lzbp li / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_NXP/TARGET_LPC82X/cmsis_nvic.c@337:6ed01c00b962, 2014-10-06 (annotated)

Committer:
mbed_official
Date:
Mon Oct 06 10:00:08 2014 +0100
Revision:
337:6ed01c00b962
Child:
358:9d7ef901f004
Synchronized with git revision b30176a071a49d95914b97d2ab98240f3a1e2cae



Full URL: https://github.com/mbedmicro/mbed/commit/b30176a071a49d95914b97d2ab98240f3a1e2cae/



Platform: LPC824 - new platform addition

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 337:6ed01c00b962 1 /* mbed Microcontroller Library - cmsis_nvic for LPC11U24
mbed_official 337:6ed01c00b962 2 * Copyright (c) 2011 ARM Limited. All rights reserved.
mbed_official 337:6ed01c00b962 3 *
mbed_official 337:6ed01c00b962 4 * CMSIS-style functionality to support dynamic vectors
mbed_official 337:6ed01c00b962 5 */
mbed_official 337:6ed01c00b962 6 #include "cmsis_nvic.h"
mbed_official 337:6ed01c00b962 7
mbed_official 337:6ed01c00b962 8 #define NVIC_RAM_VECTOR_ADDRESS (0x10000000) // Vectors positioned at start of RAM
mbed_official 337:6ed01c00b962 9 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
mbed_official 337:6ed01c00b962 10
mbed_official 337:6ed01c00b962 11 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
mbed_official 337:6ed01c00b962 12 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 337:6ed01c00b962 13 uint32_t i;
mbed_official 337:6ed01c00b962 14
mbed_official 337:6ed01c00b962 15 // Copy and switch to dynamic vectors if the first time called
mbed_official 337:6ed01c00b962 16 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 337:6ed01c00b962 17 uint32_t *old_vectors = vectors;
mbed_official 337:6ed01c00b962 18 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 337:6ed01c00b962 19 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 337:6ed01c00b962 20 vectors[i] = old_vectors[i];
mbed_official 337:6ed01c00b962 21 }
mbed_official 337:6ed01c00b962 22 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 337:6ed01c00b962 23 }
mbed_official 337:6ed01c00b962 24 vectors[IRQn + 16] = vector;
mbed_official 337:6ed01c00b962 25 }
mbed_official 337:6ed01c00b962 26
mbed_official 337:6ed01c00b962 27 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
mbed_official 337:6ed01c00b962 28 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 337:6ed01c00b962 29 return vectors[IRQn + 16];
mbed_official 337:6ed01c00b962 30 }