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March 2019 ******************************************************************************/ /* * Copyright (c) 2009-2018 Arm Limited. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the License); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an AS IS BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #if defined ( __ICCARM__ ) #pragma system_include /* treat file as system include file for MISRA check */ #elif defined (__clang__) #pragma clang system_header /* treat file as system include file */ #endif #ifndef __CORE_CM0PLUS_H_GENERIC #define __CORE_CM0PLUS_H_GENERIC #include <stdint.h> #ifdef __cplusplus extern "C" { #endif /** \page CMSIS_MISRA_Exceptions MISRA-C:2004 Compliance Exceptions CMSIS violates the following MISRA-C:2004 rules: \li Required Rule 8.5, object/function definition in header file.<br> Function definitions in header files are used to allow 'inlining'. \li Required Rule 18.4, declaration of union type or object of union type: '{...}'.<br> Unions are used for effective representation of core registers. \li Advisory Rule 19.7, Function-like macro defined.<br> Function-like macros are used to allow more efficient code. */ /******************************************************************************* * CMSIS definitions ******************************************************************************/ /** \ingroup Cortex-M0+ @{ */ #include "cmsis_version.h" /* CMSIS CM0+ definitions */ #define __CM0PLUS_CMSIS_VERSION_MAIN (__CM_CMSIS_VERSION_MAIN) /*!< \deprecated [31:16] CMSIS HAL main version */ #define __CM0PLUS_CMSIS_VERSION_SUB (__CM_CMSIS_VERSION_SUB) /*!< \deprecated [15:0] CMSIS HAL sub version */ #define __CM0PLUS_CMSIS_VERSION ((__CM0PLUS_CMSIS_VERSION_MAIN << 16U) | \ __CM0PLUS_CMSIS_VERSION_SUB ) /*!< \deprecated CMSIS HAL version number */ #define __CORTEX_M (0U) /*!< Cortex-M Core */ /** __FPU_USED indicates whether an FPU is used or not. This core does not support an FPU at all */ #define __FPU_USED 0U #if defined ( __CC_ARM ) #if defined __TARGET_FPU_VFP #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #elif defined (__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050) #if defined __ARM_FP #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #elif defined ( __GNUC__ ) #if defined (__VFP_FP__) && !defined(__SOFTFP__) #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #elif defined ( __ICCARM__ ) #if defined __ARMVFP__ #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #elif defined ( __TI_ARM__ ) #if defined __TI_VFP_SUPPORT__ #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #elif defined ( __TASKING__ ) #if defined __FPU_VFP__ #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #elif defined ( __CSMC__ ) #if ( __CSMC__ & 0x400U) #error "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)" #endif #endif #include "cmsis_compiler.h" /* CMSIS compiler specific defines */ #ifdef __cplusplus } #endif #endif /* __CORE_CM0PLUS_H_GENERIC */ #ifndef __CMSIS_GENERIC #ifndef __CORE_CM0PLUS_H_DEPENDANT #define __CORE_CM0PLUS_H_DEPENDANT #ifdef __cplusplus extern "C" { #endif /* check device defines and use defaults */ #if defined __CHECK_DEVICE_DEFINES #ifndef __CM0PLUS_REV #define __CM0PLUS_REV 0x0000U #warning "__CM0PLUS_REV not defined in device header file; using default!" #endif #ifndef __MPU_PRESENT #define __MPU_PRESENT 0U #warning "__MPU_PRESENT not defined in device header file; using default!" #endif #ifndef __VTOR_PRESENT #define __VTOR_PRESENT 0U #warning "__VTOR_PRESENT not defined in device header file; using default!" #endif #ifndef __NVIC_PRIO_BITS #define __NVIC_PRIO_BITS 2U #warning "__NVIC_PRIO_BITS not defined in device header file; using default!" #endif #ifndef __Vendor_SysTickConfig #define __Vendor_SysTickConfig 0U #warning "__Vendor_SysTickConfig not defined in device header file; using default!" #endif #endif /* IO definitions (access restrictions to peripheral registers) */ /** \defgroup CMSIS_glob_defs CMSIS Global Defines <strong>IO Type Qualifiers</strong> are used \li to specify the access to peripheral variables. \li for automatic generation of peripheral register debug information. */ #ifdef __cplusplus #define __I volatile /*!< Defines 'read only' permissions */ #else #define __I volatile const /*!< Defines 'read only' permissions */ #endif #define __O volatile /*!< Defines 'write only' permissions */ #define __IO volatile /*!