PM0214 datasheet(58/245 Pages) STMICROELECTRONICS

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The STM32 Cortex-M4 instruction set

PM0214

58/245

DocID022708 Rev 4

The CMSIS also provides a number of functions for accessing the special registers using

MRS

and MSR instructions (see Table 23).

Table 22. CMSIS intrinsic functions to generate some Cortex-M4 instructions

Instruction

CMSIS intrinsic function

CPSIE I

void __enable_irq(void)

CPSID I

void __disable_irq(void)

CPSIE F

void __enable_fault_irq(void)

CPSID F

void __disable_fault_irq(void)

ISB

void __ISB(void)

DSB

void __DSB(void)

DMB

void __DMB(void)

REV

uint32_t __REV(uint32_t int value)

REV16

uint32_t __REV16(uint32_t int value)

REVSH

uint32_t __REVSH(uint32_t int value)

RBIT

uint32_t __RBIT(uint32_t int value)

SEV

void __SEV(void)

WFE

void __WFE(void)

WFI

void __WFI(void)

Table 23. CMSIS intrinsic functions to access the special registers

Special register

Access

CMSIS function

PRIMASK

Read

uint32_t __get_PRIMASK (void)

Write

void __set_PRIMASK (uint32_t value)

FAULTMASK

Read

uint32_t __get_FAULTMASK (void)

Write

void __set_FAULTMASK (uint32_t value)

BASEPRI

Read

uint32_t __get_BASEPRI (void)

Write

void __set_BASEPRI (uint32_t value)

CONTROL

Read

uint32_t __get_CONTROL (void)

Write

void __set_CONTROL (uint32_t value)

MSP

Read

uint32_t __get_MSP (void)

Write

void __set_MSP (uint32_t TopOfMainStack)

PSP

Read

uint32_t __get_PSP (void)

Write

void __set_PSP (uint32_t TopOfProcStack)

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