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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_NXP/TARGET_LPC43XX/cmsis_nvic.c@20:4263a77256ae, 2013-09-10 (annotated)

Committer:
bogdanm
Date:
Tue Sep 10 15:14:19 2013 +0300
Revision:
20:4263a77256ae
Child:
358:9d7ef901f004
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 LCP43xx
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 (0x10000000) // Location of vectors in RAM
bogdanm 20:4263a77256ae 9
bogdanm 20:4263a77256ae 10 // The LPC43xx can boot from multiple memories (internal Flash, external NOR,
bogdanm 20:4263a77256ae 11 // external SPIFI) so we don't know the initial value of VTOR. Thus we use
bogdanm 20:4263a77256ae 12 // a variable to keep track if the vector table was relocated or not
bogdanm 20:4263a77256ae 13 static unsigned char vtor_relocated;
bogdanm 20:4263a77256ae 14
bogdanm 20:4263a77256ae 15 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 20:4263a77256ae 16 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 20:4263a77256ae 17 uint32_t i;
bogdanm 20:4263a77256ae 18
bogdanm 20:4263a77256ae 19 // Copy and switch to dynamic vectors if first time called
bogdanm 20:4263a77256ae 20 if (!vtor_relocated) {
bogdanm 20:4263a77256ae 21 uint32_t *old_vectors = vectors;
bogdanm 20:4263a77256ae 22 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 20:4263a77256ae 23 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 20:4263a77256ae 24 vectors[i] = old_vectors[i];
bogdanm 20:4263a77256ae 25 }
bogdanm 20:4263a77256ae 26 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 20:4263a77256ae 27 vtor_relocated = 1;
bogdanm 20:4263a77256ae 28 }
bogdanm 20:4263a77256ae 29 vectors[IRQn + 16] = vector;
bogdanm 20:4263a77256ae 30 }
bogdanm 20:4263a77256ae 31
bogdanm 20:4263a77256ae 32 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 20:4263a77256ae 33 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 20:4263a77256ae 34 return vectors[IRQn + 16];
bogdanm 20:4263a77256ae 35 }
bogdanm 20:4263a77256ae 36