shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_NUCLEO_L053R8/cmsis_nvic.c@181:a4cbdfbbd2f4, 2014-05-07 (annotated)

Committer:
mbed_official
Date:
Wed May 07 13:15:08 2014 +0100
Revision:
181:a4cbdfbbd2f4
Synchronized with git revision 7751e759576c6fd68deccb81ea82bac19ed41745



Full URL: https://github.com/mbedmicro/mbed/commit/7751e759576c6fd68deccb81ea82bac19ed41745/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 * CMSIS-style functionality to support dynamic vectors
mbed_official 181:a4cbdfbbd2f4 3 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 4 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 5 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 6 *
mbed_official 181:a4cbdfbbd2f4 7 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 8 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 9 *
mbed_official 181:a4cbdfbbd2f4 10 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 11 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 14 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 15 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 16 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 17 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 18 *
mbed_official 181:a4cbdfbbd2f4 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 29 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 30 */
mbed_official 181:a4cbdfbbd2f4 31 #include "cmsis_nvic.h"
mbed_official 181:a4cbdfbbd2f4 32
mbed_official 181:a4cbdfbbd2f4 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
mbed_official 181:a4cbdfbbd2f4 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x08000000) // Initial vector position in flash
mbed_official 181:a4cbdfbbd2f4 35
mbed_official 181:a4cbdfbbd2f4 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
mbed_official 181:a4cbdfbbd2f4 37 uint32_t *vectors = (uint32_t *)SCB->VTOR;
mbed_official 181:a4cbdfbbd2f4 38 uint32_t i;
mbed_official 181:a4cbdfbbd2f4 39
mbed_official 181:a4cbdfbbd2f4 40 // Copy and switch to dynamic vectors if the first time called
mbed_official 181:a4cbdfbbd2f4 41 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 181:a4cbdfbbd2f4 42 uint32_t *old_vectors = vectors;
mbed_official 181:a4cbdfbbd2f4 43 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 181:a4cbdfbbd2f4 44 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 181:a4cbdfbbd2f4 45 vectors[i] = old_vectors[i];
mbed_official 181:a4cbdfbbd2f4 46 }
mbed_official 181:a4cbdfbbd2f4 47 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 181:a4cbdfbbd2f4 48 }
mbed_official 181:a4cbdfbbd2f4 49 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
mbed_official 181:a4cbdfbbd2f4 50 }
mbed_official 181:a4cbdfbbd2f4 51
mbed_official 181:a4cbdfbbd2f4 52 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
mbed_official 181:a4cbdfbbd2f4 53 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 181:a4cbdfbbd2f4 54 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
mbed_official 181:a4cbdfbbd2f4 55 }