core_cm0plus.h

Go to the documentation of this file.

/**************************************************************************/
/*
 * 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
 
/*******************************************************************************
 *                 CMSIS definitions
 ******************************************************************************/
#include "cmsis_version.h"
 
/*  CMSIS CM0+ definitions */
#define __CM0PLUS_CMSIS_VERSION_MAIN (__CM_CMSIS_VERSION_MAIN)                  
#define __CM0PLUS_CMSIS_VERSION_SUB  (__CM_CMSIS_VERSION_SUB)                   
#define __CM0PLUS_CMSIS_VERSION      ((__CM0PLUS_CMSIS_VERSION_MAIN << 16U) | \
                                       __CM0PLUS_CMSIS_VERSION_SUB           )  
#define __CORTEX_M                   (0U)                                       
#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_PCS_VFP
    #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) */
#ifdef __cplusplus
  #define   __I     volatile             
#else
  #define   __I     volatile const       
#endif
#define     __O     volatile             
#define     __IO    volatile             
/* following defines should be used for structure members */
#define     __IM     volatile const      
#define     __OM     volatile            
#define     __IOM    volatile            
/*******************************************************************************
 *                 Register Abstraction
  Core Register contain:
  - Core Register
  - Core NVIC Register
  - Core SCB Register
  - Core SysTick Register
  - Core MPU Register
 ******************************************************************************/
typedef union
{
  struct
  {
    uint32_t _reserved0:28;              
    uint32_t V:1;                        
    uint32_t C:1;                        
    uint32_t Z:1;                        
    uint32_t N:1;                        
  } b;                                   
  uint32_t w;                            
} APSR_Type;
 
/* APSR Register Definitions */
#define APSR_N_Pos                         31U                                            
#define APSR_N_Msk                         (1UL << APSR_N_Pos)                            
#define APSR_Z_Pos                         30U                                            
#define APSR_Z_Msk                         (1UL << APSR_Z_Pos)                            
#define APSR_C_Pos                         29U                                            
#define APSR_C_Msk                         (1UL << APSR_C_Pos)                            
#define APSR_V_Pos                         28U                                            
#define APSR_V_Msk                         (1UL << APSR_V_Pos)                            
typedef union
{
  struct
  {
    uint32_t ISR:9;                      
    uint32_t _reserved0:23;              
  } b;                                   
  uint32_t w;                            
} IPSR_Type;
 
/* IPSR Register Definitions */
#define IPSR_ISR_Pos                        0U                                            
#define IPSR_ISR_Msk                       (0x1FFUL /*<< IPSR_ISR_Pos*/)                  
typedef union
{
  struct
  {
    uint32_t ISR:9;                      
    uint32_t _reserved0:15;              
    uint32_t T:1;                        
    uint32_t _reserved1:3;               
    uint32_t V:1;                        
    uint32_t C:1;                        
    uint32_t Z:1;                        
    uint32_t N:1;                        
  } b;                                   
  uint32_t w;                            
} xPSR_Type;
 
/* xPSR Register Definitions */
#define xPSR_N_Pos                         31U                                            
#define xPSR_N_Msk                         (1UL << xPSR_N_Pos)                            
#define xPSR_Z_Pos                         30U                                            
#define xPSR_Z_Msk                         (1UL << xPSR_Z_Pos)                            
#define xPSR_C_Pos                         29U                                            
#define xPSR_C_Msk                         (1UL << xPSR_C_Pos)                            
#define xPSR_V_Pos                         28U                                            
#define xPSR_V_Msk                         (1UL << xPSR_V_Pos)                            
#define xPSR_T_Pos                         24U                                            
#define xPSR_T_Msk                         (1UL << xPSR_T_Pos)                            
#define xPSR_ISR_Pos                        0U                                            
#define xPSR_ISR_Msk                       (0x1FFUL /*<< xPSR_ISR_Pos*/)                  
typedef union
{
  struct
  {
    uint32_t nPRIV:1;                    
    uint32_t SPSEL:1;                    
    uint32_t _reserved1:30;              
  } b;                                   
  uint32_t w;                            
} CONTROL_Type;
 
