Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_M3/cmsis_nvic.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
80:bdf1132a57cf
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 /* MPS2 CMSIS Library
bogdanm 0:9b334a45a8ff 2 *
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2006-2015 ARM Limited
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 *
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 *
bogdanm 0:9b334a45a8ff 16 * 3. Neither the name of the copyright holder nor the names of its contributors
bogdanm 0:9b334a45a8ff 17 * may be used to endorse or promote products derived from this software without
bogdanm 0:9b334a45a8ff 18 * specific prior written permission.
bogdanm 0:9b334a45a8ff 19 *
bogdanm 0:9b334a45a8ff 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
bogdanm 0:9b334a45a8ff 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
bogdanm 0:9b334a45a8ff 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
bogdanm 0:9b334a45a8ff 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
bogdanm 0:9b334a45a8ff 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
bogdanm 0:9b334a45a8ff 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
bogdanm 0:9b334a45a8ff 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
bogdanm 0:9b334a45a8ff 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
bogdanm 0:9b334a45a8ff 30 * POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 31 *******************************************************************************
bogdanm 0:9b334a45a8ff 32 * CMSIS-style functionality to support dynamic vectors
bogdanm 0:9b334a45a8ff 33 *******************************************************************************/
bogdanm 0:9b334a45a8ff 34 #include "cmsis_nvic.h"
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM
bogdanm 0:9b334a45a8ff 37 #define NVIC_FLASH_VECTOR_ADDRESS (0x00000000) // Initial vector position in flash
bogdanm 0:9b334a45a8ff 38
bogdanm 0:9b334a45a8ff 39 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
bogdanm 0:9b334a45a8ff 40 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 0:9b334a45a8ff 41 uint32_t i;
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 // Copy and switch to dynamic vectors if the first time called
bogdanm 0:9b334a45a8ff 44 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
bogdanm 0:9b334a45a8ff 45 uint32_t *old_vectors = vectors;
bogdanm 0:9b334a45a8ff 46 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 47 for (i=0; i<NVIC_NUM_VECTORS; i++) {
bogdanm 0:9b334a45a8ff 48 vectors[i] = old_vectors[i];
bogdanm 0:9b334a45a8ff 49 }
bogdanm 0:9b334a45a8ff 50 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
bogdanm 0:9b334a45a8ff 51 }
bogdanm 0:9b334a45a8ff 52 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
bogdanm 0:9b334a45a8ff 53 }
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
bogdanm 0:9b334a45a8ff 56 uint32_t *vectors = (uint32_t*)SCB->VTOR;
bogdanm 0:9b334a45a8ff 57 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
bogdanm 0:9b334a45a8ff 58 }