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Diff: cpp/BusOut.h
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- 0:fd0d7bdfcdc2
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diff -r 000000000000 -r fd0d7bdfcdc2 cpp/BusOut.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cpp/BusOut.h Tue Nov 20 17:24:08 2012 +0000 @@ -0,0 +1,82 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2012 ARM Limited + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef MBED_BUSOUT_H +#define MBED_BUSOUT_H + +#include "DigitalOut.h" + +namespace mbed { + +/** A digital output bus, used for setting the state of a collection of pins + */ +class BusOut { + +public: + + /** Create an BusOut, connected to the specified pins + * + * @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC) + * + * @note + * It is only required to specify as many pin variables as is required + * for the bus; the rest will default to NC (not connected) + */ + BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC, + PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC, + PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC, + PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC); + + BusOut(PinName pins[16]); + + virtual ~BusOut(); + + /** Write the value to the output bus + * + * @param value An integer specifying a bit to write for every corresponding DigitalOut pin + */ + void write(int value); + + /** Read the value currently output on the bus + * + * @returns + * An integer with each bit corresponding to associated DigitalOut pin setting + */ + int read(); + +#ifdef MBED_OPERATORS + /** A shorthand for write() + */ + BusOut& operator= (int v); + BusOut& operator= (BusOut& rhs); + + /** A shorthand for read() + */ + operator int(); +#endif + +protected: + DigitalOut* _pin[16]; +}; + +} // namespace mbed + +#endif