1 /**************************************************************************//** 2 * @file core_cm0plus.h 3 * @brief CMSIS Cortex-M0+ Core Peripheral Access Layer Header File 4 * @version V4.30 5 * @date 20. October 2015 6 ******************************************************************************/ 7 /* Copyright (c) 2009 - 2015 ARM LIMITED 8 9 All rights reserved. 10 Redistribution and use in source and binary forms, with or without 11 modification, are permitted provided that the following conditions are met: 12 - Redistributions of source code must retain the above copyright 13 notice, this list of conditions and the following disclaimer. 14 - Redistributions in binary form must reproduce the above copyright 15 notice, this list of conditions and the following disclaimer in the 16 documentation and/or other materials provided with the distribution. 17 - Neither the name of ARM nor the names of its contributors may be used 18 to endorse or promote products derived from this software without 19 specific prior written permission. 20 * 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE 25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 POSSIBILITY OF SUCH DAMAGE. 32 ---------------------------------------------------------------------------*/ 33 34 35 #if defined ( __ICCARM__ ) 36 #pragma system_include /* treat file as system include file for MISRA check */ 37 #elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050) 38 #pragma clang system_header /* treat file as system include file */ 39 #endif 40 41 #ifndef __CORE_CM0PLUS_H_GENERIC 42 #define __CORE_CM0PLUS_H_GENERIC 43 44 #include <stdint.h> 45 46 #ifdef __cplusplus 47 extern "C" { 48 #endif 49 50 /** 51 \page CMSIS_MISRA_Exceptions MISRA-C:2004 Compliance Exceptions 52 CMSIS violates the following MISRA-C:2004 rules: 53 54 \li Required Rule 8.5, object/function definition in header file.<br> 55 Function definitions in header files are used to allow 'inlining'. 56 57 \li Required Rule 18.4, declaration of union type or object of union type: '{...}'.<br> 58 Unions are used for effective representation of core registers. 59 60 \li Advisory Rule 19.7, Function-like macro defined.<br> 61 Function-like macros are used to allow more efficient code. 62 */ 63 64 65 /******************************************************************************* 66 * CMSIS definitions 67 ******************************************************************************/ 68 /** 69 \ingroup Cortex-M0+ 70 @{ 71 */ 72 73 /* CMSIS CM0+ definitions */ 74 #define __CM0PLUS_CMSIS_VERSION_MAIN (0x04U) /*!< [31:16] CMSIS HAL main version */ 75 #define __CM0PLUS_CMSIS_VERSION_SUB (0x1EU) /*!< [15:0] CMSIS HAL sub version */ 76 #define __CM0PLUS_CMSIS_VERSION ((__CM0PLUS_CMSIS_VERSION_MAIN << 16U) | \ 77 __CM0PLUS_CMSIS_VERSION_SUB ) /*!< CMSIS HAL version number */ 78 79 #define __CORTEX_M (0x00U) /*!< Cortex-M Core */ 80 81 82 #if defined ( __CC_ARM ) 83 #define __ASM __asm /*!< asm keyword for ARM Compiler */ 84 #define __INLINE __inline /*!< inline keyword for ARM Compiler */ 85 #define __STATIC_INLINE static __inline 86 87 #elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050) 88 #define __ASM __asm /*!< asm keyword for ARM Compiler */ 89 #define __INLINE __inline /*!< inline keyword for ARM Compiler */ 90 #define __STATIC_INLINE static __inline 91 92 #elif defined ( __GNUC__ ) 93 #define __ASM __asm /*!< asm keyword for GNU Compiler */ 94 #define __INLINE inline /*!< inline keyword for GNU Compiler */ 95 #define __STATIC_INLINE static inline 96 97 #elif defined ( __ICCARM__ ) 98 #define __ASM __asm /*!< asm keyword for IAR Compiler */ 99 #define __INLINE inline /*!< inline keyword for IAR Compiler. Only available in High optimization mode! */ 100 #define __STATIC_INLINE static inline 101 102 #elif defined ( __TMS470__ ) 103 #define __ASM __asm /*!< asm keyword for TI CCS Compiler */ 104 #define __STATIC_INLINE static inline 105 106 #elif defined ( __TASKING__ ) 107 #define __ASM __asm /*!< asm keyword for TASKING Compiler */ 108 #define __INLINE inline /*!< inline keyword for TASKING Compiler */ 109 #define __STATIC_INLINE static inline 110 111 #elif defined ( __CSMC__ ) 112 #define __packed 113 #define __ASM _asm /*!< asm keyword for COSMIC Compiler */ 114 #define __INLINE inline /*!