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##

# 1.2.8.5 SYS_INT_SourceEnable Function

## C

    void SYS_INT_SourceEnable( INT_SOURCE source )

## Summary

Enables the specified interrupt source.

## Description

This function enables the specified interrupt source/line at the interrupt controller level.

## Precondition

None.

## Parameters

Param | Description
--- | ---
source | Interrupt source/line available at interrupt controller.

## Returns

None.

## Example

    SYS_INT_SourceEnable(USART0_IRQn);

## Remarks

The corresponding module level interrupts must be enabled to trigger the specified interrupt source/line. For example, USART0 interrupt enable at interrupt controller level is not triggered unless USART0 module level interrupt for TXRDY or RXRDY or Error interrupts are not enabled.