BusOut.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 "BusOut.h"
00017 
00018 namespace mbed {
00019 
00020 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) {
00021     PinName pins[16] = {p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15};
00022 
00023     for (int i=0; i<16; i++) {
00024         _pin[i] = (pins[i] != NC) ? new DigitalOut(pins[i]) : 0;
00025     }
00026 }
00027 
00028 BusOut::BusOut(PinName pins[16]) {
00029     for (int i=0; i<16; i++) {
00030         _pin[i] = (pins[i] != NC) ? new DigitalOut(pins[i]) : 0;
00031     }
00032 }
00033 
00034 BusOut::~BusOut() {
00035     for (int i=0; i<16; i++) {
00036         if (_pin[i] != 0) {
00037             delete _pin[i];
00038         }
00039     }
00040 }
00041 
00042 void BusOut::write(int value) {
00043     for (int i=0; i<16; i++) {
00044         if (_pin[i] != 0) {
00045             _pin[i]->write((value >> i) & 1);
00046         }
00047     }
00048 }
00049 
00050 int BusOut::read() {
00051     int v = 0;
00052     for (int i=0; i<16; i++) {
00053         if (_pin[i] != 0) {
00054             v |= _pin[i]->read() << i;
00055         }
00056     }
00057     return v;
00058 }
00059 
00060 #ifdef MBED_OPERATORS
00061 BusOut& BusOut::operator= (int v) {
00062     write(v);
00063     return *this;
00064 }
00065 
00066 BusOut& BusOut::operator= (BusOut& rhs) {
00067     write(rhs.read());
00068     return *this;
00069 }
00070 
00071 BusOut::operator int() {
00072     return read();
00073 }
00074 #endif
00075 
00076 } // namespace mbed