< Defines 'read / write' permissions */ /* following defines should be used for structure members */ #define __IM volatile const /*! Defines 'read only' structure member permissions */ #define __OM volatile /*! Defines 'write only' structure member permissions */ #define __IOM volatile /*! Defines 'read / write' structure member permissions */ /*@} end of group Cortex-M0+ */ /******************************************************************************* * Register Abstraction Core Register contain: - Core Register - Core NVIC Register - Core SCB Register - Core SysTick Register - Core MPU Register ******************************************************************************/ /** \defgroup CMSIS_core_register Defines and Type Definitions \brief Type definitions and defines for Cortex-M processor based devices. */ /** \ingroup CMSIS_core_register \defgroup CMSIS_CORE Status and Control Registers \brief Core Register type definitions. @{ */ /** \brief Union type to access the Application Program Status Register (APSR). */ typedef union { struct { uint32_t _reserved0:28; /*!< bit: 0..27 Reserved */ uint32_t V:1; /*!< bit: 28 Overflow condition code flag */ uint32_t C:1; /*!< bit: 29 Carry condition code flag */ uint32_t Z:1; /*!< bit: 30 Zero condition code flag */ uint32_t N:1; /*!< bit: 31 Negative condition code flag */ } b; /*!< Structure used for bit access */ uint32_t w; /*!< Type used for word access */ } APSR_Type; /* APSR Register Definitions */ #define APSR_N_Pos 31U /*!< APSR: N Position */ #define APSR_N_Msk (1UL << APSR_N_Pos) /*!< APSR: N Mask */ #define APSR_Z_Pos 30U /*!< APSR: Z Position */ #define APSR_Z_Msk (1UL << APSR_Z_Pos) /*!< APSR: Z Mask */ #define APSR_C_Pos 29U /*!< APSR: C Position */ #define APSR_C_Msk (1UL << APSR_C_Pos) /*!< APSR: C Mask */ #define APSR_V_Pos 28U /*!< APSR: V Position */ #define APSR_V_Msk (1UL << APSR_V_Pos) /*!< APSR: V Mask */ /** \brief Union type to access the Interrupt Program Status Register (IPSR). */ typedef union { struct { uint32_t ISR:9; /*!< bit: 0.. 8 Exception number */ uint32_t _reserved0:23; /*!< bit: 9..31 Reserved */ } b; /*!< Structure used for bit access */ uint32_t w; /*!< Type used for word access */ } IPSR_Type; /* IPSR Register Definitions */ #define IPSR_ISR_Pos 0U /*!< IPSR: ISR Position */ #define IPSR_ISR_Msk (0x1FFUL /*<< IPSR_ISR_Pos*/) /*!< IPSR: ISR Mask */ /** \brief Union type to access the Special-Purpose Program Status Registers (xPSR). */ typedef union { struct { uint32_t ISR:9; /*!< bit: 0.. 8 Exception number */ uint32_t _reserved0:15; /*!< bit: 9..23 Reserved */ uint32_t T:1; /*!< bit: 24 Thumb bit (read 0) */ uint32_t _reserved1:3; /*!< bit: 25..27 Reserved */ uint32_t V:1; /*!< bit: 28 Overflow condition code flag */ uint32_t C:1; /*!< bit: 29 Carry condition code flag */ uint32_t Z:1; /*!< bit: 30 Zero condition code flag */ uint32_t N:1; /*!< bit: 31 Negative condition code flag */ } b; /*!< Structure used for bit access */ uint32_t w; /*!< Type used for word access */ } xPSR_Type; /* xPSR Register Definitions */ #define xPSR_N_Pos 31U /*!< xPSR: N Position */ #define xPSR_N_Msk (1UL << xPSR_N_Pos) /*!< xPSR: N Mask */ #define xPSR_Z_Pos 30U /*!< xPSR: Z Position */ #define xPSR_Z_Msk (1UL << xPSR_Z_Pos) /*!< xPSR: Z Mask */ #define xPSR_C_Pos 29U /*!< xPSR: C Position */ #define xPSR_C_Msk (1UL << xPSR_C_Pos) /*!< xPSR: C Mask */ #define xPSR_V_Pos 28U /*!< xPSR: V Position */ #define xPSR_V_Msk (1UL << xPSR_V_Pos) /*!< xPSR: V Mask */ #define xPSR_T_Pos 24U /*!< xPSR: T Position */ #define xPSR_T_Msk (1UL << xPSR_T_Pos) /*!< xPSR: T Mask */ #define xPSR_ISR_Pos 0U /*!< xPSR: ISR Position */ #define xPSR_ISR_Msk (0x1FFUL /*<< xPSR_ISR_Pos*/) /*!< xPSR: ISR Mask */ /** \brief Union type to access the Control Registers (CONTROL). */ typedef union { struct { uint32_t nPRIV:1; /*!< bit: 0 Execution privilege in Thread mode */ uint32_t SPSEL:1; /*!< bit: 1 Stack to be used */ uint32_t _reserved1:30; /*!< bit: 2..31 Reserved */ } b; /*!< Structure used for bit access */ uint32_t w; /*!< Type used for word access */ } CONTROL_Type; /* CONTROL Register Definitions */ #define CONTROL_SPSEL_Pos 1U /*!< CONTROL: SPSEL Position */ #define CONTROL_SPSEL_Msk (1UL << CONTROL_SPSEL_Pos) /*!< CONTROL: SPSEL Mask */ #define CONTROL_nPRIV_Pos 0U /*!< CONTROL: nPRIV Position */ #define CONTROL_nPRIV_Msk (1UL /*<< CONTROL_nPRIV_Pos*/) /*!< CONTROL: nPRIV Mask */ /*@} end of group CMSIS_CORE */ /** \ingroup CMSIS_core_register \defgroup CMSIS_NVIC Nested Vectored Interrupt Controller (NVIC) \brief Type definitions for the NVIC Registers @{ */ /** \brief Structure type to access the Nested Vectored Interrupt Controller (NVIC). */ typedef struct { __IOM uint32_t ISER[1U]; /*!< Offset: 0x000 (R/W) Interrupt Set Enable Register */ uint32_t RESERVED0[31U]; __IOM uint32_t ICER[1U]; /*!< Offset: 0x080 (R/W) Interrupt Clear Enable Register */ uint32_t RESERVED1[31U]; __IOM uint32_t ISPR[1U]; /*!< Offset: 0x100 (R/W) Interrupt Set Pending Register */ uint32_t RESERVED2[31U]; __IOM uint32_t ICPR[1U]; /*!