666 lines
30 KiB
C
666 lines
30 KiB
C
/**************************************************************************//**
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* @file core_cm0.h
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* @brief CMSIS Cortex-M0 Core Peripheral Access Layer Header File
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* @version V2.10
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* @date 19. July 2011
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*
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* @note
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* Copyright (C) 2009-2011 ARM Limited. All rights reserved.
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*
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* @par
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* ARM Limited (ARM) is supplying this software for use with Cortex-M
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* processor based microcontrollers. This file can be freely distributed
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* within development tools that are supporting such ARM based processors.
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*
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* @par
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
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* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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******************************************************************************/
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#if defined ( __ICCARM__ )
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#pragma system_include /* treat file as system include file for MISRA check */
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef __CORE_CM0_H_GENERIC
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#define __CORE_CM0_H_GENERIC
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/** \mainpage CMSIS Cortex-M0
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This documentation describes the CMSIS Cortex-M Core Peripheral Access Layer.
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It consists of:
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- Cortex-M Core Register Definitions
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- Cortex-M functions
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- Cortex-M instructions
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The CMSIS Cortex-M0 Core Peripheral Access Layer contains C and assembly functions that ease
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access to the Cortex-M Core
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*/
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/** \defgroup CMSIS_MISRA_Exceptions CMSIS MISRA-C:2004 Compliance Exceptions
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CMSIS violates following MISRA-C2004 Rules:
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- Violates MISRA 2004 Required Rule 8.5, object/function definition in header file.<br>
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Function definitions in header files are used to allow 'inlining'.
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- Violates MISRA 2004 Required Rule 18.4, declaration of union type or object of union type: '{...}'.<br>
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Unions are used for effective representation of core registers.
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- Violates MISRA 2004 Advisory Rule 19.7, Function-like macro defined.<br>
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Function-like macros are used to allow more efficient code.
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*/
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/*******************************************************************************
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* CMSIS definitions
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******************************************************************************/
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/** \defgroup CMSIS_core_definitions CMSIS Core Definitions
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This file defines all structures and symbols for CMSIS core:
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- CMSIS version number
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- Cortex-M core
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- Cortex-M core Revision Number
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@{
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*/
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/* CMSIS CM0 definitions */
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#define __CM0_CMSIS_VERSION_MAIN (0x02) /*!< [31:16] CMSIS HAL main version */
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#define __CM0_CMSIS_VERSION_SUB (0x10) /*!< [15:0] CMSIS HAL sub version */
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#define __CM0_CMSIS_VERSION ((__CM0_CMSIS_VERSION_MAIN << 16) | __CM0_CMSIS_VERSION_SUB) /*!< CMSIS HAL version number */
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#define __CORTEX_M (0x00) /*!< Cortex core */
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#if defined ( __CC_ARM )
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#define __ASM __asm /*!< asm keyword for ARM Compiler */
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#define __INLINE __inline /*!< inline keyword for ARM Compiler */
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#elif defined ( __ICCARM__ )
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#define __ASM __asm /*!< asm keyword for IAR Compiler */
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#define __INLINE inline /*!< inline keyword for IAR Compiler. Only available in High optimization mode! */
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#elif defined ( __GNUC__ )
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#define __ASM __asm /*!< asm keyword for GNU Compiler */
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#define __INLINE inline /*!< inline keyword for GNU Compiler */
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#elif defined ( __TASKING__ )
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#define __ASM __asm /*!< asm keyword for TASKING Compiler */
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#define __INLINE inline /*!< inline keyword for TASKING Compiler */
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#endif
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/*!< __FPU_USED to be checked prior to making use of FPU specific registers and functions */
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#define __FPU_USED 0
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#if defined ( __CC_ARM )
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#if defined __TARGET_FPU_VFP
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#warning "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
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#endif
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#elif defined ( __ICCARM__ )
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#if defined __ARMVFP__
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#warning "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
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#endif
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#elif defined ( __GNUC__ )
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#if defined (__VFP_FP__) && !defined(__SOFTFP__)
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#warning "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"
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#endif
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#elif defined ( __TASKING__ )
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/* add preprocessor checks */
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#endif
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#include <stdint.h> /*!< standard types definitions */
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#include "core_cmInstr.h" /*!< Core Instruction Access */
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#include "core_cmFunc.h" /*!< Core Function Access */
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#endif /* __CORE_CM0_H_GENERIC */
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#ifndef __CMSIS_GENERIC
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#ifndef __CORE_CM0_H_DEPENDANT
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#define __CORE_CM0_H_DEPENDANT
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/* check device defines and use defaults */
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#if defined __CHECK_DEVICE_DEFINES
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#ifndef __CM0_REV
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#define __CM0_REV 0x0000
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#warning "__CM0_REV not defined in device header file; using default!"
