xref: /nrf52832-nimble/rt-thread/components/CMSIS/Include/core_cm0.h (revision 104654410c56c573564690304ae786df310c91fc)

/**************************************************************************//**
 * @file     core_cm0.h
 * @brief    CMSIS Cortex-M0 Core Peripheral Access Layer Header File
 * @version  V3.20
 * @date     25. February 2013
 *
 * @note
 *
 ******************************************************************************/
/* Copyright (c) 2009 - 2013 ARM LIMITED

   All rights reserved.
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:
   - Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
   - Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
   - Neither the name of ARM nor the names of its contributors may be used
     to endorse or promote products derived from this software without
     specific prior written permission.
   *
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   POSSIBILITY OF SUCH DAMAGE.
   ---------------------------------------------------------------------------*/


#if defined ( __ICCARM__ )
 #pragma system_include  /* treat file as system include file for MISRA check */
#endif

#ifdef __cplusplus
 extern "C" {
#endif

#ifndef __CORE_CM0_H_GENERIC
#define __CORE_CM0_H_GENERIC

/** \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
  @{
 */

/*  CMSIS CM0 definitions */
#define __CM0_CMSIS_VERSION_MAIN  (0x03)                                   /*!< [31:16] CMSIS HAL main version   */
#define __CM0_CMSIS_VERSION_SUB   (0x20)                                   /*!< [15:0]  CMSIS HAL sub version    */
#define __CM0_CMSIS_VERSION       ((__CM0_CMSIS_VERSION_MAIN << 16) | \
                                    __CM0_CMSIS_VERSION_SUB          )     /*!< CMSIS HAL version number         */

#define __CORTEX_M                (0x00)                                   /*!< Cortex-M Core                    */


#if   defined ( __CC_ARM )
  #define __ASM            __asm                                      /*!< asm keyword for ARM Compiler          */
  #define __INLINE         __inline                                   /*!< inline keyword for ARM Compiler       */
  #define __STATIC_INLINE  static __inline

#elif defined ( __ICCARM__ )
  #define __ASM            __asm                                      /*!< asm keyword for IAR Compiler          */
  #define __INLINE         inline                                     /*!< inline keyword for IAR Compiler. Only available in High optimization mode! */
  #define __STATIC_INLINE  static inline

#elif defined ( __GNUC__ )
  #define __ASM            __asm                                      /*!< asm keyword for GNU Compiler          */
  #define __INLINE         inline                                     /*!< inline keyword for GNU Compiler       */
  #define __STATIC_INLINE  static inline

#elif defined ( __TASKING__ )
  #define __ASM            __asm                                      /*!< asm keyword for TASKING Compiler      */
  #define __INLINE         inline                                     /*!< inline keyword for TASKING Compiler   */
  #define __STATIC_INLINE  static inline

#endif

/** __FPU_USED indicates whether an FPU is used or not. This core does not support an FPU at all
*/
#define __FPU_USED       0

#if defined ( __CC_ARM )
  #if defined __TARGET_FPU_VFP
    #warning "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
  #endif

#elif defined ( __ICCARM__ )
  #if defined __ARMVFP__
    #warning "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
  #endif

#elif defined ( __GNUC__ )
  #if defined (__VFP_FP__) && !defined(__SOFTFP__)
    #warning "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
#endif

#include <stdint.h>                      /* standard types definitions                      */
#include <core_cmInstr.h>                /* Core Instruction Access                         */
#include <core_cmFunc.h>                 /* Core Function Access                            */

#endif /* __CORE_CM0_H_GENERIC */

#ifndef __CMSIS_GENERIC

#ifndef __CORE_CM0_H_DEPENDANT
#define __CORE_CM0_H_DEPENDANT

/* check device defines and use defaults */
#if defined __CHECK_DEVICE_DEFINES
  #ifndef __CM0_REV
    #define __CM0_REV               0x0000
    #warning "__CM0_REV not defined in device header file; using default!"
  #endif

