Steven Wray / mbed-dev

mbed library sources. Supersedes mbed-src.

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common/BusInOut.cpp@148:e70627d019e9, 2016-09-28 (annotated)

Committer:
StevieWray
Date:
Wed Sep 28 08:45:18 2016 +0000
Revision:
148:e70627d019e9
Parent:
144:ef7eb2e8f9f7 
Fixed DAC output on STM32F3 boards to allow 3 outputs

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 "BusInOut.h"
<> 144:ef7eb2e8f9f7 17 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 namespace mbed {
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 BusInOut::BusInOut(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 DigitalInOut(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 BusInOut::BusInOut(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 DigitalInOut(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 BusInOut::~BusInOut() {
<> 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 BusInOut::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 BusInOut::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 void BusInOut::output() {
<> 144:ef7eb2e8f9f7 77 lock();
<> 144:ef7eb2e8f9f7 78 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 79 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 80 _pin[i]->output();
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82 }
<> 144:ef7eb2e8f9f7 83 unlock();
<> 144:ef7eb2e8f9f7 84 }
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86 void BusInOut::input() {
<> 144:ef7eb2e8f9f7 87 lock();
<> 144:ef7eb2e8f9f7 88 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 89 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 90 _pin[i]->input();
<> 144:ef7eb2e8f9f7 91 }
<> 144:ef7eb2e8f9f7 92 }
<> 144:ef7eb2e8f9f7 93 unlock();
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 void BusInOut::mode(PinMode pull) {
<> 144:ef7eb2e8f9f7 97 lock();
<> 144:ef7eb2e8f9f7 98 for (int i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 99 if (_pin[i] != 0) {
<> 144:ef7eb2e8f9f7 100 _pin[i]->mode(pull);
<> 144:ef7eb2e8f9f7 101 }
<> 144:ef7eb2e8f9f7 102 }
<> 144:ef7eb2e8f9f7 103 unlock();
<> 144:ef7eb2e8f9f7 104 }
<> 144:ef7eb2e8f9f7 105
<> 144:ef7eb2e8f9f7 106 BusInOut& BusInOut::operator= (int v) {
<> 144:ef7eb2e8f9f7 107 // Underlying write is thread safe
<> 144:ef7eb2e8f9f7 108 write(v);
<> 144:ef7eb2e8f9f7 109 return *this;
<> 144:ef7eb2e8f9f7 110 }
<> 144:ef7eb2e8f9f7 111
<> 144:ef7eb2e8f9f7 112 BusInOut& BusInOut::operator= (BusInOut& rhs) {
<> 144:ef7eb2e8f9f7 113 // Underlying read is thread safe
<> 144:ef7eb2e8f9f7 114 write(rhs.read());
<> 144:ef7eb2e8f9f7 115 return *this;
<> 144:ef7eb2e8f9f7 116 }
<> 144:ef7eb2e8f9f7 117
<> 144:ef7eb2e8f9f7 118 DigitalInOut& BusInOut::operator[] (int index) {
<> 144:ef7eb2e8f9f7 119 // No lock needed since _pin is not modified outside the constructor
<> 144:ef7eb2e8f9f7 120 MBED_ASSERT(index >= 0 && index <= 16);
<> 144:ef7eb2e8f9f7 121 MBED_ASSERT(_pin[index]);
<> 144:ef7eb2e8f9f7 122 return *_pin[index];
<> 144:ef7eb2e8f9f7 123 }
<> 144:ef7eb2e8f9f7 124
<> 144:ef7eb2e8f9f7 125 BusInOut::operator int() {
<> 144:ef7eb2e8f9f7 126 // Underlying read is thread safe
<> 144:ef7eb2e8f9f7 127 return read();
<> 144:ef7eb2e8f9f7 128 }
<> 144:ef7eb2e8f9f7 129
<> 144:ef7eb2e8f9f7 130 void BusInOut::lock() {
<> 144:ef7eb2e8f9f7 131 _mutex.lock();
<> 144:ef7eb2e8f9f7 132 }
<> 144:ef7eb2e8f9f7 133
<> 144:ef7eb2e8f9f7 134 void BusInOut::unlock() {
<> 144:ef7eb2e8f9f7 135 _mutex.unlock();
<> 144:ef7eb2e8f9f7 136 }
<> 144:ef7eb2e8f9f7 137
<> 144:ef7eb2e8f9f7 138 } // namespace mbed