< inline keyword for COSMIC Compiler. Use -pc99 on compile line */ 115 #define __STATIC_INLINE static inline 116 117 #else 118 #error Unknown compiler 119 #endif 120 121 /** __FPU_USED indicates whether an FPU is used or not. 122 This core does not support an FPU at all 123 */ 124 #define __FPU_USED 0U 125 126 #if defined ( __CC_ARM ) 127 #if defined __TARGET_FPU_VFP 128 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 129 #endif 130 131 #elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050) 132 #if defined __ARM_PCS_VFP 133 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 134 #endif 135 136 #elif defined ( __GNUC__ ) 137 #if defined (__VFP_FP__) && !defined(__SOFTFP__) 138 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 139 #endif 140 141 #elif defined ( __ICCARM__ ) 142 #if defined __ARMVFP__ 143 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 144 #endif 145 146 #elif defined ( __TMS470__ ) 147 #if defined __TI_VFP_SUPPORT__ 148 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 149 #endif 150 151 #elif defined ( __TASKING__ ) 152 #if defined __FPU_VFP__ 153 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 154 #endif 155 156 #elif defined ( __CSMC__ ) 157 #if ( __CSMC__ & 0x400U) 158 #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" 159 #endif 160 161 #endif 162 163 #include "core_cmInstr.h" /* Core Instruction Access */ 164 #include "core_cmFunc.h" /* Core Function Access */ 165 166 #ifdef __cplusplus 167 } 168 #endif 169 170 #endif /* __CORE_CM0PLUS_H_GENERIC */ 171 172 #ifndef __CMSIS_GENERIC 173 174 #ifndef __CORE_CM0PLUS_H_DEPENDANT 175 #define __CORE_CM0PLUS_H_DEPENDANT 176 177 #ifdef __cplusplus 178 extern "C" { 179 #endif 180 181 /* check device defines and use defaults */ 182 #if defined __CHECK_DEVICE_DEFINES 183 #ifndef __CM0PLUS_REV 184 #define __CM0PLUS_REV 0x0000U 185 #warning "__CM0PLUS_REV not defined in device header file; using default!" 186 #endif 187 188 #ifndef __MPU_PRESENT 189 #define __MPU_PRESENT 0U 190 #warning "__MPU_PRESENT not defined in device header file; using default!" 191 #endif 192 193 #ifndef __VTOR_PRESENT 194 #define __VTOR_PRESENT 0U 195 #warning "__VTOR_PRESENT not defined in device header file; using default!" 196 #endif 197 198 #ifndef __NVIC_PRIO_BITS 199 #define __NVIC_PRIO_BITS 2U 200 #warning "__NVIC_PRIO_BITS not defined in device header file; using default!" 201 #endif 202 203 #ifndef __Vendor_SysTickConfig 204 #define __Vendor_SysTickConfig 0U 205 #warning "__Vendor_SysTickConfig not defined in device header file; using default!" 206 #endif 207 #endif 208 209 /* IO definitions (access restrictions to peripheral registers) */ 210 /** 211 \defgroup CMSIS_glob_defs CMSIS Global Defines 212 213 <strong>IO Type Qualifiers</strong> are used 214 \li to specify the access to peripheral variables. 215 \li for automatic generation of peripheral register debug information. 216 */ 217 #ifdef __cplusplus 218 #define __I volatile /*!< Defines 'read only' permissions */ 219 #else 220 #define __I volatile const /*!< Defines 'read only' permissions */ 221 #endif 222 #define __O volatile /*!< Defines 'write only' permissions */ 223 #define __IO volatile /*!< Defines 'read / write' permissions */ 224 225 /* following defines should be used for structure members */ 226 #define __IM volatile const /*! Defines 'read only' structure member permissions */ 227 #define __OM volatile /*! Defines 'write only' structure member permissions */ 228 #define __IOM volatile /*! Defines 'read / write' structure member permissions */ 229 230 /*@} end of group Cortex-M0+ */ 231 232 233 234 /******************************************************************************* 235 * Register Abstraction 236 Core Register contain: 237 - Core Register 238 - Core NVIC Register 239 - Core SCB Register 240 - Core SysTick Register 241 - Core MPU Register 242 ******************************************************************************/ 243 /** 244 \defgroup CMSIS_core_register Defines and Type Definitions 245 \brief Type definitions and defines for Cortex-M processor based devices. 246 */ 247 248 /** 249 \ingroup CMSIS_core_register 250 \defgroup CMSIS_CORE Status and Control Registers 251 \brief Core Register type definitions. 252 @{ 253 */ 254 255 /** 256 \brief Union type to access the Application Program Status Register (APSR). 257 */ 258 typedef union 259 { 260 struct 261 { 262 uint32_t _reserved0:28; /*!< bit: 0..27 Reserved */ 263 uint32_t V:1; /*!< bit: 28 Overflow condition code flag */ 264 uint32_t C:1; /*!< bit: 29 Carry condition code flag */ 265 uint32_t Z:1; /*!< bit: 30 Zero condition code flag */ 266 uint32_t N:1; /*!< bit: 31 Negative condition code flag */ 267 } b; /*!