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#endif
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#ifndef __NVIC_PRIO_BITS
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#define __NVIC_PRIO_BITS 2
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#warning "__NVIC_PRIO_BITS not defined in device header file; using default!"
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#endif
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#ifndef __Vendor_SysTickConfig
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#define __Vendor_SysTickConfig 0
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#warning "__Vendor_SysTickConfig not defined in device header file; using default!"
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#endif
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#endif
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/* IO definitions (access restrictions to peripheral registers) */
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#ifdef __cplusplus
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#define __I volatile /*!< defines 'read only' permissions */
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#else
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#define __I volatile const /*!< defines 'read only' permissions */
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#endif
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#define __O volatile /*!< defines 'write only' permissions */
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#define __IO volatile /*!< defines 'read / write' permissions */
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/*@} end of group CMSIS_core_definitions */
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/*******************************************************************************
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* Register Abstraction
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******************************************************************************/
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/** \defgroup CMSIS_core_register CMSIS Core Register
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Core Register contain:
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- Core Register
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- Core NVIC Register
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- Core SCB Register
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- Core SysTick Register
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*/
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/** \ingroup CMSIS_core_register
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\defgroup CMSIS_CORE CMSIS Core
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Type definitions for the Cortex-M Core Registers
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@{
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*/
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/** \brief Union type to access the Application Program Status Register (APSR).
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*/
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typedef union
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{
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struct
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{
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#if (__CORTEX_M != 0x04)
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uint32_t _reserved0:27; /*!< bit: 0..26 Reserved */
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#else
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uint32_t _reserved0:16; /*!< bit: 0..15 Reserved */
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uint32_t GE:4; /*!< bit: 16..19 Greater than or Equal flags */
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uint32_t _reserved1:7; /*!< bit: 20..26 Reserved */
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#endif
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uint32_t Q:1; /*!< bit: 27 Saturation condition flag */
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uint32_t V:1; /*!< bit: 28 Overflow condition code flag */
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uint32_t C:1; /*!< bit: 29 Carry condition code flag */
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uint32_t Z:1; /*!< bit: 30 Zero condition code flag */
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uint32_t N:1; /*!< bit: 31 Negative condition code flag */
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} b; /*!< Structure used for bit access */
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uint32_t w; /*!< Type used for word access */
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} APSR_Type;
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/** \brief Union type to access the Interrupt Program Status Register (IPSR).
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*/
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typedef union
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{
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struct
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{
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uint32_t ISR:9; /*!< bit: 0.. 8 Exception number */
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uint32_t _reserved0:23; /*!< bit: 9..31 Reserved */
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} b; /*!< Structure used for bit access */
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uint32_t w; /*!< Type used for word access */
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} IPSR_Type;
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/** \brief Union type to access the Special-Purpose Program Status Registers (xPSR).
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*/
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typedef union
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{
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struct
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{
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uint32_t ISR:9; /*!< bit: 0.. 8 Exception number */
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#if (__CORTEX_M != 0x04)
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uint32_t _reserved0:15; /*!< bit: 9..23 Reserved */
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#else
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uint32_t _reserved0:7; /*!< bit: 9..15 Reserved */
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uint32_t GE:4; /*!< bit: 16..19 Greater than or Equal flags */
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uint32_t _reserved1:4; /*!< bit: 20..23 Reserved */
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#endif
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uint32_t T:1; /*!< bit: 24 Thumb bit (read 0) */
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uint32_t IT:2; /*!< bit: 25..26 saved IT state (read 0) */
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uint32_t Q:1; /*!< bit: 27 Saturation condition flag */
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uint32_t V:1; /*!< bit: 28 Overflow condition code flag */
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uint32_t C:1; /*!< bit: 29 Carry condition code flag */
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uint32_t Z:1; /*!< bit: 30 Zero condition code flag */
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uint32_t N:1; /*!< bit: 31 Negative condition code flag */
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} b; /*!< Structure used for bit access */
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uint32_t w; /*!< Type used for word access */
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} xPSR_Type;
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/** \brief Union type to access the Control Registers (CONTROL).
