Ermanno Brusadin / mbed

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targets/cmsis/TARGET_Freescale/TARGET_K20D50M/cmsis_nvic.c@0:6bc4ac881c8e, 2016-07-28 (annotated)

Committer:
ebrus
Date:
Thu Jul 28 15:56:34 2016 +0000
Revision:
0:6bc4ac881c8e
1;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ebrus 0:6bc4ac881c8e 1 /* mbed Microcontroller Library - cmsis_nvic for LPC11U24
ebrus 0:6bc4ac881c8e 2 * Copyright (c) 2011 ARM Limited. All rights reserved.
ebrus 0:6bc4ac881c8e 3 *
ebrus 0:6bc4ac881c8e 4 * CMSIS-style functionality to support dynamic vectors
ebrus 0:6bc4ac881c8e 5 */
ebrus 0:6bc4ac881c8e 6 #include "cmsis_nvic.h"
ebrus 0:6bc4ac881c8e 7
ebrus 0:6bc4ac881c8e 8 #define NVIC_RAM_VECTOR_ADDRESS (0x1FFFE000) // Vectors positioned at start of RAM
ebrus 0:6bc4ac881c8e 9 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
ebrus 0:6bc4ac881c8e 10
ebrus 0:6bc4ac881c8e 11 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
ebrus 0:6bc4ac881c8e 12 uint32_t *vectors = (uint32_t*)SCB->VTOR;
ebrus 0:6bc4ac881c8e 13 uint32_t i;
ebrus 0:6bc4ac881c8e 14
ebrus 0:6bc4ac881c8e 15 // Copy and switch to dynamic vectors if the first time called
ebrus 0:6bc4ac881c8e 16 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
ebrus 0:6bc4ac881c8e 17 uint32_t *old_vectors = vectors;
ebrus 0:6bc4ac881c8e 18 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
ebrus 0:6bc4ac881c8e 19 for (i=0; i<NVIC_NUM_VECTORS; i++) {
ebrus 0:6bc4ac881c8e 20 vectors[i] = old_vectors[i];
ebrus 0:6bc4ac881c8e 21 }
ebrus 0:6bc4ac881c8e 22 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
ebrus 0:6bc4ac881c8e 23 }
ebrus 0:6bc4ac881c8e 24 vectors[IRQn + 16] = vector;
ebrus 0:6bc4ac881c8e 25 }
ebrus 0:6bc4ac881c8e 26
ebrus 0:6bc4ac881c8e 27 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
ebrus 0:6bc4ac881c8e 28 uint32_t *vectors = (uint32_t*)SCB->VTOR;
ebrus 0:6bc4ac881c8e 29 return vectors[IRQn + 16];
ebrus 0:6bc4ac881c8e 30 }