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5558U);
222 *address = 0x08U;
223 }
224
225 /*
226 * Command to clear FSR.PROG and FSR.ERASE and the error flags in FSR such as PFOPER, SQER, PROER, PFDBER, ORIER, VER
227 */
XMC_FLASH_lClearStatusCommand(void)228 void XMC_FLASH_lClearStatusCommand(void)
229 {
230 volatile uint32_t *address;
231
232 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
233 *address = 0xf5U;
234 }
235
236 /*********************************************************************************************************************
237 * API IMPLEMENTATION
238 ********************************************************************************************************************/
239
240 /*
241 * This API shall clear Program, erase and error flags(PFOPER, SQER, PROER, PFDBER, ORIER, VER) of FSR register.
242 */
XMC_FLASH_ClearStatus(void)243 void XMC_FLASH_ClearStatus(void)
244 {
245 XMC_FLASH_lClearStatusCommand();
246 }
247
248 /*
249 * This API returns the FSR register value
250 */
XMC_FLASH_GetStatus(void)251 uint32_t XMC_FLASH_GetStatus(void)
252 {
253 return FLASH0->FSR;
254 }
255
256 /*
257 * This API enables the events which required to trigger the ISR
258 */
XMC_FLASH_EnableEvent(const uint32_t event_msk)259 void XMC_FLASH_EnableEvent(const uint32_t event_msk)
260 {
261 FLASH0->FCON |= event_msk;
262 }
263
264 /*
265 * This API disables the event generation
266 */
XMC_FLASH_DisableEvent(const uint32_t event_msk)267 void XMC_FLASH_DisableEvent(const uint32_t event_msk)
268 {
269 FLASH0->FCON &= ~event_msk;
270 }
271
272 /*
273 * This API write the PFLASH page
274 */
XMC_FLASH_ProgramPage(uint32_t * address,const uint32_t * data)275 void XMC_FLASH_ProgramPage(uint32_t *address, const uint32_t *data)
276 {
277 uint32_t idx;
278
279 XMC_FLASH_lClearStatusCommand();
280 XMC_FLASH_lEnterPageModeCommand();
281
282 for (idx = 0U; idx < XMC_FLASH_WORDS_PER_PAGE; idx += 2U)
283 {
284 XMC_FLASH_lLoadPageCommand(data[idx], data[idx + 1U]);
285 }
286
287 XMC_FLASH_lWritePageCommand(address);
288
289 /* wait until the operation is completed */
290 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
291 }
292
293 /*
294 * This API erase the logical sector
295 */
XMC_FLASH_EraseSector(uint32_t * address)296 void XMC_FLASH_EraseSector(uint32_t *address)
297 {
298 XMC_FLASH_lClearStatusCommand();
299 XMC_FLASH_lEraseSectorCommand(address);
300
301 /* wait until the operation is completed */
302 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
303 }
304
305 /*
306 * Command to erase physical sector which is starting with the specified address
307 */
XMC_FLASH_lErasePhysicalSectorCommand(uint32_t * sector_start_address)308 void XMC_FLASH_lErasePhysicalSectorCommand(uint32_t *sector_start_address)
309 {
310 volatile uint32_t *address;
311
312 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
313 *address = 0xaaU;
314 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
315 *address = 0x55U;
316 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
317 *address = 0x80U;
318 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
319 *address = 0xaaU;
320 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
321 *address = 0x55U;
322 address = sector_start_address;
323 *address = 0x40U;
324 }
325
326 /*
327 * Command to erase physical sector-4 which is starting with the specified address
328 * This command is only available if PROCON1.PRS = 1.
