/**************************************************************************//** * @file core_cm3.c * @brief CMSIS Cortex-M3 Core Peripheral Access Layer Source File * @version V2.00 * @date 13. September 2010 * * @note * Copyright (C) 2009-2010 ARM Limited. All rights reserved. * * @par * ARM Limited (ARM) is supplying this software for use with Cortex-M * processor based microcontrollers. This file can be freely distributed * within development tools that are supporting such ARM based processors. * * @par * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. * ******************************************************************************/ #include /* define compiler specific symbols */ #if defined ( __CC_ARM ) #define __ASM __asm /*!< asm keyword for ARM Compiler */ #define __INLINE __inline /*!< inline keyword for ARM Compiler */ #elif defined ( __ICCARM__ ) #define __ASM __asm /*!< asm keyword for IAR Compiler */ #define __INLINE inline /*!< inline keyword for IAR Compiler. Only avaiable in High optimization mode! */ #elif defined ( __GNUC__ ) #define __ASM __asm /*!< asm keyword for GNU Compiler */ #define __INLINE inline /*!< inline keyword for GNU Compiler */ #elif defined ( __TASKING__ ) #define __ASM __asm /*!< asm keyword for TASKING Compiler */ #define __INLINE inline /*!< inline keyword for TASKING Compiler */ #endif /* ########################## Core Instruction Access ######################### */ #if defined ( __CC_ARM ) /*------------------ RealView Compiler ----------------*/ /** \brief Reverse byte order (16 bit) This function reverses the byte order in two unsigned short values. \param [in] value Value to reverse \return Reversed value */ #if (__ARMCC_VERSION < 400677) __ASM uint32_t __REV16(uint32_t value) { rev16 r0, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Reverse byte order in signed short value This function reverses the byte order in a signed short value with sign extension to integer. \param [in] value Value to reverse \return Reversed value */ #if (__ARMCC_VERSION < 400677) __ASM int32_t __REVSH(int32_t value) { revsh r0, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Remove the exclusive lock This function removes the exclusive lock which is created by LDREX. */ #if (__ARMCC_VERSION < 400000) __ASM void __CLREX(void) { clrex } #endif /* __ARMCC_VERSION */ #elif (defined (__ICCARM__)) /*---------------- ICC Compiler ---------------------*/ /* obsolete */ #elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/ /* obsolete */ #elif (defined (__TASKING__)) /*--------------- TASKING Compiler -----------------*/ /* obsolete */ #endif /* ########################### Core Function Access ########################### */ #if defined ( __CC_ARM ) /*------------------ RealView Compiler ----------------*/ /** \brief Get Control Register This function returns the content of the Control Register. \return Control Register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_CONTROL(void) { mrs r0, control bx lr } #endif /* __ARMCC_VERSION */ /** \brief Set Control Register This function writes the given value to the Control Register. \param [in] control Control Register value to set */ #if (__ARMCC_VERSION < 400000) __ASM void __set_CONTROL(uint32_t control) { msr control, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get ISPR Register This function returns the content of the ISPR Register. \return ISPR Register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_IPSR(void) { mrs r0, ipsr bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get APSR Register This function returns the content of the APSR Register. \return APSR Register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_APSR(void) { mrs r0, apsr bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get xPSR Register This function returns the content of the xPSR Register. \return xPSR Register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_xPSR(void) { mrs r0, xpsr bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get Process Stack Pointer This function returns the current value of the Process Stack Pointer (PSP). \return PSP Register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_PSP(void) { mrs r0, psp bx lr } #endif /* __ARMCC_VERSION */ /** \brief Set Process Stack Pointer This function assigns the given value to the Process Stack Pointer (PSP). \param [in] topOfProcStack Process Stack Pointer value to set */ #if (__ARMCC_VERSION < 400000) __ASM void __set_PSP(uint32_t topOfProcStack) { msr psp, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get Main Stack Pointer This function returns the current value of the Main Stack Pointer (MSP). \return MSP Register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_MSP(void) { mrs r0, msp bx lr } #endif /* __ARMCC_VERSION */ /** \brief Set Main Stack Pointer This function assigns the given value to the Main Stack Pointer (MSP). \param [in] topOfMainStack Main Stack Pointer value to set */ #if (__ARMCC_VERSION < 400000) __ASM void __set_MSP(uint32_t mainStackPointer) { msr msp, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get Base Priority This function returns the current value of the Base Priority register. \return Base Priority register value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_BASEPRI(void) { mrs r0, basepri bx lr } #endif /* __ARMCC_VERSION */ /** \brief Set Base Priority This function assigns the given value to the Base Priority register. \param [in] basePri Base Priority value to set */ #if (__ARMCC_VERSION < 400000) __ASM void __set_BASEPRI(uint32_t basePri) { msr basepri, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get Priority Mask This function returns the current state of the priority mask bit from the Priority Mask Register. \return Priority Mask value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_PRIMASK(void) { mrs r0, primask bx lr } #endif /* __ARMCC_VERSION */ /** \brief Set Priority Mask This function assigns the given value to the Priority Mask Register. \param [in] priMask Priority Mask */ #if (__ARMCC_VERSION < 400000) __ASM void __set_PRIMASK(uint32_t priMask) { msr primask, r0 bx lr } #endif /* __ARMCC_VERSION */ /** \brief Get Fault Mask This function returns the current value of the Fault Mask Register. \return Fault Mask value */ #if (__ARMCC_VERSION < 400000) __ASM uint32_t __get_FAULTMASK(void) { mrs r0, faultmask bx lr } #endif /* __ARMCC_VERSION */ /** \brief Set the Fault Mask This function assigns the given value to the Fault Mask Register. \param [in] faultMask Fault Mask value value to set */ #if (__ARMCC_VERSION < 400000) __ASM void __set_FAULTMASK(uint32_t faultMask) { msr faultmask, r0 bx lr } #endif /* __ARMCC_VERSION */ #elif (defined (__ICCARM__)) /*---------------- ICC Compiler ---------------------*/ /* obsolete */ #elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/ /* obsolete */ #elif (defined (__TASKING__)) /*--------------- TASKING Compiler -----------------*/ /* obsolete */ #endif