PM0214 datasheet(194/245 Pages) STMICROELECTRONICS

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Core peripherals

PM0214

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DocID022708 Rev 4

4.3.1

Accessing the Cortex-M4 NVIC registers using CMSIS

CMSIS functions enable software portability between different Cortex-M profile processors.

To access the NVIC registers when using CMSIS, use the following functions:

Table 46. CMSIS access NVIC functions

CMSIS function(1)

1. The input parameter IRQn is the IRQ number,

Description

void NVIC_EnableIRQ(IRQn_Type IRQn)

Enables an interrupt or exception.

void NVIC_DisableIRQ(IRQn_Type IRQn)

Disables an interrupt or exception.

void NVIC_SetPendingIRQ(IRQn_Type IRQn)

Sets the pending status of interrupt or

exception to 1.

void NVIC_ClearPendingIRQ(IRQn_Type IRQn)

Clears the pending status of interrupt or

exception to 0.

uint32_t NVIC_GetPendingIRQ(IRQn_Type IRQn)

Reads the pending status of interrupt or

exception. This function returns non-

zero value if the pending status is set to

void NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority)

Sets the priority of an interrupt or

exception with configurable priority level

to 1.

uint32_t NVIC_GetPriority(IRQn_Type IRQn)

Reads the priority of an interrupt or

exception with configurable priority

level. This function return the current

priority level.

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