/* CONTROL Register Definitions */
#define CONTROL_SPSEL_Pos                   1U                                            
#define CONTROL_SPSEL_Msk                  (1UL << CONTROL_SPSEL_Pos)                     
#define CONTROL_nPRIV_Pos                   0U                                            
#define CONTROL_nPRIV_Msk                  (1UL /*<< CONTROL_nPRIV_Pos*/)                 
typedef struct
{
  __IOM uint32_t ISER[1U];               
        uint32_t RESERVED0[31U];
  __IOM uint32_t ICER[1U];               
        uint32_t RSERVED1[31U];
  __IOM uint32_t ISPR[1U];               
        uint32_t RESERVED2[31U];
  __IOM uint32_t ICPR[1U];               
        uint32_t RESERVED3[31U];
        uint32_t RESERVED4[64U];
  __IOM uint32_t IP[8U];                 
}  NVIC_Type;
 
typedef struct
{
  __IM  uint32_t CPUID;                  
  __IOM uint32_t ICSR;                   
#if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
  __IOM uint32_t VTOR;                   
#else
        uint32_t RESERVED0;
#endif
  __IOM uint32_t AIRCR;                  
  __IOM uint32_t SCR;                    
  __IOM uint32_t CCR;                    
        uint32_t RESERVED1;
  __IOM uint32_t SHP[2U];                
  __IOM uint32_t SHCSR;                  
} SCB_Type;
 
/* SCB CPUID Register Definitions */
#define SCB_CPUID_IMPLEMENTER_Pos          24U                                            
#define SCB_CPUID_IMPLEMENTER_Msk          (0xFFUL << SCB_CPUID_IMPLEMENTER_Pos)          
#define SCB_CPUID_VARIANT_Pos              20U                                            
#define SCB_CPUID_VARIANT_Msk              (0xFUL << SCB_CPUID_VARIANT_Pos)               
#define SCB_CPUID_ARCHITECTURE_Pos         16U                                            
#define SCB_CPUID_ARCHITECTURE_Msk         (0xFUL << SCB_CPUID_ARCHITECTURE_Pos)          
#define SCB_CPUID_PARTNO_Pos                4U                                            
#define SCB_CPUID_PARTNO_Msk               (0xFFFUL << SCB_CPUID_PARTNO_Pos)              
#define SCB_CPUID_REVISION_Pos              0U                                            
#define SCB_CPUID_REVISION_Msk             (0xFUL /*<< SCB_CPUID_REVISION_Pos*/)          
/* SCB Interrupt Control State Register Definitions */
#define SCB_ICSR_NMIPENDSET_Pos            31U                                            
#define SCB_ICSR_NMIPENDSET_Msk            (1UL << SCB_ICSR_NMIPENDSET_Pos)               
#define SCB_ICSR_PENDSVSET_Pos             28U                                            
#define SCB_ICSR_PENDSVSET_Msk             (1UL << SCB_ICSR_PENDSVSET_Pos)                
#define SCB_ICSR_PENDSVCLR_Pos             27U                                            
#define SCB_ICSR_PENDSVCLR_Msk             (1UL << SCB_ICSR_PENDSVCLR_Pos)                
#define SCB_ICSR_PENDSTSET_Pos             26U                                            
#define SCB_ICSR_PENDSTSET_Msk             (1UL << SCB_ICSR_PENDSTSET_Pos)                
#define SCB_ICSR_PENDSTCLR_Pos             25U                                            
#define SCB_ICSR_PENDSTCLR_Msk             (1UL << SCB_ICSR_PENDSTCLR_Pos)                
#define SCB_ICSR_ISRPREEMPT_Pos            23U                                            
#define SCB_ICSR_ISRPREEMPT_Msk            (1UL << SCB_ICSR_ISRPREEMPT_Pos)               
#define SCB_ICSR_ISRPENDING_Pos            22U                                            
#define SCB_ICSR_ISRPENDING_Msk            (1UL << SCB_ICSR_ISRPENDING_Pos)               
#define SCB_ICSR_VECTPENDING_Pos           12U                                            
#define SCB_ICSR_VECTPENDING_Msk           (0x1FFUL << SCB_ICSR_VECTPENDING_Pos)          
#define SCB_ICSR_VECTACTIVE_Pos             0U                                            
#define SCB_ICSR_VECTACTIVE_Msk            (0x1FFUL /*<< SCB_ICSR_VECTACTIVE_Pos*/)       
#if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
/* SCB Interrupt Control State Register Definitions */
#define SCB_VTOR_TBLOFF_Pos                 8U                                            
#define SCB_VTOR_TBLOFF_Msk                (0xFFFFFFUL << SCB_VTOR_TBLOFF_Pos)            
#endif
 