  #ifndef __NVIC_PRIO_BITS
    #define __NVIC_PRIO_BITS          2
    #warning "__NVIC_PRIO_BITS not defined in device header file; using default!"
  #endif

  #ifndef __Vendor_SysTickConfig
    #define __Vendor_SysTickConfig    0
    #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              */

/*@} end of group Cortex_M0 */



/*******************************************************************************
 *                 Register Abstraction
  Core Register contain:
  - Core Register
  - Core NVIC Register
  - Core SCB Register
  - Core SysTick 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
  {
#if (__CORTEX_M != 0x04)
    uint32_t _reserved0:27;              /*!< bit:  0..26  Reserved                           */
#else
    uint32_t _reserved0:16;              /*!< bit:  0..15  Reserved                           */
    uint32_t GE:4;                       /*!< bit: 16..19  Greater than or Equal flags        */
    uint32_t _reserved1:7;               /*!< bit: 20..26  Reserved                           */
#endif
    uint32_t Q:1;                        /*!< bit:     27  Saturation condition flag          */
    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;


/** \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;


/** \brief  Union type to access the Special-Purpose Program Status Registers (xPSR).
 */
typedef union
{
  struct
  {
    uint32_t ISR:9;                      /*!< bit:  0.. 8  Exception number                   */
#if (__CORTEX_M != 0x04)
    uint32_t _reserved0:15;              /*!< bit:  9..23  Reserved                           */
#else
    uint32_t _reserved0:7;               /*!< bit:  9..15  Reserved                           */
    uint32_t GE:4;                       /*!< bit: 16..19  Greater than or Equal flags        */
    uint32_t _reserved1:4;               /*!< bit: 20..23  Reserved                           */
#endif
    uint32_t T:1;                        /*!< bit:     24  Thumb bit        (read 0)          */
    uint32_t IT:2;                       /*!< bit: 25..26  saved IT state   (read 0)          */
    uint32_t Q:1;                        /*!< bit:     27  Saturation condition flag          */
    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;


/** \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 FPCA:1;                     /*!< bit:      2  FP extension active flag           */
    uint32_t _reserved0:29;              /*!< bit:  3..31  Reserved                           */
  } b;                                   /*!< Structure used for bit  access                  */
  uint32_t w;                            /*!< Type      used for word access                  */
} CONTROL_Type;

/*@} 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
{
  __IO uint32_t ISER[1];                 /*!< Offset: 0x000 (R/W)  Interrupt Set Enable Register           */
       uint32_t RESERVED0[31];
  __IO uint32_t ICER[1];                 /*!< Offset: 0x080 (R/W)  Interrupt Clear Enable Register          */
       uint32_t RSERVED1[31];
  __IO uint32_t ISPR[1];                 /*!< Offset: 0x100 (R/W)  Interrupt Set Pending Register           */
       uint32_t RESERVED2[31];
  __IO uint32_t ICPR[1];                 /*!< Offset: 0x180 (R/W)  Interrupt Clear Pending Register         */
       uint32_t RESERVED3[31];
       uint32_t RESERVED4[64];
  __IO uint32_t IP[8];                   /*!< 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
{
  __I  uint32_t CPUID;                   /*!< Offset: 0x000 (R/ )  CPUID Base Register                                   */
  __IO uint32_t ICSR;                    /*!< Offset: 0x004 (R/W)  Interrupt Control and State Register                  */
       uint32_t RESERVED0;
  __IO uint32_t AIRCR;                   /*!< Offset: 0x00C (R/W)  Application Interrupt and Reset Control Register      */
  __IO uint32_t SCR;                     /*!< Offset: 0x010 (R/W)  System Control Register                               */
  __IO uint32_t CCR;                     /*!< Offset: 0x014 (R/W)  Configuration Control Register                        */
       uint32_t RESERVED1;
  __IO uint32_t SHP[2];                  /*!< Offset: 0x01C (R/W)  System Handlers Priority Registers. [0] is RESERVED   */
  __IO uint32_t SHCSR;                   /*!< Offset: 0x024 (R/W)  System Handler Control and State Register             */
} SCB_Type;