329 */
XMC_FLASH_lRepairPhysicalSectorCommand(void)330 void XMC_FLASH_lRepairPhysicalSectorCommand(void)
331 {
332 volatile uint32_t *address;
333
334 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
335 *address = 0xaaU;
336 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
337 *address = 0x55U;
338 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
339 *address = 0x80U;
340 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
341 *address = 0xaaU;
342 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
343 *address = 0x55U;
344 address = XMC_FLASH_PHY_SECTOR_4;
345 *address = 0x40U;
346 }
347
348 /*
349 * This API erase the physical sector
350 */
XMC_FLASH_ErasePhysicalSector(uint32_t * address)351 void XMC_FLASH_ErasePhysicalSector(uint32_t *address)
352 {
353 XMC_FLASH_lClearStatusCommand();
354 XMC_FLASH_lErasePhysicalSectorCommand(address);
355
356 /* wait until the operation is completed */
357 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
358 }
359
360 /*
361 * This API repair the physical sector
362 */
XMC_FLASH_RepairPhysicalSector(void)363 void XMC_FLASH_RepairPhysicalSector(void)
364 {
365 XMC_FLASH_lClearStatusCommand();
366 XMC_FLASH_lRepairPhysicalSectorCommand();
367 }
368
369 /*
370 * Command to erase UCB sector which is starting with the specified address
371 */
XMC_FLASH_EraseUCB(uint32_t * ucb_sector_start_address)372 void XMC_FLASH_EraseUCB(uint32_t *ucb_sector_start_address)
373 {
374 volatile uint32_t *address;
375
376 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
377 *address = 0xaaU;
378 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
379 *address = 0x55U;
380 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
381 *address = 0x80U;
382 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
383 *address = 0xaaU;
384 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0xaaa8U);
385 *address = 0x55U;
386 address = ucb_sector_start_address;
387 *address = 0xc0U;
388
389 /* wait until the operation is completed */
390 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
391 }
392
393 /*
394 * Command to reset the status of the PFLASH
395 */
XMC_FLASH_Reset(void)396 void XMC_FLASH_Reset(void)
397 {
398 volatile uint32_t *address;
399
400 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
401 *address = 0xf0U;
402 }
403
404 #define BMI_STRING_BYTE_CNT 30
405
XMC_FLASH_InstallBMI(XMC_FLASH_BMI_STRING_t * const bmi_string)406 void XMC_FLASH_InstallBMI(XMC_FLASH_BMI_STRING_t *const bmi_string)
407 {
408 uint32_t checksum = 0;
409 for (int i = 0; i < BMI_STRING_BYTE_CNT; ++i)
410 {
411 checksum ^= ((const uint8_t *)bmi_string)[i];
412 }
413
414 bmi_string->reserved = checksum;
415
416 XMC_FLASH_lEnterPageModeCommand();
417
418 XMC_FLASH_lLoadPageCommand(((const uint32_t *)bmi_string)[0], ((const uint32_t *)bmi_string)[1]);
419 XMC_FLASH_lLoadPageCommand(((const uint32_t *)bmi_string)[2], ((const uint32_t *)bmi_string)[3]);
420 XMC_FLASH_lLoadPageCommand(((const uint32_t *)bmi_string)[4], ((const uint32_t *)bmi_string)[5]);
421 XMC_FLASH_lLoadPageCommand(((const uint32_t *)bmi_string)[6], ((const uint32_t *)bmi_string)[7]);
422 XMC_FLASH_lLoadPageCommand(((const uint32_t *)bmi_string)[8], 0);
423
424 for (uint32_t idx = 0U; idx < (XMC_FLASH_WORDS_PER_PAGE - XMC_FLASH_BMI_STRING_WORDS); idx += 2U)
425 {
426 XMC_FLASH_lLoadPageCommand(0UL, 0UL);
427 }
428
429 XMC_FLASH_lWriteUCBPageCommand((uint32_t *)((uint32_t)XMC_FLASH_UCB2 + XMC_FLASH_BYTES_PER_PAGE));
430
431 /* wait until the operation is completed */
432 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
433 }
434
435 /*
436 * This API install the global read and sector write protection for the specified user
437 */
XMC_FLASH_InstallProtection(uint8_t user,uint32_t protection_mask,uint32_t password_0,uint32_t password_1)438 void XMC_FLASH_InstallProtection(uint8_t user,
439 uint32_t protection_mask,
440 uint32_t password_0,
441 uint32_t password_1)
442 {
443 uint32_t idx;
444
445 XMC_ASSERT(" XMC_FLASH_ConfigureProtection: User level out of range", (user < 3U))
446
447 XMC_FLASH_lEnterPageModeCommand();
448
449 XMC_FLASH_lLoadPageCommand(protection_mask, 0UL);
450 XMC_FLASH_lLoadPageCommand(protection_mask, 0UL);
451 XMC_FLASH_lLoadPageCommand(password_0, password_1);
452 XMC_FLASH_lLoadPageCommand(password_0, password_1);
453
454 for (idx = 0U; idx < (XMC_FLASH_WORDS_PER_PAGE - XMC_FLASH_PROTECTION_CONFIGURATION_WORDS); idx += 2U)
455 {
456 XMC_FLASH_lLoadPageCommand(0UL, 0UL);
457 }
458
459 XMC_FLASH_lWriteUCBPageCommand((uint32_t *)((uint32_t)XMC_FLASH_UCB0 + (user * XMC_FLASH_BYTES_PER_UCB)));
460
461 /* wait until the operation is completed */
462 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
463 }
464
465 /*
466 * This API confirm the protection. So that This sectors are locked with the specified protection.
