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_BEETLE/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 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015-2016 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 /*
<> 144:ef7eb2e8f9f7 17 * CMSIS-style functionality to support dynamic vectors
<> 144:ef7eb2e8f9f7 18 */
<> 144:ef7eb2e8f9f7 19 #include "cmsis_nvic.h"
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) //Location of vectors in RAM
<> 144:ef7eb2e8f9f7 22 #define NVIC_FLASH_VECTOR_ADDRESS (0x00000000) //Initial vector position in flash
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
<> 144:ef7eb2e8f9f7 25 uint32_t *vectors = (uint32_t*)SCB->VTOR;
<> 144:ef7eb2e8f9f7 26 uint32_t i;
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 // Copy and switch to dynamic vectors if the first time called
<> 144:ef7eb2e8f9f7 29 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
<> 144:ef7eb2e8f9f7 30 uint32_t *old_vectors = vectors;
<> 144:ef7eb2e8f9f7 31 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
<> 144:ef7eb2e8f9f7 32 for (i=0; i<NVIC_NUM_VECTORS; i++) {
<> 144:ef7eb2e8f9f7 33 vectors[i] = old_vectors[i];
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
<> 144:ef7eb2e8f9f7 36 }
<> 144:ef7eb2e8f9f7 37 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
<> 144:ef7eb2e8f9f7 38 }
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
<> 144:ef7eb2e8f9f7 41 uint32_t *vectors = (uint32_t*)SCB->VTOR;
<> 144:ef7eb2e8f9f7 42 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
<> 144:ef7eb2e8f9f7 43 }