mbed library sources
Dependents: Freedman_v2 Nucleo_i2c_OLED_BME280_copy
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Diff: api/BusOut.h
- Revision:
- 9:0ce32e54c9a7
- Parent:
- 2:143cac498751
- Child:
- 10:3bc89ef62ce7
diff -r 4e25b8576136 -r 0ce32e54c9a7 api/BusOut.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/api/BusOut.h Mon Jun 10 16:03:00 2013 +0100 @@ -0,0 +1,76 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#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