Jonathan Piat / mbed-src

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targets/cmsis/TARGET_NXP/TARGET_LPC81X/cmsis_nvic.c@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Child:
15:4892fe388435
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library - cmsis_nvic for LPC11U24
bogdanm 13:0645d8841f51 2 * Copyright (c) 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_NUM_VECTORS (16 + 32) // CORE + MCU Peripherals
bogdanm 13:0645d8841f51 9 #define NVIC_RAM_VECTOR_ADDRESS (0x10000000) // Vectors positioned at start of RAM
bogdanm 13:0645d8841f51 10 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
bogdanm 13:0645d8841f51 11
bogdanm 13:0645d8841f51 12 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 13:0645d8841f51 13 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 13:0645d8841f51 14 uint32_t i;
bogdanm 13:0645d8841f51 15
bogdanm 13:0645d8841f51 16 // Copy and switch to dynamic vectors if the first time called
bogdanm 13:0645d8841f51 17 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
bogdanm 13:0645d8841f51 18 uint32_t *old_vectors = vectors;
bogdanm 13:0645d8841f51 19 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 13:0645d8841f51 20 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 13:0645d8841f51 21 vectors[i] = old_vectors[i];
bogdanm 13:0645d8841f51 22 }
bogdanm 13:0645d8841f51 23 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 13:0645d8841f51 24 }
bogdanm 13:0645d8841f51 25 vectors[IRQn + 16] = vector;
bogdanm 13:0645d8841f51 26 }
bogdanm 13:0645d8841f51 27
bogdanm 13:0645d8841f51 28 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 13:0645d8841f51 29 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 13:0645d8841f51 30 return vectors[IRQn + 16];
bogdanm 13:0645d8841f51 31 }