Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F7/TARGET_DISCO_F746NG/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 * CMSIS-style functionality to support dynamic vectors
<> 144:ef7eb2e8f9f7 3 *******************************************************************************
<> 144:ef7eb2e8f9f7 4 * Copyright (c) 2016, STMicroelectronics
<> 144:ef7eb2e8f9f7 5 * All rights reserved.
<> 144:ef7eb2e8f9f7 6 *
<> 144:ef7eb2e8f9f7 7 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 8 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 11 * this list of conditions and the following disclaimer.
<> 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 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 16 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 17 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 18 *
<> 144:ef7eb2e8f9f7 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 29 *******************************************************************************
<> 144:ef7eb2e8f9f7 30 */
<> 144:ef7eb2e8f9f7 31 #include "cmsis_nvic.h"
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
<> 144:ef7eb2e8f9f7 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x08000000) // Initial vector position in flash
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
<> 144:ef7eb2e8f9f7 37 uint32_t *vectors = (uint32_t *)SCB->VTOR;
<> 144:ef7eb2e8f9f7 38 uint32_t i;
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 // Copy and switch to dynamic vectors if the first time called
<> 144:ef7eb2e8f9f7 41 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
<> 144:ef7eb2e8f9f7 42 uint32_t *old_vectors = vectors;
<> 144:ef7eb2e8f9f7 43 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
<> 144:ef7eb2e8f9f7 44 for (i=0; i<NVIC_NUM_VECTORS; i++) {
<> 144:ef7eb2e8f9f7 45 vectors[i] = old_vectors[i];
<> 144:ef7eb2e8f9f7 46 }
<> 144:ef7eb2e8f9f7 47 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
<> 144:ef7eb2e8f9f7 48 }
<> 144:ef7eb2e8f9f7 49 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
<> 144:ef7eb2e8f9f7 50 }
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
<> 144:ef7eb2e8f9f7 53 uint32_t *vectors = (uint32_t*)SCB->VTOR;
<> 144:ef7eb2e8f9f7 54 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
<> 144:ef7eb2e8f9f7 55 }