mbed library sources
Fork of mbed-src by
targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_BEID/cmsis_nvic.c
- Committer:
- lzbpli
- Date:
- 2016-07-07
- Revision:
- 636:b0d178e9fa10
- Parent:
- 624:83778a75d1b4
File content as of revision 636:b0d178e9fa10:
/* mbed Microcontroller Library - cmsis_nvic for LCP1768 * Copyright (c) 2009-2011 ARM Limited. All rights reserved. * * CMSIS-style functionality to support dynamic vectors */ #include "cmsis_nvic.h" #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM #define NVIC_FLASH_VECTOR_ADDRESS (0x00000000) // Initial vector position in flash void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) { uint32_t *vectors = (uint32_t*)SCB->VTOR; uint32_t i; // Copy and switch to dynamic vectors if the first time called if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) { uint32_t *old_vectors = vectors; vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS; for (i=0; i<NVIC_NUM_VECTORS; i++) { vectors[i] = old_vectors[i]; } SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS; } vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector; } uint32_t NVIC_GetVector(IRQn_Type IRQn) { uint32_t *vectors = (uint32_t*)SCB->VTOR; return vectors[IRQn + NVIC_USER_IRQ_OFFSET]; }