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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_Atmel/TARGET_SAM21/TARGET_SAMD21J18A/cmsis_nvic.c@579:53297373a894, 2015-07-01 (annotated)

Committer:
mbed_official
Date:
Wed Jul 01 09:45:11 2015 +0100
Revision:
579:53297373a894
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081



Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/



Initial version of drivers for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 579:53297373a894 1 /* mbed Microcontroller Library
mbed_official 579:53297373a894 2 * CMSIS-style functionality to support dynamic vectors
mbed_official 579:53297373a894 3 *******************************************************************************
mbed_official 579:53297373a894 4 * Copyright (c) 2011 ARM Limited. All rights reserved.
mbed_official 579:53297373a894 5 * All rights reserved.
mbed_official 579:53297373a894 6 *
mbed_official 579:53297373a894 7 * Redistribution and use in source and binary forms, with or without
mbed_official 579:53297373a894 8 * modification, are permitted provided that the following conditions are met:
mbed_official 579:53297373a894 9 *
mbed_official 579:53297373a894 10 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 579:53297373a894 11 * this list of conditions and the following disclaimer.
mbed_official 579:53297373a894 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 579:53297373a894 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 579:53297373a894 14 * and/or other materials provided with the distribution.
mbed_official 579:53297373a894 15 * 3. Neither the name of ARM Limited nor the names of its contributors
mbed_official 579:53297373a894 16 * may be used to endorse or promote products derived from this software
mbed_official 579:53297373a894 17 * without specific prior written permission.
mbed_official 579:53297373a894 18 *
mbed_official 579:53297373a894 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 579:53297373a894 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 579:53297373a894 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 579:53297373a894 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 579:53297373a894 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 579:53297373a894 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 579:53297373a894 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 579:53297373a894 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 579:53297373a894 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 579:53297373a894 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 579:53297373a894 29 *******************************************************************************
mbed_official 579:53297373a894 30 */
mbed_official 579:53297373a894 31 #include "cmsis_nvic.h"
mbed_official 579:53297373a894 32
mbed_official 579:53297373a894 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
mbed_official 579:53297373a894 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
mbed_official 579:53297373a894 35
mbed_official 579:53297373a894 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector)
mbed_official 579:53297373a894 37 {
mbed_official 579:53297373a894 38 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 579:53297373a894 39 uint32_t i;
mbed_official 579:53297373a894 40
mbed_official 579:53297373a894 41 // Copy and switch to dynamic vectors if the first time called
mbed_official 579:53297373a894 42 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 579:53297373a894 43 uint32_t *old_vectors = vectors;
mbed_official 579:53297373a894 44 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 579:53297373a894 45 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 579:53297373a894 46 vectors[i] = old_vectors[i];
mbed_official 579:53297373a894 47 }
mbed_official 579:53297373a894 48 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 579:53297373a894 49 }
mbed_official 579:53297373a894 50 vectors[IRQn + 16] = vector;
mbed_official 579:53297373a894 51 }
mbed_official 579:53297373a894 52
mbed_official 579:53297373a894 53 uint32_t NVIC_GetVector(IRQn_Type IRQn)
mbed_official 579:53297373a894 54 {
mbed_official 579:53297373a894 55 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 579:53297373a894 56 return vectors[IRQn + 16];
mbed_official 579:53297373a894 57 }