< Structure used for bit access */ 268 uint32_t w; /*!< Type used for word access */ 269 } APSR_Type; 270 271 /* APSR Register Definitions */ 272 #define APSR_N_Pos 31U /*!< APSR: N Position */ 273 #define APSR_N_Msk (1UL << APSR_N_Pos) /*!< APSR: N Mask */ 274 275 #define APSR_Z_Pos 30U /*!< APSR: Z Position */ 276 #define APSR_Z_Msk (1UL << APSR_Z_Pos) /*!< APSR: Z Mask */ 277 278 #define APSR_C_Pos 29U /*!< APSR: C Position */ 279 #define APSR_C_Msk (1UL << APSR_C_Pos) /*!< APSR: C Mask */ 280 281 #define APSR_V_Pos 28U /*!< APSR: V Position */ 282 #define APSR_V_Msk (1UL << APSR_V_Pos) /*!< APSR: V Mask */ 283 284 285 /** 286 \brief Union type to access the Interrupt Program Status Register (IPSR). 287 */ 288 typedef union 289 { 290 struct 291 { 292 uint32_t ISR:9; /*!< bit: 0.. 8 Exception number */ 293 uint32_t _reserved0:23; /*!< bit: 9..31 Reserved */ 294 } b; /*!< Structure used for bit access */ 295 uint32_t w; /*!< Type used for word access */ 296 } IPSR_Type; 297 298 /* IPSR Register Definitions */ 299 #define IPSR_ISR_Pos 0U /*!< IPSR: ISR Position */ 300 #define IPSR_ISR_Msk (0x1FFUL /*<< IPSR_ISR_Pos*/) /*!< IPSR: ISR Mask */ 301 302 303 /** 304 \brief Union type to access the Special-Purpose Program Status Registers (xPSR). 305 */ 306 typedef union 307 { 308 struct 309 { 310 uint32_t ISR:9; /*!< bit: 0.. 8 Exception number */ 311 uint32_t _reserved0:15; /*!< bit: 9..23 Reserved */ 312 uint32_t T:1; /*!< bit: 24 Thumb bit (read 0) */ 313 uint32_t _reserved1:3; /*!< bit: 25..27 Reserved */ 314 uint32_t V:1; /*!< bit: 28 Overflow condition code flag */ 315 uint32_t C:1; /*!< bit: 29 Carry condition code flag */ 316 uint32_t Z:1; /*!< bit: 30 Zero condition code flag */ 317 uint32_t N:1; /*!< bit: 31 Negative condition code flag */ 318 } b; /*!< Structure used for bit access */ 319 uint32_t w; /*!< Type used for word access */ 320 } xPSR_Type; 321 322 /* xPSR Register Definitions */ 323 #define xPSR_N_Pos 31U /*!< xPSR: N Position */ 324 #define xPSR_N_Msk (1UL << xPSR_N_Pos) /*!< xPSR: N Mask */ 325 326 #define xPSR_Z_Pos 30U /*!< xPSR: Z Position */ 327 #define xPSR_Z_Msk (1UL << xPSR_Z_Pos) /*!< xPSR: Z Mask */ 328 329 #define xPSR_C_Pos 29U /*!< xPSR: C Position */ 330 #define xPSR_C_Msk (1UL << xPSR_C_Pos) /*!< xPSR: C Mask */ 331 332 #define xPSR_V_Pos 28U /*!< xPSR: V Position */ 333 #define xPSR_V_Msk (1UL << xPSR_V_Pos) /*!< xPSR: V Mask */ 334 335 #define xPSR_T_Pos 24U /*!< xPSR: T Position */ 336 #define xPSR_T_Msk (1UL << xPSR_T_Pos) /*!< xPSR: T Mask */ 337 338 #define xPSR_ISR_Pos 0U /*!< xPSR: ISR Position */ 339 #define xPSR_ISR_Msk (0x1FFUL /*<< xPSR_ISR_Pos*/) /*!< xPSR: ISR Mask */ 340 341 342 /** 343 \brief Union type to access the Control Registers (CONTROL). 344 */ 345 typedef union 346 { 347 struct 348 { 349 uint32_t nPRIV:1; /*!< bit: 0 Execution privilege in Thread mode */ 350 uint32_t SPSEL:1; /*!< bit: 1 Stack to be used */ 351 uint32_t _reserved1:30; /*!< bit: 2..31 Reserved */ 352 } b; /*!< Structure used for bit access */ 353 uint32_t w; /*!< Type used for word access */ 354 } CONTROL_Type; 355 356 /* CONTROL Register Definitions */ 357 #define CONTROL_SPSEL_Pos 1U /*!< CONTROL: SPSEL Position */ 358 #define CONTROL_SPSEL_Msk (1UL << CONTROL_SPSEL_Pos) /*!< CONTROL: SPSEL Mask */ 359 360 #define CONTROL_nPRIV_Pos 0U /*!< CONTROL: nPRIV Position */ 361 #define CONTROL_nPRIV_Msk (1UL /*<< CONTROL_nPRIV_Pos*/) /*!< CONTROL: nPRIV Mask */ 362 363 /*@} end of group CMSIS_CORE */ 364 365 366 /** 367 \ingroup CMSIS_core_register 368 \defgroup CMSIS_NVIC Nested Vectored Interrupt Controller (NVIC) 369 \brief Type definitions for the NVIC Registers 370 @{ 371 */ 372 373 /** 374 \brief Structure type to access the Nested Vectored Interrupt Controller (NVIC). 375 */ 376 typedef struct 377 { 378 __IOM uint32_t ISER[1U]; /*!< Offset: 0x000 (R/W) Interrupt Set Enable Register */ 379 uint32_t RESERVED0[31U]; 380 __IOM uint32_t ICER[1U]; /*!< Offset: 0x080 (R/W) Interrupt Clear Enable Register */ 381 uint32_t RSERVED1[31U]; 382 __IOM uint32_t ISPR[1U]; /*!< Offset: 0x100 (R/W) Interrupt Set Pending Register */ 383 uint32_t RESERVED2[31U]; 384 __IOM uint32_t ICPR[1U]; /*!< Offset: 0x180 (R/W) Interrupt Clear Pending Register */ 385 uint32_t RESERVED3[31U]; 386 uint32_t RESERVED4[64U]; 387 __IOM uint32_t IP[8U]; /*!< Offset: 0x300 (R/W) Interrupt Priority Register */ 388 } NVIC_Type; 389 390 /*@} end of group CMSIS_NVIC */ 391 392 393 /** 394 \ingroup CMSIS_core_register 395 \defgroup CMSIS_SCB System Control Block (SCB) 396 \brief Type definitions for the System Control Block Registers 397 @{ 398 */ 399 400 /** 401 \brief Structure type to access the System Control Block (SCB). 