M453

void GPA_IRQHandler(void)
{
    /* To check if PA.0 interrupt occurred */
    if(GPIO_GET_INT_FLAG(PA, BIT0))
    {
        GPIO_CLR_INT_FLAG(PA, BIT0);
        printf("PA.0 INT occurred.\n");
    }
    else
    {
        /* Un-expected interrupt. Just clear all PA interrupts */
        PA->INTSRC = PA->INTSRC;
        printf("Un-expected interrupts.\n");
    }
}