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_M4/cmsis_nvic.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* MPS2 CMSIS Library
<> 144:ef7eb2e8f9f7 2 *
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2006-2016 ARM Limited
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 *
<> 144:ef7eb2e8f9f7 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 13 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 14 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 15 *
<> 144:ef7eb2e8f9f7 16 * 3. Neither the name of the copyright holder nor the names of its contributors
<> 144:ef7eb2e8f9f7 17 * may be used to endorse or promote products derived from this software without
<> 144:ef7eb2e8f9f7 18 * specific prior written permission.
<> 144:ef7eb2e8f9f7 19 *
<> 144:ef7eb2e8f9f7 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
<> 144:ef7eb2e8f9f7 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
<> 144:ef7eb2e8f9f7 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
<> 144:ef7eb2e8f9f7 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
<> 144:ef7eb2e8f9f7 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
<> 144:ef7eb2e8f9f7 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
<> 144:ef7eb2e8f9f7 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
<> 144:ef7eb2e8f9f7 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
<> 144:ef7eb2e8f9f7 30 * POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 31 *******************************************************************************
<> 144:ef7eb2e8f9f7 32 * CMSIS-style functionality to support dynamic vectors
<> 144:ef7eb2e8f9f7 33 *******************************************************************************/
<> 144:ef7eb2e8f9f7 34 #include "cmsis_nvic.h"
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM
<> 144:ef7eb2e8f9f7 37 #define NVIC_FLASH_VECTOR_ADDRESS (0x00000000) // Initial vector position in flash
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
<> 144:ef7eb2e8f9f7 40 uint32_t *vectors = (uint32_t*)SCB->VTOR;
<> 144:ef7eb2e8f9f7 41 uint32_t i;
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 // Copy and switch to dynamic vectors if the first time called
<> 144:ef7eb2e8f9f7 44 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
<> 144:ef7eb2e8f9f7 45 uint32_t *old_vectors = vectors;
<> 144:ef7eb2e8f9f7 46 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
<> 144:ef7eb2e8f9f7 47 for (i=0; i<NVIC_NUM_VECTORS; i++) {
<> 144:ef7eb2e8f9f7 48 vectors[i] = old_vectors[i];
<> 144:ef7eb2e8f9f7 49 }
<> 144:ef7eb2e8f9f7 50 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
<> 144:ef7eb2e8f9f7 51 }
<> 144:ef7eb2e8f9f7 52 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
<> 144:ef7eb2e8f9f7 56 uint32_t *vectors = (uint32_t*)SCB->VTOR;
<> 144:ef7eb2e8f9f7 57 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
<> 144:ef7eb2e8f9f7 58 }