< Offset: 0x180 (R/W) Interrupt Clear Pending Register */ uint32_t RESERVED3[31U]; uint32_t RESERVED4[64U]; __IOM uint32_t IP[8U]; /*!< Offset: 0x300 (R/W) Interrupt Priority Register */ } NVIC_Type; /*@} end of group CMSIS_NVIC */ /** \ingroup CMSIS_core_register \defgroup CMSIS_SCB System Control Block (SCB) \brief Type definitions for the System Control Block Registers @{ */ /** \brief Structure type to access the System Control Block (SCB). */ typedef struct { __IM uint32_t CPUID; /*!< Offset: 0x000 (R/ ) CPUID Base Register */ __IOM uint32_t ICSR; /*!< Offset: 0x004 (R/W) Interrupt Control and State Register */ #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U) __IOM uint32_t VTOR; /*!< Offset: 0x008 (R/W) Vector Table Offset Register */ #else uint32_t RESERVED0; #endif __IOM uint32_t AIRCR; /*!< Offset: 0x00C (R/W) Application Interrupt and Reset Control Register */ __IOM uint32_t SCR; /*!< Offset: 0x010 (R/W) System Control Register */ __IOM uint32_t CCR; /*!< Offset: 0x014 (R/W) Configuration Control Register */ uint32_t RESERVED1; __IOM uint32_t SHP[2U]; /*!< Offset: 0x01C (R/W) System Handlers Priority Registers. [0] is RESERVED */ __IOM uint32_t SHCSR; /*!< Offset: 0x024 (R/W) System Handler Control and State Register */ } SCB_Type; /* SCB CPUID Register Definitions */ #define SCB_CPUID_IMPLEMENTER_Pos 24U /*!< SCB CPUID: IMPLEMENTER Position */ #define SCB_CPUID_IMPLEMENTER_Msk (0xFFUL << SCB_CPUID_IMPLEMENTER_Pos) /*!< SCB CPUID: IMPLEMENTER Mask */ #define SCB_CPUID_VARIANT_Pos 20U /*!< SCB CPUID: VARIANT Position */ #define SCB_CPUID_VARIANT_Msk (0xFUL << SCB_CPUID_VARIANT_Pos) /*!< SCB CPUID: VARIANT Mask */ #define SCB_CPUID_ARCHITECTURE_Pos 16U /*!< SCB CPUID: ARCHITECTURE Position */ #define SCB_CPUID_ARCHITECTURE_Msk (0xFUL << SCB_CPUID_ARCHITECTURE_Pos) /*!< SCB CPUID: ARCHITECTURE Mask */ #define SCB_CPUID_PARTNO_Pos 4U /*!< SCB CPUID: PARTNO Position */ #define SCB_CPUID_PARTNO_Msk (0xFFFUL << SCB_CPUID_PARTNO_Pos) /*!< SCB CPUID: PARTNO Mask */ #define SCB_CPUID_REVISION_Pos 0U /*!< SCB CPUID: REVISION Position */ #define SCB_CPUID_REVISION_Msk (0xFUL /*<< SCB_CPUID_REVISION_Pos*/) /*!< SCB CPUID: REVISION Mask */ /* SCB Interrupt Control State Register Definitions */ #define SCB_ICSR_NMIPENDSET_Pos 31U /*!< SCB ICSR: NMIPENDSET Position */ #define SCB_ICSR_NMIPENDSET_Msk (1UL << SCB_ICSR_NMIPENDSET_Pos) /*!< SCB ICSR: NMIPENDSET Mask */ #define SCB_ICSR_PENDSVSET_Pos 28U /*!< SCB ICSR: PENDSVSET Position */ #define SCB_ICSR_PENDSVSET_Msk (1UL << SCB_ICSR_PENDSVSET_Pos) /*!< SCB ICSR: PENDSVSET Mask */ #define SCB_ICSR_PENDSVCLR_Pos 27U /*!< SCB ICSR: PENDSVCLR Position */ #define SCB_ICSR_PENDSVCLR_Msk (1UL << SCB_ICSR_PENDSVCLR_Pos) /*!< SCB ICSR: PENDSVCLR Mask */ #define SCB_ICSR_PENDSTSET_Pos 26U /*!< SCB ICSR: PENDSTSET Position */ #define SCB_ICSR_PENDSTSET_Msk (1UL << SCB_ICSR_PENDSTSET_Pos) /*!< SCB ICSR: PENDSTSET Mask */ #define SCB_ICSR_PENDSTCLR_Pos 25U /*!< SCB ICSR: PENDSTCLR Position */ #define SCB_ICSR_PENDSTCLR_Msk (1UL << SCB_ICSR_PENDSTCLR_Pos) /*!< SCB ICSR: PENDSTCLR Mask */ #define SCB_ICSR_ISRPREEMPT_Pos 23U /*!< SCB ICSR: ISRPREEMPT Position */ #define SCB_ICSR_ISRPREEMPT_Msk (1UL << SCB_ICSR_ISRPREEMPT_Pos) /*!< SCB ICSR: ISRPREEMPT Mask */ #define SCB_ICSR_ISRPENDING_Pos 22U /*!< SCB ICSR: ISRPENDING Position */ #define SCB_ICSR_ISRPENDING_Msk (1UL << SCB_ICSR_ISRPENDING_Pos) /*!< SCB ICSR: ISRPENDING Mask */ #define SCB_ICSR_VECTPENDING_Pos 12U /*!< SCB ICSR: VECTPENDING Position */ #define SCB_ICSR_VECTPENDING_Msk (0x1FFUL << SCB_ICSR_VECTPENDING_Pos) /*!< SCB ICSR: VECTPENDING Mask */ #define SCB_ICSR_VECTACTIVE_Pos 0U /*!< SCB ICSR: VECTACTIVE Position */ #define SCB_ICSR_VECTACTIVE_Msk (0x1FFUL /*<< SCB_ICSR_VECTACTIVE_Pos*/) /*!< SCB ICSR: VECTACTIVE Mask */ #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U) /* SCB Interrupt Control State Register Definitions */ #define SCB_VTOR_TBLOFF_Pos 8U /*!< SCB VTOR: TBLOFF Position */ #define SCB_VTOR_TBLOFF_Msk (0xFFFFFFUL << SCB_VTOR_TBLOFF_Pos) /*!< SCB VTOR: TBLOFF Mask */ #endif /* SCB Application Interrupt and Reset Control Register Definitions */ #define SCB_AIRCR_VECTKEY_Pos 16U /*!< SCB AIRCR: VECTKEY Position */ #define SCB_AIRCR_VECTKEY_Msk (0xFFFFUL << SCB_AIRCR_VECTKEY_Pos) /*!< SCB AIRCR: VECTKEY Mask */ #define SCB_AIRCR_VECTKEYSTAT_Pos 16U /*!< SCB AIRCR: VECTKEYSTAT Position */ #define SCB_AIRCR_VECTKEYSTAT_Msk (0xFFFFUL << SCB_AIRCR_VECTKEYSTAT_Pos) /*!< SCB AIRCR: VECTKEYSTAT Mask */ #define SCB_AIRCR_ENDIANESS_Pos 15U /*!< SCB AIRCR: ENDIANESS Position */ #define SCB_AIRCR_ENDIANESS_Msk (1UL << SCB_AIRCR_ENDIANESS_Pos) /*!< SCB AIRCR: ENDIANESS Mask */ #define SCB_AIRCR_SYSRESETREQ_Pos 2U /*!