/* SCB CPUID Register Definitions */
#define SCB_CPUID_IMPLEMENTER_Pos          24                                             /*!< SCB CPUID: IMPLEMENTER Position */
#define SCB_CPUID_IMPLEMENTER_Msk          (0xFFUL << SCB_CPUID_IMPLEMENTER_Pos)          /*!< SCB CPUID: IMPLEMENTER Mask */

#define SCB_CPUID_VARIANT_Pos              20                                             /*!< SCB CPUID: VARIANT Position */
#define SCB_CPUID_VARIANT_Msk              (0xFUL << SCB_CPUID_VARIANT_Pos)               /*!< SCB CPUID: VARIANT Mask */

#define SCB_CPUID_ARCHITECTURE_Pos         16                                             /*!< SCB CPUID: ARCHITECTURE Position */
#define SCB_CPUID_ARCHITECTURE_Msk         (0xFUL << SCB_CPUID_ARCHITECTURE_Pos)          /*!< SCB CPUID: ARCHITECTURE Mask */

#define SCB_CPUID_PARTNO_Pos                4                                             /*!< SCB CPUID: PARTNO Position */
#define SCB_CPUID_PARTNO_Msk               (0xFFFUL << SCB_CPUID_PARTNO_Pos)              /*!< SCB CPUID: PARTNO Mask */

#define SCB_CPUID_REVISION_Pos              0                                             /*!< 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            31                                             /*!< SCB ICSR: NMIPENDSET Position */
#define SCB_ICSR_NMIPENDSET_Msk            (1UL << SCB_ICSR_NMIPENDSET_Pos)               /*!< SCB ICSR: NMIPENDSET Mask */

#define SCB_ICSR_PENDSVSET_Pos             28                                             /*!< SCB ICSR: PENDSVSET Position */
#define SCB_ICSR_PENDSVSET_Msk             (1UL << SCB_ICSR_PENDSVSET_Pos)                /*!< SCB ICSR: PENDSVSET Mask */

#define SCB_ICSR_PENDSVCLR_Pos             27                                             /*!< SCB ICSR: PENDSVCLR Position */
#define SCB_ICSR_PENDSVCLR_Msk             (1UL << SCB_ICSR_PENDSVCLR_Pos)                /*!< SCB ICSR: PENDSVCLR Mask */

#define SCB_ICSR_PENDSTSET_Pos             26                                             /*!< SCB ICSR: PENDSTSET Position */
#define SCB_ICSR_PENDSTSET_Msk             (1UL << SCB_ICSR_PENDSTSET_Pos)                /*!< SCB ICSR: PENDSTSET Mask */

#define SCB_ICSR_PENDSTCLR_Pos             25                                             /*!< SCB ICSR: PENDSTCLR Position */
#define SCB_ICSR_PENDSTCLR_Msk             (1UL << SCB_ICSR_PENDSTCLR_Pos)                /*!< SCB ICSR: PENDSTCLR Mask */

#define SCB_ICSR_ISRPREEMPT_Pos            23                                             /*!< SCB ICSR: ISRPREEMPT Position */
#define SCB_ICSR_ISRPREEMPT_Msk            (1UL << SCB_ICSR_ISRPREEMPT_Pos)               /*!< SCB ICSR: ISRPREEMPT Mask */

#define SCB_ICSR_ISRPENDING_Pos            22                                             /*!< SCB ICSR: ISRPENDING Position */
#define SCB_ICSR_ISRPENDING_Msk            (1UL << SCB_ICSR_ISRPENDING_Pos)               /*!< SCB ICSR: ISRPENDING Mask */

