gabriel della-monica / mbed-src

mbed library sources

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targets/cmsis/TARGET_STM/TARGET_STM32F4XX/cmsis_nvic.c@445:9a3ffe6cfa19, 2015-01-14 (annotated)

Committer:
moirans2
Date:
Wed Jan 14 20:53:08 2015 +0000
Revision:
445:9a3ffe6cfa19
Parent:
39:6f0d2ff04ac3 
internal clock stm32L051

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library - cmsis_nvic for STM32F4
bogdanm 20:4263a77256ae 2 * Copyright (c) 2009-2011 ARM Limited. All rights reserved.
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * CMSIS-style functionality to support dynamic vectors
bogdanm 20:4263a77256ae 5 */
bogdanm 20:4263a77256ae 6 #include "cmsis_nvic.h"
bogdanm 20:4263a77256ae 7
bogdanm 20:4263a77256ae 8 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM
mbed_official 39:6f0d2ff04ac3 9
mbed_official 39:6f0d2ff04ac3 10 static unsigned char vtor_relocated;
bogdanm 20:4263a77256ae 11
bogdanm 20:4263a77256ae 12 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 20:4263a77256ae 13 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 20:4263a77256ae 14 uint32_t i;
bogdanm 20:4263a77256ae 15
bogdanm 20:4263a77256ae 16 // Copy and switch to dynamic vectors if the first time called
mbed_official 39:6f0d2ff04ac3 17 if (!vtor_relocated) {
bogdanm 20:4263a77256ae 18 uint32_t *old_vectors = vectors;
bogdanm 20:4263a77256ae 19 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 20:4263a77256ae 20 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 20:4263a77256ae 21 vectors[i] = old_vectors[i];
bogdanm 20:4263a77256ae 22 }
bogdanm 20:4263a77256ae 23 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 39:6f0d2ff04ac3 24 vtor_relocated = 1;
bogdanm 20:4263a77256ae 25 }
bogdanm 20:4263a77256ae 26 vectors[IRQn + 16] = vector;
bogdanm 20:4263a77256ae 27 }
bogdanm 20:4263a77256ae 28
bogdanm 20:4263a77256ae 29 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 20:4263a77256ae 30 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 20:4263a77256ae 31 return vectors[IRQn + 16];
bogdanm 20:4263a77256ae 32 }
bogdanm 20:4263a77256ae 33