< SCB AIRCR: SYSRESETREQ Position */ #define SCB_AIRCR_SYSRESETREQ_Msk (1UL << SCB_AIRCR_SYSRESETREQ_Pos) /*!< SCB AIRCR: SYSRESETREQ Mask */ #define SCB_AIRCR_VECTCLRACTIVE_Pos 1U /*!< SCB AIRCR: VECTCLRACTIVE Position */ #define SCB_AIRCR_VECTCLRACTIVE_Msk (1UL << SCB_AIRCR_VECTCLRACTIVE_Pos) /*!< SCB AIRCR: VECTCLRACTIVE Mask */ /* SCB System Control Register Definitions */ #define SCB_SCR_SEVONPEND_Pos 4U /*!< SCB SCR: SEVONPEND Position */ #define SCB_SCR_SEVONPEND_Msk (1UL << SCB_SCR_SEVONPEND_Pos) /*!< SCB SCR: SEVONPEND Mask */ #define SCB_SCR_SLEEPDEEP_Pos 2U /*!< SCB SCR: SLEEPDEEP Position */ #define SCB_SCR_SLEEPDEEP_Msk (1UL << SCB_SCR_SLEEPDEEP_Pos) /*!< SCB SCR: SLEEPDEEP Mask */ #define SCB_SCR_SLEEPONEXIT_Pos 1U /*!< SCB SCR: SLEEPONEXIT Position */ #define SCB_SCR_SLEEPONEXIT_Msk (1UL << SCB_SCR_SLEEPONEXIT_Pos) /*!< SCB SCR: SLEEPONEXIT Mask */ /* SCB Configuration Control Register Definitions */ #define SCB_CCR_STKALIGN_Pos 9U /*!< SCB CCR: STKALIGN Position */ #define SCB_CCR_STKALIGN_Msk (1UL << SCB_CCR_STKALIGN_Pos) /*!< SCB CCR: STKALIGN Mask */ #define SCB_CCR_UNALIGN_TRP_Pos 3U /*!< SCB CCR: UNALIGN_TRP Position */ #define SCB_CCR_UNALIGN_TRP_Msk (1UL << SCB_CCR_UNALIGN_TRP_Pos) /*!< SCB CCR: UNALIGN_TRP Mask */ /* SCB System Handler Control and State Register Definitions */ #define SCB_SHCSR_SVCALLPENDED_Pos 15U /*!< SCB SHCSR: SVCALLPENDED Position */ #define SCB_SHCSR_SVCALLPENDED_Msk (1UL << SCB_SHCSR_SVCALLPENDED_Pos) /*!< SCB SHCSR: SVCALLPENDED Mask */ /*@} end of group CMSIS_SCB */ /** \ingroup CMSIS_core_register \defgroup CMSIS_SysTick System Tick Timer (SysTick) \brief Type definitions for the System Timer Registers. @{ */ /** \brief Structure type to access the System Timer (SysTick). */ typedef struct { __IOM uint32_t CTRL; /*!< Offset: 0x000 (R/W) SysTick Control and Status Register */ __IOM uint32_t LOAD; /*!< Offset: 0x004 (R/W) SysTick Reload Value Register */ __IOM uint32_t VAL; /*!< Offset: 0x008 (R/W) SysTick Current Value Register */ __IM uint32_t CALIB; /*!< Offset: 0x00C (R/ ) SysTick Calibration Register */ } SysTick_Type; /* SysTick Control / Status Register Definitions */ #define SysTick_CTRL_COUNTFLAG_Pos 16U /*!< SysTick CTRL: COUNTFLAG Position */ #define SysTick_CTRL_COUNTFLAG_Msk (1UL << SysTick_CTRL_COUNTFLAG_Pos) /*!< SysTick CTRL: COUNTFLAG Mask */ #define SysTick_CTRL_CLKSOURCE_Pos 2U /*!< SysTick CTRL: CLKSOURCE Position */ #define SysTick_CTRL_CLKSOURCE_Msk (1UL << SysTick_CTRL_CLKSOURCE_Pos) /*!< SysTick CTRL: CLKSOURCE Mask */ #define SysTick_CTRL_TICKINT_Pos 1U /*!< SysTick CTRL: TICKINT Position */ #define SysTick_CTRL_TICKINT_Msk (1UL << SysTick_CTRL_TICKINT_Pos) /*!< SysTick CTRL: TICKINT Mask */ #define SysTick_CTRL_ENABLE_Pos 0U /*!< SysTick CTRL: ENABLE Position */ #define SysTick_CTRL_ENABLE_Msk (1UL /*<< SysTick_CTRL_ENABLE_Pos*/) /*!< SysTick CTRL: ENABLE Mask */ /* SysTick Reload Register Definitions */ #define SysTick_LOAD_RELOAD_Pos 0U /*!< SysTick LOAD: RELOAD Position */ #define SysTick_LOAD_RELOAD_Msk (0xFFFFFFUL /*<< SysTick_LOAD_RELOAD_Pos*/) /*!< SysTick LOAD: RELOAD Mask */ /* SysTick Current Register Definitions */ #define SysTick_VAL_CURRENT_Pos 0U /*!< SysTick VAL: CURRENT Position */ #define SysTick_VAL_CURRENT_Msk (0xFFFFFFUL /*<< SysTick_VAL_CURRENT_Pos*/) /*!< SysTick VAL: CURRENT Mask */ /* SysTick Calibration Register Definitions */ #define SysTick_CALIB_NOREF_Pos 31U /*!< SysTick CALIB: NOREF Position */ #define SysTick_CALIB_NOREF_Msk (1UL << SysTick_CALIB_NOREF_Pos) /*!< SysTick CALIB: NOREF Mask */ #define SysTick_CALIB_SKEW_Pos 30U /*!< SysTick CALIB: SKEW Position */ #define SysTick_CALIB_SKEW_Msk (1UL << SysTick_CALIB_SKEW_Pos) /*!< SysTick CALIB: SKEW Mask */ #define SysTick_CALIB_TENMS_Pos 0U /*!< SysTick CALIB: TENMS Position */ #define SysTick_CALIB_TENMS_Msk (0xFFFFFFUL /*<< SysTick_CALIB_TENMS_Pos*/) /*!< SysTick CALIB: TENMS Mask */ /*@} end of group CMSIS_SysTick */ #if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U) /** \ingroup CMSIS_core_register \defgroup CMSIS_MPU Memory Protection Unit (MPU) \brief Type definitions for the Memory Protection Unit (MPU) @{ */ /** \brief Structure type to access the Memory Protection Unit (MPU). */ typedef struct { __IM uint32_t TYPE; /*!< Offset: 0x000 (R/ ) MPU Type Register */ __IOM uint32_t CTRL; /*!< Offset: 0x004 (R/W) MPU Control Register */ __IOM uint32_t RNR; /*!< Offset: 0x008 (R/W) MPU Region RNRber Register */ __IOM uint32_t RBAR; /*!< Offset: 0x00C (R/W) MPU Region Base Address Register */ __IOM uint32_t RASR; /*!< Offset: 0x010 (R/W) MPU Region Attribute and Size Register */ } MPU_Type; #define MPU_TYPE_RALIASES 1U /* MPU Type Register Definitions */ #define MPU_TYPE_IREGION_Pos 16U /*!