/* SCB Application Interrupt and Reset Control Register Definitions */
#define SCB_AIRCR_VECTKEY_Pos              16U                                            
#define SCB_AIRCR_VECTKEY_Msk              (0xFFFFUL << SCB_AIRCR_VECTKEY_Pos)            
#define SCB_AIRCR_VECTKEYSTAT_Pos          16U                                            
#define SCB_AIRCR_VECTKEYSTAT_Msk          (0xFFFFUL << SCB_AIRCR_VECTKEYSTAT_Pos)        
#define SCB_AIRCR_ENDIANESS_Pos            15U                                            
#define SCB_AIRCR_ENDIANESS_Msk            (1UL << SCB_AIRCR_ENDIANESS_Pos)               
#define SCB_AIRCR_SYSRESETREQ_Pos           2U                                            
#define SCB_AIRCR_SYSRESETREQ_Msk          (1UL << SCB_AIRCR_SYSRESETREQ_Pos)             
#define SCB_AIRCR_VECTCLRACTIVE_Pos         1U                                            
#define SCB_AIRCR_VECTCLRACTIVE_Msk        (1UL << SCB_AIRCR_VECTCLRACTIVE_Pos)           
/* SCB System Control Register Definitions */
#define SCB_SCR_SEVONPEND_Pos               4U                                            
#define SCB_SCR_SEVONPEND_Msk              (1UL << SCB_SCR_SEVONPEND_Pos)                 
#define SCB_SCR_SLEEPDEEP_Pos               2U                                            
#define SCB_SCR_SLEEPDEEP_Msk              (1UL << SCB_SCR_SLEEPDEEP_Pos)                 
#define SCB_SCR_SLEEPONEXIT_Pos             1U                                            
#define SCB_SCR_SLEEPONEXIT_Msk            (1UL << SCB_SCR_SLEEPONEXIT_Pos)               
/* SCB Configuration Control Register Definitions */
#define SCB_CCR_STKALIGN_Pos                9U                                            
#define SCB_CCR_STKALIGN_Msk               (1UL << SCB_CCR_STKALIGN_Pos)                  
#define SCB_CCR_UNALIGN_TRP_Pos             3U                                            
#define SCB_CCR_UNALIGN_TRP_Msk            (1UL << SCB_CCR_UNALIGN_TRP_Pos)               
/* SCB System Handler Control and State Register Definitions */
#define SCB_SHCSR_SVCALLPENDED_Pos         15U                                            
#define SCB_SHCSR_SVCALLPENDED_Msk         (1UL << SCB_SHCSR_SVCALLPENDED_Pos)            
typedef struct
{
  __IOM uint32_t CTRL;                   
  __IOM uint32_t LOAD;                   
  __IOM uint32_t VAL;                    
  __IM  uint32_t CALIB;                  
} SysTick_Type;
 
/* SysTick Control / Status Register Definitions */
#define SysTick_CTRL_COUNTFLAG_Pos         16U                                            
#define SysTick_CTRL_COUNTFLAG_Msk         (1UL << SysTick_CTRL_COUNTFLAG_Pos)            
#define SysTick_CTRL_CLKSOURCE_Pos          2U                                            
#define SysTick_CTRL_CLKSOURCE_Msk         (1UL << SysTick_CTRL_CLKSOURCE_Pos)            
#define SysTick_CTRL_TICKINT_Pos            1U                                            
#define SysTick_CTRL_TICKINT_Msk           (1UL << SysTick_CTRL_TICKINT_Pos)              
#define SysTick_CTRL_ENABLE_Pos             0U                                            
#define SysTick_CTRL_ENABLE_Msk            (1UL /*<< SysTick_CTRL_ENABLE_Pos*/)           
/* SysTick Reload Register Definitions */
#define SysTick_LOAD_RELOAD_Pos             0U                                            
#define SysTick_LOAD_RELOAD_Msk            (0xFFFFFFUL /*<< SysTick_LOAD_RELOAD_Pos*/)    
/* SysTick Current Register Definitions */
#define SysTick_VAL_CURRENT_Pos             0U                                            
#define SysTick_VAL_CURRENT_Msk            (0xFFFFFFUL /*<< SysTick_VAL_CURRENT_Pos*/)    
/* SysTick Calibration Register Definitions */
#define SysTick_CALIB_NOREF_Pos            31U                                            
#define SysTick_CALIB_NOREF_Msk            (1UL << SysTick_CALIB_NOREF_Pos)               
#define SysTick_CALIB_SKEW_Pos             30U                                            
#define SysTick_CALIB_SKEW_Msk             (1UL << SysTick_CALIB_SKEW_Pos)                
#define SysTick_CALIB_TENMS_Pos             0U                                            
#define SysTick_CALIB_TENMS_Msk            (0xFFFFFFUL /*<< SysTick_CALIB_TENMS_Pos*/)    
#if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U)
typedef struct
{
  __IM  uint32_t TYPE;                   
  __IOM uint32_t CTRL;                   
  __IOM uint32_t RNR;                    
  __IOM uint32_t RBAR;                   
  __IOM uint32_t RASR;                   
} MPU_Type;
 
