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/**************************************************************************//**
* @file core_cm3.c
* @brief CMSIS Cortex-M3 Core Peripheral Access Layer Source File
* @version V1.40
* @date 18. February 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 <stdint.h>
/* 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)
*
* @param value value to reverse
* @return reversed value
*
* Reverse byte order in unsigned short value
*/
#if (__ARMCC_VERSION < 400677)
__ASM uint32_t __REV16(uint16_t value)
{
rev16 r0, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Reverse byte order in signed short value with sign extension to integer
*
* @param value value to reverse
* @return reversed value
*
* Reverse byte order in signed short value with sign extension to integer
*/
#if (__ARMCC_VERSION < 400677)
__ASM int32_t __REVSH(int16_t value)
{
revsh r0, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Remove the exclusive lock created by ldrex
*
* 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 Return the Control Register value
*
* @return Control value
*
* Return the content of the control register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_CONTROL(void)
{
mrs r0, control
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Set the Control Register value
*
* @param control Control value
*
* Set the control register
*/
#if (__ARMCC_VERSION < 400000)
__ASM void __set_CONTROL(uint32_t control)
{
msr control, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Get IPSR Register value
*
* @return uint32_t IPSR value
*
* return the content of the IPSR register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_IPSR(void)
{
mrs r0, ipsr
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Get APSR Register value
*
* @return uint32_t APSR value
*
* return the content of the APSR register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_APSR(void)
{
mrs r0, apsr
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Get xPSR Register value
*
* @return uint32_t xPSR value
*
* return the content of the xPSR register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_xPSR(void)
{
mrs r0, xpsr
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Return the Process Stack Pointer
*
* @return ProcessStackPointer
*
* Return the actual process stack pointer
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_PSP(void)
{
mrs r0, psp
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Set the Process Stack Pointer
*
* @param topOfProcStack Process Stack Pointer
*
* Assign the value ProcessStackPointer to the MSP
* (process stack pointer) Cortex processor register
*/
#if (__ARMCC_VERSION < 400000)
__ASM void __set_PSP(uint32_t topOfProcStack)
{
msr psp, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Return the Main Stack Pointer
*
* @return Main Stack Pointer
*
* Return the current value of the MSP (main stack pointer)
* Cortex processor register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_MSP(void)
{
mrs r0, msp
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Set the Main Stack Pointer
*
* @param topOfMainStack Main Stack Pointer
*
* Assign the value mainStackPointer to the MSP
* (main stack pointer) Cortex processor register
*/
#if (__ARMCC_VERSION < 400000)
__ASM void __set_MSP(uint32_t mainStackPointer)
{
msr msp, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Return the Base Priority value
*
* @return BasePriority
*
* Return the content of the base priority register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_BASEPRI(void)
{
mrs r0, basepri
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Set the Base Priority value
*
* @param basePri BasePriority
*
* Set the base priority register
*/
#if (__ARMCC_VERSION < 400000)
__ASM void __set_BASEPRI(uint32_t basePri)
{
msr basepri, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Return the Priority Mask value
*
* @return PriMask
*
* Return state of the priority mask bit from the priority mask register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_PRIMASK(void)
{
mrs r0, primask
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Set the Priority Mask value
*
* @param priMask PriMask
*
* Set the priority mask bit in the priority mask register
*/
#if (__ARMCC_VERSION < 400000)
__ASM void __set_PRIMASK(uint32_t priMask)
{
msr primask, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Return the Fault Mask value
*
* @return FaultMask
*
* Return the content of the fault mask register
*/
#if (__ARMCC_VERSION < 400000)
__ASM uint32_t __get_FAULTMASK(void)
{
mrs r0, faultmask
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Set the Fault Mask value
*
* @param faultMask faultMask value
*
* Set the fault mask register
*/
#if (__ARMCC_VERSION < 400000)
__ASM void __set_FAULTMASK(uint32_t faultMask)
{
msr faultmask, r0
bx lr
}
#endif /* __ARMCC_VERSION */
/**
* @brief Return the FPSCR value
*
* @return FloatingPointStatusControlRegister
*
* Return the content of the FPSCR register
*/
/**
* @brief Set the FPSCR value
*
* @param fpscr FloatingPointStatusControlRegister
*
* Set the FPSCR register
*/
#elif (defined (__ICCARM__)) /*---------------- ICC Compiler ---------------------*/
/* obsolete */
#elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/
/* obsolete */
#elif (defined (__TASKING__)) /*--------------- TASKING Compiler -----------------*/
/* obsolete */
#endif
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