402 */ 403 typedef struct 404 { 405 __IM uint32_t CPUID; /*!< Offset: 0x000 (R/ ) CPUID Base Register */ 406 __IOM uint32_t ICSR; /*!< Offset: 0x004 (R/W) Interrupt Control and State Register */ 407 #if (__VTOR_PRESENT == 1U) 408 __IOM uint32_t VTOR; /*!< Offset: 0x008 (R/W) Vector Table Offset Register */ 409 #else 410 uint32_t RESERVED0; 411 #endif 412 __IOM uint32_t AIRCR; /*!< Offset: 0x00C (R/W) Application Interrupt and Reset Control Register */ 413 __IOM uint32_t SCR; /*!< Offset: 0x010 (R/W) System Control Register */ 414 __IOM uint32_t CCR; /*!< Offset: 0x014 (R/W) Configuration Control Register */ 415 uint32_t RESERVED1; 416 __IOM uint32_t SHP[2U]; /*!< Offset: 0x01C (R/W) System Handlers Priority Registers. [0] is RESERVED */ 417 __IOM uint32_t SHCSR; /*!< Offset: 0x024 (R/W) System Handler Control and State Register */ 418 } SCB_Type; 419 420 /* SCB CPUID Register Definitions */ 421 #define SCB_CPUID_IMPLEMENTER_Pos 24U /*!< SCB CPUID: IMPLEMENTER Position */ 422 #define SCB_CPUID_IMPLEMENTER_Msk (0xFFUL << SCB_CPUID_IMPLEMENTER_Pos) /*!< SCB CPUID: IMPLEMENTER Mask */ 423 424 #define SCB_CPUID_VARIANT_Pos 20U /*!< SCB CPUID: VARIANT Position */ 425 #define SCB_CPUID_VARIANT_Msk (0xFUL << SCB_CPUID_VARIANT_Pos) /*!< SCB CPUID: VARIANT Mask */ 426 427 #define SCB_CPUID_ARCHITECTURE_Pos 16U /*!< SCB CPUID: ARCHITECTURE Position */ 428 #define SCB_CPUID_ARCHITECTURE_Msk (0xFUL << SCB_CPUID_ARCHITECTURE_Pos) /*!< SCB CPUID: ARCHITECTURE Mask */ 429 430 #define SCB_CPUID_PARTNO_Pos 4U /*!< SCB CPUID: PARTNO Position */ 431 #define SCB_CPUID_PARTNO_Msk (0xFFFUL << SCB_CPUID_PARTNO_Pos) /*!< SCB CPUID: PARTNO Mask */ 432 433 #define SCB_CPUID_REVISION_Pos 0U /*!< SCB CPUID: REVISION Position */ 434 #define SCB_CPUID_REVISION_Msk (0xFUL /*<< SCB_CPUID_REVISION_Pos*/) /*!< SCB CPUID: REVISION Mask */ 435 436 /* SCB Interrupt Control State Register Definitions */ 437 #define SCB_ICSR_NMIPENDSET_Pos 31U /*!< SCB ICSR: NMIPENDSET Position */ 438 #define SCB_ICSR_NMIPENDSET_Msk (1UL << SCB_ICSR_NMIPENDSET_Pos) /*!< SCB ICSR: NMIPENDSET Mask */ 439 440 #define SCB_ICSR_PENDSVSET_Pos 28U /*!< SCB ICSR: PENDSVSET Position */ 441 #define SCB_ICSR_PENDSVSET_Msk (1UL << SCB_ICSR_PENDSVSET_Pos) /*!< SCB ICSR: PENDSVSET Mask */ 442 443 #define SCB_ICSR_PENDSVCLR_Pos 27U /*!< SCB ICSR: PENDSVCLR Position */ 444 #define SCB_ICSR_PENDSVCLR_Msk (1UL << SCB_ICSR_PENDSVCLR_Pos) /*!< SCB ICSR: PENDSVCLR Mask */ 445 446 #define SCB_ICSR_PENDSTSET_Pos 26U /*!< SCB ICSR: PENDSTSET Position */ 447 #define SCB_ICSR_PENDSTSET_Msk (1UL << SCB_ICSR_PENDSTSET_Pos) /*!< SCB ICSR: PENDSTSET Mask */ 448 449 #define SCB_ICSR_PENDSTCLR_Pos 25U /*!< SCB ICSR: PENDSTCLR Position */ 450 #define SCB_ICSR_PENDSTCLR_Msk (1UL << SCB_ICSR_PENDSTCLR_Pos) /*!< SCB ICSR: PENDSTCLR Mask */ 451 452 #define SCB_ICSR_ISRPREEMPT_Pos 23U /*!< SCB ICSR: ISRPREEMPT Position */ 453 #define SCB_ICSR_ISRPREEMPT_Msk (1UL << SCB_ICSR_ISRPREEMPT_Pos) /*!< SCB ICSR: ISRPREEMPT Mask */ 454 455 #define SCB_ICSR_ISRPENDING_Pos 22U /*!< SCB ICSR: ISRPENDING Position */ 456 #define SCB_ICSR_ISRPENDING_Msk (1UL << SCB_ICSR_ISRPENDING_Pos) /*!< SCB ICSR: ISRPENDING Mask */ 457 458 #define SCB_ICSR_VECTPENDING_Pos 12U /*!< SCB ICSR: VECTPENDING Position */ 459 #define SCB_ICSR_VECTPENDING_Msk (0x1FFUL << SCB_ICSR_VECTPENDING_Pos) /*!< SCB ICSR: VECTPENDING Mask */ 460 461 #define SCB_ICSR_VECTACTIVE_Pos 0U /*!< SCB ICSR: VECTACTIVE Position */ 462 #define SCB_ICSR_VECTACTIVE_Msk (0x1FFUL /*<< SCB_ICSR_VECTACTIVE_Pos*/) /*!< SCB ICSR: VECTACTIVE Mask */ 463 464 #if (__VTOR_PRESENT == 1U) 465 /* SCB Interrupt Control State Register Definitions */ 466 #define SCB_VTOR_TBLOFF_Pos 8U /*!< SCB VTOR: TBLOFF Position */ 467 #define SCB_VTOR_TBLOFF_Msk (0xFFFFFFUL << SCB_VTOR_TBLOFF_Pos) /*!< SCB VTOR: TBLOFF Mask */ 468 #endif 469 470 /* SCB Application Interrupt and Reset Control Register Definitions */ 471 #define SCB_AIRCR_VECTKEY_Pos 16U /*!< SCB AIRCR: VECTKEY Position */ 472 #define SCB_AIRCR_VECTKEY_Msk (0xFFFFUL << SCB_AIRCR_VECTKEY_Pos) /*!< SCB AIRCR: VECTKEY Mask */ 473 474 #define SCB_AIRCR_VECTKEYSTAT_Pos 16U /*!< SCB AIRCR: VECTKEYSTAT Position */ 475 #define SCB_AIRCR_VECTKEYSTAT_Msk (0xFFFFUL << SCB_AIRCR_VECTKEYSTAT_Pos) /*!< SCB AIRCR: VECTKEYSTAT Mask */ 476 477 #define SCB_AIRCR_ENDIANESS_Pos 15U /*!