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NVIC Functions
Functions

NVIC Functions
[Functions and Instructions Reference]

Functions that manage interrupts and exceptions via the NVIC. More...

Functions

__STATIC_INLINE void NVIC_SetPriorityGrouping (uint32_t PriorityGroup)
 Set Priority Grouping.
__STATIC_INLINE uint32_t NVIC_GetPriorityGrouping (void)
 Get Priority Grouping.
__STATIC_INLINE void NVIC_EnableIRQ (IRQn_Type IRQn)
 Enable External Interrupt.
__STATIC_INLINE void NVIC_DisableIRQ (IRQn_Type IRQn)
 Disable External Interrupt.
__STATIC_INLINE uint32_t NVIC_GetPendingIRQ (IRQn_Type IRQn)
 Get Pending Interrupt.
__STATIC_INLINE void NVIC_SetPendingIRQ (IRQn_Type IRQn)
 Set Pending Interrupt.
__STATIC_INLINE void NVIC_ClearPendingIRQ (IRQn_Type IRQn)
 Clear Pending Interrupt.
__STATIC_INLINE uint32_t NVIC_GetActive (IRQn_Type IRQn)
 Get Active Interrupt.
__STATIC_INLINE void NVIC_SetPriority (IRQn_Type IRQn, uint32_t priority)
 Set Interrupt Priority.
__STATIC_INLINE uint32_t NVIC_GetPriority (IRQn_Type IRQn)
 Get Interrupt Priority.
__STATIC_INLINE uint32_t NVIC_EncodePriority (uint32_t PriorityGroup, uint32_t PreemptPriority, uint32_t SubPriority)
 Encode Priority.
__STATIC_INLINE void NVIC_DecodePriority (uint32_t Priority, uint32_t PriorityGroup, uint32_t *pPreemptPriority, uint32_t *pSubPriority)
 Decode Priority.
__STATIC_INLINE void NVIC_SystemReset (void)
 System Reset.

Detailed Description

Functions that manage interrupts and exceptions via the NVIC.

Function Documentation

__STATIC_INLINE void NVIC_ClearPendingIRQ ( IRQn_Type  IRQn )

Clear Pending Interrupt.

The function clears the pending bit of an external interrupt.

Parameters:
[in]IRQnExternal interrupt number. Value cannot be negative.

Definition at line 1298 of file core_cm3.h.

__STATIC_INLINE void NVIC_DecodePriority ( uint32_t  Priority,
uint32_t  PriorityGroup,
uint32_t *  pPreemptPriority,
uint32_t *  pSubPriority 
)

Decode Priority.

The function decodes an interrupt priority value with a given priority group to preemptive priority value and subpriority value. In case of a conflict between priority grouping and available priority bits (__NVIC_PRIO_BITS) the samllest possible priority group is set.

Parameters:
[in]PriorityPriority value, which can be retrieved with the function NVIC_GetPriority().
[in]PriorityGroupUsed priority group.
[out]pPreemptPriorityPreemptive priority value (starting from 0).
[out]pSubPrioritySubpriority value (starting from 0).

Definition at line 1398 of file core_cm3.h.

__STATIC_INLINE void NVIC_DisableIRQ ( IRQn_Type  IRQn )

Disable External Interrupt.

The function disables a device-specific interrupt in the NVIC interrupt controller.

Parameters:
[in]IRQnExternal interrupt number. Value cannot be negative.

Definition at line 1258 of file core_cm3.h.

__STATIC_INLINE void NVIC_EnableIRQ ( IRQn_Type  IRQn )

Enable External Interrupt.

The function enables a device-specific interrupt in the NVIC interrupt controller.

Parameters:
[in]IRQnExternal interrupt number. Value cannot be negative.

Definition at line 1246 of file core_cm3.h.

__STATIC_INLINE uint32_t NVIC_EncodePriority ( uint32_t  PriorityGroup,
uint32_t  PreemptPriority,
uint32_t  SubPriority 
)

Encode Priority.

The function encodes the priority for an interrupt with the given priority group, preemptive priority value, and subpriority value. In case of a conflict between priority grouping and available priority bits (__NVIC_PRIO_BITS), the samllest possible priority group is set.

Parameters:
[in]PriorityGroupUsed priority group.
[in]PreemptPriorityPreemptive priority value (starting from 0).
[in]SubPrioritySubpriority value (starting from 0).
Returns:
Encoded priority. Value can be used in the function NVIC_SetPriority().

Definition at line 1370 of file core_cm3.h.

__STATIC_INLINE uint32_t NVIC_GetActive ( IRQn_Type  IRQn )

Get Active Interrupt.

The function reads the active register in NVIC and returns the active bit.

Parameters:
[in]IRQnInterrupt number.
Returns:
0 Interrupt status is not active.
1 Interrupt status is active.

Definition at line 1313 of file core_cm3.h.

__STATIC_INLINE uint32_t NVIC_GetPendingIRQ ( IRQn_Type  IRQn )

Get Pending Interrupt.

The function reads the pending register in the NVIC and returns the pending bit for the specified interrupt.

Parameters:
[in]IRQnInterrupt number.
Returns:
0 Interrupt status is not pending.
1 Interrupt status is pending.

Definition at line 1274 of file core_cm3.h.

__STATIC_INLINE uint32_t NVIC_GetPriority ( IRQn_Type  IRQn )

Get Interrupt Priority.

The function reads the priority of an interrupt. The interrupt number can be positive to specify an external (device specific) interrupt, or negative to specify an internal (core) interrupt.

Parameters:
[in]IRQnInterrupt number.
Returns:
Interrupt Priority. Value is aligned automatically to the implemented priority bits of the microcontroller.

Definition at line 1348 of file core_cm3.h.

__STATIC_INLINE uint32_t NVIC_GetPriorityGrouping ( void   )

Get Priority Grouping.

The function reads the priority grouping field from the NVIC Interrupt Controller.

Returns:
Priority grouping field (SCB->AIRCR [10:8] PRIGROUP field).

Definition at line 1234 of file core_cm3.h.

__STATIC_INLINE void NVIC_SetPendingIRQ ( IRQn_Type  IRQn )

Set Pending Interrupt.

The function sets the pending bit of an external interrupt.

Parameters:
[in]IRQnInterrupt number. Value cannot be negative.

Definition at line 1286 of file core_cm3.h.

__STATIC_INLINE void NVIC_SetPriority ( IRQn_Type  IRQn,
uint32_t  priority 
)

Set Interrupt Priority.

The function sets the priority of an interrupt.

Note:
The priority cannot be set for every core interrupt.
Parameters:
[in]IRQnInterrupt number.
[in]priorityPriority to set.

Definition at line 1328 of file core_cm3.h.

__STATIC_INLINE void NVIC_SetPriorityGrouping ( uint32_t  PriorityGroup )

Set Priority Grouping.

The function sets the priority grouping field using the required unlock sequence. The parameter PriorityGroup is assigned to the field SCB->AIRCR [10:8] PRIGROUP field. Only values from 0..7 are used. In case of a conflict between priority grouping and available priority bits (__NVIC_PRIO_BITS), the smallest possible priority group is set.

Parameters:
[in]PriorityGroupPriority grouping field.

Definition at line 1214 of file core_cm3.h.

__STATIC_INLINE void NVIC_SystemReset ( void   )

System Reset.

The function initiates a system reset request to reset the MCU.

Definition at line 1416 of file core_cm3.h.

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