#define SCB_ICSR_VECTPENDING_Pos           12                                             /*!< SCB ICSR: VECTPENDING Position */
#define SCB_ICSR_VECTPENDING_Msk           (0x1FFUL << SCB_ICSR_VECTPENDING_Pos)          /*!< SCB ICSR: VECTPENDING Mask */

#define SCB_ICSR_VECTACTIVE_Pos             0                                             /*!< SCB ICSR: VECTACTIVE Position */
#define SCB_ICSR_VECTACTIVE_Msk            (0x1FFUL << SCB_ICSR_VECTACTIVE_Pos)           /*!< SCB ICSR: VECTACTIVE Mask */

/* SCB Application Interrupt and Reset Control Register Definitions */
#define SCB_AIRCR_VECTKEY_Pos              16                                             /*!< SCB AIRCR: VECTKEY Position */
#define SCB_AIRCR_VECTKEY_Msk              (0xFFFFUL << SCB_AIRCR_VECTKEY_Pos)            /*!< SCB AIRCR: VECTKEY Mask */

#define SCB_AIRCR_VECTKEYSTAT_Pos          16                                             /*!< SCB AIRCR: VECTKEYSTAT Position */
#define SCB_AIRCR_VECTKEYSTAT_Msk          (0xFFFFUL << SCB_AIRCR_VECTKEYSTAT_Pos)        /*!< SCB AIRCR: VECTKEYSTAT Mask */

#define SCB_AIRCR_ENDIANESS_Pos            15                                             /*!< SCB AIRCR: ENDIANESS Position */
#define SCB_AIRCR_ENDIANESS_Msk            (1UL << SCB_AIRCR_ENDIANESS_Pos)               /*!< SCB AIRCR: ENDIANESS Mask */

#define SCB_AIRCR_SYSRESETREQ_Pos           2                                             /*!< SCB AIRCR: SYSRESETREQ Position */
#define SCB_AIRCR_SYSRESETREQ_Msk          (1UL << SCB_AIRCR_SYSRESETREQ_Pos)             /*!< SCB AIRCR: SYSRESETREQ Mask */

#define SCB_AIRCR_VECTCLRACTIVE_Pos         1                                             /*!< 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               4                                             /*!< SCB SCR: SEVONPEND Position */
#define SCB_SCR_SEVONPEND_Msk              (1UL << SCB_SCR_SEVONPEND_Pos)                 /*!< SCB SCR: SEVONPEND Mask */

#define SCB_SCR_SLEEPDEEP_Pos               2                                             /*!< SCB SCR: SLEEPDEEP Position */
#define SCB_SCR_SLEEPDEEP_Msk              (1UL << SCB_SCR_SLEEPDEEP_Pos)                 /*!< SCB SCR: SLEEPDEEP Mask */

#define SCB_SCR_SLEEPONEXIT_Pos             1                                             /*!< 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                9                                             /*!< SCB CCR: STKALIGN Position */
#define SCB_CCR_STKALIGN_Msk               (1UL << SCB_CCR_STKALIGN_Pos)                  /*!< SCB CCR: STKALIGN Mask */

#define SCB_CCR_UNALIGN_TRP_Pos             3                                             /*!< 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         15                                             /*!< 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
{
  __IO uint32_t CTRL;                    /*!< Offset: 0x000 (R/W)  SysTick Control and Status Register */
  __IO uint32_t LOAD;                    /*!< Offset: 0x004 (R/W)  SysTick Reload Value Register       */
  __IO uint32_t VAL;                     /*!< Offset: 0x008 (R/W)  SysTick Current Value Register      */
  __I  uint32_t CALIB;                   /*!< Offset: 0x00C (R/ )  SysTick Calibration Register        */
} SysTick_Type;