< SCB AIRCR: ENDIANESS Position */ 478 #define SCB_AIRCR_ENDIANESS_Msk (1UL << SCB_AIRCR_ENDIANESS_Pos) /*!< SCB AIRCR: ENDIANESS Mask */ 479 480 #define SCB_AIRCR_SYSRESETREQ_Pos 2U /*!< SCB AIRCR: SYSRESETREQ Position */ 481 #define SCB_AIRCR_SYSRESETREQ_Msk (1UL << SCB_AIRCR_SYSRESETREQ_Pos) /*!< SCB AIRCR: SYSRESETREQ Mask */ 482 483 #define SCB_AIRCR_VECTCLRACTIVE_Pos 1U /*!< SCB AIRCR: VECTCLRACTIVE Position */ 484 #define SCB_AIRCR_VECTCLRACTIVE_Msk (1UL << SCB_AIRCR_VECTCLRACTIVE_Pos) /*!< SCB AIRCR: VECTCLRACTIVE Mask */ 485 486 /* SCB System Control Register Definitions */ 487 #define SCB_SCR_SEVONPEND_Pos 4U /*!< SCB SCR: SEVONPEND Position */ 488 #define SCB_SCR_SEVONPEND_Msk (1UL << SCB_SCR_SEVONPEND_Pos) /*!< SCB SCR: SEVONPEND Mask */ 489 490 #define SCB_SCR_SLEEPDEEP_Pos 2U /*!< SCB SCR: SLEEPDEEP Position */ 491 #define SCB_SCR_SLEEPDEEP_Msk (1UL << SCB_SCR_SLEEPDEEP_Pos) /*!< SCB SCR: SLEEPDEEP Mask */ 492 493 #define SCB_SCR_SLEEPONEXIT_Pos 1U /*!< SCB SCR: SLEEPONEXIT Position */ 494 #define SCB_SCR_SLEEPONEXIT_Msk (1UL << SCB_SCR_SLEEPONEXIT_Pos) /*!< SCB SCR: SLEEPONEXIT Mask */ 495 496 /* SCB Configuration Control Register Definitions */ 497 #define SCB_CCR_STKALIGN_Pos 9U /*!< SCB CCR: STKALIGN Position */ 498 #define SCB_CCR_STKALIGN_Msk (1UL << SCB_CCR_STKALIGN_Pos) /*!< SCB CCR: STKALIGN Mask */ 499 500 #define SCB_CCR_UNALIGN_TRP_Pos 3U /*!< SCB CCR: UNALIGN_TRP Position */ 501 #define SCB_CCR_UNALIGN_TRP_Msk (1UL << SCB_CCR_UNALIGN_TRP_Pos) /*!< SCB CCR: UNALIGN_TRP Mask */ 502 503 /* SCB System Handler Control and State Register Definitions */ 504 #define SCB_SHCSR_SVCALLPENDED_Pos 15U /*!< SCB SHCSR: SVCALLPENDED Position */ 505 #define SCB_SHCSR_SVCALLPENDED_Msk (1UL << SCB_SHCSR_SVCALLPENDED_Pos) /*!< SCB SHCSR: SVCALLPENDED Mask */ 506 507 /*@} end of group CMSIS_SCB */ 508 509 510 /** 511 \ingroup CMSIS_core_register 512 \defgroup CMSIS_SysTick System Tick Timer (SysTick) 513 \brief Type definitions for the System Timer Registers. 514 @{ 515 */ 516 517 /** 518 \brief Structure type to access the System Timer (SysTick). 519 */ 520 typedef struct 521 { 522 __IOM uint32_t CTRL; /*!< Offset: 0x000 (R/W) SysTick Control and Status Register */ 523 __IOM uint32_t LOAD; /*!< Offset: 0x004 (R/W) SysTick Reload Value Register */ 524 __IOM uint32_t VAL; /*!< Offset: 0x008 (R/W) SysTick Current Value Register */ 525 __IM uint32_t CALIB; /*!< Offset: 0x00C (R/ ) SysTick Calibration Register */ 526 } SysTick_Type; 527 528 /* SysTick Control / Status Register Definitions */ 529 #define SysTick_CTRL_COUNTFLAG_Pos 16U /*!< SysTick CTRL: COUNTFLAG Position */ 530 #define SysTick_CTRL_COUNTFLAG_Msk (1UL << SysTick_CTRL_COUNTFLAG_Pos) /*!< SysTick CTRL: COUNTFLAG Mask */ 531 532 #define SysTick_CTRL_CLKSOURCE_Pos 2U /*!< SysTick CTRL: CLKSOURCE Position */ 533 #define SysTick_CTRL_CLKSOURCE_Msk (1UL << SysTick_CTRL_CLKSOURCE_Pos) /*!< SysTick CTRL: CLKSOURCE Mask */ 534 535 #define SysTick_CTRL_TICKINT_Pos 1U /*!< SysTick CTRL: TICKINT Position */ 536 #define SysTick_CTRL_TICKINT_Msk (1UL << SysTick_CTRL_TICKINT_Pos) /*!< SysTick CTRL: TICKINT Mask */ 537 538 #define SysTick_CTRL_ENABLE_Pos 0U /*!< SysTick CTRL: ENABLE Position */ 539 #define SysTick_CTRL_ENABLE_Msk (1UL /*<< SysTick_CTRL_ENABLE_Pos*/) /*!< SysTick CTRL: ENABLE Mask */ 540 541 /* SysTick Reload Register Definitions */ 542 #define SysTick_LOAD_RELOAD_Pos 0U /*!< SysTick LOAD: RELOAD Position */ 543 #define SysTick_LOAD_RELOAD_Msk (0xFFFFFFUL /*<< SysTick_LOAD_RELOAD_Pos*/) /*!< SysTick LOAD: RELOAD Mask */ 544 545 /* SysTick Current Register Definitions */ 546 #define SysTick_VAL_CURRENT_Pos 0U /*!< SysTick VAL: CURRENT Position */ 547 #define SysTick_VAL_CURRENT_Msk (0xFFFFFFUL /*<< SysTick_VAL_CURRENT_Pos*/) /*!< SysTick VAL: CURRENT Mask */ 548 549 /* SysTick Calibration Register Definitions */ 550 #define SysTick_CALIB_NOREF_Pos 31U /*!< SysTick CALIB: NOREF Position */ 551 #define SysTick_CALIB_NOREF_Msk (1UL << SysTick_CALIB_NOREF_Pos) /*!< SysTick CALIB: NOREF Mask */ 552 553 #define SysTick_CALIB_SKEW_Pos 30U /*!< SysTick CALIB: SKEW Position */ 554 #define SysTick_CALIB_SKEW_Msk (1UL << SysTick_CALIB_SKEW_Pos) /*!< SysTick CALIB: SKEW Mask */ 555 556 #define SysTick_CALIB_TENMS_Pos 0U /*!< SysTick CALIB: TENMS Position */ 557 #define SysTick_CALIB_TENMS_Msk (0xFFFFFFUL /*<< SysTick_CALIB_TENMS_Pos*/) /*!