CMSIS Core Instruction Interface

Functions
__STATIC_INLINE void	__NOP (void)
	No Operation.
__STATIC_INLINE void	__WFI (void)
	Wait For Interrupt.
__STATIC_INLINE void	__WFE (void)
	Wait For Event.
__STATIC_INLINE void	__SEV (void)
	Send Event.
__STATIC_INLINE void	__ISB (void)
	Instruction Synchronization Barrier.
__STATIC_INLINE void	__DSB (void)
	Data Synchronization Barrier.
__STATIC_INLINE void	__DMB (void)
	Data Memory Barrier.
__STATIC_INLINE uint32_t	__REV (uint32_t value)
	Reverse byte order (32 bit)
__STATIC_INLINE uint32_t	__REV16 (uint32_t value)
	Reverse byte order (16 bit)
__STATIC_INLINE int32_t	__REVSH (int32_t value)
	Reverse byte order in signed short value.
__STATIC_INLINE uint32_t	__ROR (uint32_t op1, uint32_t op2)
	Rotate Right in unsigned value (32 bit)

---

Detailed Description

Access to dedicated instructions

---

Function Documentation

__STATIC_INLINE void __NOP

(

void

)

No Operation.

No Operation does nothing. This instruction can be used for code alignment purposes.

References __ASM.

__STATIC_INLINE void __WFI

(

void

)

Wait For Interrupt.

Wait For Interrupt is a hint instruction that suspends execution until one of a number of events occurs.

References __ASM.

__STATIC_INLINE void __WFE

(

void

)

Wait For Event.

Wait For Event is a hint instruction that permits the processor to enter a low-power state until one of a number of events occurs.

References __ASM.

__STATIC_INLINE void __SEV

(

void

)

Send Event.

Send Event is a hint instruction. It causes an event to be signaled to the CPU.

References __ASM.

__STATIC_INLINE void __ISB

(

void

)

Instruction Synchronization Barrier.

Instruction Synchronization Barrier flushes the pipeline in the processor, so that all instructions following the ISB are fetched from cache or memory, after the instruction has been completed.

References __ASM.

__STATIC_INLINE void __DSB

(

void

)

Data Synchronization Barrier.

This function acts as a special kind of Data Memory Barrier. It completes when all explicit memory accesses before this instruction complete.

References __ASM.

Referenced by NVIC_SystemReset().

__STATIC_INLINE void __DMB

(

void

)

Data Memory Barrier.

This function ensures the apparent order of the explicit memory operations before and after the instruction, without ensuring their completion.

References __ASM.

__STATIC_INLINE uint32_t __REV

(

uint32_t

value

)

Reverse byte order (32 bit)

This function reverses the byte order in integer value.

Parameters:

[in]

value

Value to reverse

Returns:

Reversed value

References __ASM.

__STATIC_INLINE uint32_t __REV16

(

uint32_t

value

)

Reverse byte order (16 bit)

This function reverses the byte order in two unsigned short values.

Parameters:

[in]

value

Value to reverse

Returns:

Reversed value

References __ASM.

__STATIC_INLINE int32_t __REVSH

(

int32_t

value

)

Reverse byte order in signed short value.

This function reverses the byte order in a signed short value with sign extension to integer.

Parameters:

[in]

value

Value to reverse

Returns:

Reversed value

References __ASM.

__STATIC_INLINE uint32_t __ROR	(	uint32_t	op1,
		uint32_t	op2
	)

Rotate Right in unsigned value (32 bit)

This function Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.

Parameters:

[in]	value	Value to rotate
[in]	value	Number of Bits to rotate

Returns:

Rotated value

References __ASM.