< MPU TYPE: IREGION Position */ #define MPU_TYPE_IREGION_Msk (0xFFUL << MPU_TYPE_IREGION_Pos) /*!< MPU TYPE: IREGION Mask */ #define MPU_TYPE_DREGION_Pos 8U /*!< MPU TYPE: DREGION Position */ #define MPU_TYPE_DREGION_Msk (0xFFUL << MPU_TYPE_DREGION_Pos) /*!< MPU TYPE: DREGION Mask */ #define MPU_TYPE_SEPARATE_Pos 0U /*!< MPU TYPE: SEPARATE Position */ #define MPU_TYPE_SEPARATE_Msk (1UL /*<< MPU_TYPE_SEPARATE_Pos*/) /*!< MPU TYPE: SEPARATE Mask */ /* MPU Control Register Definitions */ #define MPU_CTRL_PRIVDEFENA_Pos 2U /*!< MPU CTRL: PRIVDEFENA Position */ #define MPU_CTRL_PRIVDEFENA_Msk (1UL << MPU_CTRL_PRIVDEFENA_Pos) /*!< MPU CTRL: PRIVDEFENA Mask */ #define MPU_CTRL_HFNMIENA_Pos 1U /*!< MPU CTRL: HFNMIENA Position */ #define MPU_CTRL_HFNMIENA_Msk (1UL << MPU_CTRL_HFNMIENA_Pos) /*!< MPU CTRL: HFNMIENA Mask */ #define MPU_CTRL_ENABLE_Pos 0U /*!< MPU CTRL: ENABLE Position */ #define MPU_CTRL_ENABLE_Msk (1UL /*<< MPU_CTRL_ENABLE_Pos*/) /*!< MPU CTRL: ENABLE Mask */ /* MPU Region Number Register Definitions */ #define MPU_RNR_REGION_Pos 0U /*!< MPU RNR: REGION Position */ #define MPU_RNR_REGION_Msk (0xFFUL /*<< MPU_RNR_REGION_Pos*/) /*!< MPU RNR: REGION Mask */ /* MPU Region Base Address Register Definitions */ #define MPU_RBAR_ADDR_Pos 8U /*!< MPU RBAR: ADDR Position */ #define MPU_RBAR_ADDR_Msk (0xFFFFFFUL << MPU_RBAR_ADDR_Pos) /*!< MPU RBAR: ADDR Mask */ #define MPU_RBAR_VALID_Pos 4U /*!< MPU RBAR: VALID Position */ #define MPU_RBAR_VALID_Msk (1UL << MPU_RBAR_VALID_Pos) /*!< MPU RBAR: VALID Mask */ #define MPU_RBAR_REGION_Pos 0U /*!< MPU RBAR: REGION Position */ #define MPU_RBAR_REGION_Msk (0xFUL /*<< MPU_RBAR_REGION_Pos*/) /*!< MPU RBAR: REGION Mask */ /* MPU Region Attribute and Size Register Definitions */ #define MPU_RASR_ATTRS_Pos 16U /*!< MPU RASR: MPU Region Attribute field Position */ #define MPU_RASR_ATTRS_Msk (0xFFFFUL << MPU_RASR_ATTRS_Pos) /*!< MPU RASR: MPU Region Attribute field Mask */ #define MPU_RASR_XN_Pos 28U /*!< MPU RASR: ATTRS.XN Position */ #define MPU_RASR_XN_Msk (1UL << MPU_RASR_XN_Pos) /*!< MPU RASR: ATTRS.XN Mask */ #define MPU_RASR_AP_Pos 24U /*!< MPU RASR: ATTRS.AP Position */ #define MPU_RASR_AP_Msk (0x7UL << MPU_RASR_AP_Pos) /*!< MPU RASR: ATTRS.AP Mask */ #define MPU_RASR_TEX_Pos 19U /*!< MPU RASR: ATTRS.TEX Position */ #define MPU_RASR_TEX_Msk (0x7UL << MPU_RASR_TEX_Pos) /*!< MPU RASR: ATTRS.TEX Mask */ #define MPU_RASR_S_Pos 18U /*!< MPU RASR: ATTRS.S Position */ #define MPU_RASR_S_Msk (1UL << MPU_RASR_S_Pos) /*!< MPU RASR: ATTRS.S Mask */ #define MPU_RASR_C_Pos 17U /*!< MPU RASR: ATTRS.C Position */ #define MPU_RASR_C_Msk (1UL << MPU_RASR_C_Pos) /*!< MPU RASR: ATTRS.C Mask */ #define MPU_RASR_B_Pos 16U /*!< MPU RASR: ATTRS.B Position */ #define MPU_RASR_B_Msk (1UL << MPU_RASR_B_Pos) /*!< MPU RASR: ATTRS.B Mask */ #define MPU_RASR_SRD_Pos 8U /*!< MPU RASR: Sub-Region Disable Position */ #define MPU_RASR_SRD_Msk (0xFFUL << MPU_RASR_SRD_Pos) /*!< MPU RASR: Sub-Region Disable Mask */ #define MPU_RASR_SIZE_Pos 1U /*!< MPU RASR: Region Size Field Position */ #define MPU_RASR_SIZE_Msk (0x1FUL << MPU_RASR_SIZE_Pos) /*!< MPU RASR: Region Size Field Mask */ #define MPU_RASR_ENABLE_Pos 0U /*!< MPU RASR: Region enable bit Position */ #define MPU_RASR_ENABLE_Msk (1UL /*<< MPU_RASR_ENABLE_Pos*/) /*!< MPU RASR: Region enable bit Disable Mask */ /*@} end of group CMSIS_MPU */ #endif /** \ingroup CMSIS_core_register \defgroup CMSIS_CoreDebug Core Debug Registers (CoreDebug) \brief Cortex-M0+ Core Debug Registers (DCB registers, SHCSR, and DFSR) are only accessible over DAP and not via processor. Therefore they are not covered by the Cortex-M0+ header file. @{ */ /*@} end of group CMSIS_CoreDebug */ /** \ingroup CMSIS_core_register \defgroup CMSIS_core_bitfield Core register bit field macros \brief Macros for use with bit field definitions (xxx_Pos, xxx_Msk). @{ */ /** \brief Mask and shift a bit field value for use in a register bit range. \param[in] field Name of the register bit field. \param[in] value Value of the bit field. This parameter is interpreted as an uint32_t type. \return Masked and shifted value. */ #define _VAL2FLD(field, value) (((uint32_t)(value) << field ## _Pos) & field ## _Msk) /** \brief Mask and shift a register value to extract a bit filed value. \param[in] field Name of the register bit field. \param[in] value Value of register. This parameter is interpreted as an uint32_t type. \return Masked and shifted bit field value. */ #define _FLD2VAL(field, value) (((uint32_t)(value) & field ## _Msk) >> field ## _Pos) /*@} end of group CMSIS_core_bitfield */ /** \ingroup CMSIS_core_register \defgroup CMSIS_core_base Core Definitions \brief Definitions for base addresses, unions, and structures. @{ */ /* Memory mapping of Core Hardware */ #define SCS_BASE (0xE000E000UL) /*!