471 lines
9.2 KiB
C
471 lines
9.2 KiB
C
/******************************************************************************
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* @file: core_cm0.c
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* @purpose: CMSIS Cortex-M0 Core Peripheral Access Layer Source File
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* @version: V1.10
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* @date: 24. Feb. 2009
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*----------------------------------------------------------------------------
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*
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* Copyright (C) 2009 ARM Limited. All rights reserved.
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*
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* ARM Limited (ARM) is supplying this software for use with Cortex-Mx
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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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* 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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#include <stdint.h>
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/* define compiler specific symbols */
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#if defined ( __CC_ARM )
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#define __ASM __asm /*!< asm keyword for armcc */
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#define __INLINE __inline /*!< inline keyword for armcc */
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#elif defined ( __ICCARM__ )
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#define __ASM __asm /*!< asm keyword for iarcc */
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#define __INLINE inline /*!< inline keyword for iarcc. Only avaiable in High optimization mode! */
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#define __nop __no_operation /*!< no operation intrinsic in iarcc */
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#elif defined ( __GNUC__ )
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#define __ASM asm /*!< asm keyword for gcc */
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#define __INLINE inline /*!< inline keyword for gcc */
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#endif
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#if defined ( __CC_ARM ) /*------------------RealView Compiler -----------------*/
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/**
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* @brief Return the Process Stack Pointer
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*
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* @param none
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* @return uint32_t ProcessStackPointer
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*
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* Return the actual process stack pointer
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*/
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__ASM uint32_t __get_PSP(void)
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{
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mrs r0, psp
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bx lr
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}
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/**
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* @brief Set the Process Stack Pointer
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*
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* @param uint32_t Process Stack Pointer
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* @return none
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*
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* Assign the value ProcessStackPointer to the MSP
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* (process stack pointer) Cortex processor register
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*/
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__ASM void __set_PSP(uint32_t topOfProcStack)
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{
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msr psp, r0
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bx lr
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}
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/**
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* @brief Return the Main Stack Pointer
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*
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* @param none
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* @return uint32_t Main Stack Pointer
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*
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* Return the current value of the MSP (main stack pointer)
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* Cortex processor register
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*/
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__ASM uint32_t __get_MSP(void)
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{
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mrs r0, msp
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bx lr
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}
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/**
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* @brief Set the Main Stack Pointer
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*
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* @param uint32_t Main Stack Pointer
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* @return none
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*
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* Assign the value mainStackPointer to the MSP
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* (main stack pointer) Cortex processor register
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*/
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__ASM void __set_MSP(uint32_t mainStackPointer)
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{
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msr msp, r0
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bx lr
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}
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/**
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* @brief Reverse byte order in unsigned short value
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*
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* @param uint16_t value to reverse
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* @return uint32_t reversed value
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*
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* Reverse byte order in unsigned short value
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*/
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__ASM uint32_t __REV16(uint16_t value)
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{
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rev16 r0, r0
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bx lr
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}
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/**
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* @brief Reverse byte order in signed short value with sign extension to integer
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*
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* @param int16_t value to reverse
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* @return int32_t reversed value
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*
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* Reverse byte order in signed short value with sign extension to integer
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*/
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__ASM int32_t __REVSH(int16_t value)
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{
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revsh r0, r0
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bx lr
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}
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#if (__ARMCC_VERSION < 400000)
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/**
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* @brief Return the Priority Mask value
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*
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* @param none
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* @return uint32_t PriMask
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*
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* Return the state of the priority mask bit from the priority mask
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* register
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*/
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__ASM uint32_t __get_PRIMASK(void)
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{
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mrs r0, primask
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bx lr
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}
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/**
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* @brief Set the Priority Mask value
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*
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* @param uint32_t PriMask
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* @return none
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*
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* Set the priority mask bit in the priority mask register
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*/
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__ASM void __set_PRIMASK(uint32_t priMask)
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{
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msr primask, r0
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bx lr
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}
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/**
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* @brief Return the Control Register value
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*
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* @param none
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* @return uint32_t Control value
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*
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* Return the content of the control register
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*/
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__ASM uint32_t __get_CONTROL(void)
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{
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mrs r0, control
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bx lr
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}
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/**
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* @brief Set the Control Register value
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*
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* @param uint32_t Control value
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* @return none
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*
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* Set the control register
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*/
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__ASM void __set_CONTROL(uint32_t control)
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{
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msr control, r0
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bx lr
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}
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#endif /* __ARMCC_VERSION */
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#elif (defined (__ICCARM__)) /*------------------ ICC Compiler -------------------*/
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#pragma diag_suppress=Pe940
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/**
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* @brief Return the Process Stack Pointer
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*
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* @param none
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* @return uint32_t ProcessStackPointer
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*
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* Return the actual process stack pointer
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*/
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uint32_t __get_PSP(void)
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{
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__ASM("mrs r0, psp");
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__ASM("bx lr");
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}
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/**
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* @brief Set the Process Stack Pointer
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*
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* @param uint32_t Process Stack Pointer
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* @return none
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*
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* Assign the value ProcessStackPointer to the MSP
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* (process stack pointer) Cortex processor register
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*/
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void __set_PSP(uint32_t topOfProcStack)
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{
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__ASM("msr psp, r0");
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__ASM("bx lr");
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}