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*/
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typedef union
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{
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struct
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{
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uint32_t nPRIV:1; /*!< bit: 0 Execution privilege in Thread mode */
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uint32_t SPSEL:1; /*!< bit: 1 Stack to be used */
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uint32_t FPCA:1; /*!< bit: 2 FP extension active flag */
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uint32_t _reserved0:29; /*!< bit: 3..31 Reserved */
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} b; /*!< Structure used for bit access */
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uint32_t w; /*!< Type used for word access */
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} CONTROL_Type;
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/*@} end of group CMSIS_CORE */
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/** \ingroup CMSIS_core_register
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\defgroup CMSIS_NVIC CMSIS NVIC
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Type definitions for the Cortex-M NVIC Registers
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@{
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*/
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/** \brief Structure type to access the Nested Vectored Interrupt Controller (NVIC).
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*/
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typedef struct
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{
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__IO uint32_t ISER[1]; /*!< Offset: 0x000 (R/W) Interrupt Set Enable Register */
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uint32_t RESERVED0[31];
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__IO uint32_t ICER[1]; /*!< Offset: 0x080 (R/W) Interrupt Clear Enable Register */
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uint32_t RSERVED1[31];
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__IO uint32_t ISPR[1]; /*!< Offset: 0x100 (R/W) Interrupt Set Pending Register */
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uint32_t RESERVED2[31];
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__IO uint32_t ICPR[1]; /*!< Offset: 0x180 (R/W) Interrupt Clear Pending Register */
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uint32_t RESERVED3[31];
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uint32_t RESERVED4[64];
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__IO uint32_t IP[8]; /*!< Offset: 0x300 (R/W) Interrupt Priority Register */
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} NVIC_Type;
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/*@} end of group CMSIS_NVIC */
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/** \ingroup CMSIS_core_register
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\defgroup CMSIS_SCB CMSIS SCB
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Type definitions for the Cortex-M System Control Block Registers
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@{
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*/
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/** \brief Structure type to access the System Control Block (SCB).
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*/
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typedef struct
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{
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__I uint32_t CPUID; /*!< Offset: 0x000 (R/ ) CPUID Base Register */
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__IO uint32_t ICSR; /*!< Offset: 0x004 (R/W) Interrupt Control and State Register */
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uint32_t RESERVED0;
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__IO uint32_t AIRCR; /*!< Offset: 0x00C (R/W) Application Interrupt and Reset Control Register */
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__IO uint32_t SCR; /*!< Offset: 0x010 (R/W) System Control Register */
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__IO uint32_t CCR; /*!< Offset: 0x014 (R/W) Configuration Control Register */
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uint32_t RESERVED1;
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__IO uint32_t SHP[2]; /*!< Offset: 0x01C (R/W) System Handlers Priority Registers. [0] is RESERVED */
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__IO uint32_t SHCSR; /*!< Offset: 0x024 (R/W) System Handler Control and State Register */
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} SCB_Type;
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/* SCB CPUID Register Definitions */