/* SysTick Control / Status Register Definitions */
#define SysTick_CTRL_COUNTFLAG_Pos         16                                             /*!< SysTick CTRL: COUNTFLAG Position */
#define SysTick_CTRL_COUNTFLAG_Msk         (1UL << SysTick_CTRL_COUNTFLAG_Pos)            /*!< SysTick CTRL: COUNTFLAG Mask */

#define SysTick_CTRL_CLKSOURCE_Pos          2                                             /*!< SysTick CTRL: CLKSOURCE Position */
#define SysTick_CTRL_CLKSOURCE_Msk         (1UL << SysTick_CTRL_CLKSOURCE_Pos)            /*!< SysTick CTRL: CLKSOURCE Mask */

#define SysTick_CTRL_TICKINT_Pos            1                                             /*!< SysTick CTRL: TICKINT Position */
#define SysTick_CTRL_TICKINT_Msk           (1UL << SysTick_CTRL_TICKINT_Pos)              /*!< SysTick CTRL: TICKINT Mask */

#define SysTick_CTRL_ENABLE_Pos             0                                             /*!< 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             0                                             /*!< 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             0                                             /*!< 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            31                                             /*!< SysTick CALIB: NOREF Position */
#define SysTick_CALIB_NOREF_Msk            (1UL << SysTick_CALIB_NOREF_Pos)               /*!< SysTick CALIB: NOREF Mask */

#define SysTick_CALIB_SKEW_Pos             30                                             /*!< SysTick CALIB: SKEW Position */
#define SysTick_CALIB_SKEW_Msk             (1UL << SysTick_CALIB_SKEW_Pos)                /*!< SysTick CALIB: SKEW Mask */

#define SysTick_CALIB_TENMS_Pos             0                                             /*!< SysTick CALIB: TENMS Position */
#define SysTick_CALIB_TENMS_Msk            (0xFFFFFFUL << SysTick_VAL_CURRENT_Pos)        /*!< SysTick CALIB: TENMS Mask */

/*@} end of group CMSIS_SysTick */


/** \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_base     Core Definitions
    \brief      Definitions for base addresses, unions, and structures.
  @{
 */

/* Memory mapping of Cortex-M0 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          */


/*@} */



/*******************************************************************************
 *                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.
    @{
 */

/* Interrupt Priorities are WORD accessible only under ARMv6M                   */
/* The following MACROS handle generation of the register offset and byte masks */
#define _BIT_SHIFT(IRQn)         (  (((uint32_t)(IRQn)       )    &  0x03) * 8 )
#define _SHP_IDX(IRQn)           ( ((((uint32_t)(IRQn) & 0x0F)-8) >>    2)     )
#define _IP_IDX(IRQn)            (   ((uint32_t)(IRQn)            >>    2)     )


/** \brief  Enable External Interrupt

    The function enables a device-specific interrupt in the NVIC interrupt controller.

    \param [in]      IRQn  External interrupt number. Value cannot be negative.
 */
__STATIC_INLINE void NVIC_EnableIRQ(IRQn_Type IRQn)
{
  NVIC->ISER[0] = (1 << ((uint32_t)(IRQn) & 0x1F));
}


/** \brief  Disable External Interrupt

    The function disables a device-specific interrupt in the NVIC interrupt controller.

    \param [in]      IRQn  External interrupt number. Value cannot be negative.
 */
__STATIC_INLINE void NVIC_DisableIRQ(IRQn_Type IRQn)
{
  NVIC->ICER[0] = (1 << ((uint32_t)(IRQn) & 0x1F));
}


/** \brief  Get Pending Interrupt

    The function reads the pending register in the NVIC and returns the pending bit
    for the specified interrupt.

    \param [in]      IRQn  Interrupt number.

    \return             0  Interrupt status is not pending.
    \return             1  Interrupt status is pending.
 */
__STATIC_INLINE uint32_t NVIC_GetPendingIRQ(IRQn_Type IRQn)
{
  return((uint32_t) ((NVIC->ISPR[0] & (1 << ((uint32_t)(IRQn) & 0x1F)))?1:0));
}


/** \brief  Set Pending Interrupt

    The function sets the pending bit of an external interrupt.

