1 /* mbed Microcontroller Library - cmsis_nvic for STM32F4
2 * Copyright (c) 2009-2011 ARM Limited. All rights reserved.
4 * CMSIS-style functionality to support dynamic vectors
6 #include "cmsis_nvic.h"
8 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM
10 static unsigned char vtor_relocated;
12 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
13 uint32_t *vectors = (uint32_t*)SCB->VTOR;
16 // Copy and switch to dynamic vectors if the first time called
17 if (!vtor_relocated) {
18 uint32_t *old_vectors = vectors;
19 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
20 for (i=0; i<NVIC_NUM_VECTORS; i++) {
21 vectors[i] = old_vectors[i];
23 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
26 vectors[IRQn + 16] = vector;
29 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
30 uint32_t *vectors = (uint32_t*)SCB->VTOR;
31 return vectors[IRQn + 16];