Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/Ticker.cpp@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) 2006-2013 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 #include "Ticker.h"
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 #include "TimerEvent.h"
<> 144:ef7eb2e8f9f7 19 #include "FunctionPointer.h"
<> 144:ef7eb2e8f9f7 20 #include "ticker_api.h"
<> 144:ef7eb2e8f9f7 21 #include "critical.h"
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 namespace mbed {
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 void Ticker::detach() {
<> 144:ef7eb2e8f9f7 26 core_util_critical_section_enter();
<> 144:ef7eb2e8f9f7 27 remove();
<> 144:ef7eb2e8f9f7 28 _function.attach(0);
<> 144:ef7eb2e8f9f7 29 core_util_critical_section_exit();
<> 144:ef7eb2e8f9f7 30 }
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 void Ticker::setup(timestamp_t t) {
<> 144:ef7eb2e8f9f7 33 core_util_critical_section_enter();
<> 144:ef7eb2e8f9f7 34 remove();
<> 144:ef7eb2e8f9f7 35 _delay = t;
<> 144:ef7eb2e8f9f7 36 insert(_delay + ticker_read(_ticker_data));
<> 144:ef7eb2e8f9f7 37 core_util_critical_section_exit();
<> 144:ef7eb2e8f9f7 38 }
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 void Ticker::handler() {
<> 144:ef7eb2e8f9f7 41 insert(event.timestamp + _delay);
<> 144:ef7eb2e8f9f7 42 _function.call();
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 } // namespace mbed