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#define SCB_CPUID_IMPLEMENTER_Pos 24 /*!< SCB CPUID: IMPLEMENTER Position */
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#define SCB_CPUID_IMPLEMENTER_Msk (0xFFUL << SCB_CPUID_IMPLEMENTER_Pos) /*!< SCB CPUID: IMPLEMENTER Mask */
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#define SCB_CPUID_VARIANT_Pos 20 /*!< SCB CPUID: VARIANT Position */
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#define SCB_CPUID_VARIANT_Msk (0xFUL << SCB_CPUID_VARIANT_Pos) /*!< SCB CPUID: VARIANT Mask */
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#define SCB_CPUID_ARCHITECTURE_Pos 16 /*!< SCB CPUID: ARCHITECTURE Position */
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#define SCB_CPUID_ARCHITECTURE_Msk (0xFUL << SCB_CPUID_ARCHITECTURE_Pos) /*!< SCB CPUID: ARCHITECTURE Mask */
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#define SCB_CPUID_PARTNO_Pos 4 /*!< SCB CPUID: PARTNO Position */
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#define SCB_CPUID_PARTNO_Msk (0xFFFUL << SCB_CPUID_PARTNO_Pos) /*!< SCB CPUID: PARTNO Mask */
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#define SCB_CPUID_REVISION_Pos 0 /*!< SCB CPUID: REVISION Position */
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#define SCB_CPUID_REVISION_Msk (0xFUL << SCB_CPUID_REVISION_Pos) /*!< SCB CPUID: REVISION Mask */
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/* SCB Interrupt Control State Register Definitions */
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#define SCB_ICSR_NMIPENDSET_Pos 31 /*!< SCB ICSR: NMIPENDSET Position */
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#define SCB_ICSR_NMIPENDSET_Msk (1UL << SCB_ICSR_NMIPENDSET_Pos) /*!< SCB ICSR: NMIPENDSET Mask */
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#define SCB_ICSR_PENDSVSET_Pos 28 /*!< SCB ICSR: PENDSVSET Position */
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#define SCB_ICSR_PENDSVSET_Msk (1UL << SCB_ICSR_PENDSVSET_Pos) /*!< SCB ICSR: PENDSVSET Mask */
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#define SCB_ICSR_PENDSVCLR_Pos 27 /*!< SCB ICSR: PENDSVCLR Position */
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#define SCB_ICSR_PENDSVCLR_Msk (1UL << SCB_ICSR_PENDSVCLR_Pos) /*!< SCB ICSR: PENDSVCLR Mask */
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#define SCB_ICSR_PENDSTSET_Pos 26 /*!< SCB ICSR: PENDSTSET Position */
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#define SCB_ICSR_PENDSTSET_Msk (1UL << SCB_ICSR_PENDSTSET_Pos) /*!< SCB ICSR: PENDSTSET Mask */
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#define SCB_ICSR_PENDSTCLR_Pos 25 /*!< SCB ICSR: PENDSTCLR Position */
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#define SCB_ICSR_PENDSTCLR_Msk (1UL << SCB_ICSR_PENDSTCLR_Pos) /*!< SCB ICSR: PENDSTCLR Mask */
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#define SCB_ICSR_ISRPREEMPT_Pos 23 /*!< SCB ICSR: ISRPREEMPT Position */
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#define SCB_ICSR_ISRPREEMPT_Msk (1UL << SCB_ICSR_ISRPREEMPT_Pos) /*!< SCB ICSR: ISRPREEMPT Mask */
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#define SCB_ICSR_ISRPENDING_Pos 22 /*!< SCB ICSR: ISRPENDING Position */
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#define SCB_ICSR_ISRPENDING_Msk (1UL << SCB_ICSR_ISRPENDING_Pos) /*!< SCB ICSR: ISRPENDING Mask */
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#define SCB_ICSR_VECTPENDING_Pos 12 /*!< SCB ICSR: VECTPENDING Position */
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#define SCB_ICSR_VECTPENDING_Msk (0x1FFUL << SCB_ICSR_VECTPENDING_Pos) /*!< SCB ICSR: VECTPENDING Mask */
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#define SCB_ICSR_VECTACTIVE_Pos 0 /*!< SCB ICSR: VECTACTIVE Position */
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#define SCB_ICSR_VECTACTIVE_Msk (0x1FFUL << SCB_ICSR_VECTACTIVE_Pos) /*!< SCB ICSR: VECTACTIVE Mask */
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/* SCB Application Interrupt and Reset Control Register Definitions */
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#define SCB_AIRCR_VECTKEY_Pos 16 /*!< SCB AIRCR: VECTKEY Position */
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#define SCB_AIRCR_VECTKEY_Msk (0xFFFFUL << SCB_AIRCR_VECTKEY_Pos) /*!< SCB AIRCR: VECTKEY Mask */
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#define SCB_AIRCR_VECTKEYSTAT_Pos 16 /*!< SCB AIRCR: VECTKEYSTAT Position */
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#define SCB_AIRCR_VECTKEYSTAT_Msk (0xFFFFUL << SCB_AIRCR_VECTKEYSTAT_Pos) /*!< SCB AIRCR: VECTKEYSTAT Mask */
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#define SCB_AIRCR_ENDIANESS_Pos 15 /*!< SCB AIRCR: ENDIANESS Position */
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#define SCB_AIRCR_ENDIANESS_Msk (1UL << SCB_AIRCR_ENDIANESS_Pos) /*!< SCB AIRCR: ENDIANESS Mask */