< SysTick CALIB: TENMS Mask */ 558 559 /*@} end of group CMSIS_SysTick */ 560 561 #if (__MPU_PRESENT == 1U) 562 /** 563 \ingroup CMSIS_core_register 564 \defgroup CMSIS_MPU Memory Protection Unit (MPU) 565 \brief Type definitions for the Memory Protection Unit (MPU) 566 @{ 567 */ 568 569 /** 570 \brief Structure type to access the Memory Protection Unit (MPU). 571 */ 572 typedef struct 573 { 574 __IM uint32_t TYPE; /*!< Offset: 0x000 (R/ ) MPU Type Register */ 575 __IOM uint32_t CTRL; /*!< Offset: 0x004 (R/W) MPU Control Register */ 576 __IOM uint32_t RNR; /*!< Offset: 0x008 (R/W) MPU Region RNRber Register */ 577 __IOM uint32_t RBAR; /*!< Offset: 0x00C (R/W) MPU Region Base Address Register */ 578 __IOM uint32_t RASR; /*!< Offset: 0x010 (R/W) MPU Region Attribute and Size Register */ 579 } MPU_Type; 580 581 /* MPU Type Register Definitions */ 582 #define MPU_TYPE_IREGION_Pos 16U /*!< MPU TYPE: IREGION Position */ 583 #define MPU_TYPE_IREGION_Msk (0xFFUL << MPU_TYPE_IREGION_Pos) /*!< MPU TYPE: IREGION Mask */ 584 585 #define MPU_TYPE_DREGION_Pos 8U /*!< MPU TYPE: DREGION Position */ 586 #define MPU_TYPE_DREGION_Msk (0xFFUL << MPU_TYPE_DREGION_Pos) /*!< MPU TYPE: DREGION Mask */ 587 588 #define MPU_TYPE_SEPARATE_Pos 0U /*!< MPU TYPE: SEPARATE Position */ 589 #define MPU_TYPE_SEPARATE_Msk (1UL /*<< MPU_TYPE_SEPARATE_Pos*/) /*!< MPU TYPE: SEPARATE Mask */ 590 591 /* MPU Control Register Definitions */ 592 #define MPU_CTRL_PRIVDEFENA_Pos 2U /*!< MPU CTRL: PRIVDEFENA Position */ 593 #define MPU_CTRL_PRIVDEFENA_Msk (1UL << MPU_CTRL_PRIVDEFENA_Pos) /*!< MPU CTRL: PRIVDEFENA Mask */ 594 595 #define MPU_CTRL_HFNMIENA_Pos 1U /*!< MPU CTRL: HFNMIENA Position */ 596 #define MPU_CTRL_HFNMIENA_Msk (1UL << MPU_CTRL_HFNMIENA_Pos) /*!< MPU CTRL: HFNMIENA Mask */ 597 598 #define MPU_CTRL_ENABLE_Pos 0U /*!< MPU CTRL: ENABLE Position */ 599 #define MPU_CTRL_ENABLE_Msk (1UL /*<< MPU_CTRL_ENABLE_Pos*/) /*!< MPU CTRL: ENABLE Mask */ 600 601 /* MPU Region Number Register Definitions */ 602 #define MPU_RNR_REGION_Pos 0U /*!< MPU RNR: REGION Position */ 603 #define MPU_RNR_REGION_Msk (0xFFUL /*<< MPU_RNR_REGION_Pos*/) /*!< MPU RNR: REGION Mask */ 604 605 /* MPU Region Base Address Register Definitions */ 606 #define MPU_RBAR_ADDR_Pos 8U /*!< MPU RBAR: ADDR Position */ 607 #define MPU_RBAR_ADDR_Msk (0xFFFFFFUL << MPU_RBAR_ADDR_Pos) /*!< MPU RBAR: ADDR Mask */ 608 609 #define MPU_RBAR_VALID_Pos 4U /*!< MPU RBAR: VALID Position */ 610 #define MPU_RBAR_VALID_Msk (1UL << MPU_RBAR_VALID_Pos) /*!< MPU RBAR: VALID Mask */ 611 612 #define MPU_RBAR_REGION_Pos 0U /*!< MPU RBAR: REGION Position */ 613 #define MPU_RBAR_REGION_Msk (0xFUL /*<< MPU_RBAR_REGION_Pos*/) /*!< MPU RBAR: REGION Mask */ 614 615 /* MPU Region Attribute and Size Register Definitions */ 616 #define MPU_RASR_ATTRS_Pos 16U /*!< MPU RASR: MPU Region Attribute field Position */ 617 #define MPU_RASR_ATTRS_Msk (0xFFFFUL << MPU_RASR_ATTRS_Pos) /*!< MPU RASR: MPU Region Attribute field Mask */ 618 619 #define MPU_RASR_XN_Pos 28U /*!< MPU RASR: ATTRS.XN Position */ 620 #define MPU_RASR_XN_Msk (1UL << MPU_RASR_XN_Pos) /*!< MPU RASR: ATTRS.XN Mask */ 621 622 #define MPU_RASR_AP_Pos 24U /*!< MPU RASR: ATTRS.AP Position */ 623 #define MPU_RASR_AP_Msk (0x7UL << MPU_RASR_AP_Pos) /*!< MPU RASR: ATTRS.AP Mask */ 624 625 #define MPU_RASR_TEX_Pos 19U /*!< MPU RASR: ATTRS.TEX Position */ 626 #define MPU_RASR_TEX_Msk (0x7UL << MPU_RASR_TEX_Pos) /*!< MPU RASR: ATTRS.TEX Mask */ 627 628 #define MPU_RASR_S_Pos 18U /*!< MPU RASR: ATTRS.S Position */ 629 #define MPU_RASR_S_Msk (1UL << MPU_RASR_S_Pos) /*!< MPU RASR: ATTRS.S Mask */ 630 631 #define MPU_RASR_C_Pos 17U /*!< MPU RASR: ATTRS.C Position */ 632 #define MPU_RASR_C_Msk (1UL << MPU_RASR_C_Pos) /*!< MPU RASR: ATTRS.C Mask */ 633 634 #define MPU_RASR_B_Pos 16U /*!< MPU RASR: ATTRS.B Position */ 635 #define MPU_RASR_B_Msk (1UL << MPU_RASR_B_Pos) /*!< MPU RASR: ATTRS.B Mask */ 636 637 #define MPU_RASR_SRD_Pos 8U /*!< MPU RASR: Sub-Region Disable Position */ 638 #define MPU_RASR_SRD_Msk (0xFFUL << MPU_RASR_SRD_Pos) /*!< MPU RASR: Sub-Region Disable Mask */ 639 640 #define MPU_RASR_SIZE_Pos 1U /*!< MPU RASR: Region Size Field Position */ 641 #define MPU_RASR_SIZE_Msk (0x1FUL << MPU_RASR_SIZE_Pos) /*!< MPU RASR: Region Size Field Mask */ 642 643 #define MPU_RASR_ENABLE_Pos 0U /*!< MPU RASR: Region enable bit Position */ 644 #define MPU_RASR_ENABLE_Msk (1UL /*<< MPU_RASR_ENABLE_Pos*/) /*!< MPU RASR: Region enable bit Disable Mask */ 645 646 /*@} end of group CMSIS_MPU */ 647 #endif 648 649 650 /** 651 \ingroup CMSIS_core_register 652 \defgroup CMSIS_CoreDebug Core Debug Registers (CoreDebug) 653 \brief Cortex-M0+ Core Debug Registers (DCB registers, SHCSR, and DFSR) are only accessible over DAP and not via processor. 