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mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_NXP/TARGET_LPC81X/cmsis_nvic.c@46:bebbbd80dd87, 2013-11-11 (annotated)

Committer:
mbed_official
Date:
Mon Nov 11 13:30:09 2013 +0000
Revision:
46:bebbbd80dd87
Child:
358:9d7ef901f004
Synchronized with git revision b2733e9b9af906952b295cd6abcf916bf79780ab

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 46:bebbbd80dd87 1 /* mbed Microcontroller Library - cmsis_nvic for LPC11U24
mbed_official 46:bebbbd80dd87 2 * Copyright (c) 2011 ARM Limited. All rights reserved.
mbed_official 46:bebbbd80dd87 3 *
mbed_official 46:bebbbd80dd87 4 * CMSIS-style functionality to support dynamic vectors
mbed_official 46:bebbbd80dd87 5 */
mbed_official 46:bebbbd80dd87 6 #include "cmsis_nvic.h"
mbed_official 46:bebbbd80dd87 7
mbed_official 46:bebbbd80dd87 8 #define NVIC_RAM_VECTOR_ADDRESS (0x10000000) // Vectors positioned at start of RAM
mbed_official 46:bebbbd80dd87 9 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
mbed_official 46:bebbbd80dd87 10
mbed_official 46:bebbbd80dd87 11 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
mbed_official 46:bebbbd80dd87 12 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 46:bebbbd80dd87 13 uint32_t i;
mbed_official 46:bebbbd80dd87 14
mbed_official 46:bebbbd80dd87 15 // Copy and switch to dynamic vectors if the first time called
mbed_official 46:bebbbd80dd87 16 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 46:bebbbd80dd87 17 uint32_t *old_vectors = vectors;
mbed_official 46:bebbbd80dd87 18 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 46:bebbbd80dd87 19 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 46:bebbbd80dd87 20 vectors[i] = old_vectors[i];
mbed_official 46:bebbbd80dd87 21 }
mbed_official 46:bebbbd80dd87 22 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 46:bebbbd80dd87 23 }
mbed_official 46:bebbbd80dd87 24 vectors[IRQn + 16] = vector;
mbed_official 46:bebbbd80dd87 25 }
mbed_official 46:bebbbd80dd87 26
mbed_official 46:bebbbd80dd87 27 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
mbed_official 46:bebbbd80dd87 28 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 46:bebbbd80dd87 29 return vectors[IRQn + 16];
mbed_official 46:bebbbd80dd87 30 }