#define MPU_TYPE_RALIASES                  1U
 
/* MPU Type Register Definitions */
#define MPU_TYPE_IREGION_Pos               16U                                            
#define MPU_TYPE_IREGION_Msk               (0xFFUL << MPU_TYPE_IREGION_Pos)               
#define MPU_TYPE_DREGION_Pos                8U                                            
#define MPU_TYPE_DREGION_Msk               (0xFFUL << MPU_TYPE_DREGION_Pos)               
#define MPU_TYPE_SEPARATE_Pos               0U                                            
#define MPU_TYPE_SEPARATE_Msk              (1UL /*<< MPU_TYPE_SEPARATE_Pos*/)             
/* MPU Control Register Definitions */
#define MPU_CTRL_PRIVDEFENA_Pos             2U                                            
#define MPU_CTRL_PRIVDEFENA_Msk            (1UL << MPU_CTRL_PRIVDEFENA_Pos)               
#define MPU_CTRL_HFNMIENA_Pos               1U                                            
#define MPU_CTRL_HFNMIENA_Msk              (1UL << MPU_CTRL_HFNMIENA_Pos)                 
#define MPU_CTRL_ENABLE_Pos                 0U                                            
#define MPU_CTRL_ENABLE_Msk                (1UL /*<< MPU_CTRL_ENABLE_Pos*/)               
/* MPU Region Number Register Definitions */
#define MPU_RNR_REGION_Pos                  0U                                            
#define MPU_RNR_REGION_Msk                 (0xFFUL /*<< MPU_RNR_REGION_Pos*/)             
/* MPU Region Base Address Register Definitions */
#define MPU_RBAR_ADDR_Pos                   8U                                            
#define MPU_RBAR_ADDR_Msk                  (0xFFFFFFUL << MPU_RBAR_ADDR_Pos)              
#define MPU_RBAR_VALID_Pos                  4U                                            
#define MPU_RBAR_VALID_Msk                 (1UL << MPU_RBAR_VALID_Pos)                    
#define MPU_RBAR_REGION_Pos                 0U                                            
#define MPU_RBAR_REGION_Msk                (0xFUL /*<< MPU_RBAR_REGION_Pos*/)             
/* MPU Region Attribute and Size Register Definitions */
#define MPU_RASR_ATTRS_Pos                 16U                                            
#define MPU_RASR_ATTRS_Msk                 (0xFFFFUL << MPU_RASR_ATTRS_Pos)               
#define MPU_RASR_XN_Pos                    28U                                            
#define MPU_RASR_XN_Msk                    (1UL << MPU_RASR_XN_Pos)                       
#define MPU_RASR_AP_Pos                    24U                                            
#define MPU_RASR_AP_Msk                    (0x7UL << MPU_RASR_AP_Pos)                     
#define MPU_RASR_TEX_Pos                   19U                                            
#define MPU_RASR_TEX_Msk                   (0x7UL << MPU_RASR_TEX_Pos)                    
#define MPU_RASR_S_Pos                     18U                                            
#define MPU_RASR_S_Msk                     (1UL << MPU_RASR_S_Pos)                        
#define MPU_RASR_C_Pos                     17U                                            
#define MPU_RASR_C_Msk                     (1UL << MPU_RASR_C_Pos)                        
#define MPU_RASR_B_Pos                     16U                                            
#define MPU_RASR_B_Msk                     (1UL << MPU_RASR_B_Pos)                        
#define MPU_RASR_SRD_Pos                    8U                                            
#define MPU_RASR_SRD_Msk                   (0xFFUL << MPU_RASR_SRD_Pos)                   
#define MPU_RASR_SIZE_Pos                   1U                                            
#define MPU_RASR_SIZE_Msk                  (0x1FUL << MPU_RASR_SIZE_Pos)                  
#define MPU_RASR_ENABLE_Pos                 0U                                            
#define MPU_RASR_ENABLE_Msk                (1UL /*<< MPU_RASR_ENABLE_Pos*/)               
#endif
 
