Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/BusIn.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 "BusIn.h"
<> 144:ef7eb2e8f9f7 17 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 namespace mbed {
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 BusIn::BusIn(PinName p0, PinName p1, PinName p2, PinName p3, PinName p4, PinName p5, PinName p6, PinName p7, PinName p8, PinName p9, PinName p10, PinName p11, PinName p12, PinName p13, PinName p14, PinName p15) {
<> 144:ef7eb2e8f9f7 22 PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 // No lock needed in the constructor
<> 144:ef7eb2e8f9f7 25 _nc_mask = 0;
<> 144:ef7eb2e8f9f7 26 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 27 _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0;
<> 144:ef7eb2e8f9f7 28 if (pins[i] != NC) {
<> 144:ef7eb2e8f9f7 29 _nc_mask |= (1 << i);
<> 144:ef7eb2e8f9f7 30 }
<> 144:ef7eb2e8f9f7 31 }
<> 144:ef7eb2e8f9f7 32 }
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 BusIn::BusIn(PinName pins[16]) {
<> 144:ef7eb2e8f9f7 35 // No lock needed in the constructor
<> 144:ef7eb2e8f9f7 36 _nc_mask = 0;
<> 144:ef7eb2e8f9f7 37 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 38 _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0;
<> 144:ef7eb2e8f9f7 39 if (pins[i] != NC) {
<> 144:ef7eb2e8f9f7 40 _nc_mask |= (1 << i);
<> 144:ef7eb2e8f9f7 41 }
<> 144:ef7eb2e8f9f7 42 }
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 BusIn::~BusIn() {
<> 144:ef7eb2e8f9f7 46 // No lock needed in the destructor
<> 144:ef7eb2e8f9f7 47 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 48 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 49 delete _pin[i];
<> 144:ef7eb2e8f9f7 50 }
<> 144:ef7eb2e8f9f7 51 }
<> 144:ef7eb2e8f9f7 52 }
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 int BusIn::read() {
<> 144:ef7eb2e8f9f7 55 int v = 0;
<> 144:ef7eb2e8f9f7 56 lock();
<> 144:ef7eb2e8f9f7 57 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 58 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 59 v |= _pin[i]->read() << i;
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61 }
<> 144:ef7eb2e8f9f7 62 unlock();
<> 144:ef7eb2e8f9f7 63 return v;
<> 144:ef7eb2e8f9f7 64 }
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 void BusIn::mode(PinMode pull) {
<> 144:ef7eb2e8f9f7 67 lock();
<> 144:ef7eb2e8f9f7 68 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 69 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 70 _pin[i]->mode(pull);
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73 unlock();
<> 144:ef7eb2e8f9f7 74 }
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 void BusIn::lock() {
<> 144:ef7eb2e8f9f7 77 _mutex.lock();
<> 144:ef7eb2e8f9f7 78 }
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 void BusIn::unlock() {
<> 144:ef7eb2e8f9f7 81 _mutex.unlock();
<> 144:ef7eb2e8f9f7 82 }
<> 144:ef7eb2e8f9f7 83
<> 144:ef7eb2e8f9f7 84 BusIn::operator int() {
<> 144:ef7eb2e8f9f7 85 // Underlying read is thread safe
<> 144:ef7eb2e8f9f7 86 return read();
<> 144:ef7eb2e8f9f7 87 }
<> 144:ef7eb2e8f9f7 88
<> 144:ef7eb2e8f9f7 89 DigitalIn& BusIn::operator[] (int index) {
<> 144:ef7eb2e8f9f7 90 // No lock needed since _pin is not modified outside the constructor
<> 144:ef7eb2e8f9f7 91 MBED_ASSERT(index >= 0 && index <= 16);
<> 144:ef7eb2e8f9f7 92 MBED_ASSERT(_pin[index]);
<> 144:ef7eb2e8f9f7 93 return *_pin[index];
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 } // namespace mbed