Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_Atmel/TARGET_SAM_CortexM0P/TARGET_SAML21/cmsis_nvic.c@18:da299f395b9e, 2015-11-09 (annotated)

Committer:
mbed_official
Date:
Mon Nov 09 13:30:11 2015 +0000
Revision:
18:da299f395b9e
Synchronized with git revision f605825f66bb2e462ff7dbc5fb4ed2dbe979d1c3



Full URL: https://github.com/mbedmicro/mbed/commit/f605825f66bb2e462ff7dbc5fb4ed2dbe979d1c3/



Added support for SAML21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 18:da299f395b9e 1 /* mbed Microcontroller Library
mbed_official 18:da299f395b9e 2 * CMSIS-style functionality to support dynamic vectors
mbed_official 18:da299f395b9e 3 *******************************************************************************
mbed_official 18:da299f395b9e 4 * Copyright (c) 2011 ARM Limited. All rights reserved.
mbed_official 18:da299f395b9e 5 * All rights reserved.
mbed_official 18:da299f395b9e 6 *
mbed_official 18:da299f395b9e 7 * Redistribution and use in source and binary forms, with or without
mbed_official 18:da299f395b9e 8 * modification, are permitted provided that the following conditions are met:
mbed_official 18:da299f395b9e 9 *
mbed_official 18:da299f395b9e 10 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 18:da299f395b9e 11 * this list of conditions and the following disclaimer.
mbed_official 18:da299f395b9e 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 18:da299f395b9e 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 18:da299f395b9e 14 * and/or other materials provided with the distribution.
mbed_official 18:da299f395b9e 15 * 3. Neither the name of ARM Limited nor the names of its contributors
mbed_official 18:da299f395b9e 16 * may be used to endorse or promote products derived from this software
mbed_official 18:da299f395b9e 17 * without specific prior written permission.
mbed_official 18:da299f395b9e 18 *
mbed_official 18:da299f395b9e 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 18:da299f395b9e 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 18:da299f395b9e 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 18:da299f395b9e 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 18:da299f395b9e 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 18:da299f395b9e 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 18:da299f395b9e 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 18:da299f395b9e 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 18:da299f395b9e 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 18:da299f395b9e 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 18:da299f395b9e 29 *******************************************************************************
mbed_official 18:da299f395b9e 30 */
mbed_official 18:da299f395b9e 31 #include "cmsis_nvic.h"
mbed_official 18:da299f395b9e 32
mbed_official 18:da299f395b9e 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
mbed_official 18:da299f395b9e 34 //extern uint32_t _sdvectors;
mbed_official 18:da299f395b9e 35 #define NVIC_FLASH_VECTOR_ADDRESS (0x0) // Initial vector position in flash
mbed_official 18:da299f395b9e 36
mbed_official 18:da299f395b9e 37 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector)
mbed_official 18:da299f395b9e 38 {
mbed_official 18:da299f395b9e 39 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 18:da299f395b9e 40 uint32_t i;
mbed_official 18:da299f395b9e 41
mbed_official 18:da299f395b9e 42 // Copy and switch to dynamic vectors if the first time called
mbed_official 18:da299f395b9e 43 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 18:da299f395b9e 44 uint32_t *old_vectors = vectors;
mbed_official 18:da299f395b9e 45 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 18:da299f395b9e 46 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 18:da299f395b9e 47 vectors[i] = old_vectors[i];
mbed_official 18:da299f395b9e 48 }
mbed_official 18:da299f395b9e 49 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 18:da299f395b9e 50 }
mbed_official 18:da299f395b9e 51 vectors[IRQn + 16] = vector;
mbed_official 18:da299f395b9e 52 }
mbed_official 18:da299f395b9e 53
mbed_official 18:da299f395b9e 54 uint32_t NVIC_GetVector(IRQn_Type IRQn)
mbed_official 18:da299f395b9e 55 {
mbed_official 18:da299f395b9e 56 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 18:da299f395b9e 57 return vectors[IRQn + 16];
mbed_official 18:da299f395b9e 58 }