    \param [in]      IRQn  Interrupt number. Value cannot be negative.
 */
__STATIC_INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn)
{
  NVIC->ISPR[0] = (1 << ((uint32_t)(IRQn) & 0x1F));
}


/** \brief  Clear Pending Interrupt

    The function clears the pending bit of an external interrupt.

    \param [in]      IRQn  External interrupt number. Value cannot be negative.
 */
__STATIC_INLINE void NVIC_ClearPendingIRQ(IRQn_Type IRQn)
{
  NVIC->ICPR[0] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* Clear pending interrupt */
}


/** \brief  Set Interrupt Priority

    The function sets the priority of an interrupt.

    \note The priority cannot be set for every core interrupt.

    \param [in]      IRQn  Interrupt number.
    \param [in]  priority  Priority to set.
 */
__STATIC_INLINE void NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority)
{
  if(IRQn < 0) {
    SCB->SHP[_SHP_IDX(IRQn)] = (SCB->SHP[_SHP_IDX(IRQn)] & ~(0xFF << _BIT_SHIFT(IRQn))) |
        (((priority << (8 - __NVIC_PRIO_BITS)) & 0xFF) << _BIT_SHIFT(IRQn)); }
  else {
    NVIC->IP[_IP_IDX(IRQn)] = (NVIC->IP[_IP_IDX(IRQn)] & ~(0xFF << _BIT_SHIFT(IRQn))) |
        (((priority << (8 - __NVIC_PRIO_BITS)) & 0xFF) << _BIT_SHIFT(IRQn)); }
}


/** \brief  Get Interrupt Priority

    The function reads the priority of an interrupt. The interrupt
    number can be positive to specify an external (device specific)
    interrupt, or negative to specify an internal (core) interrupt.


    \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(IRQn < 0) {
    return((uint32_t)(((SCB->SHP[_SHP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) & 0xFF) >> (8 - __NVIC_PRIO_BITS)));  } /* get priority for Cortex-M0 system interrupts */
  else {
    return((uint32_t)(((NVIC->IP[ _IP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) & 0xFF) >> (8 - __NVIC_PRIO_BITS)));  } /* get priority for device specific interrupts  */
}


/** \brief  System Reset

    The function initiates a system reset request to reset the MCU.
 */
__STATIC_INLINE void NVIC_SystemReset(void)
{
  __DSB();                                                     /* Ensure all outstanding memory accesses included
                                                                  buffered write are completed before reset */
  SCB->AIRCR  = ((0x5FA << SCB_AIRCR_VECTKEY_Pos)      |
                 SCB_AIRCR_SYSRESETREQ_Msk);
  __DSB();                                                     /* Ensure completion of memory access */
  while(1);                                                    /* wait until reset */
}

/*@} end of CMSIS_Core_NVICFunctions */



/* ##################################    SysTick function  ############################################ */
/** \ingroup  CMSIS_Core_FunctionInterface
    \defgroup CMSIS_Core_SysTickFunctions SysTick Functions
    \brief      Functions that configure the System.
  @{
 */

#if (__Vendor_SysTickConfig == 0)

/** \brief  System Tick Configuration

    The function 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 - 1) > SysTick_LOAD_RELOAD_Msk)  return (1);      /* Reload value impossible */

  SysTick->LOAD  = ticks - 1;                                  /* set reload register */
  NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1);  /* set Priority for Systick Interrupt */
  SysTick->VAL   = 0;                                          /* 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 (0);                                                  /* Function successful */
}

#endif

/*@} end of CMSIS_Core_SysTickFunctions */




#endif /* __CORE_CM0_H_DEPENDANT */

#endif /* __CMSIS_GENERIC */

#ifdef __cplusplus
}
#endif