< System Control Space Base Address */ #define SysTick_BASE (SCS_BASE + 0x0010UL) /*!< SysTick Base Address */ #define NVIC_BASE (SCS_BASE + 0x0100UL) /*!< NVIC Base Address */ #define SCB_BASE (SCS_BASE + 0x0D00UL) /*!< System Control Block Base Address */ #define SCB ((SCB_Type *) SCB_BASE ) /*!< SCB configuration struct */ #define SysTick ((SysTick_Type *) SysTick_BASE ) /*!< SysTick configuration struct */ #define NVIC ((NVIC_Type *) NVIC_BASE ) /*!< NVIC configuration struct */ #if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U) #define MPU_BASE (SCS_BASE + 0x0D90UL) /*!< Memory Protection Unit */ #define MPU ((MPU_Type *) MPU_BASE ) /*!< Memory Protection Unit */ #endif /*@} */ /******************************************************************************* * Hardware Abstraction Layer Core Function Interface contains: - Core NVIC Functions - Core SysTick Functions - Core Register Access Functions ******************************************************************************/ /** \defgroup CMSIS_Core_FunctionInterface Functions and Instructions Reference */ /* ########################## NVIC functions #################################### */ /** \ingroup CMSIS_Core_FunctionInterface \defgroup CMSIS_Core_NVICFunctions NVIC Functions \brief Functions that manage interrupts and exceptions via the NVIC. @{ */ #ifdef CMSIS_NVIC_VIRTUAL #ifndef CMSIS_NVIC_VIRTUAL_HEADER_FILE #define CMSIS_NVIC_VIRTUAL_HEADER_FILE "cmsis_nvic_virtual.h" #endif #include CMSIS_NVIC_VIRTUAL_HEADER_FILE #else #define NVIC_SetPriorityGrouping __NVIC_SetPriorityGrouping #define NVIC_GetPriorityGrouping __NVIC_GetPriorityGrouping #define NVIC_EnableIRQ __NVIC_EnableIRQ #define NVIC_GetEnableIRQ __NVIC_GetEnableIRQ #define NVIC_DisableIRQ __NVIC_DisableIRQ #define NVIC_GetPendingIRQ __NVIC_GetPendingIRQ #define NVIC_SetPendingIRQ __NVIC_SetPendingIRQ #define NVIC_ClearPendingIRQ __NVIC_ClearPendingIRQ /*#define NVIC_GetActive __NVIC_GetActive not available for Cortex-M0+ */ #define NVIC_SetPriority __NVIC_SetPriority #define NVIC_GetPriority __NVIC_GetPriority #define NVIC_SystemReset __NVIC_SystemReset #endif /* CMSIS_NVIC_VIRTUAL */ #ifdef CMSIS_VECTAB_VIRTUAL #ifndef CMSIS_VECTAB_VIRTUAL_HEADER_FILE #define CMSIS_VECTAB_VIRTUAL_HEADER_FILE "cmsis_vectab_virtual.h" #endif #include CMSIS_VECTAB_VIRTUAL_HEADER_FILE #else #define NVIC_SetVector __NVIC_SetVector #define NVIC_GetVector __NVIC_GetVector #endif /* (CMSIS_VECTAB_VIRTUAL) */ #define NVIC_USER_IRQ_OFFSET 16 /* The following EXC_RETURN values are saved the LR on exception entry */ #define EXC_RETURN_HANDLER (0xFFFFFFF1UL) /* return to Handler mode, uses MSP after return */ #define EXC_RETURN_THREAD_MSP (0xFFFFFFF9UL) /* return to Thread mode, uses MSP after return */ #define EXC_RETURN_THREAD_PSP (0xFFFFFFFDUL) /* return to Thread mode, uses PSP after return */ /* Interrupt Priorities are WORD accessible only under Armv6-M */ /* The following MACROS handle generation of the register offset and byte masks */ #define _BIT_SHIFT(IRQn) ( ((((uint32_t)(int32_t)(IRQn)) ) & 0x03UL) * 8UL) #define _SHP_IDX(IRQn) ( (((((uint32_t)(int32_t)(IRQn)) & 0x0FUL)-8UL) >> 2UL) ) #define _IP_IDX(IRQn) ( (((uint32_t)(int32_t)(IRQn)) >> 2UL) ) #define __NVIC_SetPriorityGrouping(X) (void)(X) #define __NVIC_GetPriorityGrouping() (0U) /** \brief Enable Interrupt \details Enables a device specific interrupt in the NVIC interrupt controller. \param [in] IRQn Device specific interrupt number. \note IRQn must not be negative. */ __STATIC_INLINE void __NVIC_EnableIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { NVIC->ISER[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL)); } } /** \brief Get Interrupt Enable status \details Returns a device specific interrupt enable status from the NVIC interrupt controller. \param [in] IRQn Device specific interrupt number. \return 0 Interrupt is not enabled. \return 1 Interrupt is enabled. \note IRQn must not be negative. */ __STATIC_INLINE uint32_t __NVIC_GetEnableIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { return((uint32_t)(((NVIC->ISER[0U] & (1UL << (((uint32_t)IRQn) & 0x1FUL))) != 0UL) ? 1UL : 0UL)); } else { return(0U); } } /** \brief Disable Interrupt \details Disables a device specific interrupt in the NVIC interrupt controller. \param [in] IRQn Device specific interrupt number. \note IRQn must not be negative. */ __STATIC_INLINE void __NVIC_DisableIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { NVIC->ICER[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL)); __DSB(); __ISB(); } } /** \brief Get Pending Interrupt \details Reads the NVIC pending register and returns the pending bit for the specified device specific interrupt. \param [in] IRQn Device specific interrupt number. \return 0 Interrupt status is not pending. \return 1 Interrupt status is pending. \note IRQn must not be negative. */ __STATIC_INLINE uint32_t __NVIC_GetPendingIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { return((uint32_t)(((NVIC->ISPR[0U] & (1UL << (((uint32_t)IRQn) & 0x1FUL))) != 0UL) ? 