Chau Vo / mbed-dev

mbed library sources. Supersedes mbed-src. RTC working even after reset

Fork of mbed-dev by mbed official

common/BusOut.cpp@148:161ebc35dc3a, 2016-09-28 (annotated)

Committer:
olympux
Date:
Wed Sep 28 20:59:47 2016 +0000
Revision:
148:161ebc35dc3a
Parent:
144:ef7eb2e8f9f7 
RTC working

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 "BusOut.h"
<> 144:ef7eb2e8f9f7 17 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 namespace mbed {
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 BusOut::BusOut(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 DigitalOut(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 BusOut::BusOut(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 DigitalOut(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 BusOut::~BusOut() {
<> 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 void BusOut::write(int value) {
<> 144:ef7eb2e8f9f7 55 lock();
<> 144:ef7eb2e8f9f7 56 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 57 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 58 _pin[i]->write((value >> i) & 1);
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61 unlock();
<> 144:ef7eb2e8f9f7 62 }
<> 144:ef7eb2e8f9f7 63
<> 144:ef7eb2e8f9f7 64 int BusOut::read() {
<> 144:ef7eb2e8f9f7 65 lock();
<> 144:ef7eb2e8f9f7 66 int v = 0;
<> 144:ef7eb2e8f9f7 67 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 68 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 69 v |= _pin[i]->read() << i;
<> 144:ef7eb2e8f9f7 70 }
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72 unlock();
<> 144:ef7eb2e8f9f7 73 return v;
<> 144:ef7eb2e8f9f7 74 }
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 BusOut& BusOut::operator= (int v) {
<> 144:ef7eb2e8f9f7 77 // Underlying write is thread safe
<> 144:ef7eb2e8f9f7 78 write(v);
<> 144:ef7eb2e8f9f7 79 return *this;
<> 144:ef7eb2e8f9f7 80 }
<> 144:ef7eb2e8f9f7 81
<> 144:ef7eb2e8f9f7 82 BusOut& BusOut::operator= (BusOut& rhs) {
<> 144:ef7eb2e8f9f7 83 // Underlying write is thread safe
<> 144:ef7eb2e8f9f7 84 write(rhs.read());
<> 144:ef7eb2e8f9f7 85 return *this;
<> 144:ef7eb2e8f9f7 86 }
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 DigitalOut& BusOut::operator[] (int index) {
<> 144:ef7eb2e8f9f7 89 // No lock needed since _pin is not modified outside the constructor
<> 144:ef7eb2e8f9f7 90 MBED_ASSERT(index >= 0 && index <= 16);
<> 144:ef7eb2e8f9f7 91 MBED_ASSERT(_pin[index]);
<> 144:ef7eb2e8f9f7 92 return *_pin[index];
<> 144:ef7eb2e8f9f7 93 }
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 BusOut::operator int() {
<> 144:ef7eb2e8f9f7 96 // Underlying read is thread safe
<> 144:ef7eb2e8f9f7 97 return read();
<> 144:ef7eb2e8f9f7 98 }
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 void BusOut::lock() {
<> 144:ef7eb2e8f9f7 101 _mutex.lock();
<> 144:ef7eb2e8f9f7 102 }
<> 144:ef7eb2e8f9f7 103
<> 144:ef7eb2e8f9f7 104 void BusOut::unlock() {
<> 144:ef7eb2e8f9f7 105 _mutex.unlock();
<> 144:ef7eb2e8f9f7 106 }
<> 144:ef7eb2e8f9f7 107
<> 144:ef7eb2e8f9f7 108 } // namespace mbed