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#define SCB_AIRCR_SYSRESETREQ_Pos 2 /*!< SCB AIRCR: SYSRESETREQ Position */
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#define SCB_AIRCR_SYSRESETREQ_Msk (1UL << SCB_AIRCR_SYSRESETREQ_Pos) /*!< SCB AIRCR: SYSRESETREQ Mask */
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#define SCB_AIRCR_VECTCLRACTIVE_Pos 1 /*!< SCB AIRCR: VECTCLRACTIVE Position */
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#define SCB_AIRCR_VECTCLRACTIVE_Msk (1UL << SCB_AIRCR_VECTCLRACTIVE_Pos) /*!< SCB AIRCR: VECTCLRACTIVE Mask */
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/* SCB System Control Register Definitions */
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#define SCB_SCR_SEVONPEND_Pos 4 /*!< SCB SCR: SEVONPEND Position */
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#define SCB_SCR_SEVONPEND_Msk (1UL << SCB_SCR_SEVONPEND_Pos) /*!< SCB SCR: SEVONPEND Mask */
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#define SCB_SCR_SLEEPDEEP_Pos 2 /*!< SCB SCR: SLEEPDEEP Position */
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#define SCB_SCR_SLEEPDEEP_Msk (1UL << SCB_SCR_SLEEPDEEP_Pos) /*!< SCB SCR: SLEEPDEEP Mask */
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#define SCB_SCR_SLEEPONEXIT_Pos 1 /*!< SCB SCR: SLEEPONEXIT Position */
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#define SCB_SCR_SLEEPONEXIT_Msk (1UL << SCB_SCR_SLEEPONEXIT_Pos) /*!< SCB SCR: SLEEPONEXIT Mask */
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/* SCB Configuration Control Register Definitions */
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#define SCB_CCR_STKALIGN_Pos 9 /*!< SCB CCR: STKALIGN Position */
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#define SCB_CCR_STKALIGN_Msk (1UL << SCB_CCR_STKALIGN_Pos) /*!< SCB CCR: STKALIGN Mask */
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#define SCB_CCR_UNALIGN_TRP_Pos 3 /*!< SCB CCR: UNALIGN_TRP Position */
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#define SCB_CCR_UNALIGN_TRP_Msk (1UL << SCB_CCR_UNALIGN_TRP_Pos) /*!< SCB CCR: UNALIGN_TRP Mask */
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/* SCB System Handler Control and State Register Definitions */
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#define SCB_SHCSR_SVCALLPENDED_Pos 15 /*!< SCB SHCSR: SVCALLPENDED Position */
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#define SCB_SHCSR_SVCALLPENDED_Msk (1UL << SCB_SHCSR_SVCALLPENDED_Pos) /*!< SCB SHCSR: SVCALLPENDED Mask */
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/*@} end of group CMSIS_SCB */
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/** \ingroup CMSIS_core_register
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\defgroup CMSIS_SysTick CMSIS SysTick
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Type definitions for the Cortex-M System Timer Registers
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@{
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*/
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/** \brief Structure type to access the System Timer (SysTick).
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*/
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typedef struct
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{
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__IO uint32_t CTRL; /*!< Offset: 0x000 (R/W) SysTick Control and Status Register */
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__IO uint32_t LOAD; /*!< Offset: 0x004 (R/W) SysTick Reload Value Register */
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__IO uint32_t VAL; /*!< Offset: 0x008 (R/W) SysTick Current Value Register */
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__I uint32_t CALIB; /*!< Offset: 0x00C (R/ ) SysTick Calibration Register */
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} SysTick_Type;
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/* SysTick Control / Status Register Definitions */
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#define SysTick_CTRL_COUNTFLAG_Pos 16 /*!< SysTick CTRL: COUNTFLAG Position */
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#define SysTick_CTRL_COUNTFLAG_Msk (1UL << SysTick_CTRL_COUNTFLAG_Pos) /*!< SysTick CTRL: COUNTFLAG Mask */
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#define SysTick_CTRL_CLKSOURCE_Pos 2 /*!< SysTick CTRL: CLKSOURCE Position */
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#define SysTick_CTRL_CLKSOURCE_Msk (1UL << SysTick_CTRL_CLKSOURCE_Pos) /*!< SysTick CTRL: CLKSOURCE Mask */
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#define SysTick_CTRL_TICKINT_Pos 1 /*!< SysTick CTRL: TICKINT Position */
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#define SysTick_CTRL_TICKINT_Msk (1UL << SysTick_CTRL_TICKINT_Pos) /*!< SysTick CTRL: TICKINT Mask */