1UL : 0UL)); } else { return(0U); } } /** \brief Set Pending Interrupt \details Sets the pending bit of a device specific interrupt in the NVIC pending register. \param [in] IRQn Device specific interrupt number. \note IRQn must not be negative. */ __STATIC_INLINE void __NVIC_SetPendingIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { NVIC->ISPR[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL)); } } /** \brief Clear Pending Interrupt \details Clears the pending bit of a device specific interrupt in the NVIC pending register. \param [in] IRQn Device specific interrupt number. \note IRQn must not be negative. */ __STATIC_INLINE void __NVIC_ClearPendingIRQ(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { NVIC->ICPR[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL)); } } /** \brief Set Interrupt Priority \details Sets the priority of a device specific interrupt or a processor exception. The interrupt number can be positive to specify a device specific interrupt, or negative to specify a processor exception. \param [in] IRQn Interrupt number. \param [in] priority Priority to set. \note The priority cannot be set for every processor exception. */ __STATIC_INLINE void __NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority) { if ((int32_t)(IRQn) >= 0) { NVIC->IP[_IP_IDX(IRQn)] = ((uint32_t)(NVIC->IP[_IP_IDX(IRQn)] & ~(0xFFUL << _BIT_SHIFT(IRQn))) | (((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL) << _BIT_SHIFT(IRQn))); } else { SCB->SHP[_SHP_IDX(IRQn)] = ((uint32_t)(SCB->SHP[_SHP_IDX(IRQn)] & ~(0xFFUL << _BIT_SHIFT(IRQn))) | (((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL) << _BIT_SHIFT(IRQn))); } } /** \brief Get Interrupt Priority \details Reads the priority of a device specific interrupt or a processor exception. The interrupt number can be positive to specify a device specific interrupt, or negative to specify a processor exception. \param [in] IRQn Interrupt number. \return Interrupt Priority. Value is aligned automatically to the implemented priority bits of the microcontroller. */ __STATIC_INLINE uint32_t __NVIC_GetPriority(IRQn_Type IRQn) { if ((int32_t)(IRQn) >= 0) { return((uint32_t)(((NVIC->IP[ _IP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) & (uint32_t)0xFFUL) >> (8U - __NVIC_PRIO_BITS))); } else { return((uint32_t)(((SCB->SHP[_SHP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) & (uint32_t)0xFFUL) >> (8U - __NVIC_PRIO_BITS))); } } /** \brief Encode Priority \details Encodes the priority for an interrupt with the given priority group, preemptive priority value, and subpriority value. In case of a conflict between priority grouping and available priority bits (__NVIC_PRIO_BITS), the smallest possible priority group is set. \param [in] PriorityGroup Used priority group. \param [in] PreemptPriority Preemptive priority value (starting from 0). \param [in] SubPriority Subpriority value (starting from 0). \return Encoded priority. Value can be used in the function \ref NVIC_SetPriority(). */ __STATIC_INLINE uint32_t NVIC_EncodePriority (uint32_t PriorityGroup, uint32_t PreemptPriority, uint32_t SubPriority) { uint32_t PriorityGroupTmp = (PriorityGroup & (uint32_t)0x07UL); /* only values 0..7 are used */ uint32_t PreemptPriorityBits; uint32_t SubPriorityBits; PreemptPriorityBits = ((7UL - PriorityGroupTmp) > (uint32_t)(__NVIC_PRIO_BITS)) ? (uint32_t)(__NVIC_PRIO_BITS) : (uint32_t)(7UL - PriorityGroupTmp); SubPriorityBits = ((PriorityGroupTmp + (uint32_t)(__NVIC_PRIO_BITS)) < (uint32_t)7UL) ? (uint32_t)0UL : (uint32_t)((PriorityGroupTmp - 7UL) + (uint32_t)(__NVIC_PRIO_BITS)); return ( ((PreemptPriority & (uint32_t)((1UL << (PreemptPriorityBits)) - 1UL)) << SubPriorityBits) | ((SubPriority & (uint32_t)((1UL << (SubPriorityBits )) - 1UL))) ); } /** \brief Decode Priority \details Decodes an interrupt priority value with a given priority group to preemptive priority value and subpriority value. In case of a conflict between priority grouping and available priority bits (__NVIC_PRIO_BITS) the smallest possible priority group is set. \param [in] Priority Priority value, which can be retrieved with the function \ref NVIC_GetPriority(). \param [in] PriorityGroup Used priority group. \param [out] pPreemptPriority Preemptive priority value (starting from 0). \param [out] pSubPriority Subpriority value (starting from 0). */ __STATIC_INLINE void NVIC_DecodePriority (uint32_t Priority, uint32_t PriorityGroup, uint32_t* const pPreemptPriority, uint32_t* const pSubPriority) { uint32_t PriorityGroupTmp = (PriorityGroup & (uint32_t)0x07UL); /* only values 0..7 are used */ uint32_t PreemptPriorityBits; uint32_t SubPriorityBits; PreemptPriorityBits = ((7UL - PriorityGroupTmp) > (uint32_t)(__NVIC_PRIO_BITS)) ? (uint32_t)(__NVIC_PRIO_BITS) : (uint32_t)(7UL - PriorityGroupTmp); SubPriorityBits = ((PriorityGroupTmp + (uint32_t)(__NVIC_PRIO_BITS)) < (uint32_t)7UL) ? (uint32_t)0UL : (uint32_t)((PriorityGroupTmp - 7UL) + (uint32_t)(__NVIC_PRIO_BITS)); *pPreemptPriority = (Priority >> SubPriorityBits) & (uint32_t)((1UL << (PreemptPriorityBits)) - 1UL); *pSubPriority = (Priority ) & (uint32_t)((1UL << (SubPriorityBits )) - 1UL); } /** \brief Set Interrupt Vector \details Sets an interrupt vector in SRAM based interrupt vector table. The interrupt number can be positive to specify a device specific interrupt, or negative to specify a processor exception. VTOR must been relocated to SRAM before. If VTOR is not present address 0 must be mapped to SRAM. \param [in] IRQn Interrupt number \param [in] vector Address of interrupt handler function */ __STATIC_INLINE void __NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) { #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U) uint32_t vectors = SCB->VTOR; #else uint32_t vectors = 0x0U; #endif (* (int *) (vectors + ((int32_t)IRQn + NVIC_USER_IRQ_OFFSET) * 4)) = vector; } /** \brief Get Interrupt Vector \details Reads an interrupt vector from interrupt vector table. The interrupt number can be positive to specify a device specific interrupt, or negative to specify a processor exception. \param [in] IRQn Interrupt number. \return Address of interrupt handler function */ __STATIC_INLINE uint32_t __NVIC_GetVector(IRQn_Type IRQn) { #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U) uint32_t vectors = SCB->VTOR; #else uint32_t vectors = 0x0U; #endif return (uint32_t)(* (int *) (vectors + ((int32_t)IRQn + NVIC_USER_IRQ_OFFSET) * 4)); } /** \brief System Reset \details Initiates a system reset request to reset the MCU. */ __NO_RETURN __STATIC_INLINE void __NVIC_SystemReset(void) { __DSB(); /* Ensure all outstanding memory accesses included buffered write are completed before reset */ SCB->AIRCR = ((0x5FAUL << SCB_AIRCR_VECTKEY_Pos) | SCB_AIRCR_SYSRESETREQ_Msk); __DSB(); /* Ensure completion of memory access */ for(;;) /* wait until reset */ { __NOP(); } } /*@} end of CMSIS_Core_NVICFunctions */ /* ########################## MPU functions #################################### */ #if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U) #include "mpu_armv7.h" #endif /* ########################## FPU functions #################################### */ /** \ingroup CMSIS_Core_FunctionInterface \defgroup CMSIS_Core_FpuFunctions FPU Functions \brief Function that provides FPU type. @{ */ /** \brief get FPU type \details returns the FPU type \returns - \b 0: No FPU - \b 1: Single precision FPU - \b 2: Double + Single precision FPU */ __STATIC_INLINE uint32_t SCB_GetFPUType(void) { return 0U; /* No FPU */ } /*@} end of CMSIS_Core_FpuFunctions */ /* ################################## SysTick function ############################################ */ /** \ingroup CMSIS_Core_FunctionInterface \defgroup CMSIS_Core_SysTickFunctions SysTick Functions \brief Functions that configure the System. @{ */ #if defined (__Vendor_SysTickConfig) && (__Vendor_SysTickConfig == 0U) /** \brief System Tick Configuration \details Initializes the System Timer and its interrupt, and starts the System Tick Timer. Counter is in free running mode to generate periodic interrupts. \param [in] ticks Number of ticks between two interrupts. \return 0 Function succeeded. \return 1 Function failed. \note When the variable <b>__Vendor_SysTickConfig</b> is set to 1, then the function <b>SysTick_Config</b> is not included. In this case, the file <b><i>device</i>.h</b> must contain a vendor-specific implementation of this function. */ __STATIC_INLINE uint32_t SysTick_Config(uint32_t ticks) { if ((ticks - 1UL) > SysTick_LOAD_RELOAD_Msk) { return (1UL); /* Reload value impossible */ } SysTick->LOAD = (uint32_t)(ticks - 1UL); /* set reload register */ NVIC_SetPriority (SysTick_IRQn, (1UL << __NVIC_PRIO_BITS) - 1UL); /* set Priority for Systick Interrupt */ SysTick->VAL = 0UL; /* Load the SysTick Counter Value */ SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk; /* Enable SysTick IRQ and SysTick Timer */ return (0UL); /* Function successful */ } #endif /*@} end of CMSIS_Core_SysTickFunctions */ #ifdef __cplusplus } #endif #endif /* __CORE_CM0PLUS_H_DEPENDANT */ #endif /* __CMSIS_GENERIC */ |