654 Therefore they are not covered by the Cortex-M0+ header file. 655 @{ 656 */ 657 /*@} end of group CMSIS_CoreDebug */ 658 659 660 /** 661 \ingroup CMSIS_core_register 662 \defgroup CMSIS_core_bitfield Core register bit field macros 663 \brief Macros for use with bit field definitions (xxx_Pos, xxx_Msk). 664 @{ 665 */ 666 667 /** 668 \brief Mask and shift a bit field value for use in a register bit range. 669 \param[in] field Name of the register bit field. 670 \param[in] value Value of the bit field. 671 \return Masked and shifted value. 672 */ 673 #define _VAL2FLD(field, value) ((value << field ## _Pos) & field ## _Msk) 674 675 /** 676 \brief Mask and shift a register value to extract a bit filed value. 677 \param[in] field Name of the register bit field. 678 \param[in] value Value of register. 679 \return Masked and shifted bit field value. 680 */ 681 #define _FLD2VAL(field, value) ((value & field ## _Msk) >> field ## _Pos) 682 683 /*@} end of group CMSIS_core_bitfield */ 684 685 686 /** 687 \ingroup CMSIS_core_register 688 \defgroup CMSIS_core_base Core Definitions 689 \brief Definitions for base addresses, unions, and structures. 690 @{ 691 */ 692 693 /* Memory mapping of Cortex-M0+ Hardware */ 694 #define SCS_BASE (0xE000E000UL) /*!< System Control Space Base Address */ 695 #define SysTick_BASE (SCS_BASE + 0x0010UL) /*!< SysTick Base Address */ 696 #define NVIC_BASE (SCS_BASE + 0x0100UL) /*!< NVIC Base Address */ 697 #define SCB_BASE (SCS_BASE + 0x0D00UL) /*!< System Control Block Base Address */ 698 699 #define SCB ((SCB_Type *) SCB_BASE ) /*!< SCB configuration struct */ 700 #define SysTick ((SysTick_Type *) SysTick_BASE ) /*!< SysTick configuration struct */ 701 #define NVIC ((NVIC_Type *) NVIC_BASE ) /*!< NVIC configuration struct */ 702 703 #if (__MPU_PRESENT == 1U) 704 #define MPU_BASE (SCS_BASE + 0x0D90UL) /*!< Memory Protection Unit */ 705 #define MPU ((MPU_Type *) MPU_BASE ) /*!< Memory Protection Unit */ 706 #endif 707 708 /*@} */ 709 710 711 712 /******************************************************************************* 713 * Hardware Abstraction Layer 714 Core Function Interface contains: 715 - Core NVIC Functions 716 - Core SysTick Functions 717 - Core Register Access Functions 718 ******************************************************************************/ 719 /** 720 \defgroup CMSIS_Core_FunctionInterface Functions and Instructions Reference 721 */ 722 723 724 725 /* ########################## NVIC functions #################################### */ 726 /** 727 \ingroup CMSIS_Core_FunctionInterface 728 \defgroup CMSIS_Core_NVICFunctions NVIC Functions 729 \brief Functions that manage interrupts and exceptions via the NVIC. 730 @{ 731 */ 732 733 /* Interrupt Priorities are WORD accessible only under ARMv6M */ 734 /* The following MACROS handle generation of the register offset and byte masks */ 735 #define _BIT_SHIFT(IRQn) ( ((((uint32_t)(int32_t)(IRQn)) ) & 0x03UL) * 8UL) 736 #define _SHP_IDX(IRQn) ( (((((uint32_t)(int32_t)(IRQn)) & 0x0FUL)-8UL) >> 2UL) ) 737 #define _IP_IDX(IRQn) ( (((uint32_t)(int32_t)(IRQn)) >> 2UL) ) 738 739 740 /** 741 \brief Enable External Interrupt 742 \details Enables a device-specific interrupt in the NVIC interrupt controller. 743 \param [in] IRQn External interrupt number. Value cannot be negative. 744 */ 745 __STATIC_INLINE void NVIC_EnableIRQ(IRQn_Type IRQn) 746 { 747 NVIC->ISER[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL)); 748 } 749 750 751 /** 752 \brief Disable External Interrupt 753 \details Disables a device-specific interrupt in the NVIC interrupt controller. 754 \param [in] IRQn External interrupt number. Value cannot be negative. 755 */ 756 __STATIC_INLINE void NVIC_DisableIRQ(IRQn_Type IRQn) 757 { 758 NVIC->ICER[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL)); 759 } 760 761 762 /** 763 \brief Get Pending Interrupt 764 \details Reads the pending register in the NVIC and returns the pending bit for the specified interrupt. 765 \param [in] IRQn Interrupt number. 766 \return 0 Interrupt status is not pending. 767 \return 1 Interrupt status is pending. 768 */ 769 __STATIC_INLINE uint32_t NVIC_GetPendingIRQ(IRQn_Type IRQn) 770 { 771 return((uint32_t)(((NVIC->ISPR[0U] & (1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL))) != 0UL) ? 1UL : 0UL)); 772 } 773 774 775 /** 776 \brief Set Pending Interrupt 777 \details Sets the pending bit of an external interrupt. 