lzbp li / mbed-src

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targets/cmsis/TARGET_NXP/TARGET_LPC176X/cmsis_nvic.c@183:46ae3190e86c, 2014-05-07 (annotated)

Committer:
mbed_official
Date:
Wed May 07 17:45:07 2014 +0100
Revision:
183:46ae3190e86c
Parent:
15:4892fe388435
Child:
358:9d7ef901f004
Synchronized with git revision 152b58673f64d18174038282d90ca97e67d44ae2



Full URL: https://github.com/mbedmicro/mbed/commit/152b58673f64d18174038282d90ca97e67d44ae2/



Ensure the NVIC table gets copied to RAM even when it is not at 0x0000

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library - cmsis_nvic for LCP1768
bogdanm 13:0645d8841f51 2 * Copyright (c) 2009-2011 ARM Limited. All rights reserved.
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * CMSIS-style functionality to support dynamic vectors
bogdanm 13:0645d8841f51 5 */
bogdanm 13:0645d8841f51 6 #include "cmsis_nvic.h"
bogdanm 13:0645d8841f51 7
bogdanm 13:0645d8841f51 8 #define NVIC_RAM_VECTOR_ADDRESS (0x10000000) // Location of vectors in RAM
bogdanm 13:0645d8841f51 9 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
bogdanm 13:0645d8841f51 10
bogdanm 13:0645d8841f51 11 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 13:0645d8841f51 12 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 13:0645d8841f51 13 uint32_t i;
bogdanm 13:0645d8841f51 14
bogdanm 13:0645d8841f51 15 // Copy and switch to dynamic vectors if the first time called
mbed_official 183:46ae3190e86c 16 if (SCB->VTOR < NVIC_RAM_VECTOR_ADDRESS) {
bogdanm 13:0645d8841f51 17 uint32_t *old_vectors = vectors;
bogdanm 13:0645d8841f51 18 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 13:0645d8841f51 19 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 13:0645d8841f51 20 vectors[i] = old_vectors[i];
bogdanm 13:0645d8841f51 21 }
bogdanm 13:0645d8841f51 22 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 13:0645d8841f51 23 }
bogdanm 15:4892fe388435 24 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
bogdanm 13:0645d8841f51 25 }
bogdanm 13:0645d8841f51 26
bogdanm 13:0645d8841f51 27 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 13:0645d8841f51 28 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 15:4892fe388435 29 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
bogdanm 13:0645d8841f51 30 }
bogdanm 13:0645d8841f51 31