marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F446RE/cmsis_nvic.c@613:bc40b8d2aec4, 2015-08-20 (annotated)

Committer:
mbed_official
Date:
Thu Aug 20 10:45:13 2015 +0100
Revision:
613:bc40b8d2aec4
Parent:
553:063b9f2f393c 
Synchronized with git revision 92ca8c7b60a283b6bb60eb65b183dac1599f0ade



Full URL: https://github.com/mbedmicro/mbed/commit/92ca8c7b60a283b6bb60eb65b183dac1599f0ade/



Nordic: update application start address in GCC linker script

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 553:063b9f2f393c 1 /* mbed Microcontroller Library
mbed_official 553:063b9f2f393c 2 * CMSIS-style functionality to support dynamic vectors
mbed_official 553:063b9f2f393c 3 *******************************************************************************
mbed_official 613:bc40b8d2aec4 4 * Copyright (c) 2015, STMicroelectronics
mbed_official 553:063b9f2f393c 5 * All rights reserved.
mbed_official 553:063b9f2f393c 6 *
mbed_official 553:063b9f2f393c 7 * Redistribution and use in source and binary forms, with or without
mbed_official 553:063b9f2f393c 8 * modification, are permitted provided that the following conditions are met:
mbed_official 553:063b9f2f393c 9 *
mbed_official 553:063b9f2f393c 10 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 553:063b9f2f393c 11 * this list of conditions and the following disclaimer.
mbed_official 553:063b9f2f393c 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 553:063b9f2f393c 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 553:063b9f2f393c 14 * and/or other materials provided with the distribution.
mbed_official 553:063b9f2f393c 15 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 553:063b9f2f393c 16 * may be used to endorse or promote products derived from this software
mbed_official 553:063b9f2f393c 17 * without specific prior written permission.
mbed_official 553:063b9f2f393c 18 *
mbed_official 553:063b9f2f393c 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 553:063b9f2f393c 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 553:063b9f2f393c 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 553:063b9f2f393c 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 553:063b9f2f393c 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 553:063b9f2f393c 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 553:063b9f2f393c 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 553:063b9f2f393c 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 553:063b9f2f393c 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 553:063b9f2f393c 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 553:063b9f2f393c 29 *******************************************************************************
mbed_official 553:063b9f2f393c 30 */
mbed_official 553:063b9f2f393c 31 #include "cmsis_nvic.h"
mbed_official 553:063b9f2f393c 32
mbed_official 553:063b9f2f393c 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
mbed_official 553:063b9f2f393c 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x08000000) // Initial vector position in flash
mbed_official 553:063b9f2f393c 35
mbed_official 553:063b9f2f393c 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
mbed_official 553:063b9f2f393c 37 uint32_t *vectors = (uint32_t *)SCB->VTOR;
mbed_official 553:063b9f2f393c 38 uint32_t i;
mbed_official 553:063b9f2f393c 39
mbed_official 553:063b9f2f393c 40 // Copy and switch to dynamic vectors if the first time called
mbed_official 553:063b9f2f393c 41 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 553:063b9f2f393c 42 uint32_t *old_vectors = vectors;
mbed_official 553:063b9f2f393c 43 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 553:063b9f2f393c 44 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 553:063b9f2f393c 45 vectors[i] = old_vectors[i];
mbed_official 553:063b9f2f393c 46 }
mbed_official 553:063b9f2f393c 47 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 553:063b9f2f393c 48 }
mbed_official 553:063b9f2f393c 49 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
mbed_official 553:063b9f2f393c 50 }
mbed_official 553:063b9f2f393c 51
mbed_official 553:063b9f2f393c 52 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
mbed_official 553:063b9f2f393c 53 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 553:063b9f2f393c 54 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
mbed_official 553:063b9f2f393c 55 }