zain aftab / mbed-src3

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Dependents:   RPC_Serial_V_mac

targets/cmsis/TARGET_Freescale/TARGET_K20XX/TARGET_TEENSY3_1/cmsis_nvic.c@446:3312ed629f01, 2015-01-15 (annotated)

Committer:
mbed_official
Date:
Thu Jan 15 19:30:07 2015 +0000
Revision:
446:3312ed629f01
Synchronized with git revision e21c65041d9a718f866ed6438e5791b13f9c6d91



Full URL: https://github.com/mbedmicro/mbed/commit/e21c65041d9a718f866ed6438e5791b13f9c6d91/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 446:3312ed629f01 1 /* mbed Microcontroller Library
mbed_official 446:3312ed629f01 2 * CMSIS-style functionality to support dynamic vectors
mbed_official 446:3312ed629f01 3 *******************************************************************************
mbed_official 446:3312ed629f01 4 * Copyright (c) 2012 ARM Limited. All rights reserved.
mbed_official 446:3312ed629f01 5 * All rights reserved.
mbed_official 446:3312ed629f01 6 *
mbed_official 446:3312ed629f01 7 * Redistribution and use in source and binary forms, with or without
mbed_official 446:3312ed629f01 8 * modification, are permitted provided that the following conditions are met:
mbed_official 446:3312ed629f01 9 *
mbed_official 446:3312ed629f01 10 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 446:3312ed629f01 11 * this list of conditions and the following disclaimer.
mbed_official 446:3312ed629f01 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 446:3312ed629f01 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 446:3312ed629f01 14 * and/or other materials provided with the distribution.
mbed_official 446:3312ed629f01 15 * 3. Neither the name of ARM Limited nor the names of its contributors
mbed_official 446:3312ed629f01 16 * may be used to endorse or promote products derived from this software
mbed_official 446:3312ed629f01 17 * without specific prior written permission.
mbed_official 446:3312ed629f01 18 *
mbed_official 446:3312ed629f01 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 446:3312ed629f01 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 446:3312ed629f01 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 446:3312ed629f01 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 446:3312ed629f01 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 446:3312ed629f01 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 446:3312ed629f01 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 446:3312ed629f01 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 446:3312ed629f01 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 446:3312ed629f01 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 446:3312ed629f01 29 *******************************************************************************
mbed_official 446:3312ed629f01 30 */
mbed_official 446:3312ed629f01 31 #include "cmsis_nvic.h"
mbed_official 446:3312ed629f01 32
mbed_official 446:3312ed629f01 33 #define NVIC_RAM_VECTOR_ADDRESS (0x1FFF8000) // Vectors positioned at start of RAM
mbed_official 446:3312ed629f01 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
mbed_official 446:3312ed629f01 35
mbed_official 446:3312ed629f01 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
mbed_official 446:3312ed629f01 37 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 446:3312ed629f01 38 uint32_t i;
mbed_official 446:3312ed629f01 39
mbed_official 446:3312ed629f01 40 // Copy and switch to dynamic vectors if the first time called
mbed_official 446:3312ed629f01 41 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 446:3312ed629f01 42 uint32_t *old_vectors = vectors;
mbed_official 446:3312ed629f01 43 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 446:3312ed629f01 44 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 446:3312ed629f01 45 vectors[i] = old_vectors[i];
mbed_official 446:3312ed629f01 46 }
mbed_official 446:3312ed629f01 47 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 446:3312ed629f01 48 }
mbed_official 446:3312ed629f01 49 vectors[IRQn + 16] = vector;
mbed_official 446:3312ed629f01 50 }
mbed_official 446:3312ed629f01 51
mbed_official 446:3312ed629f01 52 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
mbed_official 446:3312ed629f01 53 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 446:3312ed629f01 54 return vectors[IRQn + 16];
mbed_official 446:3312ed629f01 55 }