mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

drivers/BusIn.cpp@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
187:0387e8f68319 
mbed library release version 165

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
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 6 * you may not use this file except in compliance with the License.
<> 149:156823d33999 7 * You may obtain a copy of the License at
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 10 *
<> 149:156823d33999 11 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 12 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 14 * See the License for the specific language governing permissions and
<> 149:156823d33999 15 * limitations under the License.
<> 149:156823d33999 16 */
<> 149:156823d33999 17 #include "drivers/BusIn.h"
<> 149:156823d33999 18 #include "platform/mbed_assert.h"
<> 149:156823d33999 19
<> 149:156823d33999 20 namespace mbed {
<> 149:156823d33999 21
AnnaBridge 187:0387e8f68319 22 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)
AnnaBridge 187:0387e8f68319 23 {
<> 149:156823d33999 24 PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
<> 149:156823d33999 25
<> 149:156823d33999 26 // No lock needed in the constructor
<> 149:156823d33999 27 _nc_mask = 0;
AnnaBridge 187:0387e8f68319 28 for (int i = 0; i < 16; i++) {
<> 149:156823d33999 29 _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0;
<> 149:156823d33999 30 if (pins[i] != NC) {
<> 149:156823d33999 31 _nc_mask |= (1 << i);
<> 149:156823d33999 32 }
<> 149:156823d33999 33 }
<> 149:156823d33999 34 }
<> 149:156823d33999 35
AnnaBridge 187:0387e8f68319 36 BusIn::BusIn(PinName pins[16])
AnnaBridge 187:0387e8f68319 37 {
<> 149:156823d33999 38 // No lock needed in the constructor
<> 149:156823d33999 39 _nc_mask = 0;
AnnaBridge 187:0387e8f68319 40 for (int i = 0; i < 16; i++) {
<> 149:156823d33999 41 _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0;
<> 149:156823d33999 42 if (pins[i] != NC) {
<> 149:156823d33999 43 _nc_mask |= (1 << i);
<> 149:156823d33999 44 }
<> 149:156823d33999 45 }
<> 149:156823d33999 46 }
<> 149:156823d33999 47
AnnaBridge 187:0387e8f68319 48 BusIn::~BusIn()
AnnaBridge 187:0387e8f68319 49 {
<> 149:156823d33999 50 // No lock needed in the destructor
AnnaBridge 187:0387e8f68319 51 for (int i = 0; i < 16; i++) {
<> 149:156823d33999 52 if (_pin[i] != 0) {
<> 149:156823d33999 53 delete _pin[i];
<> 149:156823d33999 54 }
<> 149:156823d33999 55 }
<> 149:156823d33999 56 }
<> 149:156823d33999 57
AnnaBridge 187:0387e8f68319 58 int BusIn::read()
AnnaBridge 187:0387e8f68319 59 {
<> 149:156823d33999 60 int v = 0;
<> 149:156823d33999 61 lock();
AnnaBridge 187:0387e8f68319 62 for (int i = 0; i < 16; i++) {
<> 149:156823d33999 63 if (_pin[i] != 0) {
<> 149:156823d33999 64 v |= _pin[i]->read() << i;
<> 149:156823d33999 65 }
<> 149:156823d33999 66 }
<> 149:156823d33999 67 unlock();
<> 149:156823d33999 68 return v;
<> 149:156823d33999 69 }
<> 149:156823d33999 70
AnnaBridge 187:0387e8f68319 71 void BusIn::mode(PinMode pull)
AnnaBridge 187:0387e8f68319 72 {
<> 149:156823d33999 73 lock();
AnnaBridge 187:0387e8f68319 74 for (int i = 0; i < 16; i++) {
<> 149:156823d33999 75 if (_pin[i] != 0) {
<> 149:156823d33999 76 _pin[i]->mode(pull);
<> 149:156823d33999 77 }
<> 149:156823d33999 78 }
<> 149:156823d33999 79 unlock();
<> 149:156823d33999 80 }
<> 149:156823d33999 81
AnnaBridge 187:0387e8f68319 82 void BusIn::lock()
AnnaBridge 187:0387e8f68319 83 {
<> 149:156823d33999 84 _mutex.lock();
<> 149:156823d33999 85 }
<> 149:156823d33999 86
AnnaBridge 187:0387e8f68319 87 void BusIn::unlock()
AnnaBridge 187:0387e8f68319 88 {
<> 149:156823d33999 89 _mutex.unlock();
<> 149:156823d33999 90 }
<> 149:156823d33999 91
AnnaBridge 187:0387e8f68319 92 BusIn::operator int()
AnnaBridge 187:0387e8f68319 93 {
<> 149:156823d33999 94 // Underlying read is thread safe
<> 149:156823d33999 95 return read();
<> 149:156823d33999 96 }
<> 149:156823d33999 97
AnnaBridge 187:0387e8f68319 98 DigitalIn &BusIn::operator[](int index)
AnnaBridge 187:0387e8f68319 99 {
<> 149:156823d33999 100 // No lock needed since _pin is not modified outside the constructor
AnnaBridge 189:f392fc9709a3 101 MBED_ASSERT(index >= 0 && index < 16);
<> 149:156823d33999 102 MBED_ASSERT(_pin[index]);
<> 149:156823d33999 103 return *_pin[index];
<> 149:156823d33999 104 }
<> 149:156823d33999 105
<> 149:156823d33999 106 } // namespace mbed