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#define SysTick_CTRL_ENABLE_Pos 0 /*!< SysTick CTRL: ENABLE Position */
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#define SysTick_CTRL_ENABLE_Msk (1UL << SysTick_CTRL_ENABLE_Pos) /*!< SysTick CTRL: ENABLE Mask */
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/* SysTick Reload Register Definitions */
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#define SysTick_LOAD_RELOAD_Pos 0 /*!< SysTick LOAD: RELOAD Position */
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#define SysTick_LOAD_RELOAD_Msk (0xFFFFFFUL << SysTick_LOAD_RELOAD_Pos) /*!< SysTick LOAD: RELOAD Mask */
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/* SysTick Current Register Definitions */
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#define SysTick_VAL_CURRENT_Pos 0 /*!< SysTick VAL: CURRENT Position */
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#define SysTick_VAL_CURRENT_Msk (0xFFFFFFUL << SysTick_VAL_CURRENT_Pos) /*!< SysTick VAL: CURRENT Mask */
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/* SysTick Calibration Register Definitions */
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#define SysTick_CALIB_NOREF_Pos 31 /*!< SysTick CALIB: NOREF Position */
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#define SysTick_CALIB_NOREF_Msk (1UL << SysTick_CALIB_NOREF_Pos) /*!< SysTick CALIB: NOREF Mask */
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#define SysTick_CALIB_SKEW_Pos 30 /*!< SysTick CALIB: SKEW Position */
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#define SysTick_CALIB_SKEW_Msk (1UL << SysTick_CALIB_SKEW_Pos) /*!< SysTick CALIB: SKEW Mask */
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#define SysTick_CALIB_TENMS_Pos 0 /*!< SysTick CALIB: TENMS Position */
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#define SysTick_CALIB_TENMS_Msk (0xFFFFFFUL << SysTick_VAL_CURRENT_Pos) /*!< SysTick CALIB: TENMS Mask */
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/*@} end of group CMSIS_SysTick */
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/** \ingroup CMSIS_core_register
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\defgroup CMSIS_CoreDebug CMSIS Core Debug
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Cortex-M0 Core Debug Registers (DCB registers, SHCSR, and DFSR) are only accessible over DAP
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and not via processor. Therefore they are not covered by the Cortex-M0 header file.
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@{
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|
*/
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/*@} end of group CMSIS_CoreDebug */
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/** \ingroup CMSIS_core_register
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@{
|
|
*/
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|
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/* Memory mapping of Cortex-M0 Hardware */
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#define SCS_BASE (0xE000E000UL) /*!< System Control Space Base Address */
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#define CoreDebug_BASE (0xE000EDF0UL) /*!< Core Debug Base Address */
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#define SysTick_BASE (SCS_BASE + 0x0010UL) /*!< SysTick Base Address */
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#define NVIC_BASE (SCS_BASE + 0x0100UL) /*!< NVIC Base Address */
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#define SCB_BASE (SCS_BASE + 0x0D00UL) /*!< System Control Block Base Address */
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#define SCB ((SCB_Type *) SCB_BASE ) /*!< SCB configuration struct */
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#define SysTick ((SysTick_Type *) SysTick_BASE ) /*!< SysTick configuration struct */
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#define NVIC ((NVIC_Type *) NVIC_BASE ) /*!< NVIC configuration struct */
|
|
|
|
|
|
/*@} */
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|
|
|
|
|
|
|
/*******************************************************************************
|
|
* Hardware Abstraction Layer
|
|
******************************************************************************/
|
|
/** \defgroup CMSIS_Core_FunctionInterface CMSIS Core Function Interface
|
|
Core Function Interface contains:
|
|
- Core NVIC Functions
|
|
- Core SysTick Functions
|
|
- Core Register Access Functions
|
|
*/
|
|
|
|
|
|
|
|
/* ########################## NVIC functions #################################### */
|
|
/** \ingroup CMSIS_Core_FunctionInterface
|
|
\defgroup CMSIS_Core_NVICFunctions CMSIS Core NVIC Functions
|
|
@{
|
|
*/
|
|
|
|
/* 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
|
|
|
|
This function enables a device specific interrupt in the NVIC interrupt controller.
|
|
The interrupt number cannot be a negative value.
