/* mbed Microcontroller Library - cmsis_nvic for LCP1768
 * Copyright (c) 2009-2011 ARM Limited. All rights reserved.
 *
 * CMSIS-style functionality to support dynamic vectors
 */ 
#include "cmsis_nvic.h"

#define NVIC_NUM_VECTORS          (16 + 33)     // CORE + MCU Peripherals
#define NVIC_RAM_VECTOR_ADDRESS   (0x10000000)  // Location of vectors in RAM

void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
    static volatile uint32_t* vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
    int i;
    // Copy and switch to dynamic vectors if first time called
    if (SCB->VTOR != NVIC_RAM_VECTOR_ADDRESS) {
        uint32_t *old_vectors = (uint32_t*)SCB->VTOR;
        for (i=0; i<NVIC_NUM_VECTORS; i++) {
            vectors[i] = old_vectors[i];
        }
        SCB->VTOR = (uint32_t)vectors;
    }
    
    vectors[IRQn + 16] = vector;
}

uint32_t NVIC_GetVector(IRQn_Type IRQn) {
    uint32_t *vectors = (uint32_t*)SCB->VTOR;
    return vectors[IRQn + 16];
}