467 */
XMC_FLASH_ConfirmProtection(uint8_t user)468 void XMC_FLASH_ConfirmProtection(uint8_t user)
469 {
470 uint32_t idx;
471
472 XMC_ASSERT(" XMC_FLASH_ConfirmProtection: User level out of range", (user < 3U))
473
474 XMC_FLASH_lEnterPageModeCommand();
475
476 XMC_FLASH_lLoadPageCommand(XMC_FLASH_PROT_CONFIRM_CODE, 0U);
477 XMC_FLASH_lLoadPageCommand(XMC_FLASH_PROT_CONFIRM_CODE, 0U);
478
479 /* Fill the rest of page buffer with zeros*/
480 for (idx = 0UL; idx < (XMC_FLASH_WORDS_PER_PAGE - XMC_FLASH_PROT_CONFIRM_WORDS); idx += 2U)
481 {
482 XMC_FLASH_lLoadPageCommand(0UL, 0UL);
483 }
484
485 XMC_FLASH_lWriteUCBPageCommand((uint32_t *)((uint32_t)XMC_FLASH_UCB0 +
486 (user * XMC_FLASH_BYTES_PER_UCB) + XMC_FLASH_PROT_CONFIRM_OFFSET));
487
488 /* wait until the operation is completed */
489 while ((FLASH0->FSR & (uint32_t)FLASH_FSR_PBUSY_Msk) != 0U){}
490 }
491
492 /*
493 * This API verify read protection configuration. And returns true if passwords are matching.
494 */
XMC_FLASH_VerifyReadProtection(uint32_t password_0,uint32_t password_1)495 bool XMC_FLASH_VerifyReadProtection(uint32_t password_0, uint32_t password_1)
496 {
497 bool status = false;
498
499 /* Check if read protection is installed */
500 if ((XMC_FLASH_GetStatus() & (uint32_t)XMC_FLASH_STATUS_READ_PROTECTION_INSTALLED) != 0U)
501 {
502 XMC_FLASH_lClearStatusCommand();
503 XMC_FLASH_lDisableReadProtectionCommand(password_0, password_1);
504
505 status = (bool)(XMC_FLASH_GetStatus() & (uint32_t)XMC_FLASH_STATUS_READ_PROTECTION_DISABLED_STATE);
506 }
507
508 return status;
509 }
510
511 /*
512 * This API verify sector write protection configuration. And returns true if passwords are matching for the
513 * specified user.
514 */
XMC_FLASH_VerifyWriteProtection(uint32_t user,uint32_t protection_mask,uint32_t password_0,uint32_t password_1)515 bool XMC_FLASH_VerifyWriteProtection(uint32_t user,
516 uint32_t protection_mask,
517 uint32_t password_0,
518 uint32_t password_1)
519 {
520 bool status = false;
521 uint32_t *flash_procon_ptr = (uint32_t *)(void*)(&(FLASH0->PROCON0) + user);
522
523 XMC_ASSERT(" XMC_FLASH_VerifyWriteProtection: User level out of range", (user < 2U))
524
525 /* Check if write protection for selected user is installed */
526 if ((XMC_FLASH_GetStatus() & (uint32_t)((uint32_t)1U << (uint32_t)((uint32_t)FLASH_FSR_WPROIN0_Pos + user))) != 0U)
527 {
528 XMC_FLASH_lClearStatusCommand();
529 XMC_FLASH_lDisableSectorWriteProtectionCommand(user, password_0, password_1);
530
531 status = (bool)((XMC_FLASH_GetStatus() & (uint32_t)((uint32_t)1U << (uint32_t)((uint32_t)FLASH_FSR_WPRODIS0_Pos + user)))) &&
532 (*flash_procon_ptr == (protection_mask & (uint32_t)(~(uint32_t)XMC_FLASH_PROTECTION_READ_GLOBAL)));
533 }
534
535 return status;
536 }
537
538 /*
539 * Command to enables the protection as it was configured
540 */
XMC_FLASH_ResumeProtection(void)541 void XMC_FLASH_ResumeProtection(void)
542 {
543 volatile uint32_t *address;
544
545 address = (uint32_t *)(XMC_FLASH_UNCACHED_BASE + 0x5554U);
546 *address = 0x5eU;
547 }
548
549 #endif
550
