Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

drivers/BusOut.cpp@166:33361e55dd8c, 2017-08-23 (annotated)

Committer:
iftaziz
Date:
Wed Aug 23 10:32:38 2017 +0000
Revision:
166:33361e55dd8c
Parent:
149:156823d33999 
r1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 5 * you may not use this file except in compliance with the License.
<> 149:156823d33999 6 * You may obtain a copy of the License at
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 9 *
<> 149:156823d33999 10 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 13 * See the License for the specific language governing permissions and
<> 149:156823d33999 14 * limitations under the License.
<> 149:156823d33999 15 */
<> 149:156823d33999 16 #include "drivers/BusOut.h"
<> 149:156823d33999 17 #include "platform/mbed_assert.h"
<> 149:156823d33999 18
<> 149:156823d33999 19 namespace mbed {
<> 149:156823d33999 20
<> 149:156823d33999 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) {
<> 149:156823d33999 22 PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
<> 149:156823d33999 23
<> 149:156823d33999 24 // No lock needed in the constructor
<> 149:156823d33999 25 _nc_mask = 0;
<> 149:156823d33999 26 for (int i=0; i<16; i++) {
<> 149:156823d33999 27 _pin[i] = (pins[i] != NC) ? new DigitalOut(pins[i]) : 0;
<> 149:156823d33999 28 if (pins[i] != NC) {
<> 149:156823d33999 29 _nc_mask |= (1 << i);
<> 149:156823d33999 30 }
<> 149:156823d33999 31 }
<> 149:156823d33999 32 }
<> 149:156823d33999 33
<> 149:156823d33999 34 BusOut::BusOut(PinName pins[16]) {
<> 149:156823d33999 35 // No lock needed in the constructor
<> 149:156823d33999 36 _nc_mask = 0;
<> 149:156823d33999 37 for (int i=0; i<16; i++) {
<> 149:156823d33999 38 _pin[i] = (pins[i] != NC) ? new DigitalOut(pins[i]) : 0;
<> 149:156823d33999 39 if (pins[i] != NC) {
<> 149:156823d33999 40 _nc_mask |= (1 << i);
<> 149:156823d33999 41 }
<> 149:156823d33999 42 }
<> 149:156823d33999 43 }
<> 149:156823d33999 44
<> 149:156823d33999 45 BusOut::~BusOut() {
<> 149:156823d33999 46 // No lock needed in the destructor
<> 149:156823d33999 47 for (int i=0; i<16; i++) {
<> 149:156823d33999 48 if (_pin[i] != 0) {
<> 149:156823d33999 49 delete _pin[i];
<> 149:156823d33999 50 }
<> 149:156823d33999 51 }
<> 149:156823d33999 52 }
<> 149:156823d33999 53
<> 149:156823d33999 54 void BusOut::write(int value) {
<> 149:156823d33999 55 lock();
<> 149:156823d33999 56 for (int i=0; i<16; i++) {
<> 149:156823d33999 57 if (_pin[i] != 0) {
<> 149:156823d33999 58 _pin[i]->write((value >> i) & 1);
<> 149:156823d33999 59 }
<> 149:156823d33999 60 }
<> 149:156823d33999 61 unlock();
<> 149:156823d33999 62 }
<> 149:156823d33999 63
<> 149:156823d33999 64 int BusOut::read() {
<> 149:156823d33999 65 lock();
<> 149:156823d33999 66 int v = 0;
<> 149:156823d33999 67 for (int i=0; i<16; i++) {
<> 149:156823d33999 68 if (_pin[i] != 0) {
<> 149:156823d33999 69 v |= _pin[i]->read() << i;
<> 149:156823d33999 70 }
<> 149:156823d33999 71 }
<> 149:156823d33999 72 unlock();
<> 149:156823d33999 73 return v;
<> 149:156823d33999 74 }
<> 149:156823d33999 75
<> 149:156823d33999 76 BusOut& BusOut::operator= (int v) {
<> 149:156823d33999 77 // Underlying write is thread safe
<> 149:156823d33999 78 write(v);
<> 149:156823d33999 79 return *this;
<> 149:156823d33999 80 }
<> 149:156823d33999 81
<> 149:156823d33999 82 BusOut& BusOut::operator= (BusOut& rhs) {
<> 149:156823d33999 83 // Underlying write is thread safe
<> 149:156823d33999 84 write(rhs.read());
<> 149:156823d33999 85 return *this;
<> 149:156823d33999 86 }
<> 149:156823d33999 87
<> 149:156823d33999 88 DigitalOut& BusOut::operator[] (int index) {
<> 149:156823d33999 89 // No lock needed since _pin is not modified outside the constructor
<> 149:156823d33999 90 MBED_ASSERT(index >= 0 && index <= 16);
<> 149:156823d33999 91 MBED_ASSERT(_pin[index]);
<> 149:156823d33999 92 return *_pin[index];
<> 149:156823d33999 93 }
<> 149:156823d33999 94
<> 149:156823d33999 95 BusOut::operator int() {
<> 149:156823d33999 96 // Underlying read is thread safe
<> 149:156823d33999 97 return read();
<> 149:156823d33999 98 }
<> 149:156823d33999 99
<> 149:156823d33999 100 void BusOut::lock() {
<> 149:156823d33999 101 _mutex.lock();
<> 149:156823d33999 102 }
<> 149:156823d33999 103
<> 149:156823d33999 104 void BusOut::unlock() {
<> 149:156823d33999 105 _mutex.unlock();
<> 149:156823d33999 106 }
<> 149:156823d33999 107
<> 149:156823d33999 108 } // namespace mbed