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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F4XX/cmsis_nvic.c@20:4263a77256ae, 2013-09-10 (annotated)

Committer:
bogdanm
Date:
Tue Sep 10 15:14:19 2013 +0300
Revision:
20:4263a77256ae
Child:
39:6f0d2ff04ac3
Sync with git revision 171dda705c947bf910926a0b73d6a4797802554d

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
bogdanm 20:4263a77256ae 9 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
bogdanm 20:4263a77256ae 10
bogdanm 20:4263a77256ae 11 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 20:4263a77256ae 12 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 20:4263a77256ae 13 uint32_t i;
bogdanm 20:4263a77256ae 14
bogdanm 20:4263a77256ae 15 // Copy and switch to dynamic vectors if the first time called
bogdanm 20:4263a77256ae 16 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
bogdanm 20:4263a77256ae 17 uint32_t *old_vectors = vectors;
bogdanm 20:4263a77256ae 18 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 20:4263a77256ae 19 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 20:4263a77256ae 20 vectors[i] = old_vectors[i];
bogdanm 20:4263a77256ae 21 }
bogdanm 20:4263a77256ae 22 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 20:4263a77256ae 23 }
bogdanm 20:4263a77256ae 24 vectors[IRQn + 16] = vector;
bogdanm 20:4263a77256ae 25 }
bogdanm 20:4263a77256ae 26
bogdanm 20:4263a77256ae 27 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 20:4263a77256ae 28 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 20:4263a77256ae 29 return vectors[IRQn + 16];
bogdanm 20:4263a77256ae 30 }
bogdanm 20:4263a77256ae 31