 
#define _VAL2FLD(field, value)    (((uint32_t)(value) << field ## _Pos) & field ## _Msk)
 
#define _FLD2VAL(field, value)    (((uint32_t)(value) & field ## _Msk) >> field ## _Pos)
 
/* Memory mapping of Core Hardware */
#define SCS_BASE            (0xE000E000UL)                            
#define SysTick_BASE        (SCS_BASE +  0x0010UL)                    
#define NVIC_BASE           (SCS_BASE +  0x0100UL)                    
#define SCB_BASE            (SCS_BASE +  0x0D00UL)                    
#define SCB                 ((SCB_Type       *)     SCB_BASE      )   
#define SysTick             ((SysTick_Type   *)     SysTick_BASE  )   
#define NVIC                ((NVIC_Type      *)     NVIC_BASE     )   
#if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U)
  #define MPU_BASE          (SCS_BASE +  0x0D90UL)                    
  #define MPU               ((MPU_Type       *)     MPU_BASE      )   
#endif
 
/*******************************************************************************
 *                Hardware Abstraction Layer
  Core Function Interface contains:
  - Core NVIC Functions
  - Core SysTick Functions
  - Core Register Access Functions
 ******************************************************************************/
/* ##########################   NVIC functions  #################################### */
#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)
 
__STATIC_INLINE void __NVIC_EnableIRQ(IRQn_Type IRQn)
{
  if ((int32_t)(IRQn) >= 0)
  {
    NVIC->ISER[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL));
  }
}
 
 
__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);
  }
}
 
 
__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();
  }
}
 
 
__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);
  }
}
 
 
__STATIC_INLINE void __NVIC_SetPendingIRQ(IRQn_Type IRQn)
{
  if ((int32_t)(IRQn) >= 0)
  {
    NVIC->ISPR[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL));
  }
}
 
 
__STATIC_INLINE void __NVIC_ClearPendingIRQ(IRQn_Type IRQn)
{
  if ((int32_t)(IRQn) >= 0)
  {
    NVIC->ICPR[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL));
  }
}
 
 
__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)));
  }
}
 
 
__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)));
  }
}
 
 
__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)))
         );
}
 
 
__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);
}
 
 
__STATIC_INLINE void __NVIC_SetVector(IRQn_Type IRQn, uint32_t vector)
{
#if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
  uint32_t *vectors = (uint32_t *)SCB->VTOR;
#else
    uint32_t *vectors = (uint32_t *)0x0U;
#endif
  vectors[(int32_t)IRQn + NVIC_USER_IRQ_OFFSET] = vector;
}
 
 
__STATIC_INLINE uint32_t __NVIC_GetVector(IRQn_Type IRQn)
{
#if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
  uint32_t *vectors = (uint32_t *)SCB->VTOR;
#else
  uint32_t *vectors = (uint32_t *)0x0U;
#endif
  return vectors[(int32_t)IRQn + NVIC_USER_IRQ_OFFSET];
 
}
 
 
__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();
  }
}
 
/* ##########################  MPU functions  #################################### */
 
#if defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U)
 
#include "mpu_armv7.h"
 
#endif
 
/* ##########################  FPU functions  #################################### */
__STATIC_INLINE uint32_t SCB_GetFPUType(void)
{
    return 0U;           /* No FPU */
}
 
 
/* ##################################    SysTick function  ############################################ */
#if defined (__Vendor_SysTickConfig) && (__Vendor_SysTickConfig == 0U)
 
__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
 
#ifdef __cplusplus
}
#endif
 
#endif /* __CORE_CM0PLUS_H_DEPENDANT */
 
#endif /* __CMSIS_GENERIC */