CMSIS CM3 Core Function Interface
[CM3 Core Definitions]

Clear the pending bit for an external interrupt.

Parameters:

IRQn	The number of the interrupt for clear pending

Clear the pending bit for the specified interrupt. The interrupt number cannot be a negative value.

Definition at line 1601 of file core_cm3.h.

Decode the priority of an interrupt.

Parameters:

Priority	The priority for the interrupt
PriorityGroup	The used priority group
pPreemptPriority	The preemptive priority value (starting from 0)
pSubPriority	The sub priority value (starting from 0)

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

The priority value can be retrieved with NVIC_GetPriority(...) function

Definition at line 1715 of file core_cm3.h.

Disable the interrupt line for external interrupt specified.

Parameters:

IRQn	The positive number of the external interrupt to disable

Disable a device specific interupt in the NVIC interrupt controller. The interrupt number cannot be a negative value.

Definition at line 1561 of file core_cm3.h.

Enable Interrupt in NVIC Interrupt Controller.

Parameters:

IRQn	The positive number of the external interrupt to enable

Enable a device specific interupt in the NVIC interrupt controller. The interrupt number cannot be a negative value.

Definition at line 1548 of file core_cm3.h.

Encode the priority for an interrupt.

Parameters:

PriorityGroup	The used priority group
PreemptPriority	The preemptive priority value (starting from 0)
SubPriority	The sub priority value (starting from 0)

Returns:

The encoded priority for the interrupt

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

The returned priority value can be used for NVIC_SetPriority(...) function

Definition at line 1684 of file core_cm3.h.

Read the active bit for an external interrupt.

Parameters:

IRQn	The number of the interrupt for read active bit

Returns:

1 = interrupt active, 0 = interrupt not active

Read the active register in NVIC and returns 1 if its status is active, otherwise it returns 0.

Definition at line 1615 of file core_cm3.h.

Read the interrupt pending bit for a device specific interrupt source.

Parameters:

IRQn	The number of the device specifc interrupt

Returns:

1 = interrupt pending, 0 = interrupt not pending

Read the pending register in NVIC and return 1 if its status is pending, otherwise it returns 0

Definition at line 1575 of file core_cm3.h.

Read the priority for an interrupt.

Parameters:

IRQn	The number of the interrupt for get priority

Returns:

The priority for the interrupt

Read the priority for the specified interrupt. The interrupt number can be positive to specify an external (device specific) interrupt, or negative to specify an internal (core) interrupt.

The returned priority value is automatically aligned to the implemented priority bits of the microcontroller.

Note: The priority cannot be set for every core interrupt.

Definition at line 1657 of file core_cm3.h.

Get the Priority Grouping from NVIC Interrupt Controller.

Returns:

priority grouping field

Get the priority grouping from NVIC Interrupt Controller. priority grouping is SCB->AIRCR [10:8] PRIGROUP field.

Definition at line 1535 of file core_cm3.h.

Set the pending bit for an external interrupt.

Parameters:

IRQn	The number of the interrupt for set pending

Set the pending bit for the specified interrupt. The interrupt number cannot be a negative value.

Definition at line 1588 of file core_cm3.h.

Set the priority for an interrupt.

Parameters:

IRQn	The number of the interrupt for set priority
priority	The priority to set

Set the priority for the specified interrupt. The interrupt number can be positive to specify an external (device specific) interrupt, or negative to specify an internal (core) interrupt.

Note: The priority cannot be set for every core interrupt.

Definition at line 1632 of file core_cm3.h.

Set the Priority Grouping in NVIC Interrupt Controller.

Parameters:

PriorityGroup

is priority grouping field

Set the priority grouping field using the required unlock sequence. The parameter priority_grouping 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.

Definition at line 1514 of file core_cm3.h.

Initiate a system reset request.

Initiate a system reset request to reset the MCU

Definition at line 1769 of file core_cm3.h.

Initialize and start the SysTick counter and its interrupt.

Parameters:

ticks

number of ticks between two interrupts

Returns:

1 = failed, 0 = successful

Initialise the system tick timer and its interrupt and start the system tick timer / counter in free running mode to generate periodical interrupts.

Definition at line 1744 of file core_cm3.h.