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BusIn.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #include "BusIn.h"
00017 #include "mbed_assert.h"
00018 
00019 namespace mbed {
00020 
00021 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) {
00022     PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
00023 
00024     _nc_mask = 0;
00025     for (int i=0; i<16; i++) {
00026         _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0;
00027         if (pins[i] != NC) {
00028             _nc_mask |= (1 << i);
00029         }
00030     }
00031 }
00032 
00033 BusIn::BusIn(PinName pins[16]) {
00034     _nc_mask = 0;
00035     for (int i=0; i<16; i++) {
00036         _pin[i] = (pins[i] != NC) ? new DigitalIn(pins[i]) : 0;
00037         if (pins[i] != NC) {
00038             _nc_mask |= (1 << i);
00039         }
00040     }
00041 }
00042 
00043 BusIn::~BusIn() {
00044     for (int i=0; i<16; i++) {
00045         if (_pin[i] != 0) {
00046             delete _pin[i];
00047         }
00048     }
00049 }
00050 
00051 int BusIn::read() {
00052     int v = 0;
00053     for (int i=0; i<16; i++) {
00054         if (_pin[i] != 0) {
00055             v |= _pin[i]->read() << i;
00056         }
00057     }
00058     return v;
00059 }
00060 
00061 void BusIn::mode(PinMode pull) {
00062     for (int i=0; i<16; i++) {
00063         if (_pin[i] != 0) {
00064             _pin[i]->mode(pull);
00065         }
00066     }
00067 }
00068 
00069 #ifdef MBED_OPERATORS
00070 BusIn::operator int() {
00071     return read();
00072 }
00073 
00074 DigitalIn& BusIn::operator[] (int index) {
00075     MBED_ASSERT(index >= 0 && index <= 16);
00076     MBED_ASSERT(_pin[index]);
00077     return *_pin[index];
00078 }
00079 
00080 #endif
00081 
00082 } // namespace mbed