|
|
|
|
\param [in] IRQn Number of the external interrupt to enable
|
|
*/
|
|
static __INLINE void NVIC_EnableIRQ(IRQn_Type IRQn)
|
|
{
|
|
NVIC->ISER[0] = (1 << ((uint32_t)(IRQn) & 0x1F));
|
|
}
|
|
|
|
|
|
/** \brief Disable External Interrupt
|
|
|
|
This function disables a device specific interrupt in the NVIC interrupt controller.
|
|
The interrupt number cannot be a negative value.
|
|
|
|
\param [in] IRQn Number of the external interrupt to disable
|
|
*/
|
|
static __INLINE void NVIC_DisableIRQ(IRQn_Type IRQn)
|
|
{
|
|
NVIC->ICER[0] = (1 << ((uint32_t)(IRQn) & 0x1F));
|
|
}
|
|
|
|
|
|
/** \brief Get Pending Interrupt
|
|
|
|
This function reads the pending register in the NVIC and returns the pending bit
|
|
for the specified interrupt.
|
|
|
|
\param [in] IRQn Number of the interrupt for get pending
|
|
\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
|
|
|
|
This function sets the pending bit for the specified interrupt.
|
|
The interrupt number cannot be a negative value.
|
|
|
|
\param [in] IRQn Number of the interrupt for set pending
|
|
*/
|
|
static __INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn)
|
|
{
|
|
NVIC->ISPR[0] = (1 << ((uint32_t)(IRQn) & 0x1F));
|
|
}
|
|
|
|
|
|
/** \brief Clear Pending Interrupt
|
|
|
|
This function clears the pending bit for the specified interrupt.
|
|
The interrupt number cannot be a negative value.
|
|
|
|
\param [in] IRQn Number of the interrupt for clear pending
|
|
*/
|
|
static __INLINE void NVIC_ClearPendingIRQ(IRQn_Type IRQn)
|
|
{
|
|
NVIC->ICPR[0] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* Clear pending interrupt */
|
|
}
|
|
|
|
|
|
/** \brief Set Interrupt Priority
|
|
|
|
This function sets the priority for the specified interrupt. The interrupt
|
|
number can be positive to specify an external (device specific)
|
|
interrupt, or negative to specify an internal (core) interrupt.
|
|
|
|
Note: The priority cannot be set for every core interrupt.
|
|
|
|
\param [in] IRQn Number of the interrupt for set priority
|
|
\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
|
|
|
|
This function reads the priority for the specified interrupt. The interrupt
|
|
number can be positive to specify an external (device specific)
|
|
interrupt, or negative to specify an internal (core) interrupt.
|
|
|
|
The returned priority value is automatically aligned to the implemented
|
|
priority bits of the microcontroller.
|
|
|
|
\param [in] IRQn Number of the interrupt for get priority
|
|
\return Interrupt Priority
|
|
*/
|
|
static __INLINE uint32_t NVIC_GetPriority(IRQn_Type IRQn)
|
|
{
|
|
|
|
if(IRQn < 0) {
|
|
return((uint32_t)((SCB->SHP[_SHP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) >> (8 - __NVIC_PRIO_BITS))); } /* get priority for Cortex-M0 system interrupts */
|
|
else {
|
|
return((uint32_t)((NVIC->IP[ _IP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) >> (8 - __NVIC_PRIO_BITS))); } /* get priority for device specific interrupts */
|
|
}
|
|
|
|
|
|
/** \brief System Reset
|
|
|
|
This function initiate 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 CMSIS Core SysTick Functions
|
|
@{
|
|
*/
|
|
|
|
#if (__Vendor_SysTickConfig == 0)
|
|
|
|
/** \brief System Tick Configuration
|
|
|
|
This function initialises the system tick timer and its interrupt and start the system tick timer.
|
|
Counter is in free running mode to generate periodical interrupts.
|
|
|
|
\param [in] ticks Number of ticks between two interrupts
|
|
\return 0 Function succeeded
|
|
\return 1 Function failed
|
|
*/
|
|
static __INLINE uint32_t SysTick_Config(uint32_t ticks)
|
|
{
|
|
if (ticks > SysTick_LOAD_RELOAD_Msk) return (1); /* Reload value impossible */
|
|
|
|
SysTick->LOAD = (ticks & SysTick_LOAD_RELOAD_Msk) - 1; /* set reload register */
|
|
NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1); /* set Priority for Cortex-M0 System Interrupts */
|
|
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
|