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_NUCLEO_F746ZG/cmsis_nvic.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
74:9322579e4309 
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
mbed_official 74:9322579e4309 1 /* mbed Microcontroller Library
mbed_official 74:9322579e4309 2 * CMSIS-style functionality to support dynamic vectors
mbed_official 74:9322579e4309 3 *******************************************************************************
mbed_official 74:9322579e4309 4 * Copyright (c) 2016, STMicroelectronics
mbed_official 74:9322579e4309 5 * All rights reserved.
mbed_official 74:9322579e4309 6 *
mbed_official 74:9322579e4309 7 * Redistribution and use in source and binary forms, with or without
mbed_official 74:9322579e4309 8 * modification, are permitted provided that the following conditions are met:
mbed_official 74:9322579e4309 9 *
mbed_official 74:9322579e4309 10 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 74:9322579e4309 11 * this list of conditions and the following disclaimer.
mbed_official 74:9322579e4309 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 74:9322579e4309 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 74:9322579e4309 14 * and/or other materials provided with the distribution.
mbed_official 74:9322579e4309 15 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 74:9322579e4309 16 * may be used to endorse or promote products derived from this software
mbed_official 74:9322579e4309 17 * without specific prior written permission.
mbed_official 74:9322579e4309 18 *
mbed_official 74:9322579e4309 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 74:9322579e4309 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 74:9322579e4309 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 74:9322579e4309 22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 74:9322579e4309 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 74:9322579e4309 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 74:9322579e4309 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 74:9322579e4309 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 74:9322579e4309 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 74:9322579e4309 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 74:9322579e4309 29 *******************************************************************************
mbed_official 74:9322579e4309 30 */
mbed_official 74:9322579e4309 31 #include "cmsis_nvic.h"
mbed_official 74:9322579e4309 32
mbed_official 74:9322579e4309 33 #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM
mbed_official 74:9322579e4309 34 #define NVIC_FLASH_VECTOR_ADDRESS (0x08000000) // Initial vector position in flash
mbed_official 74:9322579e4309 35
mbed_official 74:9322579e4309 36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
mbed_official 74:9322579e4309 37 uint32_t *vectors = (uint32_t *)SCB->VTOR;
mbed_official 74:9322579e4309 38 uint32_t i;
mbed_official 74:9322579e4309 39
mbed_official 74:9322579e4309 40 // Copy and switch to dynamic vectors if the first time called
mbed_official 74:9322579e4309 41 if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
mbed_official 74:9322579e4309 42 uint32_t *old_vectors = vectors;
mbed_official 74:9322579e4309 43 vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 74:9322579e4309 44 for (i=0; i<NVIC_NUM_VECTORS; i++) {
mbed_official 74:9322579e4309 45 vectors[i] = old_vectors[i];
mbed_official 74:9322579e4309 46 }
mbed_official 74:9322579e4309 47 SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
mbed_official 74:9322579e4309 48 }
mbed_official 74:9322579e4309 49 vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
mbed_official 74:9322579e4309 50 }
mbed_official 74:9322579e4309 51
mbed_official 74:9322579e4309 52 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
mbed_official 74:9322579e4309 53 uint32_t *vectors = (uint32_t*)SCB->VTOR;
mbed_official 74:9322579e4309 54 return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
mbed_official 74:9322579e4309 55 }