Toyomasa Watarai / mbed-dev

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targets/cmsis/TARGET_STM/TARGET_STM32F4XX/cmsis_nvic.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library - cmsis_nvic for STM32F4
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2009-2011 ARM Limited. All rights reserved.
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * CMSIS-style functionality to support dynamic vectors
bogdanm 0:9b334a45a8ff 5 */
bogdanm 0:9b334a45a8ff 6 #include "cmsis_nvic.h"
bogdanm 0:9b334a45a8ff 7
bogdanm 0:9b334a45a8ff 8 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM
bogdanm 0:9b334a45a8ff 9
bogdanm 0:9b334a45a8ff 10 static unsigned char vtor_relocated;
bogdanm 0:9b334a45a8ff 11
bogdanm 0:9b334a45a8ff 12 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 0:9b334a45a8ff 13 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 0:9b334a45a8ff 14 uint32_t i;
bogdanm 0:9b334a45a8ff 15
bogdanm 0:9b334a45a8ff 16 // Copy and switch to dynamic vectors if the first time called
bogdanm 0:9b334a45a8ff 17 if (!vtor_relocated) {
bogdanm 0:9b334a45a8ff 18 uint32_t *old_vectors = vectors;
bogdanm 0:9b334a45a8ff 19 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 20 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 0:9b334a45a8ff 21 vectors[i] = old_vectors[i];
bogdanm 0:9b334a45a8ff 22 }
bogdanm 0:9b334a45a8ff 23 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 24 vtor_relocated = 1;
bogdanm 0:9b334a45a8ff 25 }
bogdanm 0:9b334a45a8ff 26 vectors[IRQn + 16] = vector;
bogdanm 0:9b334a45a8ff 27 }
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 0:9b334a45a8ff 30 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 0:9b334a45a8ff 31 return vectors[IRQn + 16];
bogdanm 0:9b334a45a8ff 32 }
bogdanm 0:9b334a45a8ff 33