Umar Naeem / mbed-dev

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Fork of mbed-dev by Umar Naeem

targets/cmsis/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F031K6/cmsis_nvic.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
43:e3d4af315dd8
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * CMSIS-style functionality to support dynamic vectors
bogdanm 0:9b334a45a8ff 3 *******************************************************************************
bogdanm 0:9b334a45a8ff 4 * Copyright (c) 2015, STMicroelectronics
bogdanm 0:9b334a45a8ff 5 * All rights reserved.
bogdanm 0:9b334a45a8ff 6 *
bogdanm 0:9b334a45a8ff 7 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 8 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 11 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 13 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 14 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 15 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 16 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 17 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 18 *
bogdanm 0:9b334a45a8ff 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 29 *******************************************************************************
bogdanm 0:9b334a45a8ff 30 */
bogdanm 0:9b334a45a8ff 31 #include "cmsis_nvic.h"
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
bogdanm 0:9b334a45a8ff 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x08000000) // Initial vector position in flash
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 0:9b334a45a8ff 37 int i;
bogdanm 0:9b334a45a8ff 38 // To keep track that the vectors remap is done
bogdanm 0:9b334a45a8ff 39 static volatile uint32_t vtor_remap = 0;
bogdanm 0:9b334a45a8ff 40 // Space for dynamic vectors, initialised to allocate in R/W
bogdanm 0:9b334a45a8ff 41 static volatile uint32_t *vectors = (uint32_t *)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 // Copy and switch to dynamic vectors if first time called
bogdanm 0:9b334a45a8ff 44 if (vtor_remap == 0) {
bogdanm 0:9b334a45a8ff 45 uint32_t *old_vectors = (uint32_t *)NVIC_FLASH_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 46 for (i = 0; i < NVIC_NUM_VECTORS; i++) {
bogdanm 0:9b334a45a8ff 47 vectors[i] = old_vectors[i];
bogdanm 0:9b334a45a8ff 48 }
bogdanm 0:9b334a45a8ff 49 SYSCFG->CFGR1 |= 0x03; // Embedded SRAM mapped at 0x00000000
bogdanm 0:9b334a45a8ff 50 vtor_remap = 1; // The vectors remap is done
bogdanm 0:9b334a45a8ff 51 }
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 // Set the vector
bogdanm 0:9b334a45a8ff 54 vectors[IRQn + 16] = vector;
bogdanm 0:9b334a45a8ff 55 }
bogdanm 0:9b334a45a8ff 56
bogdanm 0:9b334a45a8ff 57 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 0:9b334a45a8ff 58 uint32_t *vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 59 // Return the vector
bogdanm 0:9b334a45a8ff 60 return vectors[IRQn + 16];
bogdanm 0:9b334a45a8ff 61 }