778 \param [in] IRQn Interrupt number. Value cannot be negative. 779 */ 780 __STATIC_INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn) 781 { 782 NVIC->ISPR[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL)); 783 } 784 785 786 /** 787 \brief Clear Pending Interrupt 788 \details Clears the pending bit of an external interrupt. 789 \param [in] IRQn External interrupt number. Value cannot be negative. 790 */ 791 __STATIC_INLINE void NVIC_ClearPendingIRQ(IRQn_Type IRQn) 792 { 793 NVIC->ICPR[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL)); 794 } 795 796 797 /** 798 \brief Set Interrupt Priority 799 \details Sets the priority of an interrupt. 800 \note The priority cannot be set for every core interrupt. 801 \param [in] IRQn Interrupt number. 802 \param [in] priority Priority to set. 803 */ 804 __STATIC_INLINE void NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority) 805 { 806 if ((int32_t)(IRQn) < 0) 807 { 808 SCB->SHP[_SHP_IDX(IRQn)] = ((uint32_t)(SCB->SHP[_SHP_IDX(IRQn)] & ~(0xFFUL << _BIT_SHIFT(IRQn))) | 809 (((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL) << _BIT_SHIFT(IRQn))); 810 } 811 else 812 { 813 NVIC->IP[_IP_IDX(IRQn)] = ((uint32_t)(NVIC->IP[_IP_IDX(IRQn)] & ~(0xFFUL << _BIT_SHIFT(IRQn))) | 814 (((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL) << _BIT_SHIFT(IRQn))); 815 } 816 } 817 818 819 /** 820 \brief Get Interrupt Priority 821 \details Reads the priority of an interrupt. 822 The interrupt number can be positive to specify an external (device specific) interrupt, 823 or negative to specify an internal (core) interrupt. 824 \param [in] IRQn Interrupt number. 825 \return Interrupt Priority. 826 Value is aligned automatically to the implemented priority bits of the microcontroller. 827 */ 828 __STATIC_INLINE uint32_t NVIC_GetPriority(IRQn_Type IRQn) 829 { 830 831 if ((int32_t)(IRQn) < 0) 832 { 833 return((uint32_t)(((SCB->SHP[_SHP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) & (uint32_t)0xFFUL) >> (8U - __NVIC_PRIO_BITS))); 834 } 835 else 836 { 837 return((uint32_t)(((NVIC->IP[ _IP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) & (uint32_t)0xFFUL) >> (8U - __NVIC_PRIO_BITS))); 838 } 839 } 840 841 842 /** 843 \brief System Reset 844 \details Initiates a system reset request to reset the MCU. 845 */ 846 __STATIC_INLINE void NVIC_SystemReset(void) 847 { 848 __DSB(); /* Ensure all outstanding memory accesses included 849 buffered write are completed before reset */ 850 SCB->AIRCR = ((0x5FAUL << SCB_AIRCR_VECTKEY_Pos) | 851 SCB_AIRCR_SYSRESETREQ_Msk); 852 __DSB(); /* Ensure completion of memory access */ 853 854 for (;;) /* wait until reset */ 855 { 856 __NOP(); 857 } 858 } 859 860 /*@} end of CMSIS_Core_NVICFunctions */ 861 862 863 864 /* ################################## SysTick function ############################################ */ 865 /** 866 \ingroup CMSIS_Core_FunctionInterface 867 \defgroup CMSIS_Core_SysTickFunctions SysTick Functions 868 \brief Functions that configure the System. 869 @{ 870 */ 871 872 #if (__Vendor_SysTickConfig == 0U) 873 874 /** 875 \brief System Tick Configuration 876 \details Initializes the System Timer and its interrupt, and starts the System Tick Timer. 877 Counter is in free running mode to generate periodic interrupts. 878 \param [in] ticks Number of ticks between two interrupts. 879 \return 0 Function succeeded. 880 \return 1 Function failed. 881 \note When the variable <b>__Vendor_SysTickConfig</b> is set to 1, then the 882 function <b>SysTick_Config</b> is not included. In this case, the file <b><i>device</i>.h</b> 883 must contain a vendor-specific implementation of this function. 884 */ 885 __STATIC_INLINE uint32_t SysTick_Config(uint32_t ticks) 886 { 887 if ((ticks - 1UL) > SysTick_LOAD_RELOAD_Msk) 888 { 889 return (1UL); /* Reload value impossible */ 890 } 891 892 SysTick->LOAD = (uint32_t)(ticks - 1UL); /* set reload register */ 893 NVIC_SetPriority (SysTick_IRQn, (1UL << __NVIC_PRIO_BITS) - 1UL); /* set Priority for Systick Interrupt */ 894 SysTick->VAL = 0UL; /* Load the SysTick Counter Value */ 895 SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | 896 SysTick_CTRL_TICKINT_Msk | 897 SysTick_CTRL_ENABLE_Msk; /* Enable SysTick IRQ and SysTick Timer */ 898 return (0UL); /* Function successful */ 899 } 900 901 #endif 902 903 /*@} end of CMSIS_Core_SysTickFunctions */ 904 905 906 907 908 #ifdef __cplusplus 909 } 910 #endif 911 912 #endif /* __CORE_CM0PLUS_H_DEPENDANT */ 913 914 #endif /* __CMSIS_GENERIC */ 915