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/**
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* @brief Return the Main Stack Pointer
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*
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* @param none
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* @return uint32_t Main Stack Pointer
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*
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* Return the current value of the MSP (main stack pointer)
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* Cortex processor register
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*/
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uint32_t __get_MSP(void)
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{
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__ASM("mrs r0, msp");
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__ASM("bx lr");
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}
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/**
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* @brief Set the Main Stack Pointer
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*
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* @param uint32_t Main Stack Pointer
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* @return none
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*
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* Assign the value mainStackPointer to the MSP
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* (main stack pointer) Cortex processor register
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*/
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void __set_MSP(uint32_t topOfMainStack)
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{
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__ASM("msr msp, r0");
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__ASM("bx lr");
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}
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/**
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* @brief Reverse byte order in unsigned short value
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*
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* @param uint16_t value to reverse
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* @return uint32_t reversed value
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*
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* Reverse byte order in unsigned short value
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*/
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uint32_t __REV16(uint16_t value)
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{
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__ASM("rev16 r0, r0");
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__ASM("bx lr");
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}
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#pragma diag_default=Pe940
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#elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/
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/**
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* @brief Return the Process Stack Pointer
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*
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* @param none
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* @return uint32_t ProcessStackPointer
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*
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* Return the actual process stack pointer
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*/
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uint32_t __get_PSP(void)
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{
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uint32_t result=0;
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__ASM volatile ("MRS %0, psp" : "=r" (result) );
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return(result);
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}
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/**
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* @brief Set the Process Stack Pointer
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*
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* @param uint32_t Process Stack Pointer
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* @return none
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*
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* Assign the value ProcessStackPointer to the MSP
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* (process stack pointer) Cortex processor register
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*/
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void __set_PSP(uint32_t topOfProcStack)
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{
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__ASM volatile ("MSR psp, %0" : : "r" (topOfProcStack) );
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}
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/**
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* @brief Return the Main Stack Pointer
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*
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* @param none
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* @return uint32_t Main Stack Pointer
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*
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* Return the current value of the MSP (main stack pointer)
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* Cortex processor register
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*/
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uint32_t __get_MSP(void)
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{
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uint32_t result=0;
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__ASM volatile ("MRS %0, msp" : "=r" (result) );
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return(result);
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}
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/**
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* @brief Set the Main Stack Pointer
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*
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* @param uint32_t Main Stack Pointer
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* @return none
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*
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* Assign the value mainStackPointer to the MSP
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* (main stack pointer) Cortex processor register
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*/
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void __set_MSP(uint32_t topOfMainStack)
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{
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__ASM volatile ("MSR msp, %0" : : "r" (topOfMainStack) );
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}
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/**
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* @brief Return the Priority Mask value
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*
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* @param none
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* @return uint32_t PriMask
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*
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* Return the state of the priority mask bit from the priority mask
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* register
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*/
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uint32_t __get_PRIMASK(void)
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{
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uint32_t result=0;
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__ASM volatile ("MRS %0, primask" : "=r" (result) );
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return(result);
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}
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/**
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* @brief Set the Priority Mask value
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*
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* @param uint32_t PriMask
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* @return none
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*
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* Set the priority mask bit in the priority mask register
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*/
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void __set_PRIMASK(uint32_t priMask)
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{
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__ASM volatile ("MSR primask, %0" : : "r" (priMask) );
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}
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/**
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* @brief Reverse byte order in integer value
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*
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* @param uint32_t value to reverse
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* @return uint32_t reversed value
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*
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* Reverse byte order in integer value
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*/
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uint32_t __REV(uint32_t value)
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{
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uint32_t result=0;
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__ASM volatile ("rev %0, %1" : "=r" (result) : "r" (value) );
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return(result);
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}
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/**
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* @brief Reverse byte order in unsigned short value
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*
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* @param uint16_t value to reverse
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* @return uint32_t reversed value
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*
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* Reverse byte order in unsigned short value
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*/
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uint32_t __REV16(uint16_t value)
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{
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uint32_t result=0;
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__ASM volatile ("rev16 %0, %1" : "=r" (result) : "r" (value) );
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return(result);
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}
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/**
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* @brief Reverse byte order in signed short value with sign extension to integer
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*
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* @param int32_t value to reverse
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* @return int32_t reversed value
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*
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* Reverse byte order in signed short value with sign extension to integer
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*/
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int32_t __REVSH(int16_t value)
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{
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uint32_t result=0;
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__ASM volatile ("revsh %0, %1" : "=r" (result) : "r" (value) );
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return(result);
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}
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/**
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* @brief Return the Control Register value
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*
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* @param none
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* @return uint32_t Control value
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*
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* Return the content of the control register
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*/
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uint32_t __get_CONTROL(void)
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{
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uint32_t result=0;
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__ASM volatile ("MRS %0, control" : "=r" (result) );
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return(result);
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}
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/**
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* @brief Set the Control Register value
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*
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* @param uint32_t Control value
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* @return none
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*
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* Set the control register
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*/
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void __set_CONTROL(uint32_t control)
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{
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__ASM volatile ("MSR control